Caterpillar Cat 318D2 L Excavator (Prefix TZS) Service Repair Manual (TZS00001 and up).pdf

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Product: EXCAVATOR
Model: 318D2 L EXCAVATOR TZS
Configuration: 318D2 L Excavator TZS00001-UP (MACHINE) POWERED BY 3054C Engine
Disassembly and Assembly
318D2 Excavator Machine Systems
Media Number -UENR0198-03 Publication Date -01/12/2014 Date Updated -27/06/2018
i07255515
Final Drive - Disassemble
SMCS - 4050-015
Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 477-3191 M14x2x18 mm Lifting Eye Assembly 2
B 1P-2420 Transmission Repair Stand 1
C
6V-8214 M6x20mm Bolt 2
9X-8267 M6 Washer 2
D 8H-0663 Bearing Puller Assembly 1
E 422-5474 M16x2x24mm Lifting Eye Assembly 2
F 439-3938 Link Bracket 3
G 1U-9889 Crossblock 1
Start By:
a. Remove the final drive and the travel motor assembly.
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
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https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis...

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.
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 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.
1. Thoroughly clean the outside of the final drive and travel motor prior to disassembly.
2. Remove the sprocket from the final drive and the travel motor assembly. The weight of the
sprocket is approximately 36 kg (79 lb).
Illustration 1 g06260984
3. Use Tooling (A) and a suitable lifting device to position final drive assembly (1) onto
Tooling (B). The weight of final drive assembly (1) is approximately 281 kg (620 lb).
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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.
4. Remove plug (2), spring (4), seat (3), and the O-ring seal.
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5. Remove plug (5), spring (6), seat (7), stem assembly (8), and the O-ring seal.
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6. Remove plug (9), spring (12), seat (11), spool (10), and the O-ring seal.
7. Remove adapter (13) and the O-ring seal.
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8. Remove plug (14), spring (16), valve (15), and the O-ring seal.
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9. Remove plug (17), spring (19), valve (18), and the O-ring seal.
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10. Remove plugs (20) and the O-ring seals.
11. Remove plugs (21), springs (23), valves (22), and the O-ring seals.
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12. Remove bolts (24) and valve body (25).
Port plate (28) may still be adhered to the barrel assembly.
13. Remove springs (26), port plate (28), and O-ring seals (27).
14. Remove bearing (29).
15. Remove O-ring seal (30).
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16. Use Tooling (C) and suitable prying devices to remove piston assembly (31).
17. Remove O-ring seal (32) and O-ring seal (33).
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18. Remove separator plates (34) and friction plates (35). Note the alternating order of separator
plates (34) and friction plates (35) for assembly purposes.
19. Remove barrel assembly (36). Do not allow the components of barrel assembly (36) to
come apart while you remove barrel assembly (36). The components of barrel assembly (36)
must be reinstalled in the original positions.
20. Remove piston assemblies (37) and retainer (38).
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Note: Mark the component locations for assembly purposes before you disassemble the
barrel assembly.
21. Remove guide (39).
22. Remove springs (40).
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23. Put location marks on swashplate (41) for assembly purposes. Remove swashplate (41).
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24. Remove shaft assembly (42), keys (44), piston (43), and spring (45).
25. Use a suitable press and Tooling (D) to remove bearing (46) off the shaft assembly.
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26. Use Tooling (E) and a suitable lifting device to remove final drive assembly (47) from
Tooling (B) and reposition final drive assembly (47) as shown. The weight of final drive
assembly (47) is approximately 240 kg (530 lb).
27. Remove drain plugs (48), bolts (49), and cover (50).
28. Use Tooling (F) and a suitable lifting device to remove carrier assembly (51). The weight of
carrier assembly (51) is approximately 27 kg (60 lb).
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29. Remove pins (53), planetary shafts (54), planetary gears (52), needle bearings (55), and
washers (56).
30. Remove sun gear (57).
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31. Remove sun gear (58).
32. Use Tooling (F) and a suitable lifting device to remove carrier assembly (59). The weight of
carrier assembly (59) is approximately 54 kg (120 lb).
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33. Remove pins (60), planetary shafts (62), planetary gears (61), needle bearings (63), and
washers (64).
34. Remove coupling (65).
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35. Use Tooling (F) and a suitable lifting device to remove final drive assembly (66) from
Tooling (B). The weight of final drive assembly (66) is approximately 154 kg (340 lb).
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36. Use Tooling (G) and a suitable press to remove washers (67).
37. Use Tooling (F) and a suitable lifting device to separate sprocket housing (68) and travel
motor housing (69). The weight of sprocket housing (68) is approximately 95 kg (210 lb).
The weight of travel motor housing (69) is approximately 59 kg (129 lb).
38. Remove duo cone seal (70).
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39. Remove bearing (71) and bearing (72).
40. Remove duo cone seal (73) and shim (74).
41. Remove lip seal (75).
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
Mon Nov 16 00:32:30 UTC+0800 2020
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Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 318D2 L EXCAVATOR TZS
Configuration: 318D2 L Excavator TZS00001-UP (MACHINE) POWERED BY 3054C Engine
Disassembly and Assembly
318D2 Excavator Machine Systems
Media Number -UENR0198-03 Publication Date -01/12/2014 Date Updated -27/06/2018
i05453369
Final Drive - Assemble
SMCS - 4050-016
Assembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1P-2420 Transmission Repair Stand 1
B 439-3938 Link Bracket 2
D 439-3940 Link Bracket 2
G 126-3994 Duo-Cone Seal Installer 1
H - Loctite C5-A Anti-Seize Lubricant
F - Loctite High Flex From-In-Place Gasket
Note: Cleanliness is an important factor. Before assembly, all parts should be 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. All disassembly and all
assembly procedures must be performed on a clean work surface and in a clean hydraulic
area. Keep cleaned parts covered and protected at all times.
Note: O-rings, gaskets, and seals should always be replaced. A used O-ring may not have
the same sealing properties as a new O-ring. Use 1U-6396 O-Ring Assembly Compound
during the assembly procedure.
Note: Apply a light film of hydraulic oil to all components before assembly.
1. Install the final drive sprocket if the sprocket was removed from the main housing.
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2. Refer to Disassembly and Assembly, "Final Drive Sprocket - Remove and Install".
3. Apply Tooling (H) to the outer diameter of the bearings.
4. Install bearings (32) and (33) in main housing (18) with a suitable press.
5. Make sure that bearing (32) and bearing (33) contact the counter bore in the main housing.
6. Use the following procedure to preload the bearings and determine the correct thickness of
shims.
a. Fasten Tooling (D) and a suitable lifting device to main housing (18). Install the main
housing on the motor housing.
b. Put the main housing and the motor housing in a suitable press.
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(a) Bearing surface
(b) Housing surface
c. Use a suitable press and a spacer in order to apply a load of 4000 kg (8819 lb) on the
bearings. Rotate the housing in order to seat the bearings.
d. Reduce the load on the bearings to 1000 ± 100 kg (2205 ± 221 lb).
e. Use a depth micrometer in order to measure the step length between the bearing
surface and the housing surface. Take measurements at several different locations
around the housing. Compute the average of the measured dimensions and record the
number. Call this Dimension (Y).
f. Use a depth micrometer in order to measure the step length of gear (26). Take
measurements at several different locations around the gear. Compute the average of
the measured dimensions and record the number. Call this Dimension (X).
g. The thickness of the shims is equal to (X − Y) ± 0.05 mm (0.002 inch).
Note: Use no more than two shims. If two shims are required, install the thinner shim
next to the gear.
h. Remove the main housing from the motor housing.
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7. Use Tooling (G) in order to install Duo-Cone seal (31) in main housing (18). Refer to
Disassembly and Assembly, "Duo-Cone Conventional Seals - Install".
Note: The rubber seals and all surfaces that contact the seals must be clean and dry. After
installation of the seals, put clean SAE 30 oil on the contact surfaces of the metal seals.
8. Use Tooling (G) in order to install Duo-Cone seal (29) in motor housing (28).
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9. Apply Tooling (H) to the surfaces that contact pins (30).
10. Install alignment pins (30).
Note: Do not damage the Duo-Cone seals in the main housing or in the motor housing
during the assembly of the two components. After installation of the main housing on the
motor housing, there will be a small gap between the components. The gap is caused by the
Duo-Cone seals. This gap will be eliminated during installation of gear (26).
11. Fasten Tooling (D) and a suitable lifting device to main housing (18). Install the main
housing on the motor housing.
12. Install shims (27) that were determined in Step 6.g in the main housing.
Note: If two shims are required, install the thinner shim next to the gear.
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13. Install gear (26).
14. Install bolts (25) in gear (26). Install the bolts in an even pattern until the gear is seated
against the bearing. Tighten bolts (25) in a crisscross pattern.
15. Install O-ring seal (24) to main housing (18).
16. Assemble carrier assembly (15), as follows.
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Caterpillar Cat 318D2 L Excavator (Prefix TZS) Service Repair Manual (TZS00001 and up).pdf

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Caterpillar Cat 318D2 L Excavator (Prefix TZS) Service Repair Manual (TZS00001 and up).pdf