Graco 3A2587H important safety instructions Inlet Valve Fitting Removal/Service, Installation

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 unplug.

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NOTICE

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.

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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).

Inlet Valve Fitting Removal/Service

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).

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 22.

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Installation

NOTE: Before installing, make sure o-ring (c) is installed on poppet valve (b). A needle-nose pliers may 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

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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.

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3.Replace inlet fitting and use wrench to tighten to 10 ft-lb (14 N•m).

NOTICE

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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