Caterpillar Cat 325D Excavator (Prefix CYW) Service Repair Manual (CYW00001 and up).pdf

Service Repair Manual
Models
325D and 325D L Excavator

Assembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
B 1P-2420 Transmission Repair Stand 1
C 138-7575 Link Bracket 3
D
1P-0510 Driver Group 1
1U-8605 Seal Guide 1
E 1P-1859 Retaining Ring Pliers 1
H 1U-6396 O-Ring Assembly Compound 1
Illustration 1 g01200516
1. Install gasket (107) onto pump housing (72) .
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2. Install cover (106) and bolts (105) onto pump housing (72) .
3. Install guide pins (104) onto pump housing (72) .
4. Install bearings (103) onto pump housing (72) .
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5. Install bearing (102) into swashplate (97) .
6. Install dowel pins (101) into swashplate (97) .
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7. Install bearings (100) onto swashplate assembly (97) .
8. Install plate (99) onto swashplate assembly (97) .
9. Repeat Step 5 through Step 8 for swashplate assembly (98) .
10. Install swashplate assemblies (97) and (98) into pump housing (72) .
Note: The swashplate assemblies must be installed in the original position during assembly.
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11. Install retaining ring (90) onto shaft assembly (91) .
12. Raise the temperature of bearing (95) and bearing (93) . Install bearing (95) and bearing
(93) onto shaft assembly (91) .
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13. Install ring (94) onto shaft assembly (91) .
14. Repeat Step 11 through Step 13 for shaft assembly (92) .
15. Lower the temperature of the shaft assemblies. Install shaft assemblies (91) and (92) into
pump housing (72) .
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Note: The pump has been removed from Tooling (B) for photographic purposes only.
16. Use Tooling (E) to install retaining rings (90) .
17. Install springs (89) into barrel (84) .
18. Install retainer (88) onto barrel (84) .
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19. Install cap (87) onto barrel (84) .
20. Install pistons (85) into piston plate (86) .
21. Install piston assembly (83) into barrel (84) .
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325D & 325D L Excavators CYW00001-UP (MACHINE) POWERED BY C7 Engi...
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22. Repeat Step 17 through Step 21 for the remaining barrel assembly.
23. Install barrel assemblies (81) and (82) into pump housing (72) .
Note: It may be necessary to use string to aid in the removal procedure. The barrel
assemblies must be installed in the original position during assembly.
24. Install O-ring seal (80) onto covers (78) .
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25. Install covers (78) , bolts (77) , and plugs (79) onto pump housing (72) .
26. Install O-ring seals (76) into pump housing (72) .
27. Install plug (76) into covers (75) .
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28. Install covers (75) , bolts (74) , and plugs (73) onto pump housing (72) .
29. Install O-ring seals (68) and (69) onto pump housing (72) . Install port plates (70) and (71) .
Note: The port plates must be installed in the original position during assembly.
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30. Install orifices (67) into head (58) .
31. Install plugs (65) and (66) into head (58) .
32. Install bearings (64) into the head.
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33. Install O-ring seal (63) into covers (61) .
34. Install nipples (62) , covers (61) and bolts (60) onto head (58) . Install caps (59) onto
nipples (62) .
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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.
35. Attach Tooling (C) and a suitable lifting device to head (10) . Install head (58) , bolts (56) ,
and bolts (57) . The weight of head (58) is approximately 41 kg (90 lb).
36. Install O-ring seal (54) and lip seal (55) onto the seal assembly.
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37. Install shrink wrap on the shaft. This will protect the seal during the installation procedure.
Install the gasket and bell housing (53) . Install bolts (51) .
38. Use Tooling (D) to install seal assembly (52) .
39. Install plugs (49) . Install three plugs (50) into the pump control.
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40. Install slide plate (47) and dowel (48) onto the control linkage.
41. Install control linkage (46) and sleeve (45) into the pump control.
42. Install O-ring seal (44) onto the pin.
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43. Install pin (43) into the pump control.
44. Install shims (38) , spool (39) , spring (40) , spring (41) , and control piston (42) into the
pump control.
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45. Install O-ring seal (37) onto the cover.
46. Install cover (36) onto the pump control. Install bolts (35) .
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47. Install pilot piston (34) into the pump control.
48. Install ball (33) into the guide. Install guide (32) into the pump control. Install spring (31)
and spring (30) into the pump control.
49. Install O-ring seal (26) onto the adjuster. Install adjuster (24) . Install setscrew (22) . Install
nut (23) and nut (25) . Install O-ring seal (27) onto the retainer. Install retainer (29) . Install
O-ring seal (28) .
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50. Install cover assembly (21) into the pump control. Install bolts (20) .
51. Install dowel pin (19) into the pin.
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52. Place the pump control in a soft jawed vise. Support pin assembly (17) . Install pin assembly
(17) into the pump control. Install piston (18) into the pump control.
53. Install O-ring seal (15) and backup ring (16) onto the stopper.
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54. Install stopper (14) into the pump control.
55. Install screw (13) . Install bolts (11) . Install cover (12) into the pump control.
56. Install nut (10) onto the pump control.
57. Repeat Step 53 through Step 56 for the other side of the pump control.
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Right Pump Only
58. Install O-ring seal (6) , O-ring seal (7) , O-ring seal (8) , and O-ring seal (9) onto the
proportional reducing valve.
Right Pump Only
59. Install proportional reducing valve (5) onto pump control (1) . Install bolts (4) .
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60. Install pump control (1) .
61. Install bolts (2) and fitting (3) .
End By: Install the main hydraulic pump. Refer to Disassembly and Assembly, "Main Hydraulic
Pump - Install".
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Sat May 23 12:33:20 UTC+0800 2020
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Product: EXCAVATOR
Model: 325D L EXCAVATOR CYW
Configuration: 325D & 325D L Excavators CYW00001-UP (MACHINE) POWERED BY C7 Engine
Disassembly and Assembly
324D, 325D, 326D and 329D Excavators and 329D MHPU Mobile Hydraulic Power
Unit Machine Systems
Media Number -RENR8646-22 Publication Date -01/02/2015 Date Updated -12/09/2018
i07305499
Main Hydraulic Pump - Install
SMCS - 5070-012
S/N - A3R1-UP
S/N - AZP1-UP
S/N - BFC1-UP
S/N - BTK1-UP
S/N - BYS1-UP
S/N - CYW1-UP
S/N - CZF1-UP
S/N - DBH1-UP
S/N - DJF1-UP
S/N - DTZ1-UP
S/N - EBM1-UP
S/N - EJC1-UP
S/N - GBR1-UP
S/N - GPB1-UP
S/N - GPK1-UP
S/N - J8D1-UP
1/9
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S/N - J9D1-UP
S/N - JAT1-UP
S/N - JHJ1-UP
S/N - JJG1-UP
S/N - JZR1-UP
S/N - KBE1-UP
S/N - L5G1-UP
S/N - LAB1-UP
S/N - LAL1-UP
S/N - MCL1-UP
S/N - MNB1-UP
S/N - MND1-UP
S/N - NAC1-UP
S/N - PAL1-UP
S/N - PKE1-UP
S/N - PYT1-UP
S/N - RSK1-UP
S/N - SCR1-UP
S/N - SCY1-UP
S/N - SYM1-UP
S/N - T2D1-UP
S/N - T2S1-UP
S/N - TPM1-UP
S/N - TRH1-UP
S/N - TSN1-UP
S/N - TZL1-UP
2/9
2020/5/23

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S/N - WDK1-UP
S/N - WLT1-UP
S/N - XDB1-UP
S/N - YFW1-UP
Installation Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 439-3940 Link Bracket 1
B 1U-9200 Lever Puller Hoist 1
C 439-3939 Link Brackets 2
1. Install O-ring seal (44).
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2. Install pilot pump (43) and install bolts (42).
3. Install adapter (41) and install bolts (38). Install O-ring seal (40) and install coupling (39).
4. Install auxiliary pump (37) and install bolts (36).
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Note: If the coupling is stepped on one end, the stepped end should be installed facing out
towards the engine.
5. If equipped with flexible coupling. Tighten bolts (34A) to a torque of 110 ± 10 N·m
(81 ± 7 lb ft). Tighten the bolts that hold coupling insert (35A) to a torque of 320 ± 10 N·m
(236 ± 7 lb ft).
6. If equipped with hub type coupling. Install gear (35) and install bolt (34). Torque bolt
(34) to 240 ± 20 N·m (177 ± 15 lb ft).
7. Install main hydraulic pump (32). The weight of main hydraulic pump (32) is approximately
250 kg (550 lb). Install bolts (33). Remove Tooling (A), (B), and (C). Remove the suitable
lifting device.
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Caterpillar Cat 325D Excavator (Prefix CYW) Service Repair Manual (CYW00001 and up).pdf

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Caterpillar Cat 325D Excavator (Prefix CYW) Service Repair Manual (CYW00001 and up).pdf