Caterpillar Cat 320C Excavator (Prefix BBL) Service Repair Manual (BBL00001 and up).pdf

Service Repair Manual
Model
320C, 320C L, 320C LN,
320C S Excavator

Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 320C EXCAVATOR BBL
Configuration: 320C, 320C L, 320C LN, 320C S Excavators BBL00001-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
i01525672
Control Valve (Auxiliary) - Install - F1 and F4 Auxiliary
Control Valves
SMCS - 5051-012-AX
Installation Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
(A) FT-2674 Vacuum Cap 1
(B) 138-7573 Link Bracket 1
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. Install two hose assemblies on the bottom of the (F4) auxiliary control valve.
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https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sis...

Illustration 1 g00704077
2. Fasten F1 and F4 auxiliary control valves together with the existing mount bolts. Fasten the
control valves at the top with a washer and nut (28), as shown.
3. Install the F1 and F4 auxiliary control valves.
4. Lower the F1 and F4 auxiliary control valves in order to connect the hoses and electrical
connections on the bottom of the auxiliary control valves.
5. 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 to the hose assemblies.
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6. Connect two pilot lines (30) to the bottom of each control valve.
7. Connect one electrical connector (29) to each control valve.
8. Align the auxiliary control valves with the main control valve. Install the bottom two mount
bolts (27).
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9. Remove nut (28) and the washer from the top two mount bolts that pass through control
valves (F1) and (F4).
10. Install the top two mount bolts.
11. Tighten the four mount bolts (27) to a torque of 240 ± 40 N·m (177 ± 30 lb ft).
12. Connect one electrical connector (26) to each control valve.
13. Remove 7X-2547 Bolt (25).
14. Remove Tooling (B) and the hoist. Install the original bolt (25).
15. Install bolts (23) in order to connect tube (24) to the (F1) control valve.
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18. Connect hose assembly (18) to the (F4) control valve.
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19. Connect hose assembly (17) to the (F1) control valve.
20. Connect two hose assemblies (16) to both control valves.
21. Connect three hose assemblies (15) to the (F1) control valve.
22. Install panels (14) and support (12).
23. Install the washers and bolts (13) that hold the panels and support together.
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24. Install air filter (10).
25. Install the washers and bolts (9) in order to hold the air filter and the support to the machine.
26. Install hose (6) and install two hose clamps (7).
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27. Connect two electrical connectors (11) to the air filter. Install a new tie strap.
28. Close side door (8).
(F1) Auxiliary control valve
(F4) Auxiliary control valve
29. Install five pilot lines (5).
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30. Remove Tooling (A).
31. Install high efficiency filters in place of the pilot filter, 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.
32. 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" for the correct filling procedures.
33. Install the cap to the hydraulic tank.
34. Start the engine, and check the operation of the auxiliary attachments. Also, check for leaks.
Stop the engine.
35. 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.
36. 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 322C Hydraulic Excavators" for further information.
37. Install four bolts (4) and the washers in order to hold cover (3).
38. Install four bolts (2) and the washers in order to hold cover (1).
Copyright 1993 - 2019 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Thu Oct 10 22:08:01 UTC+0800 2019
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Shutdown SIS
Previous Screen
Product: EXCAVATOR
i01974016
Control Valve (Auxiliary) - Assemble - F2 Auxiliary Control
Valve
SMCS - 5051-016-AX
Assembly Procedure
Table 1
Required Tools
A 1U-6396 O-Ring Assembly Compound
B 155-0695 Thread Lock 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-ring seals, gaskets, and seals should always be replaced. A used O-ring seal may not have
the same sealing properties as a new O-ring. Use Tooling (A) during the assembly procedure.
Note: Apply a light film of hydraulic oil to all components before assembly.
Spool, Load Hold Check Valve, and Line Relief Valves
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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.
1. Install spring (57). Apply Tooling (B) to bolt (56). Install bolt (56). Tighten bolt (56) to
50 + 10 − 0 N·m (37 + 7 − 0 lb ft).
2. Install O-ring seals and backup rings in the line relief valves (42) and (44). Install O-ring
seals (49), (50), (52), (53), and (54). Install backup rings (51) and (55).
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injury.
3. Assemble the load hold check valve. Install O-ring seal (47), spring (46), and check valve
(45) in plug (48).
4. Install O-ring seals (37), (38), (39), and (40) in the valve housing. Install spool (41). Install
line relief valves (42) and (44). Tighten line relief valves (42) and (44) to 95 ± 14 N·m
(70 ± 10 lb ft). Install load hold check valve (43). Tighten load hold check valve (43) to
200 ± 25 N·m (148 ± 18 lb ft).
Solenoid Valve and Housing
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1. Install O-ring seal (33) on plug (30). Install O-ring seal (34) on fitting (29). Install O-ring
seal (35) on plug (31). Install O-ring seal (36) on fitting (32).
2. Install fittings (29) and (32). Install plugs (30) and (31).
3. Install O-ring seal (24), (25), (26), and (27) on solenoid valve (22). Install O-ring seal (28)
on fitting (23).
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4. Install fitting (23). Install solenoid valve (22) in the housing. Install two bolts (21).
5. Install O-ring seal (20) in the valve housing.
6. Install valve (19). Install two bolts (18).
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7. Install O-ring seal (15) on fitting (12). Install O-ring seal (16) on fitting (14). Install O-ring
seal (17) on plug (13).
8. Install fitting (12), plug (13), and fitting (14).
9. Install O-ring seal (7) on fitting (6). Install O-ring seal (8), (9), (10), and (11) on solenoid
valve (5).
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End By:
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a. Install the F2 auxiliary control valve. Refer to Disassembly and Assembly, "Control Valve
(Auxiliary) - Install" for the machine that is being serviced.
Copyright 1993 - 2019 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Thu Oct 10 22:07:00 UTC+0800 2019
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Shutdown SIS
Previous Screen
Product: EXCAVATOR
i01974012
Control Valve (Auxiliary) - Assemble - F4 Auxiliary Control
Valve
SMCS - 5051-016-AX
Assembly Procedure
Table 1
Required Tools
A 1U-6396 O-Ring Assembly Compound
B 155-0695 Thread Lock 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-ring seals, gaskets, and seals should always be replaced. A used O-ring seal may not have
the same sealing properties as a new O-ring. Use Tooling (A) during the assembly procedure.
Note: Apply a light film of hydraulic oil to all components before assembly.
Spool and Load Hold Check Valve
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1. Install spring (73). Apply Tooling (B) to bolt (72). Install bolt (72). Tighten bolt (72) to
50 + 10 − 0 N·m (37 + 7 − 0 lb ft).
2. Install O-ring seal (70) and (71) on fitting (63).
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injury.
3. Assemble the load hold check valve. Install O-ring seal (68), spring (67), and check valve
(66) in plug (69).
4. Install O-ring seal (64) and (65) on fitting (61).
5. Install O-ring seals (56), (57), (58), and (59) in the valve housing. Install spool (60). Install
fittings (61) and (63). Tighten fittings (61) and (63) to 95 ± 14 N·m (70 ± 10 lb ft). Install
load hold check valve (62). Tighten load hold check valve (62) to 200 ± 25 N·m
(148 ± 18 lb ft).
Solenoid Valve and Housing
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1. Install O-ring seal (52) on plug (49). Install O-ring seal (53) on fitting (48). Install O-ring
seal (54) on plug (50). Install O-ring seal (55) on fitting (51).
2. Install fittings (48) and (51). Install plugs (49) and (50).
3. Install O-ring seal (43), (44), (45), and (46) on solenoid valve (41). Install O-ring seal (47)
on fitting (42).
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Caterpillar Cat 320C Excavator (Prefix BBL) Service Repair Manual (BBL00001 and up).pdf

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Caterpillar Cat 320C Excavator (Prefix BBL) Service Repair Manual (BBL00001 and up).pdf