CSCS 180° Excavator flashcards

32 cards. Read the term and the definition here. The deck at the top of this page is optional.

180° excavator slew limit

The upper structure rotates within a 180° arc only, so the machine cannot fully rotate; the operator must plan the work so the arc covers the dig and spoil positions.

Working radius exclusion zone

The area swept by the bucket and attachment plus a safety margin; all personnel must stay outside it unless authorised and in communication with the operator.

Overhead line approach distance

The minimum safe clearance from live overhead lines, set by the network operator; the machine's height plus boom reach must be checked against it before work.

Contact with live cable

If the machine contacts a live cable, stay in the cab, warn others away, and call for help; leaving is a last resort requiring a feet-together jump clear.

Spill kit purpose

A kit of absorbent materials and containment items kept on site to control hydraulic oil or fuel spills before they reach drains or watercourses.

Seat belt in excavator

The seat belt must be worn while operating; it restrains the operator in an overturn or sudden stop and is part of the machine's protective system.

ROPS and FOPS

Roll-over and falling-object protective structures fitted to the cab; they must be inspected for damage and never modified or drilled without approval.

Quick-hitch locking pin

The pin that secures the attachment to the quick hitch; a missing or failed pin allows the bucket to drop and is a fatal-risk defect.

Control pattern check

Confirm whether the machine is set to ISO or SAE excavator controls and that it matches the operator's competence before operating.

Hydraulic hose inspection

Check hoses for chafing, bulges, cracks and leaks during the walk-around; a pinhole leak can inject fluid under the skin and is a medical emergency.

Track tension check

Verify track tension to the manufacturer's specification; too slack risks derailment, too tight accelerates wear on pins and bushes.

Pre-use inspection record

A written record of the daily checks completed; defects affecting safety must be logged, reported, and the machine locked out until repaired.

Travel height of bucket

Carry the bucket or attachment low, typically 200-400 mm above ground, with the boom retracted to lower the centre of gravity.

Travelling on slopes

Travel straight up or down the slope, never across it; keep the heavier end uphill and the bucket on the downhill side for a quick reaction.

Banksman use

A trained signaller used when reversing, when visibility is restricted, or near people and edges; agree signals before any movement.

Ground bearing capacity

The load the ground can support; soft, made ground or excavation edges may collapse under the machine, so check before travelling or setting up.

Excavation edge stand-off

Keep the machine and spoil back from the excavation edge by at least the depth of the excavation, or by a designed distance from the risk assessment.

Set-up position for digging

Park level with tracks or tyres square to the work face, deploy outriggers if fitted, and confirm the 180° slew arc is clear of obstructions.

Underground service check

Before positioning, use service plans and cable-avoidance tools to locate buried services, then mark the exclusion zone on the ground.

Digging technique

Curl the bucket and draw the dipper toward the machine; do not ram with the bucket or side-swing it into trench walls.

Rated capacity at radius

The maximum load the machine can lift at a given radius; the load must be within it, with the machine level and the slew within its arc.

Lifting point certification

A 180° excavator may lift only when fitted with a certified lifting point and a rated capacity indicator, used with a banksman controlling the load.

Spoil heap set-back

Keep spoil at least about 1 m clear of the trench edge and never surcharge the side wall, as the added load can cause collapse.

Trench side support

Trench sides must be battered or supported per the risk assessment; the operator must not enter an unsupported trench and must stop if collapse signs appear.

Load swing control

Operate slew and travel smoothly; abrupt stops with a loaded bucket cause load swing, hydraulic shock loads and loss of stability.

Blind landing point

Never place a load where the operator cannot see the landing point; use a banksman or reposition the machine before lowering.

Parking on a slope

If a slope is unavoidable, chock the wheels or tracks and position the machine so it cannot roll; level firm ground is always preferred.

Shutdown attachment position

Lower the bucket and any attachment to the ground and retract the boom and dipper to a stable transport position before switching off.

Battery master switch

An isolation switch that disconnects the battery; turning it off at shutdown prevents unauthorised use and reduces fire risk.

Post-operational walk-around

An end-of-shift inspection for new leaks, damaged hoses, loose pins and track or tyre damage; defects found must be reported.

Refuelling rules

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

End-of-shift handover

A record and verbal handover covering hours, fuel, defects and incidents, so the next operator knows the machine's condition.