TC55DA Hydraulic Leak

90acres · Mar 1, 2009

I have a New Holland TC55DA. I noticed a hydraulic leak coming from the filter area under the drivers seat area. Upon inspection, the hydraulic oil was coming from above the filter. There is what appears to be a 4 inch long nut about an inch in diameter, brass in color that screws into the tractor. When I grabbed hold of the filter itself, the whole unit moved, including the brass nut. Is my problem as easy as tightening this nut or is this not a nut at all and something has cracked. Thank you in advance for any info you have.

RickB · Mar 1, 2009

You asked a question that can't be answered without seeing the problem. Try tightening the "nut", if that cures the leak, you are done. If not, further disassembly/inspection will be needed. I'm guessing the banjo bolt attaching the supply tube to the hitch valve is loose. The cure may or may not require new o-rings. But that's only a guess.

jinman · Mar 1, 2009

Is the part you are talking about shown in the attached diagram? If so, please tell us the callout number. I'm guessing that you might be talking about #57, but I can't be sure.

90acres · Mar 1, 2009

Yes, #57 is the one. Can I just obtain new o-rings, lube them and put everything back together? Do you know what size wrench #57 is? I sure do appreciate the diagram. I suppose I should purchase a repair manual. Any suggestions on where to get on online? Thanks.

dqdave1 · Mar 1, 2009

Messicks will have it

jinman · Mar 2, 2009

90acres said:
Yes, #57 is the one. Can I just obtain new o-rings, lube them and put everything back together? Do you know what size wrench #57 is? I sure do appreciate the diagram. I suppose I should purchase a repair manual. Any suggestions on where to get on online? Thanks.

Purchasing the Repair Manual would be a very good thing. I refer to my manual on my TC45D all the time. It keeps me out of lots of trouble.

I am not familiar with your filter assy. or your tractor. I was just posting the diagram so you could tell us what the part is and hopefully some other expert will know what you should do about it. The diagram I posted is not from the repair mainual, but rather from PartsSpring.com . The title of the diagram is in the blue heading at the top of the page. I didn't find it with the normal hydraulic diagrams. It took some searching since it had "Power Steering" first in its title. I think the description of the part only listed its name, not its size. Can you get on it with an adjustable wrench?

LetsRoll · Mar 2, 2009

90acres said:
Yes, #57 is the one. Can I just obtain new o-rings, lube them and put everything back together? Do you know what size wrench #57 is? I sure do appreciate the diagram. I suppose I should purchase a repair manual. Any suggestions on where to get on online? Thanks.

New Holland TC48DA / TC55DA service manual

LetsRoll · Mar 2, 2009

90acres said:
Yes, #57 is the one. Can I just obtain new o-rings, lube them and put everything back together? Do you know what size wrench #57 is? I sure do appreciate the diagram. I suppose I should purchase a repair manual. Any suggestions on where to get on online? Thanks.

Also, I sent you a PM.

90acres · Mar 4, 2009

Thanks for all the help with this one. I compared the diagram that Jinman sent with the one from the New Holland web site and they were a perfect match. I had the same trouble locating the correct diagram since it was labeled "Power Steering Pump and Hydraulic Pump". Turns out that all I need is the o-ring (#51 in the diagram).

Thanks to Lets Roll for a link to buy a repair manual. I knew I would need one eventually, but I thought I would be able to get away without one since since the tractor is still so new.