Winter walkaround: air leak, ABS lamp, tyre cut and a damaged strap
It is 07:15 on a wet January morning. You are due to take an 18-tonne, three-axle rigid with a curtain-side body on a 40 km delivery run. During your walkaround check you find: an audible hiss at a rear brake chamber; with the engine off, the air gauge falls from 8 bar to 6 bar in three minutes; the ABS warning lamp stays on after startup; the offside front tyre has a 30 mm cut across the tread with white cords visible; the nearside rear inner tyre has 2.0 mm tread in the centre but 1.2 mm near the shoulder; and one ratchet strap on the rear curtain has frayed webbing and a bent buckle. The load is eight pallets of tinned food, about 6 t, and the curtains are closed. Your transport manager says the ABS light is “only a sensor” and asks you to sign the daily check sheet and go.
1. Assess the defects. Which, if any, make the vehicle unfit to leave the yard, and why?
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The vehicle should not leave the yard in this condition.
- Air leak: an audible hiss plus a drop from 8 bar to 6 bar in three minutes with the engine off indicates a brake-system leak. Air brakes depend on stored pressure; a leak can reduce braking performance and cause the spring brakes to apply. This is a stop defect.
- Tyre cut with cords visible: a cut that exposes the cords means the tyre structure is damaged. It is not roadworthy regardless of tread depth. It could fail suddenly under load.
- ABS warning lamp staying on: the brakes may feel normal, but ABS may not operate in an emergency. It needs diagnosis; it is not automatically “just a sensor”. Treat the vehicle as unfit until assessed.
- Tread at 1.2 mm near the shoulder: for a goods vehicle over 3,500 kg the legal minimum is 1.0 mm across three-quarters of the breadth and around the whole circumference. The 1.2 mm reading is above the legal minimum, but it is close and should be monitored; the cut tyre is the immediate problem.
- Frayed strap and bent buckle: the strap is not fit for load restraint and must be replaced before the load moves.
Sign nothing that says the vehicle is roadworthy. Get the brake leak and tyre repaired or the vehicle recovered.
2. The transport manager wants you to sign the check sheet and take the vehicle. What should you do, and what does the law expect?
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Refuse to sign a false or misleading check sheet and refuse to drive. The daily walkaround is the driver’s check; signing it confirms what you found, not what the manager wants you to find. Record the defects accurately, including the pressure drop, the exposed cords, the ABS lamp and the damaged strap.
Report the defects to the operator and ask for the vehicle to be taken out of service, repaired and rechecked. If the manager continues to pressure you, escalate through the company’s maintenance or safety reporting system and keep a copy of the report. An employer cannot require you to drive a vehicle that is unroadworthy, and you remain responsible for not using it on a public road. If a defect develops after departure, stop in a safe place and report it rather than continuing to the depot.
3. How should the load be secured, and why are the curtains not sufficient?
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Curtains are primarily weather protection, not load restraint. Do not assume they will hold 6 t of pallets. The load must be restrained so that it cannot slide, tip or fall during braking, cornering or sudden steering.
Use rated straps, internal restraints or other suitable systems in good condition. Replace the frayed strap and bent buckle. Attach restraints to proper anchor points, tension them correctly and check the load after the first few kilometres. Make sure the pallets are stable and that nothing can move against the curtain or rear doors. The aim is not simply to “look secure” but to withstand normal driving forces without the load shifting.