This document provides instructions for disassembling the piston pump of a 972M Wheel Loader. It involves 21 steps, including removing bolts, seals, valves, actuators, pistons, bearings and other components. Special care must be taken when removing spring-loaded or heavy parts to avoid injury. All removed parts should be marked for proper reassembly.
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2. Shutdown SIS
Previous Screen
Product: WHEEL LOADER
Model: 972M WHEEL LOADER A8P
Configuration: 972M Wheel Loader A8P00001-UP (MACHINE) POWERED BY C9.3 Engine
Disassembly and Assembly
966M, 966M Series XE, 972M and 972M Series XE Wheel Loaders
Media Number -UENR5562-08 Publication Date -01/05/2018 Date Updated -24/05/2018
i05648965
Piston Pump (Implement) - Disassemble - 45 cc
SMCS - 5070-015-FD; 5070-015-II; 5070-015; 5084-015; 5084-015-QP
Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A
1P-0510 Driver Gp 1
5P-8247 Hard Washer 1
B 8H-0663 Bearing Puller Gp 1
Start By:
a. Remove the piston pump (steering) .
Illustration 1 g03586796
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3. 1. Remove bolts (2) and valve (1).
Illustration 2 g03586798
2. Remove gasket (3) from valve (1).
Illustration 3 g03586800
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 bolts (4) and head (5).
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4. Illustration 4 g03586802
4. Remove O-ring seal (6), port plate (7), and bearing cup (8) from head (5).
Illustration 5 g03586806
Illustration 6 g03586808
5. Remove nut (9), O-ring seal (10), and solenoid (11).
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5. Illustration 7 g03586811
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 cartridge (12) from adapter (13).
7. Remove adapter (13) from the pump housing.
Illustration 8 g03586840
8. Remove rings (14) and O-ring seal (15) from adapter (13).
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6. Illustration 9 g03586845
Illustration 10 g03586853
9. Remove piston (16), spring (17), and retainer (18) from the pump housing.
Illustration 11 g03586863
10. Remove plug (19), plugs (20), and the O-ring seals.
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8. Illustration 15 g03586987
Illustration 16 g03586988
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.
14. Use Tooling (A) and a suitable press to remove retaining ring (27) from barrel assembly
(23).
15. Remove spring (28), washer (29), and pins (30) from barrel assembly (23).
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9. Illustration 17 g03587136
16. Remove swashplate (31).
Illustration 18 g03587180
17. Remove screws (32), and bearings (33).
18. Remove shaft assembly (34) and bearing cup (35).
19. Remove O-ring seal (36) and swashplate spring (37).
Illustration 19 g03587302
20. Use Tooling (B) and a suitable press to remove bearing cone (38) from shaft (34).
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10. Illustration 20 g03587305
21. Remove retaining ring (39) and lip seal (40).
Copyright 1993 - 2021 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Fri Apr 9 18:45:05 UTC+0800 2021
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12. S/N - R1Z1-UP
S/N - XCR1-UP
Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 422-5473 Lifting Eye Assembly 2
B 1P-0510 Driver Gp 1
C 154-6360 Forcing Bolt 2
Start By:
a. Remove the implement pump.
NOTICE
Care must be taken to ensure that fluids are contained during
performance of inspection, maintenance, testing, adjusting, and repair
of the product. Be prepared to collect the fluid with suitable containers
before opening any compartment or disassembling any component
containing fluids.
Refer to Special Publication, NENG2500, "Dealer Service Tool
Catalog" for tools and supplies suitable to collect and contain fluids on
Cat products.
Dispose of all fluids according to local regulations and mandates.
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13. Illustration 1 g03655902
1. Remove bolts (1) and adapter (2) from the head assembly.
Illustration 2 g03655896
2. Remove O-ring seal (3) from adapter (2).
Illustration 3 g03583686
3. Remove bolts (4) and control valve (5).
Illustration 4 g03651271
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14. 4. Remove O-ring seals (6) from control valve (5).
Illustration 5 g03654794
5. Remove bolts (7) and position sensor (8) from cover (9).
Note: Pry slots available on position sensor (8) to aid removal.
Illustration 6 g03654808
6. Remove O-ring seal (10) from position sensor (8).
Illustration 7 g03654813
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15. 7. Remove bolts (11) and cover (9) from pump body (12).
Note: Pry slots available on cover (9) to aid removal.
Illustration 8 g03654817
8. Remove O-ring seal (13) from cover (9).
Illustration 9 g03654834
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.
9. Mark the orientation of head assembly (15) in relation to pump body for reassembly
purposes. Remove bolts (14) from head assembly (15).
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16. 10. Use Tooling (A) and a suitable lifting device to remove head assembly (15) from pump
body (12). The weight of head assembly (15) is approximately 27 kg (60 lb).
Note: The head assembly bearing can be damaged if the head assembly is not lifted straight
up, use caution. Best to cover the shaft spline before lifting the head assembly to lower
possibility of the head assembly bearing damage. The port plate can fall off when lifting the
head assembly. Look to secure the port plate as lifting the head assembly from the pump
body. Look to confirm that the control and bias actuator pistons are released from the head
assembly.
Illustration 10 g03654838
11. Remove port plate (16) from head assembly (15).
Illustration 11 g03654840
(X) Bearing Notch
(Y) Bearing Joint
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17. Illustration 12 g03654845
12. Mark head assembly (15) at Bearing Notch (X) and Bearing Joint (Y) locations for
assembly orientation of bearing assembly (17).
13. If necessary, use Tooling (B) and a suitable press to remove bearing retainer (9) from head
assembly (3).
Illustration 13 g03654850
Note: Measure set screws (19) height for reassembly purposes.
14. Remove nuts (18) and set screws (19) from head assembly (15).
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18. Illustration 14 g03654852
15. Remove plug (20), plug (21), and the O-ring seals from head assembly (15).
Illustration 15 g03653287
16. Remove bias actuator (22), spring (23), and control actuator (24) from pump body (12).
Illustration 16 g03653288
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19. Illustration 17 g03653291
17. Place pump body (12) on an angle and lift rotating group (25) out of pump body (12) by
retainer (27).
18. Remove pistons (26) and retainer (27) from the barrel assembly.
Illustration 18 g03653289
19. Remove hold-down ball (28), spacers (29), and springs (30) from the barrel assembly.
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20. Illustration 19 g03653293
20. Remove swashplate (31) from pump body (12).
Illustration 20 g03653295
21. Remove bearing assemblies (34) and timing pins (35) from swashplate (31).
22. Remove bolts (32), the washers, and sensor target (33).
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21. Illustration 21 g03653299
23. Remove bolts (37), retainers (38), and links (36) from swashplate (31).
Illustration 22 g03653302
24. Remove plugs (39), fitting (40), and the O-ring seals.
25. Remove bearing cradles (41) and O-ring seal (42) from pump body (12).
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22. Illustration 23 g03653303
26. Remove bolts (43) from pump body (12).
Illustration 24 g03653304
27. Use Tooling (C) to remove seal retainer (44).
Illustration 25 g03653306
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23. 28. Remove O-ring seal (45), lip seals (46), and O-ring seals (47) from seal retainer (44).
Illustration 26 g03653307
29. Remove shaft assembly (48) from pump body (12).
Illustration 27 g03653312
30. Remove retaining ring (49) from shaft assembly (48).
Illustration 28 g03653314
31. Use a suitable press in order to remove bearing (50) from shaft assembly (48).
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24. Copyright 1993 - 2021 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Fri Apr 9 18:46:02 UTC+0800 2021
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26. S/N - R1Z1-UP
S/N - XCR1-UP
Assembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 421-5661 Lifting Eye Assembly 2
C 1P-0510 Driver Gp 1
D - Loctite 242 -
E 6V-2055 Grease 1
1. Lubricate all sliding surfaces, radial O-ring seals, lip seals, shaft, and bearings lightly with
hydraulic oil prior to assembly.
Illustration 1 g03578617
2. Install O-ring seal (49) onto cover (48).
Illustration 2 g03578628
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27. 3. Install cover (48) and bolts (47). Tighten bolts (47) to a torque of 28 ± 7 N·m (21 ± 5 lb ft).
Illustration 3 g03578856
4. Use a suitable press to install bearing (46) onto shaft assembly (44).
Illustration 4 g03578676
5. Install retaining ring (45) onto shaft assembly (44).
Illustration 5 g03578576
6. Install shaft assembly (44) into pump housing (15).
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28. Illustration 6 g03578863
Illustration 7 g03578559
7. Use Tooling (C) to install lip seals (42).
8. Install O-ring seal (41) and O-ring seals (43) onto seal retainer (40).
Illustration 8 g03578877
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29. 9. Apply Tooling (D) onto bolts (39).
10. Install seal retainer (40) and bolts (39) onto pump housing (15). Tighten bolts (39) to a
torque of 28 ± 7 N·m (20 ± 5 lb ft).
Illustration 9 g03578416
11. Install plugs (35), adapter (36), and the O-ring seals into pump housing (15).
12. Install bearing cups (37) and O-ring seal (38) into pump housing (15).
Illustration 10 g03578445
13. Install actuators (32) , retainers (34), and bolts (33) onto swashplate (30). Tighten bolts (33)
to a torque of 12 ± 3 N·m (106.2 ± 26.6 lb in).
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30. Thank you very much for
your reading. Please Click
Here. Then Get COMPLETE
MANUAL. NO WAITING
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31. Illustration 11 g03578442
14. Install bearing assemblies (31) onto swashplate (30).
Illustration 12 g03578356
15. Install swashplate (30) into pump body (15).
Note: Ensure that the pins on the bearings align with the holes in pump body (15).
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32. Illustration 13 g03578318
16. Install spacers (28), spring set (29) and hold-down ball (27) onto the barrel assembly.
Illustration 14 g03578278
17. Install pistons (25) and retainer (26) onto the barrel assembly.
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33. Illustration 15 g03382799
18. Place pump body (15) horizontally and install rotating group (24).
Illustration 16 g03382780
19. Install control actuator (23), spring (22), and bias actuator (21) onto pump body (15).
Illustration 17 g03382744
20. Install plug (19), plug (20), and the O-ring seals into head assembly (13).
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