Graco Inc. Is Registered To I.s. En Iso - Graco GMax
3900 Instruction Manual

RAC TIP GUARD ASSEMBLY
WARNING
To reduce the risk of fluid splashback into the eyes or on
the skin:
USE THE BLACK RUBBER GASKET ONLY with latex
and oil-based paints, stoddard solvents, mineral spirits,
turpentine and water. NEVER use it with any other
solvents.
USE THE YELLOW PLASTIC GASKET with the same
solvents as the black rubber gasket and with lacquer
thinner, trichloroethylene, MEK, acetone, brush cleaner,
xylol and any unknown solvents.
A black and a yellow gasket are supplied with each
SwitchTip. The solvent you use determines which gasket to
use with the PS RAC. The new flat-backed seat accepts
either gasket. See Fig 26.
When to Use the Black Rubber Gasket
The black rubber gasket is for use ONLY with latex and
oil-based paints, stoddard solvents, mineral spirits, turpentine
and water. When using this gasket, the SwitchTip can be
removed and replaced without using tools.
When to Use the Yellow Plastic Gasket
The yellow plastic gasket can be used with the same fluids as
the rubber gasket AND most solvents. When using this
gasket, you must loosen the PS RAC retaining nut to remove
the SwitchTip.
INSTALLATION
WARNING
Install a SwitchTip spray tip in the tip guard. The flange on the
cylinder fits into the slots at the base of the tip guard.
Place the seat on the end of a pencil, curved side out. Guide
the seat into the retaining nut and turn until it straddles the
cylinder. See Fig 2. Drop in the appropriate gasket and press
it down. If using the yellow gasket, be sure the flat side faces
out. See Fig 1.
Screw the PS RAC snugly onto the gun, holding the tip guard
in the desired position while tightening the nut.
CAUTION
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
Fig.
OPERATION
Keep clear of nozzle! High pressure fluid from leaks or
spray can penetrate the skin and cause extremely
serious bodily injury, including the need for amputation.
The tip guard provides extra protection against injection,
but does not prevent it! NEVER cut off the tip guard!
The openings in the tip guard are designed to reduce paint
buildup on the guard while sparaying. Any damage to the
sharp edges of the tip guard openings causes paint to
collect at that area, To reduce the risk of damage, do not
hang the gun by the tip guard.
Be sure the SwitchTip handle is in the FULL SPRAY position
before operating the gun.
If the spray tip clogs while spraying, engage the gun safety
latch. Turn the arrow handle to the FULL CLEAN position.
Disengage the safety latch and trigger the gun into a
grounded metal pail. Fluid pressure should force out the clog.
Engage the safety latch and return the arrow handle to the
full spray position. If it is still clogged , follow the Pressure
Relief Procedure Warning on the front of this form and
remove the SwitchTip for cleaning.
MAINTENANCE
Change the seat and gasket whenever a SwitchTip wears
out. These parts wear at about the same rate.
Fig.
26
COPYRIGHT 1996, GRACO INC.

Graco Inc. is registered to I.S. EN ISO 9001

WARNING
CAUTION