If your Graco 390, 395, 490, 495, or 595 airless sprayer is leaking or losing pressure, you might be facing a costly repair bill at the local service shop. But here’s a pro secret: you can replace the entire pump assembly yourself in under 15 minutes.
Is it time for a new pump assembly?
Check for these 3 red flags:
- Constant Pressure Loss: Your sprayer takes too long to prime or can't maintain a consistent spray pattern.
- Fluid Leakage: You see paint leaking from the bottom of the pump cylinder.
- Loud "Knocking" Noises: A sign that the internal piston or packings are worn out.
The 5-Step Replacement Guide
- Safety First: Turn off the power and release all pressure from the hose and gun.
- Remove the Old Pump: Unscrew the suction hose and the high-pressure outlet. Use a wrench to loosen the two mounting bolts on the sprayer frame.
- Slide Out the Piston: Gently pull the old pump assembly down. Make sure the connecting rod is at its lowest point for easier removal.
- Install the ProSpray Replacement: Apply a light coat of TSL (Throat Seal Liquid) to the new piston. Slide the new assembly into place and tighten the mounting bolts.
- Reattach & Test: Reconnect your suction and outlet hoses. Prime the machine with water or solvent to check for a perfect seal.
Why Choose ProSprayDirect Aftermarket Parts?
An original Graco pump assembly can cost upwards of $400. At ProSprayDirect, we source our parts directly from the same high-precision factories, offering you the same performance for less than half the price.
?? EXCLUSIVE OFFER
Ready to restore your sprayer to factory performance? Use code WELCOME15 at checkout for an extra 15% OFF your first order!
SHOP REPLACEMENT PUMP ($59.00)