Diff Oil Seals

[MK3]

Will one of these 6" pullers be able to remove the bearing on a MK3 Spitfire Diff output shaft ?



Or will it require a commercial / garage press to do it ?

[Velocita Rosso]

No ,not on its own but a split bearing puller will , alongside it
Put the split puller behind the bearing and then use the legged
However in some circumstances you may need more force like a small press
https://www.google.co.uk/search?q=split+bearing+puller&rlz=1C1CHMO_en-gbGB493GB493&espv=2&biw=1440&bih=785&tbm=isch&imgil=IzMzbj4-JtMJsM%253A%253BFtFwDlNKHBkojM%253Bhttp%25253A%25252F%25252Fwww.harborfreight.com%25252Flarge-bearing-separator-3979.html&source=iu&pf=m&fir=IzMzbj4-JtMJsM%253A%252CFtFwDlNKHBkojM%252C_&usg=__CU2jJxiyGGWFoOolGhUo_465Mc4%3D&ved=0CFgQyjc&ei=ZiF6VNuRMIreOI7mgKAD#facrc=_&imgdii=_&imgrc=IzMzbj4-JtMJsM%253A%3BFtFwDlNKHBkojM%3Bhttp%253A%252F%252Fwww.harborfreight.com%252Fmedia%252Fcatalog%252Fproduct%252Fcache%252F1%252Fimage%252F9df78eab33525d08d6e5fb8d27136e95%252Fi%252Fm%252Fimage_18479.jpg%3Bhttp%253A%252F%252Fwww.harborfreight.com%252Flarge-bearing-separator-3979.html%3B1200%3B1200

Dont forget to take the spring clip out of the shafts groove first  

[yorkshire_spam]

I had to destroy the bearings to get them off the shafts on mine.
I bent the bearing splitter/puller trying.

[Velocita Rosso]

6797 wrote:

I had to destroy the bearings to get them off the shafts on mine.
I bent the bearing splitter/puller trying.

So, you see....in some scenarios....you need a press......or, Sams too strong for his own good ;D

[MK3]

The diff is caked in fresh oil and dirt so its leaking oil from somewhere but generally it tends to be the input oil seal on diffs that leak. And as it's now off the car it's too late to wipe it, run it and check it.

So although I have 3 new seals and a paper gasket, if removing the bearings off the shaft is troublesome,  should I just change the input seal and leave the output seals alone and see if any leak.

If one does then it's not a huge job to uncouple a half shaft UJ and pull out the leaking output shaft and tackle the seal at that time ?

[yorkshire_spam]

Just FYI.... the bearings are not that expensive, even for quality like SKF 6502 (3.71+vat incl delivery from qualitybearingsonline)
My splitter/puller couldn't get hold behind the bearing, so I smashed the outer race and then ground the inner down and split it with a chisel (wearing appropriate eye protection obviously!)

[Velocita Rosso]

Yes you can change the output seals in situ but you may as well do the whole lot whilst off the car
However, did you check that the split pin breather was not blocked hence pushing out any oil?
Sometimes if the breather is blocked then oil can be pushed out of good diff seals

[MK3]

Diff manual posted online showing breather hole

http://www.triumphspitfire.com/images/pdf/DiffTSTN.pdf

I can't find SKF 6502 bearing on that web site, is that the right number for the output shaft bearing - if I need one ?

[drofgum]

MK3,
A note of caution: before you purchase bearings check the serial number of your differential unit. Mk3 Spitfires had a change during production. Units with serial numbers higher than 120000 have different output shaft bearings to earlier units. These later units also have stronger output shafts. Sadly the stronger parts won't fit the earlier units.
                                                                                    Cheers,
                                                                                    Paul

[MK3]

Input oil seal done, casing paper gasket done, the split pin breather was stuck solid so freed that up too, thanks for the tip, just the output seals now when I can get a decent puller.

The car is a late '70 MK3 so I presume it has the stronger output shafts, thanks Paul

Anyone know what the bearing number would be should I need a replacement ?

thanks

[drofgum]

Mk3,
The Triumph part number is 128572 for the later bearing. I tried looking it up in a Timken cross reference , but there is no listing for that number.
                                                                              Paul

[yorkshire_spam]

6205... my mistake! (6502 is an 8 bit microprocessor!DOH!)

[pto]

its a 6204

[MK3]

Tried all sorts of pullers on the output shaft to get the bearing off but the mounting plate was beginning to bend so resorted to a strong vice and a BFH - copper one - couple of "taps" and it was out and not a single mark on the splines. :)

All back assembled and ready for back in. But before I do that I might as well take the rest of the suspension off on both sides and check the bushes and UJ's are OK.