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Re: no hydraulics

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07-30-2013 03:41:04

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Sounds like you have 641D. That helps quite a bit.

Air in the oil causes the bubbles, water causes oil to turn milky.

Have you tried bleeding the pump? It sounds like you have removed the pipe plug from the front of the pump with the tractor running and that is where you saw the oil was full of bubbles and looked milky. Did that help the lift at all?

One thing to try, its requires about $20 in fittings. With the tractor off, remove the bleeder plug from the front of the piston pump. The get some pipe fittings. from the plug hole insert a short nipple, an elbow, a longer nipple, then a ball valve, and finally a hose barb. From the hose barb run a piece of clear plastic hose back to the hydraulic fill port under the seat. Insert the hose.

Once everything is installed and tight, close the valve and start the tractor. Now slowly open the valve. You should see oil flowing through the tube and back into the sump. If it is clear your pump is OK, if it is full of bubbles, let it run for a while, it may clear up. Then close the valve and see if the lift works.

My guess is that you will see bubbles and that this gets the lift going. If yes, and you let the tractor sit overnight, you will loose the lift again. This is a sign of a leaking wobble shaft seal in pump. We'll cross that bridge when we get to it.

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07-30-2013 05:19:12

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 Re: no hydraulics in reply to Kurt-NEPA, 07-30-2013 03:41:04  
thanks will try that, when I get the supplies, did try to bleeed the pump, this used to work, but it's past that point, thanks

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