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Massey Harris & Massey Ferguson Tractors Discussion Forum
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Re: three point lift problem on a MF 1085

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Author  [Modern View]

05-02-2013 00:00:06

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Think I've done this one with you before, but here goes.
If you move the Position Control lever into "Constant Pumping", and set the Draft lever fully rearwards in the "up" position, does the engine labour slightly and can you hear a hissing noise from the centre housing? If so, this indicates that the hydraulic pump is developing pressure, with minimal leakage points and therefore the problem may lie with either draft adjustment or a control spring problem.
If you are not developing any pressure, you have one of a number of problems, possibilities are - blown stand-pipe "o" rings, cylinder to cover "o" ring blown, blown neoprene piston seal and/or scored bore, faulty pressure control valve assembly, worn pump, etc, etc. Diagnosing the hydraulic system for a low pressure problem is easier with a pressure gauge fitted to the top cover.
These old dinosaurs will need the fuel tanks removed to make access to the RHS round sidecover easier. Once the cover is removed, you can get a look at the underside of the lift(hitch) cover, and check for leaks mentioned previously. It will also enable you to work the control valve lever"manually", and further diagnose your problem. Hope this helps, Evan.

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05-02-2013 11:51:34

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 Re: three point lift problem on a MF 1085 in reply to Masseynut(Australia), 05-02-2013 00:00:06  
Thanks Evan. Yes you have advised me in the past. I put the tractor in a local shop and he could'nt fix it. He didn't put any gauges on it. He just said he couldn't work on it. I gave him the instructions that you gave me. Roy

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