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TM 10-3930-638-24&P
2-56. HYDRAULIC LIFT SYSTEM MAINTENANCE (cont)
a. Operational Test (cont).
IF INDICATION
IF INDICATION
NORMAL
PROCEDURE/ACTION
STEP
IS ABNORMAL
IS NORMAL
INDICATION
Proceed to step 15 Check sideshift chains and pulleys for wear
Forks shift
14
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
15
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
16
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-
17
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
17
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
18
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
19
Turn engine off and check
.
complete
hydraulic reservoir oil
level; add hydraulic oil
if necessary (refer to
current lubrication order)
2-395

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