HOIST DOES NOT LOWER. (Cont) -726250739

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.

Adhesives, solvents, and sealing compounds can burn easily, can give off harmful vapors, and are

harmful to skin and clothing. To avoid injury or death, keep away from open fire and use in well-ventilated

area. If adhesives, solvent, or sealing compound gets on skin or clothing, wash immediately with soap and

water.

NOTE

Use a drain pan to catch leaking hydraulic oil.

VISUAL INSPECTION

(1) Disconnect hose from hoist brake

check valve. Discard preformed

packing.

(2) Remove check valve from hoist

brake elbow.

(3) Using a non metallic rod, push on

check ball inside check valve.

(a) If check valve check ball is stuck

open, check valve is faulty.

Replace hoist brake check valve

(Para 16-14).

(b) If check valve check ball has

freedom of movement inside

check valve, hoist brake is faulty.

Perform Steps (4) through (7)

below and notify supervisor.

(4) Coat check valve threads that will

be installed into hoist brake elbow

with pipe sealant.

(5) Install check valve on hoist brake

elbow.

(6) Coat preformed packing with oil.

(7) Install hose with preformed packing

on hoist brake check valve.