How Bobcat's Hydrostatic Drive Actually Steers a Skid Steer

There's no steering wheel in a Bobcat skid steer or compact track loader, and no mechanical link at all between the operator's hands and which way the machine turns. Every ounce of steering happens through hydraulic oil. Most operators run these machines for years without ever thinking through how that actually works, which is a shame, because understanding the hydrostatic drive underneath a machine like the Bobcat T76-2 explains a lot about why these machines behave the way they do — and why "skid steer" is a more literal name than most people realize.

Two Pumps, Two Motors, No Mechanical Link

A hydrostatic drive system runs two completely independent hydraulic circuits, one per side of the machine. Each circuit has its own variable-displacement pump, driven directly off the engine, feeding its own dedicated drive motor on that side's wheels or track sprocket. There's no differential, no transmission, and no gearbox connecting the left and right sides mechanically at all. When you push the joystick forward, you're not pulling a cable or moving a linkage — you're telling each pump how much oil to send to its motor, and in which direction. Push both sticks (or one ISO joystick) evenly forward and both sides get equal flow, so the machine drives straight. Push more to one side than the other, and that side's track or wheels spin faster, which is what turns the machine.

Zero-Radius Turns Come From Running the Pumps in Opposite Directions

The party trick every hydrostatic machine can do that a wheeled vehicle with a differential can't: spin in place. Send one side's pump flow forward and the other side's pump flow in reverse, at equal rates, and the two tracks or wheel pairs drive in opposite directions at the same speed. The machine rotates around a point at its own center rather than swinging around like a car turning a corner. That's not a software trick or a special mode — it's a direct, physical consequence of having two independently controllable hydraulic circuits instead of one engine driving both sides through a shared differential. It's also exactly why these machines are so useful on tight urban lots, inside foundations, and in demolition work where a wheeled loader with a fixed turning radius simply can't operate.

Why It's Actually Called a "Skid" Steer

On a wheeled machine like the Bobcat S76-2, all four wheels are fixed — none of them pivot the way a car's front wheels do. Turning happens purely through that same speed differential between the left and right sides, which means the wheels on the slower side are being dragged sideways across the ground rather than rolled and steered into the turn. That sideways drag is where the name comes from: the tires genuinely skid across the surface every time the machine turns, and it's also why skid steer tires wear faster than almost any other equipment category, particularly on abrasive surfaces like concrete or asphalt. A compact track loader like the T76-2 does the same thing mechanically, but the rubber track's larger contact patch and pivoting action distribute that scrubbing force very differently than four small tire contact patches do, which is a real part of why tracked machines hold up better on hard, abrasive surfaces even though the underlying steering physics are identical.

The Real Trade-Offs Nobody Puts on the Spec Sheet

Hydrostatic drive isn't free performance. Every watt of power moving through a hydraulic circuit generates heat, and heat is the enemy of hydraulic oil, seals, and pump life. That's why compact track loaders and skid steers run dedicated hydraulic coolers and, on higher-output machines, reversible cooling fans that periodically blow debris back out of the cooler core rather than just packing it in tighter. It's also why hydraulic fluid condition and filter changes matter more on these machines than a lot of owners realize — contaminated fluid in a hydrostatic circuit doesn't just reduce efficiency, it accelerates wear on precision-machined pump and motor components that are expensive to replace. Compared to a mechanical or torque-converter drivetrain, a hydrostatic system also loses some raw efficiency to that heat, but it buys back infinitely variable speed control, true zero-radius turning, and the ability to run drive and attachment hydraulics off separate, purpose-built circuits — trade-offs most manufacturers, Bobcat included, have decided are well worth making for this class of machine.

Who Actually Benefits From Zero-Radius Steering

The trades that lean hardest on true zero-radius turning are demolition crews working inside a building footprint or a confined lot line, site-development contractors moving material in tight residential infill, and excavation crews backfilling around foundations where a wide turning radius simply isn't an option. For those trades, the hydrostatic steering system isn't a technical curiosity, it's the specific reason the machine can do the job at all in a space a wheeled loader or a mini excavator with a fixed swing radius can't touch. Roofers and GCs running a skid steer mainly for material handling around an open lot feel the benefit less acutely, but even there, the tighter turning envelope translates into fewer repositioning moves per pallet moved, which adds up over a full day.

Why Owning One Protects the Investment That Matters Most

This is also where the rent-vs-own case gets a little more specific than it usually does. A hydrostatic drive system is only as good as the fluid, filters, and cooler core behind it, and a rental machine run by a rotating cast of different operators across different jobsites rarely gets that maintenance discipline. Contamination from a poorly sealed quick-attach coupling, a missed filter interval, or a cooler core packed with debris doesn't show up as a breakdown immediately, it shows up as reduced pump and motor life two or three years down the road, on a machine you never owned and have no way to track the history of. A contractor who owns the machine controls that maintenance schedule directly, which protects the single most expensive system on the machine to repair, and it's a real, if less obvious, part of the financial case for financing your own equipment instead of running rental iron with an unknown maintenance history.

Why This Matters When You're Comparing Machines

Every compact track loader and skid steer BFC finances, whether it's a Bobcat, CAT, or another brand, uses some version of this same hydrostatic architecture, so the real differences between models come down to pump sizing, motor efficiency, and how much auxiliary flow is left over for attachments once drive power is accounted for — which is exactly the question we walked through in our breakdown of standard flow versus high flow hydraulics. If you're deciding between a wheeled Bobcat T76-2 and a tracked machine, the steering physics explained here are a big part of why tracked machines cost more up front but hold up better on hard surfaces, a trade-off we also break down in what rubber track wear actually adds to ownership costs. And if you're weighing Bobcat against another brand entirely, our Bobcat vs. CAT skid steer comparison is worth reading next.

Ready to Put This to Work?

Renting by the week or the month works until it doesn't — every dollar you hand back to a rental yard is gone for good, while the machine you actually need to own keeps making someone else's payment. BFC Equipment Loans structures financing built around how contractors actually grow, so you can fund your next piece of equipment while the last one is still paying for itself. Head back to our home page to see how we work, browse current equipment for sale and financing options, or go straight to our equipment financing application to get real numbers for your business. And if you want more breakdowns like this one in your inbox, subscribe to get new posts like this from the BFC blog.