Farmall H bottomed out

Anonymous-0 · Jul 14, 2008

my farmall H is stuck for many years i guess but im workin on it to get it unstuck before pushing it in shop this winter , 1 pistion tight as !@#$ drove it to bottom with block of wood now cant get past bottom to come back up the sleeve .now what.

Bob Kerr · Jul 14, 2008

I did the same thing on my 1928 Chevy grain truck I am working on. I have tried everything and it is tight as heck. I haven"t done it yet, but the last thing I can do is to heat the cyl walls hot to expand the cyl and then use a can of 134A refrigerant to freeze and shrink the piston. I bought a cheap can with an disposabble adapter and will cut off the hose fitting so it will shoot liquid in the bottom of the piston skirt. I tried Ice but couldn"t get it cold enough and can"t get Dry Ice anywhere around here. If you can get liquid propane to shoot in the piston it should work too. You have to remember the cyl walls are usually smaller at the bottom of the bores since most wear happens up top. Mine had been rebuilt .020 over right berore it was parked around WW2 so it was snug to start with.

mkirsch · Jul 14, 2008

Remove oil pan. Remove rod cap for that piston. Drive back up through with an oak dowel.

Mike Farmer · Jul 14, 2008

If you already have the conrod bearing off check if you have driven it down so far that the bottom piston ring is out of cylinder. If so you will probably have to break the ring off for it to re-enter the bore. Plenty of oil, block of hard wood and a big hammer and it should move fairly easily. Yep I know there are exceptions. MTF

El Toro · Jul 14, 2008

I drove them out on a Farmall A back in 1975 before any of this restoring ever started. The sleeves even came out on 2 of them. I was able to use all of the rods on the new pistons. I pulled the engine since the block was full of sludge and was easier to work on. Hal

ScottyHOMeY · Jul 14, 2008

Good point, Mike! I cautioned somebody about that just the other day, who is hopin' to be able to re-ring or re-sleeve in-frame.

In general, I don't believe drivin' a piston down is a good idea unless the cap is still on the rod to prevent just what you describe about a ring expanding once it pops out the bottom of the sleeve.

If you've got just one piston stuck, you might be able to free it up by beatin' from the top. And you might even get by with it if you've got two stuck, but only if they're not stuck too hard. But if one or more is stuck or either one is stuck hard, poppin' the rod cap off and beatin' upward is about the only way to go.

Even at that it could get into drivin' piston, sleeve, rod and all out as a unit, and cuttin' away the sleeve to get the rod back. BTDT, but on a 113. Not sure if those dry sleeves are as prone to poppin' out with a beatin' as wet sleeves, and the heating and cooling that others mentioned wmight wind up bein' what does the trick.

But, fer sure, drivin out the bottom with the crank in ain't gonna work!

Anonymous-0 · Jul 14, 2008

THANKS FOR THE INPUT GUYS, its appreciated.

Farmall H bottomed out

Anonymous-0

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Bob Kerr

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mkirsch

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Mike Farmer

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El Toro

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ScottyHOMeY

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Anonymous-0

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