Allis Chalmers 1938 M crawler engine

[Harold J]

Need some help: I"m finally putting my 1938
Allis Chalmers M Crawler motor back together.
When using plastigage what is the tolerance for the Main and Rod bearings ? And on the Crank
their are slots on the maine bearing journals if I remember right they had a wool material in them?? what can I use to replace this
material ? Last what the length of the 3/4" bolts and 2 studs that hold the front hook /
radiator support to the engine and oil pan ?

Apprciate any help / take care and have a great
summer day Harold

 

[mark everett]

Main bearings should have a clearence of .001 to .003 thou according to my M service book,Rod end clearence .001 -.008 thou again according to service book.Radiator bolts 5/8x1-1/2 unc.Front hook bolts 3/4 x 4-1/4 unf qty 2 and 2 5/8x3-1/2.

 

[mark everett]

No wool used that i am aware of and i have rebuilt several U M engines

 

[Harold J]

HI Mark: Appreciate you getting back with me.
Did Allis Chalmers use anything in those slots
on the main bearing journals.

Take Care

Harold