replacement O rings

markhait · May 2, 2017

I bought a used JD 2305 tractor last week and it is in excellent condition. Only 400 hours on the engine meter too. Anyway, the FEL had a dripping hydraulic coupler. I ended up replacing 2 of them for $27 each only to discover that one of the lower ones is dripping too. I'm not too surprised at the dripping since they are quick disconnect, but I'd like to limit the drips as much as possible since the hydraulic fluid is $25/gallon!
I read that you don't have to replace the coupler, but just replace the o ring inside. Makes total sense, but the JD dealer didn't have replacement o rings. I tried looking them up on google, but wasn't sure if the o ring I found was for the coupler or for the hose end that screws into the coupler.
The coupler is a AM102487 from JD. Does anyone know where I can get replacement o rings for these couplers?

PILOON · May 2, 2017

Take off a sample O ring and go to your local auto parts, that or purchase an assortment on Ebay. or a Chicom web site.
O rings are cheap.
Generally what happens is sand or grit damages the O ring and only replacement is needed.

oosik · May 2, 2017

I'm really surprised that the JD dealer didn't have replacement O-rings............ However, I do as PILOON suggests, my local Napa store has any/all I might need for my Kubota. There is no good reason to have a dripping hydraulic connector, of any type, when changing an O-ring usually solves the problem.

CalG · May 2, 2017

A little off topic, but......

I needed to replace an o-ring in a coolant system. (water and antifreeze). I found the correct size on my selection of Air conditioning "stuff". (the light green o-rings)

Should I expect problems down the line? I know o-rings for oil are not the same as o-rings for water, but Refrigerant?

Sysop · May 3, 2017

Hard to say, the AC ones may be formulated to withstand repeatedly getting very cold whereas most O-rings are formulated to withstand repeatedly getting hot. Overall I would think the AC ones were tougher, but the temps may be the downfall.

Tx Jim · May 3, 2017

After a little research I found this part number for o-ring but I couldn't locate any spec's for the o-ring. M122638 which is $00.45 at JD dealer

muddstopper · May 3, 2017

Usually the green orings are for air conditioning. They are made a little different, shape, than orings for oils. Just last week, My grand daugther was having problems with her power steering. Some one had replaced the pump and installed a new rack, but she was having to keep refilling the pump with oil. Climbing under the car, I could tell there was oil around the rack gear and you could tell it was leaking around the lines. everything was tight so I removed the lines and one line had a regular oring and the other had a green oring. You could tell by looking at the orings that the green one had a sq looking edge, instead of a round edge. I took the orings to the parts store and I think it was 45cents for two replacements. Put car back together and no more leaks. If someone is working on a ford escort, one Oring is 9m and the other is 11mm on the power steering lines.

PILOON · May 3, 2017

Generally the black will do for hydraulics and are the less costly.
Also black is very commonly stocked and even available in assortment kits at reasonable $$'s

TRactor hydraulic oil is basically a lower grade of distilled petroleum unlike aviation hydraulic that is very strong in that it will actually strip paint and eat rubber.

smokinmad · May 3, 2017

Well I guess time will tell on that Green O-Ring, atleast you know how to put a Black one in if needed...lol

Piloon....so what your saying is we need to use Aviation O-Rings, cause their built for more Aggressive Oil....makes since

PILOON · May 3, 2017

smokinmad said:
Well I guess time will tell on that Green O-Ring, atleast you know how to put a Black one in if needed...lol

Piloon....so what your saying is we need to use Aviation O-Rings, cause their built for more Aggressive Oil....makes since

That aviation hydraulic oil could be sold as paint stripper! (univis J --) LOL.

I had a client that worked for Shell and was a chemical engineer.
He stated that hydraulic oil was about the cheapest product made and we'd be much better to use standard SAE 30 engine oil at not much $$ more.
Aviation hyd oil is not flammable while automotive (tractor) likes to burn.
Some tractors actually specify SAE grade oil vs hydraulic.