Remove the discharge cone and its actuator mechanism. (Be careful not to pinch a finger
when removing the lever arm mechanism.)
Remove the resistor bar.
Loosen the bolts holding the clamshell closed. (It is not necessary to remove them.)
Remove the bolts holding the cake spout assembly to the C-plate and remove the spout.
Pry and slide out the screen assembly.
In the case of a perforated screen, pry the screen sleeve from its assembly. To do this, it
is likely that wedges will have to be used to hold open the clamshell.
KP presses with the “L” designation (i.e. KP-10L) will have a screen assembly that is split
into two halves that can be removed from the sides of the press. These halves are bolted to a
top and bottom resistor bar mounted to the B- and C-plates rather than the screen itself. No
other disassembly of press components is required.
When tightening a new perforated screen sleeve into a clamshell fixture, be sure not to
tighten to the point where the sleeve starts to buckle or bend inward. You want it tight as
possible, but not tight enough to deform the screen. When changing to different gauge
thickness of screens, shims may have to be added or removed from the clamshell joint.
Replacement thin gauge screens are provided with 1/4" extra length. This allows 1/8" at
either end to be peened over. The resulting 1/8" flange both helps hold the screen in place
and prevents the screen from being snagged by the screw.
In the case of split screens, the replacement perforated screen first must be clamped tightly
against the supporting frame. This can be done by forcing the new screen against the frame,
using C-clamps and wood or steel pieces. Be sure that extra screen material sticks out
beyond the edges of the frame, to allow trimming with a hand grinder.
Excessive rubbing between a screw and the screen can be corrected by grinding the
interference off the edge of the screw. Prussian Blue, applied to either the screw or the
screen, can be useful.
Screw Removal and Replacement
The screw is removed through the hole in the C-plate, at the cake discharge end of the press.
The operation can be difficult the first time, so we recommend consulting with the factory
before getting started.
First, remove the four bolts holding the shaft seal housing to the A-plate. This will prevent
damage when the screw drops out of the gearbox.
Next, remove the screen of the press, following the instructions in the “Screen Removal and
Replacement” section.
6" through 16" Series KP screw presses use a key and keyway to couple the screw inside the
hollow bore of the gearbox. It may be that a great deal of force will be required to push the
screw from the gearbox.
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