Posted by tlock0031 on October 06, 2012 at 16:20:17 from (166.147.104.16):
i have a 500A backhoe with what i believe is the original cbc 431-7AL pump. i bought service manual 2048 because i knew at the least the pump would need completely dissembled and cleaned, and i was right, it was stuck and filled with dry rust. however, two things have become an issue, the drive shaft is sheared in two and i can not get the rotor gear assembly off. None the that will matter unless i can come up with a replacement drive shaft. My overall question is kind of a two parter.
1. the drive shaft does not look all that complicated, so i am thinking i can machine one out, without it i can't even use it as a core and the only others i have found would be replacements with no core for around 1600 bucks.
2. would going to one of the later model pumps - DB or JDB, be a better choice? change out the pump, injectors and lines? i think i found a 3020 diesel with everything there, so maybe rebuilding that pump and installing the rest would be a cheaper way to go.
Any thoughts from anybody with experience on these models would be great. At least these CBC's were used on a lot of tractors, not just deere, so maybe my odds of finding a complete one in better shape than mine would be possible
I have read a lot of posts on here and on jdcrawlers forum and i know there are a number of knowledgeable members, but no questions quite like mine. feel free to email me as well.
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