Another "how do I unstick this" thread

Regular followers of my farming machinery butchery may recall
http://www.flickr.com/photos/siwilson/3415919074/in/photostream

Well I managed to recover it with the use of a die nut borrowed from Mr.
Bonwick.

The damn bearing in the thing has seized up again, and, I can't get the
£$%"£$%"% thing apart *again*.

http://www.flickr.com/photos/siwilson/5635030018/

I've resisted the urge to beat hell out of it with a lump hammer, as
that is how I knackered it before. I bought myself a really nice
hydraulic puller, clever I thought. But all it does is bend the pulley
because it's only made of thin metal of course.

Any suggestions on how to get the durn thing off?

 

I missed this particular episode last time, but it definitely sounds
like time you invested in a decent gas torch. That looks like a prime
candidate for heating the pulley to cherry red, then dousing the
spindle with nice cold WD40 before giving it a whack (with the nut
on...).

 

You mean like a gas blowlamp/plumbing type thing? They just never seem
to get things hot enough. I could try though I s'pose.

 

No, I mean a proper oxy-acetylene type thing, or gas axe. The plumbing
type are fine for nuts but not the sort of stuff you keep tackling.

 

Ah yes. If I had one of them then I know I could do all sorts.

 

I'd make a brass bush drilled and tapped to suit the thread and try
hammering it out but you might prefer to put the nut back on so it's
just proud of the end of the shaft and hit that.

 

Believe it or not I had the nut on last time. I think the shaft must be
really soft.

 

The wood thread is up there ^^^ somewhere.

 

Or wrapping the spindle with a bag of ice for 1/2 hour before heating
the pully.

 

<fx: awaits sound of ambulance sirens>

 

This might be better done when it's off, but is there enough metal in
the central boss to drill and tap two M8ish holes at 180deg to each
other?

This would be so you can put two bolts through a thick plate and into
the drilled holes, with another bolt through the centre of the plate so
you can tighten that onto the shaft and make a puller from it?

Had to do similar to get a wheel bearing off a half-shaft on my
Landrover. Bearing went west and hub welded itself to half shaft ..

.... or drill and tap whatever thread size can fit and buy a bearing
puller to suit .. or buy a bearing puller and drill/tap to suit ..

something like this .. http://www.tooled-up.com/Product.asp?PID=143797

 

Actually that's a good idea. I might be able to drill/tap all the way
through it and push it off by doing up the bolts.

I'll have a look.

Thanks.

 

No worries. It being farm machinery you might not have enough meat
behind it to bear against and the bolts might punch holes through, so
maybe use another plate for the bolts to bear on.

 

Yes, I've got to admit there's a lot of potential for "unintentional
events" if I got one of those toys in the garage.

 

A proper plumbers propane torch (i.e. not a piddly blowlamp) is what
i'd use on such an item. Nice spread of heat ...

Plumbers freeze spray is also useful. But probably not at the same
time

Paul.

 

Gah, I was all ready with a 'Fnarr' too ..

Paul.

 

As a gas axe has already been suggested... is there room to get a tuning-
fork type swivel puller under the pulley hub and beat that in? They're a
very, *very* satisfying tool to use because you can have at the job with
a large lump hammer.

 

Ooh, another good suggestion, thank you, and an excuse for a
not-too-expensive new tool I think.

<googles>

 

..............and if the threads strip you can always weld nuts on the
reverse side once you've shifted it.

If the threads strip before you shift it - blu-tak a nut into a spanner and
slide it behind the pulley and wind a bolt in through the hole.