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 TM 9-2320-285-24-2
3-42.
FIFTH WHEEL HYDRAULIC SYSTEM MAINTENANCE (CONT)
c. Hydraulic Control Valve.
This task covers:
a.
Removal
e.
Reassembly
b.
Disassembly
f.
Installation
c.
Cleaning
g.
Adjustment
d.
Inspection
INITIAL SETUP
Tools
Personnel Required
No. 1 Common Organizational Maintenance
Three Automotive Repairers MOS 63H
Tool Kit
Socket wrench set
References
Torque wrench
LO 9-2320-285-12
Retaining ring pliers
(M878A1 Lubrication Order)
Safety glasses
Pressure gage, 3000 psi
Equipment Condition
Paragraph
Condition Description
Materials/Parts
Cleaning solvent
Item 1, Appendix C
Vehicle parked on level
Clean cloths
Item 2, Appendix C
surface, engine off, and
Hydraulic oil
Item 22, Appendix C
parking brake applied.
Retaining ring
FSCM 02249 PN 0914-001
2-63e
Boom platform removed.
Two O-ring seals
FSCM 02249 PN 7694-001
2-65c
Rear platform removed.
Washer
FSCM 02249 PN 1213-001
2-78b(1) Hydraulic reservoir drained.
O-ring
FSCM 02249 PN 0926-001
2-78b(2) Hydraulic lines and fittings /
Gasket
FSCM 02249 PN 0923-001
removed from hydraulic control
O-ring
FSCM 02249 PN 2706-001
valve.
Cotter pin
FSCM 02249 PN 929-001
2-78a
Fifth wheel control cable dis-
Cotter pin
FSCM 02249 PN 086-001
connected from control valve.
STEP
LOCATION
ITEM
ACTION
REMARKS
REMOVAL
1
Left hand
a.
Cotter pin (1)
Remove and
frame rail
discard
b.
Pin (2)
Remove
c.
Cotter pin (3)
Remove and
Remove from link (4)
discard
d.
Link (4)
a. Separate
Separate two sections of link
b. Remove
e.
Handle (5)
Remove
f.
Three locknuts
Remove
(6), cap-
screws (7),
and washers
(8)
3-434
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