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TM 9-2320-364-20-3
2-2564
4. BOOM WILL NOT LOWER USING REMOTE CONTROL UNIT.
INITIAL SETUP
1.
Go to Step 2 of this
Fault.
START
YES
NO
Boom 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.
Brown Wire from truck remote
control connector outlet to
terminal 14 faulty.
White wire from terminal 14 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)
Crane outriggers down, (TM 9-2320-364-10)
Mast fully erected, (TM 9-2320-364-10)
Are 22 to
28 vdc
measured at
boom DOWN solenoid
harness connector, terminal 1
with crane ON and remote
control unit BOOM lever in
DOWN position?
WARNING
Go to Step 8 of this
Fault.
Read WARNING
on Page 2-2565
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