Hydraulic Pump Use?

guido

Well-known Member
Hello,

I have had this little pump around for many moons. I don't know what would be used for. It is small enough to fit in the palm of my hand. Sure has a lot of pressure. I think it has never been used. It has a splined drive input. Any idea of its application?


Guido.
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Try contacting the pump company and see if the p/n is still in their inventory and what application it has or did have.
 
Hello DGinVT,
I did a quick search, could not find a listing for that pump,

Guido.
 
Try contacting "Agri Supply", "Northern Hydraulics" and " Surplus Center". They all have toll free numbers and see if you can talk to a pump person in the back room. Too many over the counter people don't have the background. This most likely is an older unit. There was another company that put out a red book catalog, but I don't remember their name.
 
Many of those old Vicker's pumps where used on loaders. The size of a pump does not matter it is the PSI that makes it do what they do. I have a pump about that size and it came off a loader
 
That pump would run a small loader like found on compact tractor. I used a .72 cubic inch for my loader and had plenty of flow. Here is similar pump....

http://www.surpluscenter.com/Hydraulics/Hydraulic-Pumps/Gear-Pumps/0-97-cu-in-DYNAMIC-GPF2016S9A-HYD-PUMP-9-7792-C.axd
 
Talk about talking to someone in the back room. I was having a problem with a new over head door that I had bought from a century old local family owned lumber yard.
I sat down with the sales man and he called the factory and asked to talk to the person with the least authority. We got my problem solved.

Dusty
 
That is not true, pressure only does good if it has something to work against, flow moves the cylinders.

Take the cu in / 231 x RPM to get GPM

.95 / 231 * 3600 = 14.8 GPM, so would work nice on a loader
 
My looked at it (she has better eye sight. She said it is 09.5. Guido, what is it? I think it was built for some military application. J.
 
OK, for some HP math

1.5 GPM is way to small for a tractor

15 GPM @ 3000 PSI = 26 HP
150 GPM @ 3000 PSI = 260 HP
 
Googled the P/N, at least part of it as I couldn't make out the entire number from the pic. That series seems to be all aircraft usage. So, probably a very good pump and about the right size to run a loader.

the little Case garden tractors use a slightly smaller pump to run the tractor, tiller, pull behind brush mower and loader.
 
Pressure is built up by what the cylinders have to move and GPM is the flow. You can have a low GPM pump but if it is set up to make say 4000PSI it can and will lift a lot depending on the size of the cylinders. It will be slow but it will do the job. Or you can have a pump that has high GPM and only say 1200 PSI and do the same job if the cylinders are large enough. I have worked at a company where we built equipment to cut oak staves so yep been around tons of hyd equipment and understand how they work. I have also seen guy install a high GPM pump on a loader and flip the tractor over due to the fact the lift came up super fast.
 
I fully agree. Based on the OP's statement that the pump fits in the palm of his hand would suggest that it is in fact .095 cubic inch displacement (and there are pumps even smaller than this available) which gives only about 1.5 gpm at full rated speed. This is the approximate flow rate of the pump on my Power King garden tractor that is used only for a small cylinder to lift the Cat 0 hitch. Even at its max pressure capability of 3000 psi you still aren't going to do any "real tractor" work with it. For example, the loaders on modern sub-compact tractors require at least 5 gpm and "real tractor" loaders require more like 15 gpm. It would have the pressure capability to operate a loader but the cycle time would be measured in minutes, not seconds. When calculating the pump capacity required to do a certain job folks need to consider the available hydraulic power which is the combination of flow and pressure, just like mechanical power is the combination of torque and speed. One parameter or the other by itself doesn't tell you enough to calculate how much work can be done in a certain period of time.
 
Hello J Schwiebert,
You can blow up the picture, plenty of pixels!
The pump is marked as a .95 cu. in. / rev.
That would mean a 3450 cu.in. @ 3600 its rated R.P.M.'s
3450/231 14.93 gallons would be the flow rate,

Guido.
 
Hello old,

I don't understand what you said about cylinder load and pressure? I thought that pump pressure is set and working-final pressure depends on cylinder volume.

Guido.
 
Most of the time a pump is just moving fluid in a circle and has little to no pressure in/on the system. But when you pull one of the control handles then the cylinders due to the work there doing increase the pressure in the system and then pump. Most systems have a relief valve in them so as to limit how much pressure can be built up in the system when they are moving or lifting a load. Years ago we had a vicker vane pump on our 841 ford and the pump got weak. My dad had a Ford place do the repair work and they found out the system at that time did not have a relief valve which caused problems with the new pumps
 
Please post a picture of the DRIVE SPLINES..............then I will know if there is a chance the pump was originally used on an AIR CRAFT POWER PLANT (ENGINE) ASSESORY DRIVE GEAR CASE. Air CRAFT power Plants (J79/LM1500/Rolls Royce Spay)use a common SPLINE on many applications. There is a designation on the IDENT:LABLE that is indicative of a MILITERY STANDARD.

Thanks....

Bob..
 
Guido:

Sorry, but NO distinct decimal point; so it would have to be (decimal) Zero Nine Five - 0.095 .
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I would like to know how you come up with those numbers. Gallons per minute on a cylinder is COMPLETELY irrevellent on power of a cylinder. 1 Gallon per minute or 150 gallons per minute if you're running the same pressure and cylinder you have the same force from both. The 150 gpm system will just go faster. Speed on a cylinder has absolutly no efect on the power output. Anyone who has run a WD allis Chalmers knows this. You can't even run a 60 HP motor on 3000 psi on 150 gpm.have a customer with a forage mixer truck with a pump that size. It barley runs the sixty hp motor that's on it.
 
Hello

The pump is marked 095 Cu. In. / rev. Big difference from .95. It is safety wired, I took a cap off and it smells like cosmolene, not sure about the Spelling. It is a 12 spline input and it measures .620 Inches. Here are more pictures of the pump,

Guido.
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