What is the function of the differential unit on a TLB?

The differential unit on a Tractor-Loader-Backhoe (TLB) serves the important function of distributing power to the drive wheels. It allows the wheels to rotate at different speeds, which is especially beneficial when turning. This enables the vehicle to navigate smoothly around corners without dragging or skidding, improving maneuverability and overall handling in various driving conditions. Properly functioning differential units contribute significantly to the efficiency and stability of the TLB on uneven terrain, making it a crucial component for effective operation.

In the context of the other options, controlling engine speed relates to the engine and throttle system rather than the drive mechanism, while regulating hydraulic pressure is associated with the hydraulic system that powers attachments, and increasing fuel efficiency relates more to engine performance than to the function of the differential. These other functions play important roles, but they do not pertain directly to the specific role of the differential unit in the TLB's drive system.