Graco 17J878 Ball Knocker Kit

Compatible Machines for Graco 17J878 Ball Knocker Kit

The Graco 17J878 Ball Knocker Kit is an OEM replacement designed to maintain fluid flow by helping clear build-up around the inlet valve in your sprayer’s pump. By ensuring reliable push-prime action, it supports consistent spray pressure and reduces downtime caused by clogging or resistance. This part is engineered for use in multiple ProX series electric airless sprayers for dependable performance. :contentReference[oaicite:0]{index=0}

What’s Included in the 17J878 Kit

• Ball knocker assembly designed to dislodge buildup at the inlet valve
• Spring mechanism to provide responsive push-prime action
• Installation label for correct identification and alignment

Key Benefits of the 17J878 Ball Knocker Kit

• Restores push-prime function by clearing debris and improving valve action
• Enhances equipment uptime by reducing clog-related downtime
• OEM quality fit engineered for ProX17 and ProX19 sprayers
• Durable design stands up to jobsite conditions and repeated use

Installation Tips

Before installing the 17J878 kit, releive system pressure and remove fluid from the sprayer. Access the pump assembly, remove the old ball knocker and spring, and insert the new components. Ensure the label is positioned as per manufacturer guidance to maintain proper function and longevity.

Frequently Asked Questions