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 belt repeatedly comes off

The problem

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

Likely cause

The accepted diagnosis was that the drum pulley is probably running untrue. The discussion says this may be due to a loose drum pulley or worn drum bearings.

What fixed it

Check whether the drum pulley is loose and whether the drum has noticeable up-and-down play from the front behind the door. If the pulley moves significantly, worn bearings are indicated. The exact repair was not confirmed in the thread. Further diagnosis should be carried out by a suitably qualified appliance engineer.

Checks to try

• New belt fitted with no improvement
• Check for up-and-down movement of the drum from the front behind the door
• Observe whether the drum pulley moves significantly
• Noise would also be expected if the bearings are worn

Parts or tools mentioned

• Drive belt
• Drum pulley
• Drum bearings