Generac Power Systems 1540-0 Owner's Manual page 12

Check Gun and Nozzle Extension
Examine the hose connection to the spray gun and make
sure it is secure. Test the trigger by pressing it and making
sure it springs back into place when you release it. Put the
safety latch in the on position and test the trigger. You
should not be able to press the trigger.
Check In-Line Filter
Refer to Figure 8 and service the in-line filter if it becomes
clogged, as follows:
Figure 8 — Clean In-Line Filter
Nozzle Extension
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, the 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 a 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.
Purge Pump of Air and
Contaminants
To remove air 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. Pull trigger on spray gun and hold.
3. When water supply is steady and constant, engage
safety latch.
Generac Portable Products 3500 PSI Pressure Washer
To remove contaminants from the pump, follow
these steps:
1.
2.
3.
4.
5.
Nozzle Maintenance
Filter Screen
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 spray tip
O-ring
clogged or restricted with foreign materials, such as dirt,
etc. To correct the problem, immediately clean the spray
tip using the tools included with your pressure washer and
follow these instructions:
1.
2.
3.
4.
5.
12
Set up pressure washer as described in "Preparing
Pressure Washer For Use". Connect water supply and
turn water on.
Start engine according to instructions in "To Start
Pressure Washer".
Remove nozzle extension from spray gun.
Squeeze trigger on spray gun and hold.
When water supply is steady and constant, engage
safety latch and reattach nozzle extension.
Shut off engine and turn off water supply.
Remove spray tip from end of nozzle extension.
Remove in-line filter from other end of nozzle
extension.
Use wire included in kit or a small paper clip to free
any foreign material clogging or restricting spray tip
(Figure 9).
Figure 9 — Nozzle Maintenance
Use wire here
to remove
debris.
Using a garden hose, remove additional debris by back
flushing water through nozzle extension (Figure 10).
Back flush between 30 to 60 seconds.
Figure 10 — Backflush Nozzle Extension