You are loading excavated material into a dump truck using an excavator. What is the maximum height an operator should lift the bucket over the truck box before dumping (excluding necessary clearance for the truck bed)?

Question: You are loading excavated material into a dump truck using an excavator. What is the maximum height an operator should lift the bucket over the truck box before dumping (excluding necessary clearance for the truck bed)?

Answer options:

• As high as the machine allows for maximum visibility.
• Approximately 3 metres (10 feet) above the truck box. ✅ Only high enough to clear the truck's sideboards and ensure the material can be dumped safely into the bed.
• Depends on the type of material being loaded; higher for lighter materials.

Correct answer: Only high enough to clear the truck's sideboards and ensure the material can be dumped safely into the bed.

Explanation: Lifting the bucket higher than necessary to clear the truck box raises the machine's centre of gravity, increasing instability, and also increases the impact force when the material drops, which can damage the truck.