10 Ways Your HGV Could Fail its Annual Test
From 2016 to 2017, around 428,000 HGVs were tested to ensure they are safe enough to operate on UK roads. Of that number, around 44,000 failed with a final failure rate of 10.3% after retests. Trucks older than 12 years had a failure rate of 33.5%! HGVs are on the road day after day with a lot of wear and tear inflicted on the vehicles, therefore ensuring that they are working correctly is incredibly important. Here are ten of the most common lorry test failures.
- Headlamp Aim - 4% of lorries failed this test in because of headlight misalignment. Use a headlamp beam checker to ensure your lamps are shining correctly.
- Lamps - HGV lamp related issues accounted for around 3.8% of failures. Lamps including headlamps, fog lamps, stop lamps and side marker lamps should be fitted correctly and producing the correct colour and brightness.
- Brake System Components - 3.2% of vehicles failed this test in 2016/17 because of missing components or defective operation. The importance of working brakes is obvious.
- Service Brake Performance - the service brake is tested according to the type of braking system used (air pressure, vacuum, hydraulic etc). 2.3% of trucks failed this test due to brake mechanisms sticking on wheels, brake effort fluctuations etc.
- Steering Mechanism - responsible for 1.9% of vehicle failures, according to the DVSA the steering mechanism mustn't be stiff or rough, with no excessive deformities or wear.
- Suspension - 1.6% of trucks failed this test because of damage to the components (fractures, corrosion, wear) or missing parts.
- Parking Brake Performance - 1.1% of HGVs failed this test because of the lack of braking effort applied to wheels. The importance of working parking brakes cannot be understated.
- Wiring - the main reasons for failures include poor insulation, battery related leaks, damage and the risk of fire or injury. This accounted for 1% of failures in 2016/17.
- Speedometer & Tachograph - 0.9% of vehicles failed this test last year. Tachograph and speedometer seals must be in place, calibrated and components must be free from damage.
- Hazard Warning - 0.8% of lorries failed this test because of hazard warning lamps not operating correctly when the engine was stopped, failure of individual indicator lamps and dashboard tell-tales not fitted or inoperative.