New holland LS170 and posthole borer

[Greatsages]

Hi guys ...I have a New Holland LS170 and I am wondering if it
Will run a post hole borer or will I have to fit a high flow pump to it.
At the moment it just runs my 4 in one bucket. Thanks

 

[RickB]

I have a customer with a MacMillen PHD intended for SSL mount. He has run it for at least a decade on a New Holland TC35D tractor (about 8 GPM) with success.

 

[J_J]

It is not the GPM's that matter so much.

GPM's determine speed.

It is the pressure that the hyd motor can develop.

More displacement in cu in, the more torque.

10 cu in motor at 2500 psi will develop about 331 ft lbs

20 ---------------------------------------------663------

And so on and so on.

 

[RickB]

It is not the GPM's that matter so much.

GPM's determine speed.

It is the pressure that the hyd motor can develop.

More displacement in cu in, the more torque.

10 cu in motor at 2500 psi will develop about 331 ft lbs

20 ---------------------------------------------663------

And so on and so on.

That's true, but the 663 lb/ft of torque is developed at exactly half the speed of your 331 lb/ft example at a given flow rate. That's when GPM's matter. Just about any tractor or SSL will generate 2000-2750 psi at the remote coupler. The important thing is to match the PHD's orbit motor flow requirements to the power supply's available pump flow to create an acceptable operating speed for the auger. Saying GPM's don't matter much is inaccurate, as any PHD specified for high flow supplies will perform poorly on standard flow machines, which fact speaks directly to the OP's question.

 

[J_J]

Sure, more GPM will produce more motor speed, but the torque will be the same because it is based on the cu in and the pressure.

Look at some of the larger augers, and they will turn about 50 to 100 rpm.

However if you add a planetary gear, to the above hyd torque, you come up with an increase in torque developed by the gear ratio of 5:1 of about 3315 ft lbs which is very good.

Would you rather have the rpm or the torque?

My 24 in auger does not turn very fast and I am feeding it about 13 GPM.

That gives me about 995 ft lbs. in my sandy soil, and that is plenty.

In rocks and clay, you will need more torque.

The auger will turn at almost any hyd flow, but if you don't have the torque, it will stall.

This is what he has. LS170

Hydraulic
PUMP TYPE New Holland double acting
PUMP FLOW CAPACITY 24.5 gal/min 92.7 L/min
RELIEF VALVE PRESSURE 2600 psi 17926.4 kPa

So if he had a direct hyd powered auger and knows the cu in. one can figure the torque and the rpm. If the auger has a planetary gear , then the gear ratio should be computed.

 

[Greatsages]

Sure, more GPM will produce more motor speed, but the torque will be the same because it is based on the cu in and the pressure.

Look at some of the larger augers, and they will turn about 50 to 100 rpm.

However if you add a planetary gear, to the above hyd torque, you come up with an increase in torque developed by the gear ratio of 5:1 of about 3315 ft lbs which is very good.

Would you rather have the rpm or the torque?

My 24 in auger does not turn very fast and I am feeding it about 13 GPM.

That gives me about 995 ft lbs. in my sandy soil, and that is plenty.

In rocks and clay, you will need more torque.

The auger will turn at almost any hyd flow, but if you don't have the torque, it will stall.

This is what he has. LS170

Hydraulic
PUMP TYPE New Holland double acting
PUMP FLOW CAPACITY 24.5 gal/min 92.7 L/min
RELIEF VALVE PRESSURE 2600 psi 17926.4 kPa

So if he had a direct hyd powered auger and knows the cu in. one can figure the torque and the rpm. If the auger has a planetary gear , then the gear ratio should be computed.

Having trouble working out where to reply . But I have to thank you guys for all the info .
You have answer all my worries and have now the know how to search for the right PHB ..
Ground here as hard as .....well rocks. Hopefully Ill find the right PHB and Ill be able to hide that heavy crow bar in the gully for good . Thanks again...

 

[RickB]

Sure, more GPM will produce more motor speed, but the torque will be the same because it is based on the cu in and the pressure.

Look at some of the larger augers, and they will turn about 50 to 100 rpm.

However if you add a planetary gear, to the above hyd torque, you come up with an increase in torque developed by the gear ratio of 5:1 of about 3315 ft lbs which is very good.

Would you rather have the rpm or the torque?

My 24 in auger does not turn very fast and I am feeding it about 13 GPM.

That gives me about 995 ft lbs. in my sandy soil, and that is plenty.

In rocks and clay, you will need more torque.

The auger will turn at almost any hyd flow, but if you don't have the torque, it will stall.

This is what he has. LS170

Hydraulic
PUMP TYPE New Holland double acting
PUMP FLOW CAPACITY 24.5 gal/min 92.7 L/min
RELIEF VALVE PRESSURE 2600 psi 17926.4 kPa

So if he had a direct hyd powered auger and knows the cu in. one can figure the torque and the rpm. If the auger has a planetary gear , then the gear ratio should be computed.

You gotta get away from the computer and get out in the real world. A standard flow LS170 doesn't have anywhere near 24 GPM flow at the aux couplers.

 

[J_J]

RickB,

Whatever.

New Holland*LS170*Skid Steer Loader

I hope you don't think I am going out in the real world and look at ever tractor and do a flow and pressure test.

My Case 1845c has about 19 GPM, and it is about 15 yr old.

If you really know the correct flow, then state the flow and provide a reference.

http://agriculture.newholland.com/u...id-Steer-Loaders/Pages/products_techinfo.aspx

standard flow =17.2 GPM

Hi-flow = 30.3 GPM

Did I get it right

I am sorry I messed up, but I am 74 yr old.

What is your excuse?

 

[EverythingAttachments]

That was a mistake that anyone could have easily made, JJ. I think you know more about hydraulics than most, by far!

Like you said, Ritchie specs, which I use a lot, only shows 24.5gpm, but, according to the NH brochure for the LS170, the 24.5 is for optional high flow. It shows std. flow to be 17.7.

If i'm selling an auger drive and the customer is unsure of the flow, I try to help determine what it is, but it's best to know for sure.
Travis