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Farmall & IHC Tractors Discussion Forum
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torque and torque pattern for head bolts on IH 240

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hbf4

10-03-2005 16:16:56




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What is the torque and torque pattern on the head bolts on a IH 240 tractor?




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K.B.-826

10-03-2005 19:32:36




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 Re: torque and torque pattern for head bolts on IH in reply to hbf4, 10-03-2005 16:16:56  
I agree with what El Toro said, except for one thing- Instead of torquing the bolts in steps increasing 10-15 ft/lbs each time, torque them in three steps, first to 30, then to 60, then to 90.

The problem with only increasing 10-15 pounds each step is that it takes "breakaway torque" to get the bolt turning. If you only try to increase 10 pounds each time, your torque wrench may click before the bolt even starts moving, fooling you into thinking that the bolt is tighter than it really is.

Same thing applies to the "bending beam" torque wrench.

No matter which type of torque wrench you"re using, make sure the bolt is turning as the wrench hits the spec you"re going for.

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El Toro

10-03-2005 17:56:18




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 Re: torque and torque pattern for head bolts on IH in reply to hbf4, 10-03-2005 16:16:56  
The torque is 80 to 90 ft-lbs. Start in the center of the head and tighten the bolts equally in both directions until snug. Then use your torque wrench and start at 25 ft-lbs and use the
same procedure starting in the center. Then increase the torque to 35-40 ft-lbs and use the same procedure, then keep increasing every 10 to 15 ft-lbs until you reach the max. Some gasket manufactures recommend retorqing after the engine is heated up. Probably is a good idea and recheck
your valve clearances too. Hal

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