Getting hydraulic drive info is like pulling hens teeth...

[Caveman]

Chris, thanks for response.... Max rpm is 3600, it is a 4 stroke 2 cylinder engine. It has 1" horz shaft. I have found the calculators for speed, size of tires, hyd flow, etc. I guess I could go for many different torques and setups of hyd motor sizes but I am asking for advice from you experienced guys on recommendations of pump/motor (hyd) sizes. Tires are 22" in dia, not sure of sprocket size but I think they are app 4" in dia. I know the hyd pumps displace small amounts and are kinda priced accordingly. I am thinking around .67 cu in displacement. Also, if anyone has expert knowledge of what type of hydraulics are in some of the better lawn mowers like golf courses use that I may salvage pumps/motors off of. I found new home type rider mowers with zero turn have little hydraulic/pump-motor combos that are independent and belt driven. So a belt drives two different hydraulic units. I don't want to use belts if I can get away from that. Thanks in advance for any advice you guys can give. I will keep build photos updated on this forum for all to see...
Caveman

[chris davison]

sorry I thought you were saying it was a two stroke. any way .67 disp. of pump x say 3000 rpm=2010 cu. in of oil divided by 231 cu. in. in a gallon =8.7 gallons per min. That will give you 4.35 gallons per minute per side. With 22 inch tires if my calcs are correct you will need 152.86 axle shaft rpm to do 10 mph. 1 inch shafts are pretty standard for hyd. pumps. Gates poly chain is a belt and it is stronger than metal chain. give me a tooth count on the axle shafts sprockets and what size chain is it?

[Caveman]

I will count teeth today. As far as I know, it still has the stock wheel sprockets on it. The engine has a 1" shaft on it and I was going to use same size on hydraulic pump. Hydraulic motors, not sure what size the shaft will be but pretty sure it will be around 1" from what I am finding on internet. I am not too sure on what hydraulic motors to use, that is my hold up right now. Once I find the right specs, I will go and find either new or used parts for this. I have the hydraulic tank and hoses but not the valves, pump and motors.

Thanks

Caveman

[a1shiva]

Cheapest way to go is to find a Trackster transmission. It is already set up with matching pumps and motors. It is an easy hook up to your motor. As long as your tub is wide enough for it to fit you should be able to put some gears on the ends where the drive sprockets were to connect to your chains. I put one in an Argo with 16hp. It was slow but sure steered nice. Try to find a Trackster with a bad motor or tracks as they go fairly cheap. That way you have all the controls, lines, cooler etc. All that stuff adds up fast.

[a1shiva]

How is the pump or drive connected to the engine? I recently bought a Wilderness Renegade. It has an electric clutch made by Warner? that lets me start the engine and warm it up and then flip a switch to engage the hydraulics. Even belt drive would be good as you could over size the belts and use a tensioner.

[chris davison]

Ive looked at warner clutches for my rig as I have used them before they work great but are very pricey havent seen very many on the used circuit thats why I bought an air clutch no coil to burn out.