You are performing a pre-operational check on a wheel loader before moving it off a level concrete pad. When should the articulation lock be disengaged?

Question: You are performing a pre-operational check on a wheel loader before moving it off a level concrete pad. When should the articulation lock be disengaged?

Answer options: ✅ Only after the engine has started, the park brake is released, and before the loader begins to move.

• Before starting the engine, to allow for full steering range during the startup sequence.
• Immediately after the machine is shut down at the end of the shift.
• It should remain engaged during low-speed manoeuvres on even terrain.

Correct answer: Only after the engine has started, the park brake is released, and before the loader begins to move.

Explanation: The articulation lock should only be disengaged when the machine is ready to be operated and steering is required. Disengaging it too early poses a risk of crushing injuries if the machine's articulated frame unexpectedly shifts. OPSWA guidelines advise disengaging only when the machine is operational and steering is active, avoiding movement until it's released.