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TM 10-3930-638-24&P
2-56. HYDRAULIC LIFT SYSTEM MAINTENANCE (cont)
—
.
a. Operational Test (cont).
STEP
PROCEDURE/ACTION
NORMAL
IF INDICATION
IF INDICATION
INDICATION
IS NORMAL
IS ABNORMAL
14
Place shift control lever in
Forks shift
Proceed to step 15 Check sideshift chains and pulleys for wear
LEFT position until forks
load to left
or damage; replace as necessary (para 2-56e)
are at extreme left position
smoothly
15
Place lift control lever in
Forks rotate
Proceed to step 18 Proceed to step 16
LOWER position until load
clockwise
is resting on ground. Back
smoothly
NOTE
vehicle away from load.
Place lift control lever in
If binding or loud noise is heard, grease
RAISE position until forks
lubrication fitting on rotation bearing
are three feet from ground.
(refer to current lubrication order) and
Then, place rotate control
repeat this step. If above condition still
lever in CW position until
exists, notify direct support maintenance
forks are rotated fully
(rotation bearing requires replacement)
clockwise
16
With forks in extreme
No oil leakage
Reconnect fitting Notify direct support maintenance (rotation
clockwise position, discon-
at rotation
to rotation cyl-
cylinder requires replacement)
nect fitting at rod end of
cylinder
inder and
rotation cylinder and plug
port where
proceed to step
fitting. Place rotate con-
fitting dis-
17
trol lever in CW position
connected
and hold
17
Check hoses, lines and
No oil leaks
Notify direct sup- Tighten fittings; replace leaking hoses (para
fittings between control
port maintenance 2-56f)
valve and rotation
(control valve
cylinder assembly for
requires replace-
oil leaks
ment)
18
Place rotate control lever
Forks rotate
Proceed to step 19 Proceed to step 16
in CCW position until
counter-
forks are rotated fully
clockwise
NOTE
counterclockwise
smoothly
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)
19
Turn engine off and check –
Operational test
hydraulic reservoir oil
complete
level; add hydraulic oil
if necessary (refer to
current lubrication order)
2-395
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