Operate a scraper

Planning for Work Activities and Preparing the Work Area

Before any scraper operation begins, a qualified operator must plan carefully and prepare the work area thoroughly. This module consequently equips learners with the skills to assess site conditions, interpret survey pegs and cut and fill instructions, identify hazards and develop a safe work plan for the scraper operation — ensuring that all work is carried out safely, efficiently and in full compliance with the OHS Act and Construction Regulations. Furthermore, learners will develop a working knowledge of workplace responsibilities — including employer responsibilities and employee responsibilities under the OHS Act. In addition, learners will learn about contributing factors that result in accidents, basic causes of accidents including personal factors and job factors, immediate causes of accidents including unsafe acts and unsafe conditions, general hazards on site, and health and environmental hazards. Furthermore, learners will develop the knowledge and practical skills to conduct comprehensive machine inspections — including the walk around inspection, pre-starting checks, pre-operating checks, operating checks and parking procedure. As a result, learners will be able to identify and report any defects or maintenance requirements before the machine is put into service.

Starting and Shutting Down the Scraper

A thorough pre-start inspection is the first line of defence against mechanical failure and operator injury. This module therefore equips learners with the knowledge and practical skills to conduct a comprehensive pre-start inspection of the scraper — verifying that all systems are fully operational and safe before the machine is started. Furthermore, learners will develop the practical skills to start the scraper safely and in accordance with the manufacturer’s specifications and site safety requirements — including cold engine start procedures, engine warm-up procedures and post-start operational checks. In addition, learners will understand the importance of avoiding intermittent revving and excessive idling — and how to interpret engine exhaust smoke colour as an indicator of machine health and maintenance requirements. This module also covers the correct shutdown and close-down procedures for the scraper — including safe parking on level ground, lowering the bowl to the ground, securing the machine on site, completing logbooks and other post-operation checklists, and reporting any defects or maintenance requirements identified during the work shift. As a result, learners will be able to hand over a safe, correctly parked and properly documented scraper at the end of every work shift.

Operating the Scraper

This is the core practical module of the course — covering the fundamental operating principles and hands-on skills required to operate a scraper safely and efficiently across a range of civil construction and mining applications. Learners will consequently develop a thorough understanding of scraper operating principles — including centre of gravity, machine stability, bowl loading principles, hydraulic system operation and tyre traction management. Furthermore, learners will develop practical skills across the full scraper operating cycle — including positioning for the cut, lowering the bowl and opening the apron for excavation, loading the bowl efficiently using push-loading techniques with a crawler tractor, closing the apron and raising the bowl for hauling, positioning at the spread area, opening the ejector for spreading and compacting material to the required grade and thickness. In addition, learners will learn how to manage difficult ground conditions — including soft ground, steep gradients, wet and slippery surfaces and uneven terrain — and adjust their operating technique accordingly. As a result, learners will develop the ability to identify and respond to all types of hazards on site — including stationary hazards, moving hazards, proximity hazards and ground hazards — using the system of vehicle control: identify, predict, decide and execute.

Transporting the Scraper To and From Site

Transporting a scraper to and from site requires careful planning and strict compliance with road traffic legislation and abnormal load permit requirements. This module therefore equips learners with the knowledge and practical skills to prepare the machine for transportation — including raising and securing the bowl, checking tyre pressures and ensuring that the machine is safely configured for loading onto the transport vehicle. Furthermore, learners will learn about the legal requirements governing the transportation of heavy construction plant on public roads in South Africa — including abnormal load permits, escort vehicle requirements, height and width restrictions and road traffic legislation. In addition, learners will develop the practical skills to safely load, secure and offload the scraper — including correct positioning on the lowbed trailer, tie-down and load securing procedures, and safety checks before departure. Finally, this module covers the safe offloading of the scraper from the transport vehicle and the correct positioning of the machine on site before earthmoving operations begin — ensuring that the machine is safely and correctly set up for the work ahead without risk to the operator, other workers or the public.