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Minneapolis Moline Tractors Discussion Forum
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5 Star hyd oil loss

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herald

03-14-2007 17:02:57




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I keep losing hydraulic oil into the rear end oil. I've replaced the o rings under the reservoir and it still leaks. If the seal is bad on the pump could that be the cause? or is it something else? Any ideas would be appreciared.




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herald

03-15-2007 08:21:00




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 Re: 5 Star hyd oil loss in reply to herald, 03-14-2007 17:02:57  
SWMolines, Thanks for the reply. One other question, On ebay there is a hyd.pump for a 335,445 for sale. Are those interchangeable?



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SWMolines

03-15-2007 10:58:32




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 Re: 5 Star hyd oil loss in reply to herald, 03-15-2007 08:21:00  
There are several different input shafts and couplers that were used on the 335/445/5 Star pumps. You would need to get the proper part numbers to be certain.

I wish I could be more help on that one.



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SWMolines

03-15-2007 06:36:29




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 Re: 5 Star hyd oil loss in reply to herald, 03-14-2007 17:02:57  
It is most likely the seal on the pump. The seals under the hydraulic system have no leak path into the rearend.

I have replaced several seals in the 5 Star pumps and have needed to use a sleeve repair kit as well. The sleeve kit repairs the groove worn into the pump shaft and makes a better sealing surface for the new seal. You should be able to get the seal kit a a good bearing shop or even NAPA.

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