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

TM 9-2320-366-20-2

e122. M1089 MATERIAL HANDLING CRANE (MHC) HOIST UP DOES NOT OPERATE FROM REMOTE STA-

e122.

TION (CONT)

KNOWN INFO

TEST OPTIONS

Other crane functions from

Continuity Test or

remote station OK.

STE/ICE Test #91

Is continuity present

REASON FOR QUESTION

Hoist up solenoid cable OK.

from remote control box

Hoist up solenoid OK.

connector pin F to HOIST

If continuity is not present,

External remote control

UP/DOWN controller

remote control box internal

cable OK.

internal wiring harness

wiring harness is faulty.

Remote control cable OK.

pin 3 and from remote

If continuity is present,

control box connector

HOIST UP/DOWN

POSSIBLE PROBLEMS

pin H to HOIST UP/DOWN

controller is faulty.

Faulty remote control

controller internal wiring

box internal wiring

harness pin 1?

harness.

Faulty hoist up/down

controller.

Repair remote control box

YES

internal wiring harness

(para 7-32).

Replace HOIST UP/DOWN

controller (para 7-32).

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