Sandpiper S20 Operating Manual

s20mdl1sm-REV0708 Model S20 Metallic Page 22
PILOT VALVE SERVICING
To service the pilot 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 pump assembly
drawing.
Using a 1/2" wrench or socket,
remove the four capscrews (item 11).
Remove the air inlet cap (item 8) and
air inlet gasket (item 21). The pilot valve
assembly (item 4) can now be removed
for inspection and service.
STEP #2: Disassembly of the pilot
valve.
Remove the pilot valve spool (item
4-D). Wipe clean and inspect spool and
o-rings for dirt, cuts or wear. Replace
the o-rings and spool if necessary.
Remove the retaining ring (item
4-F) from the end of the sleeve (item
4-B) and remove the sleeve from the
valve body (item 4-A). Wipe clean and
inspect sleeve and o-rings for dirt, cuts
or wear. Replace the o-rings and sleeve
if necessary.
STEP #3: Re-assembly of the pilot
valve.
Generously lubricate outside
diameter of the sleeve and o-rings.
Then carefully insert sleeve into valve
body. Take CAUTION when inserting
sleeve, not to shear any o-rings. Install
retaining ring to sleeve. Generously
lubricate outside diameter of spool and
o-rings. Then carefully insert spool into
sleeve. Take CAUTION when inserting
spool, not to shear any o-rings. Use
BP-LS-EP-2 multipurpose grease, or
equivalent.
STEP #4: Re-install the pilot valve
assembly into the intermediate.
Be careful to align the ends of the
pilot valve stem between the plunger
pins when inserting the pilot valve into
the cavity of the intermediate.
Re-install the gasket, air inlet cap
and capscrews. Connect the air supply
to the pump. The pump is now ready
for operation.
Pilot Valve Servicing, Assembly Drawing & Parts List
PILOT VALVE ASSEMBLY PARTS LIST
ITEM PART NUMBER DESCRIPTION QTY
4 095-110-000 Pilot Valve Assembly 1
4-A 095-095-157 Valve Body 1
4-B 755-052-000 Sleeve (With O-rings) 1
4-C 560-033-360 O-ring (Sleeve) 6
4-D 775-055-000 Spool (With O-rings) 1
4-E 560-023-360 O-ring (Spool) 3
4-F 675-037-080 Retaining Ring 1
FOR PUMPS WITH CAST IRON CENTER SECTION
ITEM PART NUMBER DESCRIPTION QTY
4 095-110-558 Pilot Valve Assembly 1
4-A 095-095-558 Valve Body 1
(includes all other items used on 095-110-000)
FOR PUMPS WITH STAINLESS STEEL CENTER SECTION
ITEM PART NUMBER DESCRIPTION QTY
4 095-110-110 Pilot Valve Assembly 1
4-A 095-095-110 Valve Body 1
(includes all other items used on 095-110-000)

Sandpiper S20 Specifications

General

Brand	Sandpiper
Model	S20
Category	Water Pump
Language	English