Lynx II, hull # 4225

[Lynn Eades]

Rick it worked like this (back in the day) I hope this helps. If you already know, It may help someone else.
Henry Ford had a number for each basic item.
For example;
A block is a 6010 this covers all blocks cars trucks tractors, 4,6, and 8 cyl etc.incl. America, Canada , England etc.

To get down to a particular defined model, you take the number that you have located on the exploded engine picture and you now hunt for it in the written section. There you will find that basic number (6010) but it will have various prefixes and maybe, suffixes with that number.
For example: (Andrew's supplied number) C99A-6010
The Ford of Canada 1941 to 1947 parts book(post war?) only supplies a C59A 6010 S block as a service part.
The 48 to 51 truck parts book lists a C69A-6010-S for the 48 engines (last with center water outlets) while my parts book for the war time CMP rear engined chassis (3 models) list a C19A-6010 S block.

So if you follow that you will now understand that Crankshaft pulley 6312 without the prefix, refers equally to an English built 4 cylinder Consul engine pulley.

Rick, you have mentioned the single sheave water pumps. Is this what is needed to fix this alignment problem? Is the belt centerline different from the two C.L's on the double sheave pumps
This book covers the CO11QR, C191QR, and C291QR. All these engines use single sheave water pumps. Does the Lynx use the same build motor?

[Mike Cecil]

Following on from Lynn's post, the basic c/shaft pulley number is, as he and Rick said, '6312' which is applicable to any c/shaft pulley - GP-6312 is for the Ford GP, GPW-6312 is for the jeep, 81T-6312, 91A-6312 and 21A-6312 for various configurations of V8. The Lynx workshop manual diagrams just provide the basic item number, not the essential prefix: you would need a Lynx parts list for that.

Peter, I note the manual shows a single belt pulley configuration for the Lynx Mk3 and 3*, rather than the twin belt pulley configuration common on CMP trucks. So I'm surmising that you have gathered the various parts from other places, ie not originally taken off your Lynx during restoration. (I have not followed your forum posts closely: you may have explained that previously).

I'm suggesting, with the variety of (1) water pump pulleys (2) generator front plates (3) generator pulleys and (4) crankshaft pulleys that were available for V8s in various applications, that that may be the source of your misalignment - a mix of items from different applications. The 1941 master parts list shows that there were 13 different generator pulleys, either twin or single pulley, produced between 1928 and 1940, varying in size from 3.58 inch diameter to 5.18 inch diameter, and seven different generator front plates, which, combined, gave 20 different combinations of generators. The same applies to crankshafts, crankshaft pulleys and so on: there are multiples listed up to end 1941, so the number probably only increased after that.

To overcome the problem, a set of matching items would need to be located. Easy to say, of course, but an intact 'junker' V8 may provide you with such a matching set.

Mike

[lynx42]

Originally Posted by Mike Cecil

Following on from Lynn's post, the basic c/shaft pulley number is, as he and Rick said, '6312' which is applicable to any c/shaft pulley - GP-6312 is for the Ford GP, GPW-6312 is for the jeep, 81T-6312, 91A-6312 and 21A-6312 for various configurations of V8. The Lynx workshop manual diagrams just provide the basic item number, not the essential prefix: you would need a Lynx parts list for that. Mike

Mike The numbers I quoted came straight out of this book.

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I didn't think it was refined enough but it is all that I have.

Regards Rick.

[Andrew Rowe]

Lynx used the single crankshaft pulley to serial #3000 and after that went to the double crankshaft pulley. I think the fan extension on the single pulley was used in some 1941 trucks as well , so was a common part that was adapted , not so sure about the double pulley , I think that was specific to the Mk2 Lynx .Cheers Andrew

[Lynn Eades]

Is anyone sitting on an engine build spec that covers the Lynx?

[Peter Duggan]

Guys,

I continue to be amazed at the level of knowledge and willingness to share with MLU members.

I'm now convinced that the issue rests with the water pumps. The parts manual for the Lynx calls for C29SR 8505 and 8506 for the pump housings. My LH pump housing has the number 79 8505.

I think the most unobtrusive way of correcting the alignment is to add a 5/8" spacer to the inside of the pulleys themselves. I will confer with my local machinist as to the practicality of this idea. Any suggestions or comments would be welcome.

I have yet to find any differences between the engine blocks themselves.

Peter

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[David Herbert]

Originally Posted by Peter Duggan

.....I'm now convinced that the issue rests with the water pumps......I think the most unobtrusive way of correcting the alignment is to add a 5/8" spacer to the inside of the pulleys themselves......
Peter

The pulleys are just pressed onto the shafts, you just need the correct pulleys. T16 ones would be very close if they are not the exact ones you need. There would be little scope for fitting spacers as the pulleys are not pressed on untill they hit a sholder but untill they are flush with the outer end off the shaft. This means that you have some latitude to use the wrong pulley by not pushing it all the way on but you can not press it more than intended because it will hit the end of the pump housing.

David