Haskel AG Serie Betriebs- Und Wartungsanleitungen Seite 7

5.2.1 Note method of lockwiring screws. Remove and discard safety wire. Remove (4) screws and washer
and lift off retaining plate.
5.2.2 Grasp hex plug and carefully pull pilot piston
assembly with cap from valve body. (Ref. Fig. 3.)
Remove boss o-ring sealed hex plug. Push shaft out
of the cap to reveal o-ring on end of shaft. (Ref. Fig.
4.)
Inspect all static and dynamic seals and replace any
that are damaged, worn or swollen. (If any special
tools are required, it will be noted on the detailed
assembly drawing.)
5.2.3 Reach inside valve body. Remove first plastic
bumper. Carefully pull out spool. Inspect (2) spool
seals and replace any that are damaged, worn or
swollen. If spool cannot be pulled out, remove
cartridge from opposite end of casting and push
spool out with a rod or screw driver. (Ref. Fig. 5.)
Use a flashlight to inspect second (inner) bumper at
the end of the sleeve. If this bumper is in place put all
parts back as follows.
Air Driven Gas Booster Compressor, 8" Drive AG Series • OM-12F
Figure 3. Cycling valve cap with pilot
piston
Figure 4. Pilot shaft end seal
Figure 5. Pushing from opposite end to
remove valve spool
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