Briggs & Stratton 1903 Purge Pump of Air Contaminants, Nozzle Maintenance, Ring Maintenance

Section 5: Maintenance

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 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 an 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 recess. 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 the spray gun and hold.

3.When water supply 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.Start engine according to instructions in “To Start Pressure Washer”.

3.Remove nozzle extension from spray gun.

4.Squeeze trigger on spray gun and hold.

5.When water supply is steady and constant, engage safety latch and reattach nozzle extension.

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 spray tip 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.Shut off engine and turn off water supply.

2.Remove spray tip from end of nozzle extension.

3.Remove in-line filter from other end of nozzle extension.

4.Use wire included in kit (or a small paper clip) to free any foreign material clogging or restricting spray tip (Figure 18).

Figure 18 — Nozzle Maintenance

Use wire here

to remove

debris.

5.Using a garden hose, remove additional debris by back flushing water through nozzle extension (Figure 19). Back flush between 30 to 60 seconds.

Figure 19 — Backflushing the Nozzle Extension

6.Reinstall spray tip and in-line filter into nozzle extension.

7.Reconnect nozzle extension to spray gun.

8.Reconnect water supply, turn on water, and start engine.

9.Test pressure washer by operating with each Quick Connect spray tips.

O–Ring Maintenance

Through the normal operation of your pressure washer, o–rings, which keep the connections of the hoses and spray gun tight and leak–free, may become worn or damaged.

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