Flushing - Graco 220-856 Instructions And Parts List

NOTE: Several flushes may be required to clean the system and prepare it for the next fluid or storage. Use this
chart to determine the required flushes and use the procedure below for flushing.
*Use this category for flushing a brand new sprayer and flushing after storage.
System has this y Next fluid to be
fluid in it: fluid in it: sprayed: sprayed:
*Oil-based solvent Oil-based paint –
or paint new color
Oil-based solvent or Water-based paint
paint
Oil-based solvent or Prepare for storage
paint
Water or water- Water–based
based paint paint – new color
Water or water- Oil-based paint
based paint
Water or water- Prepare for storage
based paint
WARNING
INJECTION HAZARD
To reduce the risk of serious bodily
injury, follow the Pressure Relief Proce-
dure Warning on page 11 before check-
ing or repairing any part of the spray system.
CAUTION
NEVER allow water or water–base material to freeze
in the pressure control. Doing so prevents the
sprayer from being started and causes serious
damage to the pressure control. Pump the water out
with mineral spirits.
WARNING
FIRE AND EXPLOSION HAZARD
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 grounded
metal pail.
1. Relieve pressure. Engage the trigger safety latch.
2. Remove the filter bowl (B) and screen (C). Rein-
stall the bowl and support (D) only. Clean the
screen separately.
3. Turn the pressure adjusting knob (A) fully counter-
clockwise to the minimum pressure.

Flushing

Flushing order
Flush 1 Flush 2
Mineral spirits none
Mineral spirits Warm soapy
water
Mineral spirits none
Warm soapy Clean water
water
Warm soapy Clean water
water
Warm soapy Clean water
water
4. Remove the spray tip from the gun.
5. Put the suction tube into a grounded metal pail
with 1/2 gallon of compatible solvent.
6. Start the sprayer. See page 7. To save the fluid in
the sprayer as you start to flush, trigger the gun
into another container until the next fluid appears,
then trigger the gun back into the fluid you are
pumping. Circulate the flushing fluid a couple of
minutes to thoroughly clean the system.
7. Raise the suction tube and 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 pressure.
8. Remove the suction tube and clean separately.
9. Install the filter screen. Hand tighten the bowl.
C
D
Fig. 6
Before you spray or store y
sprayer: sprayer:
Flush 3
none Prime with oil
Clean water Prime with water
none Relieve pressure
Leave drain valve open
none Prime with water
Mineral spirits Prime with oil
Mineral spirits Relieve pressure
Leave drain valve open
p y
A
B
44
01749A