How To Repair Graco Airless Pump

Introduction

Follow this guide to disassemble and rebuild a leaky or chock-full pump for the Graco Pigment Sprayer, model 17C325.

Note: The pump'due south rebuild kit comes with four blackness leather packing O-rings. Soak them in a loving cup of SAE 30 motor oil for an 60 minutes before installing them in the pump.

As yous disassemble the pump, take the time to clean all the parts with soap, water, and a brush before reassembly, and replace whatever worn-out parts as needed, which are provided in the pump repair kit (part # 18B260).

• Before you lot begin, make certain to follow the pressure relief procedure documented in the user transmission before powering down the paint sprayer and disconnecting the pump.

• Apply your fingers to unscrew the jam nut securing the suction tube to the bottom of the pump.

• You may need to utilise groove joint pliers to loosen the nut.







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

• Use an adjustable wrench to loosen the intake valve on the pump.

• Do non completely unscrew and remove the intake valve. You will perform this in a later step.

• During reassembly, torque the intake valve to 70-fourscore ft. lbs.

• Employ your fingers to unscrew and loosen the connector securing the hose to the pump.

• You may demand to use groove joint pliers to loosen the connector.

• Once unscrewed, push the connector back to reveal the hose connexion.

• Apply your fingers to unscrew and loosen the jam nut securing the pump to the pigment sprayer.

• You may need to use a mallet to gently tap on the nut's teeth to loosen information technology.

• During reassembly, tap on the teeth using a mallet until the jam nut is snug.

• Lift up the pump rod encompass to reveal the pump'south connection to the paint sprayer.

• Pull the pump directly out of the drive 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 straight off of the pump.

• Remove the pump from the pigment sprayer.

• Unscrew and remove the intake valve from the pump cylinder.

• Utilise a pick tool to remove the metal brawl seat from the lesser of the intake valve.

• Tip the intake valve upside downwardly to remove the inlet ball.

• Replace the inlet brawl with the new inlet brawl included in the pump repair kit.

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

• Apply a pick 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 downwards and use a pick tool to remove the white gasket.

• This gasket doesn't need replaced, simply be sure to clean it before reinstallation.

• Identify the pump cylinder into a vise.

• Wrap the cylinder in a rag to preclude scratching the outside of the cylinder.

• Use a flathead screwdriver and mallet to unscrew and loosen the superlative jam nut.

• Keep unscrewing the top jam nut with your fingers to remove it.

• During reassembly, torque the superlative jam nut to 70-80 ft. lb.

• Use a pick tool to remove the black O-ring from the top jam nut.

• Supervene upon this O-ring with the new O-ring included in the pump repair kit.

• With the pump cylinder withal in the vise, use a mallet to gently tap down on the top 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.

• Utilise a pick tool to remove the black O-ring from the bottom of the pump cylinder.

• Replace this O-ring with the new O-band included in the pump repair kit.

• Use your fingers to grab and remove the white plastic gland from the top of the pump cylinder.

• If the gland doesn't hands come up out, skip to the next step.

• Supplant this plastic gland with the new plastic gland included in the pump repair kit.

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

• Lift upward the pump cylinder to remove the pharynx packing O-rings.

• At that place are a total of six O-rings stacked on top of each other. Take note of their orientation and order.

• Replace all vi 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 earlier reassembly.

• Utilise a 3/4" wrench to remove the piston valve bolt from the piston rod.

• You can secure the piston rod in a vise, or employ a nine/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.

• Note the orientation of the wiper bushing. The flat side should bespeak down.

• 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 hard 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.

• Supplant the piston brawl 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 elevation of each other, placed in between two metallic glands. Take annotation of their orientation and lodge.

• Replace the six O-rings with the new O-rings included in the pump repair kit.

• Replace 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 be soaked in SAE xxx motor oil for an hour earlier reassembly.

Conclusion

To reassemble your device, follow these instructions in opposite order.

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Source: https://www.ifixit.com/Guide/Graco+Paint+Sprayers+17C325+2015+Pump+Rebuild/130026

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