What must happen to all controls that affect movement when released?

When you release the controls that affect movement on equipment like booms and scissors, it's important that they return to the neutral position. This requirement is a safety precaution designed to ensure that if an operator accidentally lets go of the controls or becomes incapacitated, the equipment does not continue to move or function unexpectedly. Returning to neutral prevents unintentional activation of movements, which could lead to accidents or injuries.

Neutral positions provide a level of stability and control, ensuring that the machine is safely parked and that no further movements are initiated as a result of an operator's inadvertent actions. This standard is vital for maintaining a safe working environment when operating heavy machinery, reducing risks associated with hydraulic or electrical failures that might keep equipment in motion if controls were left in an active position.