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Page Title: M1089 MATERIAL HANDLING CRANE (MHC) BOOM DOWN DOES NOT OPERATE FROM REMOTE STATION
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TM 9-2320-366-20-2
TM
e125. M1089 MATERIAL HANDLING CRANE (MHC) BOOM DOWN DOES NOT
OPERATE FROM REMOTE STATION
INITIAL SETUP
Equipment Conditions
Tools and Special Tools
Outriggers lowered (TM 9-2320-366-10-1).
Tool Kit, Genl Mech (Item 46, Appendix C)
Crane erected with approximately five feet
Multimeter, Digital (Item 22, Appendix C)
of cable payed out (TM 9-2320-366-10-1).
STE/ICE-R (Item 41, Appendix C)
Engine shut down (TM 9-2320-366-10-1).
References
Personnel Required
TM 9-4910-571-12&P
(2)
START
WARNING
KNOWN INFO
TEST OPTIONS
Read WARNING
1.
Other crane functions from
Voltage Test or
on following page.
remote station OK.
STE/ICE-R Test #89
Is 24 vdc present at
POSSIBLE PROBLEMS
REASON FOR QUESTION
junction box assembly
Faulty boom down solenoid
This question eliminates
terminal board position 14?
cable.
possible problems and
Faulty boom down solenoid.
determines where to
Faulty BOOM UP/DOWN
continue troubleshooting.
controller.
Faulty remote control
box internal wiring
NO
harness.
Faulty external remote
control cable.
Faulty remote control
cable.
Go to step 3 of this fault.
YES

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