Super 55 Hydraulics question

The lift will occassionally raise and lower if you "fiddle with the controls and find the sweet spot" according to the previous owner. My question is this: since the other hydraulic components do work correctly, could the problem be between the quadrant controls and the pump (linkage issue) or something as simple as cleaning the over-pressure valve or changing filters, or could it be something much more complicated and expensive?

I guess a good start on this question is to verify that Oliver tractors equipped with auxilliary hydraulics and power steering did NOT have a seperate hydraulic pump system for these components. Is this correct?

Thanks in advance.

Justin
in Indiana

No, it does not have the pipe extension. The cap screws directly onto the top cover of the hydraulics. The one I'm looking at differs from the pictures a bit. The filter cylinder comes out towards the front and the cap is more towards the front dash than the location shown. Is this an older model shown?

I believe the number on the plate was 25-0100 if that helps.

Justin
in Indiana

So, according to the symptoms and what's on the tractor, what do you think should be my course of action? They've reduced the price down to $3500 as is. Worth it? What am I looking at to fix the hydraulics? Over pressure valve cleaning/replacement, aux hyds valve cleaning, or a pump rebuild? As usual, I have to have my ducks in a row before going to the wife with what I want to do.

Thanks!
Justin

If you need to redo the pump I am guessing you are looking at about $300. Go ahead and get all the little orings for the internals too.

The dealership was closed, so I have yet to verify if there is good pressure out of the aux hydraulics. It looks as if it will be worth picking up and working on. I just need to get my 8N sold!

Justin

I finally got a pressure reading on the aux hydraulics today. 80PSI is all they came up with. I guess I could start with the pressure-relief valve and clean out the aux hydraulic controls and see if that helps. If not, looks like a pump rebuild is in my near future (so long as my tractor sells so I can get this!).

Justin

The flow didn't look to be very substantial coming out of the aux. lines, but it looked as if there was a loose fitting or something because it did seem to run down the side of the tractor from under the seat when the lever was pushed. I will have to call and see if they will test the pressure at the aux lines.

I doubt they switched the SN tags, but who could tell at this point in time. Does this help explain it better?

Are you saying that it may be as simple as a leaking relieve valve? What other possibilities could there be, and what are some other things I can check while I'm getting a pressure reading?

Thanks again for the replies. Sure wish there was more information on these online!

Justin

• Super 55 hydraulic pump rebuild instructions

Thanks,
Justin

Can you also tell me where the draft control lever is? I'm assuming by your questioning that if there is adequate pressure on the aux. hydraulics, then the pump is good.

The dealer, not wanting to wrap up manhours and money into a tractor he can't recouperate it from, is going to sell it at a "discounted price" as is. I will be making the decision to purchase the tractor depending on what we conclude might be the problem (based on what I find on the tractor) and how much you think it may cost to repair.

Thanks,
Justin
in Indiana

If you have a 1955 with the external hydraulic control on the right side under the seat, do you know if it has had the field conversion to raise the level of the fluid so that you do not get air foaming into your hydraulic oil. It is real easy to tell if you look at the dipstick on the cover. It will have a pipe extension to compensate for the raise level. Check the picture.

Thanks,
Justin