b) Increase the distance between the motor and thebearing to increase the V-belt tension. Decreasethe distance to loosen the V-belt.c) Tighten the 4 nuts.6. Install the V-belt cover.To replace the V-beltWARNING: Only remove the V-beltcover when the product is disconnected fromthe mains outlet and the motor has fullystopped.WARNING: Do not operate the productwithout the V-belt cover installed.1. Stop the product. Refer toTo stop the product onpage 12.2. Remove the V-belt cover. Refer toTo do a check ofthe V-belt tension on page 18.3. Decrease the distance between the motor and thebearing to release the tension of the V-belt.4. Remove the V-belt and install the new V-belt.5. Increase the distance between the motor and thebearing to apply tension to the V-belt. Refer toTo doa check of the V-belt tension on page 18.6. Install the V-belt cover.Filter replacementWARNING: Use personal protectiveequipment. Refer toPersonal protectiveequipment on page 7. Dangerous dust canrelease into the air during filter replacement.WARNING: Stop the product anddisconnect the power supply before filterreplacement.To replace the primary filtersWARNING: Always use personalprotective equipment when you replace theprimary filters. Refer toPersonal protectiveequipment on page 7.There are 9 primary filters in the DC 975 and 6 primaryfilters in the DC 655. Replace all filters at the same time.1. Stop the product. Refer toTo stop the product onpage 12.2. Remove the 6 nuts and the cover of the filterhousing.3. Remove the 3 nuts.2061 - 001 - 13.02.2023 19