Hi all,
New to site and I was wondering if anyone can help with the following dilema?
I have recently purchased a second hand hydraulic snow blower for attaching to JCB high flow skid steer which runs at 25gal/min at 2683 psi, (I will have to confirm psi) running 3/4 flat faced couplings.
The snow blower has no motor and my knowledge of hydralics is very limited hence my problem.
From where the motor is ment to sit it is all chain driven /- from motor to 19 tooth sprocket which has a 11 tooth sprocket on the inside of shaft which is chained to 22 tooth sprocket running fan impella. The shaft that holds the 19 and 11 tooth sprockets goes into a directional drive box changing drive 90 degrees wich runs a 20 tooth sprocket to front of auger which has a 60 tooth sprocket.
What I am hoping to acheive is to have the blower setup so I can reverse the flow from inside skid steer, if it gets blocked.
I hope the information I have provide is understandable and of assistance, any help would be most grateful.
Cheers Robert

You do not provide enough information to even begin to size Hydraulic Motors for your application.

You must sepcify and RPM and a Torque figure for each system before anyone can be of any real help.

I would be contacting the manufacturer to see if they can supply a part # for the motors or at least give figures for the above inputs.

With the setup you indicate you will need a Flow DIvider to cause each circuit to operate together or independently.

A simple Open Center 4-Way Directional control valve would allow starting, stopping and reversing flow.

What you are asking for is not something a Forum like this can readily answer.

Thanks for your reply Bud,

I will get the rpm and torque figures, and I will look into the 4-way Directional valve.

Thanks again

Hi,
I believe a motor around the 9.8 cubic inch size is desirable and are still trying to obtain data on rpm and torque figures.
I have been told a electronic spool valve is the way to go for directing flow and should enable me to stop flow, aswell as reverse the flow to motor.
Would this be able to control the speed of flow, as I am hoping to be able to control operation from insided the cab with some type of soft start operation, adjustable speed control along with forward and reversing flow control.
I also wish to install some type of pressure release valve to shut down system if the blower jams with picking up debris to elliminate damage.
If anyone has any thoughts on aheiveing this I would be most greatful.

Cheers Rob

A 9.8 cir Hydraulic Motor supplied by a 25 GPM pump would rotate 25 X 231/9.8= 589 RPM max with no pump, valve or motor bypass. Roughly 500 RPM at 85% efficiency.

Does that sound like a reasonable speed with the sprocket ratios you have?

The 4-Way valve I referred to would be best suited to directional control. It could give flow control but would be restricting flow to do that and forcing excess pump flow across the relief valve at maximum system pressure. Could warm up the system rather quickly.

A solenoid operated 4-Way could allow for remote control but it would be on, off or stop one direction or the other. A proportional 4-Way could give variable flow remotely, electronically but that seems a little much for your setup.

A relief valve set at a safe pressure would allow the Blower to stop if pressure excedes relief setting but wold have the motor at full torque when it did.

As stated before what you are attempting is more than anyone can help you with in a safe manner in a forum like this.

Is there a Tech School near you. This could be a project for their mechanical students and allow them to get hands on experience while guided by an instructor with the skills or from someone he knows with the skill.

Thanks Bud,
I have taken you advice and contacted the Tafe collage, as I'm sure it would be an interesting task.

Cheers Robert