Philip's thread of 660XYB stuff

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Old and Slow
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Philip's thread of 660XYB stuff

Post by Old and Slow » Mon Jun 01, 2020 5:46 pm

The preliminary diagnosis is the planet carrier bearings are on the way out. Even if it is something else it needs a rebuild; :( Time to get the spanners out.
As you say Mark, shame they put the Jag gearbox in. Anyway it's better to have a recon o/d in the car instead of the money in the bank generating 0.01% interest - the value of the car ought to go up by at least the cost of the rebuild, don't ya'll think!
Any suggestions for a carrier suitable for taking the o/d up to Sheffield?


Philip Needham
Ashley-bodied TR3; '54 Ford Consul; '55 AC 2-Litre Saloon;'65 850 Mini; '70 Ford Zodiac MkIV; XR3i
'81 911SC Targa, '64 Sabre Six

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Philip's thread of 660XYB stuff

Post by Old and Slow » Tue Jun 02, 2020 12:51 pm

I started dismantling this morning, removing the prop shaft. One of the needle roller bearings had collapsed/rusted so I'm replacing them and then a test drive to see if this was the problem after all.
Two questions: Are the needle roller bearings s a press fit in the yokes or should they slide in with only a bit of friction?
Also, yoke alignment is critical; I think I read on an MGB forum the yokes on the ends of the shaft must line up, and the yokes on the flanges should line up (obviously 90 degrees difference compared to the shaft yokes). Is this correct?
Thanks for answers, I'm hoping to put the prop shaft back in later today, or tomorrow when rain is promised.


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Philip's thread of 660XYB stuff

Post by philhoward » Tue Jun 02, 2020 3:29 pm

Your yoke alignment theory sounds correct.

Never replaced a spider joint so not sure..


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Philip's thread of 660XYB stuff

Post by chrisgallacher » Tue Jun 02, 2020 4:07 pm

Old and Slow wrote:
Tue Jun 02, 2020 12:51 pm
I started dismantling this morning, removing the prop shaft. One of the needle roller bearings had collapsed/rusted so I'm replacing them and then a test drive to see if this was the problem after all.
Two questions: Are the needle roller bearings s a press fit in the yokes or should they slide in with only a bit of friction?
Also, yoke alignment is critical; I think I read on an MGB forum the yokes on the ends of the shaft must line up, and the yokes on the flanges should line up (obviously 90 degrees difference compared to the shaft yokes). Is this correct?
Thanks for answers, I'm hoping to put the prop shaft back in later today, or tomorrow when rain is promised.
Needle roller bearing caps should be a press fit into the yokes (vice and a socket job etc), but they are often not that tight. And they do wear, to the extent that if play is evident between the yoke and the cap then the yoke - and therefore the propshaft - may be rendered scrap.

I took my prop to Propshaft Services near Heathrow a few years ago suffering from drivetrain vibration at certain revs and, apart from the need for balancing with new weights, I had wear between the caps and yokes at one end. I think the bloke took a hammer to the outer of the yoke in several places and re-fitted a new UJ, but he did admit this was just a short-term fix (read bodge). Having a new propshaft made up is not expensive, and I do recommend Propshaft Services despite the bloke with the hammer.


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Philip's thread of 660XYB stuff

Post by Old and Slow » Tue Jun 02, 2020 8:14 pm

Thanks for the feedback Chris.
I have the opposite problem - the needle roller bearings are an interference fit in the yokes. I'd preferred something a little easier to assemble and don't mind a bit of loctite!
I've renewed the duff end - at the gearbox - now to rebuild the drive train and take it for a run. If the original noise is still there then it's out with the O/D and I can take my time doing the other UJ. The new ones are fitted with a grease nipple so lubrication should no longer be an issue (provided I remember to grease them regularly (once every 5 years :) )).


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Philip's thread of 660XYB stuff

Post by Old and Slow » Tue Jun 02, 2020 8:40 pm

Oh, and Phil, I agree - as the yokes are both fixed on the prop shaft (in line) and non-removable, it is not a problem, but thanks for commenting - all feedback gratefully received...


Philip Needham
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Post by philhoward » Tue Jun 02, 2020 9:48 pm

Wouldn’t be the first time a prop has been made wrong...


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Philip's thread of 660XYB stuff

Post by Old and Slow » Wed Jun 03, 2020 11:17 am

Well, as they say round here:
There's never nowt but wot there's summat!
Spent all day yesterday trying to get the UJ "aligned" properly, so this morning I took it all out again and put it next to the original. This is the picture...
P1030107.JPG
Old and new UJ
P1030107.JPG (377.17 KiB) Viewed 822 times
Didn't know they came in two versions - the right one and the wrong one...about 6 mm too narrow.
So, where's the best place to get the correct size, is there a special code for these at GW or QRG?


Philip Needham
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'81 911SC Targa, '64 Sabre Six

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Philip's thread of 660XYB stuff

Post by scimjim » Wed Jun 03, 2020 11:45 am

Did the new ones come from GW/QRG?


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Post by Old and Slow » Wed Jun 03, 2020 12:03 pm

No Jim,
Can't remember where from - probably fleabay or somesuch. Looked in my parts file but can't see the receipt etc.
I've just contacted QRG to see if they have them.


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Post by philhoward » Wed Jun 03, 2020 12:31 pm

Depends who made the prop - I’m guessing it’s not an original Sabre6 prop?

I think those UJs are virtually always an industry based size - and may go up in 1/4” increments? Bit like taper roller bearings are by bearing size (usually) - so one from a Renault is also found on a Jaguar (for example).


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Post by philhoward » Wed Jun 03, 2020 12:32 pm

Also check your grease nipple doesn’t get caught up during movement - differing lengths usually fix it depending on the yoke used IIRC.


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Philip's thread of 660XYB stuff

Post by Old and Slow » Wed Jun 03, 2020 1:01 pm

Turns out there are three standard sizes: 75 mm, 82 mm and 95 mm.
The Landie supplier "Paddock Spares" has the 82 mm size available at £5.82, in case QRG don't stock them.


Philip Needham
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Post by scimjim » Wed Jun 03, 2020 3:59 pm

3” 3.25” and 3.75” then?


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SECURE DRY STORAGE FOR YOUR SCIMITAR

Current: SE5 (8Ball), 1400 1600 1800 Zetec ST170 powered SS1 (G97), 2.5TD SE5a (diesel 5a), 6 x random other SS1s.
Previous: SE5, 3 x SE5a, 2 x SE6a, 3 x SE6b, GTC, 2.9i GTC, 3 x 1600 SS1, 1300 SS1, Mk1 Ti Sabre, Mk1.5 CVH Sabre, TI SS1 (snotty), 1600 SS1 (C686CCR).
Chief mechanic for: 1400 K series SS1 (Megan3), 1400 CVH EFi SS1 (Grawpy), 1300 SS1 (Number One) & Sarah's coupe.
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Philip's thread of 660XYB stuff

Post by Old and Slow » Thu Jun 04, 2020 11:00 am

Hi Jim,
I'd imagine the imperial sizes are correct, as I believe Hardy Spicer had the patent on these back in the day.
This time I'm going to put the UJs in the deep freeze for an hour or two before trying to press them in. Also, freezing the grease might help keep the needle rollers in place!! :)


Philip Needham
Ashley-bodied TR3; '54 Ford Consul; '55 AC 2-Litre Saloon;'65 850 Mini; '70 Ford Zodiac MkIV; XR3i
'81 911SC Targa, '64 Sabre Six

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