630 breakaway couplers leaking

jkmdg · Apr 16, 2019

I have been working to get my powrtrol and rockshaft working on my 630. The hydraulic pump probably hasn't been engaged in at least 20 years. I put fresh oil in, then I engaged the hydraulic pump and worked with the levers. It's a single remote system. Then after shutting off the pump and moving the remote cylinder lever to a neutral position, I still am getting some oil leaking out of the breakaway couplers (or barrels or what each person calls them). Doesn't really stop leaking after a few minutes either, its just a very small amount dripping out over time now. I am guessing that there is o rings or seals that have gone bad after I started working with the system again? I have a parts diagram, I am just wondering what parts and how far up I need to stop the leaking in the couplers? Thank you

David from Kansas · Apr 16, 2019

Probably rust somewhere. Rebuilt the couplers on my 730 a few years ago and just replaced them with new ones that are exactly like the originals. Was a pretty easy project.

Bob · Apr 16, 2019

Have you had anything plugged into the female coupler bodies?

Point being, there may be some debris under the checkballs, preventing them from seating oil-tight.

If this is not the case, there is no parts breakdown of the coupler bodies beyond the O-ring that seals to the male tip, and that is not involved when they leak without a tip plugged in.

Old part number for the coupler assembly was AF3000R, replaced by C14619, at about $20.00.

I don't know if they are "correct police" exactly like the originals, or not.

If the checkballs don't seal after using the couplers, as a temporary measure to stop the dripping you could install new O-rings, R21722, and plug in a male tip plugged at the threaded end with a 1/2" pipe plug.

Mike M · Apr 16, 2019

Well you can install new couplers pretty easy. I did but still wanted to seep a little oil. Only way I could stop them was to buy an extra set of tips and put plugs in them and insert them into the couplers and that stopped the leaking.

johndeeregreg · Apr 16, 2019

you can replace the R495R o rings in the couplers where the hose ends seal then get new AF3001R dust plugs. these are the original steel plugs that seal with the oring i mentioned. even if you replace the whole coupler you'll still want these plugs to keep everything clean.

630 breakaway couplers leaking

jkmdg

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David from Kansas

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Bob

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Mike M

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johndeeregreg

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