When To Flush - Graco EM 390 Instructions And Parts List

NOTE: The Pressure Relief Procedure Warning is on
page 16.
CAUTION
NEVER leave water or water–base paint in the
sprayer if there is the slightest change it could
freeze. Flush out the water or water–base paint with
mineral spirits. If water freezes in the pressure con-
trol tube, it prevents the sprayer from being started,
and causes serious damage to the pressure
control.
1. New Sprayer. The 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, only.
2. Changing Colors. Flush with a compatible solvent
such as mineral spirits or water.

WHEN TO FLUSH

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
mineral 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 min-
eral 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.
NOTE: HOW TO FLUSH is on page 14.