Caterpillar cat 320 c excavator (prefix gla) service repair manual (gla00001 and up)

Service Repair Manual
Model
320C, 320C L 320CL, 320C LN
320CLN Excavator

Shutdown SIS
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Product: EXCAVATOR
Model: 320C EXCAVATOR GLA
Configuration: 320C, 320C L, 320C LN Excavators GLA00001-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
i01972529
Swing Motor - Install
SMCS - 5058-012-ZW
Installation Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A FT-2674 Vacuum Cap 1
B 138-7573 Link Bracket 2
C 1U-8846 Gasket Sealant
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.
1. Prior to the installation of the swing motor, make sure that the mating surfaces of the swing
motor and the swing drive are thoroughly clean and dry.
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2019/9/21https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sisw...

2. Apply Tooling (C) on the mating surface of the swing motor and the swing drive housing.
Illustration 1 g00694494
3. Attach Tooling (B) and a suitable lifting device to swing motor (23). The weight of swing
motor (23) is approximately 55 kg (120 lb).
4. Install the washers and bolts (20).
5. Tighten bolts (20) to a torque of 240 ± 40 N·m (177 ± 30 lb ft).
6. Install anti-reaction valve (22). Install the washers and bolts (21). Tighten bolts (21) to a
torque of 55 ± 10 N·m (40 ± 7 lb ft).
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7. Remove the cap to the hydraulic tank. Attach Tooling (A) to the hydraulic tank.
Note: Hook up the air to Tooling (A) in order to create a vacuum in the hydraulic system.
This will minimize the leakage from the hose assemblies.
Note: Replace the O-ring seals that are used in the ends of the hose assemblies.
8. Connect hose assembly (19).
10. Install the split flanges, the washers and bolts (15).
13. Install the split flanges, the washers, and bolts (14).
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16. Connect harness assembly (18).
17. Install the clip, the washer, and bolt (17).
Typical example
18. Connect hose assembly (7) (If Equipped).
19. Install hose assembly (6) (If Equipped).
20. Install brace (8) with washers and bolts (9) (If Equipped).
21. Make sure that the drain valve (5) is closed.
22. Remove Tooling (A) and install the cap to the hydraulic tank.
NOTICE
To avoid system damage, make sure that the hydraulic motor is
properly filled with hydraulic oil before start-up.
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23. 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.
24. Fill the hydraulic oil tank and the swing drive with clean hydraulic oil to the correct level.
Reference: Refer to Operation and Maintenance Manual, "Lubricant Viscosities" for the
proper oil viscosity.
Reference: Refer to Operation and Maintenance Manual, "Hydraulic System Oil Level -
Check" and Operation and Maintenance Manual, "Swing Drive Oil Level - Check" for the
correct filling procedures.
25. Start the engine, and check the operation of the swing drive. Also, check for leaks. Stop the
engine.
26. Obtain a hydraulic oil sample from the main S·O·S port.
Reference: Refer to Operation and Maintenance Manual, "Sampling Interval and Location
of Sampling Valve" for the correct location.
27. If the S·O·S sample exceeds ISO 18/15, flush the hydraulic system.
Reference: Refer to Contamination Control Guidelines, SEBF8436, "Hydraulic System
Flushing Procedure for 320C Hydraulic Excavators" for further information.
28. Install the washers and bolts (4) in order to install access cover (3) that is under the main
control valve.
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29. Install the washers and bolts (1) in order to install cover (2).
Copyright 1993 - 2019 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Sat Sep 21 23:45:39 UTC+0800 2019
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Product: EXCAVATOR
i01972334
Swing Drive - Remove
SMCS - 5459-011
Removal Procedure
Table 1
Required Tools
A 138-7574 Link Bracket 2
B Forcing Screw (20 mm X 100 mm) 2
Start By:
a. Remove the swing motor. Refer to Disassembly and Assembly, "Swing Motor - Remove" in
this manual.
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.
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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.
1. Thoroughly clean the area around the swing drive prior to removal.
2. Put identification marks on the swing drive in order to mark the drive's location for
installation purposes.
Note: It may be necessary to remove the drain hose for the swing drive in order to access
the mount bolts in the rear of the drive.
3. Remove bolts (1) and the washers that secure the swing drive to the main frame.
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4. Attach Tooling (A) and a suitable lifting device to swing drive (2), as shown.
5. Remove corks (3) from the threaded holes in the swing drive housing.
6. Install Tooling (B) in each threaded hole in the swing drive housing.
7. Slowly tighten one forcing screw for no more than two turns, and then tighten the other
forcing screw for no more than two turns. At the same time keep tension on the swing drive
with the hoist. Tighten the forcing screws evenly in this manner in order to separate the
swing drive from the main frame.
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8. Remove swing drive (5) from the machine. The weight of swing drive (5) is approximately
190 kg (420 lb).
Sat Sep 21 23:46:36 UTC+0800 2019
4/4(W)w

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Product: EXCAVATOR
i01916277
Swing Drive - Disassemble
SMCS - 5459-015
Disassembly Procedure
Table 1
Required Tools
A
5P-5197 Retaining Ring Pliers 1
1U-8759 Tip Set 1
B 1P-0520 Driver Group 1
Start By:
a. Remove the swing drive. Refer to Disassembly and Assembly, "Swing Drive - Remove" for
the machine that is being serviced.
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.
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
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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. Remove sun gear (1) from carrier assembly (2).
2. Remove spacer (3) from the carrier assembly.
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3. Remove carrier assembly (2) from ring gear (4).
4. Drive roll pin (5) into shaft (6). Remove shaft (6) and the gear assembly from the carrier
assembly.
5. Disassemble the gear assembly, as follows: washer (7), gear (8), bearing (9), and washer
(10). Remove roll pin (5) from shaft (6).
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6. Repeat Step 4 through Step 5 for the remaining gear assemblies.
7. Remove retaining ring (11) from sun gear (12). Remove carrier (13) from the sun gear.
8. Remove retaining ring (14) from the sun gear.
9. Use two people in order to remove ring gear (15) from housing (16). Weight of ring gear
(15) is approximately 29 kg (65 lb).
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10. Remove spacer (17) from carrier assembly (18).
11. Use Tooling (A) to remove retaining ring (19).
12. Remove carrier assembly (18) from the housing.
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13. Drive roll pin (20) into shaft (21). Remove shaft (21) and the gear assembly from the carrier
assembly.
14. Disassemble the gear assembly, as follows: washer (22), bearing (23), gear (24), bearing
(25), and washer (26). Remove roll pin (20) from shaft (21).
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16. Remove four bolts (27) from the housing.
Note: Do not remove the other two bolts (27) at this time. These two bolts (27) will be used
to transport the assembly to the press.
17. Remove remaining bolts (27). Use a suitable press in order to remove shaft (28) from the
housing. Remove cage (29) from the housing.
Note: The bearing may come off with the pinion or the bearing may stay in the housing.
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18. Remove O-ring seal (30) from the cage. Remove lip type seals (31) from the cage.
19. Use a suitable press and Tooling (B) in order to remove bearing (34), spacer (33), and
bearing (32) from the housing. Remove alignment pin (35) from the housing.
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20. Remove drain valve (36) from the housing.
Sat Sep 21 23:47:31 UTC+0800 2019
9/9(W)w

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Product: EXCAVATOR
i02015036
Swing Drive - Assemble
SMCS - 5459-016
Assembly Procedure
Table 1
Required Tools
A 138-7574 Link Bracket 2
B
5P-5197 Retaining Ring Pliers 1
1U-8759 Tip Set 1
C Threaded Guide Stud (M16×2.00×140mm) 2
D 1U-6396 O-Ring Assembly Compound
E 4C-9613 Silicone Sealant
F 5P-3931 Anti-Seize Compound
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 Tooling (D) during the assembly procedure.
Note: Apply a light film of hydraulic oil to all components before assembly.
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1. Install drain valve (36) into the housing.
2. Install O-ring seal (30) into the cage. Install lip type seals (31) into the cage.
3. Install cage (29) onto shaft (28).
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4. Raise the temperature of bearing (32) to 135 °C (275 °F). Install bearing (32) onto shaft
(28).
5. Install spacer (33) onto shaft (28). Install spacer (33) with relief against bearing (32).
6. Raise the temperature of bearing (34) to 135 °C (275 °F). Install bearing (34) onto shaft (28)
against spacer (33).
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7. Place shaft assembly (28) onto a flat surface. Install Tooling (A) and a suitable lifting device
onto housing (16). Apply Tooling (E) to the face of cage (29). Apply Tooling (F) to the
inside diameters of the housing. Raise the temperature of housing (16) to 93 °C (200 °F).
Use a suitable lifting device and lower the housing onto the shaft assembly.
8. Install bolts (27) into the housing. Install alignment pin (35) into the housing.
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9. Assemble the gear assembly, as follows: washer (22), bearing (23), gear (24), bearing (25),
and washer (26).
10. Use a deburring tool in order to remove the metal burr from the openings in the carrier.
Install shaft (21) and the gear assembly into the carrier assembly. Drive roll pin (20) into
shaft (21). Orient the split in roll pin (20) vertically to the carrier. Align the split in the roll
pin to the top or to the bottom. Make a stake mark on each side of the roll pin hole in the
carrier. Each stake mark should be approximately 2.25 ± 0.75 mm (0.09 ± 0.03 inch) from
the outside diameter of the roll pin hole.
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12. Install carrier assembly (18) into the housing.
13. Use Tooling (B) to install retaining ring (19).
14. Install spacer (17) into carrier assembly (18).
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15. Apply Tooling (E) to the face of housing (16). Install Tooling (C) in order to help align the
housing and the ring gear. Use two people in order to install ring gear (15) onto housing
(16). Weight of ring gear (15) is approximately 29 kg (65 lb).
16. Install retaining ring (14) into the sun gear.
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17. Install carrier (13) into the sun gear. Install retaining ring (11) into sun gear (12).
18. Assemble the gear assembly, as follows: washer (7), gear (8), bearing (9), and washer (10).
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19. Use a deburring tool in order to remove the metal burr from the openings in the carrier.
Install shaft (6) and the gear assembly into the carrier assembly. Drive roll pin (5) into shaft
(6). Orient the split in roll pin (5) vertically to the carrier. Align the split in the roll pin to the
top or to the bottom. Make a stake mark on each side of the roll pin hole in the carrier. Each
stake mark should be approximately 2.25 ± 0.75 mm (0.09 ± 0.03 inch) from the outside
diameter of the roll pin hole.
21. Install carrier assembly (2) into ring gear (4).
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Caterpillar cat 320 c excavator (prefix gla) service repair manual (gla00001 and up)

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