TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
16. MAIN FRAME, HOOK ARM, AND WINCH DO NOT OPERATE (continued).
9.
KNOWN INFO
TEST OPTIONS
Do the LHS/winch
Cab and remote controls
functions work when
inoperative.
the hydraulic control
CB15 OK.
REASON FOR QUESTION
solenoids are manu-
POSSIBLE PROBLEMS
ally bypassed (para 2-
To determine whether the
fault is isolated to the
Quick-disconnect
CBT electrical system or
couplings not installed
the hydraulic system.
properly.
Hydraulic lines, hoses,
or fittings faulty.
Relay K9 faulty.
Cab control box faulty.
Linking harness faulty.
Main junction box wiring
faulty.
Go to Step 18.
NO
CBT ground circuit faulty.
Free flow valve solenoid
harness faulty.
Free flow valve solenoid
faulty.
YES
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