Case W9 - Hydraulic Reservoir Service

SERVICING THE HYDRAULIC RESERVOIR
The hydraulic reservoir and its com-
ponent parts must be serviced after every
1000 hours of operation.
Figure 7
Pressure/Vacuum Relief
Valve (Breather)
In addition to replacing the filter at
1000 hour intervals the 9.reather should be
completely disassembled and cleaned to as-
sure proper poppet operaticm.
Disassembly
1. Unscrew relief valve from fill tube.
2. Remove the two screws, end cap, cover,
filter and flat washer from the valve body.
3.
Push the sleeve and poppet assembly out
of the ·ml ve body.
4.
Remove the spring seat and 0-ring from
the sleeve.
5. Remove the snap ring from the bottom
of the sleeve and push the poppet guide
and poppet out of the sleeve. It may be
necessary to remove the remaining snap
ring in order to remove the poppet. Then
remove the 0-ring from the poppet.
12
6. Discard the 0-rings and clean the valve
parts and filter in mineral spirits. Dry
with compressed air.
END CAP SPRING
. . ~ITT;. COVER
~t ,It!""
• ;i' FILTER
PRING SEAT
SLEEVE
0-RING
lif ~~
1
1~ =: ":j .:..:;H- SPRING
t:<j~ ~ POPPET
I iff.'~ ti SNAP RING
I l
~.i.~ ~ POPPET GUIDE
-,•: ~ SNAP RING
Figure 8
Assembly
WASHER
700295
1. Position a new 0-ring on the poppet .
Then place the poppet and poppet spring
in the sleeve.
2. Install the upper snap ring if it was
removed. Then position the poppet guide
in the sleeve and install the lower snap
ring in the sleeve.
3. Install a new 0-ring on the sleeve. Then
position the spring seat on the sleeve
and install the sleeve and poppet as-
sembly in the valve body sleeve.
4. Position the flat washer and filter on the
valve body. Then place the cover over
the filter.
5. Position the sleeve spring in the spring
seat. Place the end cap on the spring
and compress spring and install the two
retaining screws with lockwashers.
6. Install relief valve on fill tube.