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#1
04-18-2013, 09:52 PM
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Bolt torque
I put my new sleeve hitch on and then realized I didn't know the proper torque for the diff cover bolts. Looking in the service manual at the standard torque values shows about 45 ft lbs for grade 8 3/8 bolts. Is this what some of you guys are using? I'm talking about the 3 lower bolts that hold the lower hitch link. TIA
Dave 
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#2
04-18-2013, 10:40 PM
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just me but i dont think it would use the grade 8 bolt spec. The bolt will be able to handle the torque but it may put to much pull on the cast iron. I personaly would go by the grade 5 torque value of 33-37
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#3
04-18-2013, 10:55 PM
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Never torqued them, I just used a impact gun. Never had a problem.
__________________
Donovan: 62' Original-fenders 63' 100R-K-321a,lights,creeper,electric lift 149-original paint, tiller, three point, duals, ags 1811Custom -M18-18hp kohler magnum, power steering and hydraulic lift with Three point and sleeve hitch. ---------------------------------------------------- Attachments:three-QA 42inch,42inch blade,one-38inch cast end, QA 44inch deck Brinly 12inch plow, 2x cultivators and x2disc Brinly Tool bar cub10: 
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#4
04-19-2013, 09:18 AM
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torque values for rear dif. cover
About to ask the same question. Installed a rear hitch ball receiver plate that I bought on ebay,and found leaks of Hytran coming from around the bolts. Re tightened the bolts, and stripped at least one.Will pull it all apart,and check all the bolt holes. If any are stripped, I hope I can use Helicoils !? Otherwise I may have cracked the cast iron around the hole/s. Any insights, or advise? May not have time to do this till next week. Will report back when I know more.
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#5
04-19-2013, 09:35 AM
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Quote:
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Keep dragg'n em in. They're like orphans...they all need a place to call home.
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#6
04-19-2013, 09:41 AM
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Quote:
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1641, 1541, 682 with 18hp command engine and hydraulics from a 782. 1872 with a power angle blade.
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#7
04-19-2013, 11:40 AM
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The original bolts are 3/4" long and the lower hitch link is 1/4 thick so I used 1" long grade 8 bolts. According to the standard torque table in the service manual grade 8 bolts in cast iron should be torqued about 45 ft lbs, that is if I'm reading it right. I should think that in certain conditions such as plowing those bolts would be under tremendous stress and should be tightened properly. I was wondering what others have done in this area.
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#8
04-19-2013, 11:53 AM
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Grade 8 bolts were only used on the engine head of these machines best i remember. That said you can use them but like someone else posted i would only torque them to the grade 5 spec it may not sound like a lot torque but it will hold and its alot of work replacing a cracked housing! Been there done that.
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1782 smoker!!, 169 and parts 128 And a bunch of stuff that fits on the back of them LOL
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#10
04-19-2013, 12:00 PM
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I just tightening the bolts down till they are snug, but not loose as were they will come out.
__________________
Donovan: 62' Original-fenders 63' 100R-K-321a,lights,creeper,electric lift 149-original paint, tiller, three point, duals, ags 1811Custom -M18-18hp kohler magnum, power steering and hydraulic lift with Three point and sleeve hitch. ---------------------------------------------------- Attachments:three-QA 42inch,42inch blade,one-38inch cast end, QA 44inch deck Brinly 12inch plow, 2x cultivators and x2disc Brinly Tool bar cub10:
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