differentail bearing removal tool

[GMichaels]

I need to make a differentail bearing removal tool for a dana 70, can someone post a picture of one, or describe it, this way I don't have to reinvent the wheel.



Thanks

 

[dan brooks]

Are you trying to remove the carrier bearings?



Because Dana - in their infinite wisdom - failed to provide notches for puller jaws, we had to use a large, blunt-tipped chisel to drive the bearing away from the carrier enough to get a two-jaw puller in place. You can try to use one of these, but the one I tried flexed so much that it wasn't much help.



Before installing new bearings, I'd suggest using a die grinder to add two notches 180* apart, deep enough to get the jaws of a puller in next time you have to replace the bearings.

 

[GMichaels]

Ya I have that bearing remover allready, it got the old bearing off, but was damaged when I was done. I don't won't to bend the new bearings.



I just got done making a puller, will let you know how it works.

 

[1stgen4evr]

bend the new bearings

And that is exactly what will happen if you don't do the notches in the shoulder behind each bearing. As you install and remove the bearings to get preload correct, the bearing land will get looser. That can be bad as well. If there isn't any wear on the housing where the cups rest against their shoulders, you might get lucky and find that the original shim pack is correct. That way, one shot will do it. But put the notches in to be safe.



1stgen4evr

James

 

[MMiller]

For setup, I took some old carrier bearings and my flap wheel and opened up the inside of the bearings so they slip on and off the carrier. This way I can change shims to get them setup correctly. FSM explains this too. The tool group to use is $$$ but works well. You put the bearing cup on the bearing and the puller pulls on the cage of the bearing, but causes no damage because the cup is holding everything together.



I do not own one of these, I ususally go to a nearby drive train shop and they charge a small fee to pull the bearings.



Michael

 

[GMichaels]

I didn't think of that, using the cup to keep everything in place. I made something that uses the notches, and pulled it. looks ok, will run a 100 miles or s and double check that everything is ok.



If anyone has a picture of this tool would like to see it.

 

[MMiller]

The puller is just a threaded rod and round tube that is the same demension as the carrier, where the bearing presses on. There is varoius sizes of the collars for different size bearings. You put the cup on the bearing and this tool hooks onto the cage of the bearing. I was scared to death the first time I used it. But is works like a dream. A buddy priced the tool group at like $600. Kinda steep for me to use it once every couple of years.



Hope this kinda helps. I have no idea where to get a pic of it.



Michael

 

[GTX_Joel]

Go to the auto parts store and look at the ford power steering pully puller. The same basic design works for Dana carrier bearings, only bigger. It has steel donut. The donut has a groove inside that the bearing fits into. The donut is cut in two, like it was laying on the table and you chopped down on it with a knife. Since it is cut in two, you can assemble it around the bearing. Then a tight fitting sleevedrops around it so it wont come off the bearing. Then you pull on the donut.

I hope this helps, good luck.

 

[GMichaels]

I think I understand. but if your still pulling on the cage, even with the cup clamped to the cage, seems like there would be some damage?? i don't have a bearing and cup in front of me, but will have to check it out.

 

[MMiller]

Yeah thats how I remember it. I could not believe it either, but as long are the cup is on the bearing you are tecnically pulling on the rollers and not the cage. Now that you are very confused I will aplojize If you think about it, what else could a puller hook on to then the cage. With the cup on the bearing, the cage really can't move, and really the rollers, and cup are pulling on the inner race of the bearing. If you forget to put the cup on, then my buddy says you usually get a shower of rollers, when you start pulling. You need to take a trip to a local drive train shop and ask to see the tooling. Usually they sell tools.



Michael