KWRB
Bronze Member
I am cleaning off the transmission housing of my dad's C, preparing it for the first coat of paint. I realized I have not removed the transmission drain plug yet, and that maybe I should. It has a square recess, so I try both the 3/8 and 1/2 drive socket wrenches and no luck. I appears the square recess in this plug is 7/16". I was able to find a socket online with a 7/16" male square on it, but I was curious about the plug itself and I wanted to see if I could tell the thread size before removal by knowing the countersunk square size, so I started doing some research. So far, dead ends.
Initially, I was going to make a tool out of a 1/2" ratchet extension, but then I found these 11 Piece 3/8" Drive Pipe Plug Socket Set which tell me that indeed there are different sizes. Otherwise, there wouldn't be tools, right? So then I go looking for pipe plugs with square recesses online and I can't find anything with a square size other than 3/8" and 1/2". So, I try looking for a standard.
I have a 26th edition machinery's handbook, which is usually a pretty good resource and I cannot find anything about pipe plugs in it anywhere. I also own an old machinery's handbook from 1951, which is about the year of the tractor. I was able to find a table of pipe plug dimensions, but like everything online, it only shows 3/8" and 1/2" pipe plugs.
Is it possible that there's some homemade plug in my tractor? That wouldn't explain why there are production bits available. If it's not homemade, where could I buy a replacement plug? There must be a an old standard for dimensions. Does anyone have it?
Thanks for any insight.
Kurt
Initially, I was going to make a tool out of a 1/2" ratchet extension, but then I found these 11 Piece 3/8" Drive Pipe Plug Socket Set which tell me that indeed there are different sizes. Otherwise, there wouldn't be tools, right? So then I go looking for pipe plugs with square recesses online and I can't find anything with a square size other than 3/8" and 1/2". So, I try looking for a standard.
I have a 26th edition machinery's handbook, which is usually a pretty good resource and I cannot find anything about pipe plugs in it anywhere. I also own an old machinery's handbook from 1951, which is about the year of the tractor. I was able to find a table of pipe plug dimensions, but like everything online, it only shows 3/8" and 1/2" pipe plugs.
Is it possible that there's some homemade plug in my tractor? That wouldn't explain why there are production bits available. If it's not homemade, where could I buy a replacement plug? There must be a an old standard for dimensions. Does anyone have it?
Thanks for any insight.
Kurt