Troy-Bilt 20207 manual Purge Pump of Air and Contaminants, Nozzle Maintenance, Orifice

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 the screen, spray gun, and adjustable nozzle extension with clean water to clear debris.

2.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.

3.Place o-ring into recess. Push o-ring snugly against in-line filter screen.

4.Assemble nozzle extension to spray gun.

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.

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 “How To Use Pressure Washer”.

4.Squeeze trigger on spray gun and hold.

5.When water supply is steady and constant, engage safety latch and refasten 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 nozzle clogged or restricted with foreign materials, such as dirt, etc.To correct the problem, immediately clean the orifice following these instructions:

1.Shut off engine and turn off water supply.

2.Remove orifice from end of nozzle extension. Separate nozzle extension from spray gun.Twist nozzle clockwise to stream position. Using a 2mm (5/64) allen wrench, remove orifice from end of nozzle extension (Figure 13).

Figure 13 — Removing and Cleaning Orifice

Orifice

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

4.Use a small paper clip to free any foreign material clogging or restricting orifice (Figure 13).

5.Using a garden hose, remove additional debris by back flushing water through nozzle extension (Figure 14). Back flush between 30 to 60 seconds.Turn adjustable nozzle extension to stream spray and move nozzle from low to high while flushing.

Figure 14 — Backflushing the Nozzle

6.Reinstall orifice and in-line filter into nozzle extension. DO NOT overtighten orifice with allen wrench.

7.Reconnect nozzle extension to spray gun.

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

9.Test pressure washer by operating with nozzle in high and low positions.

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