When should the tractor’s differential be locked?

1. When it is required to make a sharp turn on the spot while driving at a high speed.
2. When the tractor struggles to tow or pull a heavy weight tool.
3. When it is required to make a sharp turn on the spot while driving at a very slow speed.
4. Correct answer: When one wheel skids on the ground and the tractor cannot proceed.

WhyThe differential lock is engaged when one wheel slips and the tractor cannot move on.