hydrolic drive motors

[azz7772]

hi all........ i would like to say i am at the beginning of my learning curve on hydrolics, and i would like to start with a discussion about what do you all think would be the best hydrolic motors that can be used for each individual wheel and how would a person hook them up in series to work at the same speed? also what is the fastest speed a person could get out of them do you all think?

[Beeman]

It would be cheaper to go with two hydraulic motors and then chains but if you want to run 3 motors on either side than daisy chain them (just like a series circuit in electrical).

[mudbug3]

Hydrolic drive motors

My friend and I have also been talking about a hydrolic drive system on a custom built amphib. I really like the build quality on the Hydro Traxx,,but its so wide. With an amphib this wide, you could only drive it on trails made for jeeps,open swamps, and open fields, not most 4-wheeler trails like I do now, with my Max IV.

I would like to use the new Briggs 35 Hp motor that Hydro Traxx is using in their base line model, in an amphib the size of a Max IV or Argo Frontier.

Hydrolic wheel motors are big, take up a lot of space, are farily heavy, and would also need a lot of side support to the body, where they mount up. But even if I was limited to only one seat directly behind the other, on a custom built amphib, that was just built wide enough to fit through most 4-wheelers trails,,that would be fine with me.

I love having the ability to drive foward or drive in reverse, and then slam one stick forward,and one stick in reverse, at the very same time,,and not have to skid steer to change directions. I,ve found myself in a lot of tricky trail situations where this feature would have come in quite handy.

[azz7772]

what do you all think of this idea i am thinking a heavyduty aluminum body with the hydraulic motors on the outside with an adjustable coil over shock for suspension also a skid plate could be added to protect the motors ...........i know it is not a refined idea like where to run hydraulic lines ect.like i said this is a brain storming thread if anyone has any input or ideas please share also i was thinking why do all the amphibs have such a flat front on them would it not make more sense to have a bit of a point on the front like a boat? That way it would be more efficient in the water

[Mike]

I really think you would be better mounting them inside of the tub. Not only for the plumbing issues that you would have but also for rigidity. One main frame for all six (or two with chains).

With the hydros, they have advanced enough over the past several years to where you could get comparable speed to a Max. Of course you could always gear it up and you could even design any size tire to fit since you are custom building the tub.

Keep us updated on what you decide to do.

[jerseybigfoot]

Going Hydrostatic is expensive and adds considerable weight. Motors in series is easy to synchronize the speed but creates some design issues. Unless you go with chains. do your research on the motors before you decide on the pump. High torque wheel motors are rpm and pressure limited. To get the maximum gear ratio you need high pressure motors. Lower pressure wheel motors will require a higher displacement and end up with a lower permitted max speed. A new t-20 is cheaper and will also do a 0 radius turn. Here is your calculation for vehicles. Hydraulic Tutorials

[steved]

hydraulic design

hi folks thought i would add my comments on this .I have been designing for a while a hydraulically driven vehicle 1) hull approx 5.5 feet wide 10 ft long made out of n8 marine alloy with main side channels along entire length of 6mm x100x200mm to this would be attached hydrotraxx motors 8 in all the vehicle would be braced with 2 or 3 cross beams on top of the side rails with gussets for strenth using 28 inch tryes ground clearence would be 12.5 inches under motors and 16 to 18 under centre 2)propulsion kubota t1505t engine driving hydrotrax pump etc all similiar to hydrtraxx all proven and working water drive by water jets 1 each side hydro powered drawing water in from side of hull beneath water level wheelbase approx 87 inches what do u reckon steve

[brushcutter]

In my opinion hydraulics are best used for heavy duty applications,industrial type stuff.I have for some time thought of a machine that a hydro drive with the motors on a cantilevered pivoting arm and linked together on each side.Add a hydraulic cylinder to the front of this and when the machine got grounded you could hit a valve and the wheels would swing down and in effect lift the tub allowing it to be driven out.So I asked the guy at my local mower shop about the motors on a dixie chopper ztr mower and he said "just off the top of my head they would pull one tire with no problem".But when I asked about price he said somewhere between $1000 and $1600 each.That didn,t stop me from thinking about it but it sure did put it WAY WAY back on my starting soon list!

[Moallen]

Hey I have a idea

Just buy a Mudd OX Matt has done all the work for you.
Allen

[mudbug3]

Moallen ,

Yes, I agree with you. I,m sure a lot of trial and error went into the final design of the Mud-Ox before it hit production. I would also imagine the wheel motors on the Mud-Ox cost more than $1,800 a pop too.

[NERO]

Hydro Trans For 6x6

Have you though about a trackster transmission for a custom hydro 6x6
there driven horzoinal ,twin pump motor out put. ??
just a Idea .

[Matt O.]

Just buy a Mudd OX Matt has done all the work for you.
Allen

Hi,

After 3 years of testing I know Allen is right!!! And allot cheaper

Matt

hi all........ i would like to say i am at the beginning of my learning curve on hydrolics, and i would like to start with a discussion about what do you all think would be the best hydrolic motors that can be used for each individual wheel and how would a person hook them up in series to work at the same speed? also what is the fastest speed a person could get out of them do you all think?

If you need some help let me know. I have done alot of testing on this.

Matt

[Moallen]

Yes share the info

Yes, It is like the other site I belong (well alot of them) the guys share alot of info.Not saying we dont here because we do.
Allen

[Jeff t-boss]

I've been tossing around the idea of useing the pump and hydraulic motors from one of the newer industrial lawnmowers. Airens has one that has a (i think Kohler) 25hp motor, and when you hit the sticks fast and hard, it will actually lift the front end. However, my skeptecism comes in wondering if even that is enough to turn all 6 wheels in a neutral steer. I'm not really knowledgable in hydraulic "Math", so it would just be a stab in the dark for me. (And probably an expensive one at that)

By-the-way, Matt; nice job on the Mudd-OX. I bet we won't see that on ebay anytime soon. DEFINATELY A KEEPER!!! Is there a 6 wheel version?