Grizzly H8189/H8190 - Manual (Page 14)

-12-
H8189/H8190 Gasoline Pressure Washer
Break-In
The first 20 hours of operation is condistered the
break-in period. Be sure to follow the maintainence
schedule on
Page 16 avter 20 hours of use.
NOTICE
Failure to follow the break-in maintenance
schedule can reduce the lifespan of
the machine and negatively impact
performance.
Adjusting Pressure
DO NOT attempt to increase the pump
pressure by tampering with controls or
otherwise altering the machine. A higher
pressure setting than the factory set pressure
may damage the pump or cause components
to fail resulting in serious personal injury.
The pressure setting on the model H8189/H8190
was preset at the factory to achieve optimum
pressure for general purpose cleaning. If you need
to lower the pressure, it can be accomplished by
these methods:
• BACK AWAY FROM THE SURFACE TO BE
CLEANED. Moving further away reduces the
pressure on the workpiece.
• SELECT A DIFFERENT NOZZLE. Nozzles
with a wider angled spray deliver a less
powerful stream.
• ADJUST THE PRESSURE REGULATOR
ON THE PUMP. Turn the pressure regulator
knob counter-clockwise to lower the pressure
(
Figure 6). Once you have finished using
your pressure washer, return the regulator to
its original position by turning it clockwise.
Figure 6. Reducing the pump pressure.
• REDUCE ENGINE SPEED. Slowing the
engine will reduce the pressure created by
the pump.
NOTICE
Engine speed should always be set high
enough to handle the load of the pump. If
the engine speed is too low, the motor may
bog or stop when the spray gun trigger is
pulled and the pump is activated. Operating
the engine speed at such a setting can
cause excessive engine wear and premature
engine failure.
The model H8189/H8190 pressure washer is
equipped with five spray nozzles located in
receptacles on the front panel. Each nozzle is
color coded and delivers a specific spray pattern
for a particular cleaning purpose. The size of the
nozzle determines the shape and pressure of the
spray. The 0°, 15°, 25°, and 40° nozzles are high
pressure nozzles; the chemical nozzle is a low
pressure nozzle.
To change nozzles on the H8189/H8190:
1. FOLLOW THE SHUTDOWN PROCEDURE
ON PAGE 14!
Changing Nozzles
Water Pressure
Adjustment Knob