• If you like antique engines, vintage tractors or old iron, please register and join us. When you register on Smokstak, give complete answers and fill in all blanks. Be Considerate, this is an application to JOIN Smokstak, therefore it becomes part of a decision to open the door to you or send you off to the dropout file. Place your City, State, Country in the location box and it will be compared to where the internet lookup utilities say that you are. Don't give me a zip code to look up, the Eject button is much easier. We get hundreds of applications, so there is not time for monkey business.

Help with Overcenter PTO Clutch (Rockford)


If this is in the wrong thread please tell me so it can be moved. General forum searches yielded no results.

Searching for a over center PTO disk clutch for my Lister Petter LT1 build 30 diesel, counter clockwise rotation hence posting in the marine section. The bell housing measured out to SAE #6 (11.25 inch) 8 bolt. The flywheel is were I run into trouble, I have a blank 1 inch PTO input shaft, 3 bolt pattern awaiting to be broached and stubbed for such a clutch.

Some vague information i can find is for the Lister Petter ST or TR marine engines with no real specs to use as a reference.


Attached is a photo of the Bell housing end of the engine. Any information will be greatly appreciated.