Caterpillar cat m312 excavator (prefix 6 tl) service repair manual (6tl00410 and up)

Service Repair Manual
Models
M312 Excavator

Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: M312 EXCAVATOR 6TL
Configuration: M312 Excavator 6TL00410-UP (MACHINE) POWERED BY 3054 Engine
Disassembly and Assembly
M312 and M315 Excavators Power Train Supplement
Media Number -RENR4026-00 Publication Date -01/12/2000 Date Updated -09/10/2001
i01354524
Travel Motor - Disassemble
SMCS - 4351-015
S/N - 6TL1140-UP
S/N - 7ML1917-UP
Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
(A) 1U-7563 Hex Wrench 1
(B) 1U-7600 Slide Hammer Puller Gp 1
(C) 6V-3821 Bolt 1
(D) 8H-0663 Bearing Puller 1
Start By:
A. Remove the travel motor. Refer to Disassembly and Assembly, "Travel Motor - Remove" in
this manual.
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.
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https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/siswe...

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.
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.
Illustration 1 g00715031
1. Remove two drain plugs (2) from housing (1). Drain the oil from the travel motor into a
suitable container for storage or disposal.
2. Mark brake valve (3) for reassembly purposes. Remove socket head bolts (4), bolts (5),
covers (6) and gaskets (7) .
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3. Remove two socket head bolts (8). Remove brake valve (3) .
4. Remove two large O-ring seals (9) and two small O-ring seals (10) .
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5. Remove four bolts (11). Remove cover (12) .
6. Remove O-ring seal (13) .
7. Remove piston assembly (14) from the brake valve.
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8. Remove screw plug (15), pin (16) and retainer (17) from spool (18). Remove screw (23),
spring retainers (21), spring (22), pin (20) and retainer (19) from spool (18) .
9. Remove four socket head bolts (24). Remove cover (25) .
10. Remove O-ring seal (26) .
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11. Remove valve (27), O-ring seal (28), spring (29) and plunger (30). Remove lock (31),
spring (32) and plunger (33) .
12. Repeat Step 11 on the other side.
13. Remove plug (34) and the O-ring seal. Plug (35) and the O-ring seal. Plug (36) and the O-
ring seal.
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14. Use Tooling (A) in order to remove valve (37) .
15. Remove plug (38) and the O-ring seal.
16. Remove eight bolts (39). Remove O-ring seal (40) .
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17. Remove port plate (41) .
18. Remove the plastic caps. Remove valve assemblies (42). Mark the two covers for
reassembly purposes.
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19. Remove three O-ring seals (43) from both valves.
20. Remove plugs (43) and the O-ring seals.
21. Remove bolts (44) and cover (45) .
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22. Remove large O-ring seal (46). Remove plug (47) and the O-ring seal.
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.
Note: Cover (49) is under spring pressure.
23. Carefully remove bolts (48) and cover (49). Remove plastic cap (50) .
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24. Remove spring (51) and bushing (52) .
25. Remove four small O-ring seals (53) and one large O-ring seal (54) .
26. Remove retaining ring (55) and valve assembly (56) .
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27. Remove clip (57). Remove stem (58) from spool (59) .
28. Remove plug (60) and the O-ring seal.
Note: Record distance (X) from the locknut to the end of the screw for installation purposes.
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29. Remove screw (61) and dowel (62) .
30. Remove spring (63) and cap (64) .
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31. Remove screw (65) in order to remove the piston.
32. Install Tooling (C). Remove seal (66) .
33. Remove plastic caps (67) .
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Note: Record the distance from the locknut to the end of the set screw for installation
purposes.
34. Remove locknuts (68) and screws (69) .
35. Use the appropriate retaining ring pliers to remove retaining ring (70) .
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36. Remove shim (71) .
37. Use Tooling (B) in order to remove seal (72) .
38. Use a suitable press in order to remove rotator assembly (73) .
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39. Remove Tooling (C) from barrel (74) .
40. Remove screws (75) from retainer (76). Remove pistons (77) and center pin (78) .
41. Remove spring (79) and shim (80) .
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42. Remove rings (81) .
43. Remove retaining ring (82) and shim (83) .
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44. Place the rotor assembly in a suitable press. Use Tooling (D) in order to press shaft (84)
from bearing (85), shim (86) and bearing (87) .
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Tue Jun 2 11:25:36 UTC+0800 2020
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Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: M312 EXCAVATOR 6TL
Configuration: M312 Excavator 6TL00410-UP (MACHINE) POWERED BY 3054 Engine
Disassembly and Assembly
M312 and M315 Excavators Power Train Supplement
Media Number -RENR4026-00 Publication Date -01/12/2000 Date Updated -09/10/2001
i01358326
Travel Motor - Assemble
SMCS - 4351-016
S/N - 6TL1140-UP
S/N - 7ML1917-UP
Assembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
(A) 1U-7563 Hex Wrench 1
(C) 6V-3821 Bolt 1
(E) 149-4935 Measuring Tool 1
(F) 1P-0510 Driver Group 1
Note: Replace all O-ring seals and gaskets. Apply a light film of hydraulic oil to all components
before assembly.
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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1. Install screw (65) in order to secure the piston.
2. Install spring (63) and cap (64) .
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Note: Use recorded distance (X) from the locknut to the end of the screw for installation
purposes.
3. Install screw (61) and dowel (62) .
4. Install plug (60) and the new O-ring seal.
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5. Install stem (58) into spool (59). Install clip (57).
6. Install valve assembly (56) and retaining ring (55) .
7. Install four new small O-ring seals (53) and one new large O-ring seal (54) .
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8. Install spring (51) and bushing (52) .
9. Install cover (49) and bolts (48). Tighten the bolts to a torque of 35 N·m (26 lb ft). Install
plastic cap (50) .
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10. Install new large O-ring seal (46). Install plug (47) and the new O-ring seal.
11. Install cover (45) and bolts (44). Tighten the bolts to a torque of 120 N·m (88 lb ft).
12. Install plugs (43) and the new O-ring seals.
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Caterpillar cat m312 excavator (prefix 6 tl) service repair manual (6tl00410 and up)

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Caterpillar cat m312 excavator (prefix 6 tl) service repair manual (6tl00410 and up)