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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.
PRESSURE TEST
(1) Tag, mark and disconnect hose
from taller elbow at left of four
valve bank. Discard preformed
packing.
(2) Connect flowmeter IN port adapter
hose with preformed packing to
elbow.
(3) Connect flowmeter OUT port
adapter hose with preformed
packing to disconnected crane
hose.
(4) Open flowmeter load valve.
(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 POWER switch to
ON position.
(9) Hold SWING control lever in CW
position and observe flowmeter.
(a)  If a minimum of 1800 psi
(12,411 kPa) are not present,
perform Steps (10) through (14)
below and repair swing motor
valve (Para 16-19).
(b)  If 1800 psi (12,411 kPa) or more
are present, perform Steps (10)
through (14) below and go to
Step 4 of this Fault.
(10) Set crane POWER switch to
OFF position.
(11) Set hydraulic selector switch to OFF
position.
(12) Turn OFF ENGINE switch.
(13) Disconnect adapter hoses from
elbow and hose. Discard preformed
packings.
(14) Connect crane hose with preformed
packing to elbow.

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