Semi-trucks are under a great deal of stress and strain, far more than the average passenger vehicle takes on over time. These trucks are constantly on the go, and they’re usually pulling incredibly heavy loads in the process. On the low end of the scale, they can rack up 45,000 miles or so per year, but for many, that figure hovers closer to 100,000. All the while, their drivers deal with stop-and-go traffic, steep upgrades and downgrades, and plenty of other hurdles.
With all that being the case, 18-wheelers are bound to experience mechanical problems at times. Though routine maintenance can help keep those issues at bay, it can’t eliminate them altogether. Some breakdowns just can’t be avoided, and when they arise, having a helpful semi truck service on your side can make a world of difference. With the right mechanic, you can deal with and overcome virtually any malfunction, including the following eight common mechanical problems.
1) Clutch Problems
Clutch problems are certainly common for 18-wheelers. After all, constantly changing gears is going to place excessive wear and tear on the components that allow drivers to gear up and down as needed. Depending on the problem at hand, resolving it may entail replacing damaged seals and gaskets, adjusting linkages or transmission bands, or replacing the entire clutch assembly.
2) Suspension Issues
Suspension issues are also typical with semi-trucks. Heavy loads, especially if they’re overweight or not balanced properly, can take a major toll on a truck’s suspension. Fixing these issues may require adjusting tension or, if the damage is serious, replacing the springs, linkages, or other suspension components.
3) Overheating
Overheating is a common mechanical issue as well. This can be caused by a number of problems, including a clogged radiator, a faulty thermostat, a coolant leak, or a damaged water pump to name a few. Dealing with an issue like this could require relatively simple fixes, like adding coolant or replacing the drive belt. On the other hand, it may take more extensive repairs, like replacing the head gasket, water pump, or radiator.
4) Worn-Out Turbocharger
Turbochargers are essential for 18-wheelers. They help make the engine run more effectively and efficiently and give the truck more power. When one starts to wear out or fails completely, the truck will lose a great deal of power and speed. Resolving this problem generally means replacing the turbocharger, but this part can sometimes be rebuilt to get a little more mileage out of it.
5) Damaged Air Line System
Air line systems are particularly important on semi-trucks. They power the brakes on both the truck and the trailer. On some trucks, this system can keep the tires properly inflated as well. In some cases, the air lines may become dry rotted. Gaskets in the gladhands may wear out as well. Air lines are also known to get pinched, cut, or snagged. When the air lines sustain damage, they can sometimes be repaired. Repair kits are available for drivers and mechanics to keep on hand. If the lines can’t be repaired, they need to be replaced.
6) Oil Leaks
Oil leaks are extremely problematic for semi-trucks. As is the case with all vehicles, the oil keeps the engine lubricated. If that crucial lubrication isn’t there, it could lead to extensive wear and tear on the engine. Leaks are usually caused by broken or worn-out gaskets, loose oil filters or drain plugs, damaged oil pans, and certain other issues. Dealing with those problems as quickly and effectively as possible is the key to keeping resulting engine damage at a minimum.
7) Brake Trouble
Brake trouble is a common problem for 18-wheelers too. Though damaged air lines are often the cause of brake problems, they’re not the only issue that may arise. Brake drums, shoes, rotors, and other components wear out over time, and they often wear out more quickly on semi-trucks than on other types of vehicles. Handling brake problems may entail replacing brake shoes well before they actually wear out and replacing damaged drums, calipers, rotors, and other components when necessary.
8) Clogged or Damaged Fuel Injectors
Clogged or damaged fuel injectors can be a serious problem. They interfere with the supply of fuel to the truck’s engine, and they can cause the truck to run rough and lose power. Dealing with this issue may require cleaning clogged fuel injectors or replacing damaged ones.
Keeping Semi-Trucks Running Effectively and Efficiently
Any number of things can go wrong with a semi-truck. Those listed here are some of the most common. Even seemingly minor problems should be handled as quickly as possible to prevent downtime, safety hazards, and more extensive damage. With an experienced mechanic in your corner, you’ll be equipped to deal with both minor and major issues and keep your truck running effectively and efficiently.
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