Intresting problem

I have a late model small block chevy V6 of unknown vintage that is being donated to me for a project I will me mounting this unit in a fixed frame connected to a hydraulic pump. My problem lies in 1. How do I cool this unit sufficiantly 2. What type of alternator will work to keep a battery charged to start this unit 3. How many hours will this unit run before it requires an oil change 4. What size radiator 5. What type of water pump. All of my parts will be cut out of other cars trucks or what ever else I find at the bone yard and this unit will never run more than 2500 RPM.
I hope you smart folks here can help me out I have looked all over the net and I couldn't find any information on this.

The answers depend on the application. Usually, hydraulic pumps like this are found in hydrostatic drive units, construction machinery etc and usually run at or near full throttle.

Such pumps are pretty inefficient. More throttle means a larger radiator is required. Airflow is key, use a decent fan and any 2 or 3 core mid sized or bigger car or light truck fan will do, unless the engine is run at full throttle all the time. In that case, a much thicker rad sourced from a heavy truck would be required, providing there is enough room.

Are you using a governor on the engine? Usually, if the engine revs are at or above 1500 rpm or so, any ordinary GM alternator will do the job to maintain a starter battery and power the ignition system........, unless you have some heavy electrical draws. Older GM alternators start at 37 amps and go up to about 95 or 120 amps, depending on if its a small frame or large frame unit.



Use the waterpump that came with the engine. It should be sufficient.

If you are using an hour meter, try oil changes at 100 hours, unless the operating conditions are very dusty.

Agreed. Just find a radiator from a 4.3L pickup. They came with the V6 and the radiators are big and plenty sufficient. Everything else should be just fine from the automotive application. You'll need very little alternator output. It will only take about 8 amps to run the engine itself. It won't have the lights, radio, and other draws like a car, so even a 20-amp alternator would be very sufficient.

As a far as actually hooking up the impliment, all engine manufacturers make SAE bellhousing adapters. industrial pumps and things all use SAE bolt patterns which make them universal. Its done that way so industrial components can be mixed and matched without worry. You should be able to find an adapter that bolts to the chevy on the front and is SAE 4 on the back.

This engine will be run at an idle most of the time 1500 RPM and occasionally it will be run up to 2500 RPM max. This block is missing it's water pump and alternator so I will need to find one as well as an electric fan for the radiator. I was planning on adding on to where the bell housing is supposed to be a dual or tripple V belt set of pullies with a mounting bracket for the pump. This will be running a 5.2 GPM 0.42 Cu pump which will be pushing a 5 and 2 inch cylinder.

I have an idea... how about posting some casting numbers. The most obvious engine would be the 4.3 V6, but there are a couple other possibilities. If its the 4.3, it uses the same accessory drive and water pump as any small block chevy.

Then tell us more about the hydraulic pump. Is it a belt driven pump or a crank driven pump? How about some part numbers, model numbers, casting numbers of the hyd pump?

That's a lot of engine for a pump of that size. It might be easier to locate the engine the pump was originally designed for, than to adapt a v6 to it.

Well all I have is a V6, I have no clue as to where to get a engine for this pump. I have yet to see any companies selling used forklift engines that actually run and are in decent shape. This pump has currently a spot welded metric chain sprocket on it which I will be shaving off to be replaced with a lovejoy type connector which will be inturn connected to a V belt pulley. What size engine would you fokes recomend for this pump?

Realistically, a 8 - 12 hp air cooled side valve engine (ie Briggs and Stratton, Wisconsin, etc) should be fine for this.

Most pumps like this use a horizontal shaft. You could use a horizontal shaft engine, too.

Your estimate is incorrect http://www.surpluscenter.com/Hydraulic.htm according to the calculator I would stall either of those two engines. I reqire 20 Hp per half on that dual port pump.

Your estimate is incorrect http://www.surpluscenter.com/Hydraulic.htm according to the calculator I would stall either of those two engines. I reqire 20 Hp per half on that dual port pump.
:rolleyes:

You would not 'stall' either engine. It would just not operate at the maximum pump output, but would still work just fine. Unless you are in a huge hurry to get the job done, a smaller engine will be okay.

I suggested the Briggs or Wisconsin engines because they are cheap and plentiful, (new or used) two concepts that I thought would be very helpful for you.

My point is to go with an easy to install, simple, compact, lightweight solution, instead of trying to cobble something together just because you have the parts lying around.

There are many other higher output air cooled industrial engines that would be fine for this application.

Personally, I have owned and operated several hydraulically powered pieces of construction equipment, most powered with 8-14 hp Honda OHV engines,
18 hp Honda V-twins, and Kohler 23 hp two cylinder models. All worked just fine. Hydraulic pumps are very forgiving and work with a wide variety of power levels.

Don't have a 'clue' as to where to get one? Look here:

http://www.kohlerengines.com/onlinecatalog/engine_guide_results.jsp?view=true
http://www.trupower.com/honda/honda-vtwin-engines.htm
http://www.wisconsinmotors.com/
http://www.briggsandstratton.com/engine_power/category.aspx?cid=1&scid=12

You will see you can get your 20 hp per half

Just my :2cents:

My point is to go with an easy to install, simple, compact, lightweight solution, instead of trying to cobble something together just because you have the parts lying around.

:shakehead Now where in the world would be the fun in doing that?:iceslolan