Generac Power Systems Pro 6712, Operator'S Manual

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Maintenance and Troubleshooting
Owner’s Manual for Power Washer 13
Figure 4-1.Test Spray Gun (typical)
Nozzle Maintenance
A pulsing sensation felt when squeezing spray
gun trigger may be caused by excessive
pump pressure. Typical causes of excessive
pump pressure are nozzle clog or restriction.
Immediately clean nozzle as follows:
1. Turn engine and water supply OFF.
NOTE: Keep high-pressure hose connected
to pump and spray gun while system is
pressurized.
2. Relieve spray gun water pressure.
3. Remove nozzle from lance.
4. See
Figure 4-2 . Use a paper clip to remove
debris.
5. See Figure 4-3 . Remove lance from spray
gun and back flush thoroughly.
6. Install nozzle on lance.
7. Install lance on spray gun.
Figure 4-2.Remove Debris
Figure 4-3.Back Flush Lance
8. Verify hose is connected to pump water
inlet, and high-pressure hose is connected
to spray gun and pump.
9. Turn water ON.
10. Start engine.
11. Test power washer by operating with each
quick connect nozzle.
Change Pump Oil
1. Clean area around oil drain plug ( Figure 2-
1 ).
2. Place a small pan under oil drain plug to
catch oil.
3. Remove oil drain plug. Drain oil
completely.
4. Install oil drain plug. Do not over tighten.
5. Clean area around pump oil dipstick.
6. Fill pump with SAE 15W40 non-detergent
oil. Oil level must be within markings on
dipstick ( Figure 2-5 ). Do not overfill.
7. Install oil dipstick until finger tight.
8. Clean up any spilled oil.
Figure 4-4.Drain Pump Oil
Figure 4-5.Pump Oil Dipstick
Belt Replacement
It may be necessary to replace belt if it breaks
or if there is a sudden loss of pressure:
1. Remove belt guard
2. See
Figure 4-6 . Loosen nuts (A) and
tensioning bolt (B).
000123
(000106b)
Fluid Injection. This machine produces
high-pressure fluid streams that can pierce
skin. Fluid injection could result in death or
serious injury.
WARNING
000109
000131
000275
000268