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Discussion Starter #1
I recently became the second owner on a 444 S# 969353J, which if I read the PDF right is a '74 model.
Well the head was blown and one of the head bolts snapped off clean with the block, tried some Blaster to loosen it and tired a chisel and hammer to try and tap it around.
Ended up center punching and easy out with no luck and started drilling with small drill bits and then larger until it is almost gone except for a tiny bit on one side,ie the hole is now oblong.
I'm hoping I can drill it out and put a helicoil in, any advice would be greatly appreciated.
I already tried to buy another Case this weekend an 448, told the wife were going to have to move, as our yard isnt big enough for the tractor I want to get!!!!!!!
Yes I will try to get tractor porn as oon as possible.
 

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I had a head stud snap off in my 8N I was rebuilding. I started up the same as you. Then I moved to a small dimond cutter in a Dremel tool, and played dentest for a wile. :D worked well. All I needed was to run a tap through it after.
 

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I've found that the left handed drill bits work better than the easy outs if you can still go up a size. Spray a lot of blaster or other penetrant in the hole and let it soak for a day or two before trying to remove it.
 

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Thanks guy's for your replys.
My middle son is a little iratated with my as he had some reverse drill bits on order from Mac Tools just for that, I just got jonesen to get it going! I'm sure mist can understand that.
You would think at 44 years old I would know better,LOL.
How about if I drill it out and put a stud in the hole and JB Weld it in place?
 

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Rob,

I think your choices are to get the bolt out and clean up the threads or drill it out and put in a helicoil. To do the latter you need to make sure the bolt ends up centered in the existing hole. If you aren't sure you may need to take it to a machine shop or risk ruining the block.

The guy who is an expert is Brian Miller, http://gardentractorpullingtips.com/index.htm, who rebuilds these engines so you may want to ask what he recommends.

To shift from one range to another you often have to move the tractor slightly so that the gears can mesh.
 

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Discussion Starter #7
Thanks Bart, kinda what I had thought,just throwing some ideas around but most likely will be a trip to the machine shop, I guess that means I can degrease and sand and paint in the mean time.
 

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Rob if you already drilled off center and through part of the bolt hole yes it would be a good idea to take the block to a machine shop. They will need to find the hole center. Run an end mill down it to clean out the rest of the bolt and recenter the hole (they could EDM it but most machine shops don't have an EDM). Then drill and tap it for an insert. Do yourself a favor and don't let them put a Helicoil in it, use a Jergens key locking repair insert. Maybe others have had different experiences but I find the Jergens inserts to be a far superior and more long term repair.
http://metalworking.mscdirect.com/CGI/MWSRCH?ns=1&scrNtt=jergens+key+locking+repair+insert&Ntk=Keyword+Search&x=18&y=7
I don't know if the link will work but you can find them at JL industrial supply
search for Jergens key locking repair insert. You can buy them in a kit or individually. The kit comes with 5 or 6 inserts and an installation tool which is just a driver to set the locking pins in place. I've installed them plenty of times without the install tool just carefully tap the locking pins down with a hammer. The kit is probably like 50-60 bucks and a single insert is probably less than 5 bucks (I don't know what size bolts the head bolts are). So for just one repair it doesn't make sense to buy a 50-60 dollar kit. The installation instructions are easy. 1) drill and tap for the external size of the insert 2) screw in the insert to just past flush of the hole, NOTE: if drilled and tapped properly it will just screw in with your fingers no tools necessary
3) use the installation tool and a hammer to drive the locking pins down flush or CAREFULLY drive the pins down with a hammer and no installation tool.
Hope it works out for ya, good luck.
 
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