Sandpiper S20 Operating Manual

s20mdl1sm-REV0708 Model S20 Metallic Page 23
ACTUATOR PLUNGER SERVICING
To service the actuator plunger 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 (items 11).
Remove the air inlet cap (item 8) and
air inlet gasket (item 21). The pilot
valve assembly (item 4) can now be
removed.
Step #2: Inspect the actuator
plungers.
See ILLUSTRATION AT RIGHT.
The actuator plungers (items 32)
can be reached through the pilot valve
cavity in the intermediate assembly
(item 5).
Remove the plungers (item 32) from
the bushings (item 7) in each end of
the cavity. Inspect the installed o-ring
(items 27) for cuts and/or wear. Replace
the o-rings if necessary. Apply a light
coating of grease to each o-ring and
re-install the plungers in to the bushings.
Push the plungers in as far as they will
go.
To remove the bushings (item
7), first remove the retaining rings
(item 33) by using a fl at screwdriver.
NOTE: It is recommended that new
retaining rings be installed.
Step #3: Re-install the pilot
valve assembly into the intermediate
assembly.
Be careful to align the ends of
the stem between the plungers when
inserting the stem of the pilot valve into
the cavity of the intermediate.
Re-install the gasket (item 21),
air inlet cap (item 8) and capscrews
(item 11).
Connect the air supply to the pump.
The pump is now ready for operation.
Actuator Plunger Drawing
27
7
33
32
5
Read these instructions
completely, before
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

Sandpiper S20 Specifications

General

Brand	Sandpiper
Model	S20
Category	Water Pump
Language	English