First Breakdown: What a New CDL Driver Should Know

CDL school teaches the pre-trip, the backing, and the air brake test. It does not teach what to do when the low air buzzer goes off at seventy on I-10 near Milton with a loaded trailer and a dispatcher who has never heard of you. The first breakdown is where a new driver finds out what they actually know, and most of the mistakes come from not having a plan, not from not knowing trucks.

Here is the plan. It is short on purpose.

The first ten minutes

1. 1Get the truck off the road. Not just onto the shoulder; as far off as it will go, past a curve if possible, at an exit or wide spot if you can make one. Do this before anything else.
2. 2Hazards on. Vest on. Then triangles out at the required distances, and further on a fast road.
3. 3Get yourself safe. Out on the passenger side, behind a barrier or up the bank, never between the truck and traffic.
4. 4Find out where you are. The last mile marker or exit, the direction, and the side of the road. Drop a pin on your phone.
5. 5Take a breath and look at the truck. What is it doing? Smoke, steam, a puddle, a noise, a light on the dash. Write it down.

Everything after this is easier if the truck is off the road and you are safe. Everything is harder, and more dangerous, if it is not. We laid out the full routine in How to Stay Safe on the Shoulder After a Breakdown.

Who to call, in what order

Your company's dispatch or road service line first, if you drive for a carrier. They have a process, and they may have a preferred provider. If you are an owner-operator or the carrier tells you to find your own help, call a mobile repair outfit that covers where you are. Tell them what you wrote down. Then call your dispatcher or the receiver about the load. In that order, because the truck getting fixed is what solves the other two problems.

What to say on the call is its own skill, and we wrote a whole post about it: What to Tell a Mobile Mechanic When You Call. The short version is location, truck, what it is doing, and whether it can move.

Do not try to limp a truck with a red stop-engine light, a rising temperature gauge, or dropping air pressure to the next exit. Those are the three breakdowns that get much more expensive with each mile.

The mistakes new drivers make

• Stopping in a bad spot because it was the first spot. A truck that can still move should use that ability to get somewhere better.
• Getting out on the driver's side. It is the traffic side. Use the passenger door.
• Standing behind the trailer. If the trailer gets hit, that is where the trailer goes.
• Not knowing where they are. Watch the mile markers as a habit. It is the first thing anyone will ask.
• Trying to fix things they are not equipped for. Changing a tire on a loaded trailer on a soft shoulder with the truck's bottle jack is how people get hurt.
• Letting the dispatcher's urgency become their urgency. The load matters. Your safety and the truck matter more, and a fixed truck delivers the load.
• Not writing anything down. The codes, the time, the symptoms, who they called. It matters later.
• Accepting help from strangers on the shoulder without knowing who they are.

The things worth knowing about the truck

You do not need to be a mechanic. You need to be able to describe what the truck is doing, and to know which things are safe to check. Whether the air is building or dropping. Whether the coolant is low. Whether the batteries have voltage. Whether the tire is flat or shredded, and which one. What the dash lights say. Our post on Truck Won't Start: A Roadside Diagnosis You Can Do Yourself is a good example of the level: things a driver can safely check that make the repair faster.

What happens when the crew arrives

The mechanic will ask what happened and what you have seen. Then they look at the truck, find the fault, and tell you what it is and whether it is a roadside fix. Most of the time it is: tires, air leaks, belts, hoses, batteries, cables, lights, and a wide range of engine and electrical faults get fixed where the truck sits. Some things need a shop, and the crew will tell you straight, which beats a tow to the wrong place. It is what mobile truck repair means, and it is not a towing service.

After

Write up the breakdown for the carrier, with the time, the location, the symptoms, and the repair. Keep the receipt. Do a walkaround before you roll, because a truck that has been sitting on the shoulder with brakes set deserves a look. And remember what the truck was doing before it failed, because a breakdown almost always has a warning that a driver learns to hear the second time.

Frequently asked questions

Can I change a tire on a loaded semi myself?

You should not. A loaded trailer on a shoulder needs proper jacking equipment and a stable surface. It is one of the most dangerous roadside jobs there is, and it is what a service truck is for.

Who pays for roadside repair?

That depends on the carrier and the lease. Know the answer before the first breakdown, not during it.

What if I am out of hours when the truck breaks down?

The clock is a separate problem from the truck, and there are provisions for it. Our post on Breakdowns and the Clock explains the options.

How long will I be waiting?

It depends on where you are and where the crew is. Dispatch will give you an honest estimate when you call.

First breakdown, or fiftieth, anywhere on the panhandle: get off the road, get safe, and call Duckett Roadside Repair at (850) 495-0366. Dispatch is answered 24 hours a day.