17
SYMPTOM
PROBABLE CAUSE
REMEDY
Engine will not
start
Various engine problems
Refer to the Engine Manual accompanying your
unit.
Unit components are frozen.
Allow to thaw. If any part of the unit becomes
frozen; excessive pressure may build up in the
unit. This can cause the unit to burst, resulting
in possible serious injury to the operator or
bystanders.
No discharge
at nozzle
when trigger
mechanism is
squeezed.
Inadequate water supply.
Ensure hose is 3/4” diameter and incoming water
supply is turned on. Ensure the water is turned all
the way on.
Low or
fluctuating
pressure.
Kink in water inlet hose.
Remove kink.
Water inlet screen obstructed.
Remove screen, clean, or replace.
Pump sucking air. (Prime
eliminated)
Tighten all water intake connections Eliminate leaks
in intake line.
Incorrect nozzle installed on gun. Insert high pressure nozzle.
Obstructed or worn spray nozzle. Remove, clean or replace.
Damaged or obstructed valve
assy. on pump.
Remove, clean or replace.
Pump packings worn.
Replace packings.
Unloader/bypass valve not
operating correctly.
Repair or replace.
Water is leaking
at safety relief
valve.
Unloader malfunction.
Detect and correct unloader problem.
Pressure switch malfunction.
Detect and correct pressure switch problem.
Safety relief valve is defective.
Replace safety relief valve. NEVER run unit
without safety relief valve. Doing so can cause an
explosion!
Oil appears
milky or foamy.
Water in oil.
Change pump oil. Fill to proper level.
Oil leaking from
unit.
Worn seals or o-rings.
Consult customer service.
Detergent will
not siphon
Detergent strainer is not
completely submerged in
detergent solution.
Check, submerge if necessary.
Detergent strainer obstructed.
Inspect, clean, or replace.
Detergent hose cut, obstructed
or kinked.
Inspect, clean, or replace.
Detergent adjusting knob turned
to closed position.
Open adjusting knob. Refer to “Cleaning with
Detergents”.
Nozzle assembly is plugged.
Clean or replace.
Water flows
back into
detergent
container.
Ball & spring in Venturi reversed,
missing, or corroded.
Remove, clean, or replace.
TROUBLESHOOTING