Inlet Valve Cleaning - Graco 258870 Manual

Inlet Valve Cleaning

Inlet Valve Cleaning
Removal
1. Engage trigger lock and pull relief valve UP to
release pressure.
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2. Remove material cup and suction tube.
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3. Hold sprayer upside-down and use wrench or
socket to loosen and remove inlet fitting, inlet valve,
and spring.
NOTE: Make sure the spring also comes out. Use
needle-nose pliers to remove if needed. Inlet cavity
should be completely empty (as shown below).
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4. Clean as much excess material from pump cavity as
possible. Make sure you also clean spring (a), o-ring
(c), and top of inlet fitting (d).
Installation
NOTE: Before installing, make sure o-ring (c) is installed
on inlet valve (b).
1. Place inlet valve (b) with spring (a) on top of inlet fit-
ting (d). Push inlet fitting up into pump cavity.
a
b
c
d
2. Hold inlet in place and turn sprayer upside-down.
Remove inlet fitting and visually check to see that
inlet valve has seated correctly.
3. Replace inlet fitting and use wrench and socket to
tighten to 10 ft-lb.
NOTICE
Do NOT over-tighten inlet fitting. Damage to the
equipment will occur.
4. Use your Fine-Finish Optimizer cleaning tool to
lightly push on inlet valve to make sure it moves up
and down freely.
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