BX25 Mid PTO Pump or BUST

[J_J]

Artisan,

Since you have 2500 max rpm on the mid PTO, a pump that would give you 10 GPM would require a .9 cu in pump.

Run the 10 GPM using an 8 cu in hyd motor, will give 289 rpm, and torque = 3822 in lbs.

If you want lower auger rpm's, and more torque, use a larger hyd motor

10 GPM, 10 cu in hyd motor, = 231 rpm , = torque of 4777 in lbs

 

[J_J]

Looking at the parts list for the BX-25 it looks like the mid PTO shaft is a gear driven shaft.

 

[Iplayfarmer]

Looking at the parts list for the BX-25 it looks like the mid PTO shaft is a gear driven shaft.

There has to be a way to tie into that gear instead of messing with the PTO output shaft. I would think that you could get a pump installed in place of the Mid PTO housing that would give you the same or better ground clearance.

 

[CJONE]

There has to be a way to tie into that gear instead of messing with the PTO output shaft. I would think that you could get a pump installed in place of the Mid PTO housing that would give you the same or better ground clearance.

Yea, it could be done with a major helping of cash!!! BUT what everybody except JJ and a few others is not seeing is you only have so much HP. You could build a powerpack for what that adapter will cost. CJ

 

[radioman]

There has to be a way to tie into that gear instead of messing with the PTO output shaft. I would think that you could get a pump installed in place of the Mid PTO housing that would give you the same or better ground clearance.

I wouldn't. the HST tranny and rear pto and BH all shares same oil. The MMM pto shaft is high enough for a pto motor to mount on provided he gets the right one so it will clear at same height or better as low part of rear axel housing.

 

[SPYDERLK]

Larry I guess I just want to try to save it a little. For semi short tasks of
spinning it up to do a task I see no issue and indeed I step aside to your
better knowledge, ok, Pedal to Da' Metal it is then.

I have not given up, I betya I am missing something here, or I need to look
at it a lil different. Gosh it is screaming for something to do under there. I
mean physics can't be thwarted but there is a gimmic, a way, something I
have not found yet that would be stellar for usage of the BX25's mid PTO I
bet. Heck this afternoon I looked at a hydraulic T-Post Fence driver and I
believe it consumed 5.3 G'sPM , If I created 6.86 GPM at 75% were in the
money for that tool, and that would be cool so...
--------------------------------------------------
. I wrote Danfoss and sure enough someone passed the
buck and I have yet to contact his asociates for they have no email, but I
will and I will attempt to ID and get it's specs and or ask for a pump to
match my givens with that configuration.

It's hard to do this from my seat, once these guys realize I am pumping
them for info and don't know what I want and they can't just ask for
for a model number and take my CC there not interested. I guess I can't
blame them, but if they found me a pump for a decent price I would be a
buyer. I need a spec sheet first, or a CAD file so I can chew on it and THAT
means they have to give up a model number w/o a sale, and in their minds
now I am off to price shop it...so it is hard.

FWIW

When setting up your system you will need to consider drive RPM, pump displacement, and Max system pressure you want the setup to support. This should match or be a little below your available drive HP. You can always set your pressure relief setting downward when you are driving something with minimum pressure tolerance or need. You can vary engine RPM to adjust hydraulic delivery to give the implement motor the speed you want. The implement will turn that speed, subsiding only a little under load, until you hit the set relief point ... then it will stop. Implements usually come with motors rated in the 2-3 KPSI range. If you limit your system to a 2500psi capacity at max drive HP you will not be able to adjust it up to 3K when you need it for a more demanding situation that requires more torque from the motor. Your engine will stall. If you choose a slightly smaller pump so that your available HP will push [a little less] fluid at 3000, you will be able to set your relief at up to 3 to get more torque from the implement motor. This type of setup lets you get decent torque from small motors, but since it will deliver less volume per revolution of your engine, the motors large or small will not run as fast -- But an implement often is not so speed critical. It must however, have enuf applied torque or force to move.
larry

 

[Iplayfarmer]

Yea, it could be done with a major helping of cash!!! BUT what everybody except JJ and a few others is not seeing is you only have so much HP. You could build a powerpack for what that adapter will cost. CJ

Agreed the first adapter would cost a bundle. I'm daydreaming that someone will mass produce some kind of aftermarket ad on that those of us less creative types could buy and bolt in place.

That's probably a little too far fetched.

The nice thing about that Mid-PTO is that it turns at a high RPM. You can get a good gpm flow with a much smaller and cheaper pump than you'd need for the rear PTO.

 

[Artisan]

Guys can I ask;

If I am standing at the front of my tractor looking at the rear, and I glance
down, I see my Mid PTO Shaft spinning CW. This is called a CW rotating drive right? OK, so if I were to buy a pump, wouldn't I want to buy a CCW pump? Is that how it works? Makes sense anyways...

 

[SPYDERLK]

Guys can I ask;

If I am standing at the front of my tractor looking at/toward the rear, and I glance down, I see my Mid PTO Shaft spinning CW. This is called a CW rotating drive right? OK, so if I were to buy a pump, wouldn't I want to buy a CCW pump? Is that how it works? Makes sense anyways...

Yes, it makes sense. Who knows what the convention is tho, so be sure to describe fully. You want CCW as observed looking toward the pump, as I interpret.
larry

 

[J_J]

Guys can I ask;

If I am standing at the front of my tractor looking at the rear, and I glance
down, I see my Mid PTO Shaft spinning CW. This is called a CW rotating drive right? OK, so if I were to buy a pump, wouldn't I want to buy a CCW pump? Is that how it works? Makes sense anyways...

Yes, that is correct.

You will have to use the tractor max HP for the PTO to determine the correct hyd pump, taking into account the fact of an 85 % efficiency loss from hyd pump to hyd motor.

What ever HP the hyd motor develops is the useful HP for doing work.