Still more help needed...

I was running my 212 9T441 grader in the shop today, (D311 engine) after shutting it down, I went to open the compression release for the next time. It seems it is stuck in the run position. I pulled the valve cover off, everything appears to be as it should, yet, it still will not shift to release. Looking through the manuals, I can see how to remove and replace the linkage and rod under the valve cover, but I don't want to go that far if not needed. I also do not want to use too much force as I tend to break things. Could I have "over extended" the linkage into the run position?

What might I be missing.

Check the ball and spring in the rocker shaft support housing.
Gary

[quote="Rome K/G"]Check the ball and spring in the rocker shaft support housing.
Gary[/quote]

That was the exact problem; somehow the cam and shaft had rotated beyond the normal location and slipped towards the radiator end. I suspect that the shaft had slipped over the years. The cam was still engaging it’s keyway, but not completely. It took about an hour last night looking and thinking, but this morning it all went back together in about two hours.

All is well now, thanks for the advice.

Your welcome, glad it all worked out.
Gary