John Deere 3800 - Manual (Page 19)

Service Pressure Washer - 15
SERVICE PRESSURE WASHER
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 following these instructions:
1. Shut off engine and turn off water supply.
2. ALWAYS point spray gun in a safe direction, press red
button and squeeze spray gun trigger to release retained
high water pressure.
3. Remove spray tip from end of nozzle extension.
4. Use a small paper clip to free any foreign material clogging
or restricting spray tip (A).
5. Remove nozzle extension from spray gun.
6. Using a garden hose, remove additional debris by back
flushing water through nozzle extension. Back flush between
30 to 60 seconds.
7. Reinstall spray tip into nozzle extension.
8. Reconnect nozzle extension to spray gun.
9. Make sure garden hose is connected to water inlet. Check
that high pressure hose is connected to spray gun and
pump. Turn on water.
10. Start engine following instructions How to Start Your
Pressure Washer.
11. Test pressure washer by operating with each quick connect
spray tip.
O-Ring Maintenance
Purchase an O-Ring / Maintenance Kit, Model 6048, by contacting
the nearest authorized dealer. It is not included with the pressure
washer. This kit includes replacement o-rings, rubber washer and
water inlet filter. Refer to the instruction sheet provided in the kit
to service your unit’s o-rings.
Pump Oil Maintenance
Changing Pump Oil
Change oil after first 50 hours of operation and then every
200 hours or 3 months, whichever occurs first.
NOTE: When changing pump oil, use only high quality
nondetergent 30 weight oil. Use no special additives.
Change pump oil as follows:
1. Clean area around brass oil drain plug at bottom of pump.
2. Remove oil drain plug. Drain oil completely into an
approved container.
3. When oil has completely drained, install oil drain plug and
tighten firmly.
4. Clean area around pump oil dipstick. Remove dipstick and
fill pump with recommended oil (approximately 9.6 oz.) to
“Full” mark on dipstick.
5. Install pump oil dipstick.
6. Wipe up any spilled oil.
Engine Maintenance
See the engine operator’s manual for instructions on how to
properly maintain the engine.
KEEP OUT OF REACH OF CHILDREN. DON’T POLLUTE.
CONSERVE RESOURCES. RETURN USED OIL TO
COLLECTION CENTERS.
A
WARNING
The high pressure stream of water that this
equipment produces can cut through skin and its
underlying tissues, leading to serious injury and
possible amputation.
Spray gun traps high water pressure, even when
engine is stopped and water is disconnected, which
can cause injury.
• Keep high pressure hose connected to pump and spray gun while
system is pressurized.
• ALWAYS point spray gun in safe direction, press red button and
squeeze spray gun trigger, to release high pressure, every time you
stop engine.
WARNING
The high pressure stream of water that this
equipment produces can cut through skin and its
underlying tissues, leading to serious injury and
possible amputation.
• NEVER repair leaking connections with sealant of any kind. Replace
o-ring or seal.
CAUTION
Avoid prolonged or repeated skin contact with used motor oil.
• Used motor oil has been shown to cause skin cancer in certain
laboratory animals.
• Thoroughly wash exposed areas with soap and water.