D

Axle lock improving traction for sweepers on gradients or wet verges.

Access door for clearing blockages near suction mouth.

Auxiliary cooler installed on heavy twin-axle sweepers. Keeps rear differential oil below safe temperature during prolonged low-speed operation.

Mesh guard protecting workers during hopper tip.

Controls burner/heat flow to maintain bitumen at target temperature.

Rubber skirt around suction head maintaining seal and preventing throw‑out.

Water hardness/cleanliness affecting emulsion stability during spraying.

Electric or hydraulic actuator opening the debris gate between nozzle and hopper. Allows instant blockage clearing from the cab.

Transparent inspection window on hopper side. Allows the operator to check fill level without opening doors or interrupting suction.

Spiral auger that moves collected material from pickup head to hopper inlet. Maintains flow even when sweeping heavy wet grit.