flywheel bolt torque

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flywheel bolt torque

Post  BUZZ BUZZARD on November 23rd 2012, 11:52 am

This had nothing to do with a bbf or race car just trying to slip this in. Can anyone out there give me the torque specs on the flywheel bolts on a 1970 john deere 3020 diesel tractor. I have looking for the specs for the last 4 hours. I am trying to get my dads old tractor put back together before monday and there is no one out hear that can get me the infor the jd dealer and all the local tractor shops are closed til next week. Sorry for the non 460 tread but I hoped that one of the members may have the info. Thanks!

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Re: flywheel bolt torque

Post  bbf-falcon on November 23rd 2012, 12:37 pm

On something like that I usually find the diameter of the bolt and what type and see how much it can be torqued before it's overtorqued. Google it Smile

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Re: flywheel bolt torque

Post  Curt on November 23rd 2012, 4:12 pm

It's a one mississippi, two mississippi with an impact isn't it? Very Happy
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Re: flywheel bolt torque

Post  whitefield on November 23rd 2012, 5:35 pm

85 ft lbs.
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Re: flywheel bolt torque

Post  BUZZ BUZZARD on November 23rd 2012, 6:58 pm

Got a hold to my old votech instructor, another vote for 85 ftlbs. 85 it is!

Thanks!

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Re: flywheel bolt torque

Post  IDIeselman on November 23rd 2012, 7:38 pm

Everything I find says 85-90 lbs....with new bolts. Laughing
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Re: flywheel bolt torque

Post  Gregaust on November 25th 2012, 5:29 am

What bolt diameter and thread size , tells you exactly what is required

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Re: flywheel bolt torque

Post  BUZZ BUZZARD on November 25th 2012, 10:46 am

1/2 inch course, grade 5, tractor is back together now torqued at 85. Thanks for the info.

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Re: flywheel bolt torque

Post  Dave De on November 26th 2012, 1:47 pm

BUZZ BUZZARD wrote:1/2 inch course, grade 5, tractor is back together now torqued at 85. Thanks for the info.

My chart says 55 ft-lbs for a Grade 5, 1/2-13 thread with lube, dry torque is 75 ft-lbs.
Are you sure they are corse thread?
Fine thread 1/2-20 is 65 ft-lbs with lube and 90 dry

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Re: flywheel bolt torque

Post  bbf-falcon on November 26th 2012, 7:17 pm

Don't think too much into this guy's,its a tractor not a TF Funny car Rolling Eyes

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Re: flywheel bolt torque

Post  whatbumper on November 26th 2012, 9:26 pm

We usually put a little ass into it. Too much ass will break it. Lol

To be honest I am a big guy so I usually just use a regular 1/2 inch drive rachet and go as tight as I can.

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Re: flywheel bolt torque

Post  BUZZ BUZZARD on November 27th 2012, 9:48 am

Thats the thing with charts I found three different ones with three different values. I agree with falcon it aint no top fuel motor as long as the bolts are not grossly over or under torqued it should be fine. Yes they were course thread unlike most flyweel bolts we see.

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