(c) Loose connections or leaks in the system (b) Control insecure on valve or valve insecure (a) Control cracked, damaged or excessively worn (a) Low-pressure warning gauge or indicator:Īll vehicles with a secondary brake control - in addition to or in place of the normal parking brake lever - must be inspected. It is not a defect unless the warning light stays on after the engine has been started.
Some vehicles with full power hydraulic braking systems will illuminate the low-pressure warning light as soon as the ignition is switched on. Warning devices may be visual or audible but only one needs to work if both are fitted. Vehicles first used before 1 October 1937 do not need to be tested for low-pressure warning.Ī vehicle with an ULW up to and including 3,050kg with a reservoir coupled direct to the induction manifold or a reservoir integral in a servo unit, is not necessarily required to be fitted with a warning device. (e) External damage likely to affect the function of the braking system (d) Air leak causing a noticeable drop in pressure or audible air leak (c) Repeated operation of any ancillary air or vacuum system completely depletes the stored air or vacuum for the braking system (b) Time taken to build up air pressure/vacuum to safe working value not in accordance with the requirements (ii) two brake applications after warning device has operated (or gauge shows an unsafe reading) (i) four brake applications after the warning device has operated (or gauge shows an unsafe reading) (a) Insufficient pressure/vacuum assistance for less than:
However, you should not reject a brake pedal if the vehicle has been manufactured with one that does not have grooves or anti-slip material. You should reject a brake pedal if its grooves or raised grip sections are worn smooth. However, some vehicles may have been manufactured with a brake pedal which did not incorporate grooves or the fitting of an anti-slip material and these should not be rejected. Service brake pedal or hand lever condition and travelĪ brake pedal rubber is an anti-slip material and is therefore not regarded as a defect if it’s worn smooth.Ī brake pedal without a rubber usually has grooves or raised sections to provide grip in wet conditions and should be rejected if it’s worn smooth. Service brake pedal or hand lever pivot Defectġ.1.2. Additional braking device (retarder), if fittedġ.1.1. Brake actuators - including spring brakes, hydraulic cylinders and callipers Brake servo units and master cylinder (hydraulic systems) Service brake pedal or hand lever condition and travel