Caterpillar cat 904 b compact wheel loader (prefix b4l) service repair manual (b4l00001 and up)

Service Repair Manual
Models
904B COMPACT
WHEEL LOADER

Shutdown SIS
Previous Screen
Product: COMPACT WHEEL LOADER
Model: 904B COMPACT WHEEL LOADER B4L
Configuration: 904B Compact Wheel Loader B4L00001-UP (MACHINE) POWERED BY S4Q2T Engine
Disassembly and Assembly
904B Wheel LoaderPower Train
Media Number -RENR9758-00 Publication Date -01/06/2005 Date Updated -23/06/2005
i02338391
Piston Pump (Hydrostatic) - Remove
SMCS - 3203-011
Removal Procedure
Table 1
Tool Part Number Description Quantity
A 140-7742 Sleeve 1
B
1U-9200 Ratchet 1
189-0410 Shackle 1
C 242-6163 Wrench 1
Start By:
A. Remove the seat. Refer to Disassembly and Assembly, "Seat - Remove".
B. Remove the gear pump. Refer to Disassembly and Assembly, "Gear Pump - Remove".
Personal injury can result from hydraulic oil pressure and hot oil.
Hydraulic oil pressure can remain in the hydraulic system after the
engine has been stopped. Serious injury can be caused if this pressure is
not released before any service is done on the hydraulic system.
Make sure all of the attachments have been lowered, oil is cool before
removing any components or lines. Remove the oil filler cap only when
the engine is stopped, and the filler cap is cool enough to touch with
your bare hand.
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2019/8/31https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sisw...

NOTICE
Care must be taken to ensure that fluids are contained during
performance of inspection, maintenance, testing, adjusting and repair
of the machine. Be prepared to collect the fluid with suitable containers
before opening any compartment or disassembling any component
containing fluids.
Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop
Products Guide", for tools and supplies suitable to collect and contain
fluids in Caterpillar machines.
Dispose of all fluids according to local regulations and mandates.
Note: Put identification marks on all lines, on all hoses, on all wires, and on all tubes for
installation purposes. Plug all lines, all hoses and all tubes. This helps to prevent fluid loss and this
helps to keep contaminants from entering the system.
Illustration 1 g01167299
1. Remove plate (1) .
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2. Disconnect harness assembly (2) .
3. Disconnect hose assemblies (3) and (4) from piston pump (5) .
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6. Disconnect cable assembly (10) from piston pump (5). Disconnect hose assembly (11) from
piston pump (5) .
7. Disconnect hose assembly (12) from the bottom of piston pump (5) .
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8. Attach Tooling (A) and Tooling (B) to the cab.
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9. Attach Tooling (B) and a suitable lifting device to piston pump (5) .
10. Use Tooling (C) in order to remove mounting bolts (13) from piston pump (5) and mounting
flange (14) .
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11. Raise piston pump (5) in order to remove the pump from the machine. The weight of piston
pump (5) is approximately 45 kg (100 lb).
Copyright 1993 - 2019 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Sat Aug 31 22:53:44 UTC+0800 2019
8/8(W)w

Shutdown SIS
Previous Screen
Product: COMPACT WHEEL LOADER
Model: 904B COMPACT WHEEL LOADER B4L
Configuration: 904B Compact Wheel Loader B4L00001-UP (MACHINE) POWERED BY S4Q2T Engine
Disassembly and Assembly
904B Wheel LoaderPower Train
Media Number -RENR9758-00 Publication Date -01/06/2005 Date Updated -23/06/2005
i02327908
Piston Pump (Hydrostatic) - Disassemble
SMCS - 3203-015
Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1P-0510 Driver Group 1
B 1P-1861 Retaining Ring Pliers 1
C 5P-4758 Internal Pliers 1
D 1U-7600 Slide Hammer Puller 1
E 1P-1859 Retaining Ring Pliers 1
F 1P-1857 Retaining Ring Pliers 1
G 1S-4208 Spanner Wrench 1
Start By:
A. Remove the hydraulic drive pump. Refer to Disassembly and Assembly, "Hydraulic Drive
Pump - Remove".
Personal injury can result from hydraulic oil pressure and hot oil.
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Hydraulic oil pressure can remain in the hydraulic system after the
engine has been stopped. Serious injury can be caused if this pressure is
not released before any service is done on the hydraulic system.
Make sure all of the work tools have been lowered to the ground, and
the oil is cool before removing any components or lines. Remove the oil
filler cap only when the engine is stopped, and the filler cap is cool
enough to touch with your bare hand.
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. Dirt and contaminants can damage the components of the pump or the motor. All
disassembly and assembly procedures must be performed on a clean work surface. Clean all the
interior components in clean solvent. Dry all the interior components with compressed air. Plug
ports and plug hoses on the machine during repair.
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, "Caterpillar Tools and Shop
Products Guide" for tools and supplies suitable to collect and contain
fluids on Caterpillar products.
Dispose of all fluids according to local regulations and mandates.
1. Remove bolts (1) and remove charge pump (2) .
2/23(W)w

Note: Mark the location of the charge pump on the head assembly. Crescent (M) of gear set
(4) must face toward the valves for installation purposes. The valves are indicated by
arrows.
2. Remove O-ring seal (3). Remove gear set (4). Keep the gear set together in order to ensure
proper installation of the gear set.
3. Remove bushing (5). Note the orientation of the bushing. The bushing must be installed in
the original location.
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4. Remove plate (6). Note the position of the plate.
5. Remove shaft (7) and O-ring seal (8) .
6. Remove retaining ring (9) and key (10) from the shaft.
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7. Remove bolts (11) and head assembly (12) .
8. Remove O-ring seals (13) and (14) from the head.
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9. Use Tooling (A) in order to remove bushing (15) .
10. Remove bushing (16) .
Note: Mark orientation of groove in bushing (16) for later installation of new bushing into
the original location.
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Note: Mark the position of the port plate for installation purposes. The groove in the port
plate must face the two valves on the head assembly.
11. Remove port plate (17) and bearing (18), if necessary.
Note: Perform Steps 12 and 13, if equipped.
12. Remove plug assembly (19) from the head.
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13. Disassemble the plug assembly, as follows: O-ring seal (20), O-ring seal (21) and locking
plug (22) .
14. Remove valve (23) from the head.
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15. Disassemble the valve, as follows: O-ring seal (26), backup ring (25) and O-ring seal (24) .
16. Remove valve (27) from the head. Refer to Step 15 for the disassembly procedure.
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17. Remove caps (28), O-ring seals (31), coil (29), and coil (30) .
18. Remove five bolts (32) .
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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.
19. Remove cartridge (33), cartridge (35), and gasket (34) .
20. Remove springs (36), retainers (37), and spool (39) from housing (38) .
21. Remove O-ring seal (40) .
22. Remove barrel assembly (41) from the pump housing. Keep the barrel assembly together
with the pistons.
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23. Mark the location of the pistons in the barrel assembly. Remove pistons and plate (42) from
the barrel assembly.
24. Remove spring retainer (43) .
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25. Remove shim (44) and springs (45). Note the position of the springs. The springs must be
installed in the same position for proper clearance.
26. Use a suitable press and Tooling (B) in order to remove retaining ring (46) .
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27. Remove washer (47), spring (48), and washer (47) from the barrel assembly.
28. Use Tooling (C) in order to remove retaining ring (49) .
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29. Use Tooling (D) in order to remove seal (50) .
30. Use Tooling (C) in order to remove retaining ring (51) .
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31. Remove shaft (52). It may be necessary to use a soft faced hammer in order to remove the
shaft.
32. Use Tooling (E) in order to remove retaining ring (53) .
33. Use a suitable press in order to remove shaft (52) from bearing (54) .
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34. Remove swashplate assembly (55) .
35. Remove plate (56) from the swashplate. Remove rods (57) from the swashplate.
36. Remove bearings (58) .
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37. Remove bearing cradles (59) .
38. Remove plug (61) and retainer (60) on both sides of the pump housing.
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39. Remove bolts (62). Remove cover (63) with valve assembly (64) .
40. Remove bolts (65) and cover (66) .
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41. Remove O-ring seal (67) from the cover.
42. Remove nut (68). Unscrew the cover from the valve assembly.
43. Remove O-ring seal (69) .
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Ring (71) is on the opposite end.
44. Remove O-ring seal (72), and rings (70) and (71) from each side.
Personal injury can result from parts and/or covers under spring
pressure.
Spring force will be released when covers are removed.
Be prepared to hold spring loaded covers as the bolts are loosened.
45. Use a suitable press to relieve the pressure on the spring. Use Tooling (F) in order to remove
retaining ring (73) .
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Caterpillar cat 904 b compact wheel loader (prefix b4l) service repair manual (b4l00001 and up)

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