Flushing - Graco 231-316 Series C Instructions Manual

When to Flush
1. New Sprayer. This sprayer was factory tested in
lightweight 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
spirits.
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.
CAUTION
To prevent pump corrosion, never leave water or
any type of paint in the sprayer when it is not in use.
Pump the water or the paint out with mineral spirits.

Flushing

5. Storage.
Water base paint: flush with water, then mineral
spirits and leave the pump, hose and gun filled
with mineral spirits. Shut off the sprayer, remove
the spark plug cable, and open the pressure drain
valve to relieve the pressure. Leave the drain valve
open.
Oil base paint: flush with mineral spirits and leave
the pump, hose and gun filled with mineral spirits.
Shut off the sprayer, remove the spark plug cable,
and open the pressure drain valve to relieve the
pressure. Leave the drain valve open.
6. Startup after storage.
Before using water–base paint , flush out the
mineral 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.
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