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Case Tractors Discussion Forum

Case 995 with broken crankshaft

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fuzzy31

08-21-2006 03:45:18

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I have a 1978 Case-David Brown that 2 years ago broke crank at 45 degree angle in # 1 rod it was running 900 RPM's at the time.I had it rebuilt with new crank ,pistons all valves and seats,now 2 years later and 206 hours while brushhoging last night at 1300 rpms the new crank broke at the back edge of # 1 rod again .Any ideas,could the balancer be bad somehow and be the cause.thanks for your time

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jal-SD

08-21-2006 06:17:12

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Re: Case 995 with broken crankshaft in reply to fuzzy31, 08-21-2006 03:45:18

Did you use the old rods? I'd bet that you have a bent rod, the block needs to be line-bored, or you have a cracked main journal someplace adjacent to the #1 throw. (My $0.02 worth. jal-SD)

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Elmer

08-21-2006 18:47:28

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Re: Case 995 with broken crankshaft in reply to jal-SD, 08-21-2006 06:17:12

Line bore could be a problem. When i replace a crank in a DB i look for a used DB crank. I think the new CaseIH supplied and aftermarket cranks are giving a problem!

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