[cjet69]

Here's some discussion on this subject. http://www.yesterdaystractor.com/jd/messages/280889.html
My IT manual say if the expansion plug in the block is not installed correctly it can reduce or cut off oil to the rockers. We also use a pre-oiler (pressure tank) to check oil supply before putting the oil pan and rocker cover on, this way we know we are getting oil before final install and startup.

 

[cjet69]

See if this works. http://www.ytmag.com/cgi-bin/viewit.cgi?bd=jd&th=280889 Also might want to buy a manual. It gives installation measurements for the rear plug that might be useful to you.
If this link doesn't work do a search " john deere M cam bearing installation "

 

[cjet69]

Thanks! The link worked.

I have a manual. I marked the page and left the manual with the machine shop twice now. Apparently they didn't use it and this engine is very critical with this cam bearing installation. I guess out of the tractor it goes again and then to another machine shop.
Wish me luck!

Thanks so much.

Hope that works.:goodl: