Farmall H connecting rod alignment

c brown

Member
im putting together a farmall h engine with my shop class, we are going through the manual and the section with connecting rods states that connecting rods need to be aligned, my question is how to i check proper alignment to not have them cocked
 
Rods are checked for center to center alignment on a "fixture device". An automotive machine shop would have one. It is not expensive to have them checked. If they need to be corrected, its a little more money. Sometimes the are honed, bushed, or bored back to specs.
Regards,
Charlie
 
when you say center to center, what exactly do you mean what all needs to go to machine shop? we are in Southern NJ where abouts are you
 
also i have another question, the old pistons in the tractor had a step in them, the new ones are flat top and symetrical except for one small notch on top of piston what way does that go appears to be fornt or rear, or also the stamping on the piston can face manifold or cam shaft size?
 
It would be best for you to post a picture of both an old piston and a new one to tell you about the step and notch. I don't want to give you the wrong information, unless the "notch" is for valve relief, I would say it would go forward. As to the numbers, I would say towards the cam side. Better check that with someone who knows there.
Regards,
Charlie
 
how imperative is the alignment, i called a machine shop and they basically told me not to worry about it unless engine suffere major damage? Do alot of guys actually get this checked when yhey do rebuilds?
 
Take his advice. The H motors isn't a high speed engine, and unless it was stuck and someone pounded the pistons out, I would say just put 'em back. But, depends on your level of perfection, and your wallet.
When I install a rod and piston, I always turn the crank with a wrench, by hand, and feel for any binding, do it for each piston. Can also check the piston height with a dial indicator on a mount, to see if any are "short".
 
I'm in Cape May. I have used Bridgeton Spring's machine shop several times. They are pretty good, give them a call too.
Regards,
Charlie
 
If the engine didn't have stuck pistons with the rods pounded on when removing them. Also if the piston skirts and bearings look normal on how they normaly wear if okay. I wouldn't worry to much about the rods in stock low speed H engine. Unless new piston pin bushings are put in out of square. If having a machine shop install the bushings you may as well have the rods checked. After cleaning the rods up its not a bad idea to bolt the caps on and torque the bolts and check the big end size without bearings. Also check the pin bushing size and out of round if reusing. My 2 cents.
 

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