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Shelley SantosSep 8, 2025
Why is the displacement pump output low on the upstroke of my Graco GM 5000?
- NNicolas ReynoldsSep 8, 2025
If the displacement pump output is low on the upstroke of your Graco Paint Sprayer, several factors could be responsible. First, check the pump inlet screen for any clogs and clean it if necessary. If the piston ball check is not seating correctly, it requires servicing. Additionally, inspect the piston packings for wear or damage and replace them if needed. Lastly, a worn or damaged sleeve gasket in the displacement pump could be the cause, and it should be replaced.