Operation
Pressure Relief Procedure
WARNING
SKIN INJECTION HAZARD
The system pressure must be manually relieved to prevent the system from starting or spraying accidentally. Fluid
under high pressure can be injected through the skin and cause serious injury. To reduce the risk of an injury from injection, splashing fluid, or moving
parts, follow the Pressure Relief Procedure
whenever you:
Dare instructed to relieve the pressure, D stop spraying,
D check or service any of the system equipment, D install or clean the spray tip.
1.Engage the gun safety latch.
2.Open the bypass valve.
3.Turn the ignition key to OFF.
4.Disengage the gun safety latch. Hold a metal part of the gun firmly to the side of a grounded metal pail, and trigger the gun to relieve pressure.
5.Engage the gun safety latch.
6.Open the pressure drain valve, having a container ready to catch the drainage. Leave the valve open until you are ready to spray again.
If you suspect that the spray tip or hose is completely clogged, or that pressure has not been fully relieved after following the steps above, wrap a rag around the tip guard retaining nut or hose end coupling and VERY SLOWLY loosen the part to relieve pressure gradually, then loosen completely. Now clear the tip or hose.
1.Prepare the Fluid
a.Prepare the fluid according to the fluid manu- facturer’s recommendations.
b.Place the pump or suction tube into the fluid container.
10 308972
2.Starting the Sprayer
a.Open the bypass valve to make startup easier. In the open position, the valve lever is parallel to the body of the valve. See Fig 6. Close the filter drain valve.
b.Turn the pressure control knob counterclock- wise until all spring tension is relieved. You will be able to feel it. The sprayer is now set at the lowest pressure setting. Turning the knob fur- ther will cause it to fall off.
c.Attach fuel hose from tank.
d.If the engine is cold, close the choke by mov- ing the choke lever. See Fig 6.
3.Turn and hold the ignition key to START until you hear the engine “catch”, then release the key to RUN. See Fig 6. If the engine does not start, open the choke a little (move choke lever). If the engine floods, open the choke all the way and try again.
e.After the engine is warm, gradually open the choke lever (move choke lever) and close the bypass valve. See Fig 6.
CHOKE
ON/OFF
SWITCH
AIR FILTER 
PRESSURE
CONTROL
KNOB 
BYPASS
VALVE 
Fig 6 | 7874b |
|
NOTE: In cold weather, run the engine for about 15 minutes with the bypass valve open before starting the displacement pump, to help avoid hydraulic motor stalling.
f.Follow the Pressure Relief Procedure Warning on page 10, to shut off the sprayer.
WARNING
To stop the engine in an emergency, turn OFF
the ignition key. Close the bypass valve if possible. See Fig 6. Then follow the Pressure Relief Proce-