JD 850 (Yanmar) early 80s hoses connections

[Jackson 747]

I am having trouble getting some of the hydraulic hoses disconnected. These are the long ones (there are 4) which run from near the clutch to the rear under the seat. I have the one end under the seat off. But it did come off with an O ring and there doesn't seem to pull disconnect like the manual said. I am attaching a picture of the front end of the hose. There is a 90 elbow and I'm not sure how to uncouple the damaged hose. I have tugged on the various parts to no end. Thanks for any help. Jackson

 

[ctlguy]

The release collar is probably rusted. I would shoot some type of penetrating oil around the collar trying to get fluid into the release area. Let it sit, maybe some light hammer taps on the side of the collar as well to try to help loosen up. Worst case unthread from the hose ends and replace with new couplers if you cant get them apart after that. I am assuming you have already released any pressure that may be on the hoses.

 

[J_J]

Spray with a penetrating oil and tap on it and use pliers and a wrench if necessary. The sleeve on the QD must be pushed back a certain amount.