LEGEND:
= Items contained within Air End Kits
st1dl5sm-rev0717
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11
• Model ST1/ST25
IMPORTANT
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.
Main Air Valve Assembly Parts List
Item
Part Number
Description
Qty
1
031.111.557
Air Valve Assembly
1
1.A
031.083.000
Sleeve and Spool Set with Pins
1
1.B
095.051.557
Air Valve Body
1
1.C
560.058.360
O-ring
8
1.D
132.028.552
Bumper
2
1.E
165.078.147
End Cap
2
1.F
560.029.360
O-ring
2
1.G
675.043.115
Retaining Ring
2
1.H
210.008.330
Safety Clip
1
Air Distribution Valve Servicing
See repair parts drawing above.
Step 1:
Remove end cap retainer (1G).
Step 2:
Remove end cap (1E), bumper (1D) and o-rings (1C and 1F).
Step 3:
Remove spool part of (1A) (caution, do not scratch).
Step 4:
Press sleeve (1A) from body (1B).
Step 5:
Inspect O-Ring (1C) and replace if necessary.
Step 6:
Lightly lubricate O-Rings (1D) on spool (1A).
Step 7:
Press sleeve (1A) into body (1B).
Step 8:
Reassemble in reverse order.
Note:
Sleeve and spool (1A) set is match ground to a specified clearance
sleeve and spools (1A) cannot be interchanged.
1A
1A
1C
1D
1C
1F
1E
1G
1B
1D
1C
1F
1G
1H
1E
Air Distribution Valve Assembly
With Cast Iron Center
Waiting for new Drawing / Information
MODEL SPECIFIC
4: AIR
END
