Hydraulic auger On forklift

loudhornsrule · Feb 25, 2015

I have an old tractor with a huge forklift on the rear. Has a hydraulic pump ran off the front of the engine - crankshaft. I am wanting to build a big hydraulic auger on the forklift. I was told my hydraulic pump would run just about anything. I am not sure. Not really sure what motor I need. I would prefer a motor with a t least a 1 1/2'' straight shaft-no splines. Any help would be appreciated.

J_J · Feb 25, 2015

If you knew the GPM and pressure rating it would help some.

If you had a 10 cu in motor, and 12 GPM the motor would turn at 277 rpm.

--------------20---------------------------------------------------------139 rpm.

10 cu in , and 3000 psi = 4,777 in lbs of torque.

20------------------------= 9,554 ---------torque

This motor could work.

11.95 cu in CHARLYNN HYD PTO DRIVE MOTOR

21.05 cu in DYNAMIC BMER-1-350-WS-T4 WHEEL MOTOR

loudhornsrule · Feb 27, 2015

Yeah, I am not sure. I bet my gpm is less than 10. I just need a big motor lowspeed, and high torque. Not sure which motor to buy.

Fallon · Feb 27, 2015

Does the forklift have down pressure or is it gravity down? You might be a bit disappointed without down pressure. Although it probably wouldn't be hard to put some weight on the forks & sort that out.

J_J · Feb 27, 2015

loudhornsrule said:
Yeah, I am not sure. I bet my gpm is less than 10. I just need a big motor lowspeed, and high torque. Not sure which motor to buy.

Get the largest hyd motor you can afford, and one that can be adapted to the auger shaft. .

The torque on a good hyd motor is constant through the rpm range.

Rpm range somewhere between 50 and 150.

10 GPM into a 22 cu in hyd motor will turn it about 105, and torque of 8,758 in lbs..

Here is a hyd auger that one of the PT owners made .

It is a wheel motor adapted to whatever that is.

J_J · Feb 27, 2015

This auger from Land Pride is an 8 cu in hyd motor and requires about 10 GPM.

HD25 Series Post Hole Diggers | Land Pride

8 cu in and 2500 psi = 3185 in lbs of torque, and 10 GPM = 289 rpm max.

You can run this auger at any rpm.

loudhornsrule · Feb 28, 2015

103-1036-012 char lynn is the motor I ordered. Really not sure if it will work. I will try it , and see. No downforce on forklift, but I can put 4000 pounds of weight on it. thanks guys

J_J · Feb 28, 2015

Did you look at the specs on that motor, and if not, here it is.

https://shopcross.com/product/char-lynn-103-1036-012-lsht-geroler-hydraulic-motor-343-rpm-15-gpm

It would not be my choice for an auger motor. 3,058 in lbs of torque, 254 ft lbs.

loudhornsrule · Feb 28, 2015

JJ, the reason I ordered was because someone on here said they used one. Will it be too slow. too fast, or just be gutless with a big auger? I can always send it back, and get a different one. I appreciate the info guys. Thanks JJ I know you know hydraulics

J_J · Feb 28, 2015

Hyd motors will work or turn with just about any flow, and provide theoretical full torque.

The GPM will regulate the speed .rpm.

The torque is what you want to pay attention to, and that is the working force.

Some hyd augers might work very well in sandy soil like here in Florida, but fail miserably in different landscape, like shale or rocks.

With topography like that, you need all the torque and the right bit to dig holes.

The highest ft lbs you can obtain for the money is what you want.

If you take your motor and run it through a gear box with 3 : 1 ratio, you will reduce the speed to 1/3, and triple the torque.

Or

Order a new larger cu in motor with your GPM in mind.

Recommend you go here and enter some data and look at the result.

Surplus Center

Now select [ Hydraulic calculators ] , then select [ motor speed and torque ].

Enter whatever data you are searching for and it will help you in some more hyd knowledge.

What kind of valve will you use to control the auger speed?