DeVillbiss Air Power Company 3540CWHP, D20249 owner manual Maintenance, Engine Pump

MAINTENANCE

WHEN DOING MAINTENANCE, YOU MAY BE EXPOSED TO HOT SURFACES, WATER PRESSURE, MOVING PARTS, OR FIRE RESULTING IN DEATH. BEFORE PERFORMING ANY MAINTENANCE OR REPAIR, DISCONNECT SPARK PLUG WIRE, LET ENGINE COOL AND RELEASE ALL WATER PRES- SURE. THE ENGINE CONTAINS FLAMMABLE FUEL. DO NOT SMOKE OR WORK NEAR OPEN FLAMES WHILE PERFORMING MAINTENANCE.

To ensure efficient operation and longer life of your pressure washer, a routine maintenance schedule should be prepared and followed. The following routine maintenance schedule is geared to an unit in a normal working environment. If necessary, the schedule should be modified to suit the conditions under which your pressure washer is used. The modifications will depend upon the hours of operation and the working environment. If the pressure washer is in an extremely dirty and/or hostile environment it will require a greater frequency of all maintenance checks.

ENGINE

1.Consult Engine Owner's Manual for manufacturer's recommendations for any and all engine mainte- nance.

PUMP

The Annovi Reverberi (AR) pump on your pressure washer was shipped from the factory with oil. The oil in your pump must be changed after the first 10 hours of use and every 50 hours thereafter.

To Check Oil:

Oil Fill
	Sight
Plug
	Glass

Side

Drain

Plug

Bottom Drain Plug (underneath pump)

1.For units with sight glass:

a.If oil level is low, add oil so oil level is midway between high and low marks on sight glass.

b.If oil level is high, remove excess oil so oil level is midway between high and low marks on sight glass.

2.For units with dipstick:

a.Remove dipstick from pump and wipe clean.

b.Insert dipstick fully into pump, then remove it.

c.Oil level is correct when oil covers the lower 1/2 inch of end of dipstick.

To Change Oil:

1.Remove drain plug using one of the methods below:

a.If your AR pump has a side drain plug, use a 17 mm wrench to remove the plug and drain the pump.

b.If your AR pump does not have a side drain plug, drain the pump by removing the bottom drain plug on the underside of the pump with an 8 mm Allen wrench.

2.Drain oil into a suitable container.

3.Replace oil drain plug and tighten securely.

4.Remove oil fill plug (or dipstick).

5.Add 18.5 oz of 30W non-detergent oil to pump.

6.Replace oil fill plug and tighten securely.

HOW TO CLEAN THE NOZZLES

If a spray nozzle becomes clogged with foreign material such as dirt, excessive pump pressure may develop and the spray pattern will change. If a nozzle becomes partially clogged or restricted, the pump pressure will pulsate. If this happens, clean the nozzle immediately using the nozzle cleaning kit supplied with your pressure washer. The procedure is as follows:

1.Shut off pressure washer and turn off water supply.

2.Pull trigger on spray gun to relieve any water pressure.

3.Disconnect quick connect wand from spray gun.

4.Remove nozzle from wand.

5.Inspect nozzle for obstructions, grime, or any foreign matter that could restrict flow of water.

6.Remove any obstructions with nozzle cleaning tools provided and back flush with clean water.

7.Direct water supply into nozzle end for 30 seconds to back flush loosened particles.

8.Take this opportunity to inspect wand for obstruc- tions. Back flush wand if obstructions are seen.

9.Reassemble nozzle to wand.

10.Reconnect wand to spray gun and turn on water supply.

11.Start pressure washer and test spray pattern. See Nozzles in Operation section.

12.If spray pattern is still incorrect, replace nozzle.

15 — ENG D20249