B31 crankshaft endfloat

[Mrmick]

Hi, I'm in need of some guidance regarding 1953 B31 plunger. It has been completely disassembled for over 40yrs and I'm slowly getting it back together.
I'm currently assembling the crankcase, I cannot find a specification for endfloat and I am reading in the Munro book that the cush drive automatically sets the end play when tightened.
My question is should the crankshaft be shimmed to either centralise or restrict movement to within a specific range?
Further to that I  have been searching the various classic suppliers for crankshaft shims and so far have not found any for use on a B31?
I would appreciate advice before I proceed any further
Thanks

[neil1964]

The rod should be centred to the crankcase split line.
When assembled you should just be able to nudge the crank sideways each way with a click, then when definitively assembling make sure the cushdrive is tight and cannot come undone (Loctite blue better than tab washer!)
There is a spacer between the drive bearings and it should not be worn.

[Pete C]

The rod should be centred to the crankcase split line.
When assembled you should just be able to nudge the crank sideways each way with a click, then when definitively assembling make sure the cushdrive is tight and cannot come undone (Loctite blue better than tab washer!)
There is a spacer between the drive bearings and it should not be worn.

the spacer refered to should be 1 inch long

[neil1964]

The rod should be centred to the crankcase split line.
When assembled you should just be able to nudge the crank sideways each way with a click, then when definitively assembling make sure the cushdrive is tight and cannot come undone (Loctite blue better than tab washer!)
There is a spacer between the drive bearings and it should not be worn.

the spacer refered to should be 1 inch long

Thanks, did not have exact size to hand👍

[Mark Cook]

If your stuck,

https://pesltd.uk/?product=66-0660

Mark

[neil1964]

If your stuck,

https://pesltd.uk/?product=66-0660

Mark

They are expensive (cf dodgy pattern ones) but well made and probably indestructible. 
On a crank that you don't intend pulling apart again well worth it, IMO.
So I'm going to buy one for next build!