Changing Empty Drums - Graco UniDrum C59784 Instructions And Parts List

Operation

Changing Empty Drums

NOTE: After the automatic Pump crossover has taken
place, immediately replace the empty drum with a new,
full drum. If both Uni-Drums become empty at the same
time:
• Material will stop being delivered to the dispenser.
• Air may enter the supply hose or pipe header.
• Pump runaway could occur, resulting in damage to
the Pumps.
Drum Changing Procedure
To remove an empty drum and load a new, full drum:
1. If used, verify that the two front and rear Drum
Clamps (L) are engaged on the UniDrum ram base.
2. Check that the Pump air is turned off.
3. Check that the RAM UP Air Regulator (AN) is set to
at least 60 psi. Do not exceed 80 psi.
4. Close the two ball valves at the outlet manifold at
the rear of the Uni-Drums.
5. To raise the Follower Plate (D):
a. Set the RAM POSITION Switch (AJ) to RAISE,
then wait 5 seconds.
NOTE: If RAM UP Pushbutton (AH) is pushed within 5
seconds, the vent valves may open before the pressure
under the Follower Plate (D) is relieved causing the
material to bleed past the vents.
b. Push and hold the RAM UP Pushbutton (AH) as
the Follower Plate (D) slowly rises.
6. With the ram raised and the RAM POSITION Switch
(AJ) set to RAISE, pull the Drum Clamps (L) (if used)
back and remove the empty drum, using a suitable
lifting device.
Use a long-handled flat-bladed ice scraper if it is
necessary to scrape the bottom of the Follower
Plate (D). To avoid serious injury, do not put your
hands between the plate and the drum.
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7. Being careful not to damage the Follower Plate (D)
wipers, wipe or scrape any material buildup from
the Follower Plate (D) and wipers, and properly
dispose of the waste material.
Load Material
NOTICE
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 DRUM IN POSITION Indicator (AM) 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
(L) forward until engaged.
12. Remove the Safety Pins (P).
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.
13. Remove the bleed sticks from the Follower Plate
(D).
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