Sandpiper S30, Service & Operating Manual

s30nmdl2sm-rev0614 

                                                 Model S30 Non-Metallic Page 20

AIR DISTRIBUTION VALVE 

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 14) 

and four flat washers (item 41). Remove 

the air valve assembly from the pump.

Remove and inspect gasket (item 

23) 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 bumpers for cuts, 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 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 end cap (item 1-E) with 

an o-ring (item 1-G) and one bumper 

(item 1-C) 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. 

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 it touches the bumper 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 23) to the pump.

Connect the compressed air line to 

the pump. The pump is now ready for 

operation.

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