Weak wheel power on one side

[phil.winter]

Hi all. I have had a look through all the threads and couldn't find an answer to this.
I have a Ferris is1550z. The LH wheel power is less than the RH side both forward and reverse. Up hill is quite slow.

The pump arm/linkage movement is the same for both pumps. Forward speed is slower than I'd expect as I have to hold the left lever in the most forward position but the RH lever needs to be just half that of the LH side. As I say, both of the hydro controls do move the same amount.

The engine and grass cutting operation is fine.

I just brought the machine so do not know how long it has been like this.
Any ideas.? thanks.

 

[mechanic mark]

http://www.lawnmowerforum.com/ferris-forum/ Have you tried this site? If this does not help, post year, model & serial numbers, as well as all numbers from engine, information is needed, thanks.

 

[gregjo1948]

Perhaps the hydraulic disengagement is partially applied on that side. gregjo1948