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Operation
Packing Nut
Keep the packing nut/wet-cup (2) filled with Graco
™
Throat Seal Liquid (TSL
help prolong the packing life. Adjust the packing nut
weekly so it is just tight enough to prevent leakage; do
not overtighten. Always follow the Pressure Relief
Procedure, page 9, before adjusting the packing nut.
2
Start and Adjust the Pump
Moving parts can pinch or amputate your fingers or
other body parts. When air is supplied to the motor,
the air motor piston (located behind the air motor
plates) moves. Never operate the pump with the air
motor plates removes.
1. See the Typical Installation on page 6. Be sure the
air regulator (E) and bleed--type master air valve (D)
are closed.
10
) or compatible solvent, to
Air
Motor
Plate
0195
2. Connect a suction hose (N) to the pump fluid inlet.
3. Hold a metal part of the spray gun (M) firmly to the
side of a grounded metal pail and hold the trigger
open.
4. Open the pump bleed-type master air valve (D).
5. Slowly open the air regulator until the pump starts,
at about 40 psi (0.9 MPa, 2.8 bar).
6. Cycle the pump slowly until all the air is pushed out
and the pump and hoses are fully primed.
7. Release the spray gun trigger and engage the
trigger lock. The pump should stall against pressure
when the trigger is released.
8. Perform the Pressure Relief Procedure, page 9.
9. Install the spray tip in the gun.
10. With the pump and lines primed, and with adequate
air pressure and volume supplied, the pump will
start and stop as you open and close the gun. In a
circulating system, the pump will speed up or slow
down on demand, until the air supply is shut off.
NOTICE
Do not allow the pump to run dry. It will quickly
accelerate to a high speed, causing damage. If your
pump is running too fast, stop it immediately and
check the fluid supply.
NOTE: If the container is empty and air has been
pumped into the lines, refill the container and prime
the pump and the lines, or flush and leave it filled
with a compatible solvent. Eliminate all air from the
fluid system.
11. Use an adequately sized air regulator (E) to control
the pump speed and the fluid pressure.
NOTICE
Always use the lowest air pressure necessary to get
the desired results. Higher pressures cause
premature tip and pump wear.
308116V
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