amdx wrote:

"Karl Townsend" wrote in message
...
The new ring gear for my tractor flywheel should arrive today...

I've never done this. Pretty sure you just heat it and drop on. OK,
how hot? I know there's only one shot, f%^k up, and go buy another
ring gear. I'm planning to go round and round with the rose bud and
need a guide line like hot enough to smoke oil, etc. I got no way to
measure the temp. Surely, it don't need to go to red hot.

Karl

When I was in high school the shop teacher put a ring gear on a flywheel.
He just put the flywheel in the freezer in the cafeteria and the ring in the
oven.
I don't know what temperature the oven was, but I recall the students were
impressed with how lose the ring was when he dropped it on the flywheel.
I seem to recall it was for an MG. YMMV
Mikek

The flywheel / ring gear is pretty large diameter, so you don't need a
whole lot of differential expansion to get good clearance. I would think
just a few hundred degrees temperature differential would be plenty.
When fitting much smaller spindle bearings of around 5" ID we wrapped
them in foil and put them in a toaster oven at 250 for a little while
with good results.