13
BELT TENSION
CAUTION
Excessive tension on the belt may lead to premature failure of belt and drive components.
Excessive tension on the belt may also lead to a safety hazard to the operator or bystanders.
The belt tension should be checked after the first 20 hours of use. And then every 40 hours of
use.
1. Check belt tension by applying approximately 22 pounds of pressure halfway between the
pulleys. The belt should defect approximately 3/8”.
Figure 3-1: Belt tension
2. Remove pulley cover and loosen gearbox mounting bracket bolts as well as tension plate
locknuts.
3. Turn bolt until desired tension is achieved. Tighten tension nut and then retighten tension
plate bolts, lastly retighten gearbox mounting bolts. When the belt has the correct
tension, the gearbox should be adjusted so that the gearbox extension is running straight
(parallel) with the flail mower.
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