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Discussion Starter #1
My 1256 has developed an engine oil leak, and I could use a little advice. It seems that the oil is leaking from the 4 bolts that attach the engine to the tube frame. Is it possible to tighten the bolts too much and punch through the pan? I rebuilt the tractor about 5 years ago and haven't seen the leakage until this past year. I snugged-up the bolts in question yesterday and still seen a little leakage this morning. Any ideas?
 

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Are you sure that is where it is coming from? The mount bolts do not hold back oil. Most likely you just need a gasket set.

Jason
 

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My 1256 has developed an engine oil leak, and I could use a little advice. It seems that the oil is leaking from the 4 bolts that attach the engine to the tube frame. Is it possible to tighten the bolts too much and punch through the pan? I rebuilt the tractor about 5 years ago and haven't seen the leakage until this past year. I snugged-up the bolts in question yesterday and still seen a little leakage this morning. Any ideas?
?? Answer a few questions if you will;

A 1256 should have a TRA 12-D wisconsin, does yours?

If so, the bolts that hold it down do not penetrate the oil pan/bottom of the block, they are bolted through tabs that are molded into the sides of the block.

Have you checked your crank vent hose, it comes off the side of the block at the valve cover. It could be hanging loose and blowing a little oil. It should be stuffed into a hole on your intake just between the air cleaner and carburator.

check the bolts that hold your pulley guard in place on the engine. These do penetrate the block and will leak a little if loose.

Check the gasket/shim set on the crank bearing plate, see if one of the thin gaskets has pushed itself free.

Some ideas.

Matt
 

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Discussion Starter #4
The tractor has been sitting still in my barn all summer since I only use it to blow snow. I'll check for other sources of the leak as suggested. I dripped about a quart over 3 months, so it's a pretty good leak.
 
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