0 ring installation - hyd. coupler

2x4

Well-known Member
New Holland 105 hp tractor. Hydraulic couplers leaked, 0 ring bad. Got new 0 rings in mail today, dealer had to special order them. Thought I'd order a pack of dozen; nope, packed one to a package $8 apiece. Neoprene? Not rubber but white colored. Old ones came out hard but new ones seem impossible to get into the groove inside the coupler. How do you get'em in the groove? Forcing cone of some kind? Old ones won't even go back in, as a check. Guess this is my day to learn something new, as is every day.
 
That they are white, sounds like Teflon.

Heating them in warm water softens them some, probably wouldn't hurt to heat the entire coupling to help the ring stay warm.

Any possibility the coupling screws apart? If not, just a matter of getting them in there without damage, whatever it takes. There are some oring tools available, various shapes of pointed hooks, but you have to really be careful not to damage anything.
 
Teflon will not seal good because not really designed to move a lot. Could be urethane which is off white and is more pliable. Most coupler orings are buna with some usueing Teflon backup. The most popalar orings usued in couplers -117 and -211. There is a higher pressure orings that are made of 2 types of material that are used in porta power couplers.
 
I know this is a cop-out but my son took them to jd dealer. For 4 was $250. But they don't leak any more!
 
they go in just like hyd.cylinder seals you got to get one side started and crumple them in not pretty but they will in
 
I start one end into the groove with my finger, then work around the circle to push the rest in. Then follow up with a steel pick, going around and around to push it flush. Lube area with WD40 or similar before starting.
 
(quoted from post at 15:07:49 02/15/17) New Holland 105 hp tractor. Hydraulic couplers leaked, 0 ring bad. Got new 0 rings in mail today, dealer had to special order them. Thought I'd order a pack of dozen; nope, packed one to a package $8 apiece. Neoprene? Not rubber but white colored. Old ones came out hard but new ones seem impossible to get into the groove inside the coupler. How do you get'em in the groove? Forcing cone of some kind? Old ones won't even go back in, as a check. Guess this is my day to learn something new, as is every day.

I use dentist tools (pick) to remove old and carefully get the new in the groove.
 
Likely, they are some sort of urethane.

Warm 'em up a bit and they will be easier to install. About the time you get good at it, you will be done.

For some of their newer tractors DEERE offers a choice of the hard urethane rings, or a rubber ring with Teflon backup washer for cold weather use.

A customer uses his tractor to feed cattle in extreme cold weather, and had some leaks, so I installed the cold weather seals for him.

Wonder if FIAT has such a choice?
DEERE version
 
I know this is a cop-out but my son took them to jd dealer. For 4 was $250. But they don't leak any more!
 

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