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

TM 9-2320-366-20-2

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

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

harness.

Faulty external remote

control cable.

Faulty remote control

cable.

Go to step 3 of this fault.

YES

2-1342