Graco GM3500 SPRAYER 231-078 Instructions And Parts List page 8

NOTE: Refer to Fig 9-1 as you start the sprayer.
Use this procedure each time you start the sprayer to
help ensure the sprayer is ready to operate and that you
start it safely.
NOTE: When starting a sprayer that IS NOT primed, re-
move the spray tip.
1. Check the gas tank. Open the fuel shutoff valve.
2.
Check the engine oil level.
NOTE: The engine stops automatically if it is low on oil. If
you try to start it again without adding more oil, a
red light on the rear of the engine'lights as you
pull the starter rope.
3.
If
a secondary hose and gun is not installed, be
4. Place the suction tube into the paint container.
5. Flip the pressure control switch to OFF.
6. Open the fuel shutoff lever by pushing it in the di-
7. Be sure the spark plug cable is firmly pushed
sure the cap is securely plugging the nipple.
!
rection of the arrow.
onto the'plug.
Never attempt to start the engine unless fluid pres-
sure is relieved and the pressure control ON/OFF
switch is OFF. Trying to stat? the engine under load
will damage the recoil system.
IcA
8. Set the pressure adjusting knob
all the way coun-
terclockwise to the lowest pressure setting.
9. Pull the throttle lever away from the fuel tank
to
maximum position (fully left).
10. If the engine is cold, completely close the gray en-
gine choke lever, located beneath the air cleaner.
If the engine is warm, you may need to close the
choke only half way or not at all.
11. Turn the engine switch to ON.
12. Grasp the starter rope. Holding the frame with one
hand, pull the rope rapidly and firmly. Continue hold-
ing the rope as you let it return.
P u l l
and return the
rope until the engine starts.
WARNING
Letting the rope return too fast may cause serious
bodily injury if the rope hits someone. It could also
jam the rope in the recoil assembly.
~
13. Open the choke. In cold weather you may have to
opening it to keep the engine running. Otherwise,
leave the choke closed for
10
to 30 seconds before
open the choke as soon as the engine starts.
14.
Disengage the gun safety latch.
15. To start the pump, open the filter's pressure drain
valve. Turn the pressure control switch to
O N
and
slowly increase the pressure setting until the pump
starts to cycle slowly. Cycle the pump slowly until
fluid is flowing smoothly from the pressure drain
valve, indicating that the pump is fully primed. Close
the pressure drain valve. Holding a metal part of the
gun firmly against and aimed into a grounded metal
container, squeeze the trigger until fluid is flowing
smoothly from the gun. Release the trigger and en-
gage the gun safety latch.
16.
Install the spray tip in the gun. See the separate tip
manual,
307-848.
I'
To reduce the risk of serious bodily injury from from
the tip guard removed.
fluid injection,
NEVER
operate the spray gun with
17. Adjust the engine speed and pump pressure.
First set the throttle lever to the maximum
RPM
set-
ting (fully left). Trigger the gun onto a test paper to
check the spray pattern and atomization. Adjust the
pressure adjusting knob until you get a good pattern.
Then slowly lower the throttle setting as far as you
can without changing the spray pattern.
CAUTION
Always use the lowest possible pressure and throttle
setting to increase the life of the sprayer. Higher set-
tings cause excessive clutch cycling as well as tip
and pump wear.
Close the fuel valve whenever you are transporting
CAUTION
the sprayer to prevent fuel from flooding the
engine.
Keep the sprayer upright and level when operating
case oil from leaking into the combustion chamber
it and when transporting it. This prevents crank-
which makes startuD verv difficult.
8
307-893