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1958 350 Utility Hydraulic Reservoir Leak


IHFarmall666
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I have a 1958 Farmall 350 Utility tractor with the backhoe/loader configuration.  I attached a picture of the unit attached to the right side of the hydraulic reservoir.  Hydraulic oil is leaking out of the plug/bolt shown at the end of the screwdriver.  The head of this is round, so I assume it is some sort of plug/safety valve/overflow valve.  Does anyone have experience stopping the hydraulic oil from leaking out of this area?

Thanks

Dave

Utility 350 Hydraulic Reservior.jpg

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Arrow points to a snap ring. Not sure what has to come apart how but I think there is probably O rings inside there 

Screenshot_20211121-122125~2.png

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Thank you for the responses.  I didn't notice the snap ring, but as you can see in my picture, I haven't cleaned the area much. I will go take it out and get an O ring.  

Thanks again.

Dave

I am able to depress the relief control (another response called it that), but with plyers, i have been unable to pull it out of the chassis.  I will scrape around the opening and try that.  Sure feels like it is spring loaded, so I will watch for it to pop out.  I included a picture of the relief control depressed.  I hope it pulls out.

Thanks

Dave

350 Util Relief Control.jpg

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Stoney1918, what you said is true for the 350 utility.  I put a wire brush on a drill and cleaned all the metal.  I clamped vise-grips on the little knob and wiggled it a lot. was wearing the little knob down.  It looked like it should wiggle out, but it was hung up.  Maybe, I thought if I started the tractor and used the hydraulics, that it might push the cap out.  As soon as I started it, immediate hydraulic system pressure popped the cap, a collar and the spring out of the hole....along with a fair amount of oil.  The bottom of the seat took the brunt of it, and protected me from most of the oil.  The collar and spring were laying on top of the hydraulic reservoir, and the cap was laying on the ground behind the left rear tire.  The good news is that its out, and I will go by the Case IH dealer tomorrow to try to run down the O ring and maybe a new cap.

Thanks all for your responses.

Have a great Thanksgiving and Merry Christmas.

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  • 2 weeks later...

MMI,

Thanks for the information.  I went to the Case IH dealer and got a single O ring and snap ring.  I put them on today, and oil still oozes out around the cap.  It also was letting air out of the system.  I am wondering if i should just run it and let it seat in there better, or try your o-ring part number.  I had to tap the cap/o-ring into the hole again, so I am wondering in the new o-ring might be damaged from forcing the cap in.  

If anyone has suggestions, send them to me.  The good news is it is oozing slow enough that I will get a few little projects done before it gets colder.

Thanks

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  • 7 months later...

Good morning from Michigan.

I am dealing with the same problem you've described in this thread.

Just wondering if you finally got it resolved.  I've gone through a couple of O-rings and snap rings.....but don't know what the actual sizes should be.

Thanks.

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