Graco Inc EM390 instruction manual HOW to Flush

HOW TO FLUSH

1.Relieve pressure. See page 16.

2.Remove the filter bowl and screen; see instruction manual 307±273, supplied. Clean the screen sepa- rately and install the bowl (only) to flush it. See Fig 14±1.

3.Close the pressure drain valve.

4.Pour one±half gallon (2 liters) of compatible solvent into a grounded metal pail. Put the suction tube in the pail.

5.Remove the spray tip from the gun.

WARNING

To reduce the risk of static sparking and splashing when flushing, always remove the spray tip from the gun, and hold a metal part of the gun firmly to the side of, and aimed into, a grounded metal pail

6.Disengage the trigger safety latch. Point the gun into a grounded metal waste container. With metal part of the gun firmly touching the metal container, squeeze the gun trigger. See Fig 14±2. This procedure re- duces the risk of static sparking and splashing. Start the sprayer, trigger the gun, and slowly turn the pres- sure adjusting knob clockwise just until the pump starts. Keep the gun triggered until clean solvent comes from the nozzle. Release the trigger and en- gage the trigger safety latch.

7.Check all fluid connections for leaks. If any connec- tions leak, first relieve the pressure. Tighten the con- nections. Start the sprayer. Recheck the connections for leaks.

8.Remove the suction tube from the pail. Disengage the trigger safety latch. Trigger the gun to force solvent from the hose. Do not run the pump dry for more than 30 seconds to avoid damaging the pump packings! Relieve the pressure.

9.Unscrew the filter bowl and reinstall the clean screen. Reinstall the bowl, hand tight only.

10.Remove the suction tube assembly and clean it sepa- rately. Flushing alone may not thoroughly clean these parts.

11.If you flushed with mineral spirits and are going to im- mediately use a water-base paint, flush with soapy water followed by a clean water flush. If you are stor- ing the sprayer, leave the mineral spirits in it. Relieve pressure.

12.Leave the pressure drain valve open until you are ready to use the sprayer again.

SCREEN

FILTER

BOWL

FILTER

SUPPORT

PRESSURE

DRAIN VALVE

Fig 14±1 0671

GROUND

WIRE

MAINTAIN FIRM

METAL-TO-METAL

CONTACT BETWEEN

GUN AND GROUNDED

METAL CONTAINER

Fig 14±2 0664

14307-724