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 2. Start engine and operate at idle speed.
Press 5 ampere circuit breaker on right instrument panel.
Place LIFT ARM control lever in RAISE position and check if control
lever returns to NEUT. position when desired height is reached.
a .
b.
c .
If control lever did not return to NEUT. position when desired
height was reached, go to step 5 below.
If 5 ampere circuit breaker blew, try to determine if it blew
immediately or when bucket reached desired height. If circuit
breaker blew immediately, problem is short circuit in hydraulic
filter switches or warning lamp circuitry. Perform resistance
c h e c k s o f c i r c u i t t o i s o l a t e d e f e c t i v e p a r t . I f c i r c u i t b r e a k e r
blew when bucket reached desired height, go to step 3 below.
If bucket stopped at desired height, problem was momentary short
circuit causing circuit breaker to open. Shut off engine.
Step 3.
Turn ignition key switch to off position.
Check orange-white wire between 5 ampere circuit breaker and control
valve for broken or cracked insulation or bare wire areas.
a. Repair broken or cracked insulation or bare wire areas by apply-
ing insulation tape to area.
b. If wire is okay, go to step 4 below.
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