9 replies to this topic

[Nugget]

My Genuine Repco RT4120 Torque Wrench just sheered of an upper stud of my diff housing as I was torquing the new Fiff in. 35ft/lbs.
Before I go to in with a hammer, the stud or the torque wrench, could someone please tell me are this press fit or screwed in?
I.e. can i simply tap the stud out with a big hammer?

Are replacements available or will I need to weld in a 3/8th UNC x 7/8 bolt?

[S pack]

Good question. The studs do have a hex head and what looks like an aluminium washer under the head which leads me to think they might screw into the housing mounting flange.

One way to find out, pull the diff out and see if the broken one will screw out. Might be able to simply go to the bolt shop and pick up a new bolt.

Worst case they are pressed in and you'll need to rob one from an old housing.

[76lxhatch]

^ I'm second-guessing it now, but before I read the above I would have told you they were splined like a wheel stud and a light press-fit (easy enough to tap out with a hammer)

[73SUNBURSTEXYOUWON]

My Genuine Repco RT4120 Torque Wrench just sheered of an upper stud of my diff housing as I was torquing the new Fiff in. 35ft/lbs.
Before I go to in with a hammer, the stud or the torque wrench, could someone please tell me are this press fit or screwed in?
I.e. can i simply tap the stud out with a big hammer?

Are replacements available or will I need to weld in a 3/8th UNC x 7/8 bolt?

What age is the torque wrench? Has it recently been calibrated?
35ft/lbs is not alot of torque by any means, the stud may have been fatigued too, more than likely.
The industry i work in, we have regular calibration done to our Torque wrenches.

Not everyone will calibrate torque wrenches, but its something to consider when a failure to part occurs during assembly processes.

[hanra]

Is this shot of mine any help?

Attached Files

•  7DF9E946-42D3-4168-B5EB-C986978C9A85.jpeg   126.09K   4 downloads

Edited by hanra, 16 June 2021 - 08:11 PM.

[claysummers]

They are splined. Tap out with a punch.


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[Nugget]

Thank-you. I've tapped it out. Came free OK. The Torque wrench is in new condition but for sure its 15 years old. The torque I set was right down the bottom of it's range which I can see can sometime be a problem. Desperately needs calibrating.

I am looking for a smaller one for this kind of thing. They seem pretty expensive.

 

I am going through old buckets of bolts. I am sure I have to put a long bolt centre in a short bold housing a while back ...20 years back :(

I went looking around the local shops today. No luck with a replacement

 

If I can't find one in Au I can order from here as a last resort;

https://www.doctordi...d-stud-kit.html

 

Does anyone know of a local source?

[S pack]

Try some local differential repair/conversion shops.

[claysummers]

Got some at home I pulled out of an old housing but they’re 60 years old and I won’t be back there for weeks. Get an appropriate size tensile bolt an tack weld head inside housing, that works. If it is at the bottom may weep.


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[warrenm]

The bolts are UNF not UNC.