The Pre-Trip That Should Have Ended in the Yard

Do not move the vehicle:

1. The air system. A healthy compressor should build to its governed cut-out pressure, typically around 8 bar, and the low-pressure warning should extinguish well before that. A system that stalls at 5,5 bar with the buzzer still on is not storing enough energy for the braking it must do. On a long descent, repeated applications will drain it faster than the compressor can recover, and below about 2 bar the spring brakes apply by themselves - which on a bend means locked rear wheels.
2. The hiss at the rear left wheel. That is an active leak, most likely a brake chamber diaphragm or a valve. It will get worse, not better, and it is on the circuit you will rely on most.
3. The cut exposing cord on the front-left. The steer axle carries the steering and most of the braking load. Cord exposure means the structure is compromised and it cannot be repaired by patching. At highway speed under a 16-tonne vehicle it is a blow-out risk with loss of steering.

Fix before the trip: the mirror - a cracked offside glass narrows your field of view and is a defect on the sheet, even if it is not the reason the truck is standing.

Record and monitor: the 3 mm tyres are above the legal minimum but are close to the end of their life and must be planned for replacement.

A pedal that "feels normal" proves nothing on air brakes - it is stored pressure, not pedal feel, that stops the vehicle.

The previous driver's signature is evidence about their shift, not yours. Your pre-trip is a fresh legal duty every time you take control of the vehicle, and a false or careless "no defects" entry does not transfer the risk to them.

Concretely:

1. Complete a new defect report in writing, itemising the air pressure, the audible leak, the cut front tyre and the mirror, with the time and your odometer reading.
2. Do not sign the pre-trip checklist as roadworthy. If the system forces you to sign before releasing the truck, write the defects on the sheet itself.
3. Hand the report to the dispatcher and the workshop, and state plainly: the vehicle is not to be moved until the air leak is repaired and the front tyre replaced.
4. Get the refusal recorded - a message, a job card, an email. A verbal refusal disappears the moment something goes wrong.

Why it matters personally: the driver of an unroadworthy vehicle is liable, and the operator is separately liable for requiring or permitting it. If you drive and someone dies on a descent with a leaking air system, "the other driver signed it" is not a defence; the fact that you heard the hiss and saw the cord is the whole case. Refusing a defective truck is a protected decision, and it is also the cheapest repair the company will make all year.

"I will take responsibility" has no legal weight. Responsibility for a roadworthy vehicle sits with the operator and with the driver, and neither can contract it away to the other. The dispatcher cannot lawfully instruct you to drive a vehicle with a known brake defect, and you cannot lawfully agree.

Practical sequence:

1. Offer the alternatives that keep freight moving: a substitute tractor or rigid unit, a split load onto two smaller vehicles, or a workshop repair within the window.
2. Ask for the instruction to drive in writing. That request alone usually ends the conversation, and if it does not, it documents exactly who applied the pressure.
3. If nothing is available, the truck stays and the load is late. A late load is a commercial loss; a descent out of Maluti or Van Reenen's Pass with a leaking air system and a marginal steer tyre is a fatal collision.
4. Report the defect through the operator's system, and note that an operator who habitually releases unroadworthy vehicles exposes the operating licence, not just a single trip.

What you never do is accept a verbal waiver, sign a clean sheet under protest, or tell yourself the leak is small. Air leaks are small right up until the moment the warning buzzer is the last thing you hear before the barrier.