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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

case 450b transmission problem

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supertune

10-08-2007 20:49:25




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Just changed all oils and pressure washed dozer. It was working before doing this, now it will not move. Starts up, and the blade works perfect, but no movement. I did park on a slight incline. Would that matter. Appreciate any help.




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Roney McStotts

10-09-2007 02:05:58




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 Re: case 450b transmission problem in reply to supertune, 10-08-2007 20:49:25  
I had the same problem once, rebuilt the charge pump, which consisted of replaceing the seals and O rings. Do you have pressure on the transmission pressure gage. If not that is probably your problem. The seals leak and and gets air in the pump



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supertune

10-10-2007 19:19:44




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 Re: case 450b transmission problem in reply to Roney McStotts, 10-09-2007 02:05:58  
no pressure showing on the gauge. I will try the suggestion I got from everyone. Thanks for the help.



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marlowe

10-09-2007 13:32:49




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 Re: case 450b transmission problem in reply to Roney McStotts, 10-09-2007 02:05:58  
your charge pump lost prime [right front just a head of the oil filter] pull hose off fill with oil and replace should go



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steve n carol

10-10-2007 08:00:15




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 Re: case 450b transmission problem in reply to marlowe, 10-09-2007 13:32:49  

marlowe said: (quoted from post at 13:32:49 10/09/07) your charge pump lost prime [right front just a head of the oil filter] pull hose off fill with oil and replace should go
I'm with Marlowe on this one. I was told this by a CASE mechanic before I changed my tranny oil. He cautioned not to run the engine w/o priming the charge pump...sl

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marlowe

10-09-2007 13:34:55




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 Re: case 450b transmission problem in reply to marlowe, 10-09-2007 13:32:49  
one more thing are you sure you did not shift the hi-low in to nutral did that more then once DA



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