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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

backhoe problems 480 case

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stressfree

07-31-2005 03:14:47




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whats the problem when a different cly works when the other valve is pulled.like when i put my outrigger down the bucket starts to move.leakage in the valve? or if i have a hard pull the bucket dont hold.just resealed piston.




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george md

07-31-2005 12:16:47




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 Re: backhoe problems 480 case in reply to stressfree, 07-31-2005 03:14:47  
Rebuild the secondary relief valves on the back of the main control valves .

george



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stressfree

07-31-2005 17:25:09




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 Re: backhoe problems 480 case in reply to george md, 07-31-2005 12:16:47  
hi george whats involved?



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george md

07-31-2005 20:01:34




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 Re: backhoe problems 480 case in reply to stressfree, 07-31-2005 17:25:09  
Can be done in place but easier to do with valve body removed . Buy all the orings and
other parts that are in the secondary reliefs,
replace them.

george



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stressfree

08-01-2005 01:33:53




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 Re: backhoe problems 480 case in reply to george md, 07-31-2005 20:01:34  
thanks george,winter time project.



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