Cleaning Chemical Injection Hose

Generac Portable Products 1900 PSI Pressure Washer

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.

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

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:

Figure 9 — Clean In-Line Filter

Filter Screen

Nozzle Extension

O-ring

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.

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).

Figure 10 — Removing and Cleaning Orifice

Orifice

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).