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Ford 9N 1939 Help needed

T

Troy Juniper

New User
I have a 1939 Ford 9N tractor who has been in the family for a while now. Due hard work done over 73 years the unit is very tired. Last week we lost the head gasket bringing it to an end.

Due to value I would like to do an inframe rebuild and continue to use the unit for light duty. My question is placement of cylinder sleeves. Is it something that can be done within the home shop with moderate mechanical skills?

Any advice you can offer would be greatly appreciated.

TJ
 
Sleeve replacement is easy. We had a special "T" chisel that we drove down on the inside of the thin sleeve to cut the sleeve until it could be lifted out. (We called them paper sleeves in those days). That "T" chisel lets you remove the sleeve without damaging the block.

When you get ready to put the new sleeves in, put them in the freezer for an hour or more, Then take them out and drop them in the cylinder holes before they can warm up. Be sure to get them all the way down, because when the sleeve warms up it can't be moved.

It is more difficult to get the valves properly adjusted by carefully grinding the ends of the valve stem - unless the lifters have been changed to an adjustable lifter as some time in the past. Not sure if you can buy the adjustable lifter or not yet, although it would make valve adjustment easier if you can find a set for a reasonable price.
 
As small and as simple as it is I would just go ahead and pull it down. My son and I pulled the engine on one of my 8N's, put the engine on a stand and tore the engine down in about 4 hours. Then you can take the block to a shop and have the valves done, sleeves replaced, grind the crank, fit the wrist pins and if needed face the flywheel. Then you can put it back together at home. It cost me about 1200 to do mine including a 12 volt conversion, axle pivot pin and bushing, new points, condenser, coil, cap rotor and wires. Complete rewiring, facing the flywheel and new clutch, pressure plate and trow out bearing, new gauges and adding an electric temp gauge.

The new bushing for the new pistons will require fitting.

Rick
 
Oh and don't forget to pack lite grease into the oil pump to help it prime.

And if you don't have the IO manual get one.

Rick
 
Do you know if the engine has ever been overhauled before? It originally had thin wall dry sleeves. It is possible that it has been bored and fitted with thick wall sleeves or been fitted with over sized pistons without sleeves.
 
Do you know if the engine has ever been overhauled before? It originally had thin wall dry sleeves. It is possible that it has been bored and fitted with thick wall sleeves or been fitted with over sized pistons without sleeves.
 
The beauty of the little Ford Ns is that they were made for horse farmers who didn't exactly have high tech wrenching skills.
You can absolutey do an inframe on one.
Your biggest challenge will be pulling the sleeves out and the new ones back in.
Or, even reaming the ring ridge and putting new rings in will help for a thousand hours or so.
Main bearings can easily be slipped in from underneath too.
Unless you have run the engine out of oil or had a catastrophic failure somewhere whatever you do to it will be an improvement.
Get you by till we vote this JA out of office.
Before I spent the $1500 for a proper rebuild on an N I would sell it and buy a newer tractor.
But $125 for rings, gaskets, rod and main bearings and a little wrenching I would do an inframe on one.
 

You CAN get the adjustable lifters and they are a great Improvement..
Get some DRY-ICE and chill those sleeves with that.

Slip the sleeves in ALL the way as Fast as you can...do NOT stop part way..!!

Now, IF the steering box and King-Pins are OK..!!

Ron..
 
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