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Problem
Engine will not start.
No discharge at nozzle when trig-
ger mechanism is squeezed.
Low or fluctuating pressure.
Water is leaking from the "Heat
Dump Valve".
Oil appears milky or foamy.
Oil leaking from unit.
Detergent will not siphon into Low
Pressure Detergent mode.
Water flows back into detergent
container.
Water flows from the nozzle when
the trigger gun is locked in the
"OFF" position.
Troubleshooting
Cause
Various engine problems.
Unit components are frozen.
Inadequate water supply.
Kink in water inlet hose.
Kink in high pressure discharge
hose.
Water inlet screen obstructed.
Pump sucking air. (Prime eliminated)
Adjustable grip on dual lance is not
in high pressure mode.
Obstructed or worn spray nozzle.
Damaged or obstructed valve as-
sembly on pump.
Pump packing worn.
Bypass valve not operating correctly.
Water temperature is too high.
Defective valve.
Water in oil.
Do Not Use.
Detergent strainer is not completely
submerged in detergent solution.
Detergent strainer is obstructed.
Detergent hose cut, obstructed.
Detergent adjusting knob on pump
turned to closed position. (If appli-
cable.)
Adjustable grip on dual lance is not
in low pressure mode.
Nozzle assembly is plugged.
Too many high pressure hose exten-
sions attached to the water outlet.
Ball and Spring in Venturi stuck.
Ball and Spring in Venturi reversed,
missing or corroded.
Gun is malfunctioning.
Solution
Refer to the engine manual accom-
panying your unit.
Allow to thaw. If any part of the unit
becomes frozen; excessive pres-
sure may build up in the unit which
could cause the unit to burst result-
ing in possible serious injury to the
operator or bystanders.
Ensure hose is 3/4" (19.05mm) di-
ameter and incoming water supply
is turned on.
Remove kink.
Replace hose.
Remove screen, clean or replace.
Tighten all water intake connec-
tions. Eliminate leaks in intake line.
Insert a high pressure nozzle.
Remove, clean or replace.
Remove, inspect, clean or replace.
Replace packings.
Repair or replace.
Do not allow the unit to operate in
the bypass mode (with trigger gun
closed) for more than 3 minutes.
Replace.
Change pump oil. Fill to proper
level.
Contact Customer Service.
Check, submerge if necessary.
Inspect, clean or replace.
Inspect, clean or replace.
Open adjusting knob. Refer to
"Cleaning with Detergents" pg.15.
Insert 6540° (BLACK) nozzle.
Clean or replace.
Use one extension maximum.
Remove, clean or replace.
Remove, clean or replace.
Repair or replace.
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