Posted by JRSutton on January 21, 2016 at 14:30:24 from (71.184.82.47):
In Reply to: Model A rod troubles posted by Split Shot on January 21, 2016 at 10:42:09:
Your A probably has babbit bearings - NOT the more modern shells.
You essentially have three choices;
re-grind the crank and re-pour the bearing.
Re-grind the crank and have the rods machined to accept modern shell type bearings
or - just carefully adjust the caps by removing shims.
This may go with out saying - but especially for option 3 make sure the caps go back on exactly how you took them off.
What's very likely on that machine is the fly wheel has walked out a little on the crank shaft. The whole crank should meet a certain spec for side to side motion (moving the flywheel in and out) Try it -if you can feel it, you can probably guess if it needs to be adjusted - very common on the JDs.
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