Graco Uni-Drum Instructions Manual page 32

Operation
Load Material
When opening a new drum, take care to remove the
cover by holding it level. Tipping the cover may allow
accumulated dirt to spill into the material, which can
damage the equipment. Also check that the drum is
not damaged or dented.
8. Remove the cover from the new drum and remove
any other packing from the drum, exposing the
material. Make sure there are no foreign objects on
the surface of the material.
9. Position the new drum, using a suitable lifting
device, under the raised Follower Plate (D). Check
that the RAM READY Light is lit.
10. It is extremely important to lubricate the Follower
Plate wiper with a lubricant that is compatible with
the material to be pumped. Check with your material
supplier for compatibility.
11. If used, push the two front and rear Drum Clamps
(K) forward until engaged.
To reduce the risk of serious bodily injury, such as
splashing fluid in the eyes or on the skin, always wear
eye protection and protective clothing when operating
this equipment.
The pressure relieved by removing the bleed sticks
may cause the Follower Plate (D) to lower
unexpectedly. To prevent personal injury from moving
parts, such as pinching or amputating hands or
fingers, keep hands and fingers away from the
Follower Plate (D) when removing the bleed sticks.
12. Remove the bleed sticks from the Follower Plate
(D).
Before lowering the Follower Plate (D) into the drum,
make sure that nothing is between the Follower Plate
and the drum, or between the ram tie bar and the top.
13. Lower the Follower Plate (D) as follows:
32
NOTICE
a. Set the RAM POSITION Switch (AG) to
LOWER.
b. Lower the Follower Plate (D) until the material is
evident in the Bleed Ports (Q).
c. Set the RAM POSITION Switch (AG) to
HOLD/NEUTRAL
d. Replace the bleedsticks.
e. Set the RAM POSITION Switch (AG) to
LOWER.
14. Close both Pump No. 1 and Pump No. 2 inlet valves
(located on top of the air motor).
15. To prime the Pump, press the PRIME PUMP
Pushbutton.
16. Set the Pump air pressure to 30 psi.
17. Check that the AIR PRESS. ON indicator is lit.
18. Use a catch device to bleed the Pump. Slowly open
Pump No. 1 bleed valve. Back off the adjustment
screw several turns; do not remove the screw.
19. Slowly open the bleed-type air valve to the air
motor. Allow the Pump to cycle slowly until all air
escapes and material flows free of air from the
bleed valve.
F . 14
IG
20. Close the bleed-type air valve and Pump bleed
valve.
21. Repeat these steps for Pump No. 2.
Bleed-Type
Air Valve
309028ZAT