rebuild, replace, or trade?

Fordfarmer · Jan 10, 2017

My NH 1400 hasn't given me much trouble in the 12 or 13 years I've had it, but I have seen a number of parts become listed as NLS from Fiat/New Holland in the last couple years. Not many of them in boneyards anymore, either. Which brings me to my question... the hydro in the 1400 is getting weak. 2400+/- hours on it, '77 model. I don't have the book handy, but it's a Sunstrand if I remember right. I have no experience working on hydros, but have the knowhow to rebuild gas or diesel engines. Is rebuilding a reasonable route to take? Should I try to find a donor and just swap them? Or is it time to think about trading? (Checkbook says no to that one...but I know there will come a time) And would the culprit be the pump or the motor? (both?)

4520BW · Jan 10, 2017

Not sure where your located but there is a shop in Illinois that has done several for me and is reasonable on his price. Interesting story on how I found him... I sold a 148 deere loader to a gentleman from Illinois and I was working on my 7720 at the time pulling the hydro.We got to talking about it and said he had the place do a lot of work for him, so we ended up loading it on his truck and he delivered it for me...free even. Proves there's still so honest people out there.

Mtnfarmer · Jan 10, 2017

Sunstrand has dealers all over the US that rebuild those pumps someone bought them I think but a search on the web will give you a list of dealers. NH selfpropelled choppers used sunstrand and so did fox I think they are same pump maybe same as yours called the dealer closest to me when I bought my 6250 fox and can't remember price for a rebuild but it was very reasonable versus a donar replacement they also told me half of all hydrostat weaknesses were valves and bypass problems told me to monitor filters by cutting them open and check for wear metal in filters No metal would indicate good pump and motor most of the time and if I had weakness look at other components my fox has preasure check points that you can hook gauges to to verify preasure at these differ places. Something to consider

ky1650 · Jan 10, 2017

I have a TR 85 rebuilt hydro that I never used is it the same as the 1400

Mtnfarmer · Jan 10, 2017

(quoted from post at 18:20:37 01/10/17) I have a TR 85 rebuilt hydro that I never used is it the same as the 1400

Know nothing about combines don't own one but I do know that the pumps on a 1880 NH and my fox 6250at least look the same and also the drive motors my 6250 is late eighties the 1880 was replaced by the 1890 in the early 70's so theses pumps and motors were used on a variety of equipment should be some model numbers on the pumps if they are the same I don't see why not A sunstrand shop could tell you more about that the one I talked to told me what preasure range and flow mine was over the phone just from the numbers from the tag

Mtnfarmer · Jan 10, 2017

Look up sauer danfoss sunstrand pumps think they have picture of all the sunstrand pumps and motors on their website The way I found my dealer/ builder was I just did a search for sunstrand hydro pumps with my closest city and it gave me a list of people who dealt with them from closest to farthest

RedRoundhead · Jan 10, 2017

Ditto to the other replies.

Sundstrand/Sauer-Danfoss made very many of those type hydros. Rebuilt units are very affordable (1500-pump, last time I looked.

As Mtnfrmr stated, get the manual for the unit you have - with new fluid and filters, there is a charge pressure reading to check, which is regulated by a spring. Springs get weak somtimes. The charge pump can get weak as well-it is in the hydro unit (right on the end, easy to see)but separate from the swash plate side ofthe pump.

I was able to search the interweb, and download the ones for my equipment. Very informative. My hydro was sluggish, but with fluid and filter, and a charge pressure adjustment, it is snappy again. I do 40 acres of extremely hilly corn every year, pulling a forage box - works great so far.

Best of luck - if the rest of the machine is in good repair, I would keep it.

Fordfarmer · Jan 11, 2017

Thanks, guys. Lots of good information.
I've never seen any test ports on the combine, but I've never been looking for them,either. Makes sense that there should be some. I'll take a look...once I'm over this flu bug the kids brought home from school.

rebuild, replace, or trade?

Fordfarmer

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4520BW

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Mtnfarmer

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ky1650

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Mtnfarmer

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Mtnfarmer

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RedRoundhead

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Fordfarmer

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