Caterpillar Cat 318D2 L Excavator (Prefix WGR) Service Repair Manual (WGR00001 and up).pdf

Service Repair Manual
Models
318D2 L Excavator

Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 318D2 L EXCAVATOR WGR
Configuration: 318D2 L Excavator WGR00001-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
i05453130
Final Drive - Disassemble
SMCS - 4050-015
Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1P-2420 Transmission Repair Stand 1
B 439-3938 Link Bracket 2
C 154-6181 Forcing Bolt 1
D 439-3940 Link Bracket 2
E
5F-7366 Forcing Bolt 1
1P-5546 Crossblock 1
1U-9889 Crossblock 1
1P-0520 Driver Group 1
6V-7888 Puller Leg 2
1H-3112 Puller Assembly 1
1P-5551 Adjustable Screw Assembly 1
F - Loctite 5127 1
Start By:
a. Remove the final drive.
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Note: Cleanliness is an important factor. Before the disassembly procedure, thoroughly
clean the exterior of the component. This action will prevent dirt from entering the internal
mechanism.
1. Put an alignment mark across the sections of the final drive for assembly purposes. The
parts must be reinstalled in the original locations.
Illustration 1 g00708089
2. Fasten the final drive to Tooling (A), as shown. The combined weight of the final drive and
final drive sprocket is approximately 312 kg (688 lb).
3. Remove bolts (1) and the washers that hold the cover in position.
4. Remove the setscrews from cover (2), and fasten Tooling (B) and a suitable lifting device to
cover (2), as shown. The weight of cover (2) is approximately 32 kg (70 lb). Remove cover
(2).
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5. Remove thrust plate (3) from cover (2).
6. Remove plugs (4) from cover (2).
7. Remove O-ring seals (5) from both plugs (4) that were in the cover.
8. Remove spacer (6) from carrier assembly (7).
9. Remove sun gear (8) from carrier assembly (7).
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10. Remove carrier assembly (7) by lifting the carrier assembly straight up. The weight of
carrier assembly (7) is approximately 14 kg (30 lb).
11. Disassemble carrier assembly (7), as follows.
a. Drive spring pin (10) into planetary shaft (9) with a hammer and a punch.
b. Remove planetary shaft (9) with spring pin (10) from the carrier assembly.
c. Remove spring pin (10) from planetary shaft (9) with a hammer and a punch.
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d. Remove thrust washers (11) and planetary gear (13) from the carrier assembly.
e. Remove bearing (12) from planetary gear (13).
12. Repeat Steps 11.a through 11.e in order to remove the remaining planetary gears from the
carrier assembly.
13. Remove sun gear (14) from carrier assembly (15).
14. Remove spacer (16).
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Note: It will be necessary to pry ring gears (17) away from main housing (18) in order to
install the lifting slings.
15. Fasten a suitable lifting device to ring gears (17), as shown. Remove the ring gears from
main housing (18). The weight of ring gears (17) is approximately 45 kg (100 lb).
16. Use a screwdriver or a chisel in order to separate two ring gears (17).
Note: Two ring gears (17) are held together with Tooling (F). It may be necessary to heat
ring gears (17) in order to soften the sealant. Do not heat over 135 °C (275 °F) for more
than thirty minutes.
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17. Position a 12.7 mm (0.50 inch) shackle under carrier assembly (15).
18. Fasten a suitable lifting device to the shackle.
19. Slowly lift carrier assembly (15) from the final drive. The weight of carrier assembly (15) is
approximately 39 kg (85 lb).
20. Disassemble carrier assembly (15), as follows.
a. Drive spring pin (20) into planetary shaft (19) with a hammer and a punch.
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b. Remove planetary shaft (19) with spring pin (20) from the carrier assembly.
c. Remove spring pin (20) from planetary shaft (19) with a hammer and a punch.
d. Remove thrust washers (21) and planetary gear (23) from the carrier assembly.
e. Remove bearings (22) from planetary gear (23).
21. Repeat Steps 20.a through 20.e in order to remove the remaining planetary gears from the
carrier.
22. Remove O-ring seal (24) from main housing (18).
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23. Remove bolts (25) from gear (26).
24. Use Tooling (C) in order to remove gear (26) from main housing (18).
Note: The motor housing will separate from main housing (18) once gear (26) is removed.
Make sure that the motor housing is supported.
25. Remove shims (27) from the main housing.
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26. Fasten Tooling (D) and a suitable lifting device to main housing (18), as shown.
27. Use a hammer and a punch in order to separate main housing (18) and the final drive
sprocket from motor housing (28). The combined weight of main housing (18) and the final
drive sprocket is approximately 82 kg (180 lb).
28. Remove Duo-Cone seal (29) from motor housing (28).
29. Remove alignment pins (30).
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30. Remove Duo-Cone seal (31) from main housing (18).
31. Use Tooling (E) in order to remove bearings (32) and (33) from the main housing.
32. If necessary, remove the final drive sprocket from the main housing.
33. Refer to Disassembly and Assembly, "Final Drive Sprocket - Remove and Install".
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
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Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 318D2 L EXCAVATOR WGR
Configuration: 318D2 L Excavator WGR00001-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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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).
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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Caterpillar Cat 318D2 L Excavator (Prefix WGR) Service Repair Manual (WGR00001 and up).pdf

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