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Allis Chalmers Discussion Forum

hydraulic question allis b tractor

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05-08-2008 18:13:46

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when i lift my 5ft mower deck, the hydraulics will not hold impliment up. it lifts up great , but floats down soon as you release lift lever, any ideas what it could be? i dont see any leaks, and fluid levels seem good. thanks, JIM

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05-13-2008 19:05:04

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 Re: hydraulic question allis b tractor in reply to tooltime, 05-08-2008 18:13:46  
Mine did the same thing and I was able to fix it by installing new check valve balls and lapping the seat with a home made tool. Because I had to buy a whole box of each size ball I have a bunch. If you would like to try this I could supply you with what you would need. You can contact me at wrmann@reliant.com

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05-09-2008 18:30:23

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 Re: hydraulic question allis b tractor in reply to tooltime, 05-08-2008 18:13:46  
on the top of the pump, there are 3 hex head caps. under these caps are the valves the regulate the flow of oil. 1 is the relief valve the other 2 are flow valves. these could be dirty and not sealing properly. They consist of a spring and a ball bearing that lays in a seat. Bob

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