Displacement pump operates, but output is low.

  • Service the piston ball check.


  1. Service the ball check.
  1. Tighten packing nut or replace seals.


  1. Sevice the inlet ball check.


  1. Tighten clamps.


  1. Clean the fluid hose on the applicator.


  1. Remove and clean out the inlet tube asseblies.


  1. Reduce length or increase hose diameter.