Flush The System; Start And Adjust The Ram - Graco A Series Instructions - Parts Manual

Operation

Flush the System

To avoid fire and explosion, always ground equipment
and waste container. To avoid static sparking and
injury from splashing, always flush at the lowest pos-
sible pressure.
NOTE: The pump is tested with lightweight oil, which is
left in to protect the pump parts. If the fluid you are using
might be contaminated by the oil, flush it out with a com-
patible solvent before using the pump.
Flush with a fluid that is compatible with the fluid you are
pumping and with the wetted parts in your system.
Check with your fluid manufacturer or supplier for rec-
ommended fluids and flushing frequency. Always flush
the pump before fluid dries on the displacement rod.
Never leave water or water-based fluid in a carbon
steel pump overnight. If you are pumping
water-based fluid, flush with water first, then with a
rust inhibitor, such as mineral spirits. Relieve pres-
sure, but leave rust inhibitor in the pump to protect
parts from corrosion.
1. Follow the Pressure Relief Procedure on page 9.
2. Remove the tip/nozzle from the dispensing device
you are using with the pump.
3. Hold a metal part of the dispensing device firmly to
the side of a grounded metal pail.
4. Start the pump. See Start and Adjust the Pump on
page 11. Always use the lowest possible fluid pres-
sure when flushing.
5. Trigger the dispensing device.
6. Flush the system until clear solvent flows from the
dispenser.
7. Relieve the pressure. See page 9.
10
NOTICE

Start and Adjust the Ram

To reduce the risk of serious injury and damage to
equipment, do not shut off the air supply to the ram
when the ram is raised. Doing so will cause the pump
to fall uncontrolled to the bottom. Also, as the ram is
raised and lowered, the wiper plate, ram tubes, and
pump mounting bracket move. To reduce the risk of
pinching or amputation of fingers, keep your hands
away from the wiper plate, lip of the fluid can, pump
bracket, ram tubes, and air motor coupling cavity while
the pump is operating.
NOTE: Reference numbers and letters in parentheses
in the text refer to the callouts in F
the parts drawings. Refer to those for operation.
1. Close all air regulators and bleed-type air valves.
2. Open the air valve in the main air line and set the
ram air regulator (27B) to 28 psi (200 kPa, 2 bar).
Set the ram director valve switch (36) to the up posi-
tion and let the ram rise to its full height. To change
the speed at which the ram raises and lowers,
adjust the air regulator to increase or decrease the
air volume.
3. Check that the fluid can is not dented or out of
shape, which will damage the wiper plate and cause
leakage around the wiper. Cut off the top of the fluid
can with the can opener, or remove the bottom of
the can. Be sure that the edge is free of burrs, which
will damage the wiper plate. If necessary, bend the
edge back with pliers so the wiper plate will enter
the can easily. Lubricate the wiper ring (305) to help
the plate enter the can easily.
4. Set a can of fluid on the ram base, centering it under
the wiper plate (P).
If the can has a welded seam, position it with the seam
facing the rear of the pump to avoid injury due to splat-
tering fluid if the can leaks at the seam.
. 1 on page 6 and
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308302U