Sandpiper S20, Operating Manual

Page: 18 / 31

s20mdl1sm-REV0708 Model S20 Metallic Page 16
Air Valve with Stroke Indicator Assembly
Drawing, Parts List
AIR VALVE ASSEMBLY PARTS LIST
Item Part Number Description Qty
1 031-146-000 Air Valve Assembly 1
1-A 031-143-000 Sleeve and Spool Set 1
1-B 095-094-559 Body, Air Valve 1
1-C 132-029-552 Bumper 2
1-D 165-096-559 Cap, Muffl er 1
1-E 165-098-147 Cap, End 2
1-F 530-028-550 Muffl er 1
1-G 560-020-360 O-Ring 8
1-H 675-044-115 Ring, Retaining 2
1-J 710-015-115 Screw, Self Tapping 4
1-K 210-008-330 Clip, Safety 1
1-M 560-029-360 O-Ring 2
For Pumps with Alternate Mesh, Sound Dampening Muffl ers
or Piped Exhaust:
1 031-147-000 Air Valve Assembly 1
(includes all items on 031-146-000 minus 1-D, 1-F, & 1-J).
AIR DISTRIBUTION VALVE WITH
STROKE INDICATOR OPTION
SERVICING
To service the air valve fi rst shut off the
compressed air supply, bleed the pressure
from the pump, and disconnect the air
supply line from the pump.
Step #1: See COMPOSITE REPAIR PARTS
DRAWING.
Using a 5/16" Allen wrench, remove the
four hex socket capscrews (item 12) and four
fl at washers (item 39). Remove the air valve
assembly from the pump.
Remove and inspect gasket (item 19)
for cracks or damage. Replace gasket if
needed.
Step #2: Disassembly of the air valve.
To access the inter nal air valve
components fi rst 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-ring (items 1-G)
and 1-M) for cuts or wear. Replace the
o-rings if necessary.
R e m ove t h e t wo bu m p e r s ( i t e m
1-C). Inspect the bumpers for cut, wear or
abrasion. 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
(part of item 1-A) for dirt, scratches, or
other contaminants. Remove the sleeve
if needed and replace 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 o-rings
(item 1-G and 1-M) 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 smaller unthreaded hole in the
endcap.
Remove the new sleeve and 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-rings and retaining ring.
Fa s t e n t h e a i r va l ve a s s e m b l y
(item 1) and gasket (item 19) to the pump.
Connect the compressed air line to the
pump. Remove the safety clip. The pump is
now ready for operation.
ATEX Compliant
Read these instructions
c o m p l e t e l y, b e f o r e
installation 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