Installation and Maintenance Manual: RLVAC
Published February 2022
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Figure 14: Pneumatic Takeup Drive Overview
5.5.2 Belt Routing: Pneumatic Takeup Drive
1. Remove the takeup guards on both sides of the drive. Remove the access panels on the drive
side opposite the gearmotor. See Figure 14: Pneumatic Takeup Drive Overview.
2. Pull the takeup pulley as close to the drive pulley as it will go. This will result in the tensioning
cylinder extending fully. See Figure 30: General Arrangement, Belt Under Roller AC, Pneumatic
Takeup Drive, Sheet 1 of 1 in Appendix 2: General Arrangement Drawings for exploded views
and details.
a. If the takeup pulley does not slide freely, temporarily unhook the air hose between the air
regulator and the tensioning cylinder to break the vacuum in the tensioning cylinder.
Ensure that no dirt or foreign material gets into the air system, and reinstall the air hose
as soon as the takeup pulley has been moved.
3. Check both chains on the takeup pulley to ensure they are laying flat and are both the same
distance from the end sprockets. If one of the chains has skipped a tooth, the takeup pulley will
pull to one side and the belt will be impossible to track.
4. Check both chain anchors where they attach to the tensioning cylinder yoke. Both chains should
be the same distance from the yoke, which will ensure the takeup pulley stays square.