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BH Sundstrand Hydrogear pump and transaxles


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#1 sacsr ONLINE  

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Posted February 25, 2015 - 06:34 PM

I recently purchased some old gear pumps and transaxles. In doing my research and from what I have learned from Daniel these hydrogears were used on the JD 140 tractor. Digging further, it is only the first 2-3 years of 140's (1968-69 and maybe 70 serial # 0-30,000) that they used this set up. From what I can gather, new parts for these units are no longer available. I talked to a gentleman tonight who said they did not even offer a gasket kit anymore. Also, looking at pictures of Don Lehmann's Roof Palomino, some version of this set up was used on them as well. I am sure there were others.

 

One of my tractors is fairly weak, and I am most likely going to swap it out with another one I have on the shelf. Before I do I want to test it to see how much pressure it is producing. I went to two local shops for a 0-1000 pressure gage and neither had one and both said go see the other guy, they are too expensive to stock. Looking on ebay, looks like there are plenty of them cheap.....am I missing something. Here is a link to the ebay page......any of these do?? http://www.ebay.com/...=p2047675.m2392

 

Also, do I jack up the tractor, so I can activate the rear end to see what type of pressure is being produced. Sorry, first time I have done this and looking for some guidance.

 


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#2 KennyP ONLINE  

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Posted February 25, 2015 - 06:44 PM

I have been thinking about doing this on my Eaton's so I will follow along here!


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#3 JDBrian OFFLINE  

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Posted February 25, 2015 - 08:12 PM

I'm not sure if those units have a way of measuring the main drive pump pressure. Charge pump pressure is usually measurable and is maybe below 1000lbs. You would likely need a higher pressure range gauge to measure the main hydro drive pump pressure. 


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#4 sacsr ONLINE  

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Posted February 25, 2015 - 08:16 PM

I think you are right. It shows a plug area where you can measure the charge pump pressure and says use a 600lb gauge, so figured I was good with the 1000. Still not sure what to expect and how to do it.



#5 glgrumpy OFFLINE  

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Posted February 25, 2015 - 09:39 PM

What about some Sunstrand or other manuals to look at? Must be some somewhere!  I would not think pressures would be that high on these systems, seems like 800 to 1000 is common range.


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#6 crittersf1 ONLINE  

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Posted February 26, 2015 - 11:10 AM

Scott, just put your calibrated finger overthe hole!


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#7 sacsr ONLINE  

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Posted February 26, 2015 - 11:20 AM

Only problem my finger calibration only goes up to 263.6 lbs. :D



#8 crittersf1 ONLINE  

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Posted February 26, 2015 - 11:42 AM

Time to calibrate more fingers!


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#9 coldone OFFLINE  

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Posted February 28, 2015 - 12:42 PM

I got my pressure guages and hose with adapters from Surplus center. I think total order was under $40.


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