Graco UniDrum C59784 Instructions And Parts List page 22

Operation
Adjusting the Pump Regulators
NOTE: Both Pumps must operate at the same cycles
per minute rate to prevent the occurrence of uneven
drum evacuation.
NOTE: For the maximum air input pressure for each
Pump, see the appropriate manual shown in Related
Manuals on page 3.
13. Run the system under normal conditions. Adjust
the PUMP NO. 1 REGULATOR Control Knob (AE)
to the desired setting as follows:
a. Turn the knob clockwise to increase air
pressure or counterclockwise to decrease air
pressure. See F
b. Check the air gauge to verify the air pressure
setting.
14. Repeat step 29 to adjust the air regulator for the
PUMP NO. 2 REGULATOR Control Knob (AE).
Adjusting the RAM UP and RAM DOWN Air
Regulators
15. At the Pneumatic Logic Panel (G) (see F
page 10), open the hinged cover.
16. Set the RAM POSITION Switch (AJ) to RAISE and
push the RAM UP Pushbutton (AH). Verify that the
Follower Plate (D) raises at the desired speed. If
not, perform the following steps:
a. Adjust the RAM UP Air Regulator (AN). Turn the
knob clockwise to increase the amount of air
pressure. Check the air gauge to verify that air
pressure was increased. See F
pressure factory setting is 50 psi, and it is not
recommended to exceed 80 psi.
b. Verify that the R3 Regulator (AR) is set to 5 to
10 psi (0.035 to 0.07 MPa, 0.35 to 0.7 bar).
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Do not set the R3 Regulator higher than 5 to 10
psi (0.035 to 0.07 MPa, 0.35 to 0.7 bar). Setting
the R3 Regulator pressure higher than
recommended can cause the Follower Plate (D) to
drop and result in operator injury.
NOTICE
Failure to adjust the Regulator R3 properly can cause
the platen to exit the drum at a high rate of speed,
risking damage to the equipment.
c. Repeat step 16.a until the ram raises at the
desired speed.
17. Set the RAM POSITION Switch (AJ) to DOWN while
observing the air gauge inside the panel.
18. Adjust the RAM DOWN Air Regulator (AP) to 50 psi
(0.34 MPa, 3.4 bar) as follows (see F
a. Turn the knob clockwise to increase air
pressure or counterclockwise to decrease air
pressure.
b. Check the air gauge to verify the air pressure
setting. The air pressure factory setting is 50
psi, and it is not recommended to exceed 80
psi.
19. Close and secure the hinged cover.
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309169ZAF