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TM 9-2320-364-20-3
2-2528
2. HOIST WILL NOT LOWER USING REMOTE CONTROL UNIT.
INITIAL SETUP
NOTE
This problem can occur at the right or left hand remote control connector. Only the right hand connector is illustrated.
1.
Go to Step 2 of this
Fault.
START
YES
NO
Hoist operates using manual
control lever.
At least one other remote
control function operates.
Remote control unit harness
faulty.
Controller switch faulty.
Controller circuit card faulty.
Remote control unit cable
faulty.
Wire from truck remote control
connector outlet to terminal 16
faulty.
Wire from terminal 16 to
solenoid faulty.
Solenoid black wire faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Voltage test.
STE/ICE-R #89.
If component or wire supplying
voltage to solenoid is loose,
faulty or shorted; 22 to 28 vdc
will not be present at solenoid.
2-29. CRANE TROUBLESHOOTING (CONT).
Tools and Special Tools
Tool Kit, General Mechanic’s: Automotive
(Item 74, Appendix G)
STE/ICE-R (optional) (Item 3, Appendix G)
Multimeter (Item 44, Appendix G)
References
TM 9-2320-364-10
TM 9-4910-571-12&P
Equipment Condition
Engine OFF, (TM 9-2320-364-10)
Parking brake applied, (TM 9-2320-364-10)
Wheels chocked, (TM 9-2320-364-10)
Remote control unit connected,
(TM 9-2320-364-10)
Mast fully erected, (TM 9-2320-364-10)
Crane outriggers down, (TM 9-2320-364-10)
WARNING
Are 22 to 28
vdc measured
at hoist valve solenoid (outer)
harness connector, terminal 1
with crane on and remote
control unit HOIST lever in
DOWN position?
Go to Step 8 of this
Fault.
Read WARNING
on Page 2-2529
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