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Ford Tractors Discussion Forum
Show Parts for Model:

Re: Ford 640, lift stuck up

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soundguy

02-18-2014 08:33:07
184.240.73.97



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drian first then dump my stuff in.

edit that to be 2g diesel and 1qt atf and a couple pints alcohol.

the earleir 3g version is for N's with common sump. while te hyds on a 00/naa will hold 3g.. no need to fill it that much for a flush. waste of diesel.




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NYTX

02-28-2014 17:51:48
70.196.7.79



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 Re: Ford 640, lift stuck up in reply to soundguy, 02-18-2014 08:33:07  
Update

When I removed the plug, fluid came out (got a soaking) and the lift fell.
I ran the cleaning solution through twice and drawbar still raises to highest level as soon as I start it again.

It is now completely drained (no oil), and it holds the drawbar at level that I could pull a wagon with.

So, a few questions

1. Will I harm anything if I don't put fluid back in and hook up a wagon with very little weight and pull it around? I will not be using the hydraulics to lift anything. This is just a temporary setup until I can work on it again. If I put any oil in, it will likely raise the drawbar so high it will not be usable.

2. What are my next steps? I have the repair manual, but prefer not to just start taking things apart without knowing what I should be looking for. The disassemble looks straight-forward enough, but once all the bolts are out, which valve (using terms that correlate with the manual) should I focus on?

3. Any items should look out for when removing?

Thanks for all your help.

Glen

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soundguy

02-28-2014 18:29:23
207.30.46.70



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 Re: Ford 640, lift stuck up in reply to NYTX, 02-28-2014 17:51:48  
if you run it without oil you will ruin the 500$ pump bolted to the side of the engine.

if the lift is going max at start.. the unload valve is sticking.. you need to pull the lift cover to address it.



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nytx

02-28-2014 18:45:03
70.196.69.211



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 Re: Ford 640, lift stuck up in reply to soundguy, 02-28-2014 18:29:23  
Thanks. I will fill it up and post back.



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soundguy

02-28-2014 18:53:01
207.30.46.70



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 Re: Ford 640, lift stuck up in reply to nytx, 02-28-2014 18:45:03  
if you have to use it and need lift half up, run a hose from the 3x5 cover under the seat ( plug there ). and run it to the hyds sump fill, that will let pressure off the lift piston. then chain the lift arms to the axle with a block of wood under them to keep them at set height.

that willlet you drag a drawbar implement. and not ruin the pump. oil will cycle out of the top cover back to hyds sump under lefs side of seat ( fill hole )

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nytx

02-28-2014 19:27:32
174.230.3.155



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 Re: Ford 640, lift stuck up in reply to soundguy, 02-28-2014 18:53:01  
Thanks. I assume you are referring to a hydraulic type hose with threaded connections/fittings at each end so I can attach them.

Do you think I could find a standard hose or need to have one made since I am guessing the fittings are different at each end? I know the plug size, but I will have to look at the tractor in the morning to find the fill hole you are talking about.



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soundguy

02-28-2014 19:47:21
207.30.46.70



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 Re: Ford 640, lift stuck up in reply to nytx, 02-28-2014 19:27:32  
the top port is pipe thread, and the fill cap under yer left thigh is a bung opening. just cram the hose in there and stuff a rag around it..



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