Here's step by step instructions for you on how to replace the belt on your Dirt Devil M088520 Featherlite.
Flip cleaner to expose nozzle base. Base should lay flat and face up. To remove nozzle guard, use Phillips
screwdriver to remove the two screws. Arrows (Diagram 1) show location of screws.
Lift nozzle guard off. Slide belt off motor shaft
Lift and remove brushroll (Diagram 3). Dispose of old belt.
TO REPLACE BELT
1. Place belt on motor shaft, then slip brushroll through belt. Place belt in area of brushroll without bristles (Diagram 4).
2. With belt in place, pull and slide brushroll into nozzle (Diagram 3) making sure that the brushroll end caps are in the correct
orientation (Diagram 3a inset)
IMPORTANT: Rotate brushroll manually to make sure belt is not twisted.
3. Reattach nozzle guard. Secure by locating the 3 tabs in the base slots and replace the screws (Diagram 1).
I really hope that this was helpful to you. If you'd like to download the manual for your vacuum cleaner where I got this information, please see the link below where you may download. If you found this helpful, please be so kind and rate my repair helpful, or leave feedback for me. This is really appreciated by Fixya users.
Thanks so much.Dirt Devil M088520 Featherlite Vacuum Cleaner Owners Manual