Installation and Maintenance Manual: RLVAC
Published February 2022
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4. Evenly lift up the entire pressure module, including the module guide plates, until the guide pins
clear the bushings and the module can be slid out from underneath the belt. Set the pressure
module aside, noting its flow direction for later.
5. Pry off the retaining ring (7) holding the bushing (6) in place. Discard the old bushings and
retaining rings. See Detail A of Figure 28: General Arrangement, RLVAC Bed Section, Sheet 2 of
2 in Appendix 2: General Arrangement Drawings.
6. Put a new bushing in place and press on a new retaining ring (7) until the bushing no longer
moves vertically. The fingers of the retaining ring should face downward.
7. Reinstall the pressure module in the same orientation it was removed. It should not be necessary
to loosen or reposition the module guide plates if the orientation is kept the same.
8. Ensure the module guide plates move freely in the guide bushings (6).
9. Reinstall any removed pressure module rollers, finger guards, and conveying rollers.
10. Follow the belt tensioning and tracking procedures in section 5.12.1 for screw takeup drives, or
section 5.12.2 for pneumatic takeup drives. Check belt tracking in the area of the removed
module. If the module was replaced in the same orientation, no adjustment should be necessary.
6.9 Skew Beds
6.9.1 Skew Roller and Band Replacement
Follow the same procedures as in section 6.7.4 and 6.7.5 for roller and band replacement.
6.9.2 Routing Roller Replacement
1. Relax belt tension on the conveying belt by loosening the takeup. See section 5.12.1 for screw
takeup drives or section 5.12.2 for pneumatic takeup drives.
2. Remove the straight banded rollers (22) at the beginning or end of the skew section, until the
routing roller (37) or (81) is accessible. See Figure 27: General Arrangement, RLVAC Bed
Section, Sheet 1 of 2 and Figure 28: General Arrangement, RLVAC Bed Section, Sheet 2 of 2 for
details.
3. One side of the roller hex will depress. Push the roller hex in until the roller can be tilted up and
slid out of the conveyor.
4. It may be necessary to loosen (but do not remove) the bolts holding the routing roller frame to its
bed spacers, to gain additional room to tilt the rollers.
5. Insert the replacement roller (37) or (81). Note that item (81) is a crowned roller, which can be
identified by the shiny machined surface. The crown is very slight and will generally not be visible
without a straightedge to compare against. Item (37) is a non-crowned roller with a mill finish
tube.
6. Check belt routing against Figure 16: Skewed Bed Belt Routing in section 5.5.3.
7. Tighten any bolts that were loosened in step 4.
8. Reinstall any rollers, bands and guards that were removed.
9. Follow the belt tensioning and tracking procedures in section 5.12.1 for screw takeup drives, or
section 5.12.2 for pneumatic takeup drives. Check belt tracking in the area of the replaced roller.
If the roller was replaced without modifying the tracking adjustment on the crowned roller (81),
minimal or no adjustment should be necessary.
6.10 Accessories
6.10.1 PTO
Reference the BSC manual for the driven conveyor (RLCAC or RLSAC) for details on PTO maintenance.
6.10.2 Tracking Zones
6.10.2.1 Tracking Roller Replacement
1. Relax belt tension on the conveying belt by loosening the takeup. See section 5.12.1 for screw
takeup drives or section 5.12.2 for pneumatic takeup drives.
