TM 5-3805-262-20
3-25. HYDRAULIC SYSTEM TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
5. BUCKET HEIGHT CONTROL NOT OPERATING PROPERLY (Cont).
Step 4. Unlock and open front access
door.
Disconnect connector at control
valve assembly lift arm spool.
Connect multimeter between pins
A and B of control valve assem-
bly connector and then pins B
and C.
Multimeter should indicate 55
ohms resistance between pins A
and B, and B and C.
a .
b .
If multimeter indicates zero
r e s i s t a n c e , n o t i f y n e x t
higher maintenance level to
replace control valve assem-
bly (solenoid is short
circuited and must be
r e p l a c e d ).
If multimeter indicates 55
ohms, repair orange-white
wire between 5 ampere cir-
cuit breaker and control
valve assembly (page 5-168).
Step 5. Disconnect connector at control valve assembly lift arm spool.
Connect multimeter between wiring harness connector pin C and
chassis frame.
Turn ignition key switch to on position.
Multimeter should indicate 24 volts.
Turn ignition key switch to off position.
Connect multimeter between wiring harness connector pin A and
chassis frame .
Turn ignition key switch to on position.
Multimeter should indicate 24 volts.
Turn ignition key switch to off position.
a .
If 24 volts not obtained, check orange-white wire between con-
nector and 5 ampere circuit breaker for continuity. If continui-
ty obtained, remove right instrument panel (page 5-48) and
replace circuit breaker (page 5-53).
b. If 24 volts obtained, go to step 6 below.
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