Posted by fireballv82003 on November 30, 2014 at 08:17:52 from (174.131.245.69):
Hey everyone,
I am getting ready to have the rods / rod bearings done for my T20 crawler.
I am using undersized bearings and having their ID turned just enough to fit my crank.
I need some info for my machinist about shim packs for the T20 - F20 (same engine)
I looked on another old tractor site. A guy said his old federal mogul manual says each bearing requires two - 0.050 shims and two - 0.031 laminated shims.......a total of 0.131"......on each bolt. I copied this post from that site at the bottom of this post.
I got two NOS shim packs from a guy and they measured 0.131".
Another guy said shims needed to be only 0.031.
With 0.131 shim packs on the two used bearings, the caps crush the bearing and shims about right. On the new, unfitted NOS bearings, the caps don't crush the shims.....because I have not filed the bearing protrude 0.005 past rod half?? Am I thinking right?
*******HELP!, Does anyone have thant that old Federal Mogul manual? ****** or know who earl from illinois that posts here on the YT site.?
The IHC manuals (I have them ALL) don't mention this. Not even the repairmen's manual for the powerplant. Looks like these manuals were written by 7 year olds with really good drawing capabilities, but not much mechanical knowledge.....haha lots of pictures but not many detailed instructions one might need. Maybe everyone knew how to do this back then and I am the dumb one.
Below is post from YT - this guy had no email address, Earl from Illinois.
My old Federal Mogul bearing manual say each rod brg. requires a shim pack of which is made up of 4-.050 shim and 2- .031 shim laminated. That would give you .131 on each rod bolt.
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