Leon wrote:
"Robatoy" wrote in message
....

III. Was there a manufacturer's stipulation for motor RPM and how did
you account for it?


Those are good questions. What is the RPM of that Diesel?


Typically very low, below 2000 rpm.

Don't know what OP did, of course, and don't know the specific engine
precisely, but most small industrial diesels are torque-rated at roughly
2200-2400 rpm. The little Japanese 3-cylinders JD uses in their small
utility tractors are right in the middle at 2300 rpm for 540/1000 rpm PTO.

So, assuming this is in the same general range, it wouldn't take a
terribly big step in pulley sizes to get roughly the right cutterhead
speed; 20% or so on each from originals would certainly be good enough.

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