Rounded off drain plug

   / Rounded off drain plug #361  
My guess is that most tractor owners in the US change oil when it's hot and the hotter the better.

What shape plugs do most tractors have - tapered or straight?
 
   / Rounded off drain plug #362  
Most modern tractors are straight thread with o ring or washers of some sort to seal. Some still have a few tapered plugs here and there. Most gear boxes still use taper threads, and as you said , just need to know how tight is tight when servicing them, no need to have them gorilla tight. I usually drain my oils when the unit has set a while and oil has drained down and settled, just my preference.
 
   / Rounded off drain plug #363  
I drain mine when it's cold. My tractor is a '97 model.
 
   / Rounded off drain plug #364  
this is the only thing that should be used on a square drive drain plug. Cheap 1/4", 3/8", and 1/2" Square Box Wrenches photo8.jpg using vise grips, pliers, or pipe wrenches, or even open ended wrenches will eventually round off the square nut..
 
   / Rounded off drain plug #365  
They also have socket sets for square plugs.
 
   / Rounded off drain plug #368  
I also have several 8 point sockets for square plugs too. Most tool brands have them.
 
   / Rounded off drain plug #369  
I also have several 8 point sockets for square plugs too. Most tool brands have them.
I would not recommend 8 point sockets for square plugs, as they would have less contact points, and could strip the plug if a lot of pressure is needed to remove it.. Thanks for the link to the four point sockets though, they are very difficult to find at a decent price!..
 
   / Rounded off drain plug #370  
I've learned something today. If I ever ran across a square drive plug, I think a 3/8, 1/2, or 3/4 inch drive extension fit and I hoped they were all like that.
 

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