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jdemaris
01-03-2004 18:27:31
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Re: No hot fluid now but no lift jd450 in reply to John Tilson, 01-03-2004 13:49:31
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The relief valves in the 450 control valve come apart easily unlike a lot of newer machines that use nonservicible cartridges. I suspect, though, that you blew the spider-gaskets in the pump -or worse. From what happened, I'm suprised you didn't blow the pump center housing in half. It used to be a common occurence (at least common to a Deere mechanic). The new center-housing used to be available as a separate part, but not anymore. In fact, I've got a brand new pump from a 450 crawler loader that, basically, has never been used. Years ago, a guy did just what you did, but blew his pump. Without realizing what the problem was, he came down to the dealership, bought a new pump, put it on, and instantly blew it upon starting the engine. I've had it sitting on my shelf for years, hoping I'd find a good center-housing for it. Anyway, back to your pump. Probably a Cessna? Early on,Deere used a few cast-iron Webster-Electric Co. pumps, but after that only used Cessna aluminum pumps. Simple to get off and pull apart - but you cannot buy major parts for it. You CAN buy the seal, wear plate, and gasket kit. If your're lucky, that's all you need. If you eyeball the pump, try to see if the oil seal on the imput shaft pushed out or if it's leaking now. If it is pushed out, that shows it exceeded it's pressure rating. Subsequently, if you pull it apart the spider gaskets may be blown (which can be fixed easily) or the center housing got chewed out (which you won't fix). If the pump is the problem, and you don't think it's repairable, there are lots of other pumps that will fit right on. Many places, like the following sell them: Link As I recall, the 450 loader uses a 23 gallon per minute pump and the dozer uses a 13 gallon per minute.
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