641, 3pt Arms Will Not Raise

KCTractors · Sep 25, 2014

Working on a 641, the 3 pt arms will not raise. The hydraulic pump is working because I have pressure to the remote valve. I looked in the filler hole, did not see any oil flowing or splashing anywhere. I'm going to take the lift cover off, so what should I be looking for? I plowed with it this spring and it worked just fine.

CAEMI · Sep 26, 2014

I've been having 3 pt troubles on my 841 and some research I did pointed to air in the system (not my problem, though). Look up bleeding the pump...simple process but I forgot the steps.

souNdguy · Sep 26, 2014

He said his remotes work, that means his pump is pumping and it is NOT an air issue!

souNdguy · Sep 26, 2014

If your remotes work, next place I would think about is sticky unloaded valve or backpressure valve

KCTractors · Sep 26, 2014

Yep! Soundguy was right . The unloader valve was stuck. Took it out cleaned it, works just fine now. Thanks

KCTractors · Sep 26, 2014

Correction,it was the back-pressure valve that was stuck.

JMOR · Sep 27, 2014

(quoted from post at 22:02:22 09/26/14) Correction,it was the back-pressure valve that was stuck.

ardon me for being a skeptic, but which of these two pictures did the stuck valve look more like?

KCTractors · Sep 27, 2014

It was like the bottom picture.

JMOR · Sep 27, 2014

(quoted from post at 10:14:55 09/27/14) It was like the bottom picture.

K, thanks. That is as you first said, the unloader valve and makes more sense than back pressure. BP could have such a failure mode as to cause such but not very likely. Just interested for adding to gray matter storehouse.

641, 3pt Arms Will Not Raise

KCTractors

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