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Ford Tractors Discussion Forum
Show Parts for Model:

850 ford

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Author  [Modern View]
JAL1012

10-16-2012 12:38:37
205.175.129.213



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Also have trouble with hyd lift I lift bush hog and it bleeds off.and lowers it lifts good when its cold I have a vane pump now but I just purchased a piston and manifold from a 2000 model 4cyl should I try anything before I change out the pump the fluids are full




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JAL1012

10-16-2012 19:30:50
173.19.202.10



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 Re: 850 ford in reply to JAL1012, 10-16-2012 12:38:37  
the control arm is locked down with the slide lock when its cold it will lift good the more you use it the harder it is to lift it gets to the point where you have to get off tractor help lift it then it still will go down



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soundguy

10-17-2012 04:57:32
107.41.182.245



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 Re: 850 ford in reply to JAL1012, 10-16-2012 19:30:50  
sounds like time for the tests and observations i mentioned.



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soundguy

10-16-2012 15:44:21
173.107.180.162



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 Re: 850 ford in reply to JAL1012, 10-16-2012 12:38:37  
just to be clear.

it lifts fine cold.. but won't lift hot?

the 'drifting down' is the 'when it gets hot part..? and not because the 3pt control is falling is it.?

if the friction disc is worn, and lets the 3pt handle fall.. the lift will of course drop.

if it's the war / heat issue..then yeah... pump work time.. or replacement as you are doing.. etc..

however for giggles.. you could pressure test it when hot.

after getting hot, chain upper lift arms to axles, plumb in a 0-3000 psi gauge to the plug in the 3x5 cover under the seat.. or even intot he head of the pump.. and then exercise the lift and see what pressure she makes.. yours likely won't hit relief pressure as it is probably bypassing..

i'd also look into the sump and see if there is excessive leakage from the top side..

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