Head torque spec

KenL · Jul 5, 2015

I still haven't been able to find my owners manual for my 10-20 that I put where I knew it wouldn't get lost. Looking for the head torque spec. Don't know if they were different through the years but this one is a 38. I have the service manual for a very early one but that doesn't tell me what I need to know. It does tell me the rocker arm clearance though. It says 8 to 12 thousands or the thickness of 3 to 4 normal sheets of paper. Had to read that twice to make sure I read it right. Thanks for your help.

BruceS · Jul 6, 2015

Based on my experience with F20s and 30s, I would say 80-90 ft. lbs. torque. You wont find any torque specs published for these tractors. They go by bolt size. Did you replace the head gasket??
As for valve clearance, 8-12 thousands seems awfully tight to me. My 20s and 30 are set at .018. Just my .02.

James Williams · Jul 6, 2015

Kent,If you have tightened any bolts you can usually feel how tight is tight.Torque wrenches weren't found and the factory I was told,Your pushrods need to be loose,8-10 is to tight,it should be more like 17-20.always recheck after running,the 10-20 were prone to get dirt in the lifters after removing the head.

jimmy

KenL · Jul 6, 2015

Thanks very much for your replies. I will take your advice and set accordingly. Yes, I will be replacing the head gasket. Thanks for your help.

Owen Aaland · Jul 6, 2015

You should be able to download a copy of the manual here.

Old tractor literature

KenL · Jul 7, 2015

Thank you. I ordered another manual yesterday so the one I have and can't find should show up in about a week.

Head torque spec

KenL

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