How To Repack Graco Paint Sprayer

Introduction

Follow this guide to detach and rebuild a leaky or clogged pump for the Graco Paint Sprayer, model 17C325.

Annotation: The pump's rebuild kit comes with 4 black leather packing O-rings. Soak them in a cup of SAE 30 motor oil for an hour before installing them in the pump.

Equally you disassemble the pump, have the time to clean all the parts with soap, water, and a brush before reassembly, and supervene upon whatever worn-out parts every bit needed, which are provided in the pump repair kit (part # 18B260).

Before you begin, make sure to follow the pressure relief procedure documented in the user manual before powering down the paint sprayer and disconnecting the pump.

Before you begin, brand sure to follow the pressure relief process documented in the user manual before powering down the pigment sprayer and disconnecting the pump.
Use your fingers to unscrew the jam nut securing the suction tube to the lesser of the pump.
You may need to apply groove articulation pliers to loosen the nut.

Pull the suction tube straight down to disconnect it from the bottom of the pump.

Pull the suction tube straight down to disconnect it from the lesser of the pump.

Use an adjustable wrench to loosen the intake valve on the pump.
Do not completely unscrew and remove the intake valve. You lot will perform this in a later on footstep.
During reassembly, torque the intake valve to 70-80 ft. lbs.

Use your fingers to unscrew and loosen the connector securing the hose to the pump.
You may demand to use groove articulation pliers to loosen the connector.
In one case unscrewed, push the connector back to reveal the hose connection.

Utilise your fingers to unscrew and loosen the jam nut securing the pump to the paint sprayer.
You lot may need to use a mallet to gently tap on the nut'southward teeth to loosen it.
During reassembly, tap on the teeth using a mallet until the jam nut is snug.

Lift up the pump rod cover to reveal the pump's connection to the paint sprayer.

Pull the pump straight out of the bulldoze housing.
The dorsum of the pump is still connected to a hose. You'll remove it in the next step.

Pull the rear pump hose directly off of the pump.
Remove the pump from the pigment sprayer.

Unscrew and remove the intake valve from the pump cylinder.

Use a selection tool to remove the metallic ball seat from the bottom of the intake valve.

Tip the intake valve upside down to remove the inlet brawl.
Replace the inlet brawl with the new inlet ball included in the pump repair kit.

Use a selection tool to remove the brawl seat washer from the bottom of the intake valve.

Use a option tool to remove the thin white O-ring at the bottom of the intake valve.
Replace this O-band with the new O-ring included in the pump repair kit.

Turn the intake valve upside down and employ a pick tool to remove the white gasket.
This gasket doesn't need replaced, but be certain to clean information technology earlier reinstallation.

Place the pump cylinder into a vise.
Wrap the cylinder in a rag to prevent scratching the outside of the cylinder.
Use a flathead screwdriver and mallet to unscrew and loosen the top jam nut.

Continue unscrewing the top jam nut with your fingers to remove it.
During reassembly, torque the top jam nut to lxx-lxxx ft. lb.

Use a pick tool to remove the blackness O-ring from the acme jam nut.
Replace this O-ring with the new O-ring included in the pump repair kit.

With the pump cylinder still in the vise, apply a mallet to gently tap downwards on the pinnacle of the piston rod to loosen it from the pump cylinder.

Remove the pump cylinder from the vise and pull the bottom of the piston rod completely out of the pump cylinder to remove it.

Use a choice tool to remove the black O-band from the lesser of the pump cylinder.
Replace this O-band with the new O-ring included in the pump repair kit.

Employ your fingers to catch and remove the white plastic gland from the top of the pump cylinder.
If the gland doesn't hands come out, skip to the next step.
Supersede this plastic gland with the new plastic gland included in the pump repair kit.

Flip the pump cylinder upside down and employ a flathead screwdriver and mallet to gently tap the throat packing O-rings, loosening them from the cylinder.

Elevator upwardly the pump cylinder to remove the pharynx packing O-rings.
In that location are a total of six O-rings stacked on superlative of each other. Have note of their orientation and order.
Supplant all half-dozen O-rings with the new O-rings included in the pump repair kit.
The black O-rings are leather, and the new replacements need to be soaked in SAE 30 motor oil for an hour before reassembly.

Use a 3/4" wrench to remove the piston valve commodities from the piston rod.
You can secure the piston rod in a vise, or use a 9/16" wrench to secure the bottom of the piston rod as you unscrew and loosen the bolt.
Remove the piston valve bolt from the piston rod.

Remove the wiper bushing from the piston valve bolt.
Notation the orientation of the wiper bushing. The apartment side should signal downward.
Replace the wiper bushing with the new wiper bushing included in the pump repair kit.

Use your fingers to remove the piston packing O-rings from the bottom of the piston rod.
If the O-rings are difficult to remove with your fingers, use a pair of groove joint pliers to remove them.

Tip the bottom of the piston rod over to remove the piston ball.
Replace the piston ball with the new piston ball included in the pump repair kit.
Non counting the wiper bushing, there are a total of five O-rings stacked on meridian of each other, placed in between two metal glands. Take note of their orientation and club.
Replace the vi O-rings with the new O-rings included in the pump repair kit.
Supplant the two metal glands with the new glands included in the pump repair kit.
The black O-rings are leather, and the new replacements need to exist soaked in SAE 30 motor oil for an hr before reassembly.