ISO 6292:2020 pdf download – Powered industrial trucks and tractors – Brake performance and component strength
4.6.2 For trucks having a downward movement of a brake pedal (depressing the brake pedal) to apply the service or parking brake(s), the system shall be capable of withstanding a brake pedal force of at least 1 200 N without any failure, cracking or deformation which affects the brake performance or function.
4.6.3 For trucks having an upward movement of a brake pedal (releasing the brake pedal) to apply the service or parking brake(s), the system shall be capable of withstanding a force of 200 % of the maximum possible setting of the spring which applies the brake(s), without any failure or cracking or any deformation which affects the brake performance or function. The pedal when fully depressed, and its associated mechanical stop shall be capable of withstanding a force of 1 800 N applied at the centre of the brake pedal actuating surface without any failure, cracking or deformation which affects the brake performance or function.
4.6.4 For trucks having a hand lever to apply the parking brake(s), the system shall be capable of withstanding a force of at least 600 N applied at the gripping point of the lever, without any failure, cracking or deformation which affects the brake performance or function.
4.6.5 For trucks having a handgrip which is squeezed to apply the service brake(s), the system shall be capable of withstanding a force of at least 300 N applied to the handgrip, without any failure, cracking or deformation which affects the brake performance or function.
4.6.6 For trucks having a tiller which is depressed or released to apply the service or parking brake(s), the system and associated mechanical stops shall be capable of withstanding a force of at least 900 N applied at the midpoint of the handgrip, without any failure, cracking or deformation which affects the brake performance or function.
4.7.1.2 Braking systems with hydraulic accumulator
The capacity of hydraulic accumulator charging system shall be designed so that the pressure in the accumulator is not less than that required to meet the braking performance of either 6.3.1 or 6.3.2, when the service brake is fully applied with a frequency of one brake application every 5 seconds. For internal combustion engine trucks (IC), the test shall be performed at idle speed with the truck stationary. The test duration shall be at least 2 minutes.
4.7.2 Warning device for loss of stored energy
A service brake system employing stored energy shall be equipped with a warning device, which is activated before the stored energy reaches the level at which the truck cannot meet the required braking performance as specified in 6.3. The device shall be clearly visible or audible to the operator and provide a continuous warning when activated. Gauges indicating pressure or vacuum do not meet these requirements. The warning device pressure level shall be set for activation at a pressure level such that the truck meets the requirements of either 6.3.1 or 6.3.2. This requirement is not applicable for hydraulic service braking systems which are redundant by other means, e.g. dual circuit braking systems. The truck shall have enough stored energy to meet the requirements of 6.3.1 after the alarm occurs. Truck speed can be automatically restricted while the alarm is triggered.