Inlet Valve Fitting Removal/Service - Graco 16N657 Operation - Repair - Parts

Inlet Valve Fitting Removal/Service

Inlet Valve Fitting
Removal/Service
This equipment stays pressurized until pressure is
manually relieved. To help prevent serious injury from
pressurized fluid, such as skin injection, splashing fluid
and moving parts, follow the Pressure Relief
Procedure when you stop spraying and before
cleaning, checking, or servicing the equipment.
Move sprayer to a non-hazardous area before servicing.
1. Engage trigger lock and pull prime/spray valve UP to
release pressure.
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2. Remove material cup, flexible suction tube, and bat-
tery.
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When removing flexible suction tube from sprayer, make
sure to pull directly on top fitting of flexible suction tube.
Flexible suction tube will become damaged if pulled from
bottom or on flexible portion.
3. Hold sprayer upside-down and use wrench to loosen
and remove inlet valve fitting, inlet valve, and spring.
NOTE: Make sure the spring also comes out. Use nee-
dle-nose pliers to remove if needed. Inlet cavity should
be completely empty (as shown below).
4. Clean as much excess material from inlet cavity as
possible. Make sure you also clean spring (a), inlet
valve (b), o-ring (c), and top of inlet valve fitting (d).
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NOTICE
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5. Use a thin wire less than 1/16 in. (such as a paper clip)
to check that the outlet valve fitting moves freely. If
valve does not move freely, perform Outlet Valve
Fitting Repair, page 26.
Installation
NOTE: Before installing, make sure o-ring (c) is installed
on poppet valve (b). A needle-nose pliers can also be used
to install parts (a - c).
1. Place poppet valve (b) with spring (a) on top of inlet
valve fitting (d). Push inlet fitting up into pump cavity.
a
b
c
d
2. Hold inlet in place and turn sprayer upside-down.
Remove inlet valve fitting and visually check to see
that inlet valve has seated correctly.
3. Replace inlet fitting and use wrench or socket to
tighten to 10 ft-lb (14 N•m).
Do NOT over-tighten inlet valve fitting. Damage to the
equipment will occur.
4. Use a pencil or thin rod to lightly push on inlet valve to
make sure it moves up and down freely. Perform Start-
ing New Job procedure, page 11.
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NOTICE
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