CRANE DOES NOT SWING OR SWINGS SLOWLY. (Cont) -726250607

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.

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.