EZR1648 noisy hydro drive. wont pull mower

[billkater]

I was mowing today when the right hand drive started to whine and not want to pull itself. If i would stop for 10 minute or so it would work fine for a bit then start it again.


Any suggestions on where to start? Are the drives serviceable or not?

Ariens EZR1648
model 915009

thanks

Bill