140 Farnall

James Saunders · Apr 19, 2012

How do I set the points on my 140 Farmall. Do I have to set piston at tdc or bdc to set them or what? If anyone can help me I will owe you big.

Thanks, James

El Toro · Apr 19, 2012

You remove the distributor cap. Place the transmission in the highest gear. Then you rock the tractor until the rubbing block on your points are on the high point on one of the lobes.
Then use a feeler gauge and set the point gap.
Then apply some lube on the lobes where the rubbing block rides. You only need to set No1 piston to TDC on the compression stroke if you pulled the distributor off the engine and didn't note where the rotor was pointing.

You use a timing light to check your timing with engine at an idle. You connect the lead off the timing light to No1 sparkplug near the radiator and the power leads to your battery. Hal

SouthernFarmall · Apr 19, 2012

You don't have to find top dead center. Once you get the distributor cap, rotor, and breaker cover off, make sure that the rubbing block (the piece that touches the cam) is on the corner (high part) of the cam, so that the points are open. Adjust the breaker point directly above the cam by loosening the screw and sliding the point to the proper setting. Do not take the screw out! It is very hard to get back in. The gap between the points (when they are open) is supposed to be .020 inch. The feeler gauge should snugly fit between the points (without moving them). Remember to put grease on the rubbing block! I wore a rubbing block down to nothing once because I forgot to put the grease on it.

SF

James Saunders · Apr 21, 2012

Let me tell you what I have done so far. I replaced points,condenser,distributor cap,rotor button,coil and alternator and set points as you instructed me to do and still don't have much of a spark at the #1 plug. Do you have any idea where to go from here?
Thanks for the help, SF

SouthernFarmall · Apr 24, 2012

Many new condensers have been found to be bad right out of the box. You can try another new one. However, I would replace your plugs and plug wires if you haven't already. Gap the plugs at, if I remember correctly, .023". Make sure you have good connections on all your wires, too (including the ones at the distributor and coil). See where that gets you. If it still won't work, post back and we'll give you some more advice.

SF

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