TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
16. MAIN FRAME, HOOK ARM, AND WINCH DO NOT OPERATE (continued).
16.
KNOWN INFO
TEST OPTIONS
Free Flow Valve Solenoid
Is the resistance of the
Cab control box main
Test.
free flow valve sole-
power supply OK.
noid 3947 ohms?
Cab and remote control
REASON FOR QUESTION
inoperative.
Resistance less than or
CB15 OK.
greater than the specifica-
Hydraulic system OK.
tion indicates a faulty
Cab control box OK.
Linking harness OK.
Main junction box wiring
OK.
CBT ground circuit OK.
Free flow valve solenoid
harness OK.
POSSIBLE PROBLEMS
Free flow valve
Free flow valve solenoid
solenoid is faulty.
NO
faulty.
Notify supervisor.
Fault not corrected.
YES
Notify supervisor.
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