FISCHBEIN PBC-6000, Operator'S Manual

Page: 36 / 82

FISCHBEIN
®
Co. MODEL PBC-6000™
OPERATOR’S MANUAL
REV. D 2005-03 36
9. You may wish to test a few bags with the heaters “OFF”. Then test the compression roller
settings with the heater “ON”. Be sure to allow the manifold to heat up completely before
testing begins. Follow the guidelines mentioned in the Quality Control section of this manual
to determine a good seal.
If the carry through belts are not holding the bag top well enough, but the compression is at the
desired pressure, adjust the front carry through belt guide just enough to achieve the needed hold.
CHANGING THE COMPRESSION BELTS
After normal use the compression belts will show wear at the compression surface and on the inner
teeth. Belts with significant gouges will not provide the needed complete pressure across the
adhesive area. When it is determined that the belts need to be replaced, always replace both belts.
If the belt needs to be replaced, follow these instructions:
1. Turn “OFF” and lock out the electrical and pneumatic supplies to the PBC.
2. Remove the front (swing channel) and rear (fixed channel) shrouds. Remove debris and dirt
from the shrouds.
3. Remove the top cover shrouding that is above the compression assembly area. (near the
drive motor)
4. Loosen the ½ inch screw of the swing channel compression roller from the bottom of the
machine enough to allow the block to be moved. Turn the compression block adjustment
screw (
A
) clockwise, to begin releasing the tension in the swing channel compression belt.
(
Illustrations 8.11
)
Loosen the ½ inch screw of the fixed channel compression roller from the bottom of the
machine enough to allow the block to be moved. The rear (fixed channel) compression roller
is moved by unlocking the jam nut and turning the (rear compression block) adjustment
screw (
C
) into the block. This action will begin to release the tension in the rear compression
belt. (
Illustrations 8.8 and 8.9
)
5. There are four (4) holding screws (
H
) that hold each of the takeup blocks to the channels.
They pass through slots and are on the underside of the channels just above the takeup
rollers. (
Illustration 8.8 and 8.11
) Loosen the screws (
H
) just enough to allow the block to
move. Loosening these screws too much will permit the shaft to tilt (skew) too much,
making it difficult to align the new belt.
6. Inside each channel the takeup roller blocks are positioned using a hex-head bolt (
T
).
(
Illustrations 8.8 and 8.11
) Turn this takeup bolt (
T
) so that it rotates into the block,
allowing the block to move towards the drive sprocket and compression roller. Keep doing
this until the old compression belt can be removed.
7. Place the new compression belts (part no. 17423) around the assemblies. Be sure to use
genuine
Fischbein parts.
8. Turn the takeup bolt (
T
) so that it rotates out of the block. This should begin to tighten the
compression belt. The holding screws (
H
) should be loose enough to allow the block to move
without permitting the shaft to tilt too much.
WARNING
If the pressure between the belts is too high, the carry through
belts (and channels) may begin to separate. Check the test bags
to ensure that the carry through belts are holding the bags firmly
.