Mower deck Husqvarna CTH 173 deck belt problem

[rrockettman]

Hi all.
Since I bought this ride on new 2 years ago, the deck belt drops off the pulley every time I stop the cutting blades.
The only way to get it back on is to stop the engine, and manually replace the belt on the front pulley.
A real pain in the a**!
Is there a tensioner? I've had the deck off several times to clean it and find a cure, but no joy.
Last time I used it I got so fed up, that I put a cable tie across the front pulley U shaped guide bracket. It has stopped it dropping off, but not a very good fix.
Any other suggestions?
Thanks in advance.
Russ.

 

[rrockettman]

I solved the problem by bolting a piece of flat metal strip to the chassis, bending it so that it is not touching the belt when it's running, but preventing it dropping lower than the pulley when released.
Only dropped off once since then as it needed a bit of fine tuning with the hammer!
Russ.

 

[mechanic mark]

Good post Russ, I'm sure there are others out there encountering same problem.