most common cause is the failure, or wear of the rollers at the rear,
the drive belt places a lot of torque on the drum, and it has rollers to support this force, in addition to nylon guides as the front has
good roller
worn roller
most dryers access from the front, the front panel and door come off,
here are generic removal instructions
with dryer unplugged examine lower front panel.
If there are two screws at lower corners
- remove screws
- swing front panel up from bottom
- unhook top clips
- undo door switch wires
- set panel and door aside
If there are no screws
- remove llint screeen from top
- remove 2 screws from under lint screen
- with putty knife or other blunt blade
push spring clips at front top corners
- tilt top up
- remove 1 screw each side 1/3 way from top of dryer
- tilt front panel down
- undoor door switch wires
- set front panel aside
Common to both types
- reach under drum to belt tensioner, pull tensioner to end of spring travel
- unhook belt from motor and tensioner
- withdraw drum forward
- examine rollers felts nylon guides
replace rollers in pairs if worn
replace nylon glides if worn
replace felts if worn, the back one may wear before the front one,
if the dryer is the open drum type,
replacing resister
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