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Page Title: CRANE DOES NOT SWING OR SWINGS SLOWLY. (Cont)
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TM 9-2320-364-34-1
High pressure hydraulics [oil under 3000 psi (20,685 kPa) pressure] operate this equipment. Refer to
S
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.
S
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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