rear steel hyd. lines leak on my 400

SDE · May 14, 2014

I took them off and had two pin holes repaired a few years ago. Tonight I discovered that they are leaking again. It may be that a new hole has developed or it could be that the repair has failed. Am I wasting my time trying to repair old, pitted steel hyd. lines?
Thank you
SDE

Janicholson · May 14, 2014

If pitted from the inside probably. If pitted on the outside, no. Outside pits csn be repaired, inside happen from unseeable rust. Jim

CenTex Farmall · May 15, 2014

We recently replaced the steel lines on Dad's 400 with hoses. Not "stock" but very cost effective for a work tractor.

We used 90 degree fittings out of the valve and hose the rest of the way. It was only a little bit tricky. Taking the instrument panel and sheet metal apart is a bit of a PITA, but we had it apart anyway to clean the valves and put in new O-rings.

SDE · May 15, 2014

Cost effective. Sounds like my kind of solution. Thank you. I will check out the cost of repair, or replacement of the steel line.
SDE

SDE · May 15, 2014

The pitting was on the curved section and the new leak appears to be at the same spot. I thought it might be something I should show to the people at the shop that repaired it the first time. Allow them the opportunity to do the right thing, but I do not hold out much hope for a free repair. I had not used the hydraulics on this tractor for any work since the repair.
Thank you
SDE

mkirsch · May 15, 2014

You said "a few years." I think you're well beyond the statute of limitations on "do the right thing" here.

Just because you didn't use the lines does not mean that they didn't continue to deteriorate over the past few years. The pits are thin spots in the line where the steel is rusting away. Even if you do manage to stop the rust there will be areas that are borderline where a few years of vibration and a little bit of use will cause new leaks.

Regardless of your intentions for this tractor, I would recommend replacing with hoses and being done with it. You will only be chasing your tail on these pits until the pipe finally ruptures catastrophically.

El Toro · May 15, 2014

Take the old hydraulic lines along so you get the correct size and swivel nuts. Hydraulic hoses will withstand the vibration. We have Colliflower in our area and they will make them while you wait if they're not busy. I made these
using reuseable swivel nuts for my garden tractor. They're JIC fittings. Hal

Mark in Upstate · May 15, 2014

Cen,
Describe how the tie in to the Hydro Touch worked, please.

mkirsch · May 15, 2014

(quoted from post at 07:59:35 05/15/14) Cen,
Describe how the tie in to the Hydro Touch worked, please.

Mark,

I think the holes in the valve bodies are threaded and will take a standard SAE O-ring style fitting, once you've removed the OEM steel lines.

CenTex Farmall · May 15, 2014

We just unbolted the plate with the lines from the valve body. It seals with O-rings but the valve body is threaded with 1/2" pipe thread. We simply put one hose in each port and done.

Mark in Upstate · May 16, 2014

Thanks,
I had cut my lines under the dash and used HD ferrel coplings to hydro hose. workd good.
I i know if I have a problem to plumb directly. 450.

rear steel hyd. lines leak on my 400

SDE

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Janicholson

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CenTex Farmall

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SDE

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SDE

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mkirsch

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El Toro

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Mark in Upstate

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mkirsch

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CenTex Farmall

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Mark in Upstate

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