The parking brake may be the same brake as the service brake if it is mechanically spring loaded for automatic braking action in case of loss of power supply. Braking Systems for "Skid Steer" Wheel Mounted Drill Rigs For skid steer chassis the same rules as for crawler mounted drill rigs shall apply. Braking action shall be possible on all wheels. Protection Against Moving Parts General The moving parts of a drill rig shall be designed, built and laid out to avoid hazards. Transmission Parts Rotating transmission parts such as drive shafts, couplings, belt drives, which are within reach of personnel, shall be provided with guards to prevent contact. Guards shall be of robust construction and securely held in place. Fixed guards shall be used when access is rarely necessary and be held in position either by welding or by mounting them in such a way that they can be opened or removed only with the aid of tools or keys. When frequent access is required for service or maintenance purposes, moveable guards may be fitted. They shall fulfill the following requirements: Whenever possible they shall remain fixed to the machine when open. They shall be fitted with a system supporting them in the open position. Compartments containing internal combustion engines shall be lockable. Movable covers, preventing access to such compartments need to have locking devices to prevent unauthorized access. Drill Rigs with Rotating Superstructure
The parking brake may be the same brake as the service brake if it is mechanically spring loaded for automatic braking action in case of loss of power supply. Braking Systems for "Skid Steer" Wheel Mounted Drill Rigs For skid steer chassis the same rules as for crawler mounted drill rigs shall apply. Braking action shall be possible on all wheels. Protection Against Moving Parts General The moving parts of a drill rig shall be designed, built and laid out to avoid hazards. Transmission Parts Rotating transmission parts such as drive shafts, couplings, belt drives, which are within reach of personnel, shall be provided with guards to prevent contact. Guards shall be of robust construction and securely held in place. Fixed guards shall be used when access is rarely necessary and be held in position either by welding or by mounting them in such a way that they can be opened or removed only with the aid of tools or keys. When frequent access is required for service or maintenance purposes, moveable guards may be fitted. They shall fulfill the following requirements: Whenever possible they shall remain fixed to the machine when open. They shall be fitted with a system supporting them in the open position. Compartments containing internal combustion engines shall be lockable. Movable covers, preventing access to such compartments need to have locking devices to prevent unauthorized access. Drill Rigs with Rotating Superstructure