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97-707 • BG • REV. 2/07
11
PRESSURE WASHER Troubleshooting Guide
PROBLEM POSSIBLE CAUSE SOLUTION
LOW OPERATING
PRESSURE
Insufficient water supply. Closed
faucet
Use larger garden hose; clean inlet water
screen. Open faucet.
Old, worn or incorrect spray
nozzle
Match nozzle number to machine and/or
replace with new nozzle.
Plumbing or hose leak Check plumbing system for leaks. Re-tape
leaks with teflon tape.
Faulty or mis-adjusted unloader
valve
Adjust unloader for proper pressure. Install
repair kit when needed. Call technical support.
Worn packing in pump Replace packing.
Machine has been stored in
freezing temperatures
Thaw out machine completely, including hose,
spray gun and wand.
Slow engine RPM Contact local distributor.
FLUCTUATING
PRESSURE
Worn pump valves Replace valves.
Dirt in pump valves Clean and inspect valves.
Pump sucking air Check all pump lines and connections.
PRESSURE LOW
AFTER PERIOD OF
NORMAL USE
Nozzle worn Replace nozzle.
Unloader valve worn Replace unloader valve.
ENGINE WILL NOT
START OR STOPS
WHILE OPERATING
Low oil shutdown
Fill engine with oil.
ENGINE IS
OVERLOADED
Nozzle partially blocked Clean nozzle.
Excessive pressure from high
engine RPM
Adjust engine throttle to lower RPM.
WATER OR OIL
LEAKING FROM
BOTTOM OF PUMP
A small amount of leaking is
normal
If excessive leaking occurs, call technical sup-
port.
PRESSURE
INCREASES WHEN
SPRAY GUN IS
CLOSED
Unloader valve not operating
properly
Call technical support.
PRESENCE OF
WATER
IN PUMP OIL
Water sprayed at machine Change oil. Direct spray away from machine.
High humidity in air Check and change oil twice as often.
Piston packing worn. Oil seal
worn
Replace packing and oil seals.
TROUBLESHOOTING