The document provides instructions for disassembling and assembling the piston pump used in the steering system of a Caterpillar 966H wheel loader. It describes 27 steps to disassemble the pump by removing components like bolts, valves, springs, and bearings. It then describes 34 steps for reassembling the pump, noting that cleanliness is important and cautioning that parts are spring loaded and can cause injury if not assembled properly. Dimensions like torque specifications and axial shaft end play are also provided to ensure correct assembly.
Things to remember while upgrading the brakes of your carjennifermiller8137
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2. Shutdown SIS
Previous Screen
Product: WHEEL LOADER
Model: 966H WHEEL LOADER A6D
Configuration: 966H Wheel Loader A6D00001-UP (MACHINE) POWERED BY C11 Engine
Disassembly and Assembly
966H and 972H Wheel Loaders Machine Systems
Media Number -RENR8859-07 Publication Date -01/03/2014 Date Updated -14/12/2016
i02288172
Piston Pump (Steering) - Disassemble
SMCS - 4306-015; 5070-015-ZH
Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1P-4878 Plate(1)
1
B 1P-1861 Retaining Ring Pliers 1
(1)
33.3 mm (1.31 inch) diameter
Start By:
a. Remove the steering pump. Refer to Disassembly and Assembly, "Piston Pump (Steering) -
Remove".
Illustration 1 g01145338
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3. 1. Remove bolts (1) and valve (2).
Illustration 2 g01145339
2. Remove O-ring seals (3) from valve (2).
Illustration 3 g01145340
Personal injury can result from being struck by parts propelled by a
released spring force.
Make sure to wear all necessary protective equipment.
Follow the recommended procedure and use all recommended tooling to
release the spring force.
3. Remove plug (4), the O-ring seals, plug (5), and plug (6).
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5. Illustration 4 g01145341
4. Remove spool (7) and spool (8).
5. Remove the O-ring seals from plug (5) and plug (6).
Illustration 5 g01145342
Personal injury can result from being struck by parts propelled by a
released spring force.
Make sure to wear all necessary protective equipment.
Follow the recommended procedure and use all recommended tooling to
release the spring force.
6. Remove adjustment screw (9) and adjustment screw (10).
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6. Illustration 6 g01145354
7. Remove retainer (14), spacer (13), spring (12), and retainer (11).
8. Remove retainer (17), spring (16), and retainer (15).
9. Remove the O-ring seals from adjustment screw (9) and adjustment screw (10).
Illustration 7 g01145355
10. Remove bolts (18) and elbow (19).
Illustration 8 g01145356
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7. Personal injury can result from being struck by parts propelled by a
released spring force.
Make sure to wear all necessary protective equipment.
Follow the recommended procedure and use all recommended tooling to
release the spring force.
11. Remove bolts (20) and head (21).
Illustration 9 g01145522
12. Remove plate (22).
Illustration 10 g01145523
13. Remove bearing cup (23) and pin (24).
Note: Place the steering pump on suitable blocks, as shown.
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8. Illustration 11 g01145357
14. Remove bearing cone (26) and gasket (9).
Illustration 12 g01145358
15. Remove spacer (28) and barrel assembly (29).
16. Remove spring (27) and piston (30).
Illustration 13 g01145359
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9. Illustration 14 g01145360
Personal injury can result from being struck by parts propelled by a
released spring force.
Make sure to wear all necessary protective equipment.
Follow the recommended procedure and use all recommended tooling to
release the spring force.
17. Use Tooling (A) and a suitable press to disassemble barrel assembly (29).
a. Compress spring (31) until Tooling (A) is below retaining ring (33).
b. Remove retaining ring (33) and slowly release the spring tension.
c. Remove spring (31) and washers (32).
Illustration 15 g01145361
18. Remove bolts (34) and cover (35).
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10. 19. Remove plug (36).
Illustration 16 g01145362
20. Remove O-ring seal (38) from the cover. Remove O-ring seal (39) from the plug.
21. Remove shaft (37).
Illustration 17 g01145365
22. Remove bolts (40) and two spacer plates (41).
23. Remove pistons (42) and the plate.
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11. Illustration 18 g01145366
24. Remove spacer plates (43) and swashplate (44).
Illustration 19 g01145367
25. Remove bearing cone (45).
Illustration 20 g01145368
26. Use Tooling (B) in order to remove retaining ring (46) and seal (47).
Illustration 21 g01145369
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12. 27. Remove bearing cup (48).
28. Remove screws (50). Remove bearings (49) and (51).
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Wed Mar 18 12:08:35 UTC+0800 2020
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13. Shutdown SIS
Previous Screen
Product: WHEEL LOADER
Model: 966H WHEEL LOADER A6D
Configuration: 966H Wheel Loader A6D00001-UP (MACHINE) POWERED BY C11 Engine
Disassembly and Assembly
966H and 972H Wheel Loaders Machine Systems
Media Number -RENR8859-07 Publication Date -01/03/2014 Date Updated -14/12/2016
i02288174
Piston Pump (Steering) - Assemble
SMCS - 4306-016; 5070-016-ZH
Assembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1P-4878 Plate(1)
1
B 1P-1861 Retaining Ring Pliers 1
(1)
33.3 mm (1.31 inch) diameter
Illustration 1 g01145369
1. Lower the temperature of bearing cup (48).
2. Install bearing cup (48).
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14. 3. Install bearings (49) and (51).
4. Install screws (50).
Illustration 2 g01145368
5. Install seal (47).
6. Use Tooling (B) in order to install retaining ring (46).
Illustration 3 g01145367
7. Install bearing cone (45).
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15. Illustration 4 g01145366
8. Install swashplate (44) and spacer plates (43).
Illustration 5 g01145365
9. Install pistons (42) and the plate.
10. Install bolts (40) and spacer plates (41).
Illustration 6 g01145362
11. Install O-ring seal (38) onto the cover. Install O-ring seal (39) onto the plug.
12. Install shaft (37).
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16. Illustration 7 g01145361
13. Install cover (35) and bolts (34).
14. Install plug (36).
Illustration 8 g01145359
Illustration 9 g01145360
Improper assembly of parts that are spring loaded can cause bodily
injury.
To prevent possible injury, follow the established assembly procedure
and wear protective equipment.
15. Use Tooling (A) and a suitable press to assemble barrel assembly (29).
a. Install spring (31) and washers (32).
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17. b. Compress spring (31) until Tooling (A) is below retaining ring (33).
c. Install retaining ring (33) and slowly release the spring tension.
Illustration 10 g01145358
16. Install barrel assembly (29) and spacer (28).
17. Install spring (27) and piston (30).
Illustration 11 g01145357
18. Install bearing cone (26) and gasket (9).
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18. Illustration 12 g01145523
19. Install bearing cup (23) and pin (24).
Illustration 13 g01145522
20. Install plate (22).
Illustration 14 g01145356
Improper assembly of parts that are spring loaded can cause bodily
injury.
To prevent possible injury, follow the established assembly procedure
and wear protective equipment.
21. Install head (21) and bolts (20).
22. Tighten bolts (20) to a torque of 91 ± 4 N·m (67 ± 3 lb ft).
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19. Illustration 15 g01145355
23. Install elbow (19) and bolts (18).
Illustration 16 g01145354
24. Install the O-ring seals onto adjustment screw (9) and adjustment screw (10).
25. Install retainer (15), spring (16), and retainer (17).
26. Remove retainer (11), spring (12), spacer (13), and retainer (14).
Illustration 17 g01145342
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20. Improper assembly of parts that are spring loaded can cause bodily
injury.
To prevent possible injury, follow the established assembly procedure
and wear protective equipment.
27. Install adjustment screw (9) and adjustment screw (10).
Illustration 18 g01145341
28. Install spool (7) and spool (8).
29. Install the O-ring seals onto plug (5) and plug (6).
Illustration 19 g01145340
30. Install the O-ring seal, plug (4), plug (5), and plug (6).
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22. Illustration 20 g01145339
31. Install O-ring seals (3) onto valve (2).
Illustration 21 g01145338
32. Install valve (2) and bolts (1).
33. Tighten bolts (1) to a torque of 34 ± 3 N·m (25 ± 2 lb ft).
Illustration 22 g00359153
34. Use a dial indicator to check the axial shaft end play. Put the dial indicator on the end of the
shaft and pull on the shaft.
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23. The correct axial shaft end play is 0.01 to 0.10 mm (0.0004 to 0.004 inch). Use the correct
shim to achieve this dimension.
End By:
a. Install the steering pump. Refer to Disassembly and Assembly, "Piston Pump (Steering) -
Install".
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Wed Mar 18 12:09:30 UTC+0800 2020
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24. Shutdown SIS
Previous Screen
Product: WHEEL LOADER
Model: 966H WHEEL LOADER A6D
Configuration: 966H Wheel Loader A6D00001-UP (MACHINE) POWERED BY C11 Engine
Disassembly and Assembly
966H and 972H Wheel Loaders Machine Systems
Media Number -RENR8859-07 Publication Date -01/03/2014 Date Updated -14/12/2016
i02520130
Piston Pump (Steering) - Install
SMCS - 4306-012; 5070-012-ZH
Installation Procedure
Note: Cleanliness is an important factor. Before assembly, all parts should be thoroughly cleaned
in cleaning fluid. Allow the parts to air dry. Wiping cloths or rags should not be used to dry parts.
Lint may be deposited on the parts which may cause later trouble. Inspect all parts. If any parts are
worn or damaged, use new parts for replacement.
Illustration 1 g01145374
1. Install O-ring seal (7) and coupling (8) to steering piston pump (6).
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