mk1-forum.net

Hi

In the absence of the original Churchill BMC tool, can anyone recommend a suitable tool/ puller on he market to remove the 1st motion outer race and idler gear bearing from the transmission casing on a Mk1?

Thanks for any advice.

two methods I use

1) put the case in an oven for 1/2 hour at a decent temperature.

once its nice and hot, drop the case onto a nice solid bit of wood, the bearings will just drop out with the shock, if your really quick you can et the new bearings in during the same 'heat cycle' particularly if you have left them in the freezer

obviously you need a oven where burning paint/oil isn't an issue

2) with a mig welder run a bead of weld around the inside of the outer race, again, it will just drop out with a 'shock'

if your using this method on the idle bearing you need more care as the outer race is pretty thin, ive done it before by welding a bolt to the outer race, putting the bolt in a vice and smacking the case with a mallet - it worked, but wasn't very satisfactory.

ive the proper chuchill puller for this and it makes it an easy job - you can achive the same results with one of those universal expanding slide hammer pullers

Thanks for the advice I'll give those methods a try. If it smells a bit in the oven I'll just say it's a new brand of cooking oil..

Cheers

Guess-Works has a short how to vid on his website.
http://www.guess-works.com/Tech/spigot.htm

This is the factory advice on removing and refitting it;-



Have a look at Syke Pickervant. They have a range of Internal Collet style grips for removing bearings such as these and they are very reasonably priced. They are designed to be used with a slide hammer, however I have mine on threaded rod so I wind them out on a nut, rather than use impact.

The oven method that Rich refers to above has never failed me yet.

Everything does need to be clean though, a bit of grit between housing & bearing race can bugger everything up.

M

While I haven't done it the way Rich has suggested, I don't see anything wrong with doing it that way, I'd say the biggest points are, to heat the whole case evenly and slowly without getting it unduly hot.

Single spot heating, especially with an intense concentrated heat source, like a blow torch, should be avoided.

Thats why we use an oven. I have an old kitchen job in the workshop which we use for this. About 150° for 30 mins seems to do the trick every time.

M

mk1 wrote:Thats why we use an oven. I have an old kitchen job in the workshop which we use for this. About 150° for 30 mins seems to do the trick every time.

M

Served with chips or salad?

I guess the kitchen can be a useful resource. I did steal the missus dishwasher for doing hot washes Great for gearbox cases and leaves ones hands oh so soft.

Can also lead to divorce.

M