SANDPIPER S20 Non-Metallic - Manual (Page 23)

520-202-000 9/03 Model S20 Non-Metallic Design Level 2 Page 21
Read these instructions
completely, before in-
stallation and start-up. It
is the responsibility of
the purchaser to retain
this manual for reference. Failure to
comply with the recommendations stated
in this manual will damage the pump, and
void factory warranty.
IMPORTANT
AIR DISTRIBUTION VALVE WITH
STROKE INDICATOR OPTION
SERVICING
To service the air valve first shut off
the compressed air, bleed the pressure
from the pump, and disconnect the air
supply line from the pump.
STEP #1: See Composite Repair and
Parts Drawing.
Using a 5 / 16 " Allen wrench, remove
the four hex socket capscrews (item 15)
and four flat washers (item 42). Remove
the air valve assembly from the pump.
Remove and inspect gasket (item 24)
for cracks or damage. Replace gasket if
needed.
STEP #2: Disassembly of the air
valve.
To access the internal air valve
components first remove the two retaining
rings (item 1-H) from each end of the air
valve assembly using clip ring pliers.
Next remove the two end caps (item
1-E). Inspect the o-rings (item 1-G) for
cuts or wear. Replace the o-rings if
necessary.
Remove the two bumpers (item 1-C).
Inspect the bumper for cuts, wear or
abrasions. Replace if necessary.
Remove the spool (part of item 1-A)
from the sleeve. Be careful not to scratch
or damage the outer diameter of the
spool. Wipe spool with a soft cloth and
inspect for scratches or wear.
Inspect the inner diameter of the
sleeve (par t of item 1-A) for dir t,
scratches, or other contaminates.
Remove the sleeve if needed and
replace both the sleeve and spool with
a new sleeve and spool set (item 1-A).
STEP #3: Reassembly of the air
valve.
Install one bumper (item 1-C) and
one end cap (item 1-E) with an o-ring
(item 1-G) into one end of the air valve
body (item 1-B). Install one retaining ring
(item 1-H) into the groove on the same
end. Insert the safety clip (item 1-K)
through the small unthreaded hole in the
end cap.
Remove the new sleeve an spool
set (item 1-A) from the plastic bag.
Carefully remove the spool from the
sleeve. Install the six o-rings (item 1-G)
into the six grooves on the sleeve. Apply
a light coating of grease to the o-rings
before installing the sleeve into the valve
body (item 1-B), align the slots in the
sleeve with the slots in the valve body.
Insert the spool into the sleeve. Be
careful not to scratch or damage the
spool during installation. Push the spool
in until the pin touches the safety clip
on the opposite end.
Install the remaining bumper, end cap
with o-ring, and retaining ring.
Fasten the air valve assembly (item
1) and gasket (item 24) to the pump.
Connect the compressed air line to
the pump. The pump is now ready for
operation.