Need specs on 850 4x4 tractor valve adjustment

[m5040]

I just bought a 850 4x4 (later model) tractor and would like to check the valve adjustment. Can anyone let me know the adjustment procedure? I read .008 each but no mention of engine hot or cold. Some list .008 intake and .006 exhaust which to me is backward.

Anyone help on this? S/N 24406

 

[bmaverick]

I just bought a 850 4x4 (later model) tractor and would like to check the valve adjustment. Can anyone let me know the adjustment procedure? I read .008 each but no mention of engine hot or cold. Some list .008 intake and .006 exhaust which to me is backward.

Anyone help on this? S/N 24406

Your JD850 has the same engine as my Yanmar YM2610.

Did you look all of this up in the Deere TM1192 Technical Service Manual yet?

 

[m5040]

I did look it up and could find nothing complete. What I found listed .008 clearance but let it open as to what temp the engine should be at. I guess John Deere must not know what Yanmar required and left it out.
I will probably adjust to -008 hot, as it will only increase when cold. Can't go wrong. But it would be nice if someone could document it for everyone at least on this forum.

 

[Barry 1]

Service manual(TM1192) say to check every 600 hours when cold. .008 for both Look on page 20-05-1

 

[m5040]

I just bought the tractor and don't have a manual. I figured that the valve adj was neglected and wanted to get it done. Not sure if I will keep the tractor or not. Thanks for clearing that up on the correct engine temp for the .008 clearance adj.

 

[rScotty]

Setting them cold is the norm. If you are curious, check them warm too. I think you will be surprised at how little they change.