Adaptor shaft

**workingonit** · 4th February 2015, 08:31 PM

Lotza.

I found there were differences in LRover SAE10. The differences were apparent when comparing the early (1984) RRC SAE10 axles to the SAE10 found in the input gear of later vehicles - the input gear was larger in diameter by approx 2mm.

Need to clarify what is meant by q6 - it has a flat face where the securing nut exerts its force, and flat face where the driveshaft mates. Are you asking if the flange is essentially bell shaped with a flat landing a the 'bottom' in the centre for the bolt and flat face at the rim?

You will some detail here

http://www.aulro.com/afvb/attachment...-removed-z.jpg

http://www.aulro.com/afvb/attachment...ded-view-z.jpg

Will try to get the other information.

Q8 however is quite hard.

For Q8 the Outcast case will need to be mounted to the gearbox, then mount the MSA flange, then mount the Outcast flange. The MSA flange and Outcast flange have to be drawn together by bolts to overcome the friction fit - then they are is a bugger to get apart again. The Outcast case location holes are very precisely located and requires very parallel alignment to the t/c before the two can be brought together - don't get it right and the pins won't locate to their holes. I only have one engine crane to handle the weight of the gearbox and a lot less muscle to lift the t/c into the right position let alone push it home. I'll do an approximation by measuring individual units when apart, but there may be a few millimeters error.

And what do you mean OD of the nut?

**steveG** · 4th February 2015, 08:43 PM

Here are the 2 MSA flanges I'm aware of.

DRIVER;COUPLING for Isuzu NPR. #8-94476-694-0
DRIVER;COUPLING for Isuzu NPR. #8-94178-510-1

The only difference AFAIK is splines - but no clues as to which is which. My box has 20 spline output. My local independent parts guy couldn't find anything in his parts info to confirm.

Steve

**Vern** · 4th February 2015, 09:04 PM

Pity no pictures Steve. When I get mine out I'll take it down to Isuzu.

**Vern** · 4th February 2015, 09:18 PM

Oops

**steveG** · 4th February 2015, 09:32 PM

While I'm not a fan of adding a spacer between the flanges, it would allow you to keep the Isuzu flanges standard, and use the internal diameter of the spacer for for location purposes on the original register rings.

Steve

**Vern** · 4th February 2015, 09:36 PM

Steve, I don't think I would need to make a spacer if workingonits measurements are correct. If need be I may be able to space the flange that's on the gearbox back a couple of mm, but I have no idea about that until its apart

**Lotz-A-Landies** · 4th February 2015, 10:15 PM

Just to take a tangent (because I'm not convinced that a flange is the way to proceed.)

The idea is to use an internally splined sleeve with the Isuzu spline with a shoulder mid tube ( length of the protruding MSA spline) to allow the mainshaft to be tensioned.

Into the other end of the tube is the spud shaft splined to match the Isuzu box then the shaft continues at 42mm till it passed the seal on the LT230 when it is reduced to the 10 spline of the LT230 input gear.

**85 county** · 4th February 2015, 10:46 PM

Originally Posted by Lotz-A-Landies

Just to take a tangent (because I'm not convinced that a flange is the way to proceed.)

The idea is to use an internally splined sleeve with the Isuzu spline with a shoulder mid tube ( length of the protruding MSA spline) to allow the mainshaft to be tensioned.

Into the other end of the tube is the spud shaft splined to match the Isuzu box then the shaft continues at 42mm till it passed the seal on the LT230 when it is reduced to the 10 spline of the LT230 input gear.

and how are you going to machine broach that??

**workingonit** · 4th February 2015, 10:57 PM

I've put Sheldons shaft per Verns specs and the OUtcast for comparison. Assuming both Verns and my MSA flange are the same.

Can't tell you the pitch circle dia as I understand it to mean ie the pressure friction contact point of the gears?

IMGP3248.jpg

**Lotz-A-Landies** · 4th February 2015, 10:58 PM

I'm not a machinist and it is here for discussion. Perhaps it could be a groove and circlip, perhaps the splines at each end are different or that there is a splined plug pushed into the sleeve and pegged from the outside.

So far no one so far has been able to confirm whether the MSA prop shaft flanges are true and balanced. There doesn't seem to be any pegging of the interface between the flanges and there doesn't seem to have been any machined and fitted bolts between the flanges.

Looking at the failure of Vern's shaft something was not right and I suspect its the flange and not Sheldon's shaft.

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