We've just changed our 4012D over to metric bearings.
One new jackshaft and one re-machined.
Bigger better bearings, less expensive than US imperial, sealed and greasable, not the purge type.
480 hours on the clock before the belt shredded due to worn bearings which is normal.
Bearings though, silky smooth, just worn.
The toothed belt is a shocking price though eh?
I did read of one guy who has changed over to using 2 motorcycle chains instead.
I've spoken to others who have used the hydro head and they all had serious issues and have gone back to belt driven machines.
I have a suspicion that I may a bit unique over here in bothering (almost obsessively) to sharpen the grinder teeth.
Whilst our 4012 was down having it's work done we subbed out to a local competitor with a tracked 5014 44hp.
Aside from being better able to work on poor terrain than our 4012 wheeled, I observed that the actual grinding was no faster than ours.
Later, Seb got a look at the teeth and was amazed to see them almost totally rounded off.
This company had previously been running a Bandit with a hydro head and had no end of issues with it.
I'm not saying that blunt teeth are the cause but a company that ignorant about maintenance of teeth probably can't see other problems as the arise.
I can see that a hire compnay might like hydro machines because of their low maintenance but there again, they shift machines on to the likes of us after a couple of years...
So your likely to get some-one elses dirty laundry to wash by buying a high hours used hydro machine.
Having said that, when I replaced a hydro motor for a chipper, I was a bit shocked by the cost of an original spare.
Later, I googled around and found that for 3-4 times less I could have bought one online.
Ah well, next time.
Ty