Caterpillar cat 320 c excavator (prefix jtg) service repair manual (jtg00001 and up)

Service Repair Manual
Models
320C, 320C L, 320C LN
Excavator

Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 320C EXCAVATOR JTG
Configuration: 320C, 320C L, 320C LN Excavators JTG00001-UP (MACHINE) POWERED BY 3066 Engine
Disassembly and Assembly
320C Excavator Machine Systems
Media Number -RENR3826-16 Publication Date -01/11/2014 Date Updated -30/03/2016
i02334471
Counterbalance Valve (Travel) - Install
SMCS - 5111; 5811-012-KV
Installation Procedure
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.
Dispose of all fluids according to local regulations and mandates.
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.
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2019/10/28https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sis...

Clean the hydraulic system properly after any major component
exchange or especially after a component failure, to remove any
contamination.
Illustration 1 g00651063
1. Install new O-ring seals (5) and (6).
2. Position counterbalance valve (1) on the travel motor.
3. Install bolts (2). Tighten bolts (2) to a torque of 80 ± 8 N·m (59 ± 6 lb ft).
Note: Replace the O-ring face seals in the hose assemblies.
4. Install the split flanges and bolts (3) in order to connect hose assemblies (4).
5. Install high efficiency filters in place of the pilot filter, the case drain filter, and the return
filter.
Note: High efficiency filters should not be run for more than 250 hours before you change
back to the standard filters.
6. Check the hydraulic oil level.
2/3(W)w

Reference: Refer to Operation and Maintenance Manual, "Hyrdaulic System Oil Level -
Check" for the correct filling procedure.
End By:
a. Install the travel motor guard. Refer to Disassembly and Assembly, "Travel Motor Guard -
Remove and Install".
Copyright 1993 - 2019 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Mon Oct 28 13:14:15 UTC+0800 2019
3/3(W)w

Shutdown SIS
Previous Screen
Product: EXCAVATOR
i03524303
Travel Motor - Remove
SMCS - 4351-011
Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 9U-7692 Threaded RodM16x381 mm 15 inch 2
Start By:
A. Remove the counterbalance valve. Refer to Disassembly and Assembly, "Counterbalance
Valve (Travel) - Remove".
NOTICE
performance of inspection, maintenance, testing, adjusting and repair
containing fluids.
Refer to Special Publication, NENG2500, "Caterpillar Dealer Service
Tool Catalog" for tools and supplies suitable to collect and contain
fluids on Caterpillar products.
1/3(W)w

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.
1. Drain the oil from the final drive into a suitable container for storage or disposal.
2. Disconnect hose assemblies (1) and (3) . Remove two bolts (2) .
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3. Install Tooling (A) in the place of bolts (2) .
4. Remove remaining bolt (2A) that secures travel motor (4) to the final drive.
5. Attach a suitable lifting device to travel motor (4) . The weight of travel motor (4) is
approximately 57 kg (125 lb). Carefully pull travel motor (4) out of the final drive.
6. Remove O-ring seal (5) from the travel motor.
Mon Oct 28 13:15:11 UTC+0800 2019
3/3(W)w

Shutdown SIS
Previous Screen
Product: EXCAVATOR
i01959727
Travel Motor - Disassemble
SMCS - 4351-015
Disassembly Procedure
Table 1
Required Tools
A 138-7575 Link Bracket 2
B 1P-0074 Slide Hammer 1
C 9S-9152 Bearing Puller 1
D
1U-9895 Crossblock 1
3H-0465 Push-Puller Plate 2
8T-0649 Bolt 2
9X-8257 Washer 2
E 5P-0975 Plate 1
Start By:
a. Remove the piston motor (travel). Refer to Disassembly and Assembly, "Piston Motor
(Travel) - Remove".
NOTICE
performance of inspection, maintenance, testing, adjusting, and repair
1/12(W)w

containing fluids.
Refer to Special Publication, NENG2500, "Dealer Service Tool
Catalog" for tools and supplies suitable to collect and contain fluids on
Cat®
products.
Note: Put identification marks on the motor and on all hose assemblies for installation purposes
and for the purpose of orientation. Plug all hose assemblies. This will help to prevent fluid loss
and this helps to keep contaminants from entering the system.
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.
1. Remove bolts (1).
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2. Remove bolts (2) from the traction control valve in order to install Tooling (A).
3. Remove traction control valve (3) and travel motor (4) from the final drive.
4. Remove Tooling (A). Remove four bolts (2). Remove traction control valve (3).
5. Remove socket head bolts (5). Remove O-ring seal (6) and O-ring seals (7). Remove head
(8).
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6. Remove shim (9).
7. Remove bearing (10).
8. Remove plugs (11) and the O-ring seals.
4/12(W)w

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.
9. Remove adapter (14) and the O-ring seal. Remove spool (13) and spring (12) from head (8).
10. Remove washer set (15).
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11. Remove port plate (16).
12. Remove three small O-ring seals (17). Install Tooling (D) and Tooling (E), as shown.
Tooling (E) provides a protective cover for the barrel assembly. Tooling (E) prevents
Tooling (D) from damaging the surface of the barrel assembly.
6/12(W)w

13. Retain piston (18) with Tooling (D) and apply approximately 517 kPa (75 psi) of shop air
pressure to brake release port (Y). Brake piston (18) will move out of the piston guide.
Remove brake piston (18) from the main housing.
14. Remove O-ring seal (19) and the backup ring and remove O-ring seal (20) and the backup
ring.
15. Remove piston guide (21). Remove O-ring seal (22).
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16. Remove O-ring seal (23) and backup ring (24).
17. Lay the travel motor housing on one side in order to remove rotating group (25) and brake
pack (26) as a unit.
18. Remove brake pack (26).
8/12(W)w

NOTICE
In order to ensure that each piston assembly is installed into its original
bore, identify and mark each piston assembly, retaining plate and the
barrel before removing the piston assembly.
To avoid damage to the barrel assembly parts, do not allow the parts to
separate from the assembly during removal or installation.
19. Remove pistons (27) and retainer plate (28) from barrel (29) as a unit. Separate the pistons
from the retainer plate.
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.
20. Remove guide (30), spacer (31), and nine springs (32) from the barrel.
9/12(W)w

21. Remove swashplate (33).
22. Use a magnet in order to remove keys (34) and pistons (35).
23. Use a magnet in order to remove pins (36).
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24. Remove shaft assembly (37). Remove plugs (38) and the O-ring seals.
25. Use Tooling (B) in order to remove seal (39).
26. Remove retaining rings (40) from each side of the bearing.
11/12(W)w

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27. Use a suitable press in order to remove bearing assembly (41) from shaft (42).
28. Use a suitable press and Tooling (C) in order to remove inner race (43) from shaft (42).
Mon Oct 28 13:16:07 UTC+0800 2019
12/12(W)w

Shutdown SIS
Previous Screen
Product: EXCAVATOR
i01959745
Travel Motor - Assemble
SMCS - 4351-016
Assembly Procedure
Table 1
Required Tools
A 138-7575 Link Bracket 2
F 1P-0510 Driver Group 1
G 206-3689 Turning Tool 1
H 5P-0960 Molybdenum Grease 1
Note: Replace all O-ring seals and gaskets. Apply a light film of "10W" 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.
1/13(W)w

1. Raise the temperature of inner race (43). Lower the temperature of shaft (42). Use a soft
hammer in order to install inner race (43) on shaft (42).
2. Raise the temperature of bearing assembly (41). Lower the temperature of shaft (42). Install
bearing assembly (41) on shaft (42).
3. Install retaining rings (40) on each side of the bearing.
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4. Use Tooling (F) in order to install seal (39).
5. Use a soft hammer in order to install shaft assembly (37).
6. Install plugs (38) and the O-ring seals. Tighten plugs (38) to a torque of 140 ± 14 N·m
(103 ± 10 lb ft).
3/13(W)w

Caterpillar cat 320 c excavator (prefix jtg) service repair manual (jtg00001 and up)

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