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TM 10-3930-643-20
HYDRAULIC SYSTEM TROUBLESHOOTING AND MAINTENANCE. (cont)
14-7.
Hydraulic Reservoir and Filter (Sheet 3 of 6)
SERVICE (cont)
6.
7.
8.
9.
10.
11.
12.
13.
14.
Using a 13/16” open end wrench,
remove plug (3) from
d r a i n v a l ve
( 4 ).
Install a short 3/4” threaded pipe
nipple into drain valve (4) where
plug (3) was removed.
Install a hose over nipple.
Place
other end of hose into a 30 gallon
container.
Using an 11/16” open-end wrench, turn
drain valve (4) counterclockwise to
o p e n . A l l o w r e s e r v o i r t o d r a in
completely. Close drain valve (4).
Remove wooden supports from boom
arms. Slowly lower boom and forks.
After the boom arms are on the
ground, push the tilt lever forward
and let forks down slowly.
This
will force hydraulic oil out of boom
and
t i l t c y l i n d e r s
i n to
the
r e s e r v o i r .
Turn drain valve (4) counterclock-
wise to open.
A l l o w r e s e r v o i r to
drain completely.
Turn drain valve (4) clockwise to
close. Remove 3/4” threaded pipe
nipple and hose.
Close access door
( 2 ) .
Using a 3/4” open end wrench,
unscrew filter element (5) from base
assembly by turning
c o u n t e r c l o c k-
wise.
Remove
p r e f o r m e d p a c k i n g ( 6 ),
indicate; (7) and preformed packing
( 8 ) f r o m f i l t e r e l e m e n t ( 5 ) .
Discard preformed packings (6 and 8)
and filter element (5).
Go to sheet 4
14-26
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