What is the primary purpose of engaging the differential lock on a grader?

Engaging the differential lock on a grader primarily serves to increase traction. This mechanism is crucial when operating in challenging conditions such as muddy, uneven, or slippery surfaces, where one wheel may lose traction while the other remains stable. By locking the differential, both wheels on the axle are mechanically linked, allowing them to turn at the same rate. This ensures that power is distributed evenly to both wheels, preventing one from spinning out while the other has grip. As a result, the grader can maintain movement and stability, allowing for more efficient grading and maneuvering in difficult terrains.

In contrast, while engaging the differential lock may have effects on engine load and blade stability, these are not its primary functions. It is designed specifically to enhance traction—making it easier for the operator to navigate tough surfaces and improve the overall effectiveness of the grading process.