Graco S20 Operation page 23

3. Close the ram air regulator (BB) and the air motor
regulator (BE) by fully turning the regulator knobs
counterclockwise.
4. Open the main air slider valve (BA).
5. The air motor and ram pressure gauges should
read zero when the regulators (BB, BE) are closed
and the main air is on.
6. Set the ram air regulator (BB) to 40 psi (0.28 MPa,
2.8 bar).
7. Set the ram director valve handle (BC) to UP and let
the ram rise to its full height. 2-Button Interlock: If
the system has this feature, the ram will stop as it
nears the top. Press and hold both buttons to raise
the ram completely. See F
8. Inspect platen seals (D) for damage and lubricate
with grease or other lubricant compatible with the
fluid to be pumped. See F
9. Remove the drum cover and inspect the material
for contamination and ensure the top surface of the
material is level. Smooth the surface of the fluid
with a straightedge if necessary.
10. If the drum has a plastic liner, pull it over edge of
the drum. Secure the liner with tape wrapped
around the circumference of the drum.
11. Replace the drum cover before moving the drum to
prevent possible spillage.
12. Put a full drum of material on the ram base, slide it
back against the drum stops, and center it under
the platen (D). Drum styles vary, so the drum may
not be perfectly centered when positioned against
the drum stops. An optional drum roller kit is
available for D200 and D200s supply systems to
make it easier to load the drum on the base. Order
Kit 255627.
NOTE: Single post ram models beginning with the letter
S do not include drum stops and must be manually
centered under the platen.
13. Remove the drum cover.
14. Remove bleed stick from platen bleed port (J).
313526S
. 4 on page 14.
IG
. 17 and F . 18.
IG IG
J
D
F . 17: D200 and D200s 6.5 in. Dual Post
IG
J
D
F . 18: S20 and D60 3 in. Single Post
IG
A combination of compressed air and material from
the drum can spray from the bleed port at high
velocity when the platen is plunged into the material
drum. Wear appropriate protective equipment when
in the work area to help prevent serious injury from
splashing fluid.
NOTICE
To prevent damage to platen seals, do not use a
drum that is dented or damaged.
15. Set the ram director valve (BC) to DOWN and lower
the ram until the platen (D) is just above the top of
the drum, then set the ram director valve (BC) to
neutral.
Operation
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