Flywheel Crankshaft Balance on model D.

The machinist is pretty fussy. He would prefer to check the balance after he builds up and machines my very out-of-round throws.

I think a can do a crude balance test by assembling the crank and flywheel on the tractor and spinning the combination with a 1/4 hp electric motor using a v-belt {without the conn. rods connected}.

Your thoughts..... ..... .....

Thanks in advance!
Jon

The flywheel is indeed out of balance and heavy on one side, but thats to counterbalance the also out of balance clutch driver disk. Those 2 heavy sides (flywheel and cluth disk) must be installed 180 degrees opposite from each other or you get bad vibration. That offest counterbalance action helps reduce vibration similar to the out of balance countershafts instaled in newer smaller cars to keep them smooth.

Your questions answers therefore, are:

1) NO, the flywheel is not match balanced to the crankshaft. (its out of balance by itself)

2) You should be able to balance the lone crankshaft without the out of balance flywheel or out of balance (but 180 opposite from flywheel) clutch drive disk attached.

Im sure the other good ol boys and D men can confirm or correct this and we can all learn something.

Good Luck n God Bless

John T