LIEBHERR-AEROSPACE LINDENBERG GmbH

(FSCM) D9893

COMPONENT MAINTENANCE MANUAL

WITH
ILLUSTRATED PARTS LIST

PRESSURE REGULATING VALVE

Part Number
746A0000-06

Issued by
LIEBHERR-AEROSPACE LINDENBERG GmbH
Customer Service
Postfach 1363
D-88153 Lindenberg
Germany

Tel. +49 (0)8381/46-211 Fax. +49 (0)8381/46-103

SITA Code FDHLEXD

TITLE PAGE

Initial Issue: 21-62-11 Jun 25/98

© Copyright Liebherr-Aerospace Lindenberg GmbH 1998

This document is given in confidence and may not be reproduced, stored in a retrieval
system, or transmitted, in any form or by any means, electronic, mechanical,
photocopying, recording, or otherwise, without the prior written permission of
Liebherr-Aerospace Lindenberg GmbH.

Unless Liebherr-Aerospace Lindenberg GmbH (the company) has accepted a

contractual obligation in respect of the information and data contained herein, such
information and data is provided without responsibility and the company disclaim all
liability arising from its use.
 LIEBHERR-AEROSPACE LINDENBERG GmbH

COMPONENT MAINTENANCE MANUAL

746A0000

RECORD OF REVISIONS

REVISION REVISION
INSERTED BY DATE INSERTED BY DATE
NUMBER NUMBER

ROR

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RECORD OF TEMPORARY REVISIONS

TEMPORARY CANCELLED TEMPORARY CANCELLED

INSERTED INSERTED
REVISION DATE BY REVISION DATE BY
BY BY
NUMBER REVISION NUMBER REVISION

RTR
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COMPONENT MAINTENANCE MANUAL

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SERVICE BULLETIN LIST

SERVICE REV MOD INCLUDED STATEMENT OF

TITLE
BULLETIN NO. NO. IN CMM REV. APPLICABILITY

SBL
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COMPONENT MAINTENANCE MANUAL

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LIST OF EFFECTIVE PAGES

LIST OF EFFECTIVE PAGES

PAGE DATE PAGE DATE PAGE DATE

TITLE PAGE Jun 25/98 7 Jun 25/98 302 Jun 25/98

COPYRIGHT --- 8 Jun 25/98 303 Jun 25/98
RECORD OF REVISIONS TESTING AND FAULT ISOLATION 304 Jun 25/98
1 Jun 25/98 101 Jun 25/98 305 Jun 25/98
2 BLANK 102 Jun 25/98 306 Jun 25/98
RECORD OF TEMPORARY 103 Jun 25/98 307 Jun 25/98
REVISIONS 104 Jun 25/98 308 Jun 25/98
1 Jun 25/98 105 Jun 25/98 309 Jun 25/98
2 BLANK 106 Jun 25/98 310 Jun 25/98
SERVICE BULLETIN LIST 107 Jun 25/98 311 Jun 25/98
1 Jun 25/98 108 Jun 25/98 312 Jun 25/98
2 BLANK 109 Jun 25/98 313 Jun 25/98
LIST OF EFFECTIVE PAGES 110 Jun 25/98 314 Jun 25/98
1 Jun 25/98 111 Jun 25/98 CLEANING
2 Jun 25/98 112 Jun 25/98 401 Jun 25/98
LIST OF MATERIALS 113 Jun 25/98 402 Jun 25/98
1 Jun 25/98 114 Jun 25/98 CHECK
2 Jun 25/98 115 Jun 25/98 501 Jun 25/98
3 Jun 25/98 116 Jun 25/98 502 Jun 25/98
4 BLANK 117 Jun 25/98 503 Jun 25/98
TABLE OF CONTENTS 118 Jun 25/98 504 BLANK
1 Jun 25/98 119 Jun 25/98 REPAIR
2 Jun 25/98 120 Jun 25/98 601 Jun 25/98
3 Jun 25/98 121 Jun 25/98 602 Jun 25/98
4 Jun 25/98 122 Jun 25/98 603 Jun 25/98
5 Jun 25/98 123 Jun 25/98 604 Jun 25/98
6 BLANK 124 Jun 25/98 605 Jun 25/98
INTRODUCTION 125 Jun 25/98 606 Jun 25/98
1 Jun 25/98 126 Jun 25/98 ASSEMBLY, INCLUDING
2 Jun 25/98 127 Jun 25/98 STORAGE
DESCRIPTION AND OPERATION 128 Jun 25/98 701 Jun 25/98
1 Jun 25/98 129 Jun 25/98 702 Jun 25/98
2 Jun 25/98 130 Jun 25/98 703 Jun 25/98
3 Jun 25/98 131 Jun 25/98 704 Jun 25/98
4 Jun 25/98 132 BLANK 705 Jun 25/98
5 Jun 25/98 DISASSEMBLY 706 Jun 25/98
6 Jun 25/98 301 Jun 25/98 707 Jun 25/98

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LIST OF EFFECTIVE PAGES (continued)

PAGE DATE PAGE DATE PAGE DATE

708 Jun 25/98 ILLUSTRATED PARTS LIST 1037 Jun 25/98

709 Jun 25/98 1001 Jun 25/98 1038 Jun 25/98
710 Jun 25/98 1002 Jun 25/98 1039 Jun 25/98
711 Jun 25/98 1003 Jun 25/98 1040 Jun 25/98
712 Jun 25/98 1004 Jun 25/98 1041 Jun 25/98
713 Jun 25/98 1005 Jun 25/98 1042 Jun 25/98
714 Jun 25/98 1006 Jun 25/98 1043 Jun 25/98
715 Jun 25/98 1007 Jun 25/98 1044 BLANK
716 Jun 25/98 1008 Jun 25/98
717 Jun 25/98 1009 Jun 25/98
718 Jun 25/98 1010 Jun 25/98
719 Jun 25/98 1011 Jun 25/98
720 Jun 25/98 1012 Jun 25/98
721 Jun 25/98 1013 Jun 25/98
722 Jun 25/98 1014 Jun 25/98
723 Jun 25/98 1015 Jun 25/98
724 Jun 25/98 1016 Jun 25/98
725 Jun 25/98 1017 Jun 25/98
726 Jun 25/98 1018 Jun 25/98
727 Jun 25/98 1019 Jun 25/98
728 Jun 25/98 1020 Jun 25/98
729 Jun 25/98 1021 Jun 25/98
730 BLANK 1022 Jun 25/98
FITS AND CLEARANCES 1023 Jun 25/98
801 Jun 25/98 1024 Jun 25/98
802 Jun 25/98 1025 Jun 25/98
803 Jun 25/98 1026 Jun 25/98
804 Jun 25/98 1027 Jun 25/98
805 Jun 25/98 1028 Jun 25/98
806 BLANK 1029 Jun 25/98
SPECIAL TOOLS, FIXTURES AND 1030 Jun 25/98
EQUIPMENT 1031 Jun 25/98
901 Jun 25/98 1032 Jun 25/98
902 Jun 25/98 1033 Jun 25/98
903 Jun 25/98 1034 Jun 25/98
904 Jun 25/98 1035 Jun 25/98
1036 Jun 25/98

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 LIEBHERR-AEROSPACE LINDENBERG GmbH

COMPONENT MAINTENANCE MANUAL

746A0000

LIST OF MATERIALS

NOTE: You can use approved alternatives.

LIST OF MATERIALS

USE
FSCM

DISASSEMBLY
DESIGNATION
SUPPLIERS NAME

ASSEMBLY
CLEANING
AND

STORAGE
AND

TESTING
SPECIFICATION

REPAIR
CHECK
ADDRESS

Ethyl Alcohol (O-E-76b) Local Purchase X X

Turco Solv LO D8908 X

TURCO-CHEMIE GMBH
Wandsbeker Stieg 23
Postfach 3233
22087 Hamburg

Germany

Flouride Acid (density 1.13) Local Purchase X

Nitric Acid (density 1.33) Local Purchase X

Sodium Bichromate (99% purified powder) Local Purchase X

Demineralized Water Local Purchase X

Carbon Solvent GAMLEN INDUSTRIES SA X

62 - 70 Rue Yvan Tourgueneff
78380 Bougival
France

Thermofit Sleeve RNF 3000-39-13-2 (read) D1973 X

RAYCHEM GMBH
Haidgraben 6
85521 Ottobrunn
Germany

Alodine 1200 D2010 X

GERHARD COLLARDIN GMBH

Am Bahnhof
35745 Herbron-Schoenbach
Germany

Loctite 222 D2617 X

Loctite 601 LOCTITE DEUTSCHLAND GMBH X

Arabellastrasse 17
Loctite 620 Postfach 810580 X
81905 Muenchen
Germany
Graphite Powder Local Purchase X

LOM
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21-62-11 Jun 25/98
 LIEBHERR-AEROSPACE LINDENBERG GmbH

COMPONENT MAINTENANCE MANUAL

746A0000

LIST OF MATERIALS (continued)

USE
FSCM

DISASSEMBLY
DESIGNATION
SUPPLIERS NAME

ASSEMBLY
CLEANING
AND

STORAGE
AND

TESTING
SPECIFICATION

REPAIR
CHECK
ADDRESS

Locking Wire (LN9424-1-4546-9-0-63) Local Purchase X

Molykote 106 D8367 X

Thinner for Molykote 106 DOW CORNING GMBH X

Schmierstoffe
Silicone Silastic 732 RTV Pelkovenstrasse 152 X
80992 Muenchen 50
Adhesive/Sealant Silastic 738 RTV Germany X

Silicone Rhodorsil Grease 55 F0107 X

(MIL-G-4343)
RHONE-POULENC DIV CHEMIE
18 Rue d'Alsace
92097 Paris la Devense
Cedex 29
France

Vaseline Brisal OX50-855 F0217 X X

LABINAL SA
5 Avenue Newton
78051 St. Quentin en
Yvelines
France

Compound Skoly C5A (MIL-A-907) F0438 X

LE CARBONE LORRAINE CEFILAC

ERTACHIETE SA
Tour Manhattan
5, 6 Place de L'Iris
92400 Courbevoie
France

Desiccant Local Purchase X

Clear Varnish Local Purchase X

Polythene Bag Local Purchase X

Thickness 0.2 mm (0.008 in.) min.

Waxed-Paper Local Purchase X

White Ink (Indelible) Local Purchase X

LOM

21-62-11 Page 2
Jun 25/98
 LIEBHERR-AEROSPACE LINDENBERG GmbH

COMPONENT MAINTENANCE MANUAL

746A0000

LIST OF MATERIALS (continued)

USE
FSCM

DISASSEMBLY
DESIGNATION
SUPPLIERS NAME

ASSEMBLY
CLEANING
AND

STORAGE
AND

TESTING
SPECIFICATION

REPAIR
CHECK
ADDRESS

Deoxidine 624 F2865 X

CIE FRANCAISE DE PRODUITS

INDUSTRIELS
28 Boulevard Camelinat
92233 Gennevillers
France

Safety Lacque red 9036-2 F3533 X

MESPOULET (J.)
37 Rue de Liege
75008 Paris
France

Aerodur Clearcoat UVR 890-6235 H0951 X

SIKKENS LAKFABRIEKEN BV
Hardener S66/22-R X
Ryksstraatweg 31
2171 AJ Sassenheim
Aerodur Finish C21-100UVR red
Nederland

Jenolite RRN 1 K4859 X

DUCKHAM ALEXANDER & CO LTD
Jenolite Works
Rusham Road
Egham
Surrey TW20 9SN
United Kingdom

Heat Conductive Paste WLP500 C0935 X

FISCHER ELEKTRONIK GmbH
Am Drostenstueck 24
58507 Luedenscheid
Germany

Soft Solder Wire L-SN63PB37RS15N122, C7357 X

1mm
BILLITON WITMETAAL GMBH
MIL-F-14256
Werkstrasse 5
QQ-S-571E RMA
90518 Altdorf
Germany

LOM
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21-62-11 Jun 25/98
 LIEBHERR-AEROSPACE LINDENBERG GmbH
TABLE OF CONTENTS
COMPONENT MAINTENANCE MANUAL
746A0000

TABLE OF CONTENTS

TITLE PAGE
RECORD OF REVISIONS
RECORD OF TEMPORARY REVISIONS
SERVICE BULLETIN LIST
LIST OF EFFECTIVE PAGES
LIST OF MATERIALS
TABLE OF CONTENTS
Page

INTRODUCTION
1. General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2. Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
3. Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

DESCRIPTION AND OPERATION

1. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
A. General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
B. Valve Housing Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
C. Pneumatic Actuator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
D. Microswitch Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
E. Pressure Control Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
F. Solenoid Valve Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
G. Solenoid Dummy Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
H. Filter Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2. Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
A. Regulator Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
B. Shut-off Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3. Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

TESTING AND FAULT ISOLATION

4. General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
5. Additional Equipment and Items. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
A. Special Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
B. Additional Equipment Necessary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
C. Measuring Instruments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
D. Additional Test Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
6. Adjustment Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
A. Valve Flap Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
B. Adjustment of the Microswitch Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
C. Adjustment of the Pressure Control Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

TOC
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TABLE OF CONTENTS (continued)

Page

7. Test Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

A. Visual Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
B. Bonding Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
C. Test of the Valve Flap Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
D. Proof Pressure Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
(1) Proof Pressure Test - Valve Flap Opened . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
(2) Proof Pressure Test - Valve Flap Closed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
(3) Proof Pressure Test of the Pressure Control Valve . . . . . . . . . . . . . . . . . . . . . . . . . 111
E. Running-in . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
F. Test of the Pressure Control-Valve Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
G. Test of the Microswitch Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
H. Internal Leakage Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
I. Closing Function Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
J. Closing Time Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
K. Friction Test “cold” . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
L. Normal Function Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
M. Working Temperature - Friction Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
N. Working Temperature - Closing Time Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
O. Working Temperature - Function Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
P. External Leakage Test - Ring Seal (3-240) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Q. External Leakage Test - Downstream Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
8. Test Procedure of the Solenoid Dummy Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
A. Additional Equipment and Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
B. Visual Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
C. Bonding Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
D. Resistance Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
E. Insulation Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
9. Test Procedure of the Solenoid Valve Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
A. Additional Equipment and Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
B. Visual Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
C. Bonding Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
D. Resistance Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
E. Insulation Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
F. Flow Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
G. Leakage Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
H. Visual Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

TOC
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TABLE OF CONTENTS (continued)

Page

10. Microswitch Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

A. Insulation Resistance Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
11. Fault Isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

DISASSEMBLY
1. General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 301
2. Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 301
A. Removal of the Solenoid Valve Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 301
B. Removal of the Solenoid Dummy Assembly or the Solenoid Valve Assembly . . . . . . . 302
C. Disassembly of the Filter Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303
D. Removal of the Microswitch Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304
E. Removal of the Tube Assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304
F. Removal of the Pressure Control Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306
G. Removal of the Identification Plate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306
H. Disassembly of the Linkage Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306
I. Disassembly of the Pneumatic Actuator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 308
J. Removal of the Valve Flap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 308
K. Disassembly of the Valve Housing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 309
L. Removal of the Sound Absorber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 309
M. Disassembly of the Pressure Control Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 309
N. Disassembly of the Solenoid Dummy Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313
O. Disassembly the Solenoid-Valve Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 314
P. Disassembly the Microswitch Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 314

CLEANING
1. Cleaning of Assembly Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 401
2. Cleaning of Electrical Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 401
3. Cleaning of New Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 402

CHECK
1. General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 501
2. Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 501
A. Design Changes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 501
B. Visual Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 501
C. Dimensional Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 501
D. Spring Characteristics Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 502
E. Microswitch Assembly Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 502
(1) Lever Operation Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 502

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TABLE OF CONTENTS (continued)

Page

(2) Insulation Resistance Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 503

F. Light Alloy Crack Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 503
G. Steel Crack Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 503
3. Parts Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 503

REPAIR
1. General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 601
2. Removal of Corrosion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 601
3. Surface Treatment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 601
4. Special Repairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 601
A. Replacement of the Coil Inserts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 601
B. Repair of the Molybdenum-Disulphide Coating of the Bush (3-30) . . . . . . . . . . . . . . . . 603
C. Repair of the Microswitch Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 604
(1) Disassembly of the Microswitch Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 604
(2) Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 604
(3) Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 604
(4) Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 604
D. Repair of the Identification Mark Areas on the Solenoid Dummy Assembly . . . . . . . . . 605

ASSEMBLY, INCLUDING STORAGE

1. General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 701
2. Special Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 701
3. Special Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 701
4. Assembly Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 701
A. Assembly of the Solenoid Valve Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 701
B. Assembly of the Solenoid Dummy Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 704
C. Pressure-Control Valve Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 706
D. Installation of the Sound Absorber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 710
E. Assembly of the Pneumatic Actuator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 710
F. Valve Housing Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 713
G. Pneumatic Actuator Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 716
H. Installation of the Valve Flap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 716
I. Linkage Assembly Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 717
J. Installation of the Pressure Control Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 719
K. Installation of the Identification Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 719
L. Installation of the Solenoid Valve Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 719
M. Installation of the Solenoid Dummy Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 721

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TABLE OF CONTENTS (continued)

Page

N. Installation of the Solenoid Valve Assembly (1-190B) . . . . . . . . . . . . . . . . . . . . . . . . . . 721

O. Installation of the Filter Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 722
P. Installation of the Tube Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 723
Q. Adjustment of the Valve Flap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 724
R. Final Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 725
5. Storage Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 726
A. General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 726
B. Preparation and Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 726
C. Removal from Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 729

FITS AND CLEARANCES

1. General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 801
2. Fits and Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 801
3. Torque Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 801
4. Spring Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 801

SPECIAL TOOLS, FIXTURES AND EQUIPMENT

1. General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 901

ILLUSTRATED PARTS LIST

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1002
1. General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1002
A. Numerical Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1002
B. Detailed Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1002
C. How to use the IPL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1002
(1) Part number known . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1002
(2) Part Number unknown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1003
D. Symbols and Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1003
E. Effectivity Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1003
F. Vendor Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1004
NUMERICAL INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1007
DETAILED PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1017

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INTRODUCTION

1. General

A. This manual gives all the necessary data to understand the function, repair and overhaul of
the Pressure Regulating Valve. The Air Transport Association of America specification ATA
100, revision 29, was used to prepare this CMM. The European Association of Aerospace
Industries Simplified English document PSC-85-16598, Issue 1, was also used. An
Illustrated Parts List is included as a part of the CMM.

B. The maintenance instructions are given in these sections:

- Description and Operation
- Testing and Fault Isolation
- Disassembly
- Cleaning
- Check
- Repair
- Assembly, including Storage
- Fits and Clearances
- Special Tools, Fixtures and Equipment.

C. Testing and Assembly procedures have been shop verified. The Disassembly procedures
have been verified by simulation.
D. Refer to LIEBHERR AEROSPACE LINDENBERG CMM 21-62-10 for the maintenance
instructions of the solenoid valve assembly (1-190B).

2. Measurements
A. The measurements given in this manual are taken from original manufacturing drawings.

B. All values given in this manual are in SI (Systéme International) units or subdivisions of
these units. US units are given in parenthesis immediately after the SI units.

C. Units of Measure
A Ampere psi Pound per square inch
g Gram s Second
gr grain Vdc Volt direct current
h Hecto (prefix to units)
in. Inch
k Kilo (prefix to units)
lb Pound
lbf Pound force
m Milli (prefix to units)
m Meter
N Newton
oz Ounce
Pa Pascal

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3. Abbreviations

The abbreviations given below are used in this manual:

CMM Component Maintenance Manual

D Diameter
DN Nominal Diameter
Fig. Figure
ID Inside diameter
IPL Illustrated Parts List
Max. Maximum
Min. Minimum
No. Number
OD Outside diameter
P/N Part Number
Ref. Refer to
SDA Solenoid Dummy Assembly
SVA Solenoid Valve Assembly

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DESCRIPTION AND OPERATION

1. Description

A. General
(Refer to Figure 1)

(1) The Pressure Regulating Valve (PRV) is part of the Trim Air System. It is an electro-
pneumatically operated butterfly valve. The PRV has two functions:
- To keep the downstream pressure constant at 280 hPa (4 psi) above the cabin
pressure, independently of the upstream pressure
- To isolate the hot air supply to the Trim Air System from the bleed air.

(2) The pressure regulating valve has:

- A valve housing assembly with a butterfly valve.
- A pneumatic actuator
- A microswitch assembly
- A pressure control valve with a solenoid valve assembly, a solenoid dummy assembly
and a filter assembly.

MICROSWITCH
ASSEMBLY
PNEUMATIC
ACTUATOR

ELECTRICAL
CONNECTOR

TUBE ASSEMBLY

ADJUSTMENT
BOLT
VALVE HOUSING
ASSEMBLY

SOLENOID VLAVE
ASSEMBLY

FL
OW

ELECTRICAL
CONNECTORS
FILTER ASSEMBLY
ACTUATION
SOLENOID DUMMY PRESSURE PORT
ASSEMBLY
PRESSURE CONTROL DOWNSTREAM
VALVE PRESSURE PORT

Pressure Regulating Valve

Figure 1

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B. Valve Housing Assembly

(Refer to Figure 2)

(1) The valve housing assembly is an alloy housing with a flange at each end.

(2) The butterfly is installed on the valve shaft. The butterfly turns in a bush and it has a
valve plate with a ring seal assembly. The valve shaft is installed in two bearings. The
upper end of the shaft is splined and the lower end has a lever for manual operation.
Two seal rings seal the valve shaft.

(3) A cover closes the bottom-end of the valve housing. The linkage assembly, together
with the pneumatic actuator, is installed on the top of the valve housing.

C. Pneumatic Actuator
(Refer to Figure 2)
(1) The pneumatic actuator is attached laterally to the linkage housing assembly. The
pneumatic actuator is an alloy housing which has a cover. An adjustment bolt is
installed in the cover. The housing contains a disc, a diaphragm, a retainer, a spring and
a shaft with an eye-end.

(2) The linkage assembly is an alloy housing which has a cover. The housing contains a
lever installed on the valve shaft. The lever is connected to the eye-end at the shaft of
the pneumatic actuator.

D. Microswitch Assembly
(Refer to Figure 2)

The microswitch assembly is attached laterally to the linkage assembly. It has an alloy
housing which contains a lever to operate the microswitch. The lever is spring-loaded. A
connector is attached to the side of the housing.

E. Pressure Control Valve

(Refer to Figure 2)

(1) The pressure control valve has two housings and a cover. The cover has an adjustment
bolt and a spring.

(2) One diaphragm is between the two housings and the second diaphragm is between a
housing and the cover. A plunger connects the two diaphragms together. The plunger
moves in a flanged guide.

(3) The springs in the cover and in one of the housings pre-load the diaphragms. The
diaphragms operate the poppet valve which moves in a flanged valve seat.

(4) The actuation pressure port is in the top housing and the downstream pressure port is
in the bottom housing.

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HOUSING LINKAGE ASSEMBLY

PNEUMATIC ACTUATOR SPRING EYE-END COVER LEVER SPRING HOUSING LEVER MICROSWITCH
HOUSING

RETAINER COVER
DIAPHRAGM

SHAFT

VALVE SHAFT
DISC
BEARING

COVER SEAL RING

BUTTERFLY

ADJUSTMENT
BOLT

SPRING

POPPET
VALVE
VALVE
HOUSING

HOUSING VALVE PLATE

DIAPHRAGM
SPRING SEAL RING ASSEMBLY
HOUSING PLUNGER
COVER FLANGED GUIDE ADJUSTMENT
DIAPHRAGM BOLT

Pressure Regulating Valve - Sectional View

Figure 2

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F. Solenoid Valve Assembly

(Refer to Figure 3)

(1) The solenoid valve assembly is installed on the pressure control valve. Internal bores in
the housing connect the solenoid valve assembly to the pressure control valve.

(2) The solenoid valve assembly has a body and a valve assembly. The solenoid, which
contains a core and a spring are installed into the body.

(3) The valve assembly has a valve seat, a poppet valve, a spring and a stop.

(4) The electrical connector is attached to the body.

BODY

SOLENOID

SPRING

ELECTRICAL
CONNECTOR

CORE

VALVE ASSEMBLY

POPPET VALVE
VALVE SEAT
SPRING

STOP

Solenoid Valve Assembly

Figure 3

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G. Solenoid Dummy Assembly

(Refer to Figure 4)

The solenoid dummy assembly is installed on the pressure control valve. It has a bracket
and a power resistor. The receptacle connector is attached to the bracket.

RECEPTACLE CONNECTOR

BRACKET
POWER RESISTOR

Solenoid Dummy Assembly

Figure 4

H. Filter Assembly
(Refer to Figure 5)

The filter assembly is installed on the pressure control valve. It has a body, a cover, a filter
and a union.

COVER

UNION

FILTER
BODY

Filter Assembly
Figure 5

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2. Operation
(Refer to Figure 6)

A. Regulator Mode

(1) The actuation pressure goes through the filter into the pressure control valve.

(2) When the solenoid valve is energized, the core of the solenoid valve moves into the coil
and the spring closes the solenoid valve with the ball. The pressure regulator
subsequently controls the pressure in chamber A of the pneumatic actuator which is
related to the downstream pressure.

(3) The downstream pressure goes into chamber B and to the pneumatic actuator. The air
pressure in chamber B moves the flexible diaphragms against the spring force (2) and
the cabin pressure. This movement changes the position of the plunger (3) and the
poppet valve (4).

(4) The poppet valve (4) releases the actuation pressure related to the downstream
pressure. This controls the pressure in chamber A.

(5) The pressure in chamber A pushes the flexible diaphragm against the spring force (1)
and moves the linkage. The linkage movement changes the position of the valve flap.
The change in position of the valve flap keeps the downstream pressure constant and at
280 hPa (4 psi) above the cabin pressure.

B. Shut-off Mode

(1) When the solenoid valve is de-energized, the valve moves to the open position. This
releases the air pressure in chamber A. The spring (1) subsequently closes the valve
flap and shuts off the flow of the trim air to the system.

(2) The microswitch shows the valve fully closed position.

3. Technical Data
Dimensions:
- Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229 mm (9.0 in.)
- Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219 mm (8.6 in.)
- Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144 mm (5.6 in.)
- Nominal diameter: . . . . . . . . . . . . . . . . . . . . . . . . . . 76.2 mm (3.0 in.)

Pneumatic connections:
- Actuation pressure port . . . . . . . . . . . . . . . . MS 33514E5
- Downstream pressure port . . . . . . . . . . . . . MS 33514E6

Electrical connections:
- Microswitch assembly (1-140) . . . . . . . . . . . SOURIAU receptacle 8525-02H8B3APW
- Resistor bridge assembly (1-190) . . . . . . . . SOURIAU receptacle 8525-02H8B3APNH
- Solenoid-valve assembly (1-220) . . . . . . . . SOURIAU receptacle 8525-02H8B3APX

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SOLENOID VALVE SPRING

(SHOWN ENERGIZED)
VENT
C B A BALL VENT
FILTER

ACTUATION
CORE PRESSURE
POPPET VALVE (4)
COIL VENT DOWNSTREAM
RESISTOR PRESSURE

SOLENOID
DUMMY

A B C PLUNGER
(3)
VENT
CHAMBER B

TEST PORT SPRING (2)

PNEUMATIC
ACTUATOR
ADJUSTMENT BOLT
CHAMBER A

SPRING (1)
MICROSWITCH (CLOSED POSITION)

A
B
C

HOT AIR
DOWNSTREAM

LINKAGE

Pressure Regulating Valve - Schematic

Figure 6

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Weight: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2450 ±50 g (86.42 ±1.76 oz)

Medium: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Compressed air

Supply pressure: . . . . . . . . . . . . . . . . . . . . . . 0 to 4400 hPa (0 to 63.82 psi)

Adjusted control pressure: . . . . . . . . . . . . . . . 280 hPa (4.06 psi)

Operating time:
(Closing from full open position). . . . . . . . . . . 3±0.5 s max.

Operating temperature: . . . . . . . . . . . . . . . . . -55 to 260°C (-67 to 500°F)

Electrical supply of the solenoid valves:. . . . . 28 +4

–11 Vdc

Electrical consumption: . . . . . . . . . . . . . . . . . 0.4 A max. at 28 Vdc

Electrical supply of the microswitch:. . . . . . . . 5 Vdc

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TESTING AND FAULT ISOLATION

4. General

A. This section gives the procedures necessary to test the PRV and the procedures necessary
to find the cause if a failure occurs.

B. The necessary ambient conditions for the test procedures are:

- Ambient temperature: 23 ±10°C (73 ±18°F)
- Relative humidity: 50 ±30%
- Atmospheric pressure 960 +66 +1.0
–93 hPa (14 –1.3 psi).

C. The pressure values given in the test procedures are gauge pressure values.

D. If not specified, use these tolerances for the general test conditions during this adjustment/
test procedures:
- Pressure ±2.5%
- Air flow ±5.0%
- Temperature ±20°C (±36°F).

E. Refer to the IPL to find the correct parts when replacement is necessary.

F. Refer to Table 101 for symbols used in this section.

SYMBOL LEGEND SYMBOL LEGEND

R BLANKED FLANGE
CONTROL VALVE
/DAMMY FLANGE

p1 SUPPLY PRESSURE
PRESSURE GAUGE p2 DOWNSTREAM PRESSURE
p3 PROOF PRESSURE
p4 ACTUATOR PRESSURE
p5 ACTUATION PRESSURE
TEMPERATURE GAUGE

FLOWMETER T1 SUPPLY AIR TEMPERATURE

T3 HOUSING TEMPERATURE
T5 ACTUATION PRESSURE SUPPLY AIR
SWITCH TEMPERATURE

Symbols used in Test Figures

Table 101

5. Additional Equipment and Items

A. Special Tools

Refer to Page Block 901 for tools and test equipment.

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B. Additional Equipment Necessary

(1) A pressure supply as follows:

- Filtered compressed air
- 0 to 4200 hPa (0 to 60,9 psi) supply pressure (p1)
- 0 to 3000 hPa (0 to 43.5 psi) control pressure (p5)
- 0 to 300 g/s (0 to 10.6 oz/s) mass flow
- 20 to 215°C (68 to 419°F) air temperature (T1)
- ≤26 g/kg air (≤0.41 oz/lb air) humidity.

(2) A pressure supply for the proof pressure test as follows:

- Filtered compressed air
- 0 to 6200 hPa (0 to 90 psi) supply pressure
- 20°C (68°F) air temperature

(3) A 28 Vdc power supply for the Test Box (52234A1000-01).

C. Measuring Instruments

The necessary measuring instruments are given in Table 102.

Accuracy
Test Section Parameter to be Unit and Min.
Instrument Class 0.6
Ref. No. Measured Test Range
and Range

Pressure gauge 6.C., 7.E., 7.F., 7.H. to Supply pressure (p1) 0 to 2150 hPa (0 to 31.2 psi) ±20 hPa (±0.3 psi)
7.P. 5000 hPa (70 psi)

Pressure gauge 7.D. Proof pressure (p3) 0 to 6200 hPa (0 to 90 psi) ±30 hPa (±0.4 psi)
10000 hPa (150 psi)

Pressure gauge 6.C., 7.E. to 7.G., 7.I. Downstream pressure 0 to 450 hPa (0 to 6.53 psi) ±3 hPa (±0.04 psi)
to 7.K., 7.M. to 7.O. (p2) 1000 hPa (15 psi)
and 7.Q.

Pressure gauge 6.B., 6.C., 7.C., 7.G., Downstream pressure 0 to 500 hPa (0 to 7.25 psi) ±3 hPa (±0.04 psi)
7.I., 7.M.to 7.Q. (p2), actuator 1000 hPa (15 psi)
pressure (p4) or
actuation pressure
(p5)

Pressure gauge 6.C., 7.C. to 7.G., 7.I. Actuation pressure 0 to 3000 hPa (0 to 43.5 psi) ±30 hPa (±0.4 psi)
to 7.O. (p5) 5000 hPa (70 psi)

Flowmeter 6.C., 7.E., 7.F., 7.H., Mass flow 0 to 300 g/s (0 to 10.6 oz/s) ±5% of indication
7.I. to 7.O.

Flowmeter 7.P. and 7.Q. Leakage 0 to 2.0 g/s (0 to 0.07 oz/s) ±2% of indication

Measuring Instruments
Table 102 (Sheet 1 of 2)

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Accuracy
Test Section Parameter to be Unit and Min.
Instrument Class 0.6
Ref. No. Measured Test Range
and Range

Flowmeter 7.H. Internal leakage 0 to 5.0 g/s (0 to 0.18 oz/s) ±2% of indication

Stop watch 7.J. and 7.N. Closing time 0 to 3 s ±0.5 s

Temperature 6.C., 7.D. to 7.F., 7.H. Air supply temperature 10 to 30°C (50 to 86°F) ±5°C (±9°F)
gauge to 7.L., 7.P. and 7.Q.

Temperature 7.M. to 7.O. Housing temperature 180°C (356°F) ±5°C (±9°F)

gauge

Temperature 7.M. to 7.O. Supply air temperature 20 to 215°C (68 to 419°F) ±5°C (±9°F)
gauge

Bonding Meter 7.B. Resistance 0 to 20 mΩ ±1 mΩ

Measuring Instruments
Table 102 (Sheet 2 of 2)

D. Additional Test Items

Additional test items and equipment necessary are given in Table 103.

Name Part Number Quantity Vendor Code Vendor Name and Address

V clamps P/N BA25412-9 2 K8319 BESTOBELL AVIATION

127/135 Farnham Road
Slough, Berks SL 1 4UY
United Kingdom

Addition Test Items and Equipment

Table 103

6. Adjustment Procedure

A. Valve Flap Adjustment

NOTE: Do this adjustment procedure only when:
- Complete disassembly of the PRV or of the pneumatic actuator was necessary
- The valve flap position is not correct, refer to Para. 7.C.

(1) If installed, remove one retaining ring (3-110) and the manual lever (3-100) from the
valve shaft (3-250).

(2) Measure the dimensions X and Y as shown in Figure 101. The dimension X and Y must
have the same value ±0.1 mm (±0.004 in.).

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VALVE SHAFT VALVE PLATE VALVE PLATE BUSH

(3-250) (3-90) (3-90) (3-30)

Y
Y
SYMMETRICAL

SYMMETRICAL
71.7 mm (2.82 in.)
X
X

HOUSING
(3-300) VALVE SHAFT
MEASURING PIN
∅ 2 mm (∅ 0.079 in.) (3-250)

Valve Flap Position

Figure 101
(3) If the dimensions are not in the limit, loosen the nut (1-40) and turn the bolt (1-50) into
the bolt (1-80) as necessary to get the correct dimensions, then tighten the nut.

(4) Attach the Angle Measuring Fixture (53042A0000-01) to the installed cover (3-160) and
attach the coupling to the valve shaft (3-250). Connect the Potentiometer to the Pack-
Acceptance Test-Set (52271B0000-01).

(5) Set the external potentiometer to 0°.

(6) Loosen the nut (1-40) and turn the bolt (1-50) into the bolt (1-80) to get a valve flap
position of 1.0 ±0.5°.

(7) Torque the nut (1-40) to 2.5 ±0.3 Nm (22.1 ±2.65 lbf in.).

(8) Prepare the test set-up as shown in Figure 102.

(9) Energize the solenoid valve assembly (1-230).

(10) Pressurize the actuation pressure port to (p5) ≤800 hPa (≤11.6 psi).
NOTE: If you cannot pressurize the actuation pressure port (p5), adjust the bolt (4-290)
of the pressure control valve (1-280) as necessary.

(11) Remove the electrical power from the solenoid valve assembly (1-230) and then
energize the solenoid valve assembly again, to open and close the PRV. Do this 10
times. Make sure that the actuator pressure (p4) during the pressurization is ≤800 hPa
(≤11.6 psi).

(12) Make sure that the valve flap position is 1.0 ±0.5°.

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B. Adjustment of the Microswitch Assembly

(1) Prepare the test set-up as shown in Figure 102 and make sure that the position of the
valve flap is correct, refer to Para. 6.A.

PACK ACCEPTANCE
ANGLE MEASURING FIXTURE TEST SET
(53042A0000-01) (52271B0000-01)

VALVE ANGLE INDICATION

VALVE
ACTUATION INLET (DN 3“)
PRESSURE p5
VALVE
OUTLET (DN 3“)
SDA
AIR SUPPLY p2
p5 = 0 TO 500 hPa DN 1/4“
p5
(0 TO 7.25 psi) DN 1/4“ SVA
T1 = 20 ±18˚C (68 ±18˚F) TEST BOX
(52234A1000-01)

p4 SOLENOID VALVE
ACTIVATION AND INDICATION

DN 1/4“ MICROSWITCH
ACTIVATION AND INDICATION

ACTUATOR U = 28 Vdc
PRESSURE p4

Adjustment of the Microswitch Assembly

Figure 102

(2) Energize the solenoid valve assembly (1-230) with 28 Vdc.

(3) Pressurize the actuation pressure port (p5) to get an actuator pressure of (p4) ≈600 h
Pa (≈8.7 psi).

(4) Slowly decrease the actuator pressure (p4) until the microswitches operate. Make sure
that the microswitches operate at a valve flap position of 3 ±0.5°. If the microswitches
operate at an incorrect valve flap position:

(a) Loosen the screws (1−150 and 1-160) and adjust the microswitch assembly (1-140)
as necessary.

(b) Torque the screws (1-150 and 1-160) to 1 ±0.1 Nm (8.85 ±0.88 lbf in.).

(c) After the microswitch adjustment do steps (3) and (4) again.

(5) If the microswitches operate correctly, decrease the pressure to zero.

(6) De-energize the solenoid valve assembly (1-230) and the microswitch assembly
(1−140).

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C. Adjustment of the Pressure Control Valve

(1) Prepare the test set-up as shown onFigure 103 .

PACK ACCEPTANCE
ANGLE MEASURING FIXTURE
(53042A0000-01) TEST SET
(52271B0000-01)
5 DN MAX.
VALVE ANGLE INDICATION
4 DN MAX.
DN 1/4“
PRV INLET 200 TO 400 mm
CONTROL VALVE
PRESSURE p1 (7.9 TO 15.7 in.)

TEMPERATURE DOWNSTREAM
FLOWMETER m1
(T1) PRESSURE p2
AIR SUPPLY DN 1/4“
p1 = 0 TO 1500 hPa R
(0 TO21.8 psi) SDA DN 1/4“
p2
MASS FLOW
m1 = 1 TO 100 g/s p5 DN 3“
(0.035 TO 3.53 oz/s) DN 3“
SVA
VALVE
T1 = 20 ±18˚C (68 ±18˚F) OUTLET (DN 3“)

DN 1/4“ VALVE
INLET TEST BOX
AIR SUPPLY p4
(DN 3“) (52234A1000-01)
p5 = 0 TO 2500 hPa
(0 TO 36.3 psi) DN 1/4“ SOLENOID VALVE
T5 = 20 ±18˚C (68 ±18˚F)
ACTIVATION AND INDICATION

ACTUATION U = 28 Vdc MICROSWITCH

PRESSURE p5 ACTIVATION AND INDICATION

Adjustment of the Pressure Control Valve

Figure 103

(2) Energize the solenoid valve assembly (1-230) with 28 Vdc.

(3) Pressurize the actuation pressure port to (p5) 2500 h Pa (36.3 psi).

(4) Pressurize the valve inlet to (p1) 1500 hPa (21.75 psi) at a flow rate of (m1) 100 g/s
(3.50 oz/s) at a temperature of (T1) 20 ±10°C (68 ±18°F).
(5) Loosen the nut (4-300) and release the bolt (4-290) a small number of turns, then adjust
the bolt as necessary to get a downstream pressure of 280 ±10 hPa (4.06 ±0.145 psi).

(6) Torque the nut (4-300) to 1 Nm (8.85 lbf in.). Make sure the bolt (4-290) stays in the
adjusted position.

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7. Test Procedure

A. Visual Inspection

Examine the PRV and make sure all parts are correctly installed and there is no external
damage. Make sure that the PRV agrees with the related build standard.

B. Bonding Test

Do a bonding test between:

- The ground plate (4-280) and the connector housing of the solenoid valve assembly
(1-230)
- The ground plate (4-280) and the connector housing of the solenoid-dummy assembly
(1-190)
- The ground plate (4-280) and the connector housing of the microswitch assembly (1-140).

The resistance must be ≤20 mΩ.

PACK ACCEPTANCE TEST SET

(52271B0000-01)
ANGLE MEASURING FIXTURE
(53042A0000-01)
VALVE ANGLE INDICATION

200 TO 400 mm
V-CLAMP (BA25412-9) (7.9 TO 15.7 in.)
SOLENOID DUMMY
ASSEMBLY (SDA)
(8525-02H8B3APNH)
DOWNSTREAM PRESSURE DN 3“ V-CLAMP
PORT p2 DN 3“(BA25412-9)
(MS 33514 E4) VALVE OUTLET
SDM-FLANGE
SDA DN 80 DOWNSTREAM
PRESSURE p2
VALVE INLET DN 80 p2
SDM-FLANGE
SUPPLY PRESSURE p1 p5 SOLENOID VALVE
SUPPL TEMPERATURE T1 SVA ASSEMBLY (SVA)
(8525-02H8B3APX)

ACTUATION PRESSURE PORT p5

(MS 33514 E6) TEST BOX
P4
(52234A1000-01)
MICROSWITCH ASSEMBLY
(8525-02H8B3APW) SOLENOID VALVE U = 28 Vdc
ACTIVATION AND INDICATION
ACTUATOR PRESSURE PORT p4 MICROSWITCH
(MS33656G4) ACTIVATION AND INDICATION

Mechanical Test Set-up

Figure 104

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C. Test of the Valve Flap Position

(Bench Test)

(1) If not installed, install the Angle Measuring Fixture (53042A0000-01) as follows:

(a) If not removed, remove one of the retaining rings (3-110) and the manual lever
(3-100).

(b) Attach the Angle Measuring Fixture (53042A0000-01) to the cover (3-160) and
attach the coupling to the valve shaft (3-250).

(c) Connect the potentiometer to the Pack-Acceptance Test-Set (52271B0000-01).

(2) Measure dimension X and Y as shown on Figure 105.

VALVE SHAFT VALVE PLATE VALVE PLATE BUSH

(3-250) (3-90) (3-90) (3-30)

Y
Y
SYMMETRICAL

SYMMETRICAL
71.7 mm (2.82 in.)

X
X

HOUSING
(3-300) VALVE SHAFT
MEASURING PIN
∅ 2 mm (∅ 0.079 in.) (3-250)

Test of Valve Flap Position

Figure 105

(3) Calculate the difference between the dimensions X and Y and find the applicable valve
flap angel in Table 104.

(4) Make sure that the valve flap position is 1.0 ±0.5°. If the valve flap angel is not correct,
do the valve flap adjustment, refer to Para. 6.A.

(5) Set the potentiometer indication at the Pack-Acceptance Test-Set (52271B0000-01) to

the valve flap angel found in Table 104.
(6) Prepare the test set-up as shown in the Figure 106.

(7) Energize the solenoid valve assembly (1-230).

(8) Pressurize the actuation pressure port (p5) and then decrease the pressure to zero, to
open and close the PRV. Do this five times. Make sure that the actuator pressure (p4) is
≤800 hPa (≤11.6 psi).

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Difference Valve Flap Difference Valve Flap Difference Valve Flap

between X and Y Angle between X and Y Angle between X and Y Angle
0.6 mm (0.024 in.) 0.48° 1.1 mm (0.043 in.) 0.88° 1.7 mm (0.067 in.) 1.36°
0.63 mm (0.025 in.) 0.50° 1.2 mm (0.047 in.) 0.96° 1.8 mm (0.071 in.) 1.44°
0.7 mm (0.027 in.) 0.56° 1.3 mm (0.051 in.) 1.04° 1.87 mm (0.074 in.) 1.50°
0.8 mm (0.031 in.) 0.64° 1.4 mm (0.055 in.) 1.12° 1.9 mm (0.075 in.) 1.52°
0.9 mm (0.035 in.) 0.72° 1.5 mm (0.059 in.) 1.20°
1.0 mm (0.039 in.) 0.80° 1.6 mm (0.063 in.) 1.28°

Valve Flap Angel

Table 104

PACK ACCEPTANCE
ANGLE MEASURING FIXTURE TEST SET
(53042A0000-01) (52271B0000-01)

VALVE ANGLE INDICATION

VALVE
ACTUATION INLET (DN 3“)
PRESSURE p5
VALVE
OUTLET (DN 3“)
SDA
AIR SUPPLY p2
p5 = 0 TO 800 hPa DN 1/4“
p5
(0 TO 11.6 psi) DN 1/4“ SVA
T1 = 20 ±18˚C (68 ±18˚F) TEST BOX
(52234A1000-01)

p4 SOLENOID VALVE
ACTIVATION AND INDICATION

DN 1/4“ MICROSWITCH
ACTIVATION AND INDICATION

ACTUATOR U = 28 Vdc
PRESSURE p4

Valve Flap Position Test Set-up

Figure 106
(9) Make sure that the valve flap position is 1.0 ±0.5°.

(10) De-energize the solenoid valve assembly (1-230).

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D. Proof Pressure Tests

WARNING: BEFORE YOU TEST THE PRV AT HIGH PRESSURE, MAKE SURE YOU USE THE
APPLICABLE SAFETY SHIELDS AND PROTECTIVE CLOTHING. PRESSURIZED
SYSTEMS ARE DANGEROUS.

(1) Proof Pressure Test - Valve Flap Opened

NOTE: Leakage at the sound absorber is permitted.

(a) Prepare the test set-up as shown in Figure 107.

5DN MAX. VALVE INLET
(DN 3“) VALVE OUTLET (CLOSED)
PROOF 4DN MAX.
(DN 3“)
PRESSURE p3

AIR SUPPLY TEMPERATURE (T3)

p3 = 0 TO 3720 hPa
(0 TO 53.95 psi) TEST BOX
SDA
T3 = 20 ±10˚C DN 1/4“ (52234A1000-01)
p2
(68 ±18˚F) DN 1/2“ p5
(p2) OPEN SOLENOID VALVE SUPPLY
SVA
ACTUATION ACTIVATION AND INDICATION
AIR SUPPLY PRESSURE p5
DN 1/4“
p5 = 0 TO 3000 hPa
p4
(0 TO 43.5 psi)
T1 = 20 ±10˚C U = 28 Vdc
(68 ±18˚F) DN 1/4“

VALVE FLAP OPEN

Proof-Pressure Test Set-up

Figure 107

(b) Energize the solenoid valve assembly (1-230) with 28 Vdc.

(c) Pressurize the actuation pressure port to (p5) 3000 hPa (43.5 psi).
(d) Pressurize the valve inlet to (p3) 3700 hPa (53.66 psi) at a temperature of (T3)
20 ±10°C (68 ±18°F) for two minutes.

(e) Decrease the pressure to (p3) 1000 hPa (14.5 psi).

(f) Use a spray gun to apply a solution of soap and water to the PRV.

(g) Examine the PRV and make sure there is no external leakage, cracks or damage.
The subsequent conditions are permitted:
- Bubbles that are not near each other, on the surface of the cast housing (3-300)
- A small quantity of leakage from the free end of the valve shaft (3-250).
NOTE: The total leakage must be in the limit as given in the external leakage test,
refer to Para 7. H.

(h) Decrease the pressure to zero.

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(i) De-energize the solenoid valve assembly (1-230).

(2) Proof Pressure Test - Valve Flap Closed

NOTE: 1. Leakage at the sound absorber is permitted.
2. Do not operate the solenoid valve assembly (1-230) during this test.

(a) Prepare the test set-up as shown in Figure 108.

5DN MAX.
VALVE INLET
(DN 3“)
PROOF 4DN MAX.
PRESSURE p3
VALVE OUTLET (OPEN)
TEMPERATURE (T3) (DN 3“)

AIR SUPPLY
p3 = 0 TO 4200 hPa SDA
DN 1/4“
p2
(0 TO 61 psi)
DN 1/2“
T3 = 20 ±10˚C p5

(68 ±18˚F) (p2 AND p5) OPEN SVA

p4
VALVE FLAP CLOSED

Proof-Pressure Test Set-up

Figure 108

(b) Pressurize the valve inlet to (p3) 4200 hPa (60.9 psi) at a temperature of (T3)
20 ±10°C (68 ±18°F) for two minutes.

(c) Decrease the pressure to (p3) 1000 hPa (14.5 psi).

(d) Use a spray gun to apply a solution of soap and water to the PRV.

(e) Examine the PRV and make sure there is no external leakage, cracks or damage.
Bubbles that are not near each other, on the surface of the cast housing (3-300) are
permitted.

(f) Decrease the pressure to zero.

(3) Proof Pressure Test of the Pressure Control Valve

(a) Prepare the test set-up as shown in Figure 109.

CAUTION: DO NOT PRESSURIZE THE DOWNSTREAM PRESSURE PORT (P2).

(b) Pressurize the actuation pressure port to (p5) 6200 hPa (89.92 psi) at a
temperature of (T5) 20 ±10°C (68 ±18°F) for two minutes.
(c) Decrease the pressure to (p5) 1000 hPa (14.5 psi).

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VALVE INLET VALVE OUTLET (OPEN)

(DN 3“) (DN 3“)
ACTUATION
PRESSURE p5

AIR SUPPLY SDA

p2
p5 = 0 TO 6200 hPa DN 1/4“
(0 TO 90 psi) p5

T1 = 20 ±10˚C DN 1/4“ SVA

(68 ±18˚F) TEMPERATURE (T5)

p4

Test Set-up Proof Pressure Test - Pressure Control Valve

Figure 109
(d) Use a spray gun to apply a solution of soap and water to the pressure control valve
(1-280). Make sure there is no external leakage, cracks or damage.

(e) Decrease the pressure to zero.

E. Running-in

(1) Prepare the test set-up as shown in Figure 110.

PRV INLET DN 1/4“ DOWNSTREAM

PRESSURE p1 PRESSURE p2

MAX. 5 DN 200 TO 400 mm

(7.9 TO 15.7 in.)
MAX.4 DN
DN 1/4“ DN 1/4“
AIR SUPPLY
p1 = 0 TO 2150 hPa R
(0 TO 31.2 psi) SDA
p2
MASS FLOW
m1 = 1 TO 300 g/s p5 DN 3“
(0.035 TO 10.582 oz/s) DN 3“
SVA VALVE OUTLET
T1 = 20 ±18˚C (68 ±18˚F) (DN 3“)

VALVE INLET
p4
(DN 3“) TEST BOX
AIR SUPPLY (52234A1000-01)
p5 = 0 TO 3000 hPa DN 1/4“
(0 TO 43.5 psi) SOLENOID VALVE
T1 = 20 ±18˚C (68 ±18˚F) VALVE FLAP ACTIVATION AND INDICATION
OPEN
DN 1/4“
MICROSWITCH
ACTUATION U = 28 Vdc ACTIVATION AND INDICATION
PRESSURE p5

Running-in Test Set-up

Figure 110

(2) Energize the solenoid valve assembly (1-230) with 28 Vdc.

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(3) Pressurize the actuation pressure port (p5) to 2500 hPa (36.26 psi) and pressurize the
valve inlet to (p1) 1500 hPa (21.75 psi) at a flow rate of (m1) 100 g/s (3.50 oz/s) at a
temperature of (T1) 20 ±10°C (68 ±18°F).
(4) Remove the electrical supply and then energize the solenoid valve assembly (1-230) to
operate the valve flap. Do this 25 times. Make sure that:
- The solenoid valve function is correct
- The valve flap operates smoothly
- The microswitch indicates the closed position.

(5) Decrease the pressure to zero.

(6) De-energize the solenoid valve assembly (1-230).

F. Test of the Pressure Control-Valve Adjustment

(1) If necessary, prepare the test set-up as shown in Figure 110.

(2) Energize the solenoid valve assembly (1-230) with 28 ±1 Vdc.

(3) Pressurize the actuation pressure port (p5) to 2500 hPa (36.26 psi).

(4) Pressurize the valve inlet to (p1) 1500 hPa (21.75 psi) at a flow rate of (m1) 100 g/s
(3.50 oz/s) at a temperature of (T1) 20 ±10°C (68 ±18°F).
(5) Measure the downstream pressure (p2). Make sure that the downstream pressure (p2)
is 280 ±10 hPa (4.06 ±0.14 psi). If the downstream pressure (p2) is incorrect:

(a) Loosen the nut (4-300) and adjust the bolt (4-290) as necessary to get a
downstream pressure of 280 ±10 hPa (4.06 ±0.14 psi), then tighten the nut.

(b) Torque tighten the nut (4-300) to 1 Nm (8.85 lbf in.) after final adjustments.

(6) Decrease the pressures to zero.

(7) De-energize the solenoid valve assembly (1-230).

G. Test of the Microswitch Adjustment

(Bench Test)

(1) Make sure that the Angle Measuring Fixture (53042A0000-01) is installed, refer to
Para 7.C.

(2) Prepare the test set-up as shown in Figure 106.

(3) Connect the microswitch assembly (1-140) to the Test Box (52234A1000-01).

(4) Energize the solenoid valve assembly (1-230) with 28 ±1 Vdc.

(5) Pressurize the actuation pressure port (p5) to ≈600 h Pa (≈8.7 psi).

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(6) Slowly decrease the actuation pressure (p5) until the microswitch operates. Make sure
that the microswitch operates at a valve flap position of 3 ±0.5°. If the microswitch
operates at an incorrect valve flap position:

(a) Loosen the screws (1-150 and 1-160) and adjust the microswitch as necessary.

(b) Torque the screws (1-150 and 1-160) to 1 ±0.1 Nm (8.8 ±0.9 lbf in.).

(c) After the microswitch adjustment do the steps (5) thru (7) again.

(7) If the microswitch operates correctly, decrease the pressure to zero.

(8) De-energize the solenoid valve assembly (1-230).

H. Internal Leakage Test

(Bench Test)

(1) Make sure that the Angle Measuring Fixture (53042A0000-01) is installed, refer to
Para 7.C.

(2) Prepare the test set-up as shown in Figure 111.

(3) Make sure the valve flap is in the closed position.

PACK ACCEPTANCE
TEST SET
(52271B0000-01)
TEMPERATURE (T1) PRV INLET
PRESSURE p1 VALVE ANGLE INDICATION
PRV INLET
PRESSURE p1
FLOWMETER m1

AIR SUPPLY
p1 = 0 TO 2150 hPa SDA
DN 1/4“
p2
(0 TO 31.2 psi)
T1 = 20 ±10˚C p5
DN 1/2“
(68 ±18˚F) SVA

VALVE INLET
(DN 3“) VALVE OUTLET (OPEN)
(DN 3“)
p4

PRV CLOSED

Internal Leakage Test Set-up

Figure 111

(4) Make sure that the solenoid valve assembly (1-230) is de-energized.

(5) Pressurize the valve inlet to (p1) 2150 hPa (31.2 psi) at a temperature of (T1) 20 ±10°C
(68 ±18°F).

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(6) Measure the internal leakage. The leakage must be ≤4.0 g/s (≤0.14 oz/s).
NOTE: 1. We recommend that you repair the PRV, if the internal leakage is ≥3.0 g/s
(≥0.11 oz/s), refer to Para. 6. Fault isolation.
2. The leakage value is related to the standard ambient condition.

(7) Measure the valve flap position. Make sure that the valve flap position is ≤2°.

(8) Decrease the pressure to zero.

I. Closing Function Test

(1) Make sure that the Angle Measuring Fixture (53042A0000-01) is installed to the PRV,
refer to Para 7. C.

(2) Prepare the test set-up as shown in Figure 112.

ANGLE MEASURING FIXTURE

PACK ACCEPTANCE
(53042A0000-01) TEST SET
(52271B0000-01)
5 DN MAX.
VALVE ANGLE INDICATION
4 DN MAX.

PRV INLET DN 1/4“ 200 TO 400 mm

CONTROL VALVE
PRESSURE p1 (7.9 TO 15.7 in.)

TEMPERATURE DOWNSTREAM
FLOWMETER m1
(T1) PRESSURE p2
AIR SUPPLY DN 1/4“
p1 = 0 TO 2800 hPa R
(0 TO 40.6 psi) SDA DN 1/4“
p2
MASS FLOW
m1 = 1 TO 100 g/s p5 DN 3“
(0.035 TO 3.53 oz/s) DN 3“
SVA
VALVE
T1 = 20 ±18˚C (68 ±18˚F) OUTLET (DN 3“)

DN 1/4“ VALVE
INLET TEST BOX
AIR SUPPLY p4
(DN 3“) (52234A1000-01)
p5 = 0 TO 3200 hPa
(0 TO 46.4 psi) DN 1/4“ SOLENOID VALVE
T1 = 20 ±18˚C (68 ±18˚F)
ACTIVATION AND INDICATION

ACTUATION MICROSWITCH
PRESSURE p5 ACTIVATION AND INDICATION
ACTUATOR
PRESSURE p4

U = 28 Vdc
VALVE FLAP
OPEN

Closing Function Test Set-up

Figure 112

(3) Energize the solenoid valve assembly (1-230) with 28 ±1 Vdc.

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(4) Pressurize the actuation pressure port (p5) to 3200 hPa (46.4 psi)

(5) Pressurize the to (p1) 2800 hPa (40.6 psi) at a flow rate of (m1) 100 g/s (3.50 oz/s) at a
temperature of (T1) 20 ±10°C (68 ±18°F).
(6) Stabilize the pressure and the flow, then remove the electrical power from the solenoid
valve assembly (1-230) and make sure:
- The solenoid valve assembly (1-230) operates
- The valve flap position is ≤2°
- The actuator pressure (p4) is ≤110 hPa (≤1.6 psi)
- The downstream pressure (p2) is ≤450 hPa (≤6.53 psi).

(7) Decrease the pressure to zero.

(8) Remove the electrical power from the microswitch assembly (1-140).

J. Closing Time Test

(1) If necessary, prepare the test set-up as shown in Figure 113.

PRV INLET 5 DN MAX.
PRESSURE p1 DN 1/4“ 200 TO 400 mm
4 DN MAX. CONTROL VALVE
(7.9 TO 15.7 in.)

TEMPERATURE DOWNSTREAM
FLOWMETER m1
(T1) PRESSURE p2
AIR SUPPLY DN 1/4“
p1 = 0 TO 2150 hPa R
(0 TO 31.2 psi) SDA DN 1/4“
p2
MASS FLOW
m1 = 1 TO 100 g/s p5 DN 3“
(0.035 TO 3.53 oz/s) DN 3“
SVA
VALVE
T1 = 20 ±18˚C (68 ±18˚F) OUTLET (DN 3“)

DN 1/4“ VALVE
INLET p4
TEST BOX
AIR SUPPLY (DN 3“) (52234A1000-01)
p5 = 0 TO 3000 hPa
(0 TO 43.5 psi) DN 1/4“ SOLENOID VALVE
ACTIVATION AND INDICATION

ACTUATION U = 28 Vdc MICROSWITCH

PRESSURE p5 ACTIVATION AND INDICATION

Closing Time Test Set-up

Figure 113

(2) Energize the solenoid valve assembly (1-230) with 28 ±1 Vdc.

(3) Pressurize the actuation pressure port to (p5) 3000 hPa (43.5 psi).

(4) Pressurize the valve inlet to (p1) 2150 hPa (31.2 psi) at a flow rate of (m1) 100 g/s
(3.5 oz/s) at a temperature of (T1) 20 ±10°C (68 ±18°F).

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(5) Let the pressure and the flow become stable.

(6) De-energize the solenoid valve assembly (1-230) and at the same time measure the
closing time. (the time between power off and when the microswitch indication comes
on). Make sure that the closing time is <3 s.

(7) Remove the electrical power from the microswitch assembly (1-140).

(8) Decrease the pressure to zero.

K. Friction Test “cold”

(Bench Test)

(1) Make sure that the Angle Measuring Fixture (53042A0000-01) is attached to the PRV,
refer to Para 7. C.

(1) Prepare the test set-up as shown in Figure 114.

(2) Energize the solenoid valve assembly (1-230) with 28 ±1 Vdc.

(3) Make sure that the valve flap is closed.

(4) Pressurize the valve inlet to (p1) 2800 hPa (40.6 psi).

(5) Slowly pressurize the actuation pressure port (p5) to increase the actuator pressure
(p4) until the valve flap has a position of 2 +0.5°. Make sure that the actuator pressure
(p4) is ≤450 hPa (≤6.53 psi).

(6) Decrease the pressure to zero.

(7) De-energize the solenoid valve assembly (1-230).

L. Normal Function Test

(1) Prepare the test set-up as shown in Figure 114.

(2) Energize the solenoid valve assembly (1-230) with 28 Vdc.

(3) Pressurize the actuation pressure port (p5) to 3000 hPa (43.5 psi).

(4) Pressurize the valve inlet to (p1) 2150 hPa (31.2 psi) at a flow rate of (m1) 10 g/s
(0.35 oz/s) at a temperature of (T1) 20 ±10°C (68 ±18°F).
(5) Make sure that the downstream pressure (p2) is between 280 and 325 hPa (4.06 and
4.71 psi).

(6) Decrease the actuation pressure to (p5) 1300 hPa (18.85 psi).

(7) Decrease the supply pressure (p1) to 1300 hPa (18.85 psi) at a flow rate of (m1) 300 g/s
(10.6 oz/s) at a temperature of (T1) 20 ±10°C (68 ±18°F).

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PRV INLET
MAX. 5 DN
PRESSURE p1 DN 1/4“ DOWNSTREAM
MAX.4 DN PRESSURE p2

FLOWMETER m1 200 TO 400 mm

TEMPERATURE (7.9 TO 15.7 in.) CONTROL VALVE
(T1)
DN 1/4“ DN 1/4“
AIR SUPPLY
p1 = 0 TO 2150 hPa R
(0 TO 31.2 psi) SDA
p2
MASS FLOW
m1 = 1 TO 300 g/s p5 DN 3“
(0.035 TO 10.582 oz/s) DN 3“
SVA VALVE OUTLET
T1 = 20 ±18˚C (68 ±18˚F) (DN 3“)

VALVE INLET
p4
TEST BOX
(DN 3“) (52234A1000-01)
AIR SUPPLY
p5 = 0 TO 3000 hPa DN 1/4“ SOLENOID VALVE
(0 TO 43.5 psi) ACTIVATION AND INDICATION
T1 = 20 ±18˚C (68 ±18˚F) VALVE FLAP
OPEN
DN 1/4“ SOLENOID DUMMY
ACTIVATION
ACTUATION U = 28 Vdc
PRESSURE p5 MICROSWITCH
ACTIVATION AND INDICATION

Normal Function Test Set-up

Figure 114
(8) Make sure that the downstream pressure (p2) is between 200 and 280 hPa (2.90 and
4.06 psi).

(9) Decrease the pressure to zero.

(10) De-energize the solenoid valve assembly (1-230).

M. Working Temperature - Friction Test

(1) Make sure that the Angle Measuring Fixture (53042A0000-01) is attached to the PRV,
refer to Para 7. C.

(2) Remove the pressure seal cap (1-20) from the connector (1-70) and prepare the test
set-up as shown in Figure 115.

(3) Heat the PRV as follows:

(a) Energize the solenoid valve assembly (1-230) with 28 ±1 Vdc.

(b) Pressurize the actuation pressure port to (p5) 1300 hPa (18.9 psi).

(c) Pressurize the valve inlet to (p1) 1300 hPa (18.9 psi) at a flow rate of (m1) 300 g/s
(10.6 oz/s) at a temperature of (T1) 215 -15°C (419 -27°F).

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ANGLE MEASURING FIXTURE

(53042A0000-01) PACK ACCEPTANCE
TEST SET
(52271B0000-01)
HOUSING
TEMPERATURE T3 VALVE ANGLE INDICATION

PRV INLET
5 DN MAX.
PRESSURE p1 DN 1/4“ 200 TO 400 mm
CONTROL VALVE
4 DN MAX. (7.9 TO 15.7 in.)

DOWNSTREAM
FLOWMETER m1 TEMPERATURE
(T1) PRESSURE p2
AIR SUPPLY DN 1/4“
p1 = 0 TO 1300 hPa
(0 TO 18.9 psi) R
SDA DN 1/4“
MASS FLOW p2

m1 = 1 TO 150 g/s p5 DN 3“
(0.035 TO 5.3 oz/s) DN 3“
SVA VALVE
T1 = 215 −15°C OUTLET (DN 3“)
(419 −27°F)
DN 1/4“ VALVE
INLET TEST BOX
AIR SUPPLY p4
(DN 3“) (52234A1000-01)
p5 = 0 TO 1300 hPa
(0 TO 18.9 psi) DN 1/4“ SOLENOID VALVE
T5 = 20 ±18°C (68 ±18°F)
ACTIVATION AND INDICATION

ACTUATION MICROSWITCH
PRESSURE p5 ACTIVATION AND INDICATION
ACTUATOR
PRESSURE p4

U = 28 Vdc

Working Temperature Test Set-up

Figure 115
(d) When the housing temperature (T3) is at 180 ±10°C (356 ±18°F), let the housing
temperature become stable for 15 minutes.

(4) Check the friction as follows:

(a) Decrease the pressure at the actuation pressure port (p5) to zero. Make sure that
the pressure (p1) is at 1300 hPa (18.9 psi).

(b) Slowly increase the actuation pressure (p5) until the valve flap has a position of
2 ±0.5°. Make sure that the actuator pressure (p4) is ≤450 hPa (≤6.53 psi).

(c) Open and close the valve flap through 50 switch cycles of the solenoid valve
assembly (1-230).

(d) Do steps (a) and (b) again.

(5) Decrease the pressure to zero.

(6) De-energize the solenoid valve assembly (1-230).

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N. Working Temperature - Closing Time Test

NOTE: Do this test only if a high temperature problem has occurred or indicated.

(1) If necessary, prepare the test set-up as shown in Figure 115 and heat the PRV as given
in Para. 7.M.(3).

(2) Energize the solenoid valve assembly (1-230) with 28 ±1 Vdc.

(3) Energize the microswitch assembly (1-140) with 5 ±0.5 Vdc.

(4) Pressurize the actuation pressure port to (p5) 3000 hPa (43.5 psi).

(5) Pressurize the valve inlet to (p1) 2150 hPa (31.2 psi) at a flow rate of (m1) 100 g/s
(3.50 oz/s) at a temperature of (T1) 215 -15°C (419 -27°F).
(6) Let the pressure and the flow become stable.

(7) De-energize the solenoid valve assembly (1-230) and measure the closing time of the
valve flap between the removal of the electrical power and the operation of the
microswitch assembly (1-140). Make sure that the closing time is ≤3 s.

(8) Decrease the pressure to zero.

(9) De-energize the microswitch assembly (1-140).

O. Working Temperature - Function Test

(1) If necessary, prepare the test set-up as shown in Figure 115 and heat the PRV as given
in Para. 7.M.(3).

(2) Energize the solenoid valve assembly (1-230) with 28 ±1 Vdc.

(3) Energize the microswitch assembly (1-140) with 5 ±0.5 Vdc.

(4) Pressurize the actuation pressure port to (p5) 2500 hPa (36.3 psi).
(5) Pressurize the valve inlet to (p1) 1500 hPa (21.8 psi) at a flow rate of (m1) 100 g/s
(3.50 oz/s) at a temperature of (T1) 215 -15°C (419 -27°F).
(6) Make sure that the downstream pressure (p2) is between 250 and 295 hPa (3.63 and
4.28 psi).

(7) Decrease the temperature of the PRV as follows:

(a) Make sure that the solenoid valve assembly (1-230) is energized with 28 ±1 Vdc.
(b) Decrease the pressure at the actuation pressure port to (p5) 1300 hPa (18.9 psi).

(c) Pressurize the valve inlet to (p1) 1300 hPa (18.9 psi) at a flow rate of (m1) 300 g/s
(10.6 oz/s) at a temperature of (T1) 215 -15°C (419 -27°F).
(d) Let the housing temperature decrease to (T3) 20 ±20°C (68 ±36°F).

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(8) Decrease the pressure to zero.

(9) De-energize the solenoid valve assembly (1-230) and remove the electrical supply from
the microswitch assembly (1-140).

(10) Remove the pressure sensor from the connector (1-70).

(11) Install the pressure seal cap (1-20) on the connector (1-70) and torque the pressure
seal cap to 5 ±0.3 Nm (44 ±2.6 lbf in.).

P. External Leakage Test - Ring Seal (3-240)

(1) Prepare the test set-up as shown in Figure 116.

SUPPLY PRESSURE
PRESSURE p1 p1 AND p5

VALVE INLET VALVE OUTLET

TEMPERATURE (T1) (DN 3“)
(DN 3“)
DN 1/4“ DN 1/4“
AIR SUPPLY
SDA
p1 = 0 TO 1000 hPa BLANKED FLANGE
p2
(0 TO 14.5 psi)
DN 1/2“ p5
T1 = 20 ±18˚C (68 ±18˚F) DN 1/4“ SVA

FLOWMETER m1

p4
TEST BOX
(52234A1000-01)
VALVE FLAP
OPEN SOLENOID VALVE
ACTIVATION AND INDICATION

U = 28 Vdc MICROSWITCH
ACTIVATION AND INDICATION

External Leakage Test Set-up

Figure 116

(2) Pressurize the valve inlet and the actuation pressure port to (p1, p5) 1000 hPa
(14.5 psi) at a temperature of (T1) 20 ±10°C (68 ±18°F).
(3) Use a spray gun to apply a solution of soap and water to the PRV.

(4) Measure the external leakage at the valve inlet. Make sure that the external leakage is
≤0.2 g/s (≤0.007 oz/s).
NOTE: Leakage at the sound absorber is permitted.

(5) Decrease the pressure to zero.

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Q. External Leakage Test - Downstream Pressure

(1) Prepare the test set-up as shown in Figure 117.

SUPPLY PRESSURE VALVE OUTLET

PRESSURE p2 p2 (DN 3“)

VALVE INLET OPEN

TEMPERATURE (T2) DOWNSTREAM
(DN 3“)
PRESSURE p2
DN 1/4“ DN 1/4“
AIR SUPPLY
p2 = 0 TO 500 hPa SDA AIR SUPPLY
(0 TO 7.25 psi) p2 p2 = 0 TO 500 hPa
DN 1/2“ (0 TO 7.25 psi)
T2 = 20 ±18˚C DN 1/4“
p5
T2 = 20 ±18˚C
(68 ±18˚F) SVA
(68 ±18˚F)
FLOWMETER m2

ACTUATION PRESSURE PORT OPEN p4

TEST BOX
(52234A1000-01)
VALVE FLAP
CLOSED SOLENOID VALVE
ACTIVATION AND INDICATION

U = 28 Vdc MICROSWITCH
ACTIVATION AND INDICATION

External Leakage - Downstream-Pressure Test Set-up

Figure 117

(2) Pressurize the valve outlet and the downstream pressure port to (p2) 500 hPa (7.25 psi)
at a temperature of (T1) 20 ±10°C (68 ±18°F). During pressurization, use a spray gun to
apply a solution of soap and water to the PRV.

(3) Make sure there is no damage and external leakage at:

- Port 2
- The actuator housing
- The connection between the pressure control valve and the pneumatic actuator.

(4) Measure the external leakage at the downstream pressure port (p2). Make sure that the
external leakage is ≤0.2 g/s (≤0.007 oz/s).

(5) Decrease the pressure to zero and remove the PRV from the test set-up.

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8. Test Procedure of the Solenoid Dummy Assembly

(Refer to Figure 118)
NOTE: Only do this test for fault isolation and as a check of the solenoid dummy assembly
(1-190).

A. Additional Equipment and Items

The necessary measuring instruments are given in Table 105.

Test Section Unit and Min.

Instrument Parameter to be Measured Accuracy
Ref. No. Test Range

Bonding Meter 8.C. Bonding resistance 0 to 20 mΩ ±1 mΩ

Ohmmeter 8.D. Coil resistance 0 to 1010 Ω

Insulation Tester 8.E. Insulation resistance 0 to 45 Vdc

Measuring Instruments
Table 105

B. Visual Inspection

Examine the solenoid dummy assembly (1-190) and make sure all parts are correctly
installed and there is no external damage.

C. Bonding Test

Do a bonding test between pin C of the receptacle connector (5-10) and the screw (5-30)
(bonding position). The resistance must be <20 mΩ.

D. Resistance Test
Measure the resistance of the coil between pin A and pin B. Make sure that the resistance is
between 990 and 1010 Ω.

E. Insulation Test

Supply 45 Vdc between pin A and pin C and then between pin B and pin C. Make sure that
the resistance is >20 MΩ at each position.
POWER RESISTOR (5-70)

RECEPTACL CONNECTOR (5-10)

A B C

Wiring Diagram of the Solenoid Dummy Assembly

Figure 118

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9. Test Procedure of the Solenoid Valve Assembly

A. Additional Equipment and Items

(1) Refer to Page Block 901 for tools and test equipment.

(2) Additional test items and equipment:

(a) Pressure Supply:

- Medium Compressed air
- Pressure 1000 hPa (14.5 psi)
- Mass Flow 1 g/s (0.035 oz/s)
- Air temperature 10 to 50°C (50 to 122°F).

(b) Electrical Supply:

- Voltage 0 to 28 Vdc
- Current ≤0.4 A.

(c) One preformed packing, P/N MS9068-011.

(d) One preformed packing, P/N MS9068-014.

(e) The necessary measuring instruments are given in Table 106.

Test Section Ref. Parameter to be Unit and Min.

Instrument Accuracy
No. Measured Test Range

Pressure Gauge 9.F. and G. Supply pressure 0 to 2000 hPa (0 to 29 psi) ± 10 hPa
(±0.15 psi)

Flowmeter 9.F. Flow rate 0.1 to 1.0 g/s (0.0035 to Class 1.6
0.0353 oz/s)

Flowmeter 9.G. Leakage 0.001 to 0.010 g/s (0.015 Class 1.6

to 0.154 gr/s)

Temperature Gauge 9.F. and G. Air temperature 10 to 50°C (50 to 122°F) ±5°C (±9°F)

Bonding Meter 9.C. Bonding resistance 0 to 20 mΩ ±1 mΩ

Ohmmeter 9.D. Coil resistance 0 to 73 Ω

Insulation Tester 9.E. Insulation resistance 0 to 45 Vdc

Measuring Instruments
Table 106

B. Visual Inspection

Examine the solenoid valve assembly and make sure all parts are correctly installed and
there is no external damage.

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C. Bonding Test
(Refer to Figure 119)

Do a bonding test between pin C of the receptacle connector and the body of the solenoid
valve assembly. The resistance must be <20 mΩ.
COIL OF THE SOLENOID (6-80)

RECEPTACL CONNECTOR

A B C

Wiring Diagram of the Solenoid Valve Assembly

Figure 119

D. Resistance Test
(Refer to Figure 119)

Measure the resistance of the coil between pin A and pin B. Make sure that the resistance is
between 62 and 73 Ω.

E. Insulation Test
(Refer to Figure 119)

Supply 45 Vdc between pin A and pin C and then between pin B and pin C. Make sure that
the resistance is >20 MΩ at each position.

F. Flow Test

(1) Install the preformed packing (MS9068-014) on the solenoid valve assembly (1-230).

(2) Attach the solenoid valve assembly (1-230) to the Test Block (52347A0123-02).

(3) Prepare the test set-up as shown in Figure 120. Use a flowmeter with a range between
0.1 and 1.0 g/s (0.0035 and 0.0353 oz/s).

(4) Pressurize port C of the solenoid valve assembly (1-230) to 1000 hPa (14.5 psi) at a
temperature to 20 ±10°C (68 ±18°F).

(5) Operate the solenoid valve assembly (1-230) 20 times with the switch.

(6) De-energize the solenoid valve assembly (1-230) and measure the flow rate. Make sure
that the flow rate is ≥0.8 g/s (≥12.3 gr/s).

(7) Decrease the pressure to zero.

G. Leakage Test

(1) Prepare the test set-up as shown in Figure 120. Use a flowmeter with a range between
0.001 and 0.010 g/s (0.015 and 0.154 gr/s).

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PLUG
(ASNE0052R8B3ASNF)
-
POWER SUPPLY
28 Vdc (MIN. 0.4 A)
+

A B C SOLENOID VALVE
ASSEMBLY (1-230)
(ENERGIZED)
PORT R

CONTROL SUPPLY PREFORMED PACKING

VALVE (MS9068-014)
PRESSURE (p1)

AIR SUPPLY
R
p1 = 0 TO 1000 hPa
(0 TO 14.5 psi)
T1 = 30 ±20˚C
(86 ±36˚F)
FLOWMETER m1
PORT C
(R1/4 in.)
PORT P
TEST BLOCK (R1/4 in.)
(52347A0123-02)

Leakage and Flow Test Set-up

Figure 120
(2) Energize the solenoid valve assembly (1-230) with 28 ±1 Vdc.

(3) Pressurize port C to 1000 hPa (14.5 psi) at a temperature of 20 ±10°C (68 ±18°F).

(4) Measure the leakage. Make sure that the leakage is ≤2 mg/s (≤0.031 gr/s).

(5) Decrease the pressure to zero.

(6) Remove the solenoid valve assembly (1-230) from the test set-up.

(7) Remove the four screws (NAS1131E18) and the solenoid valve assembly (1-230) from
the Test Block (52396A0000-01).

(8) Remove the preformed packing (MS9068-014) from the solenoid valve assembly (1-
240).

H. Visual Inspection

Examine the solenoid valve assembly and make sure there is no external damage.

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10. Microswitch Test Procedure

NOTE: Only do this test for fault isolation and as a check of the microswitch assembly (1-140).

A. Insulation Resistance Test

(1) Use an insulation tester to supply 45 Vdc between pin A and pin B of the connector.
Make sure that the resistance is >100 MΩ.

(2) Operate the microswitch assembly (1-140) with your hand and use an insulation tester
to supply 45 Vdc between pin A and pin C of the connector. Make sure that the
resistance is >100 MΩ.

(3) Use an insulation tester to supply 45 Vdc between each of the pins A and B and the
ground area at the housing. Make sure that the resistance is >100 MΩ.

11. Fault Isolation

These procedures let you quickly find a failure or defect of the PRV. Refer to Page Block - 301
DISASSEMBLY to find the minimum disassembly necessary to repair the defect.

DEFECT POSSIBLE CAUSE CORRECTION

Test of the PRV

7.B. Bonding Test

The bonding test results are out The bonding between the test points is not Make sure there is sufficient bonding
of tolerance good contact

7.C. Test of the Valve Flap Position

(1) The valve flap does not The seal ring assembly (3-80) is caught in Disassemble the valve flap and clean
move freely its groove and/or replace the parts

(2) The valve flap is not in the The valve flap is not correct adjusted Adjust the valve flap as given in
correct position Para 6.A.

7.D. Proof Pressure Tests

External leakage (a) The preformed packings, the gaskets, Replace the damaged parts
the diaphragms, the seal rings (3-150
and 3-240), the housings or the covers
are damaged

(b) The screws, the bolts, the nuts, the Torque the parts to the correct value,
caps or the connections are not refer to Page Block 801, Table 802
correctly tightened

Fault Isolation
Table 107 (Sheet 1 of 5)

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DEFECT POSSIBLE CAUSE CORRECTION

7.E. Running-in

(1) The PRV does not operate (a) The valve flap is incorrectly adjusted Adjust the valve flap as given in
correctly Para 6.A.

(b) The pressure control valve (1-280) is in- Adjust the valve flap as given in
correctly adjusted or defective Para 6.C. or repair it

(c) The solenoid valve assembly (1-230) is Repair or replace the defective
defective solenoid valve assembly

(d) The diaphragm (2-220) is damaged Replace the damaged diaphragm

(e) The eye-end (2-180) is twisted in the Adjust the eye-end until there is free
lever (2-70) movement

(f) The filter (7-40) is blocked Replace the blocked filter

(2) The valve flap does not (a) The Molybdenum-Disulphide coating of Repair the bush, refer to Page Block
operate smoothly the bush (3-30) is damaged 601, Para 4.B. or replace the
damaged bush

(a) The seal ring assembly (3-80) is dirty or Clean the seal ring assembly or
damaged replace it

(b) The ball-bearings (3-130 and 3-220) Clean the ball bearings or replace
are damaged or dirty them

(c) The eye-end (2-180) is twisted in the Adjust the eye-end until there is free
lever (2-70) movement

7.F. Test of the Pressure Control-Valve Adjustment

The downstream pressure is out (a) The Pressure control valve (1-280) is Adjust the pressure control valve as
of tolerance incorrectly adjusted or defective given in Para 6.C.
Clean and/or replace the worn parts
as necessary

(b) The solenoid valve assembly (1-230) is Clean, repair or replace the defective
defective solenoid valve assembly

7.G. Test of the Microswitch Adjustment

The microswitch assembly (a) The microswitch assembly is Adjust the microswitch assembly as
(1-140) does not operate or incorrectly adjusted or defective given in Para 6.B., repair or replace it
operates at an incorrect valve-
flap position

Fault Isolation
Table 107 (Sheet 2 of 5)

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DEFECT POSSIBLE CAUSE CORRECTION

(b) The lever (8-20) does not move freely Clean the microswitch assembly
(1- 140) and/or replace the damaged
parts

(c) The electrical connector, the Do the microswitch test procedure,

microswitch or the electrical wires are refer to Para. 10. or replace it
damaged

7.H. Internal Leakage Test

(1) The internal leakage is out The bush (3-30) or the seal ring assembly Clean the valve flap and the seal ring
of tolerance (3-80) is worn and out of tolerance assembly. Replace worn parts as
necessary

(2) The valve flap is not at the The seal ring assembly (3-80) does not Clean the valve plate (3-90) and/or
correct position move freely in its groove replace the seal ring assembly

7.I. Closing Function Test

The Closing function is incorrect (a) The valve flap is damaged or dirty Clean or replace the damaged parts

(b) The pressure control valve (1-280) is Replace the damaged parts or adjust
damaged or incorrectly adjusted the pressure control valve as given in
Para 6.C.

(c) The eye-end (2-180) is twisted in the Adjust the eye-end until there is free
lever (2-70) movement

7.J. Closing Time Test and 7.N. Working Temperature - Closing Time Test

The closing time is out of (a) The bearings (3-130 or 3-220), the seal Replace the damaged parts
tolerance ring assembly (3-80), the bush (3-30)
or the spring (2-240) are damaged

(b) The seal ring assembly (3-80) held in Clean the valve flap and the seal ring
the bush (3-30) assembly. Replace the worn parts as
necessary.

7.K. Friction Test “cold” and 7.M. Working Temperature - Friction Test

The valve flap friction is out of (a) The bearing (3-130 and 3-220), the Replace the damaged parts and
tolerance seal ring assembly (3-80) or the bush adjust the eye-end until there is free
(3-30) are damaged or the eye-end movement in the lever
(2-180) is twisted in the lever (2-70)

(b) The seal ring assembly (3-80) held in Clean the valve plate (3-90) and the
the bush (3-30) seal ring assembly (3-80). Replace
worn parts as necessary.

Fault Isolation
Table 107 (Sheet 3 of 5)

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DEFECT POSSIBLE CAUSE CORRECTION

7.L. Normal Function Test and 7.O. Working Temperature - Function Test

The pressure at the valve output (a) The pressure control valve (1-280) is adjust the pressure control valve as
is out of tolerance incorrectly adjusted or defective given in Para 6.C. or replace the
damaged parts

(b) The leakage of the solenoid valve Repair or replace the damaged
assembly (1-230) is too much solenoid valve assembly

(c) Friction of the plunger and the poppet Clean the plunger, the poppet valve
valve in the pressure control valve and the flanged guides or renew the
(1-280) damaged parts

7.P. External Leakage Test - Ring Seal (3-240) and 7.Q. External Leakage Test - Downstream Pressure

The external leakage is out of (a) The preformed packings, the Replace the damaged parts
tolerance diaphragms, the gaskets, the tube
assemblies, the housing or the seal
rings (3-150 or 3-240) are damaged

(b) The screws, the bolts, the nuts, the Torque the parts to the correct value,
caps or the connections are not refer to Page Block 801, Table 802
correctly tightened

Test Procedure of the Solenoid Dummy Assembly

8.C. Bonding Test

The bonding test result is out of The bonding between the test points is not Make sure there is sufficient bonding
tolerance good contact

8.D. Resistance Test

The resistance test result is out The power resistor (5-70) is damaged Replace the damaged power resistor
of tolerance

8.E. Insulation Test

The insulation resistance is too The wires have defective insulation Replace the defective wires
low

Test Procedure of the Solenoid Valve Assembly

9.C. Bonding Test

The bonding test result of the The wires of the connector are damaged Replace the damaged solenoid
solenoid valve assembly is out of assembly (1-230)
tolerance

Fault Isolation
Table 107 (Sheet 4 of 5)

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DEFECT POSSIBLE CAUSE CORRECTION

9.D. Resistance Test

The coil resistance is out of The coil of the solenoid (6-80) is damaged Replace the damaged solenoid
tolerance

9.E. Insulation Test

The insulation resistance is too The wires have defective insulation Replace the defective solenoid valve
low assembly (1-230)

9.F. Flow Test

The flow-rate is out of tolerance (a) The free-play of the poppet valve (6-50) Adjust the free play, refer to Page
is too small Block 701, Para 4.A.

(b) The solenoid (6-80) or the springs (6-40 Replace the damaged parts
or 6-70) are damaged

9.G. Leakage Test

The leakage is out of tolerance The valve seat (6-60), the springs (6-40 or Replace the damaged parts
6-70) or the solenoid (6-80) are damaged

Fault Isolation
Table 107 (Sheet 5 of 5)

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DISASSEMBLY

1. General

A. This section gives the procedures for the disassembly of the PRV. Complete disassembly is
not usually necessary. Refer to Page Block 101 - TESTING AND FAULT ISOLATION to find
the disassembly necessary to replace or repair a component.

B. Only replace items which are damaged or defective.

C. Refer to Page Block 901 for SPECIAL TOOLS FIXTURES AND EQUIPMENT.

D. Discard all the cotter pins, gaskets, self-locking nuts and spring shims on removal.

E. Remove the locking wire and the protective caps from the PRV.

2. Procedure

A. Removal of the Solenoid Valve Assembly

(Refer to Figure 301)

(1) Remove the screws (1-240) from the pressure control valve (1-280).

(2) Remove the solenoid valve assembly (1-230) from the pressure control valve (1-280).

(3) Remove the preformed packing (1-250) from the solenoid valve assembly (1-230).

(4) Remove the thermofit sleeve (1-260) from the solenoid valve assembly (1-230), only if it
is damaged.

1-230
1-240

1-260
1-250
1-390

1-280

Removal of the Solenoid Valve Assembly

Figure 301

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B. Removal of the Solenoid Dummy Assembly or the Solenoid Valve Assembly

(1) Refer to Figure 302. Remove the solenoid dummy assembly (1-190A) as follows:

(a) Remove the screws (1-200A) from the pressure control valve (1-280).

(b) Remove the solenoid dummy assembly (1-190A) from the pressure control valve
(1-280).

(c) Use one screw (1-200) to remove the plug (1-220) from the pressure control valve
(1-280).

(d) Remove the preformed packing (1-210) from the plug (1-220).

1-200A

1-390
1-220B
1-190A 1-210

1-280
Removal of the Solenoid Dummy Assembly
Figure 302

(2) Refer to Figure 303. Remove the solenoid valve assembly (1-190B) as follows:

(a) Remove the screws (1-200B) from the pressure control valve (1-280).

(b) Remove the solenoid valve assembly (1-190B) from the pressure control valve
(1-280).
1-190B
1-200B

1-225

1-215
1-390 1-210

1-280

Removal of the Solenoid Valve Assembly (1-190B)

Figure 303

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(c) Remove the preformed packings (1-210A and 1-215) from the solenoid valve
assembly (1-190B).

(d) Remove the thermofit sleeve (1-225) from the solenoid valve assembly (1-190B)
only if it is damaged.

C. Disassembly of the Filter Assembly

(Refer to Figure 304)

(1) Remove the cover (7-10) from the body (7-60).

(2) Remove the filter (7-40) from the body (7-60), then remove the preformed packing
(7-30) from the filter.

(3) Remove the union (7-90) and the body (7-60) from the pressure control valve (1-280).

(4) Remove the preformed packings (7-70 and 7-80) from the union (7-90) and the
preformed packings (7-20 and 7-50) from the body (7-60).

7-10

7-40

7-30
7-20

7-60

7-90
7-50

7-70
7-80

Disassembly of the Filter Assembly

Figure 304

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D. Removal of the Microswitch Assembly

(Refer to Figure 305)

(1) Remove the screws (1-150 and 1-160) together with the washers (1-170) from the
pneumatic actuator assembly (1-370).

(2) Remove the microswitch assembly (1-140) and the gasket (1-180) from the pneumatic
actuator assembly (1-370).

1-370

1-140
1-180

...... ....
..
............
.....
1-390

1-170
1-170 1-160
1-150

Removal of the Microswitch Assembly

Figure 305

E. Removal of the Tube Assemblies

(Refer to Figure 306)

(1) Loosen the nuts of the tube assembly (1-10) and then remove the tube assembly (1-10)
from the pressure control valve (1-280) and the connector (1-70).

(2) Remove the pressure seal cap (1-20) from the connector (1-70).

(3) Loosen the nut (1-40) and remove the bolt (1-50) and the thread seal (1-30).

(4) Remove the nut (1-40) from the bolt (1-50).

(5) Remove the bolt (1-80), the bonded seals (1-60) and the connector (1-70) from the
pneumatic actuator assembly (1-370).

(6) Loosen the nuts of the tube assembly (1-90) and remove the tube assembly from the
pipe adaptor (1-100) and the pressure control valve (1-280).

(7) Remove the screws (1-110), the washers (1-120), the pipe adaptor (1-100) and the
gasket (1-130) from the pneumatic actuator assembly (1-370).

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1-130 1-110
1-120
1-380 1-370 .... .... ..... ....
. . 1-100
..... ..

1-360
1-350

1-60
1-70
1-60

1-20

1-80
1-30 1-10 1-380
1-50 1-40 3-170
4-270

4-260 1-300 1-90

1-290
1-310

1-340
4-410

4-20
4-30

1-320 4-10
1-280
4-410
4-40

1-410 1-340
1-330

Disassembly of the Pressure Regulating Valve

Figure 306

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F. Removal of the Pressure Control Valve

(Refer to Figure 306)

(1) Make sure that the filter assembly (1-270) and the tube assemblies (1-10 and 1-90) are
removed from the pressure control valve (1-280), refer to Paras. C. and E.

(2) Remove the union (4-10) together with the union (4-30) from the pressure control valve
(1-280).

(3) Remove the preformed packings (4-20 and 4-40) and the union (4-30) from the union
(4-10).

(4) Remove the screw (4-260) and the washer (4-270) which holds the bonding jumper
(3-170) to the pressure control valve (1-280).

(5) Remove the cotter pins (1-290), the nuts (1-300), the washers (1-310 and 1-320) and
the bolts (1-330), then remove the pressure control valve (1-280) from the pneumatic
actuator assembly (1-370).

(6) Remove the bushes (4-410) from the pressure control valve (1-280).

(7) Remove the flanged bushes (1-340) from the housing (3-300).

G. Removal of the Identification Plate

(Refer to Figure 306)

Remove the screws (1-360) and the identification plate (1-350) from the pneumatic actuator
assembly (1-370).
NOTE: Only remove the identification plate (1-350) if it is damaged and you cannot read the
data, or if it is necessary to add new data. Keep the identification plate (1-350) until
the data are put on a new plate.

H. Disassembly of the Linkage Assembly

(Refer to Figure 307)

(1) Remove the screws (2-20) and the washers (2-30) from the valve housing assembly
(2-340).

(2) Lift off the cover (2-10) and remove the gasket (2-40) from the housing (2-330).

(3) Remove the locking wire from the bolts (2-50 and 2-80).

(4) Remove the bolt (2-50) and the washer (2-60) from the lever (2-70).

(5) Turn the valve shaft (3-250) to the open position and remove the washers (2-100).

(6) Loosen the bolt (2-80) and remove the lever (2-70) from the valve shaft.

(7) Remove the bolt (2-80) and the washer (2-90) from the lever (2-70).

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2-220
2-230

2-140

2-200 2-20

2-30

2-10
...........
. ...... 2-40
...... .... ..........
2-50 . ..........
2-160
2-170 2-180 2-100
2-60
2-190
2-70
2-270 2-110
2-280 2-90
2-100 2-120 2-80

2-190
2-290 2-330
2-250
..
2-210 ... .....
.
... . ...... . ......
2-260
2-280 ....... ...... 2-130
.......... .
3-120
2-240 2-160
2-150

2-340

Disassembly of the Pneumatic Actuator Assembly

Figure 307

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(8) Remove the screws (2-110), the washers (2-120) and the housing (2-330) together with
the actuator assembly from the valve housing assembly (2-340).

(9) Remove the gasket (2-130) from the valve housing assembly (2-340).

(10) Remove the distance sleeve (3-120) from the valve housing assembly (2-340).

I. Disassembly of the Pneumatic Actuator

(Refer to Figure 308)

(1) Hold the pneumatic actuator assembly together with the housing (2-330) in a vice.

WARNING: REMOVE THE COVER (2-140) CAREFULLY, BECAUSE IT IS UNDER PRESSURE

FROM THE SPRING (2-240).

(2) Loosen any two nuts (2-150) opposite each other on the housing (2-250) and the cover
(2-140). Do not remove the nuts from the screws (2-170).

(3) Remove all the other screws (2-170), the nuts (2-150) and the washers (2-160) from the
housing (2-250) and the cover (2-140).

(4) Use an applicable tool, that will not damage the diaphragm (2-220) or the cover to
disconnect the cover (2-140) from the housing (2-250).

(5) Push the cover (2-140) against the spring force of the housing (2-250) and remove the
remaining two nuts (2-150), the washers (2-160) and the screws (2-170) from the
housing and the cover.

(6) Remove the cover (2-140) together with the assembled items (2-180 thru 2-230) from
the housing (2-250).

(7) Remove the spring (2-240) from the housing (2-250).

(8) Loosen one nut (2-190), then remove the eye-end (2-180) and the nut from the shaft
(2-200).

(9) Remove the second nut (2-190) from the shaft (2-200).

(10) Remove the retainer (2-210), the diaphragm (2-220) and the disc (2-230) from the shaft
(2-200).

(11) Remove the screws (2-260), the nuts (2-270), the washers (2-280), the housing (2-250)
and the gasket (2-290) from the housing (2-330).

J. Removal of the Valve Flap

(Refer to Figure 308)

(1) Remove the nuts (3-50), the washers (3-60) and the screws (3-70) from the valve plate
(3-90).

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(2) Remove the valve plate (3-90) together with the ring seal assembly (3-80) from the
housing bore.

(3) Remove the ring seal assembly (3-80) from the valve plate (3-90).

(4) Remove the locking bolt (3-10) and the preformed packing (3-20) which holds the bush
(3-30) in the housing (3-300).

(5) Turn the valve flap with the manual lever (3-100) to the open position.

(6) Use the Extractor (56528S0000) to remove the bush (3-30) from the housing bore.

(7) Remove the preformed packing (3-40) from the housing bore and discard the preformed
packing.

K. Disassembly of the Valve Housing

(Refer to Figure 308)

(1) Remove the retaining rings (3-110) and the manual lever (3-100) from the valve shaft
(3-250).

(2) Remove the screws (3-180), the bonding jumper (3-170), the washers (3-190) and the
cover (3-160) from the housing (3-300).

(3) Remove the spring shims (3-200) and the shim (3-210) from the housing bore.

CAUTION: DO NOT APPLY TOO MUCH FORCE TO THE VALVE SHAFT WHEN YOU REMOVE
IT. YOU CAN BUCKLE THE VALVE SHAFT IF YOU USE TOO MUCH FORCE.

(4) Carefully push the valve shaft (3-250) down and away from the housing (3-300), then
remove the ball bearing (3-220), the washer (3-230) and the ring seal (3-240).

(5) Use the valve shaft (3-250) to remove the ball bearing (3-130), the washer (3-140) and
the ring seal (3-150) from the housing (3-300).

L. Removal of the Sound Absorber

(Refer to Figure 308)

(1) Remove the sound absorber (3-270) and the fitting (3-260) only if they are damaged.

(2) Remove the remaining Silicone Silastic 732 RTV.

M. Disassembly of the Pressure Control Valve

(Refer to Figure 309)

(1) If damaged, loosen the nut (4-300) and remove the bolt (4-290) and the washer (4-310)
from the cover (4-240), then remove the nut from the bolt.

(2) Remove the screws (4-250 and 4-260), the washers (4-270) and the ground plate
(4-280) which hold the cover (4-240).

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3-260

3-130 3-270

3-140 DETAIL A

3-150

3-10
3-20

3-40

3-30
3-300

3-240

3-70 3-250
3-230

3-220
3-90
3-200
3-80
3-210

3-200 3-60
3-160 3-50

3-190 3-100
3-170 3-110
3-110
3-190
3-180

Disassembly of the Valve Housing Assembly

Figure 308

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(3) Remove the cover (4-240), the spring retainer (4-320), the spring (4-330), the
diaphragm (4-340) and the plunger (4-350) from the housing (4-450).

(4) Remove the screws (4-370) and the washers (4-380) which hold the flanged guide
(4-360).

(5) Remove the fixed bleed plug (4-400) from the housing (4-450).

(6) Remove the screws (4-60) and the plate (4-50) from the housing (4-140).

(7) Remove the screws (4-80 and 4-90) and the washers (4-100) which hold the housing
(4-140).

(8) Remove the housing (4-140), the diaphragm (4-150) and the poppet valve (4-160) from
the housing (4-450).

(9) Remove the screws (4-180) and the washers (4-190) which hold the valve seat (4-170).

(10) Remove the valve seat (4-170) from the housing (4-140) and remove the preformed
packing (4-200) from the valve seat.

(11) Remove the spring retainer (4-210) and the spring (4-220) from the housing (4-140).

(12) Remove the fixed bleed plug (4-230) from the housing (4-140).

(13) Remove the flanged guide (4-360) from the housing (4-450)

(14) Remove the preformed packing (4-390) from the flanged guide (4-360).

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4-400

4-450

4-390
4-380
4-360
4-370

4-350

4-90

4-100 4-60
4-340
4-50

4-330
4-140
4-320
4-240
4-80 4-230
4-100
4-270
4-220
4-260 4-310
4-210
4-200 4-190 4-280 4-300

4-170 4-180
4-290
4-250
4-160

4-150

Disassembly of the Pressure Control Valve

Figure 309

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N. Disassembly of the Solenoid Dummy Assembly

(Refer to Figure 310)

(1) Remove the nut (5-40), the washer (5-50) and the terminal lug (5-60) from the screw
(5-30).

(2) Remove the screws (5-20) and the screw (5-30) from the bracket (5-160).

(3) Lift the receptacle connector (5-10) and remove the thermofit sleeves (5-100).

(4) Remove the screws (5-80), the washers (5-90) and the power resistor (5-70) from the
bracket (5-160).

(5) Remove the thermofit sleeves (5-110) from the power resistor (5-70).

(6) De-solder the wires (5-120) from the power resistor (5-70).
5-140 5-120
5-110

5-90
5-80

5-70

5-120
5-110

5-100 5-120

5-40
5-50
5-60

5-150

5-10
5-160

5-20
5-150

5-30
Disassembly of the Solenoid Dummy Assembly
Figure 310

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O. Disassembly the Solenoid-Valve Assembly

(Refer to Figure 306)

(1) Hold the solenoid valve assembly in a vise.

(2) Remove the stop (6-30).

(3) Remove the spring (6-40) and the poppet valve (6-50) from the valve seat (6-60).

(4) Remove the screws (6-20) from the solenoid (6-80).

(5) Remove the valve seat (6-60), the core (6-90) and the spring (6-70) from the solenoid
(6-80).

6-80

6-70

6-90

6-60

6-20 6-50
6-10
6-40

6-30

Disassembly of the Solenoid Valve Assembly

Figure 311

P. Disassembly the Microswitch Assembly

Refer to Para. 4.Para. C. for the repair of the microswitch assembly (1-140).

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CLEANING

WARNING: 1. OBEY ALL SAFETY AND HEALTH PRECAUTIONS DURING CLEANING

PROCEDURES.
2. TURCO SOLV LO IS DANGEROUS. DO NOT BREATHE THE GAS. DO NOT USE IT
IN CLOSED AREAS.
3. TURCO SOLV LO IS A SKIN IRRITANT, USE PVC-GLOVES THAT GIVE
PROTECTION OR A BARRIER CREAM. CLEAN IMMEDIATELY WITH CLEAN
WATER IF IT GETS ON YOUR SKIN.
4. PREVENT CONTACT OF TURCO SOLV LO WITH EYES AND SKIN.
5. DO NOT USE TURCO SOLV LO NEAR FIRE SOURCES OR SMOKE WHILE IN USE.
THE CLEANER IS HIGHLY FLAMMABLE.

CAUTION: USE ONLY SPECIFIED MATERIALS AND SOLUTIONS OR APPROVED

ALTERNATIVES. THE SURFACE PROTECTION CAN BE DAMAGED IF UNAPPROVED
MATERIALS WHICH ARE NOT APPROVED. OBEY THE MANUFACTURERS
INSTRUCTIONS.

A. Cleaning materials and suppliers are given at the front of this manual in the List of Materials.
NOTE: You can use approved alternatives.

B. If the cleaned parts are not examined immediately, protect the parts from damage and
corrosion.

1. Cleaning of Assembly Parts

A. Remove the larger pieces of dirt, oil or Vaseline Brisal OX 50-855 from the parts with the
Ethyl Alcohol and an abrasive pad (SCOTCH BRITE).

B. Use the ultrasonic procedure, or hand clean with Turco Solv LO and a soft-bristle brush to
clean the metal parts, but not the housing assembly (4-140) and the housing assembly with
installed absorber (3-270).

CAUTION: DO NOT DRY THE UNION (4-10) WITH COMPRESSED AIR. THIS WILL HELP PREVENT
DAMAGE TO THE FILTER INTO THE UNION (4-10).

C. Use a lint-free cloth or clean, dry compressed air to dry the parts.

D. Hand clean the housing assembly (4-140) and the housing assembly with the installed
absorber (3-270) with Turco Solv LO and an abrasive pad (SCOTCH BRIGHT).
NOTE: The housing assembly (4-140) has a LEE-plug.

2. Cleaning of Electrical Parts

Clean electrical parts with a cloth made moist with Ethyl Alcohol.

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3. Cleaning of New Parts

A. Fully clean the new parts and remove all preservation material.

B. Make sure that the bores and the connections are clean and clear.

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CHECK

1. General

This section gives the check procedure for parts and assemblies.

2. Procedures

A. Design Changes

Refer to the IPL to find if any parts have been modified or superseded.

B. Visual Inspection

(1) Examine all parts for corrosion. Make sure that you measure the quantity (surface,
depth) and location of corrosion that you find. Refer to Page Block 601 - REPAIR for
corrosion removal procedures.

(2) Examine all parts for damage, cracks, scratches, abrasion and distortion.

(3) Examine all sealing surfaces and the seal seatings for scratches, nicks, and
indentations. Make sure that you examine the bush (3-30) where the valve flap turns.

(4) Examine the seal ring assembly (3-80) for damage and abrasion.

(5) Examine all threads for indentations, breaks, and scoring.

(6) Examine all coil inserts for tightness and correct insertion depth.

(7) Examine the bearings (3-130 and 3-220) and the eye-end (2-180) for freedom of
rotation.

(8) Examine the flared ends and the nuts of the tube assemblies (1-10 and 1-90) for cracks
and damage to the threads of the nuts.

(9) Examine the valve seat (4-170) and the poppet valve (4-160) and make sure that the
seat is sharp-edged and the poppet valve face is not marked.

(10) Examine the flanged guide (4-360) and the plunger (4-350) and make sure that the
plunger moves freely in the flanged guide.

(11) Examine the MDC of the bush (3-30) for damage and abrasion.

C. Dimensional Check

(1) Examine the parts given in Page Block 801 - FITS AND CLEARANCES, Para 2. for the
correct dimensions.

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(2) Measure the inside diameter of the housing (3-300) and make sure that the
concentricity is 0.04 mm (0.0016 in.), refer to Figure 501.

0.04 mm
(0.0016 in.)
(2.984 +0.001 in.)
75.8 +0.03 mm

HOUSING (3-300)

Check of the Housing (3-300)

Figure 501

D. Spring Characteristics Check

Examine the removed springs given in Page Block 801 - FITS AND CLEARANCES, Para 4.
for the correct characteristics.

E. Microswitch Assembly Test

(1) Lever Operation Check

(a) Lightly push the lever (8-20) and make sure that it turns freely.

(b) If the lever (8-20) does not turn freely, clean the microswitch assembly (1-140) or
repair it, refer to Page Block 601 - REPAIR, Para 4.C.

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(2) Insulation Resistance Test

(a) Supply 45 Vdc with an insulation tester between pin A and pin B of the connector.
Make sure that the resistance is >100 MΩ.

(b) Operate the microswitch assembly (1-140) with your hand and use an insulation
tester to supply 45 Vdc between pin A and C of the connector. Make sure that the
resistance is >100 MΩ.

(c) Use an insulation tester to supply 45 Vdc between each of the pins A and B and the
ground area of the housing. Make sure that the resistance is >100 MΩ.

(d) Replace the microswitch assembly (1-140) if the insulation resistance is not in the
limits given.

F. Light Alloy Crack Test

If necessary, use the fluorescent penetrant method (MIL-I-6866 or approved alternative) to

do a crack test on the housing (3-300). Replace the housing if there are cracks.

G. Steel Crack Test

If necessary, use the magnetic particle method (ASTM-E1444 or approved alternative) to do

a crack test on the spring (2-240) and the valve shaft (3-250). Replace the parts if there are
cracks.

3. Parts Inspection

After the visual inspection and the checks, put the parts into a group from this list:
- Serviceable
- Repair
- Discard and replace.

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REPAIR

1. General

A. This section gives the procedures for the repair or replacement of the unserviceable
components found in the CHECK or TESTING AND FAULT ISOLATION procedures.

B. Replace components which you cannot repair with these procedures.

C. Refer to the List of Materials at the front of this Manual for repair materials.

WARNING: OBEY ALL HEALTH AND SAFETY PRECAUTIONS APPLICABLE TO THE TOOL
MATERIAL SUPPLIERS INSTRUCTIONS.

2. Removal of Corrosion

A. Remove light corrosion with an abrasive stone or a glassfiber brush.

B. Measure the areas that have had corrosion removal and make sure the dimensions are not
less than the specified tolerances (refer to Page Block 801 - FITS AND CLEARANCES).

C. Use the correct chemicals to remove heavy corrosion. The recommended materials are:
- JENOLITE RRN1 (Steel parts)
- DEOXIDINE 624 (Aluminum alloy parts).
NOTE: You can use approved alternatives.

D. After removal of the corrosion, examine the part and make sure that the mechanical strength
of the part has not been decreased.

3. Surface Treatment

A. Use the LIEBHERR STANDARD PRACTICES MANUAL 20-00-10, Para. 6, Type A, to repair
the passivated surfaces of these parts:
- Lever (2-70)
- Shaft (2-200)
- Valve plate (3-90)
- Valve shaft (3-250)
- Stop (6-30)
- Valve seat (6-60).

B. Use the LIEBHERR STANDARD PRACTICES MANUAL 20-00-10, Section 1, to repair minor
damage of the anodic oxidized surface of the parts.

4. Special Repairs

A. Replacement of the Coil Inserts

(1) Use a removal tool to remove the loose or damaged insert.

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(2) Clean the threaded hole.

(3) Refer to Figure 601. Apply a thin layer of Vaseline Brisal 0X50-855 to the threaded
holes of the coil insert at the bonding positions.

(4) Use an insertion tool to install the coil insert to a depth of 1/4 of a turn below the surface
of the hole.

(5) Carefully break and remove the fitting tang.

COIL INSERT (2-310) BONDING POSITION

COIL INSERT (2-320)

COIL INSERT (3-290) BONDING POSITION

HOUSING (2-330)
COIL INSERT (2-320)

HOUSING (4-140)

COIL INSERT (4-130)

HOUSING (3-300)

BONDING POSITION
COIL INSERT (3-290)

BONDING POSITION

BONDING POSITION

COIL INSERT (5-150) BRACKET (5-160) HOUSING (4-450)

COIL INSERT
(4-430)
COIL INSERT (4-430)

BONDING POSITION

COIL INSERT
COIL INSERT (4-430) (4-440)

BONDING POSITION
BONDING POSITION

COIL INSERT (5-140)

Bonding Positions
Figure 601

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B. Repair of the Molybdenum-Disulphide Coating of the Bush (3-30)

WARNING: 1. USE PROTECTIVE CLOTHING, RUBBER GLOVES AND A FACE MASK WHEN
YOU USE CHEMICAL SOLUTIONS. THE CHEMICAL SOLUTIONS ARE
DANGEROUS AND CAN CAUSE INJURY TO PERSONNEL.

2. THE CHEMICAL SOLUTIONS ARE DANGEROUS. DO NOT BREATHE THE GAS.

DO NOT USE IT IN CLOSED AREAS.

(1) Remove the damaged Molybdenum-Disulphide Coating (MDC) of the bush (3-30) in a
15% chromic acid solution at a temperature of between 70 and 80°C (158 and 176°F).

(2) Wash the bush (3-30) and then dry it.

(3) Examine the bush (3-30) and make sure the bush has no external damage and look at
the inside diameter for signs of wear.

(4) Refer to Figure 602. Measure the bush inside diameter and make sure the inside
diameter is 73.7 +0.1 mm (2.9016 +0.004 in.).
(5) Make sure there is no external damage and the dimension of the bush (3-30) is as
shown on Figure 602.

(6) Refer to Figure 602. Apply a mixture of one part Molykote 106 to one part Thinner 106,
as given in MIL-L-8937, to the bush (3-30). The thickness of the layer must be between
6 and 15 µm (236 and 590 µin.
NOTE: Apply the MDC constantly.

WERE INDICATED ∅ 73.7 +0.1 mm

APPLY THE MOLYKOTE 106 ∅ (2.9016 +0.004 in.)
(MOLYBDENUM DISULPHIDE) (WITHOUT MOLYKOTE 106)

BUSH (3-30) 0.8 µm (32 µin.)

19 mm (0.75 in.) MIN.

LENGTH OF FIT

Repair of Bush (3-30)

Figure 602

(7) Dry the MDC for 30 minutes at a room temperature of between 18 and 22°C
(64 and 71°F).

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(8) Put the bush (3-30) in an oven at a temperature of 155 ±5°C (311 ±9°F) and let the
MDC become hard for three hours.

C. Repair of the Microswitch Assembly

(Refer to Figure 603)

(1) Disassembly of the Microswitch Assembly

(a) Push the pin (8-10) out of the housing (8-40).

(b) Remove the lever (8-20) and the spring (8-30) from the housing (8-40).
NOTE: Remove the lever (8-20) and the spring (8-30) only if these items are
damaged or for cleaning. The installation is not easy.

LEVER (8-20)
SPRING (8-30)
PIN (8-10)
CONTACT
PIN (8-10)
CENTER CENTER
PART NUMBER AREA MICROSWITCH PUNCH PUNCH

HOUSING (8-40)

Installation of the Lever

Figure 603

(2) Cleaning

Refer to Page Block 401 - CLEANING for the cleaning procedure.

(3) Check

Refer to Page Block 501 - CHECK for the check procedure.

(4) Assembly

(a) Put the spring (8-30) into the recess of the lever (8-20).

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WARNING: BEFORE YOU INSTALL THE LEVER (8-20) AND THE SPRING (8-30), PUT ON
THE APPLICABLE EYE PROTECTION. THE SPRING IS COMPRESSED WHEN
YOU INSTALL THE LEVER.

CAUTION: INSTALL THE LEVER (8-20) CAREFULLY, YOU CAN DAMAGE THE CONTACT
OF THE INSTALLED MICROSWITCH.

(b) Push the spring down and install the lever (8-20) together with the spring (8-30) in
the housing recess. Make sure that the lever is on the contact of the microswitch.

(c) Move the lever (8-20) and the spring (8-30) together to the correct position in the
housing. Make sure that the spring is in the recess of the housing (8-40) and the
hole of the lever and the holes of the housing align.

(d) Refer to Figure 603. Install the pin (8-10) in the housing (8-40) so that one side of
the pin aligns with the housing surface.

(e) Make sure that the lever (8-20) moves freely and the microswitch operates correctly.

(f) Refer to Figure 603. Safety the pin (8-10) with two center punches on each housing
side.

(g) If there is no P/N on the microswitch assembly or you cannot read the P/N, write
down the applicable P/N (refer to IPL Figure 8) with white ink (refer to Figure 603).

(h) When the ink is dry, make a mixture of Aerodur Clearcoat UVR 890-6235 and
Hardener S66/22-R (mixture ratio 1 : 1). Apply a layer of the mixture to the P/N
area.

D. Repair of the Identification Mark Areas on the Solenoid Dummy Assembly

(1) If there is no red identification mark on the solenoid dummy assembly (1-190) or it is
damaged, remove the remaining paint finish from this area, refer to Figure 604.

RED IDENTIFICATION MARK AREA

SOLENOID DUMMY PART NUMBER AREA

ASSEMBLY(1-190)

Identification Mark Areas on the Bracket

Figure 604

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(2) Clean the identification mark area fully.

(3) Make a mixture of Hardener WR-Primer and WR-Hardener (mixture ratio 1 : 1). Apply a
layer of the mixture to the identification mark area as shown on Figure 604 and let it dry.

(4) Make a mixture of Aerodur Finish C21-100UVR red and Hardener S66/22-R (mixture
ratio 1 : 1). Apply a layer of the mixture to the area as shown on Figure 604 and let it
dry.

(5) If there is no P/N on the solenoid dummy assembly or you cannot read the P/N, write
down the applicable P/N (refer to IPL Figure 5) with white ink (refer to Figure 604).

(6) When the ink is dry, make a mixture of Aerodur Clearcoat UVR 890-6235 and Hardener
S66/22-R (mixture ratio 1 : 1). Apply a layer of the mixture to the P/N area.

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ASSEMBLY, INCLUDING STORAGE

1. General

A. Examine the parts for correct part number and correct build standard. Make sure they are
serviceable.

B. Make sure that all parts are clean and all preservative material used during storage is
removed.

C. Make sure that the shelf life of the seals has not expired before you use them.

D. Use only new cotter pins, gaskets, spring shims and self locking nuts.

2. Special Materials

Refer to the List of Materials at the front of this Manual.

NOTE: You can use approved alternatives.

3. Special Tools

A. Refer to Page Block 901 - SPECIAL TOOLS, FIXTURES AND EQUIPMENT.

B. Refer to Table 701 for the additional items necessary:

Nomenclature Part No. Code Supplier

Crimping Pliers 69710-1 D8512 AMP DEUTSCHLAND GmbH

Amperestrasse 7 - 11
Insert 576711-0 63225 Langen
Germany

Special Tools
Table 701

4. Assembly Procedure

A. Assembly of the Solenoid Valve Assembly

NOTE: Make sure that the resistance between pin C and the body is ≤20 mΩ, refer to Page
Block 101 - TESTING AND FAULT ISOLATION, Para. 9.C.

(1) Use a ball, ∅ 6.35 mm (0.25 in.) and make a light indentation on a new valve seat
(6-60).

(2) Install the poppet valve (6-50), the spring (6-40) and the stop (6-30) into the valve seat
(6-60).

(3) Torque the stop (6-30) to 5 Nm (44.3 lbf in.). Make sure there is no deformation at the
stop edges after you apply the torque. If necessary, remove the burrs from the stop.

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(4) Refer to Figure 701. Use a Dial Test Indicator to measure the poppet valve free-play.
Make sure that the poppet valve free-play is 0.49 +0.01 mm (0.0193 +0.0004 in.).

VALVE SEAT (6-60) POPPET VALVE (6-50)

POPPET VALVE FREE-PLAY

0.49+0.01 mm (0.0193+0.0004 in.)

/ / 0.005 mm (0.0002 in.) SPRING (6-40)

APPLY LOCTITE 620 TO THIS AREA

1.6 µm
(63 µin.)

GRIND THIS SURFACE STOP (6-30)

Measurement of the Poppet Valve Free-Play

Figure 701

(5) Remove the stop (6-30) from the valve seat (6-60).

(6) If the poppet valve free-play is less than the limit, replace the valve seat (6-60) as
follows:

(a) Remove the spring (6-40) and the poppet valve (6-50) from the valve seat (6-60).
(b) Do steps (1) thru (5) again with a new valve seat (6-60).

(7) If the poppet valve free-play is more than the limit, grind the valve seat (6-60) as follows:

(a) Remove the spring (6-40) and the poppet valve (6-50) from the valve seat (6-60).

(b) Refer to Figure 701. Grind the valve seat (6-60) to get the correct poppet valve
free-play.

(c) Clean the valve seat (6-60) with Ethyl Alcohol.

(d) Use a lint-free cloth or clean, dry compressed air to dry the valve seat (6-60).

(e) Do steps (2) thru (5) again.

(8) If the poppet valve free-play is in the limit, apply a thin layer of Loctite 620 to the thread
area of the stop (6-30) as shown in Figure 701.

(9) Install the stop (6-30) into the valve seat (6-60) and torque the stop to 5 Nm
(44.3 lbf in.). Make sure there is no deformation at the stop edges after you apply the
torque. If necessary, remove the burrs from the stop.

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(10) Refer to Figure 702. Measure the dimension “X” on the solenoid (6-80) and record the
value.

(11) Refer to Figure 702. Push the poppet valve (6-50) against the stop (6-30) and measure
the dimension “Y” on the valve assembly (6-10). Record the value.

SOLENOID (6-80)

PART NUMBER AREA

VALVE ASSEMBLY (6-10) 1.6 µm

GRIND THIS SURFACE
(63 µin.)
FORCE
VALVE SEAT (6-60)

Z
POPPET VALVE (6-50)

CORE (6-90)

STOP (6-30)

Calculation of the Core Length

Figure 702

(12) Calculate the correct length “Z” of the core (6-90) as follows:

Z=X+Y-W

W = The necessary core movement 0.55 ±0.01 mm (0.0216 ±0.0004 in.)

X = Refer to Figure 702. The dimension measured at the solenoid (6-80)
Y = Refer to Figure 702. The dimension measured at the valve assembly (6-10)
Z = The necessary core length

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(13) Refer to Figure 702. Grind the core (6-90) to the length “Z” ±0.01 mm (±0.0004 in.),
calculated in step (12). Remove the burrs of the grinded surface.

(14) Install the spring (6-70) and the core (6-90) into the solenoid (7-80).

(15) Apply Loctite 222 to the threaded bores of the solenoid (6-80) for the screws (6-20).

(16) Attach the valve assembly (6-10) to the solenoid (6-80) with the screws (6-20). Torque
the screws to 0.55 Nm (4.87 lbf in.).

(17) If there is no P/N on the solenoid or you cannot read the P/N, write down the applicable
P/N as follows:

(a) Refer to Figure 702. Use the white ink to write down the applicable P/N (refer to IPL
Figure 6).

(b) When the ink is dry, make a mixture of Aerodur Clearcoat UVR 890-6235 and
Hardener S66/22-R (mixture ratio 1 : 1).

(c) Apply a layer of the mixture to the P/N area.

(18) Do the test as given in Page Block 101 - TESTING AND FAULT ISOLATION, Para. 9.

B. Assembly of the Solenoid Dummy Assembly

(Refer to Figure 703)

(1) Cut three white wires (5-120) to the lengths that follow:
- One wire to 60+5 mm (2.36+0.2 in.)
- Two wires to 70+5 mm (2.76+0.2 in.).
(2) Remove approximately 6 mm (0.24 in.) of the insulation from the wire ends.

(3) Cut three thermofit sleeves (5-100) to a length of 10+1 mm (0.4+0.04 in.).

(4) Cut two thermofit sleeves (5-110) to a length of 20+1 mm (0.8+0.04 in.).
(5) Use the Crimping Pliers (69710-1) together with the Insert (576711-0) to crimp the
terminal lug (5-60) to the wire (1-120) with a length of 60+5 mm (2.36+0.2 in.).
(6) Refer to Figure 703. Use the Soft Solder Wire (L-SN63PB37RS15N122) to solder the
wires (5-120) with a length of 70+5 mm (2.76+0.2 in.) to the power resistor (5-70).
(7) Move the two thermofit sleeves (5-110) over the cooled joints and then use heat to give
them the correct shape.

(8) Apply a thin layer of compound (Skoly C5A) to the threads of the screws (5-20).

(9) Apply a thin layer of vaseline (BRISAL OX50-855) to the threaded hole of the bracket
(5-160) for the screw (5-30) at the bonding position.

(10) Attach the receptacle connector (5-10) to the bracket (5-160) with the screws (5-20 and
5-30) and torque the screws to 0.5 ±0.1 Nm (4.4 ±0.9 lbf in.).

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BONDING POSITION

5-10 5-30
5-20 5-50
5-40

5-60
5-100
5-110 5-100 60 mm (2.76 in.)
LENGTH
5-70
5-120
5-90 5-160
5-80

5-110
70 mm (2.76 in.)
LENGTH PART NUMBER AREA

TERMINAL LUG (5-60)

POWER RESISTOR (5-70)

C A B

RECEPTACLE CONNECTOR (5-10)

Assembly of the Solenoid Dummy Assembly

Figure 703
(11) Apply a thin layer of vaseline (BRISAL OX50-855) to the terminal lug (5-60), the nut
(5-40) and the washer (5-50).

(12) Refer to Figure 703. Attach the wire (5-120) and the terminal lug (5-60) to the installed
screw (5-30) with the washer (5-50) and the nut (5-40).

(13) Apply a layer of Heat Conductive Paste (WLP500) to the contact area of the power
resistor (5-70).

(14) Attach the power resistor (5-70) to the bracket (5-160) with the screws (5-80) and the
washers (5-90). Torque the screws to 0.5 ±0.1 Nm (4.4 ±0.9 lbf in.).

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(15) Move the three thermofit sleeves (5-100) over the wires (5-120) at the power resistor
(5-70) and over the wire with the terminal lug (5-60).

(16) Use the Soft Solder Wire (L-SN63PB37RS15N122) to solder the wires (5-120) to the
receptacle connector (5-10) as shown on Figure 703.

(17) Move the three thermofit sleeves (5-100) over the cooled joints at the receptacle
connector (5-10) and then use heat to give them the correct shape.

(18) If there is no P/N on the solenoid dummy assembly or you cannot read the P/N, write
down the applicable P/N as follow:

(a) Refer to Figure 703. Use white ink to write down the applicable P/N (refer to IPL
Figure 5).

(b) When the ink is dry, make a mixture of Aerodur Clearcoat UVR 890-6235 and
Hardener S66/22-R (mixture ratio 1 : 1).

(c) Apply a layer of the mixture to the P/N area.

(19) Do the test given in Page Block 101 - TESTING AND FAULT ISOLATION, Para. 8.

C. Pressure-Control Valve Assembly

(Refer to Figure 704, Figure 705 and Figure 706)

(1) Apply a thin layer of Loctite 222 to the thread of the fixed bleed plug (4-400).

(2) Install the fixed bleed plug (4-400) in the housing (4-450).

(3) Apply a thin layer of Loctite 222 to the thread of the fixed bleed plug (4-230).

(4) Install the fixed bleed plug (4-230) in the housing (4-140).

(5) Install the spring (4-220) and the spring retainer (4-210) in the housing (4-140).

(6) Use the Installation Tool (56507S0100) to install the preformed packing (4-200) on the
valve seat (4-170).

(7) Make sure the poppet valve (4-160) moves freely in the valve seat (4-170).

(8) Apply a thin layer of compound (Skoly C5A) to the threads of the screws (4-180).

(9) Install the valve seat (4-170) in the housing (4-140) bore with the washers (4-190) and
the screws (4-180). Torque the screws to 0.8 Nm (7.1 lbf in.).
(10) Install the poppet valve (4-160) with the cylindrical end first, into the hole of the installed
valve seat (4-170).

(11) Apply a very thin layer of adhesive/sealant (Silastic 738 RTV) to the housings (4-140
and 4-450) where they touch the diaphragm (4-150).

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4-410

4-400

4-20
4-30

4-450
4-410
4-390
4-380 4-10
4-360
4-370
4-40
4-350
4-90

4-100

4-60
4-340
4-50

4-330
4-140
4-320
4-80
4-240
4-100
4-230

4-270
4-220
4-250 4-310
4-210
4-200 4-190 4-280 4-300

4-170 4-180
4-290
4-260
4-160

4-150

Assembly of the Pressure Control Valve

Figure 704

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(12) Refer to Figure 705. Apply vaseline (Brisal OX50-855) to the thread of the screw (4-80)
at the bonding position. Apply compound (Skoly C5A) to the threads of the other screws
(4-80 and 4-90).

HOUSING (4-450) HOUSING (4-450)

BONDING BONDING
POSITION POSITION

BONDING POSITION BONDING POSITION

Bonding Positions of the Housing (4-450)

Figure 705

(13) Attach the diaphragm (4-150) and the housing (4-140) to the housing (4-450) with the
washers (4-100) and the screws (4-80 and 4-90). Torque the screws to 1 Nm
(8.8 lbf in.). Make sure that the holes of the diaphragm (4-150) and the housings (4-140
and 4-450) align.

(14) Apply compound (Skoly C5A) to the threads of the screws (4-60). Install the plate (4-50)
with the screws on the housing (4-140). Torque the screws to 0.8 Nm (7.1 lbf in.).

(15) Use the Installation Tool (56507S0100) to install the preformed packing (4-390) on the
flanged guide (4-360).

(16) Make sure the plunger (4-350) moves freely in the flanged guide (4-360).

(17) Apply compound (Skoly C5A) to the threads of the screws (4-370).

(18) Attach the flanged guide (4-360) to the housing (4-450) with the washers (4-380) and
the screws (4-370). Torque the screws to 0.8 Nm (7.1 lbf in.).

(19) Install the plunger (4-350), with the small diameter first, into the flanged guide (4-360).

(20) Apply a very thin layer of adhesive/sealant (Silastic 738 RTV) to the housing (4-450)
and the cover (4-240) where they touch the diaphragm (4-340).

(21) Install the spring retainer (4-320) and the spring (4-330) in the cover (4-240).

(22) Install the diaphragm (4-340) on the cover (4-240), then install the assembled cover to
the housing (4-450). Make sure that the holes of the diaphragm (4-340), the housing
(4-450) and the cover (4-240) align.

(23) Apply vaseline (Brisal OX50-855) to the ground plate (4-280) and the threads of the
screw (4-260), that holds the ground plate.

(24) Attach the cover (4-240) to the housing (4-450) with the screws (4-250) and the
washers (4-270).

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(25) Attach the ground plate (4-280) to the housing (4-450) with the screw (4-260).

(26) Torque the screws (4-250 and 4-260) to 1 Nm (8.8 lbf in.).

(27) Apply compound (Skoly C5A) to the threads of the bolt (4-290).

(28) Install the nut (4-300) on the bolt (4-290).

(29) Install the washer (4-310) and the bolt (4-290) together with the nut (4-300) to the cover
(4-240).
NOTE: The nut (4-300) is tightened after the adjustment of the pressure control valve.
(Refer to Page Block - TESTING AND FAULT ISOLATION).

(30) Use the Seal Guide (56507S0002) to install the preformed packing (4-40) on the union
(4-10).

(31) Install the union (4-30) on the union (4-10) and make sure that you can see the installed
preformed packing (4-40). This helps you to install the unions easily.

(32) Use the Seal Guide (56507S0002) to install the preformed packing (4-20) on the union
(4-10).

(33) Apply a very thin layer of compound (Scoly C5A) to the thread of the union (4-10).

(34) Refer to Figure 706. Install the union (4-10) with the assembled union (4-30) in the
housing (4-450). Tighten the union with your hand.
NOTE: The union (4-10) is tightened in Para. 4.P.(7).

(35) Install the bushes (4-410) in the housing (4-450).

HOUSING (4-140)

HOUSING (4-450)
PART NUMBER AREA
UNION (4-30)
UNION (4-10)

COVER (4-240)

°
28 ±2

Assembly Position of the Union (4-40)

Figure 706

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(36) If there is no P/N on the pressure control valve or you cannot read the P/N, write down
the applicable P/N as follow:

(a) Refer to Figure 706. Use white ink to write down the applicable P/N (refer to IPL
Figure 4).

(b) When the ink is dry, make a mixture of Aerodur Clearcoat UVR 890-6235 and
Hardener S66/22-R (mixture ratio 1 : 1).

(c) Apply a layer of the mixture to the P/N area.

D. Installation of the Sound Absorber

(Refer to Figure 710)

(1) If removed, make sure that the hole, the area for the new fitting (3-260) and the sound
absorber (3-270) are clean.

(2) Apply a layer of adhesive/sealant (Silastic 732 RTV) to the middle threads of the sound
absorber (3-270).

CAUTION: REMOVE THE UNWANTED ADHESIVE/SEALANT SILASTIC 732 RTV CAREFULLY.

THIS WILL HELP PREVENT CONTAMINATION OF THE SOUND ABSORBER.

(3) Refer to Figure 710. Install the new fitting (3-260) in the housing (3-300) with the sound
absorber (3-270). Make sure that the slot of the fitting points downstream. Remove the
unwanted adhesive/sealant.

(4) Let the adhesive/sealant (Silastic 732 RTV) cure.

NOTE: The cure time for adhesive/sealant (Silastic 738 RTV) is:
- At room temperature 24 hours
- At 80°C (176°F) two hours.

E. Assembly of the Pneumatic Actuator

(Refer to Figure 708)

(1) Use protection plates to hold the housing assembly (2-300) in a vice.

(2) Refer to Figure 707. Apply vaseline (Brisal OX50-855) to the threads of one screw
(2-260) at the bonding position and apply compound (Scoly C5A) to the threads of all
the other screws.

(3) Attach the gasket (2-290) and the housing (2-250) to the housing assembly (2-300) with
the washers (2-280), the screws (2-260) and the nuts (2-270). Torque the nuts to
2.5 ±0.3 Nm (22.1 ±2.7 lbf in.).

(4) Apply compound (Scoly C5A) to the threads of the shaft (2-200).

(5) Attach the disc (2-230), the diaphragm (2-220) and the retainer (2-210) to the shaft
(2-200) with one nut (2-190). Torque the nut to 5.5 ±0.3 Nm (48.7 ±2.7 lbf in.).

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HOUSING ASSEMBLY (2-300)

BONDING
POSITION

BONDING BONDING
POSITION POSITION

Bonding Positions of the Housing Assembly (2-300)

Figure 707
(6) Apply compound (Scoly C5A) again to the threads of the shaft (2-200).

(7) Install the second nut (2-190) and the eye-end (2-180) on the assembled shaft (2-200)
as shown in Figure 709.

(8) Refer to Figure 709. Make sure the length of the assembled items is 91.2 ±0.25 mm
(3.59 ±0.01 in.) and the flat sides of the eye-end (2-180) aligns with two opposite holes
of the diaphragm (2-220). Torque the nut (2-190) to 5.5 ±0.3 Nm (48.7 ±2.7 lbf in.).

(9) Apply Graphite Powder with a soft brush to the roll areas of the diaphragm (2-220).

(10) Apply a very thin layer of adhesive/sealant (Silastic 738 RTV) to the flanges of the
housing (2-250) and the cover (2-140).

(11) Install the spring (2-240) into the housing (2-250).

(12) Install the assembled shaft (2-200) into the housing (2-250) so that the holes align and
the eye-end has the correct position to install it to the lever (2-70).
(13) Put the cover (2-140) on the installed diaphragm (2-220). Make sure that the bonding
positions of the cover (2-140) and of the housing (2-250) flange align.

(14) Install the Mounting Device (56526S0000) on the housing (2-250) and to the shaft
(2-200).

(15) Turn the mounting device handle clockwise. This will push the assembled shaft (2-200)
into the housing (2-250) against the force of the spring (2-240).

(16) Apply vaseline (Brisal OX50-855) to the thread of the screw (2-170) for the bonding
position and apply compound (Scoly C5A) to the threads of all the other screws.

(17) Attach the cover (2-140) to the housing (2-250) with the washers (2-160), the screws
(2-170) and the nuts (2-150). Torque the screws to 0.5 ±0.05 Nm (4.4 ±0.44 lbf in.).

(18) Remove the Mounting Device (56526S0000) from the housing (2-250).

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2-220
2-230

2-140

2-200 2-20

2-30

2-10
............
..... 2-40
...... ..... ...........
. ............
2-50
2-160
2-170
2-100
2-180 2-60
2-190
2-70
2-280 2 -270 2-110 2-90

2-100 2-120 2-80

2-190
2-290
2-300
2-250
....
2-210 . ....
.
2-280 ... . .....
2-260 .........
. ......
....... 2-130
. .... ... ......
2-240 2-160
BONDING
2-150 POSITION

2-340

Assembly of the Pneumatic Actuator Assembly

Figure 708

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DISC (2-230)
NUT (2-190)
PARALLEL

SHAFT (2-200)

EYE-END (2-180)

NUT (2-190)

RETAINER (2-210)

DIAPHRAGM (2-220)
91.2 ±0.25 mm (3.59 ±0.01 in.)

Adjustment of the Eye-end

Figure 709

F. Valve Housing Assembly

(Refer to Figure 710)

(1) Put the Guide Ring (58202-0003) with the Threaded Stud (58202-0004) on the housing
(3-300), where the cover (3-160) will be installed.

(2) Apply a thin layer of Silicone Grease (Rodorsil 55) to the housing hole, where the valve
shaft (3-250) will be installed.

(3) Apply a thin layer of Silicone Grease (Rodorsil 55) to the seal ring (3-240).

(4) Refer to Figure 710. Install the seal ring (3-240), the washer (3-230) and the ball
bearing (3-220) to the bored end of the valve shaft (3-250). Make sure:
- The seal ring has the correct position on the valve shaft
- The concave side of the washer is against the seal ring.

(5) Install the Guide Sleeve (58202-0002) on the splined end of the valve shaft (3-250).

(6) Refer to Figure 710. Install the seal ring (3-150) in the housing hole. Make sure that the
seal ring has the correct position in the housing (3-300).

(7) Attach the Insertion Sleeve (58202-0001) to the housing bore, where the housing
(3-330) will be installed.

(8) Install the assembled valve shaft (3-250) into the housing (3-300). Make sure the seal
ring (3-150) touches to the Insertion Sleeve (58202-0001).

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BONDING POSITION

2-20

2-30 2-290
2-270
2-280
2-10

2-40
2-50
2-330 2-60
3-120
2-180
3-130
2-100
3-140
2-70
3-150

3-300 3-40

3-50
3-60

3-90 3-70

FLOW

3-250

3-260

3-80

3-240
3-230 3-270
3-220
3-200 3-190
3-210 3-180
3-200 3-160 3-110
3-100

Assembly of the Valve Housing

Figure 710

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(9) Apply a thin layer of Silicone Grease (Rodorsil 55) to the seal ring (3-150).

(10) Remove the Guide Sleeve (58202-0002) from the installed valve shaft (3-250).

(11) Put the housing (3-300), together with the Insertion Sleeve (58202-0001), on a flat
surface and make sure that the installed absorber (3-270) is at the top.

(12) Remove the Guide Ring (58202-0003) from the housing (3-300).

(13) Refer to Figure 710. Install the spring shims (3-200) and the shim (3-210) in the correct
position in the housing (3-300).

(14) Put the cover (3-160) on the housing (3-300) in the position as shown on Figure 711.
BONDING POSITION

BONDING JUMPER (3-170)

SCREW (3-180)

WASHER (3-190) OPEN FLOW

CLOSED

COVER (3-160)
HOUSING (3-300)

Assembly of the Cover (3-160)

Figure 711

(15) Apply vaseline (Brisal OX50-855) to one lug of the bonding jumper (3-170).

(16) Refer to Figure 711. Apply vaseline (Brisal OX50-855) to the threads of the screw
(3-180) for the bonding position. Apply compound (Skoly C5A) to the threads of all the
other screws.
(17) Attach the cover (3-160) to the housing (3-300) with the bonding jumper (3-170), the
washers (3-190) and the screws (3-180). Torque the screws to 2.5 ±0.3 Nm
(22.1 ±2.7 lbf in.).

(18) Turn the housing (3-300) and remove the Insertion Sleeve (58202-0001) from the
housing.

(19) Refer to Figure 710. Install the washer (3-140), the ball bearing (3-130) and the
distance sleeve (3-120) in the housing (3-300). Make sure that the concave side of the
washer is against the seal ring (3-150).

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G. Pneumatic Actuator Installation

(Refer to Figure 708)

(1) Apply vaseline (Brisal OX50-855) to the threads of one screw (2-110) for the bonding
position and apply compound (Scoly C5A) to the threads of all the other screws.

(2) Attach the gasket (2-130) and the housing (2-330), with the attached pneumatic
actuator, to the housing (3-300) with the washers (2-120) and the screws (2-110).
Torque the screws to 2.5 ±0.3 Nm (22.1 ±2.7 lbf in.).

H. Installation of the Valve Flap

(Refer to Figure 710)

CAUTION: DO NOT APPLY TOO MUCH FORCE TO THE SEAL RING ASSEMBLY (3-80)
DURING INSTALLATION. THIS WILL HELP PREVENT DAMAGE OR A CHANGE IN
SHAPE OF THE SEAL RING ASSEMBLY.

(1) Install the inner ring of the seal ring assembly (3-80) into the groove of the valve plate
(3-90). Make sure the pin of the valve plate is in the gap of the inner ring.

(2) Install the two outer rings of the seal ring assembly (3-80) into the groove of the valve
plate (3-90). Make sure the pin of the inner ring is in the groove of the two outer rings.

(3) Put the nuts (3-50), the washers (3-60) and the assembled valve plate (3-90) on the
Holding Fixture (58222A0000-01). Make sure that:
- The slot of the seal ring is in the position as shown in Figure 712
- The holes of the valve plate (3-90) and the thread of the nuts (3-50) align.

(4) Turn the valve shaft (3-250) to the closed position (shown from the inlet side).

(5) Attach the assembled valve housing assembly to the Holding Fixture (58222A0000-01).
Make sure that the holes of the valve shaft (3-250) and the thread of the nuts (3-50)
align.

(6) Attach the valve plate (3-90) to the valve shaft (3-250) with the screws (3-70). Torque
the screws to 2.5 ±0.3 Nm (22.1 ±2.7 lbf in.).

(7) Remove the assembled valve housing assembly from the Holding Fixture
(58222A0000-01).

(8) Turn the valve shaft (3-250) to the open position (shown from the inlet side).

(9) Apply a thin layer of Silicone Grease (Rodorsil 55) to the preformed packing (3-40).

(10) Install the preformed packing (3-40) in the valve housing assembly (3-280).

(11) Apply Silicone Grease (Rodorsil 55) to the outside diameter of the bush (3-30).

(12) Install the bush (3-30) in the housing (3-300). Make sure that the bolt hole in the bush
aligns with the bolt hole in the housing.

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HOUSING (3-300)

SEAL RING ASSEMBLY (3-80)

SLOT POSITION
OF THE SEAL RING

VALVE PLATE (3-90)

Installation of the Seal Ring Assembly

Figure 712
(13) Install the preformed packing (3-20) on the locking bolt (3-10).

(14) Install the locking bolt (3-10) in the housing (3-300). Torque the locking bolt to 2.5
±0.3 Nm (22.1 ±2.7 lbf in.).

I. Linkage Assembly Installation

(Refer to Figure 708)
(1) Attach the assembled housing (3-300) to the Holding Fixture (56837A0000-01).

(2) Make sure that the valve flap is in the closed position.

(3) Install the nut (1-40) and the washer (1-30) on the bolt (1-50).

(4) Apply a thin layer of compound (Scoly C5A) to the threads of the bolt (1-50).

(5) Install the bolt (1-50) in the bolt (1-80) until you can see 2 to 3 threads of the bolt (1-50)
at threaded end of the bolt (1-80).

(6) Install the bonded seals (1-60) and the connector (1-70) on the bolt (1-80).

(7) Apply a thin layer of compound (Scoly C5A) to the threads of the bolt (1-80).

(8) Install the assembled bolt (1-80) in the pneumatic actuator. Tighten the bolt with your
hand.

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(9) Turn the bolt (1-50) into the bolt (1-80) until you have access to the eye-end (2-180).

(10) Put the washer (2-90) on the bolt (2-80) and apply a thin layer of compound (Scoly C5A)
to the threads of the bolt.

(11) Install the bolt (2-80) and the washer (2-90) in the lever (2-70). Do not tighten the bolt at
this time.

(12) Put the lever (2-70) on the valve shaft (3-250) so that the holes of the lever and the
bearing of the eye-end (2-180) align.

(13) Turn the lever (2-70) and the valve shaft (3-250) clockwise, then push the lever down
the spline of the valve shaft. Turn the lever in the counter-clockwise direction and install
the two washers (2-100) between the eye-end and the lever.

(14) Make sure that the holes of the lever (2-70), the washers (2-100) and the bearing of the
eye-end (2-180) align.

(15) Put the washer (2-60) on the bolt (2-50) and apply a thin layer of compound (Scoly C5A)
to the shank and to the threads of the bolt.

(16) Attach the lever (2-70) to the eye-end (2-180) with the washer (2-60) and the bolt (2-50).
If necessary, turn the bolt (1-50) to give access for installation of the bolt (2-50). Torque
the bolt to 2.5 ±0.3 Nm (22.1 ±2.7 lbf in.). Make sure that the eye-end moves freely in
the lever.

(17) Align the top surfaces of the lever (2-70) and the valve shaft (3-250). Install an
applicable tool in the hole of the valve shaft (3-250). Use the tool to turn the valve shaft
to give access to the bolt (2-80). Torque the bolt to 3 ±0.2 Nm (26.6 ±1.8 lbf in.).

(18) Refer to Figure 719 and MS33540 or an approved alternative standard. Safety the bolt
(2-80) to the bolt (2-50) with wire LN9424-1-4546-9-0-63. Make sure the wire does not
touch the housing wall when the lever (2-70) turns.

(19) Apply a thin layer of compound Skoly C5A to the threads of the screw (2-20).

(20) Attach the gasket (2-40) and the cover (2-10) to the housing assembly (2-300) with the
washers (2-30) and the screws (2-20). Torque the screws to 1 ±0.1 Nm
(8.85 ±0.9 lbf in.).

(21) Apply a thin layer of compound (Skoly C5A) to the threads of the screw (1-110).

(22) Attach the gasket (1-130) and the pipe adaptor (1-100) to the valve housing assembly
(2-340) with the washers (1-120) and the screws (1-110). Torque the screws to
1 ±0.1 Nm (8.8 ±0.9 lbf in.).

(23) Refer to Figure 719 and MS33540 or an approved alternative standard. Safety the
screws (1-110) with wire LN9424-1-4546-9-0-63.

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(24) Refer to Figure 707. Apply vaseline (Brisal OX50-855) to the threads of one screw
(1-150) for the bonding position and apply compound (Scoly C5A) to the threads of all
the other screws.

(25) Attach the gasket (1-180) and the microswitch assembly (1-140) to the valve housing
assembly (2-340) with the washers (1-170) and the screws (1-150 and 1-160). Tighten
the screws.
NOTE: The screws (1-150 and 1-160) are torque loaded after the adjustment
procedure of the microswitch assembly (1-140), refer to TESTING AND FAULT
ISOLATION, Page Block 101.

J. Installation of the Pressure Control Valve

(Refer to Figure 713)

(1) Install the bushes (1-340) in the housing lugs.

(2) Attach the pressure control valve (1-280) to the valve housing assembly (2-340) with the
bolts (1-330), the washers (1-310 and 1-320) and the nuts (1-300).

(3) Torque the nuts (1-300) to 2 Nm (17.7 lbf in.), then loosen the nuts. Tighten the nuts
with your hand until they touch the surface of the lug.
NOTE: Do not safety the nuts at this step.

(4) Remove the screw (4-250) and the washer (4-270) at the second bonding position of
the cover (4-240), opposite the ground plate (4-280).

(5) Apply vaseline (Brisal OX50-855) to the free end of the bonding jumper (3-170).

(6) Install the bonding jumper (3-170), the washer (4-270) and the screw (4-250) at the
bonding position of the cover (4-240). Torque the screw to 1 Nm (8.8 lbf in.).

K. Installation of the Identification Plate

(Refer to Figure 713)

(1) If necessary, transfer all related data to a new identification plate (1-350).

(2) Apply compound (Scoly C5A) in the threaded holes of the housing (3-300) for the
screws (1-360). Attach the identification plate (1-350) to the housing with the screws so
that the letters on the plate are in the same direction as the letters “FLOW” on the
housing.

L. Installation of the Solenoid Valve Assembly

(Refer to Figure 713)

(1) Apply Silicone Grease (Rodorsil 55) to the preformed packing (1-250).

(2) Install the preformed packing (1-250) on the solenoid valve assembly (1-230).

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1-130 1-110
1-120
1-370 .... .... ..... ....
. . 1-100
..... ..
1-360
1-350

1-180 1-140

..... ....
........
1-60 .....

1-70 1-170
1-60

1-170 1-150 1-160

1-20

1-80
1-30 1-10
1-50 1-40
1-240
1-230 1-300 1-90
1-290
1-310

1-260
1-340
1-250

1-200A 1-270

1-220 4-30 1-320

1-190A 1-210
1-280

1-340
1-330

Assembly of the Pressure Regulating Valve

Figure 713

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(3) Refer to Figure 714. Apply vaseline (Brisal OX50-855) to the threads of the screw
(1-240) at the bonding position and apply compound (Scoly C5A) to the threads of all
the other screws.

(4) Attach the solenoid valve assembly (1-230) to the pressure control valve (1-280) with
the screws (1-240). Torque the screws to 1 ±0.1 Nm (8.8 ±0.9 lbf in.).

HOUSING (4-140) OF THE

PRESSURE CONTROL VALVE (1-280)

HOUSING (4-450) OF THE

PRESSURE CONTROL VALVE (1-280)

BONDING POSITION

Bonding Positions
Figure 714

M. Installation of the Solenoid Dummy Assembly

(Refer to Figure 713)

(1) Apply Silicone Grease (Rodorsil 55) to the preformed packing (1-210A).

(2) Install the preformed packing (1-210) on the plug (1-220).

(3) Install the plug (1-220) in the pressure control valve (1-280).

(4) Refer to Figure 714. Apply vaseline (Brisall OX50-855) to the threads of the screw
(1-200A) at the bonding position and apply compound (Skoly C5A) to the threads of all
the other screws.

(5) Attach the solenoid dummy assembly (1-190A) to the pressure control valve (1-280)
with the screws (1-200A). Torque the screws to 1 ±0.1 Nm (8.8 ±0.9 lbf in.).

N. Installation of the Solenoid Valve Assembly (1-190B)

(Refer to Figure 715)
NOTE: You can install the solenoid valve assembly (1-190B) as an alternative to the
solenoid dummy assembly (1-190A).

(1) Apply Silicone Grease (Rodorsil 55) to the preformed packings (1-210 and 1-215).

(2) Install the preformed packings (1-210 and 1-215) on the solenoid valve assembly
(1-190B).

(3) Refer to Figure 714. Apply vaseline (Brisal OX50-855) to the threads of the screw
(1-200B) at the bonding position and apply compound (Skoly C5A) to the threas of all
the other screws.

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(4) Attach the solenoid valve assembly (1-190B) to the pressure control valve (1-280) with
the screws (1-200B). Torque the screws to 1 ±0.1 Nm (8.8 ±0.9 lbf in.).

1-190B
1-200B

1-225

1-215
1-390 1-210

1-280

Installation of the Solenoid Valve Assembly (1-190B)

Figure 715

O. Installation of the Filter Assembly

(Refer to Figure 716)

(1) Apply Silicone Grease (Rodorsil 55) to the preformed packings (7-20, 7-30, 7-50, 7-70
and 7-80).
(2) Install the preformed packing (7-20) on the body (7-60).

(3) Install the preformed packing (7-30) on the filter (7-40).

(4) Install the filter (7-40) into the body (7-60).

(5) Apply compound (Skoly C5A) to the threads of the body (7-60).

(6) Use protection plates to hold the body (7-60) in a vice. Install the cover (7-10) on the
body and torque the cover to 4 Nm (35.4 lbf in.). Remove the assembled body from the
vice.

(7) Install the preformed packings (7-70 and 7-80) on the union (7-90).
(8) Install the union (7-90) in the body (7-60) and make sure that you can see the installed
preformed packing (7-80). This helps you to install the union easily.

(9) Install the preformed packing (7-50) in the body.

(10) Apply compound (Skoly C5A) to the threads of the union (7-90).

(11) Install the union (7-90) together with the installed body (7-60) in the pressure control
valve (1-280). Make sure that the body has the correct position, refer to Figure 719.
(12) Hold the pressure control valve (1-280) in position and torque the union (7-90) to
5 ±0.3 Nm (44 ±2.7 lbf in.).

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7-10

7-40

7-30

7-20

7-60

7-90
7-50

7-70
7-80
Installation of the Filter (1-270)
Figure 716
(13) Remove the PRV from the Holding Fixture (56837A0000-01).

P. Installation of the Tube Assemblies

(Refer to Figure 713)

CAUTION: DO NOT GET THE COMPOUND (SKOLY C5A) INTO THE TUBE. THIS WILL HELP
PREVENT CONTAMINATION.

(1) Refer to Figure 717. Apply a thin layer of the compound (Scoly C5A) to these positions:
- The thread of the connector (1-70)
- The pipe union of the pressure control valve (1-280)
- The flares of the tube assembly (1-10)
- The rear face of the tube assembly sleeves.

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APPLY COMPOUND (SKOLY C5A)

TUBE
CONNECTOR

SLEEVE
NUT

Lubrication Positions
Figure 717
(2) Connect the tube assembly (1-10) to the adaptor (1-70) and to the union of the pressure
control valve (1-280).

(3) Torque the nuts of the tube assembly (1-10) to 5 ±0.3 Nm (44 ±2.7 lbf in.), then torque
the bolt (1-80) to 5 ±0.3 Nm (44 ±2.7 lbf in.).

(4) Install the pressure seal cap (1-20) on the free end of the connector (1-70) and tighten
the pressure seal cap.
NOTE: The pressure seal cap (1-20) is tightened after the test of the PRV, refer to
Page Block - TESTING AND FAULT ISOLATION.

CAUTION: DO NOT GET THE COMPOUND (SKOLY C5A) INTO THE TUBE. THIS WILL HELP
PREVENT CONTAMINATION.

(5) Refer to Figure 717. Apply a thin layer of the compound (Scoly C5A) to these positions:
- The thread of the pipe adaptor (1-100)
- The thread of the union (4-30)
- The flares of the tube assembly (1-90)
- The rear face of the tube assembly sleeves.

(6) Connect the tube assembly (1-90) to the pipe adaptor (1-100) and to the union (4-30).
Torque the nuts of the tube assembly to 5 ±0.3 Nm (44 ±2.7 lbf in.).

(7) Hold the nut of the tube assembly (1-90) at the union (4-30) and torque the union (4-10)
to 9 +1 Nm (80 +9 lbf in.).

Q. Adjustment of the Valve Flap

(Refer to Figure 718)

(1) Measure the dimensions X and Y as shown in Figure 718. The dimensions must have
the same value ±0.1 mm (±0.004 in.).

(2) If the dimensions are not in the limit, loosen the nut (1-40) and turn the adjustment bolt
(1-50) as necessary to get the correct values, then tighten the nut.

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VALVE SHAFT VALVE PLATE VALVE PLATE BUSH

(3-250) (3-90) (3-90) (3-30)

Y
Y

SYMMETRICAL

SYMMETRICAL
68.7 mm (2.7 in.)
X
X

HOUSING
(3-300) VALVE SHAFT
(3-250)

Adjustment of the Valve-Flap

Figure 718

R. Final Assembly

(1) Do the test given in Page Block 101 - TESTING AND FAULT ISOLATION.

(2) Install the manual lever (3-100) in the valve shaft (3-250) and safety with the two
retaining rings (3-110).
(3) Hold the connector and torque the pressure seal cap (1-20) to 5 ±0.3 Nm
(44 ±2.7 lbf in.).

(4) Torque the nuts (1-300) to 2 Nm (17.7 lbf in.), then loosen the nuts.
(5) Tighten the nuts (1-300) with your hand until they touch the related lug surface.

(6) If the holes align, install the cotter pins (1-290). If necessary, loosen the nuts to the next
slot and then install the cotter pins.

(7) Safety the nuts (1-300) with the cotter pins (1-290).
(8) Use Safety Lacquer (red 9036-2) to put marks on the screws (1-150 and 1-160) and
microswitch assembly (1-140) to show that the screws are safetied.

(9) If the thermofit sleeve (1-260) is removed, cut a new thermofit sleeve to a length of
8 ±1 mm (0.32 ±0.04 in.).

(10) Refer to Figure 713. Put the blue thermofit sleeve (1-260) on the solenoid valve
assembly (1-230), then use heat to give it the correct shape.

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(11) If the thermofit sleeve (1-225) is removed from the solenoid valve assembly (1-190B),
cut a new thermofit sleeve to a length of 8 ±1 mm (0.32 ±0.04 in.).

(12) Refer to Figure 715. Put the red thermofit sleeve (1-225) on the solenoid valve
assembly (1-190B), then use heat to give it the correct shape.
(13) Refer to Figure 719 and MS33540 or an approved alternative standard. Safety the PRV
with wire LN9424-1-4546-9-0-63 as follows:
- The bolt (4-250) to the nut (4-300) and then to the screw (4-290)
- The locking bolt (3-10) to the adjacent locking hole in the housing (3-300)
- The pipe port of the connector (1-70) to the pressure seal cap (1-20)
- The pipe port of the connector (1-70) to the nut (1-40) and then to the bolt (1-50)
- The nut of the tube assembly (1-10) at the pressure control valve (1-280) to the cover
(7-10) of the filter assembly (1-270).
(14) Make sure that the screws (1-110) are safetied, refer to Para. 4. I. (23).

5. Storage Procedure

A. General

(1) Keep the PRV in its original packing in a clean, dry room or building at a temperature of
between 18 and 28°C (64 and 82°F) at a relative humidity of between 25 and 65%.

CAUTION: BEFORE YOU PUT THE PRV INTO STORAGE ON THE TOP OF ANOTHER
CONTAINER, MAKE SURE THAT THE APPLICABLE CONTAINER IS RESISTANT TO
THE WEIGHT. THIS WILL HELP PREVENT DAMAGE TO THE EQUIPMENT.

(2) If you put the PRV into storage on the top of another container, make sure that the
applicable container is resistant to the weight.

(3) Keep the PRV away from corrosive fluids, heat or ozone.

(4) Make sure you can see the identification and humidity indication labels when you put
the PRV into storage.

(5) Keep the packed PRV in a sequence of date.

B. Preparation and Packing

(1) Clean the PRV with Ethyl Alcohol.

(2) Install the protective cap (1-400) on the filter assembly (1-270).

(3) Install the protective cap (1-410) on the filter (4-10).

(4) Install the protective caps (1-380) on the valve inlet and outlet ports.

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SCREW (4-250)

NUT (4-300)

BOLT (4-290)

HOUSING (3-300)

LOCKING BOLT (3-10)

Safety Data
Figure 719 (Sheet 1 of 2)

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PIPE PORT OF THE BOLT (1-50)

CONNECTOR (1-70)

NUT OF THE PIPE NUT (1-40)

ASSEMBLY (1-10)
PRESSURE SEAL CAP (1-20)

NUT OF THE PIPE

COVER (7-10) ASSEMBLY (1-10)

BOLT (2-50)

LEVER (2-70)

BOLT (2-80)

SCREW (1-110)

Safety Data
Figure 719 (Sheet 2 of 2)

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(5) Install the protective caps (1-390) on the electrical connector of the microswitch
assembly (1-140), on the electrical connector of the solenoid valve assembly (1-230)
and on the electrical connector of the solenoid dummy assembly (1-190A) or on the
solenoid valve assembly (1-190B).

(6) Put protective material on all projections, sharp edges and corners.

(7) Wind shock absorbent material around the PRV and then wind waxed-paper around the
shock absorbent material.

CAUTION: DO STEPS (8) THRU (12) AS QUICKLY AS POSSIBLE. THE DESICCANT BAGS
ARE HYGROSCOPIC.

(8) Put sealed bags of desiccant along the length of the PRV. Use tape to hold the
desiccant bags in position.

(9) Put the PRV into a polyethylene bag which has a minimum thickness of 0.2 mm
(0.008 in.). Make sure there is sufficient material to seal the bag three times.

(10) Put an identification label into the bag and make sure you can read it.

(11) Put a humidity indicator into the bag and make sure you can seen it.

(12) Remove as much air as possible from the bag then use heat to seal it.

(13) Attach these labels to the outside of the bag:

- A label that indicates the packing date and that a desiccant is used
- A “DO NOT OPEN UNLESS IT IS NECESSARY” label.

(14) Put the PRV into an ATA 300 container and make sure it can not move freely in the
container.

(15) Close the container and attach these labels:

- Item identification
- desiccant label.
(16) Apply a layer of Clear Varnish to the labels, refer to ATA 300 for label data.

C. Removal from Storage

(1) Remove the PRV that has been in storage the longest.

(2) Remove the PRV from the container and polyethylene bag.

(3) Remove the packing materials and corrosion preventative.

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FITS AND CLEARANCES

1. General

This section gives fits and clearances, torque values and spring properties.

2. Fits and Clearances

(Refer to Figure 801 and Table 801)

A. Identifiers in Column (1) show location of the clearance or dimension to be measured.

B. Identifiers in Column (2) identify the parts in the IPL (Figure + item number).

C. Column (3) gives the original manufacturing dimensions and clearances.

D. In-service Wear Limits (Columns 4)

(1) The maximum limits are maximum wear limits. If a part is in these limits then it is
serviceable.

(2) Parts with more wear than the permitted limits, must be repaired (Refer to Page Block
601 - REPAIR), or replaced

3. Torque Values
All torque values given in this manual are shown in Table 802. The parts are identified by the
IPL figure and item number.

4. Spring Properties

The technical data for all springs used in this unit are in Table 803. The parts are identified by the
IPL figure and item number.

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1
5

Fits and Clearances - Location

Figure 801

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1 2 3 Original Mfg Limits 4 In-Service Wear Limits

FIG. Mating Assembly Dimension Allowable

Dimension
801 IPL Clearance Limits Clearance
mm (in.)
Ref. Figure mm (in.) mm (in.) mm (in.)
No. and
Item No. Min. Max. Min. Max. Min. Max. Max.

OD 3-250 9.984 9.990

(0.3931) (0.3933)
0.003 0.016
1
(0.0001) (0.0006)
ID 3-130 9.993 10.000
(0.3934) (0.3937)

OD 3-250 9.984 9.990

(0.3931) (0.3933)
0.003 0.016
2
(0.0001) (0.0006)
ID 3-220 9.993 10.000
(0.3934) (0.3937)

OD 3-220 25.991 26.000

(1.0232) (1.0236)
0.000 0.030
3
(0.0000) (0.0012)
26.000 26.021
ID 3-300
(1.0236) (1.0244)

OD 3-30 75.680 75.720

(2.9795) (2.9811)
0.015 0.080
4
(0.0059) (0.0031)
ID 3-300 75.800 75.830
(2.9842) (2.9854)

OD 3-130 25.991 26.000

(1.0232) (1.0236)
0.000 0.030
5
(0.0000) (0.0012)
ID 3-300 26.000 26.021
(1.0236) (1.0244)

Fits and Clearances

Table 801

IPL Fig and Item No. Item Torque

1-10 and 1-90 Nuts of the tube assembly 5 ±0.3 Nm (44 ±2.7 lbf in.)
1-20 Pressure seal cap 5 ±0.3 Nm (44 ±2.7 lbf in.)
1-80 Bolt 5 ±0.3 Nm (44 ±2.7 lbf in.)
1-110 Screw 1 ±0.1 Nm (8.8 ±0.9 lbf in.)
1-150 and 160 Screw 1 ±0.1 Nm (8.8 ±0.9 lbf in.)

Torque Values
Table 802 (Sheet 1 of 2)

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IPL Fig and Item No. Item Torque

1 ±0.1 Nm (8.8 ±0.9 lbf in.),

1-200 and 1-240 Screw
refer to Page Block 701, Para 4.R.(5)
1-300 Nut 2 Nm (17.7 lbf in.)
2-20 Screw 1 ±0.1 Nm (8.85 ±0.9 lbf in.)
2-50 Bolt 2.5 ±0.3 Nm (22.1 ±2.7 lbf in.)
2-80 Bolt 3 ±0.2 Nm (26.6 ±1.8 lbf in.)
2-110 Screw 2.5 ±0.3 Nm (22.1 ±2.7 lbf in.)
2-170 Screw 0.5 ±0.05 Nm (4.4 ±0.44 lbf in.)
2-190 Nut 5.5 ±0.3 Nm (48.7 ±2.7 lbf in.)
2-270 Nut 2.5 ±0.3 Nm (22.1 ±2.7 lbf in.)
3-10 Locking bolt 2.5 ±0.3 Nm (22.1 ±2.7 lbf in.)
3-70 Bolt 2.5 ±0.3 Nm (22.1 ±2.7 lbf in.)
3-180 Screw 2.5 ±0.3 Nm (22.1 ±2.7 lbf in.)
4-10 Union 9+1 Nm (80+9 lbf in.)
4-60 Screw 0.8 Nm (7.1 lbf in.)
4-80 and 4-90 Screw 1 Nm (8.8 lbf in.)
4-250 and 4-260 Screw 1 Nm (8.8 lbf in.)
4-180 Screw 0.8 Nm (7.1 lbf in.)
4-370 Screw 0.8 Nm (7.1 lbf in.)
5-20 and 5-30 Screw 0.5 ±0.1 Nm (4.4 ±0.9 lbf in.)
5-80 Screw 0.5 ±0.1 Nm (4.4 ±0.9 lbf in.)
6-20 Screw 0.55 Nm (4.87 lbf in.)
6-30 Stop 5 Nm (44.3 lbf in.)
7-10 Cover 4 Nm (35.4 lbf in.)
7-90 Union 5 ±0.3 Nm (44 ±2.7 lbf in.)

Torque Values
Table 802 (Sheet 2 of 2)

IPL Fig.
and Length of Unloaded Spring Test Length of Spring Test Spring Force
Item No.

63.05 mm (2.482 in.) 117.45 ±5 N (26.40 ±1.124 lbf)

2-240 88.34 mm (3.478 in.)
36.2 mm (1.425 in.) 242.17 5 N (54.44 1.12 lbf)

4-220 11.0 mm (0.43 in.) 7.3 mm (0.29 in.) 3.53 0.20 N (0.794 0.045 lbf)

Spring Properties
Table 803

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IPL Fig.
and Length of Unloaded Spring Test Length of Spring Test Spring Force
Item No.

12.80 mm (0.504 in.) 56 ±2 N (12.59 ±0.45 lbf)

4-330 16.30 mm (0.642 in.)
10.90 mm (0.429 in.) 86 3 N (19.33 0.67 lbf)

4.00 mm (0.157 in.) 3.59 ±0.2 N (0.81 ±0.04 lbf)

6-40 7.51 mm (0.296 in.)
3.6 mm (0.142 in.) 4.00 0.2 N (0.90 0.04 lbf)

5.7 mm (0.22 in.) 7 ±2 N (1.57 ±0.45 lbf)

6-70 9.63 mm (0.38 in.)
5.3 mm (0.21 in.) 7.71 2 N (1.73 0.45 lbf)

9.0 mm (0.35 in.) 12.01 ±0.1 N (2.70 ±0.02 lbf)

8-30 11 mm (0.43 in.)
8.0 mm (0.31 in.) 18.16 0.1 N (4.08 0.02 lbf)

Spring Properties
Table 803

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SPECIAL TOOLS, FIXTURES AND EQUIPMENT

1. General

A. This section gives data about special tools, fixtures and equipment necessary for the
maintenance of the unit.

B. The applicable special tools, fixtures and equipment are given in Table 901 and Figure 901.
NOTE: Approved alternatives can be used for given items.

FIG. 901
PART NUMBER NOMENCLATURE USAGE
REF. NO.

1 52234A1000-01 Test Box Activation and indication of the solenoid valve

assembly (1-230) and the microswitch
assembly (1-140)

2 52271B0000-01 Pack-Acceptance Test- Indication of the potentiometer angle

or Set
52271C0000-01
or
52271D0000-01
or
52271E0000-01

2.1 SC00-125 Power Supply Cable To connect the test set

2.2 52271B0700-01 Test Cable To connect the TAV

2.3 52271B0800-01 Flap Angle Cable To connect the potentiometer

3 52347A0123-02 Test Block Test of the solenoid valve assembly (1-230)

4 53042A0000-01 Angle Measuring Fixture Valve flap angle indication

5 56507S0000 Seal Guide Set Installation of the seals

5.1 56507S0001 Seal Guide N/A

5.2 56507S0002 Seal Guide Installation of the preformed packings (4-20

and 4-40)

5.3 56507S0003 Holding Block Storage of the seal guides

5.4 56507S0100 Seal Installation Tool Installation of the preformed packings (4-200
and 4-390)

6 56526S0000 Mounting Device Removal and Installation of the cover (2-140)

7 56528S0000 Extractor Removal of the bush (3-30)

Special Tools, Fixtures and Equipment

Table 901 (Sheet 1 of 2)

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FIG. 901
PART NUMBER NOMENCLATURE USAGE
REF. NO.

8 56837A0000-01 Holding Fixture Assembly of the PRV

use with: Support

P/N: 87880

Fa. Hoffmann GmbH

Qualitaetswerkzeuge
Haberlandstrasse 55
81241 Muenchen
Postfach 600452
PLZ 81204 Muenchen

9 58202A0000-01 Installation Tool Installation of the valve shaft (3-250)

9.1 58202-0001 Insertion Sleeve

9.2 58202-0002 Guide Sleeve

9.3 58202-0003 Guide Ring

9.4 58202-0004 Threaded Stud

9.5 DIN6325-4m6x12 Pin

10 58222A0000-01 Holding Fixture Installation of the valve plate (3-90)

Special Tools, Fixtures and Equipment

Table 901 (Sheet 2 of 2)

Special Tools, Fixtures and Equipment

Figure 901 (Sheet 1 of 3)

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2.3

2.2

2.1

Special Tools, Fixtures and Equipment

Figure 901 (Sheet 2 of 3)

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5.1

5.2

5.4
5.3
6

10
5

9.2

9.1

8
9

9.5

9.4
9.3

Special Tools, Fixtures and Equipment

Figure 901 (Sheet 3 of 3)

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ILLUSTRATED PARTS LIST

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INTRODUCTION

1. General

The Illustrated Parts List (IPL) gives data for the identification of replacement parts for this unit.
The part numbers are given in the sequence of disassembly. The IPL is divided into this
introduction which gives data and instructions for the use of the IPL, and these sections:
- Numerical Index (NI)
- Detailed Parts List (DPL).

A. Numerical Index

The NI shows all of the part numbers given in the detailed parts list in alpha-numeric
sequence. The 'Total Required' column shows the total quantity for each figure and item
number of the PN. A column is given for airline use and optional PNs.

B. Detailed Parts List

(1) The DPL gives part numbers and their related illustrations. The indenture system which
shows the relation of the data, is given below. A column is given for airline use.

1234567
Assembly
Attaching parts for assembly
.Detail parts for assembly
.Sub assembly
.Attaching parts for sub assembly
..Detail parts for sub assembly
..Sub-sub assembly
..Attaching parts for sub-sub assembly
...Detail parts for sub-sub assembly

(2) The attachment parts are shown directly after the part which they attach. They are
given the same indenture as the item they attach and are identified “Attaching Parts”
followed with asterisks.
NOTE: A dash (-) in front of the item number in the “Figure and Item” column identifies
items that are not illustrated.

(3) Vendor Codes have the prefix “V” and are given in brackets.

C. How to use the IPL

(1) Part number known

When a PN is known, refer to the NI. The NI will give you the figure and index number
for the part. Then use the figure and index number to refer to data about the part in the
applicable illustration or the DPL.

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(2) Part Number unknown

When a PN is unknown, find the illustration that shows the applicable part. Then use the
item number given in the illustration to refer to data about the part in the DPL.

D. Symbols and Abbreviations

ALT FROM PN - This identifies an alternative PN specified as a part that is functionally and
physically interchangeable after re-work.

AR - “As Required”. This shows that the part is used in a quantity as necessary.

LH OR RH - A left-hand or right-hand part.

LM - A finished part made from raw materials, such as seals, hinge strips, extrusions, etc.

NHA - Next Higher Assembly.

NP - 'Not procurable'. This shows that the part cannot be ordered.

OPT PN - This shows an 'optional' PN that is fully interchangeable with the part in the part-
number column.

ORDER OVERLENGTH PN - This shows a PN more than fifteen characters long which is
too large for the part number column.

OVERSIZE/UNDERSIZE - This shows an oversize or undersize part.

RF - This shows an item given for reference data.

POST SB - This shows the Service Bulletin which has an effect on the item shown in the
part number column.

SEE CMM - Refer to the Component Maintenance Manual.

SEE FIG XXX FOR DET OR NHA - This shows the IPL location where detail-breakdown
locations of a sub-assembly are shown and/or the next highest assembly is shown.

SEL FROM - This shows the part which must be selected as necessary from a group of
parts with a basic PN.

SUPSD BY ITEM - Identifies a part superseded or replaced in the unit or assembly and is
cross-referenced to the new part.

SUPSDS ITEM - Identifies the new part used in the unit or assembly and is cross-referenced
to the part it superseded or replaced.

E. Effectivity Code

A letter (A, B, etc.) shows a variant to the related NHA where applicable.

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F. Vendor Codes

(1) Vendor codes are given in the nomenclature column of the DPL to show the source of
procurement of vendor items. These codes and the address of the vendors are given in
Table 1001. When no code is given, for other than standard parts, the item is a Liebherr
part. Alternatively the Vendor address is given in the nomenclature column.

CODE VENDOR NAME AND ADDRESS

C2169 VISHAY ELECTRONIC GmbH

GESCHAEFTSBEREICH DRALONIC
Geheimrat-Rosenthal Strasse 100
95100 Selb
Germany

D1333 PARKER-HANNIFIN GMBH

Praedifa-Packing Division
Postfach 1641
74306 Bietingheim-Bissingen
Germany

D1973 RAYCHEM GmbH

Haidgraben 6
85521 Ottobrunn
Germany

D2457 SKF KUGELLAGERFABRIKEN GmbH

Ernst-Sachs-Strasse 2
97421 Schweinfurt
Germany

D8496 MAGNET-SCHULZ GMBH & CO. KG

Allgaeuer Strasse 30
87700 Memmingen
Germany

D9893 LIEBHERR-AEROSPACE LINDENBERG GmbH

Postfach 1363
88153 Lindenberg/Allgaeu
Pfaender Strasse 50-52
88161 Lindenberg/Allgaeu
Germany

F0225 FRAMATOME CONNECTORS FRANCE

145 Rue Yves le Coz
78035 Versailles
France

Vendor Codes and Addresses

Table 1001 (Sheet 1 of 2)

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CODE VENDOR NAME AND ADDRESS

F6198 AEROSPATIALE
37 Boulevard de Montmorency
75781 Paris CEDEX 16
France

K3860 MOSS PLASTIC PARTS LTD

Langford Lane
Kidlington, OXON, OX5 1HX
United Kingdom

U1068 DOWTY SEALS LTD

Ashchurch
Tewkesbury GL20 8J5
United Kingdom

04319 ADVANCED PRODUCTS CO

33 DEFCO
Park RD
North Heaven Court
PSC 06473
USA

71687 COOK AIRTOMIC

A DOVER RESOURCES CO
916 S 8th Street
PO Box 1038
Louisville KY
PSC40201-1038
USA

75237 KAYNAR TECHNOLOGIES INC

MICRODOT DIV
190 W Crowther Ave
Placentia CA
PSC92670
USA

Vendor Codes and Addresses

Table 1001 (Sheet 2 of 2)

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(2) If the item is a standard part, Table 1002 gives a list of the standard agencies from
whom details can be obtained.

CODE STANDARD AGENCY AND ADDRESS

D8442 NORMENSTELLE LUFTFAHRT

Kamekestrasse 2 - 8
50672 Koeln
Germany

F0111 BNAE (BUREAU DE NORMALISATION DE

L‘ AÉRONAUTIQUE ET DE L‘ ESPACE)
Technopolis 54
199 Rue Jean-Jacques Rousseau
92138 Issy les Moulineaux
France

K7766 BRITISH STANDARDS INSTRUCTION

389 Chisick High Road
London 4W 4AL
United Kingdom

80205 NATIONAL AEROSPACE STANDARDS

COMMITTEE AEROSPACE INDUSTRIES
ASSOCIATION OF AMERICA INC
1250 Eye St NW
Washington DC 20005
USA

81349 MILITARY SPECIFICATIONS

Promulgated by Military departments/agencies
under authority of Defense Standardization Manual

88044 AERONAUTICAL STANDARDS GROUP

DEPT OF NAVY AND AIR FORCE
USA

96906 MILITARY STANDARDS

Promulgated by military departments under
authority of defense
Standardization Manual 4120 3-M
USA

Standard Agencies and Addresses

Table 1002

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746A0000

NUMERICAL INDEX

FIG. ITEM TOTAL

PART NUMBER AIRLINE STOCK NO.
NUMBER NUMBER REQ‘D

ADRW6000ZZ-T66K2174 9006A0074-01 3 130A 1

3 220A 1
ALB21646 9116B0001-01 3 80A 1
AN320C3 1 300A 2
AN779-4D 1 70A 1
AN929L4 1 20A 1
DR25-1-8 5 110A 1
ERH10-1KP0RM1PCT RK501 5 70A 1
LN7-2M6X20 8 10A 1
LN9338-06 2 190A 2
MLA001917-03-05-4 3 150A 1
3 240A 1
MS21043-04 2 150A 16
5 40A 1
MS21043-08 2 270A 4
MS21043-3 3 50A 2
MS21209C0410 2 310B 6
(SUPSDS ITEM 310A)
(SUPSDS ITEM 110A) 4 110B 2
MS21209C0415 4 130B 3
(SUPSDS ITEM 130A)
(SUPSDS ITEM 440A) 4 440B 3
MS21209C0610 2 320B 6
(SUPSDS ITEM 320A)
(SUPSDS ITEM 120A) 4 120B 4
(SUPSDS ITEM 430A) 4 430B 16
MS24630-1 1 360A 4
MS24665-170 1 290A 2

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COMPONENT MAINTENANCE MANUAL

746A0000

NUMERICAL INDEX (Continued)

FIG. ITEM TOTAL

PART NUMBER AIRLINE STOCK NO.
NUMBER NUMBER REQ‘D

MS24677-14 2 80B 1
(SUPSDS ITEM 080A)
MS9068-011 1 210A 1
MS9068-014 1 215A 1
250A 1
MS9068-015 4 20A 1
MS9068-041 3 40A 1
MS9385-01 3 20A 1
MS9385-04 7 80A 1
MS9385-05 7 50A 1
MS9385-06 4 40A 1
MS9385-11 7 20A 1
MS9386-008 7 30A 1
MS9386-010 4 200A 1
MS9386-010 4 390A 1
MS9386-011 7 70A 1
M16878-4DFE9 ZC003 5 120A 1
NAS1101E02-3 5 80A 2
NAS1101E04-3 4 60A 2
NAS1101E04-4 5 20A 3
NAS1101E04-5 4 180A 3
4 370A 3
NAS1101E04-7 2 170A 16
5 30A 1
NAS1101E04H6 2 20A 6
NAS1101E06-16 1 160A 2
NAS1101E06-20 4 90A 4
NAS1101E06-6 4 80A 2
4 250A 5

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COMPONENT MAINTENANCE MANUAL

746A0000

NUMERICAL INDEX (Continued)

FIG. ITEM TOTAL

PART NUMBER AIRLINE STOCK NO.
NUMBER NUMBER REQ‘D

NAS1101E06-7 1 150A 2
NAS1101E06H6 1 110A 2
4 260A 1
NAE08-6 2 110A 4
3 180A 4
NAS1102E02-3 6 20A 4
NAS1102E3-14 3 70A 2
NAS1131E1 1 200A 4
NAS1131E18 1 200B 4
1 240A 4
NAS1132E4 2 260A 4
NAS1149C0316R 2 60A 1
NAS1149CN216R 5 90A 2
NAS1149CN416R 5 50A 1
NAS509-3C 1 40A 1
4 300A 1
NAS563C27 4 290B 1
(SUPSDS ITEM 290A)
NAS6703HU4 2 50A 1
NSA5042C04-440 1 330A 2
NSA936501TA2202 5 60A 1
RNF100-3-32BLACK ZS000 5 100A 1
RNF3000-39-13-2 1 225A 1
RNF3000-39-13-6 1 260A 1
SP127A 2 30A 6
SP127A 2 160A 32
4 190A 3
4 380A 3
SP127B 1 120A 2

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COMPONENT MAINTENANCE MANUAL

746A0000

NUMERICAL INDEX (Continued)

FIG. ITEM TOTAL

PART NUMBER AIRLINE STOCK NO.
NUMBER NUMBER REQ‘D

1 170A 4
4 100A 6
4 270A 5
SP127C 2 90A 1
2 120A 4
2 280A 8
3 190A 4
SP127D 1 310A 2
2 100A 2
3 60A 2
(SUPSDS ITEM 310A) 4 310B 1
SP127E 1 320A 2
V209C02-0086 5 140A 2
V209C04-0112 2 310A 6
(SUPSD BY ITEM 310B)
(SUPSD BY ITEM 110B) 4 110A 2
5 150A 4
V209C04-0168 4 130A 3
(SUPSD BY ITEM 130B)
(SUPSD BY ITEM 440B) 4 440A 3
V209C06-0138 2 320A 6
(SUPSD BY ITEM 320B)
(SUPSD BY ITEM 120B) 4 120A 4
(SUPSD BY ITEM 430B) 4 430A 16
V209C08-0164 3 290A 8
099A1027-01 1 350A 1
10528 1 400A 1
11041 1 410A 1
23203UJ0040 3 110A 2

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COMPONENT MAINTENANCE MANUAL

746A0000

NUMERICAL INDEX (Continued)

FIG. ITEM TOTAL

PART NUMBER AIRLINE STOCK NO.
NUMBER NUMBER REQ‘D

300-009-8825-05 1 60A 2
34282 1 380A 2
746-0003 2 210A 1
746-0004 2 230A 1
(SUPSD BY ITEM 230B)
746-0005 2 140A 1
746-0006 2 250A 1
746-0008 1 340A 4
746-0023 1 100A 1
746-0026 2 10A 1
746-0040 3 260A 1
746-0042 2 230B 1
(SUPSDS ITEM 230A)
746-0044 3 140A 1
3 230A 1
746-0046 3 250A 1
746-0049 3 120A 1
746-0050 3 210A 1
746-0051 3 30A 1
746-0052 3 160B 1
(SUPSDS ITEM 160A)
746-0055 2 70A 1
746-0062 1 220A 1
(SUPSD BY ITEM 220B)
746-0066 2 200A 1
746-0067 1 220B 1
(SUPSDS ITEM 220A)
746-0104 3 300A 1
746-0303 2 330A 1

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COMPONENT MAINTENANCE MANUAL

746A0000

NUMERICAL INDEX (Continued)

FIG. ITEM TOTAL

PART NUMBER AIRLINE STOCK NO.
NUMBER NUMBER REQ‘D

746-0504 8 20A 1
(SUPSD BY ITEM 020B)
746-0507 8 20B 1
(SUPSDS ITEM 020A)
746-1201 5 160A 1
746-1501 7 90A 1
746-1502 7 60A 1
746A0000-06 1 1A 1
746A0000-06REF1 1 370A 1
2 1A 1
746A0000-06REF2 2 340A 1
3 1A 1
746A0100-03 3 280A 1
746A0200-01 1 10A 1
746A0300-03 2 300A 1
746A0500-02 1 140A 1
8 1A 1
746A0500-02REF1 8 40A 1
746A0800-01 3 170A 1
746A0900-01 1 90A 1
746A1200-01 5 130A 1
746A1400-01 1 190A 1
5 1A 1
746A1500-01 1 270A 1
7 1A 1
746A1600-01 3 90A 1
748-0014 3 160A 1
(SUPSD BY ITEM 160B)
748-0016 2 80A 1

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746A0000

NUMERICAL INDEX (Continued)

FIG. ITEM TOTAL

PART NUMBER AIRLINE STOCK NO.
NUMBER NUMBER REQ‘D

(SUPSD BY ITEM 080B)

750-0117 3 100A 1
819A0000-03 1 190B 1
85005585A 1 390A 3
8525-02H8B3APNH 5 10A 1
870-0009 4 310A 1
(SUPSD BY ITEM 310B)
870-0012 4 290A 1
(SUPSD BY ITEM 290B)
872-0001 4 240A 1
872-0002 4 320A 1
872-0005 4 230A 1
4 400A 1
872-0011 4 210A 1
872-0018 4 50A 1
872-0019 4 280A 1
872-0020 4 170A 1
872-0021 4 410A 4
872-0023 4 350A 1
872-0027 4 360A 1
872-0031 4 160A 1
872-0202 4 450A 1
872-0404 4 140A 1
872A0000-05 1 280A 1
4 1A 1
872A0200-02 4 420A 1
872A0300-01 4 150A 1
4 340A 1
872A0400-04 4 70A 1

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COMPONENT MAINTENANCE MANUAL

746A0000

NUMERICAL INDEX (Continued)

FIG. ITEM TOTAL

PART NUMBER AIRLINE STOCK NO.
NUMBER NUMBER REQ‘D

872A0600-04 4 10A 1
895-0101 6 60A 1
895-0102 6 30A 1
895-0103 6 50A 1
895A0000-01 1 230A 1
6 1A 1
895A0100-01 6 10A 1
9003A0101-01 3 10A 1
9026A0028-01 7 40A 1
9027A0083-02 2 240A 1
9027A0084-01 6 40A 1
9027A0085-01 6 70A 1
9027A0087-01 8 30A 1
9027A0089-01 4 220A 1
9027A0096-01 4 330A 1
9032B0014-01 3 200A 2
9048A0015-02 2 40A 1
9048A0016-02 1 180A 1
9063A0006-01 6 80A 1
9079B0001-01 2 220A 1
9099A0001-01 2 290A 1
9099A0002-01 1 130A 1
9099A0003-01 2 130A 1
9138A0001-01 3 270A 1
93-8827 6 90A 1
938287 9017C0001-01 1 30A 1
962-0042 7 10A 1
962-0053 1 80A 1
962-0054 1 50A 1

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746A0000

NUMERICAL INDEX (Continued)

FIG. ITEM TOTAL

PART NUMBER AIRLINE STOCK NO.
NUMBER NUMBER REQ‘D

962A0900-02 2 180A 1

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746A0000

Intentionally left blank

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DETAILED PARTS LIST

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130 110
120
380 370 .... .... ..... ....
. . 100
..... ..
360
350
180 140

.... .....
...........
60 ..
70 390
60
170
170 150 160

20

80
30 10 380
50 40
240
230 300 90
290
310

260
340
250

390
270

200

320
280
220
190 210
400
410 340
390
330

Pressure Regulating Valve

Figure 1

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746A0000

UNITS
FIG. AIRLINE EFF.
PART NUMBER NOMENCLATURE PER
ITEM STOCK NO. CODE
1234567 ASSY
1
- 1A 746A0000-06 PRESSURE REGULATING VALVE RF
POST SB746-21-04
10A 746A0200-01 .TUBE ASSY 1
20A AN929L4 .CAP, PRESSURE SEAL (V88044) 1
30A 938287 .SEAL, THREAD (VD1333) 1
OPT PN
9017C0001-01
40A NAS509-3C .NUT, DRILLED JAM (V80205) 1
50A 962-0054 .BOLT 1
60A 300-009-8825-05 .SEAL, BONDED (VU1068) 2
70A AN779-4D .CONNECTOR, MULTIPLE (V88044) 1
FLUID
80A 962-0053 .BOLT, FLUID PASSAGE 1
90A 746A0900-01 .TUBE ASSY 1
100A 746-0023 .ADAPTOR, PIPE 1
ATTACHING PARTS
110A NAS1101E06H6 .SCREW, MACHINE-FLAT (V80205) 2
120A SP127B .WASHER (VK7766) 2
***
130A 9099A0002-01 .GASKET 1
140A 746A0500-02 .MICROSWITCH ASSY 1
SEE 21-62-11-08 FOR DET
ATTACHING PARTS
150A NAS1101E06-7 .SCREW, MACHINE-FLAT (V80205) 2
160A NAS1101E06-16 .SCREW, MACHINE-FLAT (V80205) 2
170A SP127B .WASHER (VK7766) 4
***
180A 9048A0016-02 .GASKET 1
MISSING ITEMS AND VARIANTS ARE NOT APPLICABLE
- ITEM NOT ILLUSTRATED

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UNITS
FIG. AIRLINE EFF.
PART NUMBER NOMENCLATURE PER
ITEM STOCK NO. CODE
1234567 ASSY
1
190A 746A1400-01 .SOLENOID DUMMY ASSY 1
ALT TO 190B
SEE 21-62-11-05 FOR DET
- 190B 819A0000-03 .VALVE ASSY, SOLENOID 1
ALT TO 190A
SEE 21-62-10-06 FOR DET
ATTACHING PARTS
200A NAS1131E1 .SCREW, MACHINE-FLAT (V80205) 190A 4
- 200B NAS1131E18 .SCREW, MACHINE-FLAT (V80205) 190B 4
***
210A MS9068-011 .PACKING, PREFORMED (V96906) 1
- 215A MS9068-014 .PACKING, PREFORMED (V96906) 190B 1
- 220A 746-0062 .PLUG NP 190A 1
(SUPSD BY ITEM 220B)
220B 746-0067 .PLUG 190A 1
(SUPSDS ITEM 220A)
-225A RNF3000-39-13-2 .SLEEVE, THERMOFIT (VD1973) 190B AR
230A 895A0000-01 .VALVE ASSY, SOLENOID 1
SEE 21-62-11-06 FOR DET
ATTACHING PARTS
240A NAS1131E18 .SCREW, MACHINE-FLAT (V80205) 4
***
250A MS9068-014 .PACKING, PREFORMED (V96906) 1
260A RNF3000-39-13-6 .SLEEVE, THERMOFIT (VD1973) AR
270A 746A1500-01 .FILTER ASSY 1
SEE 21-62-11-07 FOR DET
280A 872A0000-05 .VALVE, PRESSURE CONTROL 1
SEE 21-62-11-04 FOR DET
ATTACHING PARTS
290A MS24665-170 .PIN, COTTER (V96906) 2
MISSING ITEMS AND VARIANTS ARE NOT APPLICABLE
- ITEM NOT ILLUSTRATED

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746A0000

UNITS
FIG. AIRLINE EFF.
PART NUMBER NOMENCLATURE PER
ITEM STOCK NO. CODE
1234567 ASSY
1
300A AN320C3 .NUT, HEXAGON, (V88044) 2
CASTELLATED
310A SP127D .WASHER (VK7766) 2
320A SP127E .WASHER (VK7766) 2
330A NSA5042C04-440 .BOLT, HEXAGON HEAD (VF6198) 2
***
340A 746-0008 .BUSH, FLANGED 4
350A 099A1027-01 .PLATE, IDENTIFICATION 1
ATTACHING PARTS
360A MS24630-1 .SCREW, PAN HEAD (V96906) 4
***
370A 746A0000-06REF1 .ACTUATOR ASSY, PNEUMATIC NP 1
SEE 21-62-11-02 FOR DET
STORAGE PARTS
380A 34282 .CAP, PROTECTIVE (VK3860) 2
390A 85005585A .CAP, PROTECTIVE (VF0225) 3
400A 10528 .CAP, PROTECTIVE (VK3860) 1
410A 11041 .CAP, PROTECTIVE (VK3860) 1
***

MISSING ITEMS AND VARIANTS ARE NOT APPLICABLE

- ITEM NOT ILLUSTRATED

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220
230

140

200 20

30

10
...........
. ...... 40
...... .... ..........
. ..........
50
160
170
100
180 60
190
70
280 270
110 90

100 120 80
310
190
290 320
330 300
250
320
..
210 ... .....
.
280 ... . .....
260 ..........
. ......
....... 130
. .... ... ......
240 160 150

340

Pneumatic Actuator Assembly

Figure 2

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746A0000

UNITS
FIG. AIRLINE EFF.
PART NUMBER NOMENCLATURE PER
ITEM STOCK NO. CODE
1234567 ASSY
2
- 1A 746A0000-06REF1 ACTUATOR ASSY, PNEUMATIC NP RF
SEE 21-62-11-01 FOR NHA
10A 746-0026 .COVER 1
ATTACHING PARTS
20A NAS1101E04H6 .SCREW, MACHINE-FLAT (V80205) 6
30A SP127A .WASHER (VK7766) 6
***
40A 9048A0015-02 .GASKET 1
50A NAS6703HU4 .BOLT, HEXAGON HEAD (V80205) 1
60A NAS1149C0316R .WASHER (V80205) 1
70A 746-0055 .LEVER 1
ATTACHING PARTS
- 80A 748-0016 .BOLT, HEXAGON HEAD 1
(SUPSD BY ITEM 80B)
80B MS24677-14 .BOLT, HEXAGON HEAD (V96906) 1
(SUPSDS ITEM 80A)
90A SP127C .WASHER (VK7766) 1
***
100A SP127D .WASHER (VK7766) 2
110A NAS1101E08-6 .SCREW, MACHINE-FLAT (V80205) 4
120A SP127C .WASHER (VK7766) 4
130A 9099A0003-01 .GASKET 1
140A 746-0005 .COVER 1
ATTACHING PARTS
150A MS21043-04 .NUT, SELF-LOCKING (V96906) 16
160A SP127A .WASHER (VK7766) 32
170A NAS1101E04-7 .SCREW, MACHINE-FLAT (V80205) 16
***
MISSING ITEMS AND VARIANTS ARE NOT APPLICABLE
- ITEM NOT ILLUSTRATED

Page 1023
21-62-11 Jun 25/98
 LIEBHERR-AEROSPACE LINDENBERG GmbH

COMPONENT MAINTENANCE MANUAL

746A0000

UNITS
FIG. AIRLINE EFF.
PART NUMBER NOMENCLATURE PER
ITEM STOCK NO. CODE
1234567 ASSY
2
180A 962A0900-02 .EYE-END 1
190A LN9338-06 .NUT, HEXAGON (VD8442) 2
200A 746-0066 .SHAFT 1
210A 746-0003 .RETAINER 1
220A 9079B0001-01 .DIAPHRAGM 1
-230A 746-0004 .DISC 1
(SUPSD BY ITEM 230B)
230B 746-0042 .DISC 1
(SUPSDS ITEM 230A)
240A 9027A0083-02 .SPRING 1
250A 746-0006 .HOUSING 1
ATTACHING PARTS
260A NAS1132E4 .SCREW, MACHINE-FLAT (V80205) 4
270A MS21043-08 .NUT, SELF-LOCKING (V96906) 4
280A SP127C .WASHER (VK7766) 8
***
290A 9099A0001-01 .GASKET 1
300A 746A0300-03 .HOUSING ASSY 1
310A V209C04-0112 ..INSERT, COIL (V75237) 6
(SUPSD BY ITEM 310B)
310B MS21209C0410 ..INSERT, COIL (V96906) 6
(SUPSDS ITEM 310A)
320A V209C06-0138 ..INSERT, COIL (V75237) 6
(SUPSD BY ITEM 320B)
320B MS21209C0610 ..INSERT, COIL (V96906) 6
(SUPSDS ITEM 320A)
330A 746-0303 ..HOUSING 1
340A 746A0000-06REF2 .HOUSING ASSY, VALVE NP 1
SEE 21-62-11-03 FOR DET

MISSING ITEMS AND VARIANTS ARE NOT APPLICABLE

- ITEM NOT ILLUSTRATED

Page 1024
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COMPONENT MAINTENANCE MANUAL

746A0000

Intentionally left blank

Page 1025
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COMPONENT MAINTENANCE MANUAL

746A0000

120 260

130 270

140 DETAIL A

150
290
10
20

280 40

30
300

290

240

70 250
230

220
90
200

210 80

200 60
50
160

190 100
170 110
190
110

180

Valve Housing Assembly

Figure 3

Page 1026
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 LIEBHERR-AEROSPACE LINDENBERG GmbH

COMPONENT MAINTENANCE MANUAL

746A0000

UNITS
FIG. AIRLINE EFF.
PART NUMBER NOMENCLATURE PER
ITEM STOCK NO. CODE
1234567 ASSY
3
- 1A 746A0000-06REF2 HOUSING ASSY, VALVE NP RF
SEE 21-62-11-02 FOR NHA
10A 9003A0101-01 .BOLT, LOCKING 1
20A MS9385-01 .PACKING, PREFORMED (V96906) 1
30A 746-0051 .BUSH 1
40A MS9068-041 .PACKING, PREFORMED (V96906) 1
50A MS21043-3 .NUT, SELF-LOCKING (V96906) 2
60A SP127D .WASHER (VK7766) 2
70A NAS1102E3-14 .SCREW, MACHINE-FLAT (V80205) 2
80A ALB21646 .RING, SEAL ASSY (V71687) 1
OPT PN
9116B0001-01
90A 746A1600-01 .PLATE, VALVE 1
100A 750-0117 .LEVER, MANUAL 1
ATTACHING PARTS
110A 23203UJ0040 .RING, RETAINING (VF0111) 2
***
120A 746-0049 .SLEEVE, DISTANCE 1
130A ADRW6000ZZ .BEARING, BALL (VD2457) 1
ORDER OVERLGTH PN
ADRW6000ZZ-T66K2174
OPT PN
9006A0074-01
140A 746-0044 .WASHER 1
150A MLA001917 .RING, SEAL (V04319) 1
ORDER OVERLGTH PN
MLA001917-03-05-4
-160A 748-0014 .COVER NP 1
(SUPSD BY ITEM 160B)
160B 746-0052 .COVER 1
(SUPSDS ITEM 160A)
MISSING ITEMS AND VARIANTS ARE NOT APPLICABLE
- ITEM NOT ILLUSTRATED

Page 1027
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 LIEBHERR-AEROSPACE LINDENBERG GmbH

COMPONENT MAINTENANCE MANUAL

746A0000

UNITS
FIG. AIRLINE EFF.
PART NUMBER NOMENCLATURE PER
ITEM STOCK NO. CODE
1234567 ASSY
3
170A 746A0800-01 .BONDING JUMPER 1
ATTACHING PARTS
180A NAS1101E08-6 .SCREW, MACHINE-FLAT (V80205) 4
190A SP127C .WASHER (VK7766) 4
***
200A 9032B0014-01 .SHIM, SPRING 2
210A 746-0050 .SHIM 1
220A ADRW6000ZZ .BEARING, BALL (VD2457) 1
ORDER OVERLGTH PN
ADRW6000ZZ-T66K2174
OPT PN
9006A0074-01
230A 746-0044 .WASHER 1
240A MLA001917 .RING, SEAL (V04319) 1
ORDER OVERLGTH PN
MLA001917-03-05-4
250A 746-0046 .SHAFT, VALVE 1
260A 746-0040 .FITTING 1
270A 9138A0001-01 .ABSORBER 1
280A 746A0100-03 .HOUSING ASSY, VALVE 1
290A V209C08-0164 ..INSERT, COIL (V75237) 8
300A 746-0104 ..HOUSING 1

MISSING ITEMS AND VARIANTS ARE NOT APPLICABLE

- ITEM NOT ILLUSTRATED

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COMPONENT MAINTENANCE MANUAL

746A0000

Intentionally left blank

Page 1029
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 LIEBHERR-AEROSPACE LINDENBERG GmbH

COMPONENT MAINTENANCE MANUAL

746A0000

410
430

400
430
20
30

450
440 410
390
380 10

360
370
40
350
90

100
60

50 340
110
120 330
140
320
80
240
100
230

130 270
220
250 310
210
200 190 280 300

170 180
290
260
160

150

Pressure Control Valve

Figure 4

Page 1030
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 LIEBHERR-AEROSPACE LINDENBERG GmbH

COMPONENT MAINTENANCE MANUAL

746A0000

UNITS
FIG. AIRLINE EFF.
PART NUMBER NOMENCLATURE PER
ITEM STOCK NO. CODE
1234567 ASSY
4
- 1A 872A0000-05 VALVE, PRESSURE CONTROL RF
SEE 21-62-11-01 FOR NHA
10A 872A0600-04 .UNION, FLARELESS TUBE 1
20A MS9068-015 .PACKING, PREFORMED (V96906) 1
30A 872-0025 .UNION 1
40A MS9385-06 .PACKING, PREFORMED (V96906) 1
50A 872-0018 .PLATE 1
ATTACHING PARTS
60A NAS1101E04-3 .SCREW, MACHINE-FLAT (V80205) 2
***
-70A 872A0400-04 .HOUSING ASSY 1
ATTACHING PARTS
80A NAS1101E06-6 .SCREW, MACHINE-FLAT (V80205) 2
90A NAS1101E06-20 .SCREW, MACHINE-FLAT (V80205) 4
100A SP127B .WASHER (VK7766) 6
***
110A V209C04-0112 ..INSERT, COIL (V75237) 2
(SUPSD BY ITEM 110B)
-110B MS21209C0410 ..INSERT, COIL (V96906) 2
(SUPSDS ITEM 110A)
120A V209C06-0138 ..INSERT, COIL (V75237) 4
(SUPSD BY ITEM 120B)
-120B MS21209C0610 ..INSERT, COIL (V96906) 4
(SUPSDS ITEM 120A)
130A V209C04-0168 ..INSERT, COIL (V75237) 3
(SUPSD BY ITEM 130B)
-130B MS21209C0415 ..INSERT, COIL (V96906) 3
(SUPSDS ITEM 130A)
140A 872-0404 ..HOUSING 1
150A 872A0300-01 .DIAPHRAGM 1
MISSING ITEMS AND VARIANTS ARE NOT APPLICABLE
- ITEM NOT ILLUSTRATED

Page 1031
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 LIEBHERR-AEROSPACE LINDENBERG GmbH

COMPONENT MAINTENANCE MANUAL

746A0000

UNITS
FIG. AIRLINE EFF.
PART NUMBER NOMENCLATURE PER
ITEM STOCK NO. CODE
1234567 ASSY
4
160A 872-0031 .VALVE, POPPET 1
170A 872-0020 .SEAT, VALVE 1
ATTACHING PARTS
180A NAS1101E04-5 .SCREW, MACHINE-FLAT (V80205) 3
190A SP127A .WASHER (VK7766) 3
***
200A MS9386-010 .PACKING, PREFORMED (V96906) 1
210A 872-0011 .RETAINER, SPRING 1
220A 9027A0089-01 .SPRING 1
230A 872-0005 .PLUG, FIXED BLEED 1
240A 872-0001 .COVER 1
ATTACHING PARTS
250A NAS1101E06-6 .SCREW, MACHINE-FLAT (V80205) 5
260A NAS1101E06H6 .SCREW, MACHINE-FLAT (V80205) 1
270A SP127B .WASHER (VK7766) 5
***
280A 872-0019 .PLATE, GROUND 1
290A 870-0012 .BOLT, HEXAGON HEAD NP 1
(SUPSD BY ITEM 290B)
290B NAS563C27 .BOLT, HEXAGON HEAD (V80205) 1
(SUPSDS ITEM 290A)
300A NAS509-3C .NUT, DRILLED JAM (V80205) 1
310A 870-0009 .WASHER 1
(SUPSD BY ITEM 310B)
310B SP127D .WASHER (VK7766) 1
(SUPSDS ITEM 310A)
320A 872-0002 .DISC, SPRING 1
330A 9027A0096-01 .SPRING 1
MISSING ITEMS AND VARIANTS ARE NOT APPLICABLE
- ITEM NOT ILLUSTRATED

Page 1032
21-62-11 Jun 25/98
 LIEBHERR-AEROSPACE LINDENBERG GmbH

COMPONENT MAINTENANCE MANUAL

746A0000

UNITS
FIG. AIRLINE EFF.
PART NUMBER NOMENCLATURE PER
ITEM STOCK NO. CODE
1234567 ASSY
4
340A 872A0300-01 .DIAPHRAGM 1
350A 872-0023 .PLUNGER 1
360A 872-0027 .GUIDE, FLANGED 1
ATTACHING PARTS
370A NAS1101E04-5 .SCREW, MACHINE-FLAT (V80205) 3
380A SP127A .WASHER (VK7766) 3
***
390A MS9386-010 .PACKING, PREFORMED (V96906) 1
400A 872-0005 .PLUG, FIXED BLEED 1
410A 872-0021 .BUSH 4
- 420A 872A0200-02 .HOUSING ASSY 1
430A V209C06-0138 ..INSERT, COIL (V75237) 16
(SPUSD BY ITEM 430B)
- 430B MS21209C0610 ..INSERT, COIL (V96906) 16
(SUPSDS ITEM 430A)
440A V209C04-0168 ..INSERT, COIL (V75237) 3
(SPUSD BY ITEM 440B)
- 440B MS21209C0415 ..INSERT, COIL (V96906) 3
(SUPSDS ITEM 440A)
450A 872-0202 ..HOUSING 1

MISSING ITEMS AND VARIANTS ARE NOT APPLICABLE

- ITEM NOT ILLUSTRATED

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COMPONENT MAINTENANCE MANUAL

746A0000

140 120
110

90
80

70

120
110

100
120

40
50
60

150

10
160

20
150

30

Solenoid Dummy Assembly

Figure 5

Page 1034
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 LIEBHERR-AEROSPACE LINDENBERG GmbH

COMPONENT MAINTENANCE MANUAL

746A0000

UNITS
FIG. AIRLINE EFF.
PART NUMBER NOMENCLATURE PER
ITEM STOCK NO. CODE
1234567 ASSY
5
- 1A 746A1400-01 SOLENOID DUMMY ASSY RF
SEE 21-62-11-01 FOR NHA
10A 8525-02H8B3APNH .CONNECTOR, RECEPTACLE (VF0225) 1
ATTACHING PARTS
20A NAS1101E04-4 .SCREW, FILLISTER HEAD (V80205) 3
30A NAS1101E04-7 .SCREW, FILLISTER HEAD (V80205) 1
40A MS21043-04 .NUT, SELF-LOCKING (V96906) 1
50A NAS1149CN416R .WASHER (V80205) 1
60A NSA936501TA2202 .LUG, TERMINAL (VF6198) 1
***
70A ERH10-1KP0RM .RESISTOR, POWER (VC2169) 1
1KΩ, 1%, 10 WATT
ORDER OVERLGTH PN
ERH10-1KP0RM1PCT
OPT PN
RK501
ATTACHING PARTS
80A NAS1101E02-3 .SCREW, FILLISTER HEAD 2
90A NAS1149CN216R .WASHER 2
***
100A RNF100-3-32 .SLEEVE, THERMOFIT (VD1973) AR
ORDER OVERLGTH PN
RNF100-3-32BLACK
OPT PN
ZS000
110A DR25-1-8 .SLEEVE, THERMOFIT (VD1973) AR
120A M16878-4DFE9 .WIRE, AWG22, WHITE (V81349) AR
OPT PN
ZC003
-130A 746A1200-01 .BRACKET, ASSY 1
140A V209C02-0086 ..INSERT, COIL (V75237) 2
MISSING ITEMS AND VARIANTS ARE NOT APPLICABLE
- ITEM NOT ILLUSTRATED

Page 1035
21-62-11 Jun 25/98
 LIEBHERR-AEROSPACE LINDENBERG GmbH

COMPONENT MAINTENANCE MANUAL

746A0000

UNITS
FIG. AIRLINE EFF.
PART NUMBER NOMENCLATURE PER
ITEM STOCK NO. CODE
1234567 ASSY
5
150A V209C04-0112 ..INSERT, COIL (V75237) 4
160A 746-1201 ..BRACKET 1

MISSING ITEMS AND VARIANTS ARE NOT APPLICABLE

- ITEM NOT ILLUSTRATED

Page 1036
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LIEBHERR-AEROSPACE LINDENBERG GmbH

COMPONENT MAINTENANCE MANUAL

746A0000

Intentionally left blank

Page 1037
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 LIEBHERR-AEROSPACE LINDENBERG GmbH

COMPONENT MAINTENANCE MANUAL

746A0000

80

70

90

60

20 50
10

40

30

Solenoid Valve Assembly

Figure 6

Page 1038
21-62-11 Jun 25/98
 LIEBHERR-AEROSPACE LINDENBERG GmbH

COMPONENT MAINTENANCE MANUAL

746A0000

UNITS
FIG. AIRLINE EFF.
PART NUMBER NOMENCLATURE PER
ITEM STOCK NO. CODE
1234567 ASSY
6
- 1A 895A0000-01 VALVE ASSY, SOLENOID RF
SEE 21-62-11-01 FOR NHA
10A 895A0100-01 .VALVE ASSY NP 1
ATTACHING PARTS
20A NAS1102E02-3 .SCREW, MACHINE-FLAT 4
***
30A 895-0102 ..STOP 1
40A 9027A0084-01 ..SPRING 1
50A 895-0103 ..POPPET VALVE 1
60A 895-0101 ..VALVE SEAT 1
70A 9027A0085-01 .SPRING 1
80A 9063A0006-01 .SOLENOID 1
(INCOMPLETE BREAKDOWN)
90A 93-8827 ..CORE (D8496) 1

MISSING ITEMS AND VARIANTS ARE NOT APPLICABLE

- ITEM NOT ILLUSTRATED

Page 1039
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 LIEBHERR-AEROSPACE LINDENBERG GmbH

COMPONENT MAINTENANCE MANUAL

746A0000

10

40

30

20

60

50 90

70
80

Filter Assembly
Figure 7

Page 1040
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 LIEBHERR-AEROSPACE LINDENBERG GmbH

COMPONENT MAINTENANCE MANUAL

746A0000

UNITS
FIG. AIRLINE EFF.
PART NUMBER NOMENCLATURE PER
ITEM STOCK NO. CODE
1234567 ASSY
7
-1A 746A1500-01 FILTER ASSY RF
SEE 21-62-11-01 FOR NHA
10A 962-0042 .COVER 1
20A MS9385-11 .PACKING, PREFORMED (V96906) 1
30A MS9386-008 .PACKING, PREFORMED (V96906) 1
40A 9026A0028-01 .FILTER 1
50A MS9385-05 .PACKING, PREFORMED (V96906) 1
60A 746-1502 .BODY 1
70A MS9386-011 .PACKING, PREFORMED (V96906) 1
80A MS9385-04 .PACKING, PREFORMED (V96906) 1
90A 746-1501 .UNION 1

MISSING ITEMS AND VARIANTS ARE NOT APPLICABLE

- ITEM NOT ILLUSTRATED

Page 1041
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 LIEBHERR-AEROSPACE LINDENBERG GmbH

COMPONENT MAINTENANCE MANUAL

746A0000

40

10

30

20

Microswitch Assembly
Figure 8

Page 1042
21-62-11 Jun 25/98
 LIEBHERR-AEROSPACE LINDENBERG GmbH

COMPONENT MAINTENANCE MANUAL

746A0000

UNITS
FIG. AIRLINE EFF.
PART NUMBER NOMENCLATURE PER
ITEM STOCK NO. CODE
1234567 ASSY
8
-1A 746A0500-02 MICROSWITCH ASSY RF
SEE 21-62-11-01 FOR NHA
(INCOMPLETE BREAKDOWN)
10A LN7-2M6X20 .PIN (VD8442) 1
20A 746-0504 .LEVER 1
(SUPSD BY ITEM 20B)
20B 746-0507 .LEVER 1
(SUPSDS ITEM 20A)
30A 9027A0087-01 .SPRING 1
40A 746A0500-02REF1 .HOUSING NP 1

MISSING ITEMS AND VARIANTS ARE NOT APPLICABLE

- ITEM NOT ILLUSTRATED

Page 1043/1044
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