Graco 2900 psi - Manual (Page 5)

308524 5
Pressure Relief Procedure
INJECTION HAZARD
The system pressure must be manually
relieved to prevent the system from
spraying accidentally. To reduce the risk
of an injury from accidental spray from the gun,
splashing fluid, or moving parts, follow the
Pressure Relief Procedure when you
D Are instructed to relieve the pressure
D Stop spraying for more than 10 minutes
D Check or service any of the system equipment
D Install or clean the spray nozzle
WARNING
1. Engage the trigger safety latch.
2. Turn off the pressure washer, and remove the
ignition cable from the spark plug.
3. Shut off the water supply.
4. Disengage the trigger safety latch, trigger the gun
to relieve the pressure, and engage the trigger
safety latch.
If you suspect that the spray tip or hose is clogged or
that pressure has not been fully relieved after following
the steps above: Disengage the trigger safety latch,
and trigger the gun to relieve pressure. Wrap a rag
around the hose end coupling, and VERY SLOWLY
loosen the coupling to relieve pressure gradually. Then
loosen it completely. Then clear the tip or hose.
Operation
Startup
Always use this startup procedure to ensure that the
pressure washer is started safely and properly.
D Always engage the gun trigger safety latch when
you stop spraying even for a moment. This reduces
the risk of fluid injection or splashing in the eyes or
on the skin if the gun is bumped or triggered
accidentally.
D Always observe the CAUTIONS in this section to
avoid costly damage to the pressure washer.
D If you use the Sandblaster Kit, see the Sandblaster
Kit manual for detailed cleaning information.
D See manual 308513 for chemical injector operation
and service.
1. Check the oil level.
NOTE: This pressure washer is equipped with a
low-oil sensor that shuts the engine off if the oil level
falls below a certain level. If the engine stops
unexpectedly, check the oil and the fuel levels. Check
the oil level each time you refuel.
2. Check the fuel level.
FIRE HAZARD
Do not refuel a hot engine. Refueling a
hot engine could cause a fire. Use only
fresh, clean, regular or unleaded gasoline. Close
the fuel shutoff valve during refueling.
WARNING
3. Turn on the water supply.
CAUTION
Never run the pressure washer dry. Costly
damage to the pump will result. Always be sure
the water supply is completely turned on before
you run the pressure washer.
4. Trigger the gun until water sprays from the tip
indicating that the air is purged from the system.
5. Open the fuel shutoff valve. Be sure the spark plug
ignition cable is pushed firmly onto the spark plug.
Put the engine switch in the ON position, and put
the throttle in the RUN position.
Do not allow the pressure washer to idle for more
than 10 minutes. Doing so may cause the
recirculating water to overheat and seriously
damage the pump. Turn off the pressure washer if
it will not be spraying or cleaning at least every 10
minutes. If heated inlet water is used, reduce this
time further. Do not operate the pressure washer
with the inlet water screen removed. This screen
helps keep abrasive sediment, which could clog
the pump or damage the pump cylinders, out of the
pump. Keep this screen clean. Do not pump
caustic materials; such materials could corrode the
pump components.
CAUTION