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Case Tractors Discussion Forum
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DC Case cylinder head.

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tractornutjd

12-15-2007 19:59:50




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Hello. I have a DC Case with a cylinder head that has a casting number of A5576A. Which head is this? My parts book doesn't detail. Also can I use domed 4 1/16 pistons with this head? Thanks in advance.




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mEl

12-17-2007 03:48:31




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 Re: DC Case cylinder head. in reply to tractornutjd, 12-15-2007 19:59:50  
L If i were in your position I would take the two high pistons and compare the compression height to the other ones that are right , determine if there is sufficient meat in the piston crown and put them in a lathe and correct the pin height to the ones that are right. We do this routinely when building pulling engines. Ideally, if you had 4 new pistons and allowed for head gasket crush and allowed .060 for clearance after everything was down tite you could gain a couple horsepower, just someting to think about !!!

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mEl

12-16-2007 04:24:01




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 Re: DC Case cylinder head. in reply to tractornutjd, 12-15-2007 19:59:50  
Gentelmen, would it be possible for you to post the piston pictures and the compression height of the pistons you are talking about. The old M&W style top will definately work without bumping the 5505 but the compression requires a bit more than lo test, my 39 Dc would ping on the fuels available in the 60's on a 3 bottom plow, it would handle the 3-14 plow easily in 3rd gear in corn stubble, a bit harder in tough sod, sometimes requiring downshift to 2nd. The M&W popup - 5505 combo gave 52 hp at rated pto speed. mEl

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L.Lamp

12-15-2007 20:41:11




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 Re: DC Case cylinder head. in reply to tractornutjd, 12-15-2007 19:59:50  
The 5576A head is the all fuel head. The 5505A head is the high compression head. I have asked if the 4 1/16" dome pistons will work with the 5505A head but did not receive an answer from the people selling these sets. The domed pistons will probably work with the 5576A head since there is a releif in the head as big as the piston bore. If the dome piston at the outside edge is flush with the top of the block at TDC they will probably hit the 5505A head. I have a new set of flat tops that stick up above the block .110. These will not work with the 5505A head, but will work with the 5576A head.

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L.Lamp

12-16-2007 14:55:22




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 Re: DC Case cylinder head. in reply to L.Lamp, 12-15-2007 20:41:11  
I have a '50 DC block that I changed all the parts from a '46 that had been rebuilt and left to freeze up cracking the block big time. Two of the pistons I could not save so I got 2 CaseIH 4" pistons to match the two good ones. After putting in the pistons I discovered they did not come to the top of the block, lacking about 1/8". I didn't want to leave it that way and purchased a new sleeve set at a sale. I changed the #1 piston and rolled it to TDC and it sticks up .110 above the block making it impossible to use my rebuilt 5505A head. I have no choice but to put the head on with the below deck piston. Both piston sets are 4" aluminum Case parts. What gives?

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