Safe Starting, Moving, Steering and Stopping Procedures
What this domain tests
The start-up sequence, how an articulated machine actually tracks and swings, and how to stop and park so the machine stays where you left it.
Starting and moving off
Complete the pre-start checks, adjust the seat and mirrors, fasten the belt, confirm the body is fully down and the park brake is on. Walk round or use the camera to confirm no one is near, sound the horn, start the engine and let it warm. Check gauges and warning lights, then test the brakes. Select the range you need, release the park brake, and move off smoothly - harsh acceleration spills load and shocks the driveline. Keep to site speed limits and look well ahead on haul roads.
Steering characteristics
Because the machine articulates at the centre, the rear wheels track inside the front wheels in a turn. On a tight bend the rear body can clip kerbs, barriers, stockpiles or pedestrians who assumed the rear would follow the front. When turning near a stockpile, remember the rear body also swings out. Learn the machine's turning circle and tail swing in an open area before working in confined space.
Stopping and parking
Plan the stop, check mirrors and camera, and brake progressively. On a descent, select a low range before the slope and use the retarder to hold speed rather than riding the service brake. Never coast in neutral. To park: level firm ground, body fully down, transmission in neutral, park brake applied, engine off, key removed. On a slope, chock the wheels and avoid the situation in future.
Worked example
You turn right into a narrow haul road with a barrier on the left. Because the rear wheels track inside, the left rear corner of the body swings towards the barrier. You swing wide before the turn, keep the rear in your mirror and keep speed low so a pedestrian stepping out has time to react.
Traps
- Travelling with the body raised - the centre of gravity rises and overhead clearance shrinks.
- Selecting a low gear after starting the descent instead of before.
- Parking on a slope with only the park brake.