Splitter pump upgrade.

I believe the direction of pump rotation has to match the direction of engine rotation. I may be wrong though. Maybe Horkn our resident hydro guru will chime in and school me.

 

With 6.5 HP I'd go with the 13-16. Shouldn't work the engine to hard. Rotation does need to match the engine. I've flipped the gears in pumps to change the direction though.

Im not familiar with your coupler. Is there rubber bushings between the cogs? If not I would replace it with luv-joy since your engine load will increase.

 

Unfortunately, I don't have much advice to offer Bob. I haven't ever wrastled with hydraulic pumps before. FWIW, that mount looks very similar in dimension to my 30T forest king's setup. I'm not sure what's going on under my Huskee 22T...never looked under there before.

 

Lovejoy? Pics?


I think I'll unbolt everything and draw you guys some pics of rotation...

 

Here is a good calculator for determining cycle time for splitters:
Log Splitter Speed Calculator
I wouldn't go any higher than 13 GPM.

 

Make sure your engine has enough power to turn the new pump. Also make sure your tank and hoses are large enough.

 

Keep in mind that these speed calculators are based on maximum RPM's usually 3600.

 

Good thought, bit if I double my volume I double my speed, right? I think cycle time is almost 35 seconds right now if memory serves from when I timed it.

 

Depends if your hoses,elbows,filter, and valve can also flow as much as the pump at max rpm.

 

Your cylinder rod diameter has a huge influence on return stroke.

 

Sounds like it's time for pics here.... I'm in beyond my experience here. Very glad I posted up asking for help. I LOVE THIS PLACE!!!

 

Think about what actually happens to move the ram..... it fills up with oil, right ? How much oil you say.....well, figure the volume. Volume equals pi times radius squared multiplied times the length of the cylinder. V = 3.14 x r2 x length. So if you have a 4" cylinder thats 28" long, V = 3.14 x 2x2 (2 squared) x 28. The answer to that equation will be in cubic inches. Whatever that volume is then has to be divided by the cubic inch volume of one gallon of liquid. There is about 225 or so cubic inches in one gallon if memory is serving suitable at this point.....

So that number should be able to be used to determine how long it will take to 'fill' your hydraulic cylinder with a pump capable of pumping "X" gpm.

This will run fairly true to form if you are using a single stage hydraulic pump with a gasoline engine sized approximately 1 to 1 1/2 hp per gpm of the pump. If you are using a two-stage pump, the speed will be somewhat different because though the 'return speed' of the ram will be quick, the 'work' direction COULD be slower due to the automatic transfer of the hydraulic fluid to and through a smaller orifice internally once a pre-determined back pressure is felt against the ram. That's why such a small engine can be used to operate splitters with high gpm ratings. When it switches to the small orifice, it takes less hp to pump the oil through that tiny (by comparison) opening, but it takes longer due to the lesser volume of oil filling the cylinder...i.e. slower movement for the ram.

IIRC, the tonnage of a splitter is figured by simply figuring the area of the cylinder and multiplying it by the relief valve setting on the control valve then dividing that number by 2,000, which is one ton of force. I gotta admit there's a little fuzziness going on in the cranial cavity so hopefully I'm remembering correctly and if not, may I stand corrected and bowing with hat in hand...... Maybe I'll rehash this in the morning after sweeping the cobwebs out with a few hours sleep.....

 

Yes, you need to have the pump match the direction. I think all these little guys are clockwise.

Yeah, of definitely go with a Lovejoy, or marginally with a damper in between the coupler halves.

I'm no engineer, but work with them at my place of employment. Hydraulics is our forte where I work.

 

I'd say that's pretty spot on from what I see as well.

I wouldn't go bigger than a 13 GPM unit on a 6.5 hp motor though.

 

I meant what tractorman said.

Cranium drainium.