Morris C8 Crankshaft specs.

[Lynn Eades]

Terry, Jeff should be able to guess closely what the original size was,judging from the type and size of shells removed?
I have some details here in front of me for bi metal steel backed bearings:
Babbit on a steel back is usually 0.004"thick.
Copper/lead is overlaid ) 0.008" to 0.020" thick
Tin/ Aluminium is the same, 0.008 to 0.020" thick.
(I guess a known steel backing thickness is needed)
Tri metal bearings are usually the same as the last two with the addition of 0.001" of babbit
Do you have a source of shells?. I guess you ask them to give you a shell tunnel size (measure them) and if they sound right, have Jeff grind to suit after you have them in hand?

[Richard Farrant]

Thinking outside of the box, the early Nuffield tractors had a Petrol/TVO version of the engine in the C8. Obviously this should be checked out just in case there are any slight differences in crank mains and pins, but have a look at this download and check the Spec on the petrol engine crank on page marked at bottom 'General Data 9'.

http://vieux.tracteurs.free.fr/pdf/nuffield_1.pdf

regards, Richard

[T Creighton]

Thanks for that link Richard. Most helpful.

It is a pity the Morris book did not have all those engine particulars. Then it would be so easy to compare.
Some of those Nuffield numbers look familiar though.
I have looked at "Sparex" Nuffield pistons but they do not seem to be flat tops like the Morris truck.
I will go and do some measuring.

Kind regards, Terry

[Richard Farrant]

Originally Posted by T Creighton

Thanks for that link Richard. Most helpful.

It is a pity the Morris book did not have all those engine particulars. Then it would be so easy to compare.
Some of those Nuffield numbers look familiar though.
I have looked at "Sparex" Nuffield pistons but they do not seem to be flat tops like the Morris truck.
I will go and do some measuring.

Kind regards, Terry

Hi Terry,
If the Sparex pistons are concave on top, then they are low compression ones for the Vapourising oil Nuffield.

With that link I sent, there are more, if you want to see more on the Morris engine, substitute the 1 in the web address, for 2, and 3.

I cannot understand why the crank details are not in that C8 book, all similar army manuals for Austin, Bedford, etc. include this.

regards, Richard