PROBLEM
DIAGNOSIS
REMEDY
Pump Runs Rough
Restricted inlet
Air leaks: air in plumbing
Check for proper size inlet
plumbing
Tighten plumbing; fix leaks;
insure an air tight seal
Make sure high pressure soap
valve is closed
Pump Pulsates
Stuck inlet or discharge valve
Inadequate water supply
Clean out foreign material
Replace worn valves
Check water supply for sufficient
flow and obstructions in inlet filter
Slight Water Leakage From
Underneath Pump
Worn packings
Install new packings
Packing Failure
Scored, damaged or worn
plunger
Overpressure to inlet manifold
Abrasive material in inlet water
Excessive minerals in water
Excessive temperature. or
pressure of inlet water
Replace plungers
Reduce inlet pressure
Install proper filtration
Soften inlet water
Reduce inlet water temperature
and/or pressure
No Water Comes Out
Nozzle plugged / clogged
Water hose kinked
Clean or replace nozzle
Un-kink hose
Oil Leak Between Pump Head
and Pump Transmission
Oil seal leaking
Chipped plunger
Replace oil seal
Replace plunger
Oil Leak From Bottom Or Back of
Motor
Shaft seal worn
Replace shaft seal
Water in Oil (Milky Color)
Worn packing
Water condensation in
transmission housing
Chipped plunger
Change packings
Change oil
Replace plunger and packings
7
Dirt Killer Pressure Washer Operator’s Manual
Version 1.1 - May 2015
