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Generac Portable Products 1900 PSI Pressure Washer
12
2. Pull spray gun trigger and hold.
3. When water stream is steady and constant, engage safety
latch.
To remove contaminants from the pump, follow
these steps:
1. Set up pressure washer as described in “Preparing
Pressure Washer For Use”. Connect water supply and
turn water on.
2. Remove nozzle extension from spray gun.
3. Start engine according to instructions in engine owner’s
manual.
4. Squeeze spray gun trigger and hold.
5. When water stream is steady and constant, engage safety
latch and reattach nozzle extension.
Check In-Line Filter
Refer to Figure 9 and service the in-line filter if it becomes
clogged, as follows:
1. Detach spray gun and nozzle extension from high
pressure hose. Detach nozzle extension from spray gun
and remove o-ring and screen from nozzle extension.
Flush screen, spray gun, and adjustable nozzle extension
with clean water to clear debris.
2. If screen is damaged, o-ring kit contains a replacement
in-line filter screen and o-ring. If undamaged, reuse
screen.
3. Place in-line filter screen into threaded end of nozzle
extension. Direction does not matter. Push screen in
with eraser end of pencil until it rests flat at bottom of
opening.Take care to not bend screen.
4. Place o-ring into threaded end of nozzle extension. Push
o-ring snugly against in-line filter screen.
5. Assemble nozzle extension to spray gun, as described
earlier in this manual.
Cleaning Chemical Injection Hose
If you used the chemical injection hose, you must flush it
with clean water before stopping the engine.
1. Place chemical injection hose in a bucket full of clean
water.
2. Slide adjustable nozzle forward to low pressure
position. Flush for 1-2 minutes.
3. Shut off engine.
IMPORTANT: Simply shutting OFF engine will not
release pressure in the system. When the engine has
shut down, squeeze the trigger on the spray gun to
relieve the pressure in the hose.
Nozzle Maintenance
A pulsing sensation felt while squeezing the spray gun
trigger may be caused by excessive pump pressure.The
principal cause of excessive pump pressure is a orifice
clogged or restricted with foreign materials, such as dirt,
etc.To correct the problem, immediately clean the orifice
using the tools included with your pressure washer and
follow these instructions:
1. Shut off engine and turn off water supply.
2. Detach nozzle extension from spray gun.Twist nozzle
clockwise to stream position. Using 2mm (5/64) allen
wrench, remove orifice from end of nozzle extension
(Figure 10).
3. Remove in-line filter from other end of nozzle extension.
4. Use wire (or small paper clip) to free any foreign
material clogging or restricting orifice (Figure 10).
Nozzle Extension
Filter Screen
O-ring
Figure 9 — Clean In-Line Filter
Orifice
Figure 10 — Removing and Cleaning Orifice