I've always wondered why that clutch was there in the first place. Kubota calls it a "traveling clutch" to distinguish it from the separate PTO clutch. It strikes me that such a tradtional driveline or traveling clutch isn't much use when a machine has such low gearing that it will spin all tires at an idle rather than stall. And HST doesn't need a clutch since the central pedal position serves that function. In fact, the whole HST system is a sort of variable fluid clutch.
Possibly the traveling clutch was envisioned as a safety feature of some kind? In 8 years I wouldn't have used the clutch on mine a single time were it not for its being part of the starter safety switch circuit. Having it there has kept me from doing the stupid thing of starting the tractor to warm it up while standing beside it out of pure laziness. So I thank Kubota for that. Though for all the other use it's gotten, my M59 clutch assembly could have been replaced with a switch in the seat.
Dang, I've run on about the clutch and just now getting to what I wanted to ask, which is:
Is there anything on the left side of the steering column where the clutch pedal used to be? Did Kubota move the brakes and HST control over more to the center?
good luck with your machine,
rScotty