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High-volume wash to clear heavy slurry from gutters.

Document proving that the sprayer’s flow meters have been verified against a national standard. Required for most local authority surfacing contracts.

Tap allowing drainage of trapped water from filter housings. Prevents corrosion and microbial growth in standing liquid.

Chart used to set nozzle pressure for target rates.

Electronic counter tracking hours since last filter change. Prompts operators when routine service is due to maintain suction efficiency.

Measures binder mass flow to maintain target litres/m² at varying speed.

Gauge displaying pressure difference across filter elements. Indicates when filters are blocked and need replacement.

Calibration test comparing measured flow to controller target. Required before major surface-dressing projects to verify accuracy of binder delivery.

Sensor monitoring vibration to predict bearing wear.

Matched set of V-belts transferring power from the auxiliary engine to the main fan. Must be replaced in pairs to maintain tension balance.