Lister CS crankshafts

The later part nos for the cranks and big end bearings are the same whilst those for the rods are different. I would guess that the only difference between the rods is the width across the little-end (as a consequence of the different bore and thus piston-boss size). Worth bearing in mind that early 3/1 and 5/1 (about first two years?) shared the L crank with 1 3/4" main journals. IIRC when the CS switched to 2" mains so did the L. hth

Thanks Ronald,

None of my 3/1 engines are earlier than 1948.

The parts manual I have shows the following:

3/1 Big end bearing 5-1/D8A/9A

3/1 Con-rod 208/18

Does a later manual show the crankshaft to be a common part i.e.

The Lister parts numbering scheme must have kept many a storeman puzzled, and many a customer bewildered.

Thanks in advance,

Ken

Nek Yes it does. Still later the 5/1 switched to steel-backed shell bearings which may well explain the other differeences. BTW I'm referring to the reprint manual/parts list available from

hth Roland

Are the (3/1 and 5/1) Con Rod lengths the same? Perhaps the stroke is slightly greater on the 5/1, requiring a different crankshaft?

Mark

Ken_Boak wrote:

My 3/1 dates to 1937. As a guess I'd say the big end dia will be greater on a 5/1 than a 3/1, I'll measure mine up. The strokes are the same for both the 3 and 5 @

for both the 3 & 5 (and for the 10/1!), so the difference could be just the big end od. Simon

My big end diameter is 2.25" x 2.375" width, my father suggests the width of the big end bearing could also be greater on a 5/1 but having the same diameter, giving a larger working area.

I'll have a look at the cranks we have in the workshop and see what size(s) they are.

Width should be the same.

Peter

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