Graco g250 User Manual

Residue build-up may cause the meter gears to bind or 
stop rotating, which decreases the meter accuracy and 
makes meter recalibration necessary. As more build-up 
occurs, recalibration is required more often. 

The frequency that your meter requires cleaning 
depends on the type of fluid being used. Excessive resi-
due build-up usually means that you are using improper 
cleaning solvents and/or cleaning sequences or pro-
cesses.

•

Check the meter routinely to develop the correct 
cleaning schedule. 

•

Use the proper cleaning solvent for the fluid being 
metered.

Flush the fluid supply line and meter fluid reservoir daily 
with a compatible solvent as instructed below.

1.

Follow the Pressure Relief Procedure, on page 7.

2.

Connect the fluid line to the solvent supply unit.

3.

Flush the meter until it is clean.

4.

Follow the Pressure Relief Procedure, then dis-
connect the fluid line from the solvent supply unit.

5.

Reconnect the fluid line to the fluid (paint) supply.

6.

Turn on the fluid supply.

7.

Operate until the meter and fluid line are free of sol-
vent.

If the meter is not installed in an instrinsically safe 
location, make sure the power is off or the electronic 
sensor is disconnected before wiping the outside of 
the meter clean with a cloth dampened in a compati-
ble solvent or flushing the meter.

Do not immerse the meter in solvent with the elec-
tronic sensor installed. Solvent could damage the 
electrical components.

Air purge is not recommended for any gear-type flow 
meter. Air purges do not provide the lubrication the 
meter gears require.