Machine keeps throwing the belt off

This thread was marked as solved. Here's a summary of the problem and the fix, generated from the discussion below.

Washing machine repeatedly throwing off drive belt

The problem

The washing machine repeatedly throws the drive belt off. Fitting a new belt did not cure the fault.

Likely cause

The accepted reply says the belt itself is likely not the issue if its condition is good. The most likely cause is the drum pulley running untrue, either because the pulley has worked loose or the drum bearings are worn.

What fixed it

Check whether the drum pulley is running out of true and whether there is excessive drum movement. If the drum can be lifted up and down noticeably from the front behind the door, this supports worn drum bearings. Exact repair was not confirmed in the discussion.

Checks to try

• New belt fitted with no improvement
• Check whether the drive belt condition is OK
• Check if the drum pulley is running untrue
• Lift the drum up and down from the front behind the door to see if there is excessive movement
• Listen for abnormal noise, which would be expected if the bearings are worn

Parts or tools mentioned

• Drive belt
• Drum pulley
• Drum bearings