Graco GM3500 SPRAYER 231-078 Instructions And Parts List page 13

I
WARNING
To reduce the risk of serious bodily injury, including fluid
5.
Engage the gun safety latch.
Pressure Relief Procedure
from moving always follow this when-
6. Open the fluid pressure drain valve and leave
it
injection, splashing in the eyes or on the skin, or injury
you shut off the sprayer, checking, adjust or clean the open until you start the sprayer again.
system, or change spray tips.
7.
Disconnect the spark plug cable.
1. Engage the gun safety latch.
lfyou
suspect that the hose or tip is completely clogged
2. Turn the engine ON/OFF switch to OFF. or that pressure is not fully relieved affer following the
3. Flip the pressure control switch to OFF.
stepsabove, VERY SLOWLY loosen a hose end fitting
or the tip guard retaining nut and relieve pressure
4. Disengage the gun safety latch. Holding a metal part
gradually. Now clear the tip or hose.
trigger the gun.
of the gun firmly to the side of agrounded metal pail,
Check everything in the guide before disassembling the sprayer.
JROBLEM
fnginekprayer won't start
3ngine won't pull over.
?as engine operates but
jisplacement pump doesn't
)perate
CAUSE
I
SOLUTION
Engine switch not
ON
I
Turn on.
Engine oil level low
Try starting engine. If light on rear of
engine glows, replenish oil..
Spark plug cable disconnected or Connect cable on top of engine or re-
spark plug bad place spark plug.
Out of gas
Water frozen in pressure control.
Replenish
Graco dealer for rep-:?
Return pressure control to authorized
Oil seepage into combustion
Remove spark plug. Pull engine over
chamber.
3 or
4
times. Clean and replace plug.
Try to start. Keep sprayer upright to
avoid seepage.
- ,
Pressure control switch turned OFF
Clean filter.
Displacement pump outlet filter dirty
Increase pressure.
Pressure setting too low
Turn on.
or clogged
Tip or tip filter clogged Clean tip or tip filter.
Displacement pump rod seized by dry
Service pump. See 307-806.
paint
I
Connecting rod worn or damaged
Check wiring connections. See page Electrical power not energizing
field
Replace. See page 20.
Driie housing worn or damaged
Replace. See page
18.
15.
With pressure control switch ON and
test light to check continuity across
pressure turned to MAXIMUM, use a
black and wire wires from pressure
control.
Have pressure control checked by
authorized Graco dealer.
Clutch worn or damaged
Service. See page
21.
Pinion assembly worn
or
damaged
Service. See page 24.
'
Continued on page
14
307-893 13