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Ford 9N, 2N & 8N Discussion Forum
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oil pump bolts

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lha

05-13-2020 10:44:36




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Does anyone know the torque for the oil pump bolts? The nearest I could find was 4.7 ft lbs. I appreciate any help I can get. Thanks in advance.




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lha

05-20-2020 16:10:45




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 Re: oil pump bolts in reply to lha, 05-13-2020 10:44:36  
Quoting Removed, click Modern View to see I went through three sets of bolts and finally got it right. At the point that I can feel it snapping,I back off. Thanks.



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lha

05-15-2020 22:41:10




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 Re: oil pump bolts in reply to lha, 05-13-2020 10:44:36  
Quoting Removed, click Modern View to see Thanks for the advice.



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HFJ

05-15-2020 22:20:32




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 Re: oil pump bolts in reply to lha, 05-13-2020 10:44:36  
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i like to tighten them till something snaps, and then back it off a half a turn :) :idea:



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lha

05-15-2020 19:18:32




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 Re: oil pump bolts in reply to lha, 05-13-2020 10:44:36  
Quoting Removed, click Modern View to seeNew grade 8 bolts torqued at 10 which is 8-10. I have been working on engines for over 50 years,but only 17 years on this tractor,so don't know everything,so asked.



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lha

05-15-2020 19:13:19




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 Re: oil pump bolts in reply to lha, 05-13-2020 10:44:36  
Quoting Removed, click Modern View to see



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jimtrs

05-15-2020 10:54:51




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 Re: oil pump bolts in reply to lha, 05-13-2020 10:44:36  
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Assume you're talking about the three oil pump cover to body bolts. These s/b 1/4-20 x 5/8.

Be careful looking up data and just winging it. You still torqued them too high. Probably not a big deal as most smaller bolts get tightened too much most of the time, and they usually take it OK. I just wouldn't do it in such a critical spot.

To use a torque spec, be sure to identify the bolts correctly. I can't image in any way these would be a grade 8. I'd worry about stripping out the threaded holes in the body or stretching the bolt itself.

My torque charts shows 1/4-20 cap screws in a grade 5 to be 6.3 - 7.3 ft lbs, and in a grade 8 to be 9 - 10 ft lbs.

TOH had it right, just snug them up good.

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TheOldHokie

05-13-2020 17:35:46




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 Re: oil pump bolts in reply to lha, 05-13-2020 10:44:36  
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I hope you understand how to extrapolate cross sectional area of a round fastener....

Really, just snug them up with a short wrench and forget torque. :idea:

TOH



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lha

05-15-2020 09:25:16




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 Re: oil pump bolts in reply to TheOldHokie, 05-13-2020 17:35:46  
I found torque recommendations from several suppliers and for grade 8 bolts,from 7 lbs to 11 lbs was recommended. I set them at 10 and tied them with safety wire.



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Jim L WA

05-13-2020 13:06:40




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 Re: oil pump bolts in reply to lha, 05-13-2020 10:44:36  
I don't know how much help this will be, but over in the left column on this site is an area for Research & Info. In there, is Torque Values. It's broken down into the grade and size of bolt. B.T.W. nothing is listed for as little as 4.7 ft/lbs.



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lha

05-13-2020 14:36:09




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 Re: oil pump bolts in reply to Jim L WA, 05-13-2020 13:06:40  
It shows 27lb for 5/15",but doesn't list 1/4",so I'll extrapolate the difference from 5/16 and 3/8". Thanks.



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