Digga skid steer auger PTO hydraulic pump

[Bitbob]

I Have a BX23s with the skid steer mtd Digga auger motor which turns real slow because of the anemic pressure and flow rate of the 23. I would like to mount a pto based hydraulic pump to provide a higher flow rate and pressure. However, I can't tell what [flow rate and pressure] pump I should get. The digga specs state [max pressure 3500psi@16gpm and max flow 30 gpm@1800 psi]. The pump I think would work is 2500psi and 16.6 gpm at 540 pto speed. So how would I figure out if the 23s at 540 pto speed could exceed either of these max specs? Also if the pto speed is 540 at 2500 rpm on the tractor if I run the 23s at lower speeds will the PTO speed run at lower speeds and thus drive the pump output at lower psi and gpm? Final question how can I stop the auger mtr other than by disengaging the rear PTO and thus the pump output.

 

[PoTreeBoy]

I Have a BX23s with the skid steer mtd Digga auger motor which turns real slow because of the anemic pressure and flow rate of the 23. I would like to mount a pto based hydraulic pump to provide a higher flow rate and pressure. However, I can't tell what [flow rate and pressure] pump I should get. The digga specs state [max pressure 3500psi@16gpm and max flow 30 gpm@1800 psi]. The pump I think would work is 2500psi and 16.6 gpm at 540 pto speed. So how would I figure out if the 23s at 540 pto speed could exceed either of these max specs? Also if the pto speed is 540 at 2500 rpm on the tractor if I run the 23s at lower speeds will the PTO speed run at lower speeds and thus drive the pump output at lower psi and gpm? Final question how can I stop the auger mtr other than by disengaging the rear PTO and thus the pump output.

The pressure required is determined by the torque imposed on the motor. Your tractor probably has adequate pressure. The flow rate determines the speed, which is your limitation.

The pump you're looking at would probably work. However, at its rated flow and pressure it would need around 25 hp. So a smaller pump would be prudent.

Yes, the PTO speed is proportional to the engine speed. You could plumb in a manual or electric valve to turn the auger on and off.

You'll need a sizable reservoir, filter and relief valve. The pump may have a relief valve in it.

 

[Smokeydog]

Big advantage of a hydraulic auger is being able to reverse rotation when stuck via valving.

Digga makes many augers with different specifications.

 

[North Idaho Wolfman]

You can't do it!
For mutiple reasons.
First: PTO HP is the Number 1 reason, you don't have enough of it to run a BIG pump like that.
Second: If you could get that much HP to drive the pump, it would overheat in a very short time from the lack of fluid and cooling.
This is just naming the two most glaring issues.

 

[GreensvilleJay]

It might actually run reasonably well, BX23S has about 18-20 PTO HP @ 540.
What's unclear is the 'digga specs'. I assume those are maximum specs so less GPM/PSI will reduce speed and 'ease of penetration'. Obviously clay material requires more HP compared to 'sandy soil'.

It'd be nice to see the 'digga' hydraulic motor specs to make a reasonable guess on how well it'd work. Also needed are the specs for the PTO pump. They should include a chart of RPM vs PSI vs GPM.

General rule of thumb for oil is 2X the GPM, so if you run 10GPM, you'll need a 20 gallon tank. More is better and shape matters, The larger the surface area the better convection cooling you'll get.

As for on/off control...I'd think the 'digga' would come with a 'reverse-off-forward control.

 

[Smokeydog]

Your expectations of the little BX is high. Slow is better than digging by hand or stalling. Digga model? Auger size? I want to get one eventually.

 

[North Idaho Wolfman]

It might actually run reasonably well, BX23S has about 18-20 PTO HP @ 540.
What's unclear is the 'digga specs'. I assume those are maximum specs so less GPM/PSI will reduce speed and 'ease of penetration'. Obviously clay material requires more HP compared to 'sandy soil'.

It'd be nice to see the 'digga' hydraulic motor specs to make a reasonable guess on how well it'd work. Also needed are the specs for the PTO pump. They should include a chart of RPM vs PSI vs GPM.

General rule of thumb for oil is 2X the GPM, so if you run 10GPM, you'll need a 20 gallon tank. More is better and shape matters, The larger the surface area the better convection cooling you'll get.

As for on/off control...I'd think the 'digga' would come with a 'reverse-off-forward control.

It isn't going to work!