![background image](http://html1.mh-extra.com/html/graco/l20c/l20c_operation_2251122020.webp)
Supply System Operation
20
6.
Remove bleed stick from platen bleed port (J).
7.
If drum has a plastic liner, pull it over edge of drum.
Secure liner with tape wrapped around circumfer-
ence of drum.
8.
Set the director valve (BC) to DOWN and lower the
ram until fluid appears at the top of the platen bleed
port (J). Adjust ram air regulator (BB) as needed.
Set the director valve (BC) to neutral and close the
platen bleed port (J). 2-Button Interlock: If system
has this feature, press and hold both buttons to start
lowering the ram. See F
IG
. 3, page 12.
L20c 2 in. Elevator, S20 3 in. Single Post,
and D60 3 in. Single Post
1.
Raise ram:
a.
For S20 and D60: Open the main air slider
valve (BA) and set the ram air regulator (BB) to
40 psi (0.28 MPa, 2.8 bar). Set director valve
handle (BC) to UP and let the ram rise to its full
height. 2-Button Interlock: If the system has
this feature, ram will stop as it nears the top.
Press and hold both buttons to raise ram com-
pletely. See F
IG
. 3 on page 12.
b.
For L20c: Set elevator director valve (DD) to
UP and let the ram rise to its full height.
2.
Lubricate the platen seals (D) with grease or other
lubricant compatible with the fluid you will pump.
3.
Put a full drum on the ram base and center it under
the platen (D).
4.
Remove the drum cover and smooth the surface of
the fluid with a straightedge. To prevent air from
being trapped under the platen, scoop fluid from the
center of the pail to the sides, to make the surface
concave.
5.
Adjust the pail to be sure it is aligned with the
platen, and remove the bleed stick to open the
platen bleed port (J).
6.
With hands away from the pail and the platen, push
down on the director valve (BC) handle, and lower
the ram until the platen rests on the lip of the pail.
For S20 and D60 only: Move the director valve
handle to the horizontal position (neutral).
7.
Lower ram:
a.
For S20 and D60: Set the director valve (BC) to
DOWN and continue to lower the ram until fluid
appears at the platen bleed port (J) and close
the platen bleed port. Set the director valve to
neutral, reinstall the vent handle, and tighten
securely.
b.
For L20c: Turn elevator director valve (DD) to
DOWN and continue to lower the ram until fluid
appears at the platen bleed port (J). Close the
platen bleed port (J).
F
IG
. 13
J
D
ti10543a
J
D
r_255648_313527_7a