Flushing The System; Starting The Pump; Standard Operation Flushing; Checking The Ratio - Graco 965660 Instructions And User Manual

Flushing the System

1. Put the pump intake hoses into a 5 gallon (20 liter)
container of a compatible solvent. Refer to the fluid
manufacturer's recommendations.
2. Start the pump as instructed below.
3. Do not install a spray tip yet. Hold a metal part of the
gun firmly to the side of a grounded metal pail.
Using the lowest possible fluid pressure, trigger the
gun into the pail.
4. When clean solvent comes from the spray gun,
release the trigger and carefully check all connec-
tions in the system for leaks.
5. Take the hoses out of the solvent, and trigger the
gun until all the solvent has been pumped out of the
hoses.

Starting the Pump

1. Close the bleed-type master air valve, and turn the
air regulator knob all the way out (counterclock-
wise).
2. Turn on the main air supply.
3. With the mixer manifold handle in the open (down)
position (see Figure 4), trigger the gun, slowly open
the bleed-type master air valve, and turn the air reg-
ulator knob clockwise until the pump starts to cycle.
4. Allow the pump to cycle slowly until all the air is
pushed out of the lines. Release the trigger - the
pump will stall against the pressure.
5. The manifold handle controls fluid flow. With the
lever of the manifold in the open (down) position,
base and catalyst are supplied to the gun. To stop
the flow, move the handle to the closed (up) posi-
tion.
14

Standard Operation Flushing

Use the solvent valves to flush contaminants and mixed
fluids from the mixer manifold, hose and spray gun. Fol-
low the procedure, below.
1. Start the solvent pump, and move the mixer mani-
fold handle to the closed (up) position. See Figure
4.
2. Open one of the solvent valves and trigger the gun
into the metal pail until thoroughly flushed. Release
the trigger.
3. Close the opened solvent valve, and open the other
solvent valve. Trigger the gun into the pail until thor-
oughly flushed. Release the trigger.
4. Open both solvent valves and continue flushing until
all contaminants and fluids are removed. Release
the trigger.
5. To flush the sampling valves, place a grounded
metal pail under the sampling valves. Turn the valve
handle to the open position. Flush until all contami-
nants and fluids are removed. Close the sampling
and solvent valves. The solvent valves should be
finger tight only, but must be tight enough to prevent
solvent from mixing with the fluid during operation.
6. Trigger the gun to relieve the pressure.

Checking the Ratio

1. Open the mixer manifold by moving the handle to
the down position. See Figure 4.
2. Set your operating pressure. After determining the
operating pressure, release the spray gun trigger
and lock the safety latch.
3. Close the mixer manifold by moving the handle to
the up position. See Figure 4.
Operation
309239 Instructions - Parts List