Renewing my transmission : tools

[georgesgiralt]

Hello Guys,
My transmission (post 1981) need at least new bearings. Last time I did it, I had access to presses ranging from 5 tons to 350 tons.... And the people knowing how to handle them properly and efficiently.  So the job was easy!
Now, I'm retired and can't reach neither the people nor the presses ! A friend of mine has proposed to lend me an hydraulic puller like this one ( not the same brand nor box color but strangely look exactly the same ) : https://www.ebay.fr/itm/322324754034?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649 (I give you the bay link but one can find these on a lot of sites selling what I suppose is Chinese product).
My friend use them to pull out parts on agricultural equipment so can't tell me what.
My question is :
1) will I be able to pull all the bearings in the trans with this ?
2) And will I (and how) will I put the new bearings in ?
So I'm looking for advice from people having done the work themselves  Is it proper ? Should I use a press ? Did you have problems with such pullers ? How did you solve them ?
As you can see a lot of questions !
Thanks in advance for your help !
Have a nice and bright day !

[Tony Smith]

According to Mr Scriminger you can replace bearings in a gearbox using a bearing seperator/puller. Be is probably right.

I have a 12 ton press which I have used to replace bearings. It is too light to completely strip the shafts, for that a 50t press is needed.

[georgesgiralt]

Hello Tony;
Thank you for your answer.
As it was in 1997, I can't remember which press was used and it's power. But I wonder which part is needing 50T to disassemble ?
Last but not least, do I need to disassemble all shafts to ascertain the wear and list of parts ?

[Justin B.]

It's been a long time since I rebuilt one but I don't remember using my press.  What Tony mentioned jogged some grey matter so I think that is how I did it.  You will need to make a tool for removing the nut that secures the front driveshaft yoke to the output shaft.  I also drilled a couple of holes in some angle stock and bolted it to the trans then in the vise.

I would post up some pics but I'm up in the mountains far away from me picture repository. 

[georgesgiralt]

Yes, Justin, I've got the tools to remove the coupling and a sturdy bar to hold the transmission and lock it hard on the bench. Including the propane torch.
All I miss is a way to remove the old bearings, dismantle the shafts and reassemble them back. I thought an hydraulic puller (10 Ton) was sufficient but Tony disagree.....

[Tony Smith]

No I do not disagree at all.

The seperator/puller in the link you posted will change the bearings l, you will only run into trouble if you need to change the layshaft, some of the gears are a very stern interference fit.

But, to change bearings you will be just fine with the tool you have.

[georgesgiralt]

No I do not disagree at all.

The seperator/puller in the link you posted will change the bearings l, you will only run into trouble if you need to change the layshaft, some of the gears are a very stern interference fit.

But, to change bearings you will be just fine with the tool you have.

Thanks Tony,
And that bothers me. Because I would like to disassemble all 3 shafts to check and verify everything.
And I do not know anyone near me having a 50T press....

[Tony Smith]

Hmm. My take is that if you need a 50t press to get a gear off the shaft that its internal condition is still as good as the day it was put on the shaft. What is relevant is the condition of the working faces of the gear a d they can be inspected without removal.

There is something that cost me a lot of money till a penny dropped - shims.

I spent a fortune on shims from BMW until I realized they are standard engineering shims. I bought 15 dollars worth at a supply company and I reckon that will be a lifetime supply

[Justin B.]

I don't remember needing my press to get the gears off just a regular mechanical gear puller the the bearing separator set I got from Harbor Freight.  If I was home I have detailed step-by-step pictures of the disassembly and assembly.