Startup - Graco GM 3500 Instructions-Parts List Manual

NOTE: Refer to Fig 11–1 as you start the sprayer.
NOTE: When starting a sprayer that IS NOT PRIMED,
remove the spray tip.
1. Be sure the gas tank is full. Open the black fuel
shutoff lever.
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 glows as you
pull the starter rope.
3. Place the suction tube into the paint container.
4. Turn the pressure control switch to OFF.
5. Open the black fuel shutoff lever by pushing it in
the direction of the arrow.
6. Be sure the spark plug cable is firmly pushed
onto the spark plug.
CAUTION
Never attempt to start the engine unless fluid pres-
sure is relieved and the pressure control is turned
OFF. Attempting to start the engine when it is pres-
surized will damage the recoil system.
7. To start the engine:
a. Turn the pressure adjusting knob all the way
counterclockwise to the lowest pressure setting.
b. Pull the metal throttle lever away from the fuel
tank to the maximum position (fully left).
c. If the engine is cold, close the gray choke lever,
located beneath the air cleaner.
If the engine is warm, close the choke only half
way or not at all.
d. Turn the engine switch to ON.
WARNING
A rope which recoils too quickly may hit someone
and cause serious bodily injury. The rope could
also jam in the recoil assembly.
e. Grasp the starter rope. Holding the frame of the
sprayer with one hand, pull the rope rapidly and
firmly. Continue holding the rope as you let it re-
turn. Pull and return the rope until the engine
starts.
f. Open the choke. In cold weather, leave the
choke closed for 10 to 30 seconds before open-
ing it to keep the engine running. Otherwise, open
the choke as soon as the engine starts.
START UP
8. Disengage the gun safety latch.
9. To start the pump:
a. Open the pressure drain valve.
b. Turn the pressure control switch to ON.
c. Slowly increase the pressure setting until the
pump starts to cycle slowly. Cycle the pump slow-
ly until fluid is flowing smoothly from the pressure
drain valve, indicating the pump is fully primed.
d. Close the pressure drain valve.
e. Hold a metal part of the gun firmly against a
grounded metal container, squeeze the trigger
until fluid is flowing smoothly from the gun.
f. Release the trigger and engage the gun safety
latch.
To reduce the risk of serious bodily injury from fluid
injection, NEVER operate the spray gun with the tip
guard removed.
10. Install the spray tip. Refer to the instruction manual
supplied with the tip (307–848 if you are using a
RAC IV).
11. Adjust the engine speed and pump pressure.
Trigger the gun onto a test paper to check the spray
pattern and atomization. Turn 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.
Always use the lowest needed fluid pressure and
the lowest needed throttle setting, to increase the
life of the sprayer. Higher settings cause excessive
clutch cycling, premature tip wear and premature
pump wear.
Close the fuel valve whenever you are transporting
the sprayer to prevent fuel from flooding the en-
gine.
Keep the sprayer upright and level when operating
it and when transporting it. This prevents crank-
case oil from leaking into the combustion chamber,
which makes start up very difficult.
WARNING
CAUTION
CAUTION