® No.

6-636
Eaton August 1997

Heavy Duty Hydrostatic Pumps

Parts & Repair Information

Series 2 Hydrostatic Pumps

Table of Contents
Introduction ............................................................................................................................................................... 3
Required Tools for Disassembly/Reassembly ............................................................................................................ 3
Major Assemblies – Disassembly Order – ID Tag Information ................................................................................... 4
Exploded View Drawing – Charge Pump, End Cover .................................................................................. 5
Exploded View Drawing – Rotating Group .................................................................................................. 6
Exploded View Drawing – Main Housing .................................................................................................... 7
Parts List ................................................................................................................................................................... 8-27
Main Housing ............................................................................................................................................. 11
Servo Piston Sub-Assembly ....................................................................................................................... 11
Swash Bearing Sub-Assembly ................................................................................................................... 11
Propel Valve Plate or V-Groove Plate .......................................................................................................... 12
Bearing Plate .............................................................................................................................................. 12
Drive Shaft Sub-Assembly ......................................................................................................................... 12
Rotating/Swash Plate Assembly ................................................................................................................. 13
Charge Pump Kit Assemblies ..................................................................................................................... 14-15
End Covers ................................................................................................................................................. 16
Control Valves ............................................................................................................................................ 17-25
Manual Control Valve (Kit) .................................................................................................................. 17
Manual Control Valve Wide Band (Kit) ................................................................................................ 17
Manual Control Valve with N/C Neutral Lockout & Potentiometer (Kit) ............................................... 18
Manual Control Valve with N/C Neutral Lockout (Kit) .......................................................................... 19
Manual Control Valve with Potentiometer (Kit) ................................................................................... 20
Solenoid Control Valve, Speed Sensor & Mating Connector (Kits) ...................................................... 21
(EP) Electronic Proportional Displacement Control (Kit) ..................................................................... 22
EP Control Solenoid Actuated Valve Assemblies,
EP Control PWM Module (Kits) ........................................................................................................... 23
(MUX) Multiplex Displacement Control (Kit) ....................................................................................... 24
Low Pressure Relief Valve (Kit) .................................................................................................................. 26
Shaft Seal (Kits) ......................................................................................................................................... 26
Shim Kit, End Cover Bearing ...................................................................................................................... 26
Hold Down (Kits) ........................................................................................................................................ 26
Overhaul Gasket (Kits) ............................................................................................................................... 27
Repair Information – Complete Disassembly ............................................................................................................. 28-33
Repair Information – Complete Reassembly ............................................................................................................. 34-41
Troubleshooting ......................................................................................................................................................... 43
Gauge Requirements, Gauge Port Size and Location ................................................................................. 45
Pressure Readings ..................................................................................................................................... 46
Fault-Logic Troubleshooting ....................................................................................................................... 47-52
Hydraulic Fluid Requirements .................................................................................................................................... 53-54
Special Tools ............................................................................................................................................................. 55-57
Model Code Descriptions ........................................................................................................................................... 58-59

1
Introduction
This Manual provides service information for Eaton Heavy Series 2 Variable Displacement Pumps, Models 33, 39, 46, 54 and
64. Step by step instructions for complete disassembly, inspection and reassembly of the pump are given. The following
recommendations should be followed to insure successful repairs.
• Most repairs require the removal of the pump from the vehicle.
• Cleanliness is extremely important.
• Clean the port areas thoroughly before disconnect the hydraulic lines.
• Plug the pump ports and cover the open hydraulic lines immediately after they’re disconnected.
• Drain the oil and clean the exterior of the pump before making repairs.
• Wash all metal parts in clean solvent.
• Use compressed air to dry the parts. Dot not wipe them dry with paper towels or cloth: lint in a hydraulic system
will cause damage.
• The compressed air should be filtered and moisture free.
• Always use new seals when reassembling hydraulic pumps.
• Lubricate the new rubber seals with a petroleum jelly like Vaseline before installation.
• Torque all bolts over gasketed joints, then repeat the torquing sequence to make-up for gasket compression.
After all repairs are complete it is essential to verify the accuracy of pump repairs on an authorized test stand.

Required Tools for Disassembly/Reassembly

• 1/4 in. Hex Key • Internal Retainer Pliers (Str. Tips)
• 5/16 in. Hex Key • Dial Indicator with Magnetic Base
• 9/16 in. Hex Key • Depth Micrometer with Extensions
• 5/8 in. Hex Key • Parallel Bars (2)
• 12 mm Hex Key • Slide Hammer
• 5/16 in. Socket or End Wrench • Split Blade Bearing Puller
• 1/2 in. Socket or End Wrench • Seal Bullet (Special)
• 9/16 in. Socket or End Wrench • Low Clearance Bearing Puller (Special)
• 11/16 in. End Wrench • Hammer (Steel and Plastic)
• 3/4 in. Socket or End Wrench • Small Machinist Ruler
• 1 in. Socket or End Wrench • Small Flashlight
• 1 1/4 in. Socket or End Wrench • Light Petroleum Jelly
• Breaker Bar or Ratchet Wrench • Suitable Solvents and Cleaners
• Torque Wrench (200 Max. Capacity) • Low Clearance Bearing Puller (Special)
• Adjustable Pliers Special Tools are shown on pages 55-57
• Screwdrivers (Small & Large)
• Internal Retaining Pliers (str. .047 Tips)

3
4

Major Assemblies -– Series 2 Variable Displacement Pump

Order of Major disassembly is:

1. Control (as applicable)
Caution: Before attempting to disassemble pump refer to the 2. Auxiliary Mounting Adaptor (if applicable)
3. Charge Pump Cover
detailed disassembly instructions starting on Page 28 4. End Cover
5. Rotating Group & Shaft
6. Servo Piston
2 Auxiliary Mounting Adaptor 7. Main Housing

3 Charge Pump Cover

4 End Cover

1 Control

5 Rotating Assembly
& Shaft

6 Servo Piston

ID Tag 7 Main Housing

A Displacement cu. in./rev.
0033 = 3.3
0039 = 3.9 A B C
0046 = 4.6
0054 = 5.4
0064 = 6.4
B Identifies Type of Product
Eaton
Model No. 0000 00 - 000
22 = Variable Displacement Pump
Serial No. 00 00 000000
C Identifies Specific Unit Configuration
D Month of Manufacture Rotation
Eaton Corporation NOTE: This is a typical Series 2 configuration
E Year of Manufacture D Hydraulics Division your model may differ slightly from this view
F Specific Serial Number of Unit Spencer, Iowa 51301
depending on features installed.
G Identifies Direction of Input Shaft Rotation
Observed from Shaft End of Unit G E F
CW = Clockwise
CCW = Counterclockwise
For Detailed Model Code Listings refer to Pages 58-59
 Exploded View Drawing – Series 2 Variable Displacement Pump

15
66

65

66
79
4

Detail of Charge Pump &

95
Adaptor Pads are on Pages 15 & 16 63
3 60
59
55
64
63 57

42
43
13

67

4
56

55 41

76

78
5

NOTE: This is a typical Series 2 configuration

your model may differ slightly from this view
Model Number 33 39 46 54 64 depending on features installed.
3
cm /rev 54,4 63,7 75,4 89,2 105,5
Displacement
in3/rev 3.32 3.89 4.59 5.44 6.44
A Items
5
6

Exploded View Drawing – Series 2 Variable Displacement Pump B Items

14

26
Because critical calibrations have
56 been made at the factory the Servo
Assembly should not be disassembled.

56
12
47

53
54

NOTE: This is a typical Series 2 configuration

your model may differ slightly from this view
depending on features installed.
53 45
54 46

44

46 45
 Exploded View Drawing – Series 2 Variable Displacement Pump

Control Valve
6
(Refer to pages 17-23 for Valve Options)

7 Control Valve Gasket

27
28

2 62
31

40
66

30
32
1

27 116
28 118

66 117
66 32

29

ID Tag
31 87 119
Refer to
67 86 Optional
85 Page 4
86 for details
Optional 85 49
Plug Optional
Magnetic Speed Sensor
61
48

C Items
7
 Parts List – Series 2 Variable Displacement Pump
Item Part No. Qty. Description
1 C ♦ 1 Main Housing (see parts list on page 11)
2 C ♦ 1 Drive Shaft Sub-Assembly (see parts list on page 12)
3 A ♦ 1 End Cover (see parts list on page 16)
4 A 103090-325 8 Hex Bolt HD 3/8-16 Gr8 (54,4 - 63,7 - 75,4 cm3/rev)
103091-325 8 Hex Bolt HD 7/16-16 Gr8 (89,2 - 105,5 cm3/rev)
5 A ◊ 1 End Cover Gasket (54,4 -63,7 - 75,4 cm3/rev)
5 A ◊ 1 End Cover Gasket (89,2 - 105,5 cm3/rev)
6 C ♦ 1 Control Valve (see Control Valves on pages 17 through 24)
7 C ♦ 1 Control Valve Gasket (see Control Valves on pages 17 through 24)
12 B ♦ 1 Rotating Kit Assembly (see Assembly Parts List on page 13)
13 A ♦ 1 Propel Valve Plate (see Assembly Parts List on page 12)
14 B ♦ 1 Bearing Plate (see Assembly Parts List on page 12)
15 A ◊ 1 Eccentric Ring (see Charge Pump Assembly Parts List on page 14-15)
15 A ◊ 1 Gerotor Assembly (see Charge Pump Assembly Parts List on page 14-15)
15 A ◊ 1 Valve Plate, High Torque Charge Pump (see Charge Pump List on page 14-15)
15 A ◊ 1 Charge Pump Cover (see Charge Pump Kit Assembly Parts List on page 14-15)
15 A ◊ 4 Sealing Washer (see Charge Pump Kit Assembly Parts List on page 14-15)
15 A ◊ 4 Cap Screw 5/16-18 Soc HD 1-1/2" (see Charge Pump Parts List on page 14-15)
◊ 4 Cap Screw 5/16-18 Soc HD 1-3/4"(see Charge Pump Parts List on page 14-15)
◊ 4 Cap Screw 5/16-18 Soc HD 2" (see Charge Pump Parts List on page 14-15)
15 A ◊ 1 Charge Pump Drive Shaft (see Charge Pump Kit Assembly Parts List on page 14-15)
15 A ◊ 1 Key (see Charge Pump Kit Assembly Parts List on page 14-15)
◊ 1 Key (see Charge Pump Kit Assembly Parts List on page 14-15)
15 A ◊ 1 Retaining Ring (see Charge Pump Kit Assembly Parts List on page 14-15)
◊ 1 Retaining Ring (see Charge Pump Kit Assembly Parts List on page 14-15)
15 A ◊ 1 O-Ring (see Charge Pump Kit Assembly Parts List on page 14-15)
◊ 1 O-Ring (see Charge Pump Kit Assembly Parts List on page 14-15)
15 A ◊ 1 Charge Shaft Bushing (pressed inside Charge Pump Cover)
◊ 1 Charge Shaft Bushing (pressed inside Charge Pump Cover)
15 A ◊ 1 Valve Plate, High Torque Charge Pump
28 C 108300 2 Ring Seal (54,4 - 63,7 - 75,4 cm3/rev) (see gasket kit 990710-000 page 27)
26 B ♦ 1 Servo Piston Sub-Assembly (see Sub-Assembly Parts List on page 11)
27 C ◊ 2 O-Ring (see kit 990710-000 page 27)
28 C 108300 2 Ring Seal (54,4 - 63,7 - 75,4 cm3/rev) (see gasket kit 990710-000 page 27)
108915 2 Ring Seal (89,2 - 105,5 cm3/rev) (see gasket kit 990710-000 page 27)
29 C 108145 1 Servo Piston Cover (54,4 - 63,7 - 75,4 cm3/rev)
108372 1 Servo Piston Cover (89,2 - 105,5 cm3/rev)
30 C 109331 1 Servo Piston Cover (54,4 - 63,7 - 75,4 cm3/rev)
108371 1 Servo Piston Cover (89,2 - 105,5 cm3/rev)
31 C 95862-088 8 Hex Bolt HD 5/16-18 Gr 5 (54,4 - 63,7 - 75,4 cm3/rev)
95912-088 8 Screw, Cap Soc HD 5/16-18 Gr 8 (89,2 - 105,5 cm3/rev)
32 C ◊ 2 O-Ring (54,4 - 63,7 - 75,3 cm3/rev) (see gasket kit 990710-000 page 27)
40 C 103232 1 Bearing Cup (54,4 - 63,7 - 75,4 cm3/rev)
103807 1 Bearing Cup (89,2 - 105,5 cm3/rev)
Legend ♦ Refer to specific item assembly parts list.
◊ Parts included in Kit. (Refer to specific Parts Kit list.)
8
Parts List – Series 2 Variable Displacement Pump
Item Part No. Qty. Description
41 A ◊ A/R Bearing Shim (54,4 - 63,7 - 75,4 cm3/rev) (see Shim kit 990715-000 page 26)
◊ A/R Bearing Shim (89,2 - 105,5 cm3/rev) (see Shim kit 990388-000 page 26)
42A43A 108295-000 1 Bearing Cup/ Bearing Cone S/A (54,4 - 63,7 - 75,4 cm3/rev)
42A43A 990386-000 1 Bearing Cup/ Bearing Cone S/A (89,2 - 105,5 cm3/rev)
44 B ♦ 2 Swash Bearing (54,4 - 63,7 - 75,4 cm3/rev) (see assembly parts list on page 11)
♦ 2 Swash Bearing (89,2 - 105,5 cm3/rev) (see assembly parts list on page 11)
45 B 108331 2 Race Pin
46 B 108823 2 Clocking Link (54,4 - 63,7 - 75,4 cm3/rev)
108973 2 Clocking Link (89,2 - 105,5 cm3/rev)
47 B 108152 1 Slide Block (54,4 - 63,7 - 75,4 cm3/rev)
108349 1 Slide Block (89,2 - 105,5 cm3/rev)
48 C ◊ 1 Low Pressure Relief Valve Plug (see LPRV Kit 9900713-000 page 26)
49 C ◊ 1 O-Ring (see gasket kit 990710-000 page 27)
53 B 108214 2 Hold Down Spring
54 B 16048-480 2 Hold Down Washer
55 A 107582 2 Hollow Dowel (54,4 - 63,7 - 75,4 cm3/rev)
108369 2 Hollow Dowel (89,2 - 105,5 cm3/rev)
56 A/B 98202 3 Dowel
57 A ◊ 4 Static Face Seal (see gasket kit 990710-000 page 27)
59 A ◊ 2 O-Ring (located between end cover and housing see page 27)
60 A ◊ 2 Back-up Ring (located between end cover and housing see page 27)
61 C 25083-01 1 O-Ring Plug
62 C 107887 1 O-Ring Plug Soc HD
63 A 25706-006 2 O-Ring Plug
64 A 25090-010 1 O-Ring Plug
65 A 25090-004 3 O-Ring Plug
66 A/C 25083-004 12 O-Ring Plug (not all positions shown in views)
67 A/C 25083-002 3 O-Ring Plug (used with IPOR if option is installed)
68 96559 1 Shipping Strap (54,4 - 63,7 - 75,4 cm3/rev) (not shown in view)
69 101822 1 Shipping Strap (89,2 - 105,5 cm3/rev) (not shown in view)
76 A 108840-xxx 2 Relief Valve, POR (Optional)
xxx = last 3 digits indicate pressure setting i.e. -300 = 3000 psi
78 A 109183-xxx 1 Relief Valve and or Check Valve (B Port)
xxx =last 3 digits indicate pressure setting i.e. -450 = 4500 psi
79 A 109183-xxx 1 Relief Valve and or Check Valve (A Port)
xxx = last 3 digits indicate pressure setting i.e. -650 = 6500 psi
80 ♦ 1 Control Valve Orfice
81 ♦ 1 Control Valve Orfice
82 ♦ 1 Control Valve Supply Orfic,
83 95653-012 2 Soc Pipe Plug .125-27 NPTF (inside charge pump inlet port)
84 95653-006 2 Soc Pipe Plug .062-27 NPTF(inside charge pump inlet port)
85 C ◊ 1 Magnetic Speed Sensor (see Speed Sensor Kit page 21)
108307 1 Plug (Optional)
86 C 16160-125 1 Retaining Ring (Optional)
Legend ♦ Refer to specific item assembly parts list. A/R – As Required
◊ Parts included in Kit. (Refer to specific Parts Kit list.)
9
 Parts List – Series 2 Variable Displacement Pump
Item Part No. Qty. Description
87 C ◊ 1 O-Ring (see gasket kit 990710-000 page 27)
95 A ◊ 1 Charge Pump Adaptor Kits see page 14-15)
116 C ◊ 1 Drive Shaft Seal (see Shaft Seal Kit page 26)
117 C ◊ 1 Ring, Retaining (see Shaft Seal Kit page 26)
118 C ◊ 1 Spacer (see Shaft Seal Kit page 26)
119 C 95653-012 1 Soc Pipe Plug .125-27 NPTF (Optional) Used only with remote or pressure side
filtration.

Legend ♦ Refer to specific item assembly parts list.

◊ Parts included in Kit. (Refer to specific Parts Kit list.)
10
Parts List – Series 2 Variable Displacement Pump
Item 1 C
Main Housing
Item Part No. Qty. Description
1C 109747 1 Main Housing – 54,4 - 63,7 - 75,4 cm3/rev
109745 1 Main Housing – 54,4 - 63,7 - 75,4 cm3/rev – with IPOR
109746 1 Main Housing – 54,4 - 63,7 - 75,4 cm3/rev – with Speed Sensor
109384 1 Main Housing – 54,4 - 63,7 - 75,4 cm3/rev – with IPOR and Speed Sensor
109755 1 Main Housing – 89,2 - 105,5 cm3/rev
109754 1 Main Housing – 89,2 - 105,5 cm3/rev – with IPOR
109753 1 Main Housing – 89,2 - 105,5 cm3/rev – with Speed Sensor
108812 1 Main Housing – 89,2 - 105,5 cm3/rev – with IPOR and Speed Sensor
110484 1 Main Housing – 89,2 - 105,5 cm3/rev

Item 26 B
Servo Piston Sub-Assembly Hole indicates with Pressure Override

Because critical calibrations have

been made at the factory the Servo
Assembly should not be disassembled.
1. Standard 2. With Pressure Override

Note: There are two types of Servo Control Assemblies

They are NOT interchangeable.

Servo Piston Sub-Assembly

Part Number Part Number Part Number Part Number Part Number
3 3 3 3
Item Qty Description 54,4 cm /rev 63,7 cm /rev 75,4 cm /rev 89,2 cm /rev 105,5 cm3/rev
26 B 1 Servo Piston S/A* 109558-002 109558-001 109558-001 110018-000 110018-000
1 Servo Piston S/A 109559-002 109559-001 109559-001 110017-000 110017-000
* - with POR (Pressure Override)

Item 44 B
Swash Bearing Sub-Assembly
Servo Piston Sub-Assembly
Part Number Part Number Part Number Part Number Part Number
3 3 3
Item Qty Description 54,4 cm /rev 63,7 cm /rev 75,4 cm /rev 89,2 cm /rev 105,5 cm3/rev
3

44 B 1 Swash Bearing S/A* 107575 107575 107575 108707 108707

* Two Swash Bearings are needed when replacing we recommend that both Bearing Assemblies be replaced.

11
 Parts List – Series 2 Variable Displacement Pump

Item 13 A
Propel Valve Plate or
V-Groove Plate
CW Propel Valve Plate CW V-Groove Plate

Plate, Propel Valve or Plate, V-Groove Part Number Part Number Part Number Part Number
Model 33, 39 Model 46 Model 54 Model 64
Item Qty Description 54,4 - 63,7 cm3/rev 75,4 cm3/rev 89,2 cm3/rev 105,5 cm3/rev
13 A 1 Propel Valve Plate - CCW 107224 107784 103848 103976
13 A 1 Propel Valve Plate - CW 106458 106459 104297 103950
13 A 1 V-Groove Plate - CCW 106988 107808 104857 107143
13 A 1 V-Groove Plate - CW 106456 106457 104964 104006
CCW – Counter Clockwise CW – Clockwise

Item 14 B
Bearing Plate
Bearing Plate Part Number Part Number Part Number Part Number
Model 33, 39 Model 46 Model 54 Model 64
Item Qty Description 54,4 - 63,7 cm3/rev 75,4 cm3/rev 89,2 cm3/rev 105,5 cm3/rev
14 B 1 Bearing Plate 103241 104198 103852 103814

Item 2 C
Drive Shaft Sub-Assembly
All Drive Shafts listed are used with High Torque Charge Pumps
Item Part No. Qty. Description
2C 108029* 1 Drive Shaft S/A 23 Tooth 16/32 Input Pitch Spline – 27 Tooth 24/48 Pitch Spline Output
includes 103227 Pressed Bearing Cone and 103222-188 Retaining Ring.

109738* 1 Drive Shaft S/A 23 Tooth 16/32 Input Pitch Spline – 27 Tooth 24/48 Pitch Spline Output
includes 103227 Pressed Bearing Cone and 103222-188 Retaining Ring -
3/8 - 24 UNF -2B .75 deep threaded hole in shaft end.

108625* 1 Drive Shaft S/A 14 Tooth 12/24 Input Pitch Spline – 27 Tooth 24/48 Pitch Spline Output
includes 103227 Pressed Bearing Cone and 103222-188 Retaining Ring.

108646* 1 Drive Shaft S/A 21 Tooth 16/32 Input Pitch Spline – 27 Tooth 24/48 Pitch Spline Output
includes 103227 Pressed Bearing Cone and 103222-188 Retaining Ring.

108382** 1 Drive Shaft S/A 23 Tooth 16/32 Input Pitch Spline – 27 Tooth 24/48 Pitch Spline Output
includes 103808 Pressed Bearing Cone and 103222-200 Retaining Ring. Models 54,64.

109140** 1 Drive Shaft S/A 14 Tooth 8/16 Input Pitch Spline – 27 Tooth 24/48 Pitch Spline Output
includes 103808 Pressed Bearing Cone and 103222-200 Retaining Ring. Models 54,64.

10133** 1 Drive Shaft S/A 13 Tooth 8/16 Input Pitch Spline – 27 Tooth 24/48 Pitch Spline Output
includes 103808 Pressed Bearing Cone and 103222-200 Retaining Ring. Models 54,64.
* – Models 33, 39 and 46 (54,4 - 63,7 - 75,4 cm3/rev)
12 ** – Models 54 and 64 (89,2 - 105,5 cm3/rev)
 Parts List – Series 2 Variable Displacement Pump
Standard Slipper Wide Land Slipper
Item 12 B (from page 6)
Rotating/Swash Plate Assembly

12-B
12-A

12-2
12-3
12
12-4

12-5

12-6

12-7
12-8
12-9
12-10
12-11

12-12
Note: The Bearing Plate is item 14 on page 6
12-13
and is listed on Pages 8 and 12.
The Hold Down Springs and Hold Down
12-14
Washers are listed on Pages 6 and 9

Model 33, 39 Model 46 Model 54 Model 64

Rotating/Swash Plate Assembly 3 3 3
54,4 - 63,7 cm /rev 75,4 cm /rev 89,2 cm /rev 105,5 cm3/rev
Item Qty Description Part Number Part Number Part Number Part Number
12 1 Rotating/Swash Plate Assy. 109752* 109367* 108424* 109435*
Wide Land ✔ 110292* ✔ 110563* ✔ 110290* ✔ 110546* ✔
12-A 1 Rotating Group Kit** 109428 109419 109431 109434
Wide Land ✔ 110291 ✔ 110562 ✔ 110289 ✔ 110545 ✔
12-B 1 Barrel Kit 990730-000 990731-000 990732-000 990733-000
12-2 1 Retaining Ring ‡ 103278-200 ‡ 130278-200 ‡ 103278-225 ‡ 103278-225
12-3 1 Spacer Cyl Barrel Spring ‡ 103242 ‡ 103242 ‡ 103815 ‡ 103815
12-4 1 Cylinder Barrel Spring ‡ 103240 ‡ 103240 ‡ 103813 ‡ 103813
12-5 1 Spacer Shaft Spring ‡ 107758 ‡ 107758 ‡ 108337 ‡ 108337
12-6 1 Barrel and Sleeve ‡ 109427 ‡ 109418 ‡ 109430 ‡ 109433
12-7 4 Cap Screw (Kit) NSS ‡ 990723-000 ‡ 990723-000 ‡ 990724-000 ‡ 990724-000
12-8 4 Washer (Kit) NSS ‡ 990723-000 ‡ 990723-000 ‡ 990724-000 ‡ 990724-000
12-9 2 Hold Down Strap (Kit) NSS ‡ 990723-000 ‡ 990723-000 ‡ 990724-000 ‡ 990724-000
12-10 4 Fixed Clr. Spacer (Kit) NSS ‡ 990723-000 ‡ 990723-000 ‡ 990724-000 ‡ 990724-000
12-11 1 Slipper Retainer Plate 103244 104211 103853 103817
12-12 9 Slipper Piston S/A 109768 109748 109757 109758
9 Slipper Piston S/A ✔ 110216 ✔ 106609 ✔ 110220 ✔ 110222 ✔
12-13 1 Fixed Clr Thrust Plate 107854 107854 108341 108341
12-14 1 Swash Plate S/A 109366 109366 109254 109254
NSS - Not Sold Separately S/A - Sub Assembly ‡ – Parts included in Rotating/Swash Plate Assy. ✔ – Wide Land Slipper
* These are Complete Rotating/Swash Plate Group Assemblies and include Items 12-2 through 12-14.
** Rotating Group Kit includes item 12-B (Barrel Kit), item 12-11 (Slipper Retaining Plate) and item 12-12 (Slipper piston S/A).

13
14

Parts List – Series 2 Variable Displacement Pump

Item 15 A
Charge Pump Kit Assemblies 15-3

15-4
15-5
15-1 15-6
15-7
15-8

15-2 15-9

15-10

A-Pad

15-A

15-C A-pad, High Torque Charge Pump, Dual 2 Bolt Mount,

15-D
No Shaft Seal, 9 Tooth 16/32 Pitch Spline
15-B
(Available For All Models)
B-pad, High Torque Charge Pump, Dual 2 Bolt Mount,
B, BB-Pad
No Shaft Seal, 13 Tooth 16/32 Pitch
Spline (Available For All Models)
BB-pad, High Torque Charge Pump, Dual 2 Bolt Mount,
No Shaft Seal, 15 Tooth 16/32 Pitch
Spline (Available For All Models)
C-pad, High Torque Charge Pump, 4 Bolt Mount, No
Shaft Seal, 14 Tooth 12/24 Pitch Spline
(Available For All Models)

C-Pad
 Item 15 A
Charge Pump Kit Assemblies
Adaptor Flange Charge Sealing Charge
Adaptor Charge Retaining Eccentric
Charge Pump Kit Bolts O-Ring Pad Adaptor Cover Bolts Washers Cover Shaft Key Gerotor S/A Valve Plate
Kit Number Displacement O-Ring Cover S/A Ring Ring
Description (4 ea) Cust. 15-C (4 ea) (4 ea) O-Ring 15-5 15-6 15-9 15-10
15-D 15-3 15-7 15-8
15-A 15-B 15-1 15-2 15-4

990665-000 No Pad - High Torque 14cc/.85CID N/A N/A N/A N/A 95912-150 103223-000 108026-000 8761-157 109302-001 101305-000 109312-000 107882-001 107881-001 108362-000

990677-000 No Pad - High Torque 14cc/.85CID N/A N/A N/A N/A 95912-150 103223-000 108026-000 8761-157 109302-001 101305-000 109312-000 N/A N/A N/A

990680-000 A Pad - High Torque 14cc/.85CID 103090-125 8761-042 108075-000 8761-159 95912-150 N/A 108027-000 8761-157 109303-001 101305-000 109312-000 N/A N/A N/A

990668-000 A Pad - High Torque 14cc/.85CID N/A 8761-042 N/A 8761-159 95912-150 N/A 108027-000 8761-157 109303-001 101305-000 109312-000 107882-001 107881-001 N/A

990671-000 B Pad - High Torque 14cc/.85CID N/A 8761-045 N/A N/A 95912-150 N/A 108027-000 8761-157 109304-001 101305-000 109312-000 107882-001 107881-001 N/A

990683-000 B Pad - High Torque 14cc/.85CID 103090-125 8761-045 108076-000 8761-159 95912-150 N/A 108027-000 8761-157 109304-001 101305-000 109312-000 N/A N/A N/A

990686-000 BB Pad - High Torque 14cc/.85CID 103090-125 8761-045 108076-000 8761-159 95912-150 N/A 108027-000 8761-157 109305-001 101305-000 109312-000 N/A N/A N/A

990674-000 BB Pad - High Torque 14cc/.85CID N/A N/A N/A N/A 95912-150 N/A 108027-000 8761-157 109305-001 101305-000 109312-000 107882-001 107881-001 N/A

990666-000 No Pad – High Torque 21cc/1.28CID N/A N/A N/A N/A 95912-175 103223-000 108026-000 8761-157 109302-003 101311-000 109312-000 107882-003 107881-003 108362-000

990678-000 No Pad – High Torque 21cc/1.28CID N/A N/A N/A N/A 95912-175 103223-000 108026-000 8761-157 109302-003 101311-000 109312-000 N/A N/A N/A

990681-000 A Pad – High Torque 21cc/1.28CID 103090-125 8761-042 108075-000 8761-159 95912-175 N/A 108027-000 8761-157 109303-003 101311-000 109312-000 N/A N/A N/A

990669-000 A Pad – High Torque 21cc/1.28CID N/A 8761-042 N/A 8761-159 95912-175 N/A 108027-000 8761-157 109303-002 101311-000 109312-000 107882-003 107881-003 N/A

990672-000 B Pad – High Torque 21cc/1.28CID N/A 8761-045 N/A 8761-159 95912-175 N/A 108027-000 8761-157 109304-002 101311-000 109312-000 107882-003 107881-003 N/A

990684-000 B Pad – High Torque 21cc/1.28CID 103090-125 8761-045 108706-000 8761-159 95912-175 N/A 108027-000 8761-157 109304-002 101311-000 109312-000 N/A N/A N/A

990687-000 BB Pad – High Torque 21cc/1.28CID 103090-125 8761-045 108706-000 8761-159 95912-175 N/A 108027-000 8761-157 109305-002 101311-000 109312-000 N/A N/A N/A

990675-000 BB Pad – High Torque 21cc/1.28CID N/A 8761-045 N/A 8761-159 95912-175 N/A 108027-000 8761-157 109305-002 101311-000 109312-000 107882-003 107881-003 N/A

990667-000 No Pad – High Torque 28cc/1.70CID N/A N/A N/A N/A 95912-200 103223-000 108026-000 8761-157 109302-004 101311-000 109312-000 107882-004 107881-004 108362-000

990679-000 No Pad – High Torque 28cc/1.70CID N/A N/A N/A N/A 95912-200 103223-000 108026-000 8761-157 109302-004 101311-000 109312-000 N/A N/A N/A

990682-000 A Pad – High Torque 28cc/1.70CID 103090-125 8761-042 108075-000 8761-159 95912-200 N/A 108027-000 8761-157 109303-002 101311-000 109312-000 N/A N/A N/A

990670-000 A Pad – High Torque 28cc/1.70CID N/A 8761-042 N/A 8761-159 95912-200 N/A 108027-000 8761-157 109303-002 101311-000 109312-000 107882-004 107881-004 N/A

990673-000 B Pad – High Torque 28cc/1.70CID N/A 8761-045 N/A 8761-159 95912-200 N/A 108027-000 8761-157 109304-002 101311-000 109312-000 107882-004 107881-004 N/A

990685-000 B Pad – High Torque 28cc/1.70CID 103090-125 8761-045 108076-000 8761-159 95912-200 N/A 108027-000 8761-157 109304-002 101311-000 109312-000 N/A N/A N/A

990676-000 BB Pad – High Torque 28cc/1.70CID 103090-125 8761-045 108076-000 8761-159 95912-200 N/A 108027-000 8761-157 109305-002 101311-000 109312-000 N/A N/A N/A

990688-000 BB Pad – High Torque 28cc/1.70CID 103090-125 8761-045 108076-000 8761-159 95912-200 N/A 108027-000 8761-157 109305-002 101311-000 109312-000 N/A N/A N/A

990673-000 No Pad – High Torque 28cc/1.70CID N/A 8761-045 N/A 8761-159 95912-200 N/A 108027-000 8761-157 109302-002 101311-000 109312-000 107882-004 107881-004 N/A

990742–000 C Pad - High Torque 14cc/.85CID 104511-150 (6 ea.) 8761–158 108081-000 8761–159 ◊ ◊ 108027-000 8761-157 109306-001 101311-000 109312-000 ◊ ◊ ◊
21cc/1.28CID
990743–000 C Pad - High Torque
28cc/1.70CID
104511-150 (6 ea.) 8761–158 108081-000 8761–159 ◊ ◊ 108027-000 8761-157 109306-002 101311-000 101312-000 ◊ ◊ ◊

◊ = When replacing use the existing Bolts, Eccentric Ring , Gerotor S/A and Valve Plate.
15

NOTE: All Parts can be purchased separately.

 Parts List – Series 2 Variable Displacement Pump
Item 3 A
End Covers*

Item Part No. Qty. Displacement Main Ports POR Options

3A 110718 1 54,4 & 63,7 cm3/rev 62 N Remote Filter Ports
110568 1 54,4 & 63,7 cm3/rev 61 N
110619 1 54,4 & 63,7 cm3/rev 61 Y
110300 1 54,4 & 63,7 cm3/rev 62, M12X1.75 N
110202 1 54,4 & 63,7 cm3/rev 62, M12X1.75 Y
109766 1 54,4 & 63,7 cm3/rev 62 Y
109493 1 54,4 & 63,7 cm3/rev 62 N
108896 1 54,4 & 63,7 cm3/rev 62 Y Remote Filter Ports
108859 1 75,4 cm3/rev 62 Y Remote Filter Ports
110560 1 75,4 cm3/rev 62 N Remote Filter Ports
110628 1 75,4 cm3/rev 61 Y
110301 1 75,4 cm3/rev 62, M12X1.75 N
110201 1 75,4 cm3/rev 62, M12X1.75 Y
109470 1 75,4 cm3/rev 62 N
109147 1 75,4 cm3/rev 62 Y
110358 1 89,2 cm3/rev 61 Y Remote Filter Ports
110541 1 89,2 cm3/rev 61 Y
110356 1 89,2 cm3/rev 62 N Remote Filter Ports
110270 1 89,2 cm3/rev 61 N
109783 1 89,2 cm3/rev 62 Y
109784 1 89,2 cm3/rev 62 Y Remote Filter Ports
109281 1 89,2 cm3/rev 62 N
109400 1 89,2 cm3/rev 62 N Pressure Transducer
108344 1 105,5 cm3/rev 62 Y
109176 1 105,5 cm3/rev 62 N
109145 1 105,5 cm3/rev 62 N Pressure Transducer
109742 1 105,5 cm3/rev 62 Y Remote Filter Ports
109845 1 105,5 cm3/rev 62, M12X1.75 Y Pressure Side Filter
110322 1 105,5 cm3/rev 62 N Remote Filter Ports
110357 1 105,5 cm3/rev 61 Y Remote Filter Ports

* All listed End Covers are for High-Torque Charge Pumps

POR = Pressure Override

16
Parts List – Series 2 Control Valve Assemblies
Item 6 C
Control Valves
990704-000 – Manual Control Valve (Kit)

Item Part No. Qty. Description

6C 990704-000 1 Manual Control Valve (Kit)
includes below;
110038-001 1 Manual Control Valve S/A
108992-000 1 Control Gasket
95912-088 1 Cap Screw SOC HD 5/16-18 GR 8
95912-150 4 Cap Screw SOC HD 5/16-18 GR 8
109280-000 1 Control Link S/A
96081-031 1 Nut 5/16-18
96100-031 1 Washer
103048-000 1 Control Lever
95729-000 1 Control Lever

990708-000 – Manual Control Valve Wide Band (Kit)

Item Part No. Qty. Description
6C 990708-000 1 Manual Control Valve Wide Band (Kit)
includes below;
110038-002 1 Manual Control Valve Wide Band S/A
108992-000 1 Control Gasket
95912-088 1 Cap SOC HD 5/16-18 GR 8
95912-150 4 Cap Screw SOC HD 5/16-18 GR 8
109280-000 1 Control Link S/A
96081-031 1 Nut 5/16-18
96100-031 1 Washer
103048-000 1 Control Lever
95729-000 1 Control Lever

17
 Parts List – Series 2 Control Valve Assemblies
990706-000 – Manual Control Valve with N/C Neutral Lockout
& Potentiometer (Kit)
990764-000 – Neutral Lockout
Switch Mating Connector Kit*
Connector (1) – Cross Reference Delphi/Packard P/N 1201 5792
Terminal (2) – Cross Reference Delphi/Packard P/N 1208 9040
Cable Seal (2) – Cross Reference Delphi/Packard P/N 1201 5323
Recomended wire size: 18 - 20 AWG
Recomended cable diameter: 2.03 - 2.85 mm
* Alternate reference source: Pioneer Standard Electronics 1-800-257-6613

Item Part No. Qty. Description

6C 990706-000 1 Manual Control Valve with N/C Neutral Lockout & Potentiometer (Kit)
includes below;
110040-000 1 Manual Control Valve with N/C Neutral Lockout & Potentiometer
7C 108992-000 1 Control Gasket
95912-088 1 Cap Screw SOC HD 5/16-18 GR 8
95912-150 4 Cap Screw SOC HD 5/16-18 GR 8
109280-000 1 Control Link S/A
96081-031 1 Nut 5/16-18
96100-031 1 Washer
103048-000 1 Control Lever
95729-000 1 Control Lever
◊ 107851-000 1 Potentiometer
◊16040-208 2 Screw 8-32 UN
◊ 95897-008 2 Washer
◊ 107762-000 1 Potentiometer Gasket
109195-000 1 Feedback Shaft S/A
8761-010 1 O-Ring
109196-000 1 Hollow Dowel
N/C = Normally Closed ◊ = Parts included in Kit P/N 990719-000 see Below

990719-000 – Potentiometer Kit 990763-000 – Potentiometer

Part No. Qty. Description Mating Connector Kit*
107851-000 1 Potentiometer Connector (1) – Cross Reference Delphi/Packard P/N 1201 0717

16040-208 2 Screw SF Head Mach 8-32 UN Terminal (3) – Cross Reference Delphi/Packard P/N 1208 9040
Cable Seal (3) – Cross Reference Delphi/Packard P/N 1208 9679
95897-008 2 Washer
Recomended wire size: 18 - 20 AWG
107762-000 1 Potentiometer Gasket
Recomended cable diameter: 1.6 - 2.15 mm
* Alternate reference source: Pioneer Standard Electronics 1-800-257-6613

18
Parts List – Series 2 Control Valve Assemblies
990705-000 – Manual Control Valve with N/C Neutral Lockout (Kit)

Item Part No. Qty. Description

6C 990705-000 1 Manual Control Valve with N/C Neutral Lockout (Kit)
includes below;
110039-000 1 Manual Control Valve with N/C Neutral Lockout
7C 108992-000 1 Control Gasket
95912-088 1 Cap Screw SOC HD 5/16-18 GR 8
95912-150 4 Cap Screw SOC HD 5/16-18 GR 8
109280-000 1 Control Link S/A
96081-031 1 Nut 5/16-18
96100-031 1 Washer
103048-000 1 Control Lever
95729-000 1 Control Lever
N/C = Normally Closed

990764-000 – Neutral Lockout Switch

Mating Connector Kit*
Connector (1) – Cross Reference Delphi/Packard P/N 1201 5792
Terminal (2) – Cross Reference Delphi/Packard P/N 1208 9040
Cable Seal (2) – Cross Reference Delphi/Packard P/N 1201 5323
Recomended wire size: 18 - 20 AWG
Recomended cable diameter: 2.03 - 2.85 mm
* Alternate reference source: Pioneer Standard Electronics 1-800-257-6613

19
 Parts List – Series 2 Control Valve Assemblies
990707-000 – Manual Control Valve with Potentiometer (Kit)
990763-000 – Potentiometer
Mating Connector Kit*
Connector (1) – Cross Reference Delphi/Packard P/N 1201 0717
Terminal (3) – Cross Reference Delphi/Packard P/N 1208 9040
Cable Seal (3) – Cross Reference Delphi/Packard P/N 1208 9679
Recomended wire size: 18 - 20 AWG
Recomended cable diameter: 1.6 - 2.15 mm
* Alternate reference source: Pioneer Standard Electronics 1-800-257-6613

Item Part No. Qty. Description

6C 990707-000 1 Manual Control Valve with Potentiometer (Kit)
includes below;
110025-000 1 Manual Control Valve with Potentiometer
7C 108992-000 1 Control Gasket
95912-088 1 Cap Screw SOC HD 5/16-18 GR 8
95912-150 4 Cap Screw SOC HD 5/16-18 GR 8
109280-000 1 Control Link S/A
96081-031 1 Nut 5/16-18
96100-031 1 Washer
103048-000 1 Control Lever
95729-000 1 Control Lever
◊ 107851-000 1 Potentiometer
◊ 16040-208 2 Screw 8-32 UN
◊ 95897-008 2 Washer
◊ 107762-000 1 Potentimeter Gasket
109195-000 1 Feedback Shaft S/A
8761-010 1 O-Ring
109196-000 1 Hollow Dowel
◊ = Parts included in Kit P/N 990719-000 see Page 18

20
Parts List – Series 2 Control Valve Assemblies
Solenoid Control Valve Assemblies & Mating Connector (Kits)
6

6B
6A

Item Part No. Qty. Description

990765-000 Solenoid Control
6 990718–000 1 SA Control Valve with Mating Connector Kit*
Potentiometer24Vdc (Kit) Solenoid Mating Connector Kit
SA Control Valve with Connector (1) – Cross Reference Delphi/Packard P/N 1212 4583
110114–000 1 Potentiometer 24Vdc S/A Terminal (4) – Cross Reference Delphi/Packard P/N 1204 5773

includes below: Cable Seal (4) – Cross Reference Delphi/Packard P/N 1204 8086
Secondary Lock (1) – Cross Reference Delphi/Packard P/N 1204 7948
6A 109453 1 Coil, 24Vdc S/A
Recomended wire size: 18 - 20 AWG
6B 108724 2 Proportional Solenoid Cartridge Recomended cable diameter: 2.03 - 2.78 mm
6 990693–000 1 SA Control Valve with Potentiometer Mating Connector Kit
Potentiometer 12Vdc (Kit) Connector (1) – Cross Reference Delphi/Packard P/N 1201 0717
SA Control Valve with Terminal (3) – Cross Reference Delphi/Packard P/N 1208 9040
109124–000 1 Potentiometer 12Vdc Cable Seal (3) – Cross Reference Delphi/Packard P/N 1208 9679
includes below; Recomended wire size: 18 - 20 AWG

6A 109132 1 Coil, 12Vdc S/A Recomended cable diameter: 1.6 - 2.15 mm

* Alternate reference source: Pioneer Standard Electronics 1-800-257-6613
6B 108724 2 Proportional Solenoid Cartridge

Both Kits include below;

7C 108876–000 1 Control Gasket

95912–125 2 Cap Screw Soc HD 5/16-18 GR8

95912–175 5 Cap Screw Soc HD 5/16-18 GR8

◊ 107851–000 1 Potentiometer

◊ 16040–208 2 S/F Head Mach Screw 8-32 UN

◊ 95897–008 2 Washer

◊ 107762–000 1 Potentiometer Gasket

109195–000 1 Feedback Shaft S/A

8761–010 1 O–Ring

109196–000 1 Hollow Dowel

◊ = Parts included in Kit P/N 990719-000 see Page 18
21
 Parts List – Series 2 Control Valve Assemblies
(EP) Electronic Proportional Dispalacement Control (Kits)

990762-000 – EP Control Mating

Connector Kit*
Command Input Signal Mating Connector
Connector (1) – Cross Reference Delphi/Packard P/N 1211 0293
Terminal (3) – Cross Reference Delphi/Packard P/N 1204 8074
Cable Seal (3) – Cross Reference Delphi/Packard P/N 1204 8086
Secondary Lock (1) – Cross Reference Delphi/Packard P/N 1205 2845
Recomended wire size: 18 - 20 AWG
Recomended cable diameter: 2.03 - 2.80 mm
Power Supply Mating Connector
Connector (1) – Cross Reference Delphi/Packard P/N 1205 2641
Terminal (2) – Cross Reference Delphi/Packard P/N 1204 8074
Neutral Adjustment Cable Seal (2) – Cross Reference Delphi/Packard P/N 1204 8086
Secondary Lock (1) – Cross Reference Delphi/Packard P/N 1205 2634
Recomended wire size: 18 - 20 AWG
Recomended cable diameter: 2.03 - 2.80 mm
* Alternate reference source: Pioneer Standard Electronics 1-800-257-6613

Screw, Cap EP Control Screw,

Control Gasket Soc HD Control Link Electronics Button Head
Valve Kit Valve S/A Control 5/16-18 GR8 S/A S/A Cap 10-24 Lockwasher
Kit Number Description Qty 1 Qty 1 Qty 5 Qty 1 Qty 1 Qty 4 Qty 4

EP Control 24 Vdc
990703–000 110307–024 110003–000 95912–200 109280–000 110224-100 101673-175 16045-203
±100mA

EP Control 12Vdc
990702–000 110307–012 110003–000 95912–200 109280–000 110224-100 101673-175 16045-203
±100mA

EP Control 24Vdc
990701–000 110307–024 110003–000 95912–200 109280–000 110224-505 101673-175 16045-203
±5 Vdc

EP Control 12Vdc
990700–000 110307–012 110003–000 95912–200 109280–000 110224-505 101673-175 16045-203
±5 Vdc

EP Control 24Vdc
990699–000 110307–024 110003–000 95912–200 109280–000 110224-420 101673-175 16045-203
4-20mA

EP Control 12Vdc
990698–000 110307–012 110003–000 95912–200 109280–000 110224-420 101673-175 16045-203
4-20mA

EP Control 24Vdc
990697–000 110307–024 110003–000 95912–200 109280–000 110224-015 101673-175 16045-203
1-5 Vdc

EP Control 12Vdc
990696–000 110307–012 110003–000 95912–200 109280–000 110224-015 101673-175 16045-203
1-5 Vdc

22
Parts List – Series 2 Control Valve Assemblies
EP Control Solenoid Actuated Valve Assemblies (Kits)

990767-000 – EP Solenoid Mating

Connector Kit*
EP Solenoid Mating Connector Kit
Connector (1) – Cross Reference Delphi/Packard P/N 1204 7950
Terminal (4) – Cross Reference Delphi/Packard P/N 1204 8074
Cable Seal (4) – Cross Reference Delphi/Packard P/N 1204 8086
Secondary Lock (1) – Cross Reference Delphi/Packard P/N 1204 7948
Recomended wire size: 16 - 18 AWG
Recomended cable diameter: 2.03 - 2.80 mm

Coil 24Vdc P/N 110306-024 (1) * Alternate reference source: Pioneer Standard Electronics 1-800-257-6613

Coil 12Vdc P/N 110306-012 (1)

Solenoid Tube S/A P/N 110561 (2)

Screw, Cap
Control Gasket Soc HD Control Link Solenoid
Valve S/A* Control 5/16-18 GR8 S/A Tube S/A Coil 12 Vdc Coil 24 Vdc
Kit Number Kit Description Qty 1 Qty 1 Qty 5 Qty 1 Qty 2 Qty 1 Qty 1

EP Control Solenoid
990695–000 110307–024 110003–000 95912–200 109280–000 110561 N/A 110306–024
Actuated 24 Vdc

EP Control Solenoid
990694–000 110307–012 110003–000 95912–200 109280–000 110561 110306–012 N/A
Actuated 12 Vdc

Above parts are included in the Kit but may be purchased separately.
* Includes Solenoid Tube S/A and Coil

23
 Parts List – Series 2 Control Valve Assemblies
(MUX) Multiplex Displacement Control 990768-000 – MUX Mating
Connector Kit*
MUX Mating Connector
Connector** (1) – Cross Reference Delphi/Packard P/N 1203 4163
Terminal.(8) – Cross Reference Delphi/Packard P/N 1210 3881
Cable Seal Plug (6) – Cross Reference Delphi/Packard P/N 1203 4413
Recomended wire size: 16 - 18 AWG
Recomended cable diameter: 2.03 - 2.40 mm
* Alternate reference source: Pioneer Standard Electronics 1-800-257-6613
** Includes Cable Seal
Note: 3 Way Connector and 4 Way connector interface with SA Control Valve with Potentiometer

refererence on Page 21.

990750-000 – MUX Displacement Control (Kit)

Item Part No. Qty. Description
6C 990750-000 1 MUX Displacement Control (Kit)
includes below;
109831-002 1 Programmed MUX Controller S/A
101673-200 1 Screw, SOC Button Head Cap, 10-24
101673-150 2 Screw, SOC Button Head Cap, 10-24
109011-000 1 Stand Off 54-64

Item 85
990745-000 Speed Sensor Kit 990766-000 – Speed Sensor Mating
Part No. Qty. Description Connector Kit*
107852-000 1 Magnetic Speed Sensor Connector*** (1) – Cross Reference Delphi/Packard P/N 1216 2193
16160-125 1 Retaining Ring Terminal (2) – Cross Reference Delphi/Packard P/N 1212 4075
8761-016 1 O-Ring Recomended wire size: 16 - 18 AWG
108307-000 1 Plug Recomended cable diameter: 2.0 - 2.40 mm
* Alternate reference source: Pioneer Standard Electronics 1-800-257-6613
*** Includes Cable Seal

990660-000 – Solenoid Control and

Speed Sensor Mating Connector Kit*
Kit includes: 990765-000 Solenoid Control Mating Connector Kit
990766-000 Speed Sensor Mating connector Kit

24
 Parts List – Series 2 Kits
990713-000
Low Pressure Relief Valve Kit
Item Part No. Qty. Description Approximate
48 C 9900713-000 1 LPRV Plug S/A PSI .020 Shim
Includes Below:
300 – 320 = 5 Shims
48-1 109077-00 1 LPRV Plug
48-2 8785-012 1 O-Ring 320 – 340 = 6 Shims
48-3 108870-002 1 LPRV Spring
340 – 348 = 7 Shims
48-4 108869-000 1 LPRV Poppet
48-5 16048-253* 10 Shim (.020) 435 = 12 Shims
LPRV = Low Pressure Relief Valve * See table for the Required Shims to Acheive PSI setting

990709-000 990753-000
Shaft Seal Kit – Models 33, 39, 46 Shaft Seal Kit – Models 54, 64
54,4 – 63,7 – 75,4 cm3/rev 89,2 – 105,4 cm3/rev
Item Part No. Qty. Description Item Part No. Qty. Description
116 C 108395-000 1 Drive Shaft Seal 116 C 110192-000 1 Drive Shaft Seal
117 C 101680-250 1 Retaining Ring 117 C 101680-250 1 Retaining Ring
118 C 107836-000 1 Spacer 118 C 107836-000 1 Spacer

990715-000 990388-000
Shim Kit, End Cover Bearing Shim Kit, End Cover Bearing
Models 33, 39, 46 / 54,4 – 63,7 – 75,4 cm3/rev Models 54, 64 / 89,2 – 105,4 cm3/rev
Item Part No. Qty. Description Item Part No. Qty. Description
41 A 107744-003 1 Bearing Shim 41 A 103798-003 1 Bearing Shim
41 A 107744-005 1 Bearing Shim 41 A 103798-005 1 Bearing Shim
41 A 107744-010 1 Bearing Shim 41 A 103798-010 1 Bearing Shim
41 A 107744-015 1 Bearing Shim 41 A 103798-015 1 Bearing Shim
41 A 107744-020 1 Bearing Shim 41 A 103798-020 1 Bearing Shim
41 A 107744-030 1 Bearing Shim 41 A 103798-030 1 Bearing Shim

990723-000 990724-000
Hold Down Kit – Models 33, 39, 46 Hold Down Kit – Models 54, 64
54,4 – 63,7 – 75,4 cm3/rev 89,2 – 105,4 cm3/rev

Item Part No. Qty. Description Item Part No. Qty. Description
12-6 95912-100 4 Cap Screw 5/16-18 12-6 95912-125 4 Cap Screw 5/16-18
12-7 108377-000 4 Washer 12-7 108377-000 4 Washer
12-8 107858-000 4 Hold Down Strap 12-8 108340-000 4 Hold Down Strap
12-9 103237-001 4 Spacer 12-9 103237-002 4 Spacer

26
Parts List – Series 2 Kits
990710-000
Repair Gasket Kit
Item Part No. Qty. Description
5 A 108480-000 1 End Cover Gasket
(54,4 - 63,7 - 75,3)
5 A 108974-000 1 End Cover Gasket
(89,2 - 105,5)
15-2 A 103223-000 4 Sealing Washer
15-4 A 8761-156 1 O-Ring (charge Cover)
15-4 A 8761-157 1 O-Ring (charge Cover)
27 C 8761-144 2 O-Ring (54,4 - 63,7 - 75,3)
27 C 8761-157 2 O-Ring (89,2 - 105,5)
28 C 108300-000 2 Ring Seal (54,4 - 63,7 - 75,3)
28 C 108915-000 2 Ring Seal (89,2 - 105,5)
32 C 8761-139 2 O-Ring (54,4 - 63,7 - 75,3)
32 C 8761-145 2 O-Ring (89,2 - 105,5)
26 B 16254-8 1 Thread Seal
49 C 8785-012 2 O-Ring
57 A 110457-000 4 Static Face Seal
59 A 8761-017 2 O-Ring
60 A 108562-000 2 Back-up Ring
87 C 8761-016 1 O-Ring (speed sensor)
91 107762-000 1 Gasket, (potentiometer)
93 8761-010 1 O-Ring (potentiometer)
15-B 8761-042 2 O-Ring A-Pad (cust)
15-B 8761-045 2 O-Ring B-Pad (cust)
15-B 8761-158 1 O-Ring C-Pad (cust)
15-C 8761-157 1 O-Ring Pad (charge cover)
15-C 8761-158 1 O-Ring Pad (charge cover)
7C 110003-000 1 EP Control Gasket
7C 108992-000 1 MAN Control Gasket
7C 108879-000 1 SOL Control Gasket
8785-008 1 O-Ring
104713-000 1 Dust Seal
8785-004 19 O-Ring
8785-016 2 O-Ring
8785-002 1 O-Ring
8785-010 1 O-Ring
8785-006 2 O-Ring

27
 Repair Information – Series 2 Variable Displacement Pump
The following repair information may be used in the inspection, Next remove the control valve
conversion and repair of the Eaton Series 2 Variable Displace- assembly gasket and discard.
ment Pump. The Pump Shown in this section incorporates the (see Figure 4)
manual displacement control, high pressure relief valves, inter-
nal pressure override valves and the high trorque auxiliary pump
option.

Complete Disassembly Figure 4

The following procedures describe complete disassembly of the

Series 2 variable displacement pump. As the variable displace-
ment pump is available in two frame sizes with many displace-
ments and options, these procedures cover the basic units only. Remove the control valve feed-
The procedures for the back assembly by simply lifting
units with options that are it straight up. (see Figure 5)
not shown are basically the
same. The level of cleanli-
ness maintained when re-
pairing the pump could af- Figure 5
fect pump performance.
Figure 1 Work in a clean area. After
washing the parts with Depending upon the type of
clean solvent, blow the parts dry with air. Inspect all mating control used, and application
surfaces. Replace all damaged parts. Do not use grit paper, files used on, determines orifice size
or grinders on finished parts. and location. The orifices are
staked in three places to retain
NOTE: Whenever a pump is disassembled, it is a good policy to them in their pockets. The ori-
replace all seals. Lubricate new seals with petroleum jelly be- fices sizes are stamped on the
Figure 6
fore installation. Use only clean, recommended hydraulic fluid face of each orifice. These ori-
on finished surfaces before reassembly. fices need not be removed un-
less orifice size need to be changed. (see Figure 6)
It is recommended that the exterior of the pump be thoroughly
cleaned before disassembly. Make sure all open ports are sealed.

To remove the input shaft The orifice on earlier manufac-

Figure 7
seals retaining ring, use a tured pump (P) were either
pair of internal retaining staked in the control housing
ring pliers with .090 shown here or a loose fit in the
straight tips and carefully control housing. (see Figure 7)
remove the retaining ring
and spacer ring(s) from
Figure 2 the pump housing. It will
be easier to remove the
actual shaft seal later on during the disassembly of the pump .
(see Figure 2).
Using a 9/16 hex key or allen
To remove the control valve assembly, use 1/4 in. bit socket or
wrench, remove the socket
hex key and remove the
head plug. This plug is used to
control valve assembly’s
retain the clocking link which we
five retaining cap screws.
will remove later. (see Figure 8)
With the retaining cap
screws removed, remove Figure 8
the control valve assembly
by simply lifting it straight
Figure 3 up. (see Figure 3)

28
Repair Information – Series 2 Variable Displacement Pump
Next using a 9/16 hex key Shown here are all the parts used
or allen wrench remove in the internal pressure override.
the two high pressure re- Valve plug, shims spring end and
lief valves or check valve valve poppet. (See Figure 14)
assemblies. (see Figure 9)

Figure 9 Figure 14

NOTE: The internal pressure override valve setting can be changed

Depending upon the pumps model, the pump will incorporate simply by adding or deleting shims.
either two high pressure
relief valves or check valve
assemblies. When high
pressure relief valves are Next, using a 1-1/4 in. socket or
used, the high pressure end wrench, remove the charge
relief valve located on the pressure relief valve plug and
low side of the closed cir- valve spring and valve poppet
cuit will act as a check from the pump housing. (see
Figure 10
Figure 10 Figure 15)
valve. (see Figure 10)
Figure 15
The high pressure relief
valve settings are marked
on the end of each relief Shown here are all the parts used
valve assembly as shown in the charge pressure relief
here. (see Figure 11) valve. Plug, shims, valve spring
and valve poppet. The charge
pressure relief valve setting can
Figure 11 be changed simply by adding or
Figure 16 deleting shims. (see Figure 16)
Note: Some models use a single
Using a 12 mm hex key or charge pressure relief valve car-
allen wrench remove the tridge.
two optional internal pres- Figure 17
sure override valve plugs, Next, using a 5/16 in. hex key or
springs and spring end. allen wrench remove the auxil-
NOTE: Not all models in- iary pump mounting flange re-
corporate these optional taining cap screws. With the
Figure 12 internal pressure override retaining cap screws removed,
valves. (see Figure 12) remove the mounting flange
from the pump end cover (see
Using a pair of needle Figure 17)
nose pliers remove the
valve poppet. (see Figure
13)
Turn the auxiliary pump adapter
over and using an O-Ring pick
or similar tool, remove the seal-
Figure 13 ing ring. (see Figure 18)

Figure 18

29
 Repair Information – Series 2 Variable Displacement Pump
Using a 1/4 bit socket or With the gerotor outer ring re-
Figure 19
hex key, remove the charge moved from the eccentric ring,
pump cover retaining cap remove the eccentric ring. The
screws. (see Figure 19) position of this eccentric ring
in the end cover is one of the
items used to determine
charge pump input rotation.
Figure 25 Before removing you may want
to note its position for reas-
Figure 20
With the cap screws re- sembly. (see Figure 25)
moved, remove the charge
pump cover by using a Next, remove the charge pump
large pair of adjustable pli- valve plate. The position of this
ers. Remove by gently valve plate is also used to de-
rocking the cover back- termine charge pump input ro-
and-forth as you pull up- tation. Before removing you
ward. (see Figure 20) may also want to note its po-
sition. (see Figure 26)
Next, remove the charge Figure 26
pump covers sealing O-
ring from the pump end
cover. (see Figure 21) Using the proper size socket or
end wrench, remove the end
cover retaining cap screws.
Figure 21 Caution should be used when
removing the retaining cap
screws as the end cover has
Remove the charge pump
an internal preload. If the end
coupling and gerotor star.
Figure 27 cover does not rise when the
(see Figure 22)
cap screws are loosened, you
may have to tap the end cover to break the gasket seal.

With the retaining cap screws removed, carefully remove the pump
Figure 22
end cover. When removing, Caution must be used not to drop any
internal parts such as the valve plate, bearing cup, etc. which may or
may not stick to the end cover. Caution must be used when handling
The gerotor star is a slip fit
all close tolerance parts. (see Figure 27)
on the coupling and is
driven by a small key, cau- Carefully turn the end cover
tion must be used not to over and remove the valve
lose this key. To remove plate and dowel pin. (see Fig-
the star, simply slide it ure 28)
from the coupling. It is not
Figure 23 necessary to remove the
retaining ring from the
coupling as it is used for location purposes only. (see Figure Figure 28
23)

Next, remove the gerotor

outer ring from the eccen- With the valve plate removed,
tric ring located in the remove the rear bearing cup
pump end cover. (see Fig- from the end cover. This bear-
ure 24) ing cup is a slip fit into the end
cover. (see Figure 29)

Figure 24 Figure 29

30
Repair Information – Series 2 Variable Displacement Pump
Next, remove the rear bear- Figure 34 Figure 34 Next, remove the bearing plate
ing shims from the end and two dowel pins from the
cover. Make sure not to cylinder barrel. NOTE: If a
misplace these shims, as small screwdriver or similar
they are used to adjust the tool is used to pry the bearing
main pump shaft bearing plate from the cylinder barrel,
Figure 30 end play or preload. (see extreme caution must be used
Figure 30) not to scratch or damage the
cylinder barrel’s or bearing
plates lapped surfaces. (see
Figure 34)
Do not remove the two In-
ternal Pressure Override Shown here are both the valve
passage plugs located in and bi-metal bearing plates.
the end cover as shown The bearing plates are inter-
here. However, if the unit changeable with the same se-
you are working on has the ries plates used on the series
Internal Pressure Override one transmissions. The valve
Figure 31 option and you are going plates are also interchangeable
to change the pump input Figure 35 with the same series plates
rotation, these two plugs must be removed and installed into used on the series one tandem
the other two passage ports. (see Figure 31) pumps. The bearing plates are bidirectional and the valve plates are
unidirectional. (see Figure 35)
Remove the two hollow
dowels from the pump Next , remove the hold-down
housing. (see Figure 32) Figure 36
springs. (see Figure 36)

NOTE: Earlier units did not use

washers.

Figure 32

Using an O-ring pick or

similar tool, remove the Figure 37 Install a low clearance split type
sealing O-rings and backup bearing puller under the rear
rings from the pump hous- bearing. You can use the same
ing. Only units with the size and type of puller that was
optional Internal Pressure used on the EATON Series 0 or
Override option incorpo- ball guide transmissions. (see
Figure 33 rated the additional O-rings Figure 37) NOTE: IF you do
and backup rings as shown not have a low clearance puller,
here. (see Figure 33) please see the special tool sec-
tion located on page 57 in the back of this manual for the dimensions
NOTE: Like in the pump end cover, when ever the pump input required to make a low clearance puller.
rotating is changed, the two passage plugs located in the pump
housing must also be removed and installed into the other two Install the puller on the split
ports. type bearing puller. Do not re-
move the rear bearing at this
time. Use the puller handle to
remove the pump shaft,
swashplate and rotating group
from the pump housing. (see
Figure 38 Figure 38)

31
 Repair Information – Series 2 Variable Displacement Pump
Shown here is a simple Reposition the swashplate and
wooden box that may be rotating group back on the sup-
used to support the rotat- port base. Next, using a 1/4 in.
Figure 44 allen wrench or bit socket, re-
ing group during disas-
sembly and reassembly. move the screws, spacers and
Cut two radius that match strap from only one side of the
the radius machined on swashplate. At this time also
Figure 39 loosen the other side. This will
the back side of the
swashplate into the top of make it easier to retain the as-
the box. (see Figure 39) sembly during handling. (see
Figure 44)
Figure 40 With the swashplate and
rotating group supported, Reposition the swashplate and
remove the slide block rotating group on a clean flat sur-
from the swashplate. (see face. Carefully remove the
Figure 40) swashplate from the rotating
group. Again using a 1/4 in. allen
wrench or bit socket remove the
Figure 45 screws, spacers and strap from
the other side of the swashplate.
(see Figure 45)
Next, remove the rear
Figure 41
bearing by using the bear- Shown here are all the parts used
ing puller that was previ- for the fixed hold down, retain-
ously installed. (see Fig- ing cap screws, washers, straps,
ure 41) spacers and thrustplate. (see
Figure 46)

Figure 46

Figure 42
With the rear bearing re-
moved, carefully slide the After separating the cylinder bar-
swashplate and rotating rel assembly from the swash-
group up and over the plate, remove the piston assem-
pump shaft assembly. blies and piston retainer and
(see Figure 42) place them on a clean protective
surface for inspection and clean-
ing. (see Figure 47)
Figure 47

Remove the pump shaft Using a 5/8 allen wrench or bit

assembly from the sup- socket remove the clocking link
port box. When it is nec- retaining plug. (see Figure 48)
essary to replace the front
bearing, a hydraulic press
will be needed to remove
the bearing from the shaft.
Figure 43
Replacement bearings are Figure 48
pressed to a specific di-
mension. These dimensions, per each pump model, are listed
on page 57 in the back of this manual. (see Figure 43)

32
Repair Information – Series 2 Variable Displacement Pump
Next, remove the two Next, using a 3/4 in. end wrench,
Figure 49
swashplate bearings and remove the servo adjustment
clocking links. (see Fig- screw lock nut and special bev-
ure 49) eled washer from the adjustable
side servo piston cover. (see Fig-
ure 55)

Figure 55

After removing the two With the lock nut and washer re-
Figure 50
swashplate bearings and moved, use a 1/2 in. end wrench
clocking links, remove the or socket and remove the retain
two bearing races from cap screws from the servo pis-
the pump housing. (see ton cover. Remove the servo pis-
Figure 50) ton cover from the pump hous-
ing. (see Figure 56)
Figure 56

Shown here is only one

Figure 51
side of the swashplate Next, remove the servo cover by
bearing assembly, clock- unscrewing it from the servo pis-
ing link, bearing race and ton adjustment screw. (see Fig-
bearing. (see Figure 51) ure 57)
The other side is identical.

Figure 57
With all the internal parts
and assemblies removed Using an O-ring pick or similar
Figure 52
from the pump housing it tool, remove the seals from the
will now be easier to re- underside of both servo covers.
move the shaft seal. To (see Figure 58)
remove the seal, us a
large screwdriver or simi-
lar tool and drive the seal
from the housing. (see Figure 58
Figure 52)
Any further disassembly of the
To remove or replace the servo piston is neither necessary
Figure 53
front bearing race. You nor recommended. The servo
will either have to press or piston adjustment is a very
pull the bearing race from critical adjustment and should
the pump housing. (see not be tampered with. (see
Figure 53) Figure 59)
Figure 59

Reposition the pump Next, using an O-ring pick or

housing. Using a 1/2 in. similar tool remove the two servo
end wrench or socket, piston seals from the pump
remove the retaining cap housing. NOTE: Caution must be
screws from the servo used when removing these seals
piston cover. (see Figure so as not to scratch or damage
54) the servo piston bore. (see
Figure 54
Figure 60 Figure 60)

33
 Repair Information – Series 2 Variable Displacement Pump
Install the servo piston cover
Complete Reassembly on the servo piston adjustment
screw. Install about half way
Before reassembly, clean all parts and assemblies. Inspect and down the adjustment screw.
replace damaged parts and assemblies. When reworking parts, Next, install a new threaded
do not use course grit paper, files or grinders on finished sur- seal and special washer. Install
faces. Replace all gaskets and seals. the threaded seal first and then
Lubricate all seals with petroleum jelly (Vaseline) for retention Figure 65 the special washer. The bev-
during reassembly. Freely lubricate all bearings and finished sur- eled side of the special washer
faces with clean hydraulic fluid. must face the sealing washer.
(see Figure 65)
The front bearing cup is a
slip fit in the pump hous- Install the lock nut on the servo
ing. When replacement is piston adjustment screw. Do
necessary, simply slip it in not tighten this lock nut at this
the pump housing. (see time. Final servo piston adjust-
Figure 61) ment will take place later on
during reassembly. (see Figure
Figure 61 66)
Figure 66
Shown here are the seals
used to seal the servo pis-
ton to the pump hosing. Lubricate and install the servo
Two each, O-rings and piston assembly into the pump
back up rings. (see Figure housing. Install into the op-
62) posite side of the pump hous-
ing the speed sensor port is
Figure 62 located . The flat side of the
servo piston must also be per-
Figure 63 Lubricate and install the Figure 67 pendicular to, and facing, the
two new seals and back- center of the pump housing.
up rings into the servo pis- Install the four servo cover retaining cap screws. Torque cap screws
ton bore located in the to 16 ft. lbs. [21,7 Nm] to 17 ft. lbs. [23 Nm]. (see Figure 67)
pump housing. Install the
black sealing ring first and
then the blue back-up ring. Figure 68 Using a square, make sure the
Caution must be used not flat side of the servo piston is
to twist or kink these seals perpendicular to the pump
during installation. (see housing face. (see Figure 68)
Figure 63)

Lubricate and install new

seals on both the servo
piston covers. (see Figure
Install the remaining servo pis-
64)
ton cover and remaining four
servo cover retaining cap
screws. Torque cap screws to
16 ft. lbs. [21,7 Nm] to 17 ft.
Figure 64
lbs. [23 Nm]. (see Figure 69)

Figure 69

34
Repair Information – Series 2 Variable Displacement Pump
Lubricate and install the Figure 73 Lubricate and reassemble the
Figure 70 two bearing races into the rotating group. (see Figure 73)
pump housing. Install the
races on their locating
pins with the grooved side
of the races towards the
center of the pump hous-
ing. (see Figure 70)

The second step is to measure

Install the two clocking the combined thickness of both
Figure 71 links into the pump hous- the piston slippers and retainer
ing. Before installing, ap- as shown here. The difference
ply a small amount of pe- between step one and step two
troleum jelly on the pin is the fixed clearance. Again the
pivots. This will help to fixed clearance must not exceed
hold them in the up-right Figure 74 .008 inches. Whenever this
position when installing clearance exceeds .008 inches,
the swashplate assembly. the piston/slipper assemblies should be reevaluated. (see Figure 83)
Next lubricate and install the two bearings into the pump hous-
ing by aligning the hole in the side of the bearings with clock-
ing links. (see Figure 71) Position the swashplate on the
support base. Lubricate the
thrustplate and install it on the
Before installing the rotating group onto the swashplate, the swashplate. Install the two spac-
fixed clearance must be checked. This preset fixed clearance ers, strap, washers and retain-
is the clearance between the piston slipper face and thrust plate. ing screws. The two retaining
The formula for this clearance is: Dimension (A) minus Di- screws should remain loose at
mension (B) equals Dimension (C). Dimension (C) must not this time. IMPORTANT: The
Figure 75
exceed .008 inches. bronze side of the strap must
Max. Clearance ( C ) .008 face the swashplate. (see Fig-
ure 75)
A–B=C Piston

Retaining Cap Screw Figure 76 Carefully install the swashplate

Washer on the rotating group. (see Fig-
Retaining Strap
Slipper Retainer ure 76)
Plate
Bronze Side
Faces Swashplate

Spacer Piston Slipper

Swashplate

Thrust Plate

Carefully, retaining the

swashplate and the rotating
The first step in checking group together, install it back on
the fixed clearance is to the support base. Install the re-
measure the height of the maining two spacers. strap,
retaining strap spacer (di- washers and retaining screws.
mension A). This can be Figure 77 Unlike the Series 1 transmis-
done by using a microme- sions, these retaining screws DO
ter of dial vernier calipers NOT require Loctite. Torque all
Figure 72 as shown here. (see Fig- four retaining cap screws to 17 ft. lbs. [23 Nm] to 18 ft. lbs. [24,4
ure 72) Nm]. (see Figure 77)

35
 Repair Information – Series 2 Variable Displacement Pump
Figure 78 Lubricate and install the Figure 83VERY CAREFULLY pick up the
input shaft into the rotat- entire assembly and install it
ing group and swashplate into the pump housing. Install
assembly. (see Figure 78) by aligning the two notches lo-
cated in the swashplate with the
two clocking links and the
swashplate side with the notch
in the servo piston. IMPOR-
TANT: The swashplate assem-
bly must be firmly seated on the swashplate bearings. (see Figure
Figure 79 Lubricate and install the
83)
rear bearing on the shaft
and bearing assembly. Install the lower clocking link re-
Support the shaft assem- taining plug. Torque plugs to
bly in a slightly raised po- 125 ft. lbs. [169,5 Nm]. (see
sition. Next use a hydrau- Figure 84)
lic press to press the rear
bearing cone on the shaft.
The bearing cone must be
firmly seated against the machined shoulder of the pump shaft. Figure 84
NOTE: The bearing cone may also be heated for installation.
(see Figure 79) Remove the bearing puller and
Figure 85
two rubber bands from the
In preparation of install- swashplate assembly. (see Fig-
Figure 80
ing the swashplate and ure 85)
rotating group into the
pump housing it helps to
retain the two hold down
arms. To do this, install
two heavy rubber bands
across both arms. (see In preparation of zeroing in the
Figure 80) Figure 86
swashplate, first place a paral-
lel bars across the face of the
Lubricate and install the pump housing. Make sure
slide block on the these bars are resting firmly on
swashplate. Before in- the housing face. Next using a
stalling, apply a small depth micrometer, measure the
amount of petroleum jelly distance from the parallel bar to
to the back side of the the face of the swashplate.
slide. This will help to re- Make note of this dimension.
Figure 81 tain the slide block in po- (see Figure 86)
sition during assembly
into the pump housing. With the first dimension noted,
(see Figure 81) Figure 87
move the depth micrometer to
the opposite side of the swash-
Figure 82
To help in the assembly of plate and measure the distance
the swashplate and rotat- from the parallel bars to the face
ing group into the pump of the swashplate. Again make
housing, reinstall the note of this dimension. With the
bearing puller on the rear two dimensions noted, turn the
bearing. The bearing face of the depth micrometer so
puller can now be used as that the zero position is right in between the two noted dimensions.
a handle to assemble the swashplate, rotating group and shaft (see Figure 87)
assembly into the pump housing. (see Figure 82)

36
Repair Information – Series 2 Variable Displacement Pump
Figure 88 The next step in zeroing in Figure 93 Aligning the pump end cover
the swashplate is to use a with the hold down arm assem-
3/8 in. end wrench to turn bly alignment tool (2) dowels,
the servo piston adjust- install the end cover. (see Fig-
ment screw clockwise or ure 93)
counterclockwise to bring
the swashplate to the zero
position. NOTE Earlier
units used a screwdriver
slot to adjust the neutral position. (see Figure 88) After installation remove the four
dowel pins and carefully remove
The final step is to hold the alignment tool (2) using cau-
Figure 89 the servo adjustment tion as not to disturb the hous-
screw in the stationary ing gasket. (see Figure 94)
position. Use 3/4 in. end
wrench to tighten the
Figure 94
servo adjustment screw
lock nut, using caution not
to disturb the neutral or Figure 95
If you do not have the special
zero swashplate position. alignment tool (2), the swash
Torque the lock nut to 45 ft. lbs. [61 Nm]. (see Figure 89) plated hold-down ears and
springs still must be aligned
with the recesses machined into
Figure 90 After removing the depth the face of the end cover before
micrometer and parallel it can set squarely on the pump
bar, install the two hollow housing. This can be done by
dowel pins in the pump slightly elevating the end cover
housing and the two hold- and using a machinist ruler or similar tool to align the ears and springs
down springs and wash- with the recess. This must be done on both sides of the end cover.
ers on the swashplate (see Figure 95)
hold-down arms. (see
Figure 90)
Figure 96 Install four of the end cover re-
taining cap screws. Tighten cap
Figure 91 Next install the two hold screws. (see Figure 96)
down arm assembly
alignment tool and dow-
els. NOTE: This is a very
handy assembly tool,
please see the special tool
section located in the back
of this manual for the di-
mensions required to Figure 97 Reposition and support the
make this special tool. pump assembly on its end cover.
(see Figure 91) Use a hammer to gently tap the
Lubricate and install the input shaft inward. (see Figure
Figure 92 97)
rear bearing shims and
cup into the pump end
cover. To check the shaft
end play, the pump end
cover must be installed
without either the valve
or bearing plates. This
will help to remove the
cylinder barrel spring tension against the input shaft. (see Fig-
ure 92)
37
 Repair Information – Series 2 Variable Displacement Pump
Figure 98 Install a magnetic base in- Figure 103 Again, use the two hold down
dicator on the mounting arm assembly alignment tool
flange with the indicators and dowels on the pump hous-
gage probe on the input ing. The next step is to install
shaft. Next, using slip the charge pump assembly into
joint pliers, grip the input the pump end cover before in-
shaft as low as possible stalling the end cover on the
and pry upward to deter- pump housing. (see Figure 103)
mine shaft end play. The
indicator must read between .002 to .007 inch. To adjust shaft
The position of the charge pump
end play, either add or delete the shims located under the bear-
valve plate in the pump housing
ing cup located in the end cover. (see Figure 98)
determines charge pump input
rotation. Please not that one side
Figure 99 With the input shaft end of the kidney slots in the valve
play determined, remove plate is wider that the other. (see
the magnetic base indica- Figure 104)
tor. Reposition the pump Figure 104
assembly and remove the
end cover. Next lubricate
and install the pump hous- For pumps with clockwise input
ing sealing and back-up rotation, the wide side of the kid-
rings. (see Figure 99) ney slot must be on the (A) side
of the pump end cover. Please
note the (A) and (B) Stamped on
On units incorporating the the end cover, right next to the
pressure override option, high pressure ports. For coun-
special tapered sealing Figure 105 terclockwise input rotation, the
and back-up ring are used. wide side of the kidney slot must
Correct installation is with be on the (B) side of the pump
the sealing rings tapper end cover. (see Figure 105)
facing upward and with
Figure 100 the back-up rings tapper
facing downward. (see Like the valve plate, the eccen-
Figure 100) tric ring also determines charge
pump input rotation. Please note
that one side of the eccentric ring
Figure 101 Next lubricate and install is wider that the other. The wide
the pump housing sealing side of the eccentric ring also
and back-up rings. (see has a identification “dot ”. (see
Figure 101) Figure 106 Figure 106)

For pumps with clockwise input

Figure 107
rotation, the identification “dots”
must be in alignment or the wide
side of the eccentric ring must
Figure 102 Install the two dowel pins be on the (B) side of the pump
in the cylinder barrel as- end cover. For counterclockwise
sembly block face. Freely input rotation, the identification
lubricate the bearing plate “dots” must be misaligned or the
and aligning with the wide side of the eccentric ring
dowel pins, install it on the must be on the (A) side of the pump end cover. (see Figure 107)
cylinder barrel assembly.
(see Figure 102)

38
Repair Information – Series 2 Variable Displacement Pump
Figure 108 Lightly coat the charge Figure 113 Install the dowel pin in the end
pump drive key with pe- cover. Lightly coat the end cover
troleum jelly to help hold side of the valve plate with pe-
it in position during as- troleum Jelly (Vaseline) for re-
sembly. First install the tention during assembly. Install
drive key in its recess lo- the valve plate over the bearing
cated in the charge pump cup and aligning with the dowel
coupling. Next install the pin. (see Figure 113)
gerotor star on the charge
pump coupling by aligning with the previously installed drive
key Next install the charge pump coupling assembly and Figure 114 Aligning the pump end cover
gerotors outer ring into the pump end cover. (see Figure 108) with the hold down arm assem-
bly alignment tool (2) dowels,
install the end cover. (see Figure
Figure 109 Next lightly coat the 114)
charge pump sealing ring
with petroleum jelly and
install it into the pump end
cover. (See Figure 109)
Figure 115 You may have to rotate the
charge pump coupling slightly to
align the splines before the end
cover will set squarely on the
Before installing the pump housing. Again, if the
charge pump cover as- charge pump coupling does not
sembly, please note that have a through shaft, the pump
there is a small and large input shaft may have to be ro-
recess cast into the cover tated slightly to align the splines.
assembly. The large re- (see Figure 115)
cess side of the charge
Figure 110 pump cover must face to-
ward the charge pump in- Figure 116
With the charge pump coupling,
let. (see Figure 110) pump shaft splines aligned,
along with the swashplate hold
down ears and springs aligned
Figure 111
Aligning the large recess with the recess machined into
in the cover assembly with the face of the end cover, remove
the charge pump inlet, in- the four dowel pins and carefully
stall the charge pump remove the alignment tool (2)
cover over the coupling using caution as not to disturb
and into the pump end the housing gasket and sealing rings. (see Figure 116)
cover. Install the four re-
taining cap screws. (see
Figure 111) Figure 117 With the hold-down springs
aligned, install the end cover re-
taining cap screws. Torque cap
Using a “T” handle to ro- screw as follows:
tate the charge pump as- Model 39 to 46 • 35 ft. lbs. [47,4
sembly, torque the retain- Nm] to 40 ft. lbs. [54 Nm] Model
ing cap screws to 20 ft. 54 to 64 • 60 ft. lbs. [81,3 Nm]
lbs. [27, Nm] to 24 ft. lbs. to 65 ft. lbs. [88,1 Nm]
[32,5 Nm] Note: If the (see Figure 117)
charge pump assembly
Figure 112 does not have a through
shaft, the charge pump
assembly must be rotated from the other side. (see Figure 112)

39
 Repair Information – Series 2 Variable Displacement Pump
Lubricate and install the Next, install the high pressure
seal ring on the auxiliary valves or check valve assem-
pump mounting flange. blies. Torque to 120 ft. lbs.
(see Figure 118) [162,7 Nm] to 130 ft. lbs. [176,2
Nm] (see Figure 23)

Figure 118 Figure 123

Figure 119
Aligning the retaining cap
screw holes, install the Install the charge pressure re-
auxiliary pump mounting lief valve poppet or optional re-
flange on the pump end lief valve cartridge into the
cover. Install the retain- pump housing. (see Figure 124)
ing cap screws. Torque
cap screws to 20 ft. lbs.
[27,1 Nm] to 24 ft. lbs.
[32,5 Nm]. (see Figure Figure 124
119)
Next install the valve plug,
Using a small deep wall shims, and valve spring. NOTE:
socket or similar tool, lu- Because of heavy valve spring
bricate and install the in- tension, you must both push
ternal pressure override and turn to start the charge
valve poppet into the pressure plug. (see Figure 125)
pump housing. NOTE: It
works best to install the Figure 125

Figure 120 poppet vertically into the

pump housing. (see Fig-
ure 120) Torque plug to 120 ft. lbs.
[162,7 Nm] to 130 ft. lbs. [176,2
Nm]. (see Figure 126)
Next, install the valve
plug, shims, and valve
spring end. NOTE: Again
it works best in install
these parts vertically into
Figure 126
the pump housing. In
doing it vertically, there
Figure 121 will be less chance of the Install the clocking link plug.
Figure 127
parts falling out of posi- Torque plug to 125 ft. lbs.
tion. (see Figure 121) [169,5 Nm]. (see Figure 127)

Torque plug to 100 ft. lbs.

[135,6 NM] to 105 ft. lbs.
[142,3 Nm]. (see Figure
122)

Figure 122

40
Repair Information – Series 2 Variable Displacement Pump
Lubricate and install the Next, install the spacer
control feedback assem- washer on top of the seal.
bly on the swashplate as- When severe wear in the
sembly. (see Figure 128) seal area of the pump shaft
is noted, you may want to
add an additional spacer
Figure 128 washer to relocate the seal
Figure 133 to a different location. A
maximum of two spacer
may be used. (see Figure
Next, aligning with the re-
133)
Figure 129 taining cap screws holes,
install the control valve
gasket on the pump hous- Using internal retaining ring
Figure 134
ing. (see Figure 129) pliers, install the retaining
ring into the pump housing
( see Figure 134)

Aligning the control valve

assembly with the feed-
back link, install the con-
trol valve assembly on the Again using a seal driver or
pump housing. Next, in- similar tool as shown here,
stall the control valve as- tap the retaining ring inward
sembly retaining cap until it snaps firmly in its
Figure 130 screws. Torque cap groove. (see Figure 135)
screws to 20 ft. lbs. [27,1
Nm] to 24 ft. lbs. [32,5
Nm] (see Figure 130) Figure 135

Figure 131 Protecting the shaft seal

with a seal bullet or simi- The Series 2 Variable Dis-
lar tool, install the seal placement Pump is now
into the pump housing. ready for test and installa-
Install the seal with the lip tion. (see Figure 136)
of the seal facing inward.
(see Figure 131)

Figure 136

Figure 132 Using a seal driver or

similar drive the seal into
the pump housing. Drive
the seal in just far enough
to install the spacer
washer and retaining ring.
(see Figure 132)

Figure 129

41
Troubleshooting – Series 2 Variable Displacement Pump
This section provides the information necessary to troubleshoot a typical hydrostatic system using an Eaton
Series 2 hydrostatic pump. Using this section will help you to diagnose any minor problems that may occur.
Maintaining cleanliness while you work will prevent contamination of the hydrostatic system and insure con-
tinuous and satisfactory transmission life.

Manual Displacement Control

Electronic Solenoid Operated Control

With Electronic Feedback
Proportional
Solenoids (2)

A
B
C

Potentiometer

43
 Troubleshooting – Series 2 Displacement Variable Pump
Manual Control
Valve and Test Port Locations
Check Valve or
Valve
Optional Port A
High Pressure
Relief Valve

System Pressure
Test Port For
Port A

Charge Pressure
Test Port

System Pressure
Test Port For
Port B

Check Valve or
Optional Port B
Charge Pressure High Pressure
Relief Valve Relief Valve

A
Optional
Speed
Sensor
(Not Shown)

Charge Pump

44
Troubleshooting – Series 2 Variable Displacement Pump

Gauge Requirements, Gauge Port Size and Locations

System Pressure Gauges ( 2 )
0 - 10,000 PSI [ 0 - 610 bar ]
Inlet Vacuum Gauge
- 30 to + 30 inHg (Mercury)
[ -1 to + 2 bar ] Charge Pressure Gauge
( Compound Gauge ) 0 - 600 PSI [ 0 - 37 bar ]

0 5000 5000
5 300
4000 6000 4000 6000
10 10 200 400
3000 7000 3000 7000
15

20 20 2000 8000 100 500 2000 8000

Compound
30 30
25
1000 PSI 9000
0
PSI 600
1000 PSI 9000
Vac Press 10000
0 0 10000

Inlet Vaccum
1-5/16 - 12 UN 2B
-16 SAE O-Ring Port
Customer Must
Supply Tee Fitting
( Not Shown )

Charge Pressure Gage Port

7/8 14 UNF 2B - 10 O-Ring Port

Optional System Gage Ports (2)

9/16 18 UNF 2B - 6 O-Ring Ports

45
 Troubleshooting – Series 2 Variable Displacement Pump

Pressure Readings
The pressures given in this manual are gauge pressures or delta pressures.
A pressure gauge reads zero when connected to atmospheric pressure.
Any reading above or below this zero point is referred to as gauge pressure (PSI).
Delta pressure is the difference of two gauge pressures in a hydraulic circuit.
For example:
Charge pressure reading of 340 PSI [ 23,4 bar ]
Minus Case pressure reading of 20 PSI [ 1,5 bar ]
Equals Differential pressure of 360 D PSI [ 23,4 bar ]
Typical hydrostatic circuits usually include inlet pressure, case pressure, low
or charge pressure and system or high pressure. These pressures will vary
per each individual application and operating conditions.
Nominal Operating Pressures
(At Normal Operating Temperature)
Inlet Vacuum: Should not exceed 10 in. Hg. [ 254 mm Hg ]
(inches of mercury) for an extended period of time

Case pressure: Should not exceed 40 PSI [ 2,8 bar ]

for an extended period of time

Charge Pressure:* Neutral 340 PSI [ 23,4 bar ]

Forward or Reverse 280 PSI [19,3 bar ]
*Charge Pressure Relief valves are factory preset to their nominal setting with a
2 GPM [ 7,6 l/min ] flow rate. The original valve pressure will increase approximately
3 PSI [ ,21 bar ] per 1 GPM [ 3,8 l/min ] additional flow over the valve.
The charge pressures given above are typical. Higher charge pressures may be
set at the factory for your particular application.

46
Troubleshooting – Series 2 Variable Displacement Pump

Fault-Logic Trouble Shooting

This Fault-Logic Trouble Shooting Guide

Explanatory Diagram
is designed as a diagnostic aid in locating
possible transmission problems by the user.
Match the transmission symptoms with the Symptom:
problem statements and follow the action Action
steps shown in the box diagrams. This will Step
Inspect
give expedient aid in correcting minor Comment Ok
problems, eliminating unnecessary machine Number 1 ?
down time.
Following the fault-logic diagrams are Decision Defective
diagram action comments to further help
explain the action steps shown in the Repair
diagrams. Solution or
Replace
Where applicable, the action comment
number of the statement appears in the
action block of the diagram.

Neutral Difficult or Impossible to Find

Inspect External Inspect Inspect
Pump Control Ok Pump Control Ok Servo Piston Ok Replace Pump
1 Linkage (if Used) 2 Valve 3 Adjustment

Defective Defective Misadjusted

Repair Repair
or or Re-Adjust
Replace Replace

47
48

Troubleshooting – Series 2 Variable Displacement Pump

Transmission Operates in One Direction Only
Inspect External Inspect Inspect
Pump Control Ok Pump Control OK System Relief
1 Linkage (if Used) 2 Valve 4 Valves

Defective Defective Defective

Repair Repair Repair

or or or Ok
Replace Replace Replace

Replace Inspect Inspect

Pump Ok Charge Ok Shuttle
Check Valves 6 Valve 5

Defective Defective

Repair Repair
or or
Replace Replace
 Troubleshooting – Series 2 Variable Displacement Pump
System Operating Hot
Check Oil Inspect Inspect Heat Check
Level in Ok Heat Ok Exchanger By-Pass Ok Charge
7 Reservoir 8 Exchanger 9 Valve (if Used) Pressure

Below Level Clogged Defective

Fill to Repair Low in Low in

Proper Clean or Neutral,Forward Forward
Level Replace or or
Reverse Reverse

Ok
Inspect Inspect Inspect Charge Inspect Charge
Charge Ok Inlet Ok Relief Valve Relief Valve
Pump 15 Filter 11 (At Pump) 13 (At Motor) 14

Defective Clogged Defective Defective

Repair Repair Repair

Ok or Replace or or
Replace Replace Replace

Replace Inspect Motor Inspect Inspect

Transmission Ok By-Pass Valve Ok IPOR Valve Ok System Relief
(Pump & Motor) (if Used) 10 (if Used) 16 Valves 4

Defective Defective Defective

Repair Repair Repair

or or or
Replace Replace Replace
49
50

Troubleshooting – Series 2 Variable Displacement Pump

System Response Sluggish
Check Inspect Inspect System Replace
Charge Ok Pump Control Ok By-Pass Valve Ok Transmission
Pressure 2 Valve 10 (if Used) (Pump & Motor)

Defective Defective

Repair Repair
or or
Replace Replace

Ok

Low Low in Low in

In Forward Neutral,Forward
Neutral or or
Reverse Reverse

Inspect Charge Inspect Charge Inspect Charge Inspect Inspect

Relief Valve Relief Valve Relief Valve Ok Inlet Ok Charge
13 (At Pump) 14 (At Motor) 13 (At Pump) 11 Filter 15 Pump

Defective Defective Defective Clogged Defective

Repair Repair Repair Repair

or or or Replace or
Replace Replace Replace Replace
 Troubleshooting – Series 2 Variable Displacement Pump
System Will Not Operate in Either Direction
Check Oil Inspect External Inspect Motor Check
Level in Ok Pump Control Ok By-Pass Valve Ok Charge
7 Reservoir 1 Linkage (if Used) 10 (if Used) Pressure

Below Level Defective Defective

Fill to Repair Repair Low in Low in

Proper or or Neutral,Forward Forward
Level Replace Replace or or
Reverse Reverse

Ok
Inspect Inspect Inspect Charge Inspect Charge
Charge Ok Inlet Ok Relief Valve Relief Valve
Pump 15 Filter 11 (At Pump) 13 (At Motor) 14

Defective Clogged Defective Defective

Repair Repair Repair

Ok or Replace or or
Replace Replace Replace

Replace Inspect Inspect Inspect

Transmission Ok Pump Control Ok IPOR Valve Ok System Relief
(Pump & Motor) Valve 2 (if Used) 16 Valves 4

Defective Defective Defective

Repair Repair Repair

or or or
51

Replace Replace Replace

 Troubleshooting – Series 2 Variable Displacement Pump
1. Inspect External Pump Control G. Defective Potentiometer
Linkage for: H. Misadjusted speed sensor (on
Manual Operated Controls motor when used)
A. Misadjusted or disconnected I. Defective speed sensor
B. Binding, bend or broken J. Defective electronics module
Hydraulic Remote Controls
A. Improper pilot pressure 3. Inspect Servo Piston for:
B. Defective proportional valve A. Improper servo piston adjustment
(see proportional valve manual)
Electrical Operated Controls 4. Inspect System Relief Valves for:
A. Disconnected electric signal A. Improper pressure relief setting
connection (consult owners/operator manual
for system relief valve settings)
B. Valve poppet held off seat
2. Inspect Pump Control Valve for:
C. Broken valve springs (2)
Manual Operated Controls
D. Broken valve stem
A. Plugged control orfice
B. Damaged mounting gasket
5. Inspect Shuttle Valve for:
C. Misadjusted, damaged or broken
neutral return spring A. Bent or broken return centering
spring
D. Broken control connector pin
B. Worn or stuck shuttle spool
E. Broken or missing control linkage
pin(s) C. Bent or broken shuttle spool
F. Worn, struck or bent control
spool 6. Inspect Charge Check Valves for:
A. Valve held off seat
Hydraulic Remote Controls B. Broken valve spring
A. Plugged control orfice
B. Damaged mounting gasket 7. Check Oil Level in Reservoir:
C. Misadjusted, damaged or broken A. Consult owner/operators manual for
neutral return spring the proper type fluid and level
D. Broken control connector pin
E. Broken or missing control linkage 8. Inspect Heat Exchanger for:
pin(s) A. Obstructed air flow (air cooled)
F. Worn, struck or bent control B. Obstructed water flow (water
spool cooled)
G. Worn, or stuck hydraulic control C. Improper plumbing (inlet to outlet)
pistons
D. Obstructed or insufficient fluid flow
E. Cooling fan failure (if used)
Electrical Operated Controls
A. Plugged control orfice
9. Inspect Heat Exchanger By-Pass Valve for:
B. Damaged mounting gasket
A. Improper pressure setting
C. Worn, stuck or bent control spool
D. Stuck solenoid valve(s) B. Stuck or broken valve
E. Defective solenoid coil(s)
F. Misadjusted Potentiometer

52
Hydraulic Fluid Recommendations
Introduction Fluid Maintenance
The ability of Eaton hydrostatic components to provide Maintaining correct fluid viscosity and cleanliness level is
the desired performance and life expectancy depends essential for all hydrostatic systems. Since Eaton hydro-
largely on the fluid used. The purpose of this document static components are used in a wide variety of applica-
is to provide readers with the knowledge required to tions it is impossible for Eaton to publish a fluid mainte-
select the appropriate fluids for use in systems that nance schedule that would cover every situation. Field
employ Eaton hydrostatic components. testing and monitoring are the only ways to get accurate
measurements of system cleanliness. OEM’s and dis-
One of the most important characteristics to consider
tributors who use Eaton hydrostatic components should
when choosing a fluid to be used in a hydraulic system is
test and establish fluid maintenance schedules for their
viscosity. Viscosity choice is always a compromise; the
products. These maintenance schedules should be
fluid must be thin enough to flow easily but thick enough
designed to meet the viscosity and cleanliness require-
to seal and maintain a lubricating film between bearing
ments laid out in this document.
and sealing surfaces. Viscosity requirements for Eaton’s
Heavy Duty Hydrostatic product line are specified later in Fluid Selection
this document. Premium grade petroleum based hydraulic fluids will
provide the best performance in Eaton hydrostatic
Viscosity and Temperature
components. These fluids typically contain additives that
Fluid temperature affects viscosity. In general, as the
are beneficial to hydrostatic systems. Eaton recommends
fluid warms it gets thinner and its viscosity decreases.
fluids that contain anti-wear agents, rust inhibitors, anti-
The opposite is true when fluid cools. When choosing a
foaming agents, and oxidation inhibitors. Premium grade
fluid, it is important to consider the start-up and operating
petroleum based hydraulic fluids carry an ISO VG rating.
temperatures of the hydrostatic system . Generally, the
fluid is thick when the hydraulic system is started. With SAE grade crankcase oils may be used in systems that
movement, the fluid warms to a point where the cooling employ Eaton hydrostatic components, but it should be
system begins to operate. From then on, the fluid is noted that these oils may not contain all of the recom-
maintained at the temperature for which the hydrostatic mended additives. This means using crankcase oils may
system was designed. In actual applications this se- increase fluid maintenance requirements.
quence varies; hydrostatic systems are used in many
Hydraulic fluids that contain V.I. (viscosity index) improv-
environments from very cold to very hot. Cooling sys-
ers, sometimes called multi-viscosity oils, may be used in
tems also vary from very elaborate to very simple, so
systems that employ Eaton hydrostatic components.
ambient temperature may affect operating temperature.
These V.I. improved fluids are known to “shear-down”
Equipment manufacturers who use Eaton hydrostatic
with use. This means that their actual viscosity drops
components in their products should anticipate tempera-
below the rated value. Fluid maintenance must be
ture in their designs and make the appropriate fluid
increased if V.I. improved fluids are used. Automotive
recommendations to their customers.
automatic transmission fluids contain V.I. improvers.
Cleanliness
Synthetic fluids may be used in Eaton hydrostatic compo-
Cleanliness of the fluid in a hydrostatic system is ex-
nents. A reputable fluid supplier can provide information
tremely important. Eaton recommends that the fluid used
on synthetic fluids. Review applications that require the
in its hydrostatic components be maintained at ISO
use of synthetic fluids with your Eaton representative.
Cleanliness Code 18/13 per SAE J1165. This code allows
a maximum of 2500 particles per milliliter greater than 5
µm and a maximum of 80 particles per milliliter greater
than 15 µm. When components with different cleanliness
requirements are used in the same system, the cleanest
standard should be applied. OEM’s and distributors who
use Eaton hydrostatic components in their products
should provide for these requirements in their designs. A
reputable filter supplier can supply filter information.

53
 Hydraulic Fluid Recommendations (Cont.)
Viscosity and Cleanliness Guidelines
ISO
Optimum Cleanliness
Product Line Minimum Range Maximum Requirements Comments
Heavy Duty Piston 10cSt 16 - 39 cSt 2158 cSt 18/13
Pumps and Motors [60 SUS] [80 - 180 SUS] [10,000 SUS]

Additional Notes:
• Fluids too thick to flow in cold weather start-ups will cause • If the fluid becomes milky, water contamination may be a
pump cavitation and possible damage. Motor cavitation is problem.
not a problem during cold start-ups. Thick oil can cause
high case pressures which in turn cause shaft seal prob- • Take fluid level reading when the system is cold.
lems. • Contact your Eaton representative if you have specific
• If the natural color of the fluid has become black it is questions about the fluid requirements of Eaton hydrostatic
possible that an overheating problem exists. components.

Biodegradable Oil (Vegetable) Guidelines

Product Line Rating With Biodegradable Oil Comments
Heavy Duty Piston 80% of normal pressure rating listed for mineral 82° C (180° F) max fluid temp (unit)
Pumps and Motors oils. 71° C (160° F) max fluid temp (reservoir)

Additional Notes:
• Viscosity and ISO cleanliness requirements must be converted from mineral oil to vegetable oil should be
maintained as outlined on page 14. repeatedly flushed with vegetable oil to ensure 100%
biodegradability.
• Based on limited product testing to date, no reduction in
unit life is expected when operating at the pressure ratings • Specific vegetable oil products may provide normal unit
indicated above. life when operating at pressure ratings higher than those
indicated above.
• Vegetable oil is miscible with mineral oil. However, only the
vegetable oil content is biodegradable. Systems being

54
Special Tools – Series 2 Variable Displacement Pump
4.75

.040 X 45¡
BOTH ENDS FOUR REQ'D.
1.500 MAT'L: DRILL ROD
.060 X 45¡

1.013–.005
.250 .307–.001
.785–.005 .519
.211–.005
.25R

1.731 –.005

2.231

3.731 3.462–.001
6.000
3.641–.005

.25R

.437–.005 R
1.247–.005
MAT'L 1.875 4.25 Break all Sharp
HIGH CARBON STEEL .125 Corners and Edges
HDB & TEMPER
48-52 Rc
.312 –.002 ' THRU 1.50 .50
2 PLACES

.25R

.437–.005 R

.125 R

6.000
2.50
2.560–.005 R .50 R
4 PLACES
Series 2 Pump
.38 R
End Cover Tool
1.00 Models 33-46
.25R
Hold Down Arm
.063 R +.015 Unit Assembly Guide
.063 -.000
2 PLACES
2 PLACES
FH00-1754

55
Special Tools – Series 2 Variable Displacement Pump

Main Shaft Bearing

Stop Limit Tool Model
33,39,46 54,64
It is recommended that replacement
shafts be purchased as an assembly A
6.113 6.692
with the bearing already pressed ± .001
into place. In the event a bearing is
replaced in the field it must be B
1.31 1.37
pressed into place to the following A ± .030
dimensions, in order prevent
damage to the pump. C
2.18 2.32
C Dia. ± .030
D Dia.
D 3.00 min. 3.00 min.
Material – Steel

2.50
B
Dia.

( All dimensions are given in inches.)

5.00
6.00 Dia.

Low Clearance Bearing Puller

Model A B C D E

33,39,46 2.36/2.38 1.55/1.57 4.26/4.24 2.99\3.01 1.49/1.51

54,64 2.55/2.57 1.64/1.66 4.46/4.43 3.18/3.21 1.59/1.61

.375 O Dowel Pin (2) Places

Press Fit First Half
Light Slip Fit Opposite Half
.052
.072 .021 F
.041
Dim. C
Dim. D
B .510
.490 Dim. E .302
.322
1.101
A .99

.240
.260
.125 Material: 4340 Steel
.094 R. Heat Treat: 45-55 Rc

57
Model Code – Series 2 Variable Displacement Pump
The following 31-digit coding system has been developed to identify all of the configuration options for the
Series 2 hydrostatic pump. Use this model code to specify a pump with the desired features. All 31-digits of
the code must be present when ordering. You may want to photocopy the matrix below to ensure that each
number is entered in the correct box.

Model Code—Heavy Duty Series 2 Pump

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
A C L 0 A

Position 1, 2, 3 Product Series Position 14 and 15 Press Override (POR) Setting Ports A & B
ACL .............. Hydrostatic-Heavy Duty Variable Pump (Series II) NOTE: You must choose pressure override
Position 4, 5, 6 Displacement settings for both ports A and B. The pressure
054 .............. 54 cm3/r [3.3 in3/r] override setting should be 35 bar less than the
064 .............. 64 cm3/r [3.9 in3/r] high pressure relief valve.
075 .............. 75 cm3/r [4.6 in3/r] 0 .................. None
089 .............. 89 cm3/r [5.4 in3/r] A .................. Pressure Transducer (No pressure override valve)
105 .............. 105 cm3/r [6.4 in3/r] B .................. 205 bar [3000 lbf/in2]
Position 7, 8 Input Shaft † C .................. 240 bar [3500 lbf/in2]
14 ................ 14 Tooth 12/24 Pitch Spline D .................. 275 bar [4000 lbf/in2]
21 ................ 21 Tooth 16/32 Pitch Spline E .................. 310 bar [4500 lbf/in2]
23 ................ 23 Tooth 16/32 Pitch Spline F .................. 345 bar [5000 lbf/in2]
† Ask your Eaton representative for additional shaft options G .................. 380 bar [5500 lbf/in2]
Position 9 Input Rotation M ................. 395 bar [5725 lbf/in2]
L .................. Counterclockwise (Lefthand) H .................. 415 bar [6000 lbf/in2]
R .................. Clockwise (Righthand)
Position 10 Valve Plate Position 16,17 Special Pump Features
0 .................. V-groove 00 ................ No Special Features
1 .................. Propel 01 ................ Plugged Magnetic Speed Sensor Port
Position 11 Main Ports (Includes Gage Ports) 02 ................ Magnetic Speed Sensor
A .................. 25,4 [1.00] - Code 61 Per SAE J518 03 ................ Adjustable Servo Stop (one direction)
B .................. 25,4 [1.00] - Code 62 Per SAE J518 Position 18,19 Control
C .................. 25,4 [1.00] - Code 61 with M10 X 1 Threaded EB ................ CAN Multiplex Electronic Control
Holes EE ................ Electronic Proportional Control 12 Vdc and
D .................. 25,4 [1.00] - Code 62 with M12 X 1.75 Threaded Electronic Driver with 1 to 5 Vdc Potentiometric
Holes Command Input
EF ................ Electronic Proportional Control 24 Vdc and
Electronic Driver with 1 to 5 Vdc Potentiometric
NOTE: You must choose relief valve settings for
Command Input
both ports A & B
EG ................ Electronic Proportional Control 12 Vdc and
0 None Electronic Driver with 4 to 20 mA Command Input
B .................. 205 bar [3000 lbf/in2] EH ................ Electronic Proportional Control 24 Vdc and
C .................. 240 bar [3500 lbf/in2] Electronic Driver with 4 to 20 mA Command Input
D .................. 275 bar [4000 lbf/in2] EJ ................ Electronic Proportional Control 12 Vdc and
E .................. 310 bar [4500 lbf/in2] Electronic Driver with +/- 5 Vdc Differential
F .................. 345 bar [5000 lbf/in2] Command Input
G .................. 380 bar [5500 lbf/in2] EK ................ Electronic Proportional Control 24 Vdc and
Electronic Driver with +/- 5 Vdc Differential
H .................. 415 bar [6000 lbf/in2]
Command Input
L .................. 430 bar [6250 lbf/in2]

58
EL ................ Electronic Proportional Control 12 Vdc and Position 25 Auxiliary Mounting
Electronic Driver with +/- 100 mA Command 0 .................. None, High Speed Charge Pump (Models 54 to 75
Input cm3/rev)
EM ............... Electronic Proportional Control 24 Vdc and 1 .................. None, High Torque Charge Pump (Models 54 to 105
Electronic Driver with +/- 100 mA Command cm3/rev)
Input A .................. A-pad, High Speed Charge Pump, Dual 2 Bolt
HA ............... Hydraulic Remote Control with 5-15 bar control Mount, No Shaft Seal, 9 Tooth 16/32 Pitch Spline
range (Available For 54-75 cm3/rev Only)
MA ............... Manual Displacement Control B .................. B-pad, High Speed Charge Pump, Dual 2 Bolt
MB ............... Manual Displacement Control (up to 24 Vdc) Mount, No Shaft Seal, 13 Tooth 16/32 Pitch Spline
Normally Closed Neutral Lockout (Available For 54-75 cm3/rev Only)
MC ............... Manual Displacement Control with Neutral Detent C .................. A-pad, High Torque Charge Pump, Dual 2 Bolt
ML ............... Manual Displacement Control w/Wide Band Mount, No Shaft Seal, 9 Tooth 16/32 Pitch Spline
Neutral. (Available For All Models)
Position 20* Control Orifice Supply (P) D .................. B-pad, High Torque Charge Pump, Dual 2 Bolt
Position 21* Control Orifice Servo (S 1) Mount, No Shaft Seal, 13 Tooth 16/32 Pitch Spline
(Available For All Models)
Position 22* Control Orifice Servo (S 2)
E .................. B-B-pad, High Torque Charge Pump, Dual 2 Bolt
0 .................. None
Mount, No Shaft Seal, 15 Tooth 16/32 Pitch Spline
A .................. 0,53 [.021] Diameter (Available For All Models)
B .................. 0,71 [.028] Diameter F .................. C-pad, High Torque Charge Pump, 4 Bolt Mount, No
C .................. 0,91 [.036] Diameter Shaft Seal, 14 Tooth 12/24 Pitch Spline (Available
D .................. 1,12 [.044] Diameter For All Models)
E .................. 1,22 [.048] Diameter Position 26 Charge Pump Options
F .................. 1,32 [.052] Diameter 0 .................. None
G .................. 1,45 [.057] Diameter A .................. Remote Pressure Side Filter Ports
H .................. 1,65 [.065] Diameter Position 27 Charge Pressure Relief Valve Setting
J .................. 1,85 [.073] Diameter 0 .................. None
K .................. 2,06 [.081] Diameter A .................. 21 bar [304.5 lbf/in2] - Standard
L .................. 2,39 [.094] Diameter B .................. 22,5 bar [326.3 lbf/in2]
M ................. 2,59 [.102] Diameter C .................. 24 bar [348 lbf/in2]
* Eaton recommends you chose an orifice for control orifice D .................. 25,5 bar [369.8 lbf/in2]
supply (P). The servo orifice (S1) and the servo orifice (S2) E .................. 27 bar [391.5 lbf/in2]
are optional, except when specifying a pressure override. F .................. 28,5 bar [413.3 lbf/in2]
Position 23 Control Special Features G .................. 30 bar [435 lbf/in2]
0 .................. No Control Special Features Position 28 Charge Pump Special Features
3 .................. Destroke valve 0 .................. No Charge Pump Special Features
Position 24 Charge Pump Displacement Position 29 Paint and Packaging
0 .................. None 0 .................. Painted Primer Blue (Standard)
1 .................. 13,9 cm3/r [0.85 in3/r] (Pump Disp. 54-89 cm3/rev) Position 30 Identification On Unit
2 .................. 17,4 cm3/r [1.06 in3/r] (Pump Disp. 54-105 cm3/rev 0 .................. Standard
Std for 105)
Position 31 Design Code
3 .................. 21,0 cm3/r [1.28 in3/r] (Pump Disp. 54-105 cm3/rev)
A .................. A
4 .................. 27,9 cm3/r [1.70 in3/r] (Pump Disp. 54-105 cm3/rev)
5 .................. 34,7 cm3/r [2.12 in3/r] (Pump Disp. 89-105 cm3/rev)

59
 ACCREDITED BY
THE DUTCH COUNCIL
FOR CERTIFICATION
Reg. No. 24

Eaton Corporation Eaton Ltd. Eaton GmbH ISO-9001 CERTIFICATED FIRM

DET NORSKE VERITAS INDUSTRY BV, THE NETHERLANDS

Hydraulics Division Hydraulics Division Hydraulics Products

Quality System Certified
15151 Hwy. 5 Glenrothes, Fife Am Schimmersfeld 7 Products in this catalog are manufactured
Eden Prairie, MN 55344 Scotland, KY7 4NW 40880 Ratingen, Germany in an ISO-9001-certified site.
Telephone 612/937-9800 Telephone 01-592-771-771 Telephone 02102-406-830
Fax 612/937-7130 Fax 01-592-773-184 Fax 02102-406-800
www.eaton.com
Copyright Eaton Corporation, 1997
Form No. 6-636 All Rights Reserved
Printed in USA

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