M1089 MATERIAL HANDLING CRANE (MHC) BOOM UP DOES NOT OPERATE FROM REMOTE STATION (cont)

TM 9-2320-366-20-2

e124. M1089 MATERIAL HANDLING CRANE (MHC) BOOM UP DOES NOT OPERATE FROM REMOTE STA-

e124.

TION (CONT)

KNOWN INFO

TEST OPTIONS

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.

YES

Repair remote control box

internal wiring harness

(para 7-32).

Replace BOOM UP/DOWN

controller (para 7-32).

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