Can the high idle be activated from the switch in the cab when the unit is in pump?

The ability to activate high idle from a switch in the cab while the unit is in the pump mode is typically restricted to ensure safety and operational integrity. In pump operations, the engine must maintain optimal performance for effective water delivery, and engaging high idle could create unnecessary risks.

When the unit is engaged in pumping, the engine speed must be carefully controlled to maintain proper water pressure and avoid overtaxing the pump or the engine itself. Activating high idle during this time could lead to issues such as pressure surges or mechanical stress. Therefore, operating the high idle feature is typically restricted when the unit is in pump mode to prevent unintended consequences that could arise from changing engine speeds abruptly during crucial pumping operations.

This focus on maintaining stable engine performance and safety protocols is why the correct response indicates that high idle cannot be activated from the switch in the cab while the unit is in pump mode.