641 Workmaster Hydraulics

(quoted from post at 09:28:30 09/04/20) I am newbie to tractor.

I have my grandfathers Workmaster.
Hydrauilic lift wouldn't work, (dad said worked year before)
Had water in hydraulic from setting up condensation.

I drained, and put diesel to dry out, dumped and put fresh Hydraulic fluid.

Still doesn't lift. I moved the allen nut off pump and its shooting fluid everywhere.

Where is my next place to look for any simple fixes?

If it gets to complicated I will have to find a local, or ditch the restore project. I HAVE THE complete service manual, but reads like greek to me.

I am at a lost of where to began to check to get it going. ( the tractor starts and runs great even after sitting a year.

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(quoted from post at 10:33:50 09/04/20) "Most likely' is not 'always' the case, but ...most likely the unloader valve is stuck. It only moves by a fairly low hydraulic pressure set by the backpressure valve (~40psi). Requires top lift cover removal and some dis-assembly to access.

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(quoted from post at 15:04:01 09/04/20)

(quoted from post at 10:33:50 09/04/20) "Most likely' is not 'always' the case, but ...most likely the unloader valve is stuck. It only moves by a fairly low hydraulic pressure set by the backpressure valve (~40psi). Requires top lift cover removal and some dis-assembly to access.

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Do you have a picture of what it should look like to give me starter point to look in book for

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