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Case Tractors Discussion Forum
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730 gas comfort king

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Bill Gausman

12-23-2004 06:09:47




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Both heads on my 730 were cracked between the valve openings. I had them repaired(rebuilt)and the valves ground. Could someone tell me what to torque the head bolts to and in what sequence? Thanks Bill




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John Saeli

12-23-2004 10:21:21




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 Re: 730 gas comfort king in reply to Bill Gausman, 12-23-2004 06:09:47  
Hey Bill: Don't forget to re-torque the head after the initial warm-up. When you re-torque, CASE recomonds you back the bolt or nut off 90 degrees & come back up to torque, 1 at a time. Head welding is a lost art. The only Person I know of doing it is George from Maryland who lurks around this board from time to time.



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Roger H

12-23-2004 10:41:17




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 Re: 730 gas comfort king in reply to John Saeli, 12-23-2004 10:21:21  
Hey John, there is a place out here in Nevada Iowa that does a LOT of head welding, the original owners sold & the new owners built a new building west of town, it's BIG. They do excellent work.



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Bill Gausman

12-23-2004 15:38:22




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 Re: 730 gas comfort king in reply to Roger H, 12-23-2004 10:41:17  
Thanks for the good info. I had these heads rebuilt in Chapin Illinois. The guy that ground the valves said they did an excellent job. Bill



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Roger H

12-23-2004 07:39:02




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 Re: 730 gas comfort king in reply to Bill Gausman, 12-23-2004 06:09:47  
IF you have bolts, the torque is 145-150 ft lbs make absolutely sure the holes in the block where the bolts screw into are CLEAN, and the bolt threads also, otherwise the readings are no good & oil the threads too before putting the bolts in the holes. When I torque a head down, I go to 50 ft lbs first, then 100, then end up at 150 to finish up. If by chance you have studs sticking up out of the block that you would put a flat washer & a nut on, those only torque to 100ft lbs since they are fine thread instead of coarse thread that the bolts have.

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Roger H

12-23-2004 07:51:00




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 Re: 730 gas comfort king in reply to Roger H, 12-23-2004 07:39:02  
Bill, I forgot to mention when I start torquing a head, when I go around at 50 ft lbs, I do it a couple times at that setting, Why ?... When you torque yours down go back around at 50 again & see how many of the center ones where you started are completely loose, bring them back up to 50 ft lbs again before going on to 100, you may need to do this at 100 also but it wont be as bad as at 50 since you are getting the gasket compressed more & more up to a point where it wont compress much more. If I have you totally confused, write back & I'll try to explain better.

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JGarner

12-23-2004 07:24:55




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 Re: 730 gas comfort king in reply to Bill Gausman, 12-23-2004 06:09:47  
Have you questioned your local Case dealer? Failing that and no response here, sequence is critical but a good rule of thumb is ALWAYS work from the centsr out and diagonally from side to side until all have been tightened. As for touque, I would go to my local Dodge truck dealer and ask their Repair Shop Manager what the torque is on the head bolts for their Cummins diesel, this should be pretty close to Case specs.

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