On Sat, 21 Feb 2009 11:56:25 -0500, Jeff Wisnia
wrote:

Kenneth wrote:

On Fri, 20 Feb 2009 18:32:45 -0800 (PST), Pat
wrote:


On Feb 20, 8:00 pm, Kenneth wrote:

Howdy,

I threw the chain on my 6' tractor mounted snow blower
(because the master link cracked...)

In order to replace and adjust the chain, I have to
disassemble part of the blower.

There is a universal joint that is keyed, and its yoke slips
onto the drive shaft. Or, more accurately, it slipped on
when everything was new, and clean.

Getting it off has proven to be pretty tough. Using various
wedging techniques, I managed to get it off for all but
about 1/2" of its length, but I have not had any luck moving
it further than that.

And so, this question:

I know that by heating the yoke, I should be able to get
some expansion, and that should make removing it a bit
easier, but I have no idea how hot I want it to be to have
benefit, but without damaging the thing.

Also, whatever (approximate) temperature I was to shoot for,
how would I know when I was there?

I am clueless, and would appreciate any help on this hassle.

My torch, and I await...

Many thanks,
--
Kenneth

If you email... Please remove the "SPAMLESS."

You've tried "wedging techniques". Have you tried a gear puller or
the equivalent?


Hi again,

It would be impossible to describe the problem verbally, but
there is no way to use a puller. Earlier today, when I was
away from the machine, I thought that it might work. I
headed back to my shop, grabbed a puller, and took it to the
blower. It was immediately clear that it could not work. I
just can't get any pressure to the shaft because the yoke of
the universal is in the way.

Thanks for any further thoughts,


Any way you can rig something onto the business end of a slide hammer to
bop it off with?

You didn't describe the universal joint in detail, but if it's still all
assembled I'd be leary about using heat because of possible damage to
the bearings or other parts of the U-joint.

Jeff

Hi Jeff,

As you may have seen elsewhere in the thread, I finally did
get it off.

But you are absolutely right about some caution with heat on
the U-Joint. I had been aware of that, and certainly would
not have heated the thing to the point that some had
suggested.

All the best,
--
Kenneth

If you email... Please remove the "SPAMLESS."