(1) Point the suction hose towards the waste storage pool.

(2) Pull the four-way valve's rear handle parallel to the ground, then open the anti-overfill valve, aligning its handle with the pipeline axis.

(3) Shift the transmission to neutral, start the engine, disengage the clutch, and pull the power take-off switch backward to engage the power take-off. The vacuum pump will then begin to operate. Shift the transmission to neutral, start the engine, disengage the clutch, and pull the power take-off switch backward to engage the power take-off. The vacuum pump will start up.

Once the waste liquid in the drum has been fully discharged, the driver should promptly push the take-up lever forward to disengage, stopping the vacuum pump.

(5) Align the handle plate of the fuel tank spigot with the axis of the incoming fuel box parallel to close it. After flushing the rubber hose, place it back in the walkway box, close the side door, and position the hoist rod towards the top of the cabin.

(6) Remove the vacuum truck from the work site.