What to Tell a Mobile Mechanic When You Call

There is a version of the breakdown call that gets a service truck rolling in five minutes with the right parts already on board. There is another version that burns forty minutes on the phone and then sends a tech out with the wrong tire.

The difference is not the mechanic. It is the information. Here is what to have ready before you dial, in the order it matters.

Location: mile marker and direction of travel

Say the highway, the mile marker, and the nearest exit number. Mile markers are the whole game on the interstate — they are the only thing that gets a truck to you within a hundred yards instead of within ten miles. On I-10 the markers count up west to east.

If you cannot see a marker, read the last exit sign you passed and pull the GPS coordinates out of your phone's map app. Coordinates beat landmarks. Every gas station looks the same over the phone.

Then say which way you are pointed. Eastbound or westbound. Northbound or southbound. Every time.

This is the most-missed piece of information on a breakdown call and the one that costs the most time. On a divided highway there is no crossing the median. A tech headed for mile 25 eastbound when you are sitting at mile 25 westbound has to run to the next interchange, come back, and try again. That is thirty minutes gone.

Say where on the road you actually are, too: right shoulder, left shoulder, a ramp, a weigh station, a truckstop lot, or a customer's yard.

Identify the truck, not just the problem

Parts are specific. The more you can say about the truck, the better the odds the right part is already on the service truck when it shows up.

• Year, make, and model of the tractor. Freightliner Cascadia, Peterbilt 579, Volvo VNL.
• Engine make and model. Cummins X15, Detroit DD15, PACCAR MX-13, Volvo D13. This drives filters, sensors, belts, and which diagnostic software the tech brings.
• Unit number, if you are running for a fleet.
• The VIN. If you cannot read the whole thing, the last eight characters are usually enough to pull the right parts.
• Trailer type and length if the trailer is what failed. Dry van, reefer, flatbed, dump, tanker, lowboy.
• Whether it is a tractor problem, a trailer problem, or you are not sure.

Describe the failure like a mechanic would

Not what you think is broken. What actually happened. Techs are used to translating.

• What you were doing when it let go: rolling at highway speed, pulling a grade, idling, or trying to start after a shutdown.
• What it sounded like. A bang. A hiss that will not stop. A grinding that changes with road speed. A whine that follows engine RPM. Silence. Those all point different directions.
• Does it crank, does it start, does it stay running.
• Does it build air and hold it.
• Which lamps are lit: check engine, stop engine, DPF, ABS, low air, low coolant.
• Any fault codes. If the dash gives you an SPN and FMI, read them off. That alone can decide which parts get loaded.
• Anything on the ground under the truck, and what color it is. Fuel, coolant, gear oil, and engine oil all mean different things.
• Whether the truck is drivable at all or dead where it sits.

Tire calls have their own list

Tire service is the easiest call to get wrong, because a driver who says only that he has a flat has given the tech nothing to load.

• The exact size off the sidewall. 11R22.5, 295/75R22.5, 285/75R24.5. These are not interchangeable.
• The position. Steer, drive, or trailer. Which axle, which side, and inner or outer on a dual.
• New or used. Both are options and they cost different money.
• Steel or aluminum wheel, and hub-piloted or the older stud-piloted style.
• Flat, or shredded. A shredded tire usually takes the mudflap, the fender, and sometimes an air line or a wiring harness with it, and that means the tech brings more than a tire.
• Whether you have a spare on the truck, and where it is mounted.

Loaded or empty, and is it a safe spot

Weight decides how the truck gets jacked. A loaded trailer sitting on soft shoulder gravel is a different job than an empty van in a paved lot. Say what you are hauling, too — a reefer with produce and a rising box temperature is a clock, hazmat is a clock and a different set of rules, and livestock is a hard clock.

Then be honest about where you are sitting. A tech needs to know before he leaves whether he is pulling into a truckstop lot or backing a service truck onto a two-foot shoulder against 70 mile per hour traffic.

• How much shoulder you have, and whether it is paved or soft.
• Which side of the truck the failure is on. A driver's-side repair on a live shoulder may need law enforcement or a lane closure before anyone touches it.
• Whether you are on a curve, a hill crest, or a bridge deck where approaching traffic cannot see you.
• Whether your triangles are out and your four-ways are on.
• If you are in a yard, the gate code, the hours, and who the tech checks in with.

Who is paying, and who can approve it

Owner-operators can approve their own work on the spot. Company drivers usually cannot. Know before you call whether you are authorized to approve the repair or whether the shop has to reach your maintenance department for a purchase order. If your fleet uses a fuel card or a check code for road service, have it in front of you.

Give a callback number that will still be alive in an hour, keep the phone charged, and keep it on you. The tech will call when he is close, and a driver who does not answer waits longer.

The thirty-second version

1. 1Highway, mile marker, direction of travel, nearest exit, which shoulder.
2. 2Year, make, engine, unit number, last eight of the VIN.
3. 3What failed, what it sounded like, what lights are on, what codes are showing.
4. 4For tires: exact size, position, inner or outer, new or used, steel or aluminum.
5. 5Loaded or empty, and what the load is.
6. 6Whether you are in a safe spot and whether the failure is on the traffic side.
7. 7Who approves the repair, and a phone number that works.

Have that ready and call Duckett Roadside Repair at (850) 495-0366. James answers dispatch 24 hours a day, seven days a week, and covers Milton, Pace, Pensacola, Gulf Breeze, Navarre, Crestview, and the I-10 corridor. Tell him where you are, what you are driving, and what it did, and the service truck rolls with the right parts on it.