Arrived at location on 6/7/21 - Checked over unit, found motor operating. Found bushing worn and causing undue tension on shaft causing gear to free spin will order parts and return. Returned on 6/11/21 - replaced parts listed above. found shaft worn through and causing it to still slip. will need new rear shaft. will order and return. Returned on 7/7/21 - Replaced shaft, turned on let heat and verified conveyor ran smoothly with no issues. Unit is operating correctly at this time.