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Massey Harris & Massey Ferguson Tractors Discussion Forum
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super 90 lift problem

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terry chancello

02-06-2005 19:20:41




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Lift will raise but will not lift a load, also you can push the arms down while in the raised position. Not sure what oil is in it possibly what is used in John Deere, just purchased from JD dealer, what weight oil do I need, any help will be appreciated




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MHF

02-08-2005 19:42:29




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 Re: super 90 lift problem in reply to terry chancellor, 02-06-2005 19:20:41  
JD oil is perfectly okay. Sounds like the relief valve on hyd. pump might be bad. It could also be orings on the stand pipe. There is also another little pipe with orings that fills the piston chamber, they could be blown. Has the Tractor been sitting? Somtimes when they sit around for awhile the metal rings around the piston stick because of rust you take it apart free up the rings and hone the cylinder. If you need any more info let me know.

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terry chancellor

02-09-2005 19:50:53




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 Re: super 90 lift problem in reply to MHF, 02-08-2005 19:42:29  
the tractor has set for over a year, everything else runs and works ok. can i get to the pump to inspect from either round plate on each side.



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mike martin

02-09-2005 21:53:55




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 Re: super 90 lift problem in reply to terry chancellor, 02-09-2005 19:50:53  
the super 90 is a complicated tractor, the sensing linkage is under the rear of the tractor. if it is drty it can't sense and may be part of the problem. the inspection plate if i remember is on the side where the dipstick is. on my 255 i had the same trouble, but i could reach insice th inspecyion plate and make it work what was broken was an eye bolt that cost me .65 to buy second hand and replace . tou have to take off the top cover.it may be the same on the super 90 . except for the obvious lower linkage differences.

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