The Drum Change Process
Release
drum clamps.
Turn elevator control valve to the up position.
Let the elevator raise all the way to the top.
Use caution as you raise the elevator so you don’t pinch
the compressed air or grease supply hoses. 
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Press the
drum ejector button. Doing so will force air between the ram
plate and empty drum bottom.
Release drum ejector button as you get close to the top. Doing
so will let the compressed air energy dissipate.
Guide the drum to keep it straight.. |
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Place the
new drum near the ram/pump
Clean the top of the ram plate as small parts or other foreign
material may have collected.
Also clean the top of the drum cover.
Note that the ram plate bleeder probe is in place.
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Remove
the ram plate bleeder probe. The ram plate bleeder port will
allow the bleeding of air between the ram plate and the grease.
Using the probe, clean out the grease that blocks the ram plate
bleeder port.
This can be done from the underside of the ram plate.
If you can see a clear passage to the ground it is clear enough.
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Concave
the grease by taking a piece of cardboard and transferring the
grease from the center of the drum and up the side of the drum.
You want the center to look lower.
We do this so the air is pushed to the center and out the ram
plate bleeder port as the ram plate is pushed into the drum.
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Next center
the new drum into position under the ram plate.
Move the ram/pump elevator control valve to the down position.
It is very important that the ram plate air bleeder port is
open so that the air between the grease and the ram plate can
escape.
Adjust the air pressure to the elevator if more down force is
required.
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Next you
will see grease being pushed out the ram plate air bleeder port.
If you don’t see grease coming out you may need to raise
the air pressure to generate more down force.
Install the ram plate bleeder probe. If you have difficulty
getting the probe installed you can put the elevator control
valve in the center and this will reduce the pressure
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Next open
the pump tube bleeder valve. This is used to bleed air that
is trapped inside the pump tube.
It is very important to get all the air out of the pump tube.
To tell if the air is completely gone watch the pump tube movement
as it cycles. A smooth pump change over action indicates that
no air is being compressed.
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It
is very
important to get the air bleed out at this point to assure that
airless grease is transferred to the dispensers.
Slowly turn the air motor venting ball valve on to cycle the
pump.
Holding a piece of cardboard capture the grease that contains
air. A sputtering or popping noise will be heard as the air
is expelled. When airless grease of present close the pump tube
bleeder.
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