Caterpillar Cat 385B Excavator (Prefix MYA) Service Repair Manual Instant Download

1
Service Repair Manual
Models 385B EXCAVATOR
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Product EXCAVATOR Model 385B EXCAVATOR
MYA Configuration 385B Excavator MYA00001-UP
(MACHINE) POWERED BY 3456 Engine
Disassembly and Assembly 385B and 5090B
Excavators Excavator Systems Media Number
-RENR5407-06 Publication Date -01/02/2016
Date Updated -12/02/2016
i01668635
Control Valve - Disassemble - Right Travel, Left
Travel, and Stick SMCS - 5051-015 Disassembly
Procedure Table 1
Required Tools Required Tools Required Tools Required Tools
Tool Part Number Part Description Qty
A 1P-1862 Pliers 1
Note Cleanliness is an important factor. Before
you begin the disassembly procedure, the exterior
of the components should be thoroughly cleaned.
This will help to prevent dirt from entering the
internal mechanism. Precision components can be
damaged by contaminants or by dirt. Perform
disassembly procedures on a clean work surface.
Keep components covered and protected at all
times. Note Check the O-ring seals, the gaskets,
and the seals for wear or for damage. Replace the
components, if necessary.
Personal injury can result from parts and/or
covers under spring pressure. Spring force will
be released when covers are removed. Be prepared
to hold spring loaded covers as the bolts are
loosened.
3
Illustration 1
g00861921
1. Remove bolts (1) and cover (2).
Illustration 2
g00853761
2. Remove O-ring seals (3) and (4).
Illustration 3 g00862111 3. Remove load check
valves (5) and (6) and flow compensator valve (7).
4
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Illustration 4 g00862129 4. Disassemble flow
compensator valve (7). Remove spring (8), sleeve
(9), and spring (10) from valve (11).
Illustration 5 g00862158 5. Disassemble load
check valves (5) and (6). Remove boss (14) and
spring (13) from valve (12).
Illustration 6
g00862180
6. Remove relief valve (15).
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Illustration 7 g00862192 7. Disassemble relief
valve (15). Remove O-ring seals (16), (18), (19),
(21), and (22). Remove backup rings (17) and
(20). Note Only the O-ring seals and the backup
rings in the relief valves are serviceable.
However, the line relief valves may be
disassembled for cleaning.
Illustration 8 g00862206 8. Use a hoist and a
lifting sling to support actuator (26). Remove
bolts (23) and bracket (24). Remove bolts (25)
and actuator (26). The weight of the actuator is
approximately 28 kg (60 lb). Remove resolver
valve (27).
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Illustration 9 g00862251 9. Use a hoist and a
lifting sling to support actuator (31). Remove
bolts (28) and bracket (29). Remove bolts (30)
and actuator (31). The weight of the actuator is
approximately 28 kg (60 lb). Remove spacer (32).
Illustration 10 g00862276 10. Disassemble spacer
(32). Remove O-ring seals (33) and (34). Remove
plugs and O-ring seals (36). Remove pistons (35).
Illustration 11
g00862287
11. Remove bolts (37).
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Illustration 12 g00862297 12. Remove solenoid
(41), O-ring seal (40), spring (39), and valve
(38).
Illustration 13
g00862301
13. Remove O-ring seals (42) and (43).
Illustration 14 g00862376 14. Position the
manifold in a press and apply slight pressure.
Use Tooling (A) to remove retaining ring (44).
9
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.
Illustration 15 g00862378 15. Remove retainer
(48) and springs (45), (46), and (47).
Disassemble all of the solenoid assemblies.
Illustration 16
g00862381
16. Remove differential valve (49).
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Illustration 17 g00862383 17. Remove O-ring
seals (51), (52), and (54). Remove backup rings
(50) and (53).
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.
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Illustration 18 g00862390 18. Disassemble
differential relief valves. Remove plug (55),
O-ring seal (56), spacers (57), spring (58), and
valve (59) from body (60).
Illustration 19
g00862397
19. Remove bolts (61) and cover (62).
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Illustration 20 g00862399 20. Remove plug (63)
and the O-ring seal. Remove O-ring seals (64).
Illustration 21 g00862404 21. Remove plugs and
O-ring seals (65). Remove resolver valves (66).
Illustration 22 g00862501 22. Disassemble
resolver valves (66). Remove O-ring seals (67),
(68), and (69), and backup rings (70) and (71).
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Illustration 23 g00862523 23. Disassemble
resolver valve (27). Remove seat (72) and ball
(74). Remove O-ring seals (73), (75), and (76).
Remove backup rings (77) and (78).
Illustration 24 g00862663 24. Remove plugs and
O-ring seals (79). Remove spools (80), (81), and
(82).
14
Illustration 25
g00863333
25. Remove plugs and O-ring seals (83).
Copyright 1993 - 2020 Caterpillar Inc. All Rights
Reserved. Private Network For SIS Licensees.
Sun Oct 18 081816 UTC0800 2020
15
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Product EXCAVATOR Model 385B EXCAVATOR
MYA Configuration 385B Excavator MYA00001-UP
(MACHINE) POWERED BY 3456 Engine
Disassembly and Assembly 385B and 5090B
Excavators Excavator Systems Media Number
-RENR5407-06 Publication Date -01/02/2016
Date Updated -12/02/2016
i01674415
Control Valve - Disassemble - Proportional
Valve SMCS - 5051-015 Disassembly Procedure
Illustration 1
g00864935
1. Remove bolts (1) and valve group (2).
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Illustration 2
g00864942
2. Remove nut (3) and solenoid (4).
Illustration 3 g00864965 3. Remove bolt (5) and
bracket assembly (6). Remove cartridge (7).
Illustration 4 g00864984 4. Remove O-ring seals
(8) from cartridge (6).
Copyright 1993 - 2020 Caterpillar Inc. All Rights
Reserved. Private Network For SIS Licensees.
Sun Oct 18 081912 UTC0800 2020
17
Shutdown SIS
Previous Screen
Product EXCAVATOR Model 385B EXCAVATOR
MYA Configuration 385B Excavator MYA00001-UP
(MACHINE) POWERED BY 3456 Engine
Disassembly and Assembly 385B and 5090B
Excavators Excavator Systems Media Number
-RENR5407-06 Publication Date -01/02/2016
Date Updated -12/02/2016
i01659183
Control Valve - Assemble - Attachment, Bucket,
and Boom SMCS - 5051-012 Assembly Procedure Table
1
Required Tools Required Tools Required Tools Required Tools
Tool Part Number Part Description Qty
A 1P-1862 Pliers 1
Note Check the O-ring seals, the gaskets, and
the seals for wear or for damage. Replace the
components, if necessary.
Illustration 1
g00854185
1. Install plugs and O-ring seals (80).
18
Illustration 2 g00854173 2. Assemble resolver
(71). Install ball (73) in valve (74). Install
seat (72). Install backup rings (76) and (79).
Install O-ring seals (75), (77), and (78). Note
Reduce the temperature of seat (72) before
inserting the seat into the bore of valve (74).
Illustration 3 g00854162 3. Install resolver
(71). Tighten the resolver to a torque of 50 10
Nm (37 7 lb ft). Install stems (68), (69), and
(70). Install plugs and O-ring seals (67).
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Illustration 4 g00854153 4. Install O-ring seals
(66). Install plug (65) and the O-ring seal.
Illustration 5
g00854149
5. Position cover (64) and install bolts (63).
Illustration 6 g00854122 6. Assemble resolver
valve (57). Install backup rings (59) and (60).
Install O-ring seals (58), (61), and (62).
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Illustration 7 g00854098 7. Install plugs and
O-ring seals (56). Install resolver valve (57).
Tighten the resolver valve to a torque of 50 10
Nm (37 7 lb ft).
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.
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Illustration 8 g00854070 8. Install O-ring seal
(51), spacers (52), spring (53), and valve (54)
in body (55). Install plug (50).
Illustration 9 g00854005 9. Install backup rings
(45) and (48). Install O-ring seals (46), (47),
and (49).
22
Illustration 10 g00853986 10. Install
differential valve (44). Tighten the differential
valve to a torque of 235 10 Nm (173 7 lb ft).
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.
Illustration 11 g00853964 11. Assemble all of
the solenoid assemblies. Install springs (40),
(41), and (42). Install retainer (43).
23
Illustration 12 g00853948 12. Use Tooling (A) to
install retaining ring (39).
Illustration 13
g00853913
13. Install O-ring seals (37) and (38).
Illustration 14 g00853771 14. Install valve
(33), spring (34), O-ring seal (35), and solenoid
(36).
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Illustration 15
g00853770
15. Install bolts (32).
Illustration 16 g00853768 16. Install pistons
(29). Install plugs and O-ring seals (30).
Install O-ring seals (28) and (31). Install
spacer (19).
Illustration 17 g00853767 17. Use a hoist and a
lifting sling to position actuator group (26) and
install bolts (27). The weight of the actuator
group is approximately 28 kg (60 lb). Position
bracket assembly (24) and install bolts (25).
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Illustration 18 g00853766 18. Install spacer
(19). Use a hoist and a lifting sling to position
actuator group (23) and install bolts (21). The
weight of the actuator group is approximately 28
kg (60 lb). Position bracket assembly (20) and
install bolts (22).
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.
Illustration 19
g00856084
27
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friend! Thank you very much for reading. Enter
the link into your browser. The full manual is
available for immediate download. https//www.ebo
oklibonline.com