Which action should be taken after the tool is harnessed to the hydraulic lift arms?
- Lifting the tool a few times to maximum height in order to ensure that the tool is properly harnessed.
- Preventing vertical freedom of movement of the arms and of the tool.
- Correct answer: Preventing horizontal freedom of movement of the arms and of the tool.
- Securing the harnessed tool with special security chains.
Why this is the answer
The correct answer in the official bank: Preventing horizontal freedom of movement of the arms and of the tool.
After an implement is hitched to the tractor's lift arms, the sideways (horizontal) movement of the arms and implement must be locked, for example with stabilisers or check chains. An implement swaying from side to side can hit the rear wheels, drift out of the lane and upset the tractor's stability. Vertical movement must stay free, since it is used to raise and lower the implement and let it follow the ground.