Troubleshooting
24 334641E
Pump output is low Pump rod damage. Repair pump. See pump manual.
Low stall pressure. Turn pressure knob fully clockwise.
Make sure pressure control knob is
properly installed to allow full
clockwise position. If problem
persists, replace pressure transducer.
Piston packings are worn or
damaged.
Replace packings. See pump manual.
O-ring in pump is worn or damaged. Replace o-ring. See pump manual.
Intake valve ball is packed with
material.
Clean intake valve. See pump
manual.
Large pressure drop in hose with
heavy materials.
Reduce overall length of hose.
Check extension cord for correct size. See Extension Cords, page 8.
Motor runs but pump does not stroke Connecting rod assembly damaged.
See pump manual.
Replace connecting rod assembly.
See pump manual.
Gears or drive housing damaged. Inspect drive housing assembly and
gears for damage and replace if
necessary.
Excessive paint leakage into throat
packing nut
Throat packing nut is loose. Remove throat packing nut spacer.
Tighten throat packing nut just
enough to stop leakage.
Throat packings are worn or
damaged.
Replace packings. See pump manual.
Displacement rod is worn or
damaged.
Replace rod. See pump manual.
Fluid is spitting from gun Air in pump or hose. Check and tighten all fluid
connections. Cycle pump as slowly as
possible during priming.
Spray tip is partially clogged. Clear tip. See Clear Spray Tip Clog,
page 16.
Fluid supply is low or empty. Refill fluid supply. Prime pump. See
pump manual. Check fluid supply
often to prevent running pump dry.
Problem
What to Check
If check is OK, go to next
check
What to Do
When check is not OK,
refer to this column
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