Weird question about bolts

[Hogfarmer10]

I have a loader tractor that the loader bracket bolts into the cast iron axle support and transmission housing. I can not keep these bolts tight! I have tried loctite. There is no way I can tack weld the bolts (due to clearance). Anybody got any good ideas how to keep them tight?

 

[chevytaHOE5674]

Nord-Lock washers.

 

[Dsth]

loctite has different strength ratings for different size bolts. Are you using the right strength? if lock washers don't fix the problem either, you can make thin metal plates with a bendable tab to bend over one of the flats on the bolt head. a flange headed bolt head may work also.

 

[WFfarm]

JB weld?

 

[chevytaHOE5674]

What size bolts and how tight are you torqueing them?

 

[Hogfarmer10]

3/4" bolts. 260 ft lbs + ( my small torque wrench maxes out at 260 and I can't get my big torque wrench in to the bolts). I used the loctite that does not require heat to break loose because I cannot use a torch due to bolt location. I had never heard of the nord lock washers. I ordered some today. Thank you. And thanks to all for the help.

 

[cfpinz]

It's likely your internal threads have worn due to the bolts loosening up and wiggling around. If the aforementioned washers don't do the job, I would pursue torqueing them as tight as I could and tacking the heads. If you can get a wrench/socket to the bolt head, I'd bet there's a way to get a welding rod in there.