CRANE DOES NOT SWING OR SWINGS SLOWLY. (Cont) -726250605

TM 9-2320-364-34-1

High pressure hydraulics [oil under 3000 psi (20,685 kPa) pressure] operate this equipment. Refer to

vehicle operator and maintenance manuals for hydraulic oil pressure. Never disconnect any hydraulic

line or fitting without first dropping pressure to zero. Failure to comply may result in injury to personnel.

Fuel and oil are slippery and can cause falls. To avoid injury, wipe up spilled fuel or oil with rags.

NOTE

Use a drain pan to catch leaking hydraulic oil.

OPERATION TEST

(1) Tag, mark and disconnect two

hoses from swing motor valve.

Discard preformed packings.

(2) Connect adapter hoses with

preformed packings to swing

motor hoses.

(3) Connect adapter hoses with

preformed packings to swing

motor.

(4) Disconnect tube from swing motor

valve assembly. Discard preformed

packings.

(5) With aid of assistant, remove two

screws, lockwashers and swing

motor from swing drive gear

reducer. Discard lockwashers.

(6) Install cap on swing brake motor

valve assembly where tube was

removed from.

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

(8) Set WINCH/CRANE switch to

CRANE position.

(9) Set hydraulic selector switch to

CRANE/SRW position.

(10) Set crane POWER switch to

ON position.

(11) Operate swing motor using SWING

control lever.

(a) If swing motor does not operate,

perform Steps (12) through (14)

below and go to Step 5 of this

Fault.

(b) If swing motor operates,

perform Steps (12) through (14)

below and go to Step 6 of this

Fault.

(12) Set crane POWER switch to

OFF position.

(13) Set hydraulic selector switch to OFF

position.

(14) Turn OFF ENGINE switch.

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