Inovel Parc Sud

BP 40
78140 VELIZY -- VILLACOUBLAY
FRANCE
FAX: 33 (0)1 40 83 02 00 – TEL: 33 (0)1 46 29 81 00
INTERNET: www.safranmbd.com

(F6137)

COMPONENT MAINTENANCE MANUAL

WITH
ILLUSTRATED PARTS LIST

CARBON BRAKE
ASSEMBLY

PN: C20544000
PRINTED IN FRANCE

The content of this document is the property of and contains information proprietary to MESSIER--BUGATTI--DOWTY, and recipient by
accepting this document agrees to this.
It must not be used for any purpose other than that for which it is supplied nor may information contained in it be divulged or reproduced
in whole or in part without MESSIER--BUGATTI--DOWTY prior written consent, except for internal use and, in that case, all information
reproduced must be protected by the MESSIER--BUGATTI--DOWTY proprietary legend.

C 2002

Revision No. 4 TP Page 1

Initial issue: APR 30/02 32--- 45--- 91 NOV 08/13
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

MESSIER-BUGATTI-DOWTY
Technical Publications
Inovel Parc Sud
BP 40
78140 VELIZY-VILLACOUBLAY
FRANCE
TEL: 33 (0)1 46 29 81 00
FAX: 33 (0)1 40 83 02 00

TRANSMITTAL SHEET

TO: HOLDERS OF COMPONENTS MAINTENANCE MANUAL FOR CARBON BRAKE ASSEMBLY ATA 32-45-91
Revision No. 4, dated NOV 08/13 is attached and covers all components held by
every operator.

FILING INSTRUCTIONS

NOTE: Before introducing this revision make sure previous revisions are
incorporated.

- The pages unaffected by the revision were reprinted, but without any
modification of the content, except the pages listed on the “LIST OF
EFFECTIVE PAGES” and designated as follow:

R = Revised (to be replaced)

D = Deleted (to be removed)
N = New (to be incorporated)

- Make sure that the content of the manual agrees with the “LIST OF EFFECTIVE
PAGES”.
- Update the “RECORD OF TEMPORARY REVISION” page accordingly.
- File the “TRANSMITTAL SHEET” separately.
- Remove and destroy the pages that are affected by the revision.
HIGHLIGHTS

Revision No. 4 - NOV 08/13

PAGES DESIGNATION DESCRIPTION OF CHANGE

PRINTED IN FRANCE

TITLE PAGE R Logo Changed.

Address changed.
Copyright logo changed.
Revision No. 4 added.
RECORD OF REVISIONS
Page 1 R Revision No. 4 added.

RECORD OF TEMPORARY REVISIONS

Page 1 R TR 32-1 added.

RECORD OF SERVICE BULLETINS

Page 1 R SB C20544-32-050 added.

HIGHLIGHTS

32--- 45--- 91 Page 1

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 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

PAGES DESIGNATION DESCRIPTION OF CHANGE

LIST OF EFFECTIVE PAGES

Pages 1 and 2 R List updated to reflect this
revision.

TABLE OF CONTENTS
Pages 1 to 3 R List updated to reflect this
revision.

INTRODUCTION
Page 1 R Text modified, “Manual 32-09-01”
replaced by “STANDARD PRACTICES
MANUAL (SPM) 32-09-01”.

Page 2 R Text modified.

DESCRIPTION AND OPERATION

Page 1 R Weight modified.
Text modified, “MIL-PRF-5606/F”
replaced by “MIL-PRF-5606H”.

TESTING AND FAULT ISOLATION

Page 1001 R Text added.
Page 1005 R Caution added.
Note added.
Text modified.
Pressure value modified.
Page 1006 R Pressure value modified.
Text modified.
PRINTED IN FRANCE

Text added.

DISASSEMBLY
Page 3001 R Tools table updated.
Page 3003 R Figure reference added.
Figure title added.
Page 3004 R Text added.
Page 3006 R Text modified.

HIGHLIGHTS

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 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

PAGES DESIGNATION DESCRIPTION OF CHANGE

REPAIR
Pages 6002 to 6004 R Text modified, “Section 61”
replaced by “Section 61A”.

Pages 6006 R Text modified, “Section 61”

replaced by “Section 61A”.

ASSEMBLY
Page 7001 R Text added.
Page 7002 R Text modified, “Section 27”
replaced by “Section 59”.

Page 7003 R Text modified, “MIL-T-5544”

replaced by “SAE-AMS2518”.
Page 7005 R Text modified.
Pages 7006 and 7007 R Text transferred.
Page 7008 R Text modified, “Section 27”
replaced by “Section 59”.
Text deleted.
Text transferred.
Page 7010 R Text added.
Text modified, “MIL-T-5544”
replaced by “SAE-AMS2518”.
Page 7014 N New page added.
Figure added.

FITS AND CLEARANCES - TORQUE

VALUES
PRINTED IN FRANCE

Page 8002 R Text deleted.

Note modified.

SPECIAL TOOLS, FIXTURES,

EQUIPMENT AND CONSUMABLES
Page 9001 R Text added.
Page 9002 R Text modified, “MIL-PRF-5606/F”
replaced by “MIL-PRF-5606H”.
Address modified.
Text modified, “MIL-G-4343B”
replaced by “SAE-AMS-G-4343”.

HIGHLIGHTS

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Part Number C20544000

PAGES DESIGNATION DESCRIPTION OF CHANGE

ILLUSTRATED PARTS LIST

Page 10004 R Text added.
Page 10005 R Vendor’s Code List completely
reissued.

Page 10006 R Text transferred.

Pages 10007 and 10008 R Numerical Index completely
reissued.
Page 10009 R Text transferred.
Page 10010 R Figure modified.
Figure transferred.
Page 10011 R Text transferred.
Page 10012 R Figure transferred.
Page 10013 R Text transferred.
Page 10014 R Figure transferred.
Pages 100015 to 10017 R Parts List completely reissued.
PRINTED IN FRANCE

HIGHLIGHTS

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 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

RECORD OF REVISIONS

Keep this record in front of the manual. When you get a revision, put the revision
pages into the manual. Write the revision number and date, the date at which the
revision is put into the manual and your initials.

REV ISSUE INSERTED REV ISSUE INSERTED

No. DATE DATE BY No. DATE DATE BY

1 NOV 24/03
2 JAN 19/07
3 JAN 28/10
4 NOV 08/13
PRINTED IN FRANCE

RECORD OF REVISIONS

32--- 45--- 91 Page 1

NOV 08/13
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

RECORD OF TEMPORARY REVISIONS

Keep this record in the first pages of the manual. When you get a temporary
revision, put the yellow revision pages into the manual opposite the pages changed
by this revision. Write the revision number, the date at which you put the revision
into the manual and your initials. Do not remove the yellow pages until a permanent
revision which contains these data.

TEMPORARY PAGE ISSUE BY DATE BY

REV. No. NUMBER DATE REMOVED

32-1 1/2 FEB 01/12

32-1 2/2 FEB 01/12
PRINTED IN FRANCE

RECORD OF TEMPORARY REVISIONS

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NOV 08/13
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

RECORD OF SERVICE BULLETINS

NOTE: The Service Letters (SL) are usually released to give general information.
But some Service Letters can contain more data on procedures or modifications
which were given to the equipment user. These Service Letters are thus shown
in the SERVICE LETTER Column.

SERVICE SERVICE DATE OF

BULLETIN LETTER REV INCORPORATION DESCRIPTION
NUMBER NUMBER NUMBER INTO MANUAL

F6137-32-851 1 JAN 28/10 Wheels and brakes aqueous

cleaning products.

C20544-32-050 0 NOV 08/13 The modifications consists

in replacing the lockwire
P/N 23320CA080 by a cotter
pin P/N MS24665-88.
PRINTED IN FRANCE

RECORD OF SERVICE BULLETINS

32--- 45--- 91 Page 1

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 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

LIST OF EFFECTIVE PAGES

SUBJECT PAGE DATE SUBJECT PAGE DATE

TITLE PAGE 1 NOV 08/13 1006 NOV 08/13

2 BLANK 1007 JAN 28/10
1008 JAN 19/07
HIGHLIGHTS 1 NOV 08/13
2 NOV 08/13 SCHEMATIC AND 2001 APR 30/02
3 NOV 08/13 WIRING DIAGRAM 2002 BLANK
4 NOV 08/13
DISASSEMBLY 3001 NOV 08/13
RECORD OF 1 NOV 08/13 3002 APR 30/02
REVISIONS 2 BLANK 3003 NOV 08/13
3004 NOV 08/13
3005 NOV 24/03
RECORD OF 1 NOV 08/13 3006 NOV 08/13
TEMPORARY 2 BLANK
REVISIONS
CLEANING 4001 JAN 28/10
4002 JAN 28/10
RECORD OF 1 NOV 08/13 4003 JAN 28/10
SERVICE 2 BLANK 4004 BLANK
BULLETINS
INSPECTION/ 5001 JAN 28/10
LIST OF 1 NOV 08/13 CHECK 5002 NOV 24/03
EFFECTIVE 2 NOV 08/13 5003 NOV 24/03
PAGES 5004 JAN 28/10
5005 JAN 19/07
5006 APR 30/02
TABLE OF 1 NOV 08/13 5007 JAN 28/10
CONTENTS 2 NOV 08/13 5008 JAN 28/10
3 NOV 08/13 5009 JAN 28/10
4 BLANK 5010 JAN 19/07

INTRODUCTION 1 NOV 08/13 REPAIR 6001 APR 30/02

2 NOV 08/13 6002 NOV 08/13
6003 NOV 08/13
DESCRIPTION AND 1 NOV 08/13 6004 NOV 08/13
PRINTED IN FRANCE

OPERATION 2 APR 30/02 6005 JAN 28/10

3 APR 30/02 6006 NOV 08/13
4 APR 30/02
5 JAN 28/10 ASSEMBLY 7001 NOV 08/13
6 APR 30/02 7002 NOV 08/13
7 JAN 28/10 7003 NOV 08/13
8 APR 30/02 7004 APR 30/02
9 APR 30/02 7005 NOV 08/13
10 APR 30/02 7006 NOV 08/13
7007 NOV 08/13
TESTING AND 1001 NOV 08/13 7008 NOV 08/13
FAULT 1002 JAN 28/10 7009 JAN 28/10
ISOLATION 1003 APR 30/02 7010 NOV 08/13
1004 JAN 19/07 7011 JAN 28/10
1005 NOV 08/13 7012 JAN 28/10
7013 JAN 28/10
7014 NOV 08/13

LIST OF EFFECTIVE PAGES

Revision No. 4
32--- 45--- 91 Page 1
NOV 08/13
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

SUBJECT PAGE DATE

FITS AND 8001 JAN 19/07

CLEARANCES 8002 NOV 08/13

SPECIAL TOOLS, 9001 NOV 08/13

FIXTURES, 9002 NOV 08/13
EQUIPMENT AND
CONSUMABLES

ILLUSTRATED 10001 APR 30/02

PARTS LIST 10002 APR 30/02
10003 APR 30/02
10004 NOV 08/13
10005 NOV 08/13
10006 NOV 08/13
10007 NOV 08/13
10008 NOV 08/13
10009 NOV 08/13
10010 NOV 08/13
10011 NOV 08/13
10012 NOV 08/13
10013 NOV 08/13
10014 NOV 08/13
10015 NOV 08/13
10016 NOV 08/13
10017 NOV 08/13
10018 BLANK

SPECIAL 11001 APR 30/02

PROCEDURES 11002 BLANK

REMOVAL 12001 APR 30/02

12002 BLANK

INSTALLATION 13001 APR 30/02

13002 BLANK

SERVICING 14001 APR 30/02

PRINTED IN FRANCE

14002 BLANK

STORAGE 15001 JAN 28/10

15002 JAN 28/10

REWORK 16001 APR 30/02

16002 JAN 28/10

LIST OF EFFECTIVE PAGES

Revision No. 4
32--- 45--- 91 Page 2
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 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

TABLE OF CONTENTS

INTRODUCTION ..................................................................... Page 1

1. Introduction ............................................................. Page 1
A. General ................................................................ Page 1
B. Index of publications ................................................ Page 2

DESCRIPTION AND OPERATION ...................................................... Page 1

1. Description and operation ............................................. Page 1
A. Description ............................................................ Page 1
B. Operation (refer to Figure 4) ...................................... Page 7

TESTING AND FAULT ISOLATION ................................................... Page 1001

1. General ................................................................... Page 1001
A. Job set-up information .............................................. Page 1001
B. Job set-up ............................................................. Page 1001
2. Testing and fault isolation ........................................... Page 1002
A. General ................................................................ Page 1002
B. Testing of the carbon brake assembly .............................. Page 1004
C. Fault isolation ....................................................... Page 1007

SCHEMATIC AND WIRING DIAGRAM .................................................. Page 2001

DISASSEMBLY ....................................................................... Page 3001

1. General ................................................................... Page 3001
A. Job set-up information .............................................. Page 3001
2. Disassembly .............................................................. Page 3002
A. Disassembly of the carbon brake assembly ......................... Page 3002
B. Drain hydraulic fluid from the carbon brake assembly .......... Page 3002
C. Removal of the carbon brake assembly components ................ Page 3002
D. Disassembly of the piston housing assembly (1-450)
or the torque tube (1-490) .......................................... Page 3003
E. Disassembly of the heat sink (1-520) .............................. Page 3004
F. Disassembly of the piston housing assembly (1-450)
PRINTED IN FRANCE

or the return piston assemblies (1-270) .......................... Page 3005

G. Disassembly of the return piston assemblies (1-270) ............ Page 3005

CLEANING .......................................................................... Page 4001

1. General ................................................................... Page 4001
A. Job set-up information .............................................. Page 4001
2. Cleaning ................................................................. Page 4002
A. Procedure .............................................................. Page 4002
B. Cleaning of other parts ............................................. Page 4002
C. Removal of paint ...................................................... Page 4003

INSPECTION/CHECK ................................................................. Page 5001

1. General ................................................................... Page 5001
A. Job set-up information .............................................. Page 5001

TABLE OF CONTENTS

32--- 45--- 91 Page 1

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 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

2. Inspection/Check ........................................................ Page 5002

A. General inspection ................................................... Page 5002
B. Detailed inspection .................................................. Page 5002
C. Check of the piston housing assembly (1-450) .................... Page 5004
D. Torque tube (1-490) .................................................. Page 5004
E. Return piston assemblies (1-270) .................................. Page 5007
F. Bolts (1-090) and (1-100) ........................................... Page 5008
G. Nuts (1-070) .......................................................... Page 5009
H. Heat shield (1-480) .................................................. Page 5009
I. Heat sink (1-520) .................................................... Page 5009

REPAIR ............................................................................. Page 6001

CONTENTS ...................................................................... Page 6001
1. General ................................................................... Page 6002
A. Job set-up information .............................................. Page 6002
B. General instructions ................................................. Page 6003
2. Repair .................................................................... Page 6004
A. Protective treatments ................................................ Page 6004

ASSEMBLY .......................................................................... Page 7001

1. General ................................................................... Page 7001
A. Job set-up information .............................................. Page 7001
2. Assembly of the carbon brake assembly ............................... Page 7002
A. Installation of the heat sink (1-520) on
the torque tube (1-490) ............................................. Page 7002
B. Assembly of the return piston assembly (1-270) .................. Page 7005
C. Assembly of the piston housing assembly (1-450)
or the return piston assemblies (1-270) .......................... Page 7007
D. Assembly of the carbon brake assembly components ............... Page 7010
E. Final steps ............................................................ Page 7011

FITS AND CLEARANCES - TORQUES VALUES ......................................... Page 8001

1. Fits and clearances .................................................... Page 8001
A. Not applicable. ....................................................... Page 8001
2. Torque values ........................................................... Page 8002
PRINTED IN FRANCE

A. Torque value table ................................................... Page 8002

SPECIAL TOOLS, FIXTURES, EQUIPMENT AND CONSUMABLES ........................ Page 9001

1. Special tools and equipment ........................................... Page 9001
2. Consumables .............................................................. Page 9002

ILLUSTRATED PARTS LIST ......................................................... Page 10001

1. INTRODUCTION TO THE ILLUSTRATED PARTS LIST ......................... Page 10001
A. Policy .................................................................. Page 10001
B. How to use the Illustrated Parts List ............................ Page 10001
C. Revision ............................................................... Page 10002
D. Assembly breakdown ................................................... Page 10003
E. Words and abbreviations used ....................................... Page 10004

TABLE OF CONTENTS

32--- 45--- 91 Page 2

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 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

VENDOR’S CODE LIST .............................................................. Page 10005

NUMERICAL INDEX .................................................................. Page 10007

DETAILED PARTS LIST ............................................................. Page 10009

Figure 1 (sheet 1 of 3)/ GRAPHIC 32-45-91-991-1001-A01 ............... Page 10010
Figure 1 (sheet 2 of 3)/ GRAPHIC 32-45-91-991-1001-A01 ............... Page 10012
Figure 1 (sheet 3 of 3)/ GRAPHIC 32-45-91-991-1001-A01 ............... Page 10014

SPECIAL PROCEDURES .............................................................. Page 11001

REMOVAL ........................................................................... Page 12001

INSTALLATION ..................................................................... Page 13001

SERVICING ......................................................................... Page 14001

STORAGE (INCLUDING TRANSPORTATION) ........................................... Page 15001

1. General ................................................................... Page 15001
A. Job set-up information .............................................. Page 15001
2. Storage instruction .................................................... Page 15002

REWORK (SERVICE BULLETIN INSTRUCTIONS) ...................................... Page 16001

PRINTED IN FRANCE

TABLE OF CONTENTS

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 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

INTRODUCTION

TASK 32-45-91-990-801-A01

1. Introduction

Subtask 32-45-91-990-001-A01

A. General

(1) layout

(a) This manual which includes the “ILLUSTRATED PARTS LIST”, is made
to ATA Specification No. 100.

(b) This manual gives the function of the component and all the
instructions for its repair in a specialized workshop to put it
in a serviceable condition.

(c) The procedures included in this manual are given for your
guidance but you can use equivalents (or better procedures) if
the facilities of the repair shop permit.

(d) This manual does not include instructions on the standard

techniques, the widely used suppliers’ materials and calendar
limits of any type (frequencies, life, storage,...) applicable
to the component.

(e) The procedures for surface treatments, protections, inspections,

etc. are given in the STANDARD PRACTICES MANUAL (SPM) 32-09-01.

(f) The instructions contained in this manual can not include all
the details of the components because they are based on a normal
performance in operation of the unit and of its components which
can be damaged with the time.

(g) Use at all times, in the repair shop, safety precautions to

prevent injury to persons and damage to the component.
PRINTED IN FRANCE

(h) The manual has been verified by simulation and will be revised
as necessary to give current information.

(i) The values are given in units of the International System (S.I.
units) with the U.S. standard units in parentheses after the
S.I. units.
The conversions and abbreviations used are listed, for
reference, in the following table:

INTRODUCTION

32--- 45--- 91 Page 1

NOV 08/13
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

S.I. UNITS Abbreviations U.S. STANDARD UNITS Abbreviations

Degree Celsius ˚C Degree Fahrenheit ˚F

(or centigrade)
Millimeter mm Inch in
Newton-meter N.m Pound force per foot lbf.ft or lbf.in
or Pound force per inch
Newton N Pound force lbf
Kilogram kg Pound (mass) lb
Gram g Ounce oz
Mega Pascal MPa Kilopound per square ksi
inch
Bar bar Pound per square inch psi
Square centimeter cm2 Square inch in2
Cubic centimeter cm3 Cubic inch in3
Liter l Gallon US Gal

Subtask 32-45-91-990-002-A01

(2) Change in instructions

You must inform MESSIER-BUGATTI-DOWTY of any problem not shown in

this manual, to find a solution that you will use in the shortest
possible time.

If the solution found can come into general and repetitive use, a
subsequent revision to the manual will be made to introduce this
solution.

B. Index of publications
PRINTED IN FRANCE

Subtask 32-45-91-990-003-A01

(1) Index of publication CR47375

This MANUAL and its subsequent changes are given in the INDEX OF
MESSIER-BUGATTI-DOWTY COMPONENT MAINTENANCE MANUALS CR47375. You can
refer to this Index on MESSIER-BUGATTI-DOWTY website at
www.safranmbd.com.

INTRODUCTION

32--- 45--- 91 Page 2

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 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

DESCRIPTION AND OPERATION

TASK 32-45-91-870-801-A01

1. Description and operation

A. Description

Subtask 32-45-91-870-001-A01

(1) General

The carbon brake assembly without supply elbow assemblies can be

installed on the axle of a LH or RH landing gear.

NOTE: The installation side of the supply elbow assemblies gives the
side of the carbon brake assembly, left or right (refer to
Figure 2).

Hydraulic pressure supplied to the “SYSTEM 1” or “SYSTEM 2” supply

ports causes the six pistons to move. This movement compresses the
carbon disks, whose rotation in relation to the brake stators is
prevented, and the carbon disks, which rotate with the wheel rotors.
This generates the braking torque.

The braking torque is applied to a torque tube that is attached with

five bolts to the axle.

Subtask 32-45-91-870-002-A01

(2) Characteristics

Weight .................... Between 20,4 and 20,8 kg (44.97 and

45.86 lb).

Service fluid ............. AIR 3520B (MIL-PRF-5606H).

Operating pressure ........ 206 bar (2990 psi).

Brake travel .............. 0,8 to 2,8 mm (0.031 to 0.110 in).

PRINTED IN FRANCE

Number of pistons.......... Six.

- System 1 ............... Three.

- System 2 ............... Three.

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 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

BLEEDER VALVE ROTOR ASSEMBLIES

HEAT
SHIELD

TORQUE TUBE

WEAR PIN INDICATOR

BOLT

BOLT
FRONT STATOR ASSEMBLY

CENTER STATOR

REAR STATOR
PRINTED IN FRANCE

PISTON
HOUSING ASSEMBLY

TEMPERATURE
SENSOR

RETURN PISTON ASSEMBLY

Description of the Carbon Brake Assembly

Figure 1/ GRAPHIC 32-45-91-991-001-A01

32--- 45--- 91 Page 2

APR 30/02
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

Subtask 32-45-91-870-003-A01

(3) Description

The carbon brake assembly mainly has a piston housing, a heat sink
and a torque tube.

(a) Piston housing (refer to Figure 2)

The piston housing includes

- System 1 and system 2 which are the same, are not connected
to each other and operate simultaneously.

- A supply and bleed port connect each system to the outside

and three housings.

- Each housing contains a return piston assembly which is

installed in the piston housing.

1 Return piston assembly (refer to Figure 2)

Each return piston assembly includes:

- A piston sleeve.

- A piston.

- A scraper ring assembly.

- An insulator assembly.

- The parts of the automatic wear adjuster:

- A spring which is compressed between a spring guide and

the bottom of the piston. The spring holds the spring
guide against the retaining ring installed in the
piston.

- An adjuster tube which goes through the spring guide.

PRINTED IN FRANCE

- An adjuster pin with an attached ball which holds this

tube against the spring guide.

- A pin retainer which holds the adjuster pin at one end

of the piston sleeve.

32--- 45--- 91 Page 3

APR 30/02
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

BLEED PORTS
SYSTEM 1 SYSTEM 2

SYSTEM 1 SYSTEM 2

SYSTEM 2 SYSTEM 1

LH BRAKE SUPPLY RH BRAKE SUPPLY

HYDRAULIC CONNECTIONS

PISTON RETAINING
SLEEVE PISTON RING

BALL
PIN
RETAINER

INSULATOR
PRINTED IN FRANCE

ASSEMBLY

ADJUSTER
PIN

SPRING

ADJUSTER SPRING SCRAPER RING

TUBE GUIDE ASSEMBLY
Description
Figure 2/ GRAPHIC 32-45-91-991-002-A01

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 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

(b) Heat shield

The heat shield is installed between the heat sink and the
piston housing.

(c) Heat sink (refer to Figure 3)

The heat sink has the stators and the rotors, installed one
after the other.

- The rotor assemblies are driven by the wheel.

- The torque tube splines hold the stators in position.

- The set includes:

One front stator assembly, two rotor assemblies, one center

stator and one rear stator:

Each rotor assembly is a one-piece carbon disk with

stirrups. Drive blocks are riveted to each rotor assembly
(refer to Figure 3).

Front stator assembly is a one-piece carbon disk with two

inserts which attach the wear pin indicators.

Center and rear stator are each a one-piece carbon disk.

- The wear pin indicator:

The piston housing has two slots for the wear pin
indicators.

Each wear pin indicator is attached to the insert, installed

on the front stator assembly with a clip.

(d) Torque tube

- The torque tube features splines on its periphery which serve

as guides for the stators and for the heat shield.
PRINTED IN FRANCE

- A bolt attaches the torque tube to the piston housing.

- Five bolts attach the torque tube or the piston housing

assembly to the wheel hub.

- Five hub attaching bolts attach the storage piston housing.

When the carbon brake assembly is removed, the storage piston
housing locks the torque tube or the piston housing assembly.

32--- 45--- 91 Page 5

JAN 28/10
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

DRIVE BLOCK STIRRUP

RIVET

ROTOR ASSEMBLY
REAR STATOR
PRINTED IN FRANCE

ROTOR ASSEMBLY

CENTER STATOR

FRONT STATOR ASSEMBLY

Description of the Heat Sink

Figure 3/ GRAPHIC 32-45-91-991-003-A01

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 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

B. Operation (refer to Figure 4)

Subtask 32-45-91-870-004-A01

(1) Brake released

In theory, the rotors and the stators are free with a clearance
corresponding to dimension ”A”. In the practice, a clearance between
0,8 and 2,8 mm (0.031 and 0.110 in) is permitted.

Subtask 32-45-91-870-005-A01

(2) Brake application (detail 1)

(a) Pressure admitted through the two supply ports of the piston
housing causes the corresponding pistons to be simultaneously
pressurized.

(b) The pressure pushes the pistons which compress the set of the
stators and the rotors of the heat sink.

This creates a resistive torque between the stators and the

rotors. The wheel brake is applied.

Subtask 32-45-91-870-006-A01

(3) Brake release (detail 2)

As soon as the pressure decreases, the spring moves back the return
piston assembly. This decreases the brake torque to zero in the heat
sink. The operating clearance ”A” is restored.

Subtask 32-45-91-870-007-A01

(4) Brake application (with a worn heat sink) (automatic wear adjuster)
(detail 3)

NOTE: This device keeps the brake travel constant which is thus not
affected by the heat sink wear.
PRINTED IN FRANCE

(a) As soon as the systems are pressurized, the movement of the

pistons causes the spring to be compressed.

- The automatic wear adjuster comes to a stop against the

piston sleeve and this limits the normal travel ”A”.

(b) The heat sink wear causes an additional travel ”B” of the
pistons. This additional travel makes the ball enter the tube to
a depth equal to the additional travel ”B”.

(c) As soon as the pressure drops when the brake is released, the
spring of the return piston assembly moves back the pistons.
This decreases the brake torque in the heat sink to zero. The
operating clearance ”A” is restored (detail 4).

32--- 45--- 91 Page 7

JAN 28/10
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

Subtask 32-45-91-870-008-A01

(5) Wear pin indicator (refer to Figure 5)

When the heat sink wear is maximum, the end of the wear pin indicator
is aligned with the piston housing recess.
PRINTED IN FRANCE

32--- 45--- 91 Page 8

APR 30/02
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

NEW HEAT SINK

BRAKE APPLICATION BRAKE RELEASE
FRONT STATOR ASSEMBLY
ROTOR ASSEMBLY

SPRING PISTON
GUIDE A INTERNAL A
CLEARENCE
DETAIL 1 DETAIL 2

WORN HEAT SINK

BRAKE APPLICATION BRAKE RELEASE

ADJUSTER TUBE
PRINTED IN FRANCE

A+B A B A

DETAIL 3 DETAIL 4
Operation of the Return Piston Assembly
Figure 4/ GRAPHIC 32-45-91-991-004-A01

32--- 45--- 91 Page 9

APR 30/02
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

WEAR PIN INDICATOR

NEW HEAT SINK WORN HEAT SINK

(WEAR PIN INDICATOR FLUSH
WITH THE PISTON HOUSING)
PRINTED IN FRANCE

Wear Pin Indicator

Figure 5/ GRAPHIC 32-45-91-991-005-A01

32--- 45--- 91 Page 10

APR 30/02
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

TESTING AND FAULT ISOLATION

TASK 32-45-91-700-801-A01
1. General
A. Job set-up information
Subtask 32-45-91-700-001-A01
(1) Tools, fixtures and equipment
NOTE: You can use equivalent replacements for the special tools and
fixtures.

REFERENCE QTY NAME

F21864100 1 Hydraulic test bench

GA47958-500 1 Drain pipe

Subtask 32-45-91-700-002-A01
(2) Consumables

REFERENCE NAME

AIR 3520B Hydraulic fluid

Subtask 32-45-91-700-003-A01
(3) Referenced information
(a) Not applicable.
PRINTED IN FRANCE

B. Job set-up
Subtask 32-45-91-800-001-A01
(1) Test conditions
(a) Do all the tests under standard test conditions:
- Ambient temperature: between 15 and 35 ˚C (59 and 95 ˚F) and
at atmospheric pressure.

- Fluid temperature: between 15 and 45 ˚C (59 and 113 ˚F).

- Contamination class: less than or equal to 7 as per standard

NAS 1638.

32--- 45--- 91 Page 1001

NOV 08/13
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

TASK 32-45-91-700-802-A01

2. Testing and fault isolation

A. General

Subtask 32-45-91-700-004-A01

(1) Purpose

NOTE: The figure of the “ILLUSTRATED PARTS LIST” shows the detail
parts of the component.

CAUTION: (For information only):

A LABEL MUST SHOW THE REMAINING WEAR DIMENSION ON THE
INDICATOR WHEN CARBON BRAKE ASSEMBLY ARE SENT TO THE REPAIR
SHOP (FOR ANY REASON). MAKE THE MEASUREMENT ON THE AIRCRAFT
WITH THE PARKING PRESSURE APPLIED TO THE CARBON BRAKE
ASSEMBLY BEFORE THE BRAKE IS REMOVED. IF THIS DIMENSION IS
NOT SHOWN, MEASURE THE DIMENSION BEFORE ANY WORK IS DONE ON
THE CARBON BRAKE ASSEMBLY. TO MAKE THIS MEASUREMENT, BRING
THE DISKS TO THE CENTER AND SUPPLY 120 BAR (1740 PSI) TO ONE
OF THE TWO HYDRAULIC SYSTEMS (REFER TO FIGURE 1001).

A carbon brake assembly may be sent to the repair shop for two
reasons:

- Ageing.

- Damage or failures (early removal).

Subtask 32-45-91-700-005-A01

(2) Ageing

One cycle = complete wear of the heat sink (1-520).

NOTE: To keep the carbon brake assembly in good operating condition,

the repairer should do the following procedures:
PRINTED IN FRANCE

- At each cycle: Replace the piston (1-400) and the liner seals. Do a
visual inspection of the carbon brake assembly.

- Every four cycles: Do a major overhaul of the carbon brake

assembly. Refer to the ”CHECK” section.

32--- 45--- 91 Page 1002

JAN 28/10
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

WEAR PIN INDICATOR (1-510)

X: WEAR DIMENSION
PRINTED IN FRANCE

Measurement of the Wear Dimension

Figure 1001/ GRAPHIC 32-45-91-991-101-A01

32--- 45--- 91 Page 1003

APR 30/02
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

Subtask 32-45-91-700-006-A01

(3) Damage or failures (early removal)

CAUTION: PUT THE CARBON BRAKE ASSEMBLY BACK INTO SERVICE IF THE
REMAINING WEAR DIMENSION AND THE PROCEDURES TO BE DONE MAKE
IT POSSIBLE.

It may be necessary to remove the carbon brake assembly before the

time limit for two reasons:

- Hydraulic or mechanical problems.

- Overheating.

NOTE: The inspections to be done when a carbon brake assembly is

removed because of overheating are given in the ”CHECK”
section.

B. Testing of the carbon brake assembly

Subtask 32-45-91-700-007-A01

(1) Preparation

CAUTION: BEFORE ANY PRESSURE IS APPLIED, PUT THE ROTORS IN THE CENTER
AND MAKE SURE THAT THE RIVETS ATTACHING THE DRIVE BLOCKS
NEVER COME INTO CONTACT WITH THE FRICTION SURFACES OF THE
STATORS DURING THE TESTS. MAKE SURE THAT THE STORAGE FLANGE
IS PRESENT AND THE NUTS (1-070) ARE TORQUED TO A LOAD OF
82 N.m (60.5 lbf.ft).

NOTE: Move the carbon brake assembly until it touches the piston
housing (1-470).

(a) Connect the hydraulic supply to the two orifices of the carbon
brake assembly.

(b) Remove the bleeder screws (1-160) and connect the drain pipe
GA47958-500 to a bleeder valve (1-180).
PRINTED IN FRANCE

Subtask 32-45-91-700-008-A01

(2) Flushing

CAUTION: PUT THE PROTECTOR (1-110) TO PREVENT HYDRAULIC FLUID FROM

GETTING ON THE HEAT SINK (1-520).

(a) Supply fluid at 0 to 100 bar (0 to 1450 psi) to each

hydraulic system. Increase the pressure from 0 to 100 bar
(0 to 1450 psi) several times in each system.

(b) Take a fluid sample from each system and make sure that the
contamination class is less than or equal to 7
(refer to NAS 1638).
(c) Flush again if necessary.

32--- 45--- 91 Page 1004

JAN 19/07
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

Subtask 32-45-91-700-009-A01
(3) Bleeding before testing
(a) Open the bleeder valves (1-180).
(b) Supply pressure gradually and let fluid and air flow out of the
valves. Supply fluid until there are no more air bubbles.
(c) Close the bleeder valves (1-180) and torque them to a load of
5 N.m (44 lbf.in) and decrease the pressure to zero.
(d) Remove the drain pipe GA47958-500 and install the bleeder screws
(1-160) with the bleeder washers (1-170).
(e) Torque the bleeder screws (1-160) to a load of 1,75 N.m
(15.49 lbf.in).
Subtask 32-45-91-700-010-A01
(4) Leakage test
CAUTION: BEFORE YOU APPLY PRESSURE, MAKE SURE THAT THE STORAGE FLANGE
IS INSTALLED.
CAUTION: WHEN YOU INSTALL THE PISTON HOUSING ASSEMBLY (1-450) ON THE
HYDRAULIC TEST BENCH, MAKE SURE THAT THE MAXIMUM OUTPUT
STROKE OF THE PISTONS (1-400) IS LIMITED TO 1,8 MM
(0.071 IN) TO AVOID DEFORMATION OF THE TORQUE TUBE (1-490).
NOTE: Do this test only on the piston housing assembly (1-450)
installed with its pistons (1-400).
(a) Leakage test of system 1
- Gradually pressurize the system to 300 bar (4350 psi).
- Let the pressure stabilize, and adjust the pressure to
300 bar (4350 psi).
- The pressure must not fall and there must be no external
leakage for 5 minutes.
(b) Leakage test of system 2
PRINTED IN FRANCE

- The same procedure applies (refer to paragraph (a) above).

Subtask 32-45-91-700-011-A01
(5) Automatic wear adjuster operating check (refer to Figure 1001)
CAUTION: PRIOR TO APPLYING PRESSURE, MAKE SURE THAT THE STORAGE
FLANGE FOR PRESENCE, CENTER THE ROTORS AND MAKE SURE THAT
DURING THE TESTS THE RIVETS ATTACHING THE DRIVE BLOCKS NEVER
COME IN CONTACT WITH THE FRICTION FACES OF THE STATORS.
(a) Pressurize the carbon brake assembly through the two systems to
a pressure of between 100 and 110 bar (1450 and 1595 psi) then
decrease the pressure to 3 to 4 bar (43.5 to 58.0 psi).
Make sure that the functional clearance between the front stator
assembly (1-530) and the return piston assembly (1-270) is
between 0,8 and 2,8 mm (0.031 and 0.110 in).

32--- 45--- 91 Page 1005

NOV 08/13
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

(b) Gradually pressurize the carbon brake assembly only through the
system 1 to a pressure of between 110 and 120 bar (1595 and
1740 psi).

During brake application, make sure that:

- The displacement of the piston (1-400) is roughly even.

- The pressure at the beginning of disk application (zero

torque) is less than or equal to 14,3 bar (205 psi).

(c) Gradually depressurize the system 1 and when you release brake
make sure that:

- The pressure at the beginning of disk release (zero torque)

is more than or equal to 7,7 bar (110 psi).

- The residual pressure when the pistons (1-400) return to zero

is still more than or equal to 6,7 bar (97.2 psi).

(d) Do again the steps (b) and (c) two times with the carbon brake
assembly supplied only through the system 1 and then three times
with the carbon brake assembly supplied only through the
system 2.

Subtask 32-45-91-700-012-A01

(6) Long term LP tests

Pressurize the two systems simultaneously to 0,3 bar (4.4 psi).

Allow the pressure to stabilize, readjust the pressure to its initial
value and maintain this pressure for 12 hours.

No external leakage should be observed, in particular around the

piston (1-400) and the piston sleeve (1-440).
PRINTED IN FRANCE

32--- 45--- 91 Page 1006

NOV 08/13
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

C. Fault isolation

Subtask 32-45-91-700-013-A01

(1) Hydraulic leakage

- Do the following procedures:

FAULT PROBABLE CAUSES CORRECTION

Hydraulic leakage The preformed packing - Replace the preformed

between the piston (1-410) is defective. packing (1-410).
housing assembly Refer to the “ASSEMBLY”
(1-450) and the return section.
piston assembly
(1-270).
- Do the leakage tests.

Hydraulic leakage The seal assembly (1-390) - Replace the seal assembly
between the piston is defective. (1-390).
sleeve (1-440) and the Refer to the “ASSEMBLY”
piston (1-400). section.
- Do the leakage tests.

Hydraulic leakage The seal assembly (1-380) - Replace the seal assembly
between the piston is defective. (1-380).
(1-400) and the Refer to the “ASSEMBLY”
adjuster pin (1-330). section.
- Do the leakage tests.
PRINTED IN FRANCE

Hydraulic leakage The plug assemblies - Torque the plug assemblies

between the piston (1-220) are not (1-220) to a load of
housing assembly sufficiently tightened. 11,5 N.m (8.48 lbf.ft).
(1-450) and the plug
assembly (1-220).
The preformed packings - Replace the preformed
(1-240) are defective. packing (1-240).
Refer to the “ASSEMBLY”
section.
- Do the leakage tests.

32--- 45--- 91 Page 1007

JAN 28/10
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

FAULT PROBABLE CAUSES CORRECTION

Hydraulic leakage The bleeder valve (1-180) - Torque the bleeder valves
between the piston is not sufficiently (1-180) to a load of 5 N.m
housing assembly tightened. (44 lbf.in) MAX.
(1-450) and the bleeder
valve (1-180).
The preformed packings - Replace the preformed
(1-200) are defective. packing (1-200).
Refer to the “ASSEMBLY”
section.
- Do the leakage tests.

The remaining pressure The spring (1-370) is - Measure the compression

when the pistons weak. spring loads. Refer to the
(1-400) are back to “CHECK” section.
their initial position
is less than 6,7 bar
(97.2 psi).

The clearance of the The spring (1-370) is - Measure the spring load.
brake is less than the weak. Refer to the “CHECK”
minimum value. section.

Overheated brake or the High back pressure. - Test the hydraulic system
brake is not fully and correct the cause of
released. high back pressure.

The spring (1-370) is - Measure spring load. Refer

PRINTED IN FRANCE

weak. to the “CHECK” section.

- Replace the spring (1-370).

Soft or split adjuster - Replace the defective parts.

tubes (1-320).

The adjuster pins (1-330) - Replace the defective parts.

broken or the
self-locking nut (1-300)
disengaged.

32--- 45--- 91 Page 1008

JAN 19/07
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

SCHEMATIC AND WIRING DIAGRAM

TASK 32-45-91-995-801-A01

Not applicable.
PRINTED IN FRANCE

32--- 45--- 91 Page 2001

APR 30/02
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

DISASSEMBLY

TASK 32-45-91-000-801-A01

1. General

A. Job set-up information

Subtask 32-45-91-000-001-A01

(1) Tools, fixtures and equipment

NOTE: You can use equivalent replacements for the special tools and
fixtures.

REFERENCE QTY NAME

GA47958-500 1 Drain pipe

R47226 1 Compression tool
R47227 1 Spanner
R47230 1 Tool to extract the insulator
assembly (1-280)
89901 1 Spatula

Subtask 32-45-91-000-002-A01

(2) Consumables

(a) Not applicable.

Subtask 32-45-91-000-003-A01

(3) Referenced information

PRINTED IN FRANCE

(a) Not applicable.

32--- 45--- 91 Page 3001

NOV 08/13
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

TASK 32-45-91-000-802-A01

2. Disassembly

A. Disassembly of the carbon brake assembly

NOTE: The figure of the “ILLUSTRATED PARTS LIST” shows the detail parts
of the component.

Subtask 32-45-91-000-004-A01

(1) General

The carbon brake assembly requires full or partial disassembly

depending on the faults found during testing.

NOTE: Refer to the ”TESTING AND FAULT ISOLATION” section in order to

know the condition of unit and the most probable cause of its
faulty operation. The purpose is to know what is to be
disassembled and avoid complete disassembly and reassembly of
the equipment.

B. Drain hydraulic fluid from the carbon brake assembly

CAUTION: HYDRAULIC FLUID IS FLAMMABLE AND DANGEROUS TO EYES, SKIN AND

RESPIRATORY TRACT. YOU MUST USE SKIN AND EYE PROTECTION EQUIPMENT.
DO NOT TOUCH THE FLUID AGAIN AND AGAIN OR FOR A LONG TIME. GOOD
GENERAL AIR FLOW IS USUALLY SUFFICIENT.

Subtask 32-45-91-000-005-A01

(1) Drain hydraulic fluid from the brake structure (1-010)

(a) Cut and discard the lockwire (1-150).

(b) Remove the bleeder screw (1-160) and the bleeder washer (1-170).

(c) Connect the drain pipe GA47958-500 to a bleeder valve (1-180).

PRINTED IN FRANCE

(d) Drain hydraulic fluid from the piston housing assembly (1-450).

C. Removal of the carbon brake assembly components

Subtask 32-45-91-000-006-A01

(1) Removal of the temperature sensor (1-025)

(a) Cut and discard the lockwire (1-020).

(b) Remove the screw (1-030), the washer (1-040) and the temperature
sensor (1-025).

32--- 45--- 91 Page 3002

APR 30/02
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

Subtask 32-45-91-000-007-A01

(2) Removal of the plug assembly (1-220) and the bleeder valves (1-180)

(a) Remove the bleeder valve (1-180).

(b) Remove the seat (1-190), remove and discard the preformed
packing (1-200) from the seat (1-190) with the spatula 89901.

(c) Cut and discard the lockwire (1-210).

(d) Remove the plug assembly (1-220), remove and discard the
preformed packing (1-240) from the protective plug (1-230) with
the spatula 89901.

(e) Install the protective plugs (1-130) with the non metallic
washers (1-140).

Subtask 32-45-91-000-008-A01
(3) Removal of the warning plate (1-250)

NOTE: Before you remove the warning plate (1-250), record their
locations and the information that they show.

(a) Remove the warning plate (1-250).

D. Disassembly of the piston housing assembly (1-450) or the torque tube
(1-490)

Subtask 32-45-91-000-009-A01
(1) Uncoupling the piston housing assembly (1-450) or the torque tube
(1-490) (refer to Figure 3001)
CAUTION: IF A HEAT SINK (1-520) IS NOT FULLY WORN, THE HEAT SINK
(1-520) MAY BE INSTALLED AS IS UNTIL IT IS FULLY WORN. IN
THIS CASE, MAKE SURE THAT THE POSITIONS AND FRICTION FACES
ARE IDENTIFIED WITH ADHESIVE TAPE ON THE STATORS AND THE
ROTORS, S1, R1, S2, R2, AND SO ON (REFER TO THE FIGURE
BELOW).
PRINTED IN FRANCE

S1 R1 S2 R2 S3

Marking of the Heat Sink (1-520)

Figure 3001/ GRAPHIC 32-45-91-991-301-A01

32--- 45--- 91 Page 3003

NOV 08/13
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

(a) Remove the bolts (1-090), the nuts (1-070), the washers (1-080)
and the flange (1-120).

(b) Cut and discard the lockwire (1-060A) or (1-060B).

(c) After accomplishment of SB C20544-32-050, remove and discard the

cotter pin (1-060C).

(d) Remove the bolt (1-100), the nut (1-070) and the washers
(1-080).

(e) Remove the piston housing assembly partially disassembled.

(f) Remove the heat shield (1-480).

(g) Remove the clips (1-500) then remove the wear pin indicators
(1-510).

CAUTION: DO NOT REMOVE THE WEAR PIN INDICATORS (1-510) UNLESS

THEY ARE FLUSH WITH THE WEAR PIN INDICATOR (1-510)
INDEXES. INSTALL THE NEW WEAR PIN INDICATORS (1-510)
ONLY IF YOU INSTALL A NEW HEAT SINK (1-520).

(h) Remove the heat sink (1-520).

CAUTION: THERE IS A RISK OF DAMAGE TO THE CARBON DISKS. DO NOT

LET THEM FALL OR HIT HARD OBJECTS. IF THEY ARE DAMAGED,
EXAMINE THE CARBON DISKS AS WRITTEN IN THE ”CHECK”
SECTION.

CAUTION: WHEN YOU DISASSEMBLE THE HEAT SINK (1-520), BE CAREFUL

TO PREVENT THE STATORS AND THE ROTORS FROM TOUCHING:

- PAINT REMOVERS.
- GREASY MATERIALS.
- PAINTS (THERMOCOLOR, MINIMUM AND MARKING TYPES).
- SERVICE FLUID.
- CHALK.
PRINTED IN FRANCE

(i) Remove the torque tube (1-490).

E. Disassembly of the heat sink (1-520)

Subtask 32-45-91-000-010-A01

(1) Removal of the stators and the rotors

(a) Remove the front stator assembly (1-530) together with its two
wear pin indicators (1-510).

(b) Remove the rotor assemblies (1-540) and the center stator
(1-550) one after the other.

(c) Remove the rear stator (1-560).

32--- 45--- 91 Page 3004

NOV 08/13
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

F. Disassembly of the piston housing assembly (1-450) or the removal of the

return piston assemblies (1-270)

Subtask 32-45-91-000-011-A01

(1) Removal of the return piston assemblies (1-270)

(a) Cut and discard the lockwire (1-260).

(b) Clean the part of the return piston assemblies (1-270) to which
you can get access. Push back the return piston assemblies
(1-270), then remove the return piston assemblies (1-270) from
the piston housing assembly (1-450), with the spanner R47227.

G. Disassembly of the return piston assemblies (1-270)

Subtask 32-45-91-000-012-A01

(1) Removal of the insulator assemblies (1-280)

(a) Put the removal tool R47230 between the insulator assembly
(1-280) and the piston sleeve (1-440).

(b) Use the removal tool R47230 as lever to lift the insulator
assembly (1-280). At the same time, turn and pull the insulator
assembly (1-280) to remove it.

Subtask 32-45-91-000-013-A01

(2) Disassembly of the return piston assemblies (1-270)

(a) Remove and discard the self-locking nut (1-300).

(b) Remove the adjuster tube (1-320), then remove the ball (1-310)
from the adjuster tube (1-320).

(c) Discard the adjuster tube (1-320) and the ball (1-310).

(d) Remove the adjuster pin (1-330) and the pin retainer (1-340).
PRINTED IN FRANCE

(e) Remove the piston or the automatic wear adjuster from the piston
sleeve (1-440).

(f) Remove the preformed packing (1-410) and the back-up ring
(1-420) from the piston sleeve (1-440) with the spatula 89901.
Discard them.

(g) Remove the scraper ring assembly (1-430) from the piston sleeve
(1-440).

(h) Remove the seal assemblies (1-380) and (1-390) from the piston
(1-400).

32--- 45--- 91 Page 3005

NOV 24/03
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

WARNING: USE EYE PROTECTION EQUIPMENT. THE RETURN PISTON ASSEMBLY

(1-270) CONTAINS A SPRING (1-370) COMPRESSED TO 1731 N
(389.1 lbf).

- IF YOU DISASSEMBLE THE RETURN PISTON ASSEMBLY (1-270)

WITHOUT CORRECT EQUIPMENT.

- OR IF YOU DO NOT OBEY THE INSTRUCTIONS THAT FOLLOW. THE

RESULT MAY BE SERIOUS INJURY.

(i) Use the compression tool R47226 to disassemble the spring guide
(1-360) and the spring (1-370).

(j) Remove the retaining ring (1-350) and slowly decrease the force
applied to the spring (1-370). Remove the spring guide (1-360)
and the spring (1-370).
PRINTED IN FRANCE

32--- 45--- 91 Page 3006

NOV 08/13
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

CLEANING

TASK 32-45-91-100-801-A01

1. General

A. Job set-up information

Subtask 32-45-91-100-001-A01

(1) Tools, fixtures and equipment

(a) Not applicable.

Subtask 32-45-91-100-002-A01

(2) Consumables

NOTE: You can use equivalent materials as an alternative to those

shown below for the special tools and fixtures.
For complimentary information about aqueous cleaning products,
refer to the SL F6137-32-851.

REFERENCE NAME

WHITE SPIRIT or product as per Cleaning product

MIL-PRF-680 or aqueous cleaning
products

Subtask 32-45-91-100-003-A01

(3) Referenced information

REFERENCE DESIGNATION
PRINTED IN FRANCE

Standard Practices Manual (SPM) Paint stripping by local

32-09-01, section 28 application of PAINTEX - SCALPEX
- ARDROX 2526

Standard Practices Manual (SPM) Paint stripping by the bath

32-09-01, section 29 method

Standard Practices Manual (SPM) Paint removal by plastic media

32-09-01, section 70 blasting

SL F6137-32-851 Wheels and brakes aqueous

cleaning products

32--- 45--- 91 Page 4001

JAN 28/10
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

TASK 32-45-91-100-802-A01

2. Cleaning

A. Procedure

NOTE: The figure of the “ILLUSTRATED PARTS LIST” shows the detail parts of
the component.

Subtask 32-45-91-100-004-A01

(1) Heat sink (1-520)

CAUTION: WHEN YOU DISASSEMBLE THE HEAT SINK (1-520) YOU MUST PREVENT
THE FOLLOWING MATERIALS FROM TOUCHING THE ROTORS AND THE
STATORS:

- PAINT REMOVERS.
- GREASY MATERIALS.
- PAINTS (THERMOCOLOR, MINIMUM AND MARKING PAINT TYPES).
- CHALK.
- SERVICE FLUID.

CAUTION: DO NOT BAKE THE HEAT SINK (1-520).

- Use a nylon bristle brush to clean the rotors and the stators with
a vacuum cleaning machine.

- Remove any light signs of grease from the disks with cleaning
product WHITE SPIRIT or aqueous cleaning products or product in
accordance with specification MIL-PRF-680.

B. Cleaning of other parts

Subtask 32-45-91-100-005-A01

(1) General

WARNING: BEFORE USE OF WHITE SPIRIT OR AQUEOUS CLEANING PRODUCTS OR

EQUIVALENTS, CAREFULLY READ THE APPLICABLE “MATERIAL SAFETY DATA
PRINTED IN FRANCE

SHEET” AND OBEY ALL THE GIVEN SAFETY HEALTH PRECAUTIONS. USE WHITE
SPIRIT OR AQUEOUS CLEANING PRODUCTS OR EQUIVALENT IN AN AREA
OPENED TO THE AIR AND USE PROTECTION GLOVES. THIS MATERIAL IS
FLAMMABLE AND GAS IS DANGEROUS. IT CAN CAUSE IRRITATION OF EYES,
NOSE, THROAT AND SKIN. HIGH CONCENTRATIONS CAN CAUSE WEAKNESS,
HEADACHE, NAUSEA, DIZZINESS AND INCORRECT JUDGEMENT.

CAUTION: USE ONLY SPECIFIED CLEANING MATERIALS AND SOLUTIONS, OR

THEIR EQUIVALENTS. THE USE OF UNSPECIFIED MATERIALS CAN
CAUSE DAMAGE TO THE SURFACE PROTECTION.

NOTE: Before cleaning the return piston assemblies (1-270) or the

piston housing assembly (1-450), remove and discard all their
seal assemblies, the back-up rings and the preformed packings.
(a) Remove the insulator assembly (1-280) as described in the
“DISASSEMBLY” section.

32--- 45--- 91 Page 4002

JAN 28/10
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

(b) Clean these parts and the torque tube (1-490) with cleaning
product WHITE SPIRIT or aqueous cleaning products or product in
accordance with specification MIL-PRF-680, then dry them with
dry compressed air.

C. Removal of paint

Subtask 32-45-91-100-006-A01

WARNING: PAINT REMOVERS ARE FLAMMABLE AND DANGEROUS TO EYES, SKIN AND
RESPIRATORY TRACT. YOU MUST USE SKIN AND EYE PROTECTION EQUIPMENT.
PREVENT REPEATED CONTACT OR A CONTACT FOR A LONG TIME WITH PAINT
REMOVAL CHEMICALS. GOOD GENERAL AIR FLOW IS USUALLY SUFFICIENT.

CAUTION: IF YOU USE SAND IN THE ABRASIVE BLAST PROCEDURE OR IF YOU USE A
WIRE BRUSH TO CLEAN THE PARTS; IT CAUSE DAMAGE TO THE ANODIZED
LAYER ON ALUMINIUM PARTS.

CAUTION: PAINT REMOVER MUST NOT TOUCH RUBBER OR PLASTIC MATERIAL.

NOTE: It is necessary to remove paint before penetrant examination or shot

peening of the piston housing (1-470). It is necessary to remove
paint for eddy current inspection.

(1) Preparation

CAUTION: DO NOT LET PAINT REMOVER TOUCH RUBBER OR PLASTIC MATERIAL.

Before you remove paint, seal those parts which contain inserts,
shrink-fitted bushes or machining plugs (piston housing assembly
(1-450)) to prevent the paint remover from flowing into the joint
between adjacent surfaces.

Subtask 32-45-91-100-007-A01

(2) Procedure

Remove paint from the part as per the procedures given in section 28,
29 or 70 of the SPM 32-09-01.
PRINTED IN FRANCE

32--- 45--- 91 Page 4003

JAN 28/10
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

INSPECTION/CHECK

TASK 32-45-91-200-801-A01

1. General

A. Job set-up information

Subtask 32-45-91-200-001-A01

(1) Tools, fixtures and equipment

NOTE: You can use equivalent replacements for the special tools and
fixtures.

REFERENCE QTY NAME

S47232 1 Tool to measure the clearance

between the rotor clamps

Subtask 32-45-91-200-002-A01

(2) Consumables

(a) Not applicable.

Subtask 32-45-91-200-003-A01

(3) Referenced information

REFERENCE DESIGNATION

Standard Practices Manual (SPM) Local repair of the surface

PRINTED IN FRANCE

32-09-01, section 14 finish on aluminum alloys by

chemical oxidizing with ALODINE
1200

Standard Practices Manual (SPM) Detection of defects by

32-09-01, section 38 Fluorescent Penetrant Inspection
(FPI)

Standard Practices Manual (SPM) Detection of defects by Magnetic

32-09-01, section 42 Particle Inspection (MPI)

Standard Practices Manual (SPM) Measures of hardness by

32-09-01, section 76 penetration

32--- 45--- 91 Page 5001

JAN 28/10
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

TASK 32-45-91-200-802-A01

2. Inspection/Check

A. General inspection

Subtask 32-45-91-200-004-A01

(1) General

NOTE: The figure of the “ILLUSTRATED PARTS LIST” shows the detail
parts of the component.

NOTE: If you find local corrosion, impact damage or scratches, which

does not make it necessary to reject the part, repair the part
as written in the ”REPAIR” section.

(a) Examine each part for signs of corrosion. Estimate their

importance, depth and location (fatigue area).

(b) Make sure that each part is without impact damage or scratches.

B. Detailed inspection

Subtask 32-45-91-200-005-A01

(1) Purpose

- The detailed inspections to be done on the carbon brake assembly

components depend on the reasons for which the carbon brake
assembly was removed.

- There are two reasons:

- Ageing (at the end of the service life of the heat sink
(1-520)).

- Failures (before the end of the service life).

PRINTED IN FRANCE

(a) Ageing

- Every two cycles (one cycle is the full wear of the heat sink
(1-520)). Disassemble the return piston assembly (1-270) and
replace the seal assemblies (1-380) and (1-390), the
preformed packing (1-410) and the back-up ring (1-420).

- Every four cycles, do the general inspection of the carbon

brake assembly components.

(b) Failures

- If the carbon brake assembly has been too hot because of

incorrect piston retraction or aborted take-off run, do the
checks and inspections written below.

32--- 45--- 91 Page 5002

NOV 24/03
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

* = signs of excessive temperature (caused by aborted take–off or dragging brake)

or if you are not sure that it has been too hot.

PART INSPECTION PROCEDURE CYCLES *

1 2 3 4
Piston housing assembly Visual inspection X X X X X
(1-450)
Metallurgical inspection X X
Hardness test X X

Torque tube (1-490) Visual inspection X X X X X

Metallurgical inspection X X
Hardness test X X

Insulator assemblies
(1-280)
- Adjuster pin (1-330) Visual inspection X X X
Metallurgical inspection X X
- Spring guide (1-360) Visual inspection X X X
Dimensionnal check X X
- Spring (1-370) Compression test X X X
- Piston (1-400) Visual inspection X X X
Metallurgical inspection X X
- Piston sleeve (1-440) Visual inspection X X X
Metallurgical inspection X X

Bolt (1-090) and (1-100) Visual inspection X X X X X

Metallurgical inspection X X X X X
PRINTED IN FRANCE

Nut (1-070) Test of self-locking torque X X X X X

Heat shield (1-480) Visual inspection X X X X X

Heat sink (1-520) Visual inspection X

(not fully worn)

Table of recommended inspection procedures

32--- 45--- 91 Page 5003

NOV 24/03
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

C. Check of the piston housing assembly (1-450)

Subtask 32-45-91-200-006-A01

(1) Visual inspection

Make sure that there are no scratches in the bores in which the
piston sleeve (1-440) is installed.

Examine all male and female threads for condition (no damage).

Make sure that the blanking plugs are tight (non-removable).

Subtask 32-45-91-200-007-A01

(2) Metallurgical inspection

Every two cycles or after the carbon brake assembly has been too hot,
do a Fluorescent Penetrant Inspection (FPI) on the piston housing
(1-470) as written in section 38 of the SPM 32-09-01.

Subtask 32-45-91-200-008-A01

(3) Hardness test

Do the hardness test (refer to Figure 5001, detail A). Obey the
following requirements and use:

- A 10 mm (0.39 in) dia. ball at 10000 N (2248 lbf) load. Refer to

section 76 of the SPM 32-09-01.

(a) Ball test

Minimum hardness = 140 HB.

Strength not below 460 MPa (66.7 ksi).

NOTE: After the test, correct the tested area, with

chemical oxidizer as written in section 14 of the SPM
32-09-01.
PRINTED IN FRANCE

D. Torque tube (1-490)

Subtask 32-45-91-200-009-A01

(1) Visual inspection

Make sure that the splines are without scratches or metal damage.

Subtask 32-45-91-200-010-A01

(2) Metallurgical inspection

Every two cycles or after the carbon brake assembly has been too hot,
do a Magnetic Particle Inspection (MPI) on the torque tube (1-490) as
written in section 42 of the SPM 32-09-01.

32--- 45--- 91 Page 5004

JAN 28/10
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

Subtask 32-45-91-200-011-A01

(3) Hardness test

Do the hardness test (refer to Figure 5001). Obey the following

requirements:

- A 1 mm (0.04 in) dia. ball at 300 N (67.4 lbf) load.

(a) Ball test

Minimum hardness: 306 HB.

Strength not below 1080 MPa (156.6 ksi).

NOTE: After the test, correct the tested area.

PRINTED IN FRANCE

32--- 45--- 91 Page 5005

JAN 19/07
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

PISTON HOUSING ASSEMBLY

(1-450)

INSTALLATION AREA AREA TO BE

FOR THE TORQUE TUBE (1-490) HARDNESS TESTED

AREA TO BE
PRINTED IN FRANCE

HARDNESS TESTED

TORQUE TUBE
(1-490)

BRINELL Hardness Test Areas

Figure 5001/ GRAPHIC 32-45-91-991-501-A01

32--- 45--- 91 Page 5006

APR 30/02
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

E. Return piston assemblies (1-270)

Subtask 32-45-91-200-012-A01

(1) Adjuster pin (1-330)

(a) Visual inspection

Examine the threads for condition.

Make sure that the ball seat diameter is without peened areas.

Make sure that the chromium–plated diameter is without scratches

or flakes.

(b) Metallurgical inspection

Do a Magnetic Particle Inspection (MPI) on the adjuster pin

(1-330) as written in section 42 of the SPM 32-09-01.

Subtask 32-45-91-200-013-A01

(2) Spring guide (1-360)

(a) Visual inspection

Make sure that the spring guide (1-360) is without scratches or

scores.

Subtask 32-45-91-200-014-A01

(3) Spring (1-370)

(a) Compression test

For the height H1 of 27,500 mm (1.08267 in) the load P1 must be

approximately 1100 N (247.29 lbf).

For the height H2 of 24,800 mm (0.97638 in) the load P2 must be

between 1565 and 1731 N (351.8 and 389.1 lbf).
PRINTED IN FRANCE

If any values are out of limits, the spring (1-370) must be

discarded.

Subtask 32-45-91-200-015-A01

(4) Piston (1-400)

(a) Visual inspection

Make sure that the external diameter is without scratches.

Examine the sides and bottoms of the seal grooves for condition.

Examine the insulator spring groove for condition.

Examine the retaining ring groove for condition.

32--- 45--- 91 Page 5007

JAN 28/10
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

(b) Metallurgical inspection

Do a Fluorescent Penetrant Inspection (FPI) as written in

section 38 of the SPM 32-09-01.

Discard the defective piston (1-400).

Subtask 32-45-91-200-016-A01

(5) Piston sleeve (1-440)

(a) Visual inspection

Examine the threads for metal damage.

Make sure that the internal diameter is without scratches.

Examine the sides and bottoms of the seal grooves for condition.

(b) Metallurgical inspection

Do a Fluorescent Penetrant Inspection (FPI) as written in

section 38 of the SPM 32-09-01.

Discard the defective piston sleeve (1-440).

F. Bolts (1-090) and (1-100)

Subtask 32-45-91-200-017-A01

(1) Visual inspection

Examine the threads for metal damage.

Discard the defective bolts (1-090) and (1-100).

Subtask 32-45-91-200-018-A01

(2) Metallurgical inspection

PRINTED IN FRANCE

Do a Fluorescent Penetrant Inspection (FPI) on the bolts (1-090) and

(1-100) as written in section 38 of the SPM 32-09-01.

If a crack is found, discard the defective bolts.

32--- 45--- 91 Page 5008

JAN 28/10
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

G. Nuts (1-070)

Subtask 32-45-91-200-019-A01

(1) Test of self-locking torque

Examine the condition of the self–locking function of all the nuts

(1-070) as follows:

- Turn each nut on the bolt (1-090) or (1-100) until you see at least
two threads above the top of the nut (1-070).

- Measure the minimum torque necessary to slowly remove the nut

(1-070).

If the measured breakaway torque is not between 2 and 17 N.m

(1.5 and 12.5 lbf.ft), discard the nut (1-070).

H. Heat shield (1-480)

Subtask 32-45-91-200-020-A01

(1) Visual inspection

Examine the heat shield (1-480) for condition.

If a crack is found, discard the heat shield (1-480).

I. Heat sink (1-520)

Subtask 32-45-91-200-021-A01

(1) Visual inspection

Heat sink (1-520) removed ”BEFORE THE END OF THE SERVICE LIFE”

NOTE: The remaining extension of the wear pin indicator (1-510) is

used to take the decision if the heat sink (1-520) is to be
used again until it is fully worn.
PRINTED IN FRANCE

The rotors and the stators can be used again under the following
conditions:

- Absence of play between the drive blocks and the rotors.

- Absence of cracks on the rotor drive blocks and the stirrups.

- Absence of cracks in rivets.

- The inserts on the front stator are not loose.

- Absence of corrosion on the edges of the rotors and the stators.

32--- 45--- 91 Page 5009

JAN 28/10
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

- Absence of excessive (out of tolerance) play of the rotor clamps

(check with the tool S47232).

NOTE: An indentation surface of 5 x 5 mm (0.20 x 0.20 in)

maximum, and an indentation depth lies between 0,5 and
1,0 mm (0.020 and 0.039 in).

- Absence of corrosion in the area of the drive blocks.

There is corrosion when:

- On the edges, there are lines parallel to the friction

surfaces.

- The corrosion preventive coating can be removed with the nail

only.

NOTE: Inspection results in service use may make it necessary to

change the above conditions.

Subtask 32-45-91-200-022-A01

(2) Heat sink (1-520) removed at ”THE END OF ITS SERVICE LIFE”

Dimension of the wear pin indicator (1-510) X = 0 mm (0 in) (refer to

Figure 1001).
PRINTED IN FRANCE

32--- 45--- 91 Page 5010

JAN 19/07
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

REPAIR

TASK 32-45-91-300-801-A01

CONTENTS

1. General Pages

- Job set-up information ................................................... 6002

- General instructions ...................................................... 6003

2. Repair

- Protective treatments ..................................................... 6004

3. Repair procedures Figures

- Painting of the Piston Housing Assembly (1-450) ..................... 6001

- Painting of the Torque Tube (1-490) .................................... 6002

PRINTED IN FRANCE

32--- 45--- 91 Page 6001

APR 30/02
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

TASK 32-45-91-300-802-A01

1. General

A. Job set-up information

Subtask 32-45-91-300-001-A01

(1) Tools, fixtures and equipment

(a) Not applicable.

Subtask 32-45-91-300-002-A01

(2) Consumables

(a) Not applicable.

Subtask 32-45-91-300-003-A01

(3) Referenced information

REFERENCE DESIGNATION

Standard Practices Manual (SPM) Sulphuric acid anodizing of

32-09-01, section 11 aluminum and aluminum alloys

Standard Practices Manual (SPM) Chromic acid anodizing of

32-09-01, section 12 aluminum and aluminum alloys

Standard Practices Manual (SPM) Local repair of the surface

32-09-01, section 14 finish on aluminum alloys by
chemical oxidizing with ALODINE
1200

Standard Practices Manual (SPM) Corrosion removal from steel

PRINTED IN FRANCE

32-09-01, section 21A parts

Standard Practices Manual (SPM) Corrosion removal from aluminum

32-09-01, section 22 and its alloys (passivating
method)

Standard Practices Manual (SPM) Two-coat water reducible/low voc

32-09-01, section 36C flexible epoxy/polyurethane
paint scheme

Standard Practices Manual (SPM) High temperature-resistant water

32-09-01, section 61A reducible paint

32--- 45--- 91 Page 6002

NOV 08/13
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

B. General instructions

Subtask 32-45-91-300-004-A01

(1) Standard repair procedures

The SPM 32-09-01 contains details of all the special treatments

(cleaning, paint removal, protection, inspection, etc.).

The procedures applicable to this section are:

- Sulphuric acid anodizing: section 11.

- Chromic acid anodizing: section 12.

- Local repair of surface finish with chemical oxidizer with ALODINE

1200: section 14.

- Corrosion removal from steel parts: section 21A.

- Corrosion removal from aluminium and its alloys: section 22.

- Painting: sections 36C and 61A.

Subtask 32-45-91-300-005-A01

(2) Corrosion removal except on the heat sink (1-520)

(a) Remove deep corrosion by abrasion of the affected surfaces with

an oilstone or a fiber brush, provided that the external or
internal diameters of hinged or adjacent parts stay in the
limits.

(b) Remove light traces of corrosion by a chemical process, with an

applicable material, if the importance of the corrosion has no
effect on the strength of the part.

Materials recommended:
PRINTED IN FRANCE

- For steel parts, refer to section 21A of the SPM 32-09-01.

- For aluminium alloy parts, refer to section 22 of the SPM

32-09-01.

Subtask 32-45-91-300-006-A01

(3) Key to symbols used

NOTE: Symbols are used in all figures to show surface finishes,

contour and position limits, protective treatments, etc. These
symbols are explained below:

32--- 45--- 91 Page 6003

NOV 08/13
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

(a) Protective treatment (refer to Figures 6001 and 6002)

Pr Post-primer
S
No paint

TASK 32-45-91-300-804-A01

2. Repair

A. Protective treatments

Subtask 32-45-91-300-007-A01

(1) Piston housing assembly (1-450)

- Material: Aluminium alloy 2214.

- Sulphuric acid anodizing as written in section 11 of the SPM

32-09-01 or use chemical oxidizer as written in section 14 of the
SPM 32-09-01.

- Application of paint in accordance with section 36C of the SPM

32-09-01, except for threaded connection ports and the areas not to
be painted shown in Figure 6001.

Subtask 32-45-91-300-008-A01

(2) Torque tube (1-490)

- Material: Steel 15CrMoV6.

- Application of paint as written in section 61A of the SPM 32-09-01,

except for the areas shown in Figure 6002.

Subtask 32-45-91-300-009-A01

(3) Piston sleeve (1-440)

PRINTED IN FRANCE

- Material: Aluminium alloy 7175.

- Chromic acid anodizing as written in section 12 of the SPM 32-09-01

or use chemical oxidizer as written in section 14 of the SPM
32-09-01.

32--- 45--- 91 Page 6004

NOV 08/13
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

C
D
S
22 TO 24 mm
( 0.87 TO 0.94 in)
S
D D S

A
C C
S
C C
A 57 TO 59 mm
( 2.24 TO 2.32 in)

S
S

B
Pr
C C
B
Pr

S
Pr
Pr

171 TO 173 mm A B
( 6.73 TO 6.81 in) S
PRINTED IN FRANCE

PISTON HOUSING Pr
ASSEMBLY (1-450)

PROTECTION TREATMENTS:
Pr
- COMPLETE PAINT SCHEME AS PER
SECTION 36C OF THE SPM 32-09-01,
EXCEPT IN THE AREAS MARKED S Pr

Pr
- PRIMER IN THE AREAS MARKED

Painting of the Piston Housing Assembly (1-450)

Figure 6001/ GRAPHIC 32-45-91-991-601-A01

32--- 45--- 91 Page 6005

JAN 28/10
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

TORQUE TUBE (1-490)

S
PRINTED IN FRANCE

PROTECTION TREATMENT:
- COMPLETE PAINT SCHEME AS PER
SECTION 61A OF THE SPM 32-09-01,
EXCEPT IN THE AREAS MARKED S

Painting of the Torque Tube (1-490)

Figure 6002/ GRAPHIC 32-45-91-991-602-A01

32--- 45--- 91 Page 6006

NOV 08/13
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

ASSEMBLY

TASK 32-45-91-400-801-A01

1. General

A. Job set-up information

Subtask 32-45-91-400-001-A01

(1) Tools, fixtures and equipment

NOTE: You can use equivalent replacements for the special tools and
fixtures.

REFERENCE QTY NAME

89901 1 Spatula
R47226 1 Compression tool
R47227 1 Spanner
R47228 1 Cone to install the adjuster
pin (1-330)
R47229 1 Cone to install the piston
(1-400) to the piston sleeve
(1-440)
F27179000 1 Tool to install the back-up
ring (1-420) of the piston
sleeve (1-440)

Subtask 32-45-91-400-002-A01

(2) Consumables

NOTE: You can use equivalent materials as an alternative to those

PRINTED IN FRANCE

shown below for the special tools and fixtures.

REFERENCE NAME

AIR 4247A Grease

or
SAE-AMS2518 Silicone grease
SI55

32--- 45--- 91 Page 7001

NOV 08/13
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

Subtask 32-45-91-400-003-A01

(3) Referenced information

REFERENCE DESIGNATION

Standard Practices Manual (SPM) Bonding of mating parts with

32-09-01, section 59 Araldite

Subtask 32-45-91-400-004-A01

(4) General instructions

NOTE: The figure of the “ILLUSTRATED PARTS LIST” shows the detail
parts of the component.

NOTE: The parts must be clean and without any temporary corrosive
preventive grease which may have been applied during repairs.

TASK 32-45-91-400-802-A01

2. Assembly of the carbon brake assembly

A. Installation of the heat sink (1-520) on the torque tube (1-490)

Subtask 32-45-91-400-005-A01

(1) Assembly of the heat sink (1-520) on the torque tube (1-490)

CAUTION: WHEN YOU ASSEMBLE THE HEAT SINK (1-520), BE CAREFUL TO

PREVENT THE STATORS AND THE ROTORS FROM TOUCHING:

- PAINT REMOVERS.
- GREASY PRODUCTS.
- PAINTS (THERMOCOLOR, MINIMUM AND MARKING TYPES).
PRINTED IN FRANCE

- SERVICE FLUID.
- CHALK.

CAUTION: THERE IS A RISK OF DAMAGE TO THE CARBON DISKS. DO NOT LET

THEM FALL OR HIT HARD OBJECTS.

CAUTION: MAKE SURE THAT THE SURFACES OF STATORS S1 AND S3 ON WHICH

“NO WEAR SURFACE” IS WRITTEN DO NOT TOUCH THE FRICTION
SURFACES OF ROTORS R1 AND R2 (REFER TO FIGURE 7001).

CAUTION: OBEY THE INDICATIONS WRITTEN DURING “DISASSEMBLY”.

32--- 45--- 91 Page 7002

NOV 08/13
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

(a) Install the rear stator (1-560) on the torque tube (1-490).

(b) Install the two rotor assemblies (1-540) and the center stator
(1-550) on the torque tube (1-490) (refer to Figure 7001).

NOTE: When you install the rotor assemblies (1-540), make sure
that the slots are aligned.

(c) Install the front stator assembly (1-530).

NOTE: When you install the front stator assembly (1-530), make
sure that the inserts point up.

(d) Install the two wear pin indicators (1-510) and the clips
(1-500) into the inserts on the front stator assembly (1-530).

(e) Apply a layer of silicone grease SAE-AMS2518 to the threads of

the bolts (1-090) and (1-100).

(f) Install the bolts (1-090) and (1-100) on the torque tube
(1-490).

NOTE: Make sure of the position of the bolt (1-090) on the

torque tube (1-490).
PRINTED IN FRANCE

32--- 45--- 91 Page 7003

NOV 08/13
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

ROTOR ASSEMBLY ROTOR ASSEMBLY

ITEM No. (1-540) (1-540)

S1 R1 S2 R2 S3

FRONT STATOR CENTER STATOR REAR STATOR

PRINTED IN FRANCE

ITEM No. ASSEMBLY (1-550) (1-560)

(1-530)

Installation of the Heat Sink (1-520)

Figure 7001/ GRAPHIC 32-45-91-991-701-A01

32--- 45--- 91 Page 7004

APR 30/02
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

B. Assembly of the return piston assembly (1-270)

Subtask 32-45-91-400-006-A01

(1) Installation of the seal assemblies (1-380) and (1-390) on a piston

(1-400)

CAUTION: DISCARD ANY RING WHICH SHOWS CONTOUR DEFORMATION.

(a) Install the rubber seal of the seal assembly (1-390) with a
spatula 89901.

(b) Install the back-up rings of the seal assembly (1-390) with a
spatula 89901.

(c) Lubricate the two parts of the seal assembly (1-390) with
hydraulic fluid.

(d) Install the teflon ring of the seal assembly (1-380) first, then
its rubber seal.

NOTE: The chamfer of the rubber seal must be against the teflon
ring.

Subtask 32-45-91-400-007-A01

(2) Installation of the seals on a piston sleeve (1-440)

(a) Use tool F27179000.

NOTE: The tool must be clean.

(b) Install the back-up ring (1-420). Use the cone and the plunger
of the tool F27179000 for this installation.

CAUTION: DISCARD ANY RING WHICH SHOWS CONTOUR DEFORMATION.

(c) Install the half-washers of the tool F27179000 behind the

PRINTED IN FRANCE

back-up ring (1-420) and opposite to the threads of the piston

sleeve (1-440).

(d) Install the resizing ring of the tool F27179000 dry (on the side
of the larger chamfer) and hold the half-washers in position.
Leave the resizing ring in position for 2 hours.

NOTE: After installation, make sure that the resizing ring turns
freely on the piston sleeve (1-440).

(e) Remove the resizing ring and the half-washers.

(f) Install the preformed packing (1-410) with a spatula 89901.

(g) Install the scraper ring assembly (1-430).

32--- 45--- 91 Page 7005

NOV 08/13
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

(h) Install the preformed packing of the scraper ring assembly

(1-430) in its groove of the piston sleeve (1-440) with spatula
89901.

(i) Install the teflon ring of the scraper ring assembly (1-430) in
the piston sleeve (1-440).

Subtask 32-45-91-400-008-A01

(3) Assembly of the return piston assembly (1-270)

WARNING: DURING THE INSTALLATION OF THE SPRING (1-370) IN THE PISTON

(1-400), THE COMPRESSION VALUE IS MORE THAN 1731 N
(389.1 LBF). IF YOU INSTALL THE SPRING (1-370) WITHOUT THE
CORRECT EQUIPMENT OR IF YOU DO NOT OBEY THE INSTRUCTIONS,
THE RESULT MAY BE SERIOUS INJURY.

(a) Install the spring (1-370) and the spring guide (1-360) in the
piston (1-400).

WARNING: IF THE RETAINING RING (1-350) HAS ONE OF ITS OUTER

EDGES LIGHTLY ROUNDED, INSTALL THE RETAINING RING
(1-350) IN SUCH A POSITION THAT THIS ROUNDED EDGE DOES
NOT HOLD THE LOAD.

NOTE: Make sure that the spring (1-370) is fully against the
bottom of the piston (1-400) and that its position is
correct.

(b) Compress the spring (1-370) with the tool R47226 then put the
retaining ring (1-350) into the groove.

(c) Release the load applied to the spring (1-370), then remove the
tool R47226.

(d) Install the pin retainer (1-340) on the adjuster pin (1-330),
then install the cone R47228 on the adjuster pin (1-330).
PRINTED IN FRANCE

(e) Lubricate the cone R47228 and the adjuster pin (1-330) with
hydraulic fluid and install the adjuster pin (1-330) in the
piston (1-400). Then remove the cone R47228.

(f) Apply a layer of hydraulic fluid to the external diameter of the

piston (1-400) and to the preformed packing of the seal assembly
(1-390).

(g) Apply a layer of grease SI55 to the scraper ring assembly

(1-430).

(h) Put the piston (1-400) on a flat surface.

32--- 45--- 91 Page 7006

NOV 08/13
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

(i) Install the piston (1-400) in the piston sleeve (1-440) with the
cone R47229.
NOTE: Make sure that:
- The scraper ring assembly (1-430) is not extruded.
- The piston (1-400) is fully against the pin retainer (1-340).

- The tabs of the piston sleeve (1-440) correctly engage the

slots in the pin retainer (1-340).
(j) Install a new adjuster tube (1-320) on the adjuster pin (1-330).
Install a ball (1-310) and a new self-locking nut (1-300), with
the self-locking nut (1-300) against the flat surface of the
ball (1-310). Torque the self-locking nut (1-300) to a load of
6 N.m (53 lbf.in).

(k) Install the spring (1-290) in the groove of the insulator

assembly (1-280).
NOTE: Install the insulator assembly (1-280) after the
installation of the return piston assembly (1-270) on the
piston housing assembly (1-450).
C. Assembly of the piston housing assembly (1-450) or the return piston
assemblies (1-270)
Subtask 32-45-91-400-009-A01
(1) Installation of the return piston assembly (1-270)
(a) Apply a layer of hydraulic fluid ONLY to the preformed packing
(1-410) and the threads of the piston sleeve (1-440).
(b) Install the return piston assemblies (1-270) with the spanner
R47227. Torque the return piston assemblies (1-270) to a load of
57,5 N.m (42.41 lbf.ft).

(c) Lock the return piston assemblies (1-270) with the lockwire
(1-260) (refer to Figure 7004).
PRINTED IN FRANCE

(d) Install the insulator assembly (1-280) on the return piston

assemblies (1-270). Push and turn the insulator assembly (1-280)
until the spring (1-290) is in the groove in the piston (1-400).
Subtask 32-45-91-400-010-A01
(2) Installation of the bleeder valve (1-180)
(a) Apply a layer of hydraulic fluid to the threads of the seats
(1-190).
(b) Install the seats (1-190) with the preformed packings (1-200).
Torque the seats (1-190) to a maximum load of 12,5 N.m
(9.22 lbf.ft).
(c) Install the bleeder valves (1-180). Torque the bleeder valves
(1-180) to a maximum load of 5 N.m (44 lbf.in).

32--- 45--- 91 Page 7007

NOV 08/13
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

(d) Install the bleeder screws (1-160) with the bleeder washers
(1-170). Torque the bleeder screws (1-160) to a load of
1,75 N.m (15.49 lbf.in).

Subtask 32-45-91-400-011-A01

(3) Installation of the protective plug (1-230)

(a) Apply a layer of hydraulic fluid to the threads of the

protective plugs (1-230).

(b) Loosen and remove the protective plug (1-130) and the non
metallic washer (1-140).

(c) Install the preformed packings (1-240) on the protective plugs

(1-230) with the spatula 89901.

(d) Install the plug assemblies (1-220) and torque them to a load of
11,5 N.m (8.48 lbf.ft).

NOTE: When you install the right or left brake, install the plug
assemblies (1-220) as shown in the Figure 7002.

Subtask 32-45-91-400-012-A01

(4) Installation of the warning plate (1-250)

(a) Make a copy of the old plate data on the new plate.

NOTE: If necessary, write new data on the warning plate (1-250)

to include the effect of any modifications made in the
equipment during its overhaul (refer to the “RECORD OF
SERVICE BULLETINS” section and the “LIST OF EQUIPMENT
MODIFICATIONS” section).

(b) Install the warning plate (1-250). Refer to section 59 of the

SPM 32-09-01.
PRINTED IN FRANCE

32--- 45--- 91 Page 7008

NOV 08/13
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

PLUG ASSEMBLY
(1-220)

AIRCRAFT AIRCRAFT
CONNECTION CONNECTION

LH CARBON BRAKE ASSEMBLY RH CARBON BRAKE ASSEMBLY

FWD
PRINTED IN FRANCE

LH RH LH RH

Installation of LH and RH Carbon Brake Assemblies

Figure 7002/ GRAPHIC 32-45-91-991-702-A01

32--- 45--- 91 Page 7009

JAN 28/10
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

D. Assembly of the carbon brake assembly components

Subtask 32-45-91-400-013-A01

(1) Assembly of the brake structure (1-010)

(a) Install the heat shield (1-480) in position on the torque tube
(1-490) with the heat sink (1-520).

(b) Install the equipped piston housing assembly (1-450) in position

on the torque tube (1-490) with the heat sink (1-520) and the
heat shield (1-480). Align the hole for the temperature sensor
(1-025) with the hole in the spline of the torque tube (1-490).

(c) Apply a layer of silicone grease SAE-AMS2518 to the washer

(1-080) and the nut (1-070).

(d) Install the washer (1-080) and the nut (1-070) on the bolt
(1-100). Torque the nut (1-070) to a load of 82 N.m
(60.5 lbf.ft).

NOTE: Install the washer (1-080) with the inner chamfer against
the nut (1-070).

(e) Lock the bolt (1-100) to the torque tube (1-490) with the
lockwire (1-060A) or (1-060B). Turn the end of the lockwire
(1-060A) or (1-060B) as shown in the Figure 7005. This prevents
the damage to the hub of the main wheel.

(f) After accomplishment of SB C20544-32-050, lock the bolt (1-100)

to the torque tube (1-490) with the cotter pin (1-060C).

Subtask 32-45-91-400-014-A01

(2) Installation of the flange (1-120)

(a) Install the flange (1-120).

PRINTED IN FRANCE

NOTE: Make sure of the position of the flange (1-120) on the

equipped piston housing assembly (1-450).

(b) Apply a layer of silicone grease SAE-AMS2518 to the washers

(1-080) and the nut (1-070).

(c) Install the washers (1-080) and the nuts (1-070) on the bolt
(1-090).

NOTE: Put the washers (1-080) with the inner chamfer against the
nut (1-070).

(d) Torque the nut (1-070) in criss-cross sequence to a load of

82 N.m (60.5 lbf.ft).

32--- 45--- 91 Page 7010

NOV 08/13
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

Subtask 32-45-91-400-015-A01

(3) Installation of the temperature sensor (1-025)

(a) Install the temperature sensor (1-025) in the hole of the

equipped piston housing assembly (1-450) and in the hole of the
spline of the torque tube (1-490).

(b) Install the screw (1-030) and the washer (1-040). Torque the
screw (1-030) to a load of 6 N.m (53 lbf.in).

(c) Lock the screw (1-030) with the lockwire (1-020).

E. Final steps

Subtask 32-45-91-400-016-A01

(1) Test the carbon brake assembly

(a) Test the carbon brake assembly as written in the instructions

given in the “TESTING AND FAULT ISOLATION” section.

Subtask 32-45-91-400-017-A01

(2) Adjustment of the wear pin indicators (1-510) (for a new heat sink
(1-520)) (refer to Figure 7003)

(a) Apply 120 bar (1740 psi) pressure to the carbon brake assembly.

(b) Hold this pressure, then cut the wear pin indicators (1-510) to
a dimension of X = 14,600 to 15,400 mm (0.57480 to 0.60630 in).

(c) Decrease the pressure to zero.

Subtask 32-45-91-400-018-A01

(3) Locking (refer to Figure 7004)

PRINTED IN FRANCE

(a) Lock the bleeder screws (1-160) to the seats (1-190) with the
lockwire (1-150).

(b) Lock the seats (1-190) to the piston housing assembly (1-450)
with the lockwire (1-150).

Subtask 32-45-91-400-019-A01

(4) Painting of the carbon brake assembly

(a) Repair the defective paint layer as written in the “REPAIR”

section.

32--- 45--- 91 Page 7011

JAN 28/10
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

X = 14,600 TO 15,400 mm
(0.57480 TO 0.60630 in)
PRINTED IN FRANCE

DATUM SURFACE

Adjustment of the Wear Pin Indicator (1-510)

Figure 7003/ GRAPHIC 32-45-91-991-703-A01

32--- 45--- 91 Page 7012

JAN 28/10
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

LOCKWIRE LOCKWIRE
(1-150) (1-150)

LOCKWIRE
(1-260)

LOCKWIRE LOCKWIRE
(1-260) (1-260)
PRINTED IN FRANCE

Locking of the Return Piston Assemblies (1-270) and of the Bleeder Valves (1-180)
Figure 7004/ GRAPHIC 32-45-91-991-704-A01

32--- 45--- 91 Page 7013

JAN 28/10
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

DETAIL A

LOCKWIRE
BOLT (1-060A) OR
(1-100) (1-060B)
PRINTED IN FRANCE

THE END OF THE LOCKWIRE

(1-060A) OR (1-060B)
MUST NOT BE LOCATED IN
THIS AREA

Locking of the Bolt (1-100)

Figure 7005/ GRAPHIC 32-45-91-991-705-A01

N
32--- 45--- 91 Page 7014
NOV 08/13
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

FITS AND CLEARANCES - TORQUES VALUES

TASK 32-45-91-290-801-A01

1. Fits and clearances

A. Not applicable.
PRINTED IN FRANCE

32--- 45--- 91 Page 8001

JAN 19/07
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

TASK 32-45-91-290-802-A01

2. Torque values

A. Torque value table

CAUTION: APPLY ANTI-SEIZE MATERIAL AND TORQUE AS SPECIFIED IN THE
“ASSEMBLY” SECTION. IF NOT, THIS CAN CAUSE DAMAGE TO THE PARTS.

IPL FIG. ITEM ANTISEIZE

AND DESCRIPTION TORQUE VALUES PRODUCT
ITEM No REQUIRED

(1-030) Screw 6 N.m (53 lbf.in) AIR 4247A

GREASE

(1-070) Nut 82 N.m (60.5 lbf.ft) AIR 4247A

GREASE

(1-220) Plug assembly 11,5 N.m (8.48 lbf.ft) AIR 3520B

FLUID

(1-160) Bleeder screw 1,75 N.m (15.49 lbf.in) AIR 3520B

FLUID

(1-180) Bleeder valve 5 N.m (44 lbf.in) AIR 3520B

FLUID

(1-190) Seat 12,5 N.m (9.22 lbf.ft) AIR 3520B

FLUID

(1-300) Self-locking nut 6 N.m (53 lbf.in) AIR 4247A

GREASE
PRINTED IN FRANCE

(1-270) Return piston assembly 57,5 N.m (42.41 lbf.ft) AIR 3520B
FLUID

NOTE: If the torque value is:

- Less than 10 N.m (7.4 lbf.ft), the tolerance is 10 percent.

- More than or equal to 10 N.m (7.4 lbf.ft), the tolerance is 5 percent.

32--- 45--- 91 Page 8002

NOV 08/13
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

SPECIAL TOOLS, FIXTURES, EQUIPMENT AND CONSUMABLES

TASK 32-45-91-940-801-A01

1. Special tools and equipment

PART No. DESCRIPTION SUPPLIERS CODE PAGE BLOCK

OR NAME AND WHERE USED
ADDRESS

F21864100 Hydraulic test bench FAJX6 1000

GA47958-500 Drain pipe FAJX6 1000 and

3000

R47226 Compression tool FAJX6 3000 and

7000

R47227 Spanner FAJX6 3000 and

7000

89901 Spatula FAJX6 3000 and

7000

R47228 Cone to install the FAJX6 7000

adjuster pin (1-330)

R47229 Cone to install the FAJX6 7000

piston (1-400) to the
piston sleeve (1-440)

R47230 Tool to extract the FAJX6 3000

insulator assembly
PRINTED IN FRANCE

(1-280)

F27179000 Tool to install the FAJX6 7000

back-up ring (1-420)
of the piston sleeve
(1-440)

S47232 Tool to measure the FAJX6 5000

clearance between the
rotor clamps.

32--- 45--- 91 Page 9001

NOV 08/13
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

TASK 32-45-91-940-802-A01

2. Consumables

NOTE: For complementary information about aqueous cleaning products, refer to

the SL F6137-32-851.

MATERIAL DESCRIPTION SUPPLIERS CODE PAGE BLOCK

OR NAME AND WHERE USED
ADDRESS

AIR 3520B Hydraulic fluid COMMERCIALLY AVAILABLE 1000

or
MIL-PRF-5606H COMMERCIALLY AVAILABLE
or
FHS COMMERCIALLY AVAILABLE
or
H515 COMMERCIALLY AVAILABLE

WHITE SPIRIT Cleaning product COMMERCIALLY AVAILABLE 4000

or
MIL-PRF-680 COMMERCIALLY AVAILABLE
type II
or
Aqueous cleaning Refer to the SL F6137-32-851.
product

SI55 Silicone grease RHONE POULENC 7000

Division Chimie
25,Quai Paul Doumer
92408 COURBEVOIE
FRANCE
PRINTED IN FRANCE

or
SAE-AMS-G-4343 COMMERCIALLY AVAILABLE
or
G392 COMMERCIALLY AVAILABLE

AIR 4247A Grease COMMERCIALLY AVAILABLE 7000

or
MIL-T-5544 COMMERCIALLY AVAILABLE
or
SAE-AMS2518 COMMERCIALLY AVAILABLE

32--- 45--- 91 Page 9002

NOV 08/13
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

ILLUSTRATED PARTS LIST

TASK 32-45-91-950-801-A01

1. INTRODUCTION TO THE ILLUSTRATED PARTS LIST

A. Policy

Subtask 32-45-91-950-001-A01

(1) General

The section is the list of all the components of the unit(s) which
are given in this manual, and permits the identification of these
components. It contains, in the form of indexes, detailed parts list
etc., any necessary data for the procurement of any components.

B. How to use the Illustrated Parts List

Subtask 32-45-91-950-002-A01

(1) Each component is identified as follows:

(a) By the manufacturer’s Part Number.

The alphanumerical index of the manufacturers’ Part Numbers

gives, for each component, on the same line as the Part Number:

- the figure on which the component is shown,

- the item number,

- the total quantity necessary for each CSN,

- the equivalent Part Number, if applicable, given by the

airlines.

(b) By the function of the component.

PRINTED IN FRANCE

The “ILLUSTRATED PARTS LIST“ makes it possible to find the

location of each component on the figures and in the different
groups of parts into which the equipment is broken down.

(c) By the illustration of the component.

1 To idenfify a component by its illustration, use the figure

on which this component is shown. This figure gives the item
number which will permit to refer to the Parts List and get
any data about this component.

2 The Item Numbers have a numerical base. For each figure, the
Item Numbers begin at ”1” and are given in numerical
sequence with regular increments of tens.

32--- 45--- 91 Page 10001

APR 30/02
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

3 They do not change during the total life of the item.

A variant letter is added to the Item Number as a result of
any modification included.

4 Letter ”A” identifies the items of the original version.

Usually, variant letters are not shown on the figures.

NOTE: When the “ILLUSTRATED PARTS LIST“ includes handed

assemblies, the Item Number with numerical base 2
refers to a RH assembly and its variant. The Item
Number with numerical base 1 refers to the LH assembly
and its variant.

NOTE: The numerical order 1, 2, 3, .... 9 is used for the

identification of several assemblies included in a
common “ILLUSTRATED PARTS LIST“. Because there is no
direct relationship between these assemblies, these
are not variants ; but they include a high percentage
of common parts.

NOTE: For ”SELECT FROM” and ”OVERSIZE, UNDERSIZE” parts, the

”ten” increments are changed to ”five” increments.

5 The EFFECTIVITY CODE column shows the Item Number of the next
higher assembly or sub-assembly. For items used on the full
range of the primary equipment, the EFFECTIVITY CODE column
is kept blank. This column is also kept blank for assemblies
located on a line which is not indented (line 1).

6 The ”UNITS PER ASSY” column shows the quantity per assembly
which is necessary for a next higher assembly. In the
indexes, the quantity shown refers to the quantity broken
down for a given CSN.

C. Revision

Subtask 32-45-91-950-003-A01

(1) General
PRINTED IN FRANCE

(a) When a line is modified, new or deleted, there is a letter ”R”

or a vertical black line at the end of the line (the date of
issue is changed).

(b) After each modification of a given item, the numerical Item

Number itself does not change. But the variant letter changes
from ”A” to ”B”, then to ”C” thru ”Z” (do not use letters ”I”
and ”O”).

(c) When it is necessary to add a new part, its name must be on the
line which agrees with the correct position of this part in the
breakdown of the assembly.

Select its Item Number from open sequences.

32--- 45--- 91 Page 10002

APR 30/02
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

(d) Addition of new figures (figure variants):

When the layout of the basic figure does not make it possible to
show new parts or the modified parts in their new form, a new
figure (called ”figure variant”) is then issued.

This figure variant will have the same number as that of the
basic figure, suffixed by a letter given in alphabetical
sequence (do not use ”I” and ”O”).

(e) Deletion of items:

1 Before deletion of items from the “ILLUSTRATED PARTS LIST“:

- Make sure, first, that the modification is applied to all

the applicable assemblies.

- Make sure, for items kept in store, that they are modified
or removed from store.

2 If these two conditions are satisfied, identify the deleted

items, in the nomenclature column, by the word: ”DELETED”.

3 The Part Number of the deleted part is then kept in the

indexes with the word ”DELETED”.

D. Assembly breakdown

Subtask 32-45-91-950-004-A01

(1) General

(a) The assemblies are broken down and each of their components is
shown in the assembly sequence.

(b) The vertical lines of the indention are shown as dotted lines as
follows:

Example : 1 2 3 4 5 6 7
PRINTED IN FRANCE

Assembly

. Component of the assembly

. Sub-assembly

. . Component of the sub-assembly

. . . Detail part

(c) This sequence is, in fact, modified by the nomenclature of the

attaching parts and storage parts. The attaching parts are shown
immediately below the assembly or sub-assembly they attach, and
above the detail parts.

(d) The storage parts are shown immediately below the parts on which
they are installed for protection.

32--- 45--- 91 Page 10003

APR 30/02
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

(e) The attaching parts and storage parts are:

1 Indented in line with the assembly, sub-assembly or part to

which they belong.

2 Identified by the words ”ATTACHING PARTS” or ”STORAGE PARTS”

shown on the line above.

3 Followed by three stars shown on the line below.

E. Words and abbreviations used

Subtask 32-45-91-950-005-A01

(1) General

(a) The most used words and abbreviations are:

- ALT - Alternate

- AR - As Required

- CONT’D - Continued

- DET - Detail

- FIO - For information only

- LH and RH - Left Hand and Right Hand

- NHA - Next Higher Assembly

- NP - Non Procurable

- OPT - Optional

- ORDER OVERLGTH MPN - Full P/N of the manufacturer

- OVERSIZE - UNDERSIZE - ”Oversize/Undersize”

parts
PRINTED IN FRANCE

- RF - For Reference

- RPLD - Replaced by

- RPLS - Replaces

- SB - Service Bulletin

- SEL FROM - ”Select from” parts

- SL - Service Letter

- SUPSD BY - Superseded by

- SUPSDS - Supersedes

32--- 45--- 91 Page 10004

NOV 08/13
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

VENDOR’S CODE LIST

CODE NO.
(F.S.C.M) NAME AND ADDRESS

V25220 BUSAK AND SHAMBAN INC

3904 DELAMO BLVD NO 805
TORRANCE CA 90503-2181
USA
V56878 ESNA - SPS TECHNOLOGIES INC
AEROSPACE AND INDUSTRIAL PRODUCTS DIV
301 HIGHLAND AVENUE
JENKINTOWN PA 19046-2692
USA
V5F573 GREENE TWEED AND CO INC
2075 DETWILER RD PO BOX 305
KULPSVILLE PA 19443-0305
USA
V79136 SEEGER INC
WALDES TRUARC DIV
500 MEMORIAL DR PO BOX 6723
SOMERSET NJ 08875-6723
USA
V92215 FAIRCHILD INDUSTRIES INC FAIRCHILD AEROSPACE FASTENER DIV
DESIGN AND ENGINEERING SOUTH BAY OPNS
3000 W LOMITA BLVD
TORRANCE CA 90505-5102
USA
VF0188 BLANC AERO INDUSTRIES
TOUR GAMMA A
193 RUE DE BERCY
75582 PARIS CEDEX 2
FRANCE
VF1699 BOLLHOFF-OTALU
PRINTED IN FRANCE

ROUTE D’APREMONT ZI DE L’ALBANNE

73490 LA RAVOIRE
FRANCE
VF6137 MESSIER-BUGATTI-DOWTY
INOVEL PARC SUD BP 40
78140 VELIZY-VILLACOUBLAY
FRANCE
VF9023 GREENE TWEED ET CO FRANCE SA
9 CHAUSSEE JULES CESAR
95520 OSNY
FRANCE

VCL

32--- 45--- 91 Page 10005

NOV 08/13
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

PAGE INTENTIONALLY LEFT BLANK

PRINTED IN FRANCE

32--- 45--- 91 Page 10006

NOV 08/13
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

NUMERICAL INDEX

AIRLINE TTL
PART NUMBER FIG ITEM
PART NUMBER REQ

01320747006 01 -460A 1
233-10850-410-3892
SEE EQ72902-4004
23320CA080 01 020A AR
01 060A AR
01 150A AR
01 210A AR
01 260A AR
41320747006 01 460B 1
4772-0258-000
SEE T04-69
722B0MS410-5711 01 390A 6
9224-965 01 410A 6
A33762 01 190A 2
A35055-1 01 120A 1
A35075 01 250A 1
A35079 01 310A 6
A35789-1 01 290A 6
A35793
SEE A36109
A35794 01 500A 2
A36078 01 490A 1
A36087 01 450A 1
A36087-1 01 -470A 1
A36089 01 440A 6
A36090 01 400A 6
A36099 01 360A 6
A36100 01 330A 6
A36101 01 320A 6
A36108 01 550A 1
A36109 01 510A 2
PRINTED IN FRANCE

A36111 01 560A 1
A36112 01 090A 5
A36116 01 480A 1
A36211 01 100A 1
A37150 01 450B 1 R
A46520-4 01 130A 4
A60700-723 01 140A 4
A60701-1308 01 420A 6
AC21999000 01 110A 1
AN6204-2 01 180A 2
BA1172A08
SEE VN465A080
C20544000 01 -001A RF

- Item not illustrated

NUMERICAL INDEX

32--- 45--- 91 Page 10007

NOV 08/13
 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

AIRLINE TTL
PART NUMBER FIG ITEM
PART NUMBER REQ

C20547000 01 025A 1
01 050A 1
DELETED
D56700-0387 01 370A 6
EQ72902-4004 01 380A 6
FN12M02 01 300A 6
GA30323 01 -220A 2
GA31634-1 01 -010A 1
GA31635-1 01 -270A 6
GA31636 01 520A 1
GA31666 01 540A 2
GA31673 01 280A 6
GA31674 01 530A 1
M0A36110 01 340A 6
M83461-1-015 01 200A 2
MS20995C32 01 020B AR R
01 060B AR R
01 150B AR R
01 210B AR R
01 260B AR R
MS24391J4L 01 230A 2
MS24665-88 01 060C 1 R
MS28778-4 01 240A 2
MS35266-59 01 160A 2
MS35338-43 01 170A 2
N5000-118H 01 350A 6
NAS1149C0432R 01 040A 1
NAS1149C0863R 01 080A 6
NAS1351C4H8 01 030A 1
T04-69 01 430A 6
VN465A080 01 070A 6
PRINTED IN FRANCE

- Item not illustrated

NUMERICAL INDEX

32--- 45--- 91 Page 10008

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 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

DETAILED PARTS LIST

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 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

060AB
100

110 080
070
100
090
060C

070

A 080
120

480

160
150 170
180
190
200
140 130

250

450 230
210
PRINTED IN FRANCE

240

460
040
030

020 025

Exploded view of the Carbon Brake Assembly

Figure 1 (sheet 1 of 3)/ GRAPHIC 32-45-91-991-1001-A01

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Part Number C20544000

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 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

500

510
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490

560
540
550
540
530
520

Exploded view of the Carbon Brake Assembly

Figure 1 (sheet 2 of 3)/ GRAPHIC 32-45-91-991-1001-A01

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 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

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 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

390

A
380
360
370
400
B
A
340

330

280

440
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290
350

300 260
420
310 410
320

430
Exploded view of the Carbon Brake Assembly
Figure 1 (sheet 3 of 3) /GRAPHIC 32-45-91-991-1001-A01

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 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

PARTS LIST

UNITS
FIG. PART NUMBER AIRLINE NOMENCLATURE EFF.
PER
ITEM PART No. CODE
1234567 ASSY.
01
-001A C20544000 BRAKE ASSEMBLY, CARBON RF
P/N AMDT A
-010A GA31634-1 .STRUCTURE, BRAKE (NP) 1
020A 23320CA080 ..LOCKWIRE AR
020B MS20995C32 ..LOCKWIRE AR R
POST SL F6137-32-3355
025A C20547000 ..SENSOR, TEMPERATURE 1
SEE CMM 32-45-94 FOR DET
ATTACHING PARTS
030A NAS1351C4H8 ..SCREW 1
040A NAS1149C0432R ..WASHER 1
* * *
-050A C20547000 ..DELETED
060A 23320CA080 ..LOCKWIRE AR
060B MS20995C32 ..LOCKWIRE AR R
POST SL F6137-32-3355
060C MS24665-88 ..PIN, COTTER 1 R
POST SB C20544-32-050
070A VN465A080 ..NUT V92215 6
OPT TO BA1172A08 MADE BY
VF0188
080A NAS1149C0863R ..WASHER 6
090A A36112 ..BOLT 5
100A A36211 ..BOLT 1
110A AC21999000 ..PROTECTOR 1
FOR PRESERVATION ONLY
120A A35055-1 ..FLANGE 1
FOR PRESERVATION ONLY
130A A46520-4 ..PLUG, PROTECTIVE 4
FOR PRESERVATION ONLY
140A A60700-723 ..WASHER, NON METALLIC 4
PRINTED IN FRANCE

FOR PRESERVATION ONLY

150A 23320CA080 ..LOCKWIRE AR
150B MS20995C32 ..LOCKWIRE AR R
POST SL F6137-32-3355
160A MS35266-59 ..SCREW, BLEEDER 2
170A MS35338-43 ..WASHER, BLEEDER 2
180A AN6204-2 ..VALVE, BLEEDER 2
190A A33762 ..SEAT 2
200A M83461-1-015 ..PACKING, PREFORMED 2
210A 23320CA080 ..LOCKWIRE AR
210B MS20995C32 ..LOCKWIRE AR R
POST SL F6137-32-3355
-220A GA30323 ..PLUG ASSEMBLY (NP) 2 R

-Item not illustrated

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 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

PARTS LIST

UNITS
FIG. PART NUMBER AIRLINE NOMENCLATURE EFF.
PER
ITEM PART No. CODE
1234567 ASSY.
01
230A MS24391J4L ...PLUG, PROTECTIVE 1
240A MS28778-4 ...PACKING, PREFORMED 1
250A A35075 ..PLATE, WARNING 1
260A 23320CA080 ..LOCKWIRE AR
260B MS20995C32 ..LOCKWIRE AR R
POST SL F6137-32-3355
-270A GA31635-1 ..PISTON ASSEMBLY, RETURN 6
280A GA31673 ...INSULATOR ASSEMBLY 1
290A A35789-1 ...SPRING 1
300A FN12M02 ...NUT, SELF-LOCKING V56878 1
310A A35079 ...BALL 1
320A A36101 ...TUBE, ADJUSTER 1
330A A36100 ...PIN, ADJUSTER 1
340A M0A36110 ...RETAINER, PIN 1
350A N5000-118H ...RING, RETAINING V79136 1
360A A36099 ...GUIDE, SPRING 1
370A D56700-0387 ...SPRING 1
380A EQ72902-4004 ...SEAL ASSEMBLY 1
ORDER OVERLGTH PN
233-10850-410-3892 MADE BY
V5F573
390A 722B0MS410-5711 ...SEAL ASSEMBLY V5F573 1
400A A36090 ...PISTON 1
410A 9224-965 ...PACKING, PREFORMED VF9023 1
420A A60701-1308 ...RING, BACK-UP 1
430A T04-69 ...RING ASSEMBLY, V25220 1
SCRAPER
OPT TO 4772-0258-000 MADE
BY VF9023
440A A36089 ...SLEEVE, PISTON 1
450A A36087 ..HOUSING ASSEMBLY, PISTON 1
PRINTED IN FRANCE

450B A37150 ..HOUSING ASSEMBLY, PISTON 1 R

-460A 01320747006 ...INSERT, THREAD (NP) 1 R
460B 41320747006 ...INSERT, THREAD VF1699 1
-470A A36087-1 ...HOUSING, PISTON (NP) 450A 1 R
480A A36116 ..SHIELD, HEAT 1
490A A36078 ..TUBE, TORQUE 1
500A A35794 ..CLIP 2
510A A36109 ..INDICATOR, WEAR PIN 2
OPT TO A35793 MADE BY
VF6137
520A GA31636 .SINK, HEAT 1
530A GA31674 ..STATOR ASSEMBLY, FRONT (NP) 1
(POSITION S1)

-Item not illustrated

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 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

PARTS LIST

UNITS
FIG. PART NUMBER AIRLINE NOMENCLATURE EFF.
PER
ITEM PART No. CODE
1234567 ASSY.
01
540A GA31666 ..ROTOR ASSEMBLY (NP) 2
(POSITION R1 AND R2)
550A A36108 ..STATOR, CENTER (NP) 1
(POSITION S2)
560A A36111 ..STATOR, REAR (NP) 1
(POSITION S3)
PRINTED IN FRANCE

-Item not illustrated

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 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

SPECIAL PROCEDURES

TASK 32-45-91-650-801-A01

Not applicable.
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 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

REMOVAL

TASK 32-45-91-010-801-A01

Not applicable.
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 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

INSTALLATION

TASK 32-45-91-410-801-A01

Not applicable.
PRINTED IN FRANCE

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 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

SERVICING

TASK 32-45-91-600-801-A01

Not applicable.
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 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

STORAGE (INCLUDING TRANSPORTATION)

TASK 32-45-91-550-801-A01

1. General

A. Job set-up information

Subtask 32-45-91-550-001-A01

(1) Tools, fixtures and equipment

(a) Not applicable.

Subtask 32-45-91-550-002-A01

(2) Consumables

(a) Not applicable.

Subtask 32-45-91-550-003-A01

(3) Referenced information

REFERENCE DESIGNATION

Standard Practices Manual (SPM) Storage

32-09-01, section 72
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 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

TASK 32-45-91-550-802-A01

2. Storage instruction

A. Refer to section 72 of the SPM 32-09-01.

PRINTED IN FRANCE

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 COMPONENT MAINTENANCE MANUAL

Part Number C20544000

REWORK (SERVICE BULLETIN INSTRUCTIONS)

TASK 32-45-91-840-801-A01

Not applicable.
PRINTED IN FRANCE

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Part Number C20544000

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