OSS DISABLES FUNCTIONS (CONT). -726250795

TM 9-2320-364-34-1

Remove all jewelry such as rings, dog tags, bracelets, etc. If jewelry or tools contact positive electrical

circuits a direct short may result. Damage to equipment, injury or death to personnel may result.

Do not stand under crane. Mechanical failure and operator error can cause injury or death to personnel.

OPERATION TEST

(1) Loosen six screws and remove six

clips from crane main junction box

cover.

(2) Remove cover from junction box.

(3) Connect junction box terminals 1

and 19 using jumper wire.

(4) Disconnect top connector from OSS

box.

(5) Start engine (TM 9-2320-364-10).

(6) Set WINCH/CRANE switch to

CRANE position.

(7) Set hydraulic selector switch to

CRANE/SRW position.

(8) Set crane main POWER switch to

ON position.

(9) Attempt to operate boom and hoist

functions using BOOM,

TELESCOPE and HOIST control

(a) If functions do not operate,

perform Steps (12) through (15)

below and go to Step 5 of this

Fault.

(b) If functions operate, perform

Steps (10) through (17) below

and go to Step 3 of this Fault.

(10) Position boom so that OSS box is

accessible for repairs.

(11) Telescope boom out completely.

(12) Set crane main POWER switch to

OFF position.

(13) Set hydraulic selector switch to OFF

position.

(14) Turn OFF ENGINE switch.

(15) Remove two screws and disconnect

four white wires from crane main

junction box, terminal 18.

(16) Disconnect jumper wire from crane

main junction box terminals 1

and 19.

(17) Connect connector to OSS box.