Need a pto log splitter guru for advice J_J?

[LD1]

Fortunatally, you are in luck.

I found the specs on your BH pump here...Products - HUNG RONG COMMUNICATION MECHANISM CO., LTD.

It is a foreign website so everything is metric, but nothing a little conversion cant handle.

160 kg/cm2 is almost 2300PSI

26.5cc displacement is 1.62cu/in per revolution

At that, 540 RPM is only 3.76 GPM
1000RPM would be 6.98GPM

I am not sure what RPM you are running your PTO at for BH operation, but if you could possible spin that pump up to its rated RPM of 3500, it would be a 24.43GPM pump:thumbsup:

 

[LD1]

The emblem on the pump is a Prince emblem, but can't find a ref to an HR pump

It appears to be a crown pump?

I was typing my post when you must have replied:confused2:

 

[J_J]

LD1, You are right about the Crown pump.

You can test the flow by pumping fluid into a bucket.

That pump probably has a pressure rating of 2000 psi to 2500 psi.

 

[Car Doc]

Fortunatally, you are in luck.

I found the specs on your BH pump here...Products - HUNG RONG COMMUNICATION MECHANISM CO., LTD.

It is a foreign website so everything is metric, but nothing a little conversion cant handle.

160 kg/cm2 is almost 2300PSI

26.5cc displacement is 1.62cu/in per revolution

At that, 540 RPM is only 3.76 GPM
1000RPM would be 6.98GPM

I am not sure what RPM you are running your PTO at for BH operation, but if you could possible spin that pump up to its rated RPM of 3500, it would be a 24.43GPM pump:thumbsup:

Man LD1 you are amazing hahaha that is fantastic info you saved me a lot of head scratching!!! THANKS

(made in china that just figures :laughing: )

On the BH simply for conversation and I would have to do the math but I run it @ 1200 rpm in 3rd gear which is the 1000 rpm @ 2200 speed however that computes it works real good however it works out gpm wise. :thumbsup:

 

[Car Doc]

LD1, You are right about the Crown pump.

You can test the flow by pumping fluid into a bucket.

That pump probably has a pressure rating of 2000 psi to 2500 psi.

I would probably have to pass on a flow test JJ in this instance that would be above my comfort level thanks anyway! :thumbsup:

I can see myself spraying hyd oil all over the shop and/or kicking the bucket over hahaha I am well known by my colleges and employees as "Mr Mess" anyway but that one there could top my best yet if I were to tackle that one! :laughing:

 

[Car Doc]

The way I am seeing this is at 10-20 something gph and 2200 psi I may have a high speed on the ram but low splitting force is that how you guys see it and I haven't done any math just throwing that out to get a feel of it?

I know on the BH I can hear the pump bypassing at times it wont do everything I ask of it and these Elms are some tough trees sometimes to crack...

I am still going to try anyway on the splitter it needs a proper mount without a doubt but just for grins I ask these questions for now. fwtw

 

[J_J]

LD1 has said that at 1000 rpm, you might about 7 GPM's, and that will give you a 4.2 sec cyl extend time with your 16 in cyl. and about 3.12 sec for the return stroke for a total split time of 7.32 sec, which is a fast time.

Force about 8 tons.

 

[Car Doc]

LD1 has said that at 1000 rpm, you might about 7 GPM's, and that will give you a 4.2 sec cyl extend time with your 16 in cyl. and about 3.12 sec for the return stroke for a total split time of 7.32 sec, which is a fast time.

Force about 8 tons.

OK thanks again JJ you too are a wealth of info!

One more question if I may-my cyl says on it its 20 tons and it is about 24-25" long and is just guessing a 3.5" cyl based on the od which is close to 4" is the 8 tons a fixed force or does it grow exponentially with rpm?

Sorry if that seems simple or stupid to you guys the logic of the whole thing is not grasping my brain at this point I am a car mechanic these computations are out of my field I deal with micro-electronics for a living.

 

[LD1]

OK thanks again JJ you too are a wealth of info!

One more question if I may-my cyl says on it its 20 tons and it is about 24-25" long and is just guessing a 3.5" cyl based on the od which is close to 4" is the 8 tons a fixed force or does it grow exponentially with rpm?

Sorry if that seems simple or stupid to you guys the logic of the whole thing is not grasping my brain at this point I am a car mechanic these computations are out of my field I deal with micro-electronics for a living.

Tonnage is only a factor of PSI. And even running the rpm's slow, you are still making full PSI (usually).

The rpm's vary the GPM's of the pump, thus effecting the speed, but not the force.

And IF the ram says 20T on it, I am betting you have a 4" cylinder, because those are almost ALWAYS listed @ between 18-22T. I have NEVER seen a 3.5" rated @ 20T.

And on a side note, IF it is indeed a 4" cylinder, your 2200 psi would net you around 14T. You would need around 3200PSI to get the rated 20T

 

[Car Doc]

Tonnage is only a factor of PSI. And even running the rpm's slow, you are still making full PSI (usually).

The rpm's vary the GPM's of the pump, thus effecting the speed, but not the force.

And IF the ram says 20T on it, I am betting you have a 4" cylinder, because those are almost ALWAYS listed @ between 18-22T. I have NEVER seen a 3.5" rated @ 20T.

And on a side note, IF it is indeed a 4" cylinder, your 2200 psi would net you around 14T. You would need around 3200PSI to get the rated 20T

Now that may work :thumbsup:

I hardly ever stalled the splitter as is the only thing that stopped it were crotches and knotheads and always was able to turn them around and attack going the other way. (no jokes thats wood chuck talk they know what I mean )

thanks again guys for the education!