[Farmall] stuck push rods

[Mike Sloane]

If it was my tractor, I would douse the rocker shaft assembly liberally 
with kerosene, ATF, or some other solvent, and start tapping on the 
rockers gently with a mallet to see if they break free. If they do break 
free, then you need to pour some oil over the whole mess.

Note that using solvent like this will run down and dilute your oil, so 
it would be a good idea to change the oil afterward.

Worst case, you would have to removed the whole rocker assembly, 
disassemble it, clean it up, and put it back together. If you are very 
careful to keep everything in exactly the right order when you put it 
back together, you shouldn't have all that much work to re-adjust the 
valves.)

But the other question is why the rockers would be frozen - it could be 
due to oil not getting up to the rocker shaft assembly because of a 
plugged oil line (or something). (been there, done that...)

Mike

On 8/12/2010 6:03 PM, William Ransom wrote:
> Just before I started asking about how to install the generator belt,
> I bought a starter and put it on the Farmall M. The starter cranks
> the engine all right, but I noticed that cranking the engine didn't
> seem to blow any air out the smokestack, and also closing the choke
> didn't affect the sound any. (I would expect that with the choke
> closed, the air going through the narrow openings in the carburetor
> would make a noticeable sound. I know it did when I closed the choke
> while coast-starting the tractor in 2004-2006.) Also, when I went to
> time the magneto after filing the points, I couldn't feel any air
> coming out the spark plug hole, so I couldn't tell whether it was on
> the compression or exhaust stroke. Because of all this, I thought
> there was likely some kind of problem with the valves, so I took the
> valve cover off. When I took the valve cover off, I found that all
> but one of the push rods seem to be stuck up, holding the valves
> open. Only one valve opened and closed as I! turned the fan. Do you
> have any suggestions for how to get them unstuck?
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