CSCS 180° Excavator cheat sheet

A 180° excavator is a wheeled or tracked machine whose upper structure slews within 180°, so it cannot fully rotate; the working area is a partial arc and the operator must plan for blind spots behind the machine.

The machine's stability is governed by its centre of gravity inside the footprint; a 180° machine is more stable than a full-slew machine but overturns when the bucket is overreached on soft ground or side slopes.

Exclusion zones: keep all personnel at least the machine's working radius plus a margin clear; the bucket/attachment swing arc and the area behind the machine are the highest-risk zones.

Overhead line safety: treat any line as live unless the network operator confirms isolation; the machine's height plus boom reach must be checked against line heights before work.

Daily pre-use inspection and defect reporting are legal duties under LOLER/PUWER-type regimes; defects affecting safety must be reported and the machine taken out of service.

Environmental controls: bunded fuel storage, drip trays under the machine, spill kits on site, and no washing of the machine near watercourses; hydraulic oil is a pollutant.

PPE baseline for excavator operation: hard hat, hi-vis, safety boots, and eye/ear protection as the site risk assessment requires; seat belt must be worn while operating.

If the machine contacts a live cable, the operator should stay in the cab and warn others away; leaving the cab is a last resort and requires jumping clear with feet together.

Walk-around check covers: tracks/tyres and pressures, bucket teeth and pins, hydraulic hoses for chafing/leaks, boom and dipper for cracks, and the slew ring and its bolts.

Fluid checks before start: engine oil, coolant, hydraulic oil level (with the machine level and attachment lowered), fuel, and battery condition; top up only with the engine off.

Cab checks: seat and seat belt condition, mirrors and mirrors' adjustment, wipers, horn, beacon, and all gauges and warning lamps function on start-up.

Controls configuration: confirm the pattern (e.g. ISO vs SAE) matches the operator's competence; a machine configured to a different pattern is a hazard.

Safety devices: check the ROPS/FOPS structure for damage, the reversing alarm, and any quick-hitch locking pin - a failed quick-hitch lock is a fatal-risk defect.

Track tension or tyre condition affects steering and stability; check for missing track pads, damaged grousers, or tyre cuts before travel.

Record the pre-use inspection; any defect that affects safe operation must be reported and the machine locked out until rectified.

Travel with the bucket or attachment lowered close to the ground (typically 200-400 mm), boom retracted, and the machine at low speed; this lowers the centre of gravity.

On slopes, travel straight up or down, never across the slope; keep the heavier end of the machine uphill where possible and the bucket on the downhill side for a quick reaction.

Use a banksman when reversing, when visibility is restricted, or when working near people, edges, or overhead hazards; agree signals before moving.

Ground bearing capacity must be checked before travel: soft ground, made ground, or edges of excavations can collapse under the machine's weight.

Keep clear of excavation edges by at least the depth of the excavation (or a designed stand-off); spoil heaps add load and must not be placed at the edge.

When positioning to excavate, set up level, with the tracks/tyres square to the work face, outriggers (if fitted) deployed, and the machine able to slew through its 180° arc without striking anything.

Check overhead and underground services before positioning; use cable-avoidance tools and the service plans, and mark the exclusion zone on the ground.

Dig with the bucket curled and the dipper drawn toward the machine; do not use the bucket as a battering ram or side-swing it into the trench wall.

Never lift loads with the bucket or with a machine not rated and configured for lifting; a 180° excavator is a lifting machine only when fitted with a certified lifting point and a rated capacity indicator.

When lifting, the load must be within the rated capacity at that radius, the machine level, the slew within its 180° arc, and a banksman controlling the load.

Spoil placement: keep the spoil heap back from the trench edge, typically at least 1 m clear of the edge and never surcharging the side wall.

Trench digging: batter or support the sides per the risk assessment; the operator must not enter an unsupported trench and must stop if the sides show signs of collapse.

Slew and travel controls should be operated smoothly; abrupt stops with a loaded bucket cause load swing, shock loads on the hydraulics and loss of stability.

Placing loads: lower slowly, keep hands and feet clear, and never place a load where the operator cannot see the landing point - use a banksman or reposition.

Park on level, firm ground; if a slope is unavoidable, chock the wheels/tracks and position the machine so it cannot roll.

Lower the bucket and any attachment to the ground, retract the boom/dipper to a stable transport position, and apply the parking brake.

Neutralise the controls, switch off the engine, remove the key, and isolate the battery master switch where fitted; this prevents unauthorised use.

Lock the cab, remove the key to a secure location, and fit any anti-theft devices; report the machine's location and status.

Post-operational walk-around: check for new leaks, damaged hoses, loose pins, and track/tyre damage; report defects found after use.

Refuel only with the engine off and in a designated bunded area; clean up spills and dispose of contaminated materials correctly.

Complete the end-of-shift record: hours, fuel, defects, and any incidents; hand over verbally to the next operator where applicable.