Models 85622, 85628, 85626, 85637 Non-Metallic-REV1007
Page 16
PILOt VaLVe SerVICINg
To service the pilot valve first 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 7/16" wrench or socket,
remove the four capscrews (item 12).
Remove the air inlet cap (item 8) and
air inlet gasket (item 20). The pilot valve
assembly (item 3) can now be removed
for inspection and service.
SteP #2: Disassembly of the pilot
valve.
Remove the pilot valve spool (item
3-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
3-F) from the end of the sleeve (item
3-b) and remove the sleeve from the
valve body (item 3-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
3
252897
Pilot Valve assembly
1
3-A
252933
Pilot Valve Body
1
3-B
274585
Pilot Valve Sleeve with O-rings
1
3-C
275751
O-ring
6
3-D
274587
Pilot Valve Spool with O-rings
1
3-E
275752
O-ring
3
3-F
274589
Retaining Ring
1
To order call 1-800-548-1191 or visit www.partdeal.com - [email protected]
