Hitachi EM 490 dimensions Flushing Guidelines, When To Flush, How To Flush, Startup after storage

FLUSHING GUIDELINES

NOTE: The Pressure Relief Procedure Warning is on page 14.

When To Flush

CAUTION

NEVER leave water in the sprayer if there is the slightest change it could freeze. Flush out the water with mineral spirits. If water freezes in the pressure control tube, it prevents the sprayer from being started, and causes serious damage to the pres- sure control.

1.New Sprayer. The sprayer was factory tested in light- weight oil,which was left in to protect the pump parts.

Before using water-base paint, flush with mineral spirits, followed by a soapy water flush, and then a clean water flush.

Before using oil-base paint, flush with mineral spir- its, only.

2.Changing Colors. Flush with a compatible solvent such as mineral spirits or water.

3.Changing from water-base to oil-base paint. Flush with warm, soapy water, then mineral spirits.

4.Changing from oil-base to water-base paint.Flush with mineral spirits, followed by warm, soapy water, and then a clean water flush.

5.Storage.

Water-base paint: Flush with water, and then miner- al spirits. Leave the pump, hose and gun filled with mineral spirits. Shut off the sprayer and open the pressure drain valve to relieve pressure.

Oil-base paint: Flush with mineral spirits. Shut off and unplug the sprayer, open the pressure drain valve to relieve pressure.

6.Startup after storage.

Before using water-base paint, flush out the miner- al spirits with soapy water, and then with clean water.

When using oil-based paint, flush out the mineral spirits with the paint to be sprayed.

SCREEN

FILTER

BOWL

PRESSURE

DRAIN VALVE

FILTER

SUPPORT

How To Flush

1.Relieve pressure.

2.Remove the filter bowl and screen; see instruction manual 307±273, supplied. Clean the screen sepa- rately and install the bowl, without the screen, to flush the bowl. See Fig 7.

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 gun safety latch. Point the gun into a metal waste container. With metal part of the gun firmly touching the metal container, squeeze the gun trigger. See Fig 8. This procedure reduces the risk of static sparking and splashing. Start the sprayer, trigger the gun, and slowly turn the pressure adjusting knob clock- wise just until the pump starts. Keep the gun triggered until clean solvent comes from the nozzle. Release the trigger and engage the gun safety latch.

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

8.Remove the suction tube from the pail. Disengage the gun 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! Re- lieve pressure.

9.Leave the pressure drain valve open until you are ready to use the sprayer again. Unscrew the filter bowl and reinstall the clean screen. Reinstall the bowl, hand tight only.

10.If you flushed with mineral spirits and are going to use a water-base paint, flush with soapy water followed by a clean water flush. Relieve pressure.

GROUND

WIRE

MAINTAIN FIRM

METAL-TO-METAL

CONTACT BETWEEN

GUN AND GROUNDED

METAL CONTAINER

Fig 7 Fig 8

12307-735