Changing Empty Drums - Graco Uni-Drum Instructions Manual

b. Verify that the Follower Plate (D) lowers to the limit
set point: a level between 1 -4 in. (25.4
-101.6 mm) from the bottom of the drum.
c. Adjust the low limit switch to activate at the level
defined in step 37.b. See F
Limit Switches
Pin 1
Pin 3
Pin 5
Pin 2
Pin 4
F . 13
IG

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.
309028ZAT
. 13.
IG
1 to 4 in.
(25.4 to
101.6 mm)
TI0200
• 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 (K) are engaged on the Uni-Drum ram
base.
2. Check that the Pump air is turned off. On the
Junction Box Panel (H), the PUMP ACTIVE and
PUMP READY lights are not lit.
3. Check that the RAM UP Air Regulator (AJ) is set to
50 psi. It is not recommended to 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 (AG) to RAISE,
then wait 5 seconds.
NOTE: If RAM UP Pushbutton (AF) 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 (AF) as
the Follower Plate (D) slowly rises.
6. With the ram raised and the RAM POSITION Switch
(AG) set to RAISE, pull the Drum Clamps (K) (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.
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.
Operation
31