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TM 10-3930-643-34
HYDRAULIC SYSTEM TROUBLESHOOTING AND MAINTENANCE. (cont)
12-3.
Loader Control Valve. (Sheet 12 of 14)
TESTING/ADJUSTING - TILT BACK CIRCUIT RELIEF VALVE
72.
73.
74.
75.
76.
77.
78.
79.
80.
81.
Vent hydraulic system pressure, refer
to TM 10-3930-643-10.
Using a 9/16” socket and socket
wrench handle, remove four bolts (54)
and two flange halves (55) from tilt
cylinder, left side.
Disconnect hose assembly (56) from
tube assembly (58).
Using a scribe, remove and discard
preformed packing (57).
Position new preformed packing (57)
and sandwich test block on tube
assembly (58), refer to Appendix D
for fabrication instruction for
sandwich test block.
Install new preformed packing (57) on
hose assembly (56).
Connect hose assembly
(56) to
sandwich test block.
Using a 9/16” socket and socket
wrench handle, install
two flange
halves (55) and four Y bolts.
Using a 10" adjustable wrench,
install pressure tester hand pump in
sandwich test block.
Start engine in
operator’s
compartment.
Go to sheet 13
12-24
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