Why should operating a wheel loader on a slope with a loaded bucket be avoided?

• A. It reduces braking efficiency.
• B. It is safer to travel diagonally across the slope.
• C. It increases tipping risk; travel straight up or down with the load kept low.
• D. It has no effect on stability.

Answer: (C)

Stability on a slope with a loaded bucket is the key factor. When the bucket is loaded, the weight is concentrated at the front and higher up, which raises the center of gravity and creates a forward tipping moment as gravity tries to pull the machine downhill. That makes tipping over much more likely on slope pavement.

Keeping the load low lowers the center of gravity, reducing that tipping tendency and making the machine easier to control on the slope. Traveling straight up or straight down minimizes the lateral forces and tipping moments caused by gravity along the slope, whereas moving diagonally across the slope introduces a side-to-side component of instability that can lead to a rollover, especially with a load.

So the safest practice is to keep the bucket low and move directly up or down the slope with the load, rather than crossing the slope or keeping the bucket elevated. While loading can affect braking, the main hazard here is the increased tipping risk; saying there’s no effect on stability isn’t accurate.