SANDPIPER S20 Non-Metallic - Manual (Page 18)

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15
• Model S20 Non-Metallic
Intermediate Assembly
IMPORTANT
When the pumped product source is at a higher
level than the pump (flooded suction condition),
pipe the exhaust higher than the product source
to prevent siphoning spills. In the event of a
diaphragm failure a complete rebuild of the
center section is recommended.
Intermediate Assembly Drawing
Step 1: Remove plunger, actuator (31) from center of
intermediate pilot valve cavity.
Step 2: Remove Ring, Retaining (33), discard.
Step 3: Remove bushing, plunger (6), inspect for wear
and replace if necessary with genuine parts.
Step 4: Remove O-Ring (28), inspect for wear and
replace if necessary with genuine parts.
Step 5: Lightly lubricate O-Ring (28) and insert into
intermediate.
Step 6: Reassemble in reverse order.
Step 7: Remove Seal, Diaphragm Rod (35).
Step 8: Clean seal area, lightly lubricate and install new Seal,
Diaphragm Rod (35).
4
35 6
33
31 28
MODEL SPECIFIC
4: AIR
END