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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.
VISUAL INSPECTION
(1) Disconnect adapter hoses from swing
motor valve and from crane
hoses. Discard preformed packings.
(2) Remove swing motor valve
from swing motor (Para 16-19).
(3) Disassemble swing motor valve
assembly (Para 16-19).
(a) If valve assembly is damaged or
clogged, repair swing motor valve
(Para 16-19).
(b) If swing motor valve is OK, swing
motor is faulty. Replace swing
motor (Para 16-19) and perform
Steps (4) through (9) below.
(4) Assemble swing motor valve
(Para 16-19).
(5) Install swing motor valve
on swing motor (Para 16-19).
(6) Remove cap from swing motor
valve assembly. Discard preformed
packing.
(7) Install swing motor on swing drive
gear reducer with two lockwashers
and screws.
(8) Install two hoses with preformed
packings on swing motor valve.
(9) Install tube with preformed packing
on swing motor valve.

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