NH 1720 Anti freeze leak

[alan40]

My 1720 has been leaking anti freeze from a plug? behind the fuel filter and by the oil filter. What is that plug called? I have the service manual but can't find it any were in it. It's starting to leak a little more and should proberly replace it before starting alot of brush hogging.
I have seen this topic before but my search yielded no results.
Thanks in advance. /forums/images/graemlins/grin.gif

 

[RickB]

It is the block drain fitting. Should be a bunch of archived info. Also prevalent in 1920's and Class II and III TC's.

 

[Boomerbrent]

I replaced the one on my 1925 last winter. The fitting is quite inexpensive, but I needed to buy crow foot wrenches to remove the old one and install the new one. I believe it is 1 1/16 inch size. Even after replacing the fitting, I still had a small leak,and added a bars leak tablet to the new 50/50 anti freeze mix. So far, have not had any more problems.