Flywheel index mark on 955

Mechanos · Jan 2, 2012

I'm trying to check/adjust the valve lash on my 955. I can see the TDC marks on the flywheel just fine, but I can't seem to locate the index mark on the flywheel plate. I'm hoping someone here can help out with where the index mark is supposed to be.

beenthere · Jan 3, 2012

Mechanos
Will this thread help you with your question?

http://www.tractorbynet.com/forums/...ating/183025-42-43-4400-valve-adjustment.html

joecdeere · Jan 3, 2012

see if this helps - from the Deere CTM-3 engine manual for the 955 engine

Mechanos · Jan 3, 2012

I have the manual and that doesn't help at bit... but thanks anyway.

The thread that beenthere posted has a link to an excerpt from a different manual that provided me some clues. The pictures posted in the linked thread also provided me some clues.

The problem is... my engine doesn't look like any of these pictures or drawings in the manuals. There is no inpsection hole... but I believe I've identified what they are intending to be used as the index mark pointer. The manual from the 955 is for the 3TN84 (which is what my tractor is supposed to have in it) and the linked thread is for a 3TN75. The engine in my tractor is neither... it's a 3TNE88. Another factor is that it's not even a "John Deere" Yanmar... it's a Yanmar that's been sourced from some other application.

I believe the 4410 used the 3TNE88, so I suppose I should have asked for information on the index mark on a 4410. It appears that regardless of the type of inspection hole, pointer, index mark, whatever... the TDC marks line up at would be the 3 o'clock position when viewing the flywheel from the operator's seat.

joecdeere · Jan 4, 2012

well for what it's worth, here's the 3tne88 out of a 4410 manual

Mechanos · Jan 4, 2012

Thanks... but it looks like that's not much help afterall. I appreciate the effort though.

Doing a little more research and I've found out that my 3TNE88 has the 3TN84 mounting plate and flywheel shroud so it will mount in the 955. What I don't know is if my setup is using the 3TNE88 flywheel or if it has the 3TN84 flywheel mounted on it. If I could find a part number on it I could look it up and confirm.