Caterpillar Cat 972G Wheel Loader (Prefix 4WW) Service Repair Manual (4WW00001 and up).pdf

Shutdown SIS
Previous Screen
Product: WHEEL LOADER
Model: 972G WHEEL LOADER 4WW
Configuration: 972G Wheel Loader 4WW00001-UP (MACHINE) POWERED BY 3306 Engine
Disassembly and Assembly
966G and 972G Wheel Loaders Power Train
Media Number -RENR2106-08 Publication Date -01/05/2004 Date Updated -28/05/2004
i07399197
Torque Converter (Freewheel Stator) - Assemble
SMCS - 3101-016
Assembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 138-7575 Link Bracket 2
B 1P-0510 Driver Gp 1
C 2P-8312 Retaining Ring Pliers 1
D 7F-6068 Sleeve 1
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.
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972G Wheel Loader 4WW00001-UP (MACHINE) POWERED BY 3306 Engine(SEB...
2021/10/17
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Illustration 1 g00878809
1. Install bearing (39) and ring (40) on rotating housing (15).
1. Install locating dowel (38) in turbine hub assembly (37).
2. Install turbine hub assembly (37) to turbine (35). Install bolts (36) and the washers. The
torque for bolts (36) is 60 ± 7 N·m (44 ± 5 lb ft).
3. Turn rotating housing (15) onto opposite side. Install turbine (35).
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4. Install bearing spacer (34).
5. Use Tooling (C) to install retaining ring (33) on turbine hub assembly (37). Retaining ring
(33) must be securely seated in the groove.
6. Install O-ring seal (32).
7. Install end cover (31) and retaining ring (30) in rotating housing (15).
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8. Lower the temperature of bearing (29).
9. Install bearing (29) in impeller (14).
Note: The notch in bearing (29) must face downward, as shown.
10. Install drive gear (28) and bolts (27). The torque for bolts (27) is 105 ± 15 N·m
(75 ± 11 lb ft).
Note: If the torque converter is equipped with a freewheel stator, continue with Steps 11
through 16.
11. Install the seal ring (not shown) onto carrier shaft (17). Use a suitable press to install carrier
shaft (17) in impeller (14).
12. Install spacer (26) over shaft (17).
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13. Install freewheel cam (25), freewheel springs (24), freewheel rollers (23), and bearing race
(22) in stator (19).
Note: If necessary, raise the temperature of stator (19) to a maximum temperature of 135 °C
(275 °F). Install the cam with the IMPELLER SIDE facing downward. Continue with the
installation until freewheel cam (25) contacts the retaining ring (not shown).
Note: Install freewheel springs (24) with the maximum number of loops toward the outside
diameter of freewheel cam (25).
14. Install washer (21) and retaining ring (20) on stator (19). Repeat the procedure for the
opposite side of stator (19).
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15. Install stator (19) on impeller (14).
16. Install plate (18) and retaining ring (16) on carrier shaft (17).
17. Assemble carrier shaft (17), as follows.
18. Install ring (42) on shaft (41).
19. Use a suitable press to install inner race (43) onto shaft (41).
20. Install outer bearing (44).
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21. Use Tooling (B), Tooling (D), and a suitable press to install shaft assembly (41) and outer
bearing (44) into carrier shaft (17).
22. Install plate (45) and retaining ring (46).
23. Install impeller (14) on rotating housing (15). The weight of the impeller assembly is
approximately 36 kg (80 lb).
24. Install bolts (13) and the washers. The torque for bolts (13) is 60 ± 7 N·m (44 ± 5 lb ft).
25. Use Tooling (B) to install bearing (12) in pump drive gear (11).
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26. Install pump drive gear (11) and drive gear shaft (10).
27. Use Tooling (A) and a suitable lifting device to install the torque converter housing over the
torque converter. The weight of the torque converter housing is approximately 113 kg
(250 lb).
28. Install bolt (9) and the washer that holds drive gear shaft (10) to the torque converter
housing. The torque for bolt (9) is 240 ± 40 N·m (180 ± 30 lb ft).
29. Install pump drive flange (8) and bolts (7). The torque for bolts (7) is 60 ± 12 N·m
(44 ± 9 lb ft).
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30. Install bolts (6) and the washers that hold the torque converter to the torque converter
housing. The torque for bolts (6) is 50 ± 10 N·m (37 ± 7 lb ft).
31. Install O-ring seal (5).
32. Install gear (3), retainer (2), and bolt (1). The torque for bolt (1) is 120 ± 20 N·m
(90 ± 15 lb ft).
33. Install torque converter speed sensor (4), the seal, and the washer. Adjust torque converter
speed sensor (4) to maintain an air gap of 0.71 ± 0.18 mm (0.028 ± 0.007 inch). The torque
for torque converter speed sensor (4) is 25 ± 5 N·m (18 ± 4 lb ft).
End By:
a. Connect the torque converter to the transmission and to the output transfer gears. Refer to
Disassembly and Assembly, "Torque Converter to Transmission, Output Transfer Gears -
Connect".
Copyright 1993 - 2021 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Sun Oct 17 19:27:25 UTC+0800 2021
9/9
2021/10/17

Shutdown SIS
Previous Screen
i02642179
Transmission from Output Transfer Gears - Separate
SMCS - 3002-076
Separation Procedure
Table 1
Required Tools
Start By:
A. Separate the torque converter from the transmission. Refer to Disassembly and Assembly,
"Torque Converter from Transmission, Output Transfer Gears - Separate".
Note: Put identification marks on all harness assemblies for installation purposes. Plug all tube
assemblies. This helps to prevent fluid loss, and this helps to keep contaminants from entering the
system.
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1. Remove bolts (1) and remove drain tube assembly (2) .
2. Attach Tooling (A) and a suitable lifting device to transmission planetary (4) .
3. Remove O-ring seal (3) .
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4. Disconnect harness assemblies (6). Disconnect harness assembly (8) .
5. Remove bolts (5) which hold transmission planetary (4) to output transfer gear case (7) .
Note: If necessary, use forcing screws in order to separate transmission planetary (4) from
output transfer gear case (7) .
6. Use Tooling (A) and the suitable lifting device in order to separate transmission planetary
(4) from output transfer gear case (7). The weight of transmission planetary (4) is
Copyright 1993 - 2021 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Sun Oct 17 19:28:21 UTC+0800 2021
3/3
2021/10/17

Shutdown SIS
Previous Screen
i02299775
Transmission Planetary - Disassemble
SMCS - 3160-015
Disassembly Procedure
Table 1
Required Tools
B 1P-0520 Driver Gp 1
C 8H-0663 Bearing Puller 1
Start By:
A. Separate the transmission from the output transfer gears. Refer to Disassembly and
Assembly, "Transmission from Output Transfer Gears - Separate".
Note: Cleanliness is an important factor. Before the disassembly procedure, the exterior of the
component should be thoroughly cleaned. This will help to prevent dirt from entering the internal
mechanism.
Note: Put identification marks on all lines, on all hoses, on all wires, and on all tubes for
installation purposes. Plug all lines, hoses, and tubes. This helps to prevent fluid loss and this
helps to keep contaminants from entering the system.
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1. Remove O-ring seal (1) from the housing.
2. Remove bolt (3), retainer (2), and drive gear (4) from the end of the input shaft.
3. Remove plate (5) .
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4. Attach Tooling (A) and a suitable lifting device to the transmission, as shown. The weight
of the transmission is approximately 544 kg (1200 lb).
5. Carefully position the planetary group on the opposite end so that No. 6 clutch housing (6)
is facing upward, as shown.
6. Remove retaining ring (8) from output shaft (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.
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7. Remove bolts (9) and No. 6 clutch housing (6). Mark the location of the long bolts.
8. Remove clutch piston (10) from No. 6 clutch housing (6) .
9. Remove seal rings (11) and (12) from clutch piston (10) .
10. Remove clutch plate (14) and springs (13) .
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11. Remove clutch plates (15) and friction discs (16) .
12. Remove ring gear (17). Remove transmission speed sensors (18) .
13. Remove carrier assembly (19) .
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14. Remove metal seal ring (20) from carrier assembly (19) .
15. Use a hammer and a punch to push the spring pins through carrier assembly (19) and into
planetary shafts (21) .
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16. Use a hammer and a punch to remove planetary shafts (21) from carrier assembly (19) .
17. Remove thrust discs (22), planetary gears (23), and bearings (24) from the carrier assembly.
Remove spring pins (25) from planetary shafts (21) .
18. Remove O-ring seal (26). Remove bolts (27) from manifold (28) .
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19. Disconnect the harness assemblies which are attached to transmission modulating valves
(29). Remove transmission modulating valves (29) from the transmission housing.
20. Remove retaining ring (32) and gear (30). Remove retaining ring (31) .
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21. Use Tooling (A) and a suitable lifting device to remove manifold (28). The weight of
manifold (28) is approximately 85 kg (190 lb).
22. Remove bolt (33) which holds the harness assembly in place.
23. Remove retaining ring (34) and bearing (35) from manifold (28) .
24. Remove retaining ring (36) and clutch housing (37) .
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25. Remove O-ring seal (38) from clutch housing (37) .
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.
26. Use steel spacers and a suitable press to push on retainer plate (40). Remove retaining ring
(39) from the clutch housing.
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972G Wheel Loader 4WW00001-UP (MACHINE) POWERED BY 3306 Engine(S...
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27. Separate retaining ring (39), retainer plate (40), three coned disc springs (41), and clutch
piston (42) .
28. Remove seal rings (43) from clutch piston (42) .
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29. Remove seal rings (44) from clutch housing (37) .
30. Remove retaining ring (45) from the output shaft. Remove hub (46) .
31. Remove friction discs (47) and clutch plates (48) .
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32. Remove clutch plate (49) and ring gear (50) .
33. Remove springs (51). Remove friction discs (52) and clutch plates (53) .
34. Remove clutch piston (54). Remove O-ring seals (55) and (56) .
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36. Use Tooling (A) and a suitable lifting device to remove housing (59). The weight of housing
(59) is approximately 66 kg (145 lb).
Note: The clutch piston may be stuck in housing (59). As housing (59) is removed, the
clutch piston may fall.
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37. Remove clutch piston (60) .
39. Remove friction discs (63) and clutch plates (64) .
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40. Remove O-ring seals (65) and (66). Remove springs (68) and carrier assembly (69).
Remove rods (67) .
41. Remove gear (70) from carrier assembly (69) .
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42. Remove retaining ring (71) and bearing (72) .
43. Use several small steel rods (73) (3.175 mm (0.1250 inch) diameter and one pointed tip) to
compress the retaining ring that holds carrier assembly (69) to ring gear (74) .
44. Remove carrier assembly (69) from ring gear (74) .
45. Remove retaining ring (75) from carrier assembly (69) .
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47. Use a hammer and a punch to remove planetary shafts (76) from carrier assembly (69) .
48. Remove thrust discs (77), planetary gears (78), and bearings (79) from the carrier assembly.
Remove spring pins (80) from planetary shafts (76) .
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49. Remove retaining ring (81) that holds output shaft (82) to the input shaft. Remove output
shaft (82) .
50. Remove O-ring seal (83) from output shaft (82) .
51. Remove retaining ring (85) .
52. Remove sun gear (84) from output shaft (82) .
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53. Use a suitable press to push output shaft (82) out of bearing (86), as shown.
54. If necessary, remove bearings (87) from both ends of output shaft (82) .
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55. Use Tooling (A) and a suitable lifting device to remove housing (88). The weight of housing
(88) is approximately 61 kg (135 lb).
56. Remove clutch piston (89), friction discs (90), and clutch plates (91) .
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58. Remove retaining ring (94) from the input shaft.
59. Remove springs (95) and ring gear (96). Remove O-ring seals (97) and (98) .
60. Remove carrier assembly (99) from the input shaft. The weight of the carrier assembly is
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61. Remove gear (100) .
62. Place a suitable wood block under carrier assembly (99) .
63. Use several small steel rods (101) (2.36 mm (0.093 inch) diameter and one pointed tip) to
compress the retaining ring that holds carrier assembly (99) to ring gear (102) together.
64. Remove ring gear (102) from carrier assembly (99) .
65. Remove retaining ring (105) from carrier assembly (99) .
66. Remove retaining ring (104). Remove sun gear (103) and the bearing. Use Tooling (B) to
remove sun gear (103) and the bearing.
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Caterpillar Cat 972G Wheel Loader (Prefix 4WW) Service Repair Manual (4WW00001 and up).pdf

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Caterpillar Cat 972G Wheel Loader (Prefix 4WW) Service Repair Manual (4WW00001 and up).pdf