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Page Title: M1089 MATERIAL HANDLING CRANE (MHC) BOOM UP DOES NOT OPERATE FROM REMOTE STATION (cont)
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TM 9-2320-366-20-2
TM
e124. M1089 MATERIAL HANDLING CRANE (MHC) BOOM UP DOES NOT OPERATE FROM REMOTE STA-
e124.
TION (CONT)
KNOWN INFO
TEST OPTIONS
4.
Other crane functions from
Continuity Test or
Is continuity present
remote station OK.
STE/ICE Test #91
from remote control box
REASON FOR QUESTION
Boom up solenoid cable OK.
If continuity is not present,
connector pin N to BOOM
Boom up solenoid OK.
remote control box internal
UP/DOWN controller
External remote control
wiring harness is faulty.
internal wiring harness
cable OK.
If continuity is present,
pin 3 and from remote
Remote control cable OK.
POSSIBLE PROBLEMS
BOOM UP/DOWN
control box connector
Faulty remote control
controller is faulty.
pin N to BOOM UP/DOWN
box internal wiring
controller internal wiring
harness.
harness pin 1?
Faulty boom up/down
controller.
NO
YES
Repair remote control box
internal wiring harness
(para 7-32).
Replace BOOM UP/DOWN
controller (para 7-32).
2-1336

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