Ford 640 hydraulics

cmkmtrucker · May 28, 2019

My 640 had water in the fluid when I got her. Several changes later and the 3 pt is very slow and won't even lift my weight. Do I have a bad pump or could it be something else?

JMOR · May 28, 2019

(quoted from post at 11:58:15 05/28/19) My 640 had water in the fluid when I got her. Several changes later and the 3 pt is very slow and won't even lift my weight. Do I have a bad pump or could it be something else?

ore likely leaks. Most often at piston ring. Look inside when lifting.

cmkmtrucker · May 28, 2019

(quoted from post at 11:45:05 05/28/19)

(quoted from post at 11:58:15 05/28/19) My 640 had water in the fluid when I got her. Several changes later and the 3 pt is very slow and won't even lift my weight. Do I have a bad pump or could it be something else?

Click to expand...

ore likely leaks. Most often at piston ring. Look inside when lifting.

I looked down the fill port and didn't see any leaks. I guess the cover under the pto lever is next.

Michaels Dad · May 28, 2019

Yes, that would be the next step.

cmkmtrucker · May 28, 2019

Any places I should focus on? Are there seals in there that can fail? Where is the pressure relief valve?

JMOR · May 28, 2019

(quoted from post at 21:45:32 05/28/19)
Any places I should focus on? Are there seals in there that can fail? Where is the pressure relief valve?

here are two of them, one for the pump and one for the ram cylinder and neither are ever the problem. OK, so never say never.

Ford 640 hydraulics

cmkmtrucker

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JMOR

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cmkmtrucker

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Michaels Dad

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cmkmtrucker

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JMOR

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