Operational Test (cont).

TM 10-3930-638-24&P

2-56. HYDRAULIC LIFT SYSTEM MAINTENANCE (cont)

a. Operational Test (cont).

IF INDICATION

NORMAL

PROCEDURE/ACTION

STEP

IS ABNORMAL

IS NORMAL

INDICATION

Proceed to step 15 Check sideshift chains and pulleys for wear

Forks shift

Place shift control lever in

or damage; replace as necessary (para 2-56e)

LEFT position until forks

load to left

smoothly

are at extreme left position

Proceed to step 18 Proceed to step 16

Forks rotate

Place lift control lever in

clockwise

LOWER position until load

NOTE

smoothly

is resting on ground. Back

vehicle away from load.

Place lift control lever in

If binding or loud noise is heard, grease

lubrication fitting on rotation bearing

RAISE position until forks

(refer to current lubrication order) and

are three feet from ground.

repeat this step. If above condition still

Then, place rotate control

exists, notify direct support maintenance

lever in CW position until

(rotation bearing requires replacement)

forks are rotated fully

clockwise

Reconnect fitting Notify direct support maintenance (rotation

No oil leakage

With forks in extreme

to rotation cyl-

at rotation

cylinder requires replacement)

clockwise position, discon-

inder and

nect fitting at rod end of

cylinder

proceed to step

port where

rotation cylinder and plug

fitting dis-

fitting. Place rotate con-

connected

trol lever in CW position

and hold

Notify direct sup- Tighten fittings; replace leaking hoses (para

Check hoses, lines and

No oil leaks

port maintenance 2-56f)

fittings between control

(control valve

valve and rotation

requires replace-

cylinder assembly for

ment)

oil leaks

Proceed to step 19 Proceed to step 16

Place rotate control lever

Forks rotate

in CCW position until

counter-

NOTE

forks are rotated fully

clockwise

smoothly

counterclockwise

If binding or loud noise is heard, grease

lubrication fitting on rotation bearing

(refer to current lubrication order) and

repeat this step. If above condition

still exists, notify direct support main-

tenance (rotation bearing requires

replacement)

Operational test

Turn engine off and check

complete

hydraulic reservoir oil

level; add hydraulic oil

if necessary (refer to

current lubrication order)

2-395