Caterpillar Cat 336D LN Excavator (Prefix MYG) Service Repair Manual (MYG00001 and up).pdf

Service Repair Manual
Models
336D L and 336D LN Excavator

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Product: EXCAVATOR
Model: 336D LN EXCAVATOR MYG
Configuration: 336D L & 336D LN Excavators MYG00001-UP (MACHINE) POWERED BY C9 Engine
Disassembly and Assembly
330D, 336D, 336D2, 340D and 340D2 Excavators and 336D MHPU Mobile Hydraulic
Power Unit Machine Systems
Media Number -RENR8648-30 Publication Date -01/03/2015 Date Updated -15/08/2018
i02553557
Swing Motor - Disassemble
SMCS - 5058-015-ZW
Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A
1U-7506 Adapter Kit 1
8T-4244 Nut 6
8T-4223 Hard Washer 6
- Threaded Rod M12 by 1.75 by 150mm 1
B
6V-7887 Puller Leg 2
5F-7344 Puller Block 1
1P-0074 Slide Hammer Puller Gp 1
5P-4750 Adjusting Screw 1
C
8T-0651 Bolt 2
8T-4167 Hard Washer 2
D 1P-1853 Retaining Ring Pliers 1
E
9S-9152 Bearing Puller Gp 1
1P-0510 Driver Gp 1
Start By:
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336D L & 336D LN Excavators MYG00001-UP (MACHINE) POWERED BY C9 En...
2020/8/20
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a. Remove the swing motor. Refer to Disassembly and Assembly, "Swing Motor - Remove".
Note: Cleanliness is an important factor. Before the disassembly procedure, the exterior of the
component should be thoroughly cleaned. This will prevent dirt from entering the internal
mechanism.
Note: If a failure occurs, an accurate diagnosis of the cause can prevent a recurrence. Information
is available to analyze failures for piston motors. Refer to Special Publication, SEBD0641,
"Analyzing Axial Piston Pump and Motor Failures".
Note: Inspect all parts. If any parts are worn or damaged use new parts for replacement. The
installation of used parts during reconditioning is acceptable. Reuse and salvage information is
available on piston motors. Refer to Guideline For Reusable Parts and Salvage Operations,
SEBF8032, "Piston Pumps and Motors". During reconditioning, correct any conditions that might
have caused the original failure.
NOTICE
Keep all parts clean from contaminants.
Contamination of the hydraulic system with foreign material will
reduce the service life of the hydraulic system components.
To prevent contaminants from entering the hydraulic system, always
plug or cap the lines, fittings, or hoses as they are disconnected. Cover
any disassembled components and clean them properly before
assembly.
Clean the hydraulic system properly after any major component
exchange or especially after a component failure, to remove any
contamination.
Illustration 1 g00877535
1. Use a suitable lifting device to position swing motor (1) onto Tooling (A). The weight of
swing motor (1) is approximately 77 kg (170 lb). Install swing motor (1) to Tooling (A).
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2. Remove bolts (2). Remove anti-reaction valve (3) from the head.
3. Remove relief valves (4) from the head.
3/12
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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 O-ring seals (6), (8), and (9). Remove backup rings (5) and (7).
5. Remove bolts 10.
6. Remove head (11) from the motor housing.
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7. Remove plate (12) and O-ring seal (13).
8. Install Tooling (B) and remove bearing (14).
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9. Remove plug (15) and the O-ring seal.
10. Remove spring (17) and valve (16).
11. Remove springs (18).
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12. Install Tooling (C). Apply air pressure in order to unseat the piston.
Note: Use air pressure in order to avoid damage to the piston.
13. Remove piston (19).
14. Remove steel plates (20). Remove plates (21).
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15. Remove barrel (22) and the pistons as an assembly.
16. Mark pistons (23).
17. Remove pistons (23) from barrel (22).
18. Remove pistons (23) from plates (24) and (25).
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19. Separate plates (24) and (25).
20. Use Tooling (D) in order to remove retaining ring (26).
21. Remove plate (28) and shaft (29) from housing (27).
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22. Remove bearing race (30) from shaft (29).
23. Install Tooling (E). Remove bearing race (31) from shaft (29).
10/12
336D L & 336D LN Excavators MYG00001-UP (MACHINE) POWERED BY C9 ...
2020/8/20

24. Remove O-ring seal (32) from housing (27).
25. Install Tooling (B). Remove bearing (33) from housing (27).
11/12
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26. Remove seal (34) from the housing.
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All Rights Reserved.
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Thu Aug 20 16:50:53 UTC+0800 2020
12/12
2020/8/20

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Product: EXCAVATOR
i02554256
Swing Motor - Assemble
SMCS - 5058-016
Assembly Procedure
Table 1
Required Tools
D 1P-1853 Retaining Ring Pliers 1
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. 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.
Note: If a failure occurs, an accurate diagnosis of the cause can prevent a recurrence. Information
is available to analyze failures for piston pumps and motors. Refer to Special Publication,
SEBD0641, "Analyzing Axial Piston Pump and Motor Failures".
Note: Inspect all parts. If any parts are worn or damaged use new parts for replacement. The
installation of used parts during reconditioning is acceptable. Reuse and salvage information is
available on piston pumps. Refer to Guideline For Reusable Parts and Salvage Operations,
SEBF8032, "Piston Pumps and Motors". During reconditioning, correct any conditions that might
have caused the original failure.
1/10
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1. Install seal (34) into the housing.
2. Lower the temperature of bearing (33).
3. Install bearing (33) into the housing.
4. Install O-ring seal (32) into housing (27).
2/10
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5. Raise the temperature of bearing race (31). Install bearing (31) onto the shaft.
6. Raise the temperature of bearing race (30). Install bearing (30) onto shaft (29).
7. Install shaft (29) and plate (28) into housing (27).
3/10
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8. Use Tooling (D) in order to install retaining ring (26).
9. Reassemble plates (24) and (25).
10. Install pistons (23) into plates (24) and (25).
4/10
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11. Install pistons (23) into barrel (22).
12. Install barrel (22) and the pistons as an assembly.
13. Install steel plates (20). Install plates (21).
5/10
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14. Install piston (19).
15. Install springs (18).
16. Install valve (16) and spring (17).
6/10
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Improper assembly of parts that are spring loaded can cause bodily
injury.
To prevent possible injury, follow the established assembly procedure
and wear protective equipment.
17. Install the O-ring seal and plug (15).
18. Lower the temperature of bearing (14). Install bearing (14).
19. Install O-ring seal (13) and plate (12).
7/10
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injury.
20. Position head (11) onto the motor housing.
21. Install bolts (10).
22. Tighten bolts (10) to a torque of 431 ± 43 N·m (318 ± 32 lb ft).
8/10
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injury.
23. Install backup up rings (5) and (7). Install O-ring seals (6), (8), and (9).
24. Install relief valves (4) into the head.
25. Tighten relief valves (4) to a torque of 177 N·m (130 lb ft).
26. Position anti-reaction valve (3) onto the head. Install bolts (2).
9/10
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27. Use a suitable lifting device to remove swing motor (1) from Tooling (A). The weight of
swing motor (1) is approximately 77 kg (170 lb).
End By:
a. Install the swing motor. Refer to Disassembly and Assembly, "Swing Motor - Install".
Thu Aug 20 16:51:49 UTC+0800 2020
10/10
2020/8/20

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Product: EXCAVATOR
i02460276
Swing Motor - Install
SMCS - 5058-012-ZW
Installation Procedure
Table 1
Required Tools
A 138-7574 Link Bracket 2
1/3
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1. Attach Tooling (A) and a suitable lifting device to swing motor (12). The weight of swing
motor (12) is approximately 77 kg (170 lb). Install swing motor (12). Install bolts (13).
2. Connect harness assembly (11). Install bolts (10). Connect hose assemblies (8) and (9) .
3. Connect hose assemblies (6) and (7). Tighten hose assemblies (6) and (7) to a torque of 76 ±
4 N·m (56 ± 3 lb ft).
2/3
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4. Connect hose assemblies (1), (2), (3), (4), and (5). Tighten hose assemblies (1) and (5) to a
torque of 150 ± 15 N·m (110 ± 12 lb ft). Tighten hose assemblies (2), (3), and (4) to a
torque of 190 ± 20 N·m (140 ± 15 lb ft).
Thu Aug 20 16:52:45 UTC+0800 2020
3/3
2020/8/20

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Product: EXCAVATOR
i02460196
Swing Drive - Remove
SMCS - 5459-011
Removal Procedure
Table 1
Required Tools
A
132-8223 110 volt Power Pack 1
1U-6221 Torque Wrench 1
132-8143 36 mm Hex Link 1
B 138-7574 Link Bracket 4
C -
Forcing Bolt
M24 x 3 by 5 inch
2
Start By:
A. Remove the swing motor. Refer to Disassembly and Assembly, "Swing Motor - Remove".
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.
1/3
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Refer to Special Publication, NENG2500, "Caterpillar Dealer Service
Tool Catalog" for tools and supplies suitable to collect and contain
fluids on Caterpillar products.
Dispose of all fluids according to local regulations and mandates.
1. Lower the bucket to the ground.
2. Thoroughly clean the area around the swing drive prior to removal.
3. Drain the oil from the swing drive. Refer to Operation and Maintenance Manual, "Swing
Drive Oil - Change".
4. Use Tooling (A) to remove bolts (1) that secure the swing drive to the main frame.
5. Attach Tooling (B) and a suitable lifting device to swing drive (2), as shown. The weight of
swing drive (2) is approximately 510 kg (1125 lb).
2/3
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6. Remove the two corks from the threaded holes in the swing drive housing. Install Tooling
(C) in order to separate the swing drive (2) .
7. Remove swing drive (2) from the machine. The weight of swing drive (2) is approximately
510 kg (1125 lb).
Note: Be careful not to damage pinion gear.
Thu Aug 20 16:53:42 UTC+0800 2020
3/3
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Product: EXCAVATOR
i06560081
Swing Drive - Disassemble
SMCS - 5459-015
Disassembly Procedure
Table 1
Required Tools
A 138-7573 Link Bracket 2
B 1U-8221 Nylon Sling 1
C 5P-5197 Pliers 1
Start By:
a. Remove the swing drive. Refer to Disassembly and Assembly, "Swing Drive - Remove"
.
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, "Dealer Service Tool
Catalog" for tools and supplies suitable to collect and contain fluids on
Cat®
products.
1/8
2020/8/20

Dispose of all fluids according to local regulations and mandates.
1. Position the swing drive on suitable cribbing, as shown. The weight of the swing drive is
approximately 281 kg (620 lb).
2. Put an alignment mark on the cover and the housing of the swing drive for assembly
purposes.
3. Remove bolts (1) and cover (2).
4. Install Tooling (A) to cover (2).
5. Use a suitable lifting device and Tooling (A) to remove cover (2) from the ring gear of the
swing drive.
2/8
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6. Use two people to remove carrier assembly (3). The weight of the carrier assembly is
approximately 23 kg (50 lb).
7. Use the following procedure to disassemble carrier assembly (3).
a. Remove sun gear (4) from carrier assembly (3).
b. Drive spring pin (6) into planetary shaft (5) with a hammer and a punch.
3/8
2020/8/20

Caterpillar Cat 336D LN Excavator (Prefix MYG) Service Repair Manual (MYG00001 and up).pdf

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Caterpillar Cat 336D LN Excavator (Prefix MYG) Service Repair Manual (MYG00001 and up).pdf