Common Causes of Semi Truck Breakdowns

Common Causes of Semi Truck Breakdowns

By staying up to date with preventive maintenance, you can minimize the risk of your truck breaking down while out on the open road. But even if you take good care of your truck, there's still a chance that at some point it's going to end up sidelined. If your truck breaks down, you'll want to call up an emergency roadside semi truck mechanic who can get you back on the road as soon as possible. Here's a look at five common reasons that semi trucks break down.


There are several different issues that could cause your rig to overheat. A coolant leak or faulty radiator cap could be to blame. Another possibility to consider is that your thermostat isn't opening and closing like it should. And if you notice bubbling coolant around a head gasket, then head gasket replacement will likely be needed.

Tire Blowout

Tire blowouts are a major concern when hauling heavy loads over long distances. Uneven tire tread wear can increase the risk of a blowout occurring, which makes it important that you keep up with maintenance tasks like rotation and alignment. You'll also want to be sure that you're operating with proper tire pressure.

Electrical Issues

Your truck might be unable to get moving if there is a problem with a starter motor, alternator, or battery. Flickering lights are one sign that alternator trouble is brewing. Sometimes, it can be challenging to identify the wire in your truck's electrical system that is causing a short, but a seasoned semi truck mechanic can often identify and address it in a short period of time.

Oil Leak

A significant oil leak could lead to friction that causes moving parts to break down. To help prevent this from happening, it's important to always keep an eye on oil pressure and stay up to date with oil changes.

Needs Clutch Maintenance

Making sure you have the proper clutch adjustment will ensure you get the most life out of your clutch. It's also important to keep the throw-out bearing greased. You should have 1.5-2' of pedal free play on a non-hydraulic clutch. When it's time to adjust your clutch, make sure the shop or mechanic knows how to properly adjust your clutch. All too often we see techs and shops adjust clutches incorrectly. If they start by adjusting the pedal before making adjustments under the truck at the clutch, then they are doing it wrong.

If you need roadside semi truck repair, be sure to get in touch with a reputable specialist. For 24/7 roadside semi truck repair in San Antonio and the surrounding area, contact the experts at Billy Bob's Repair & Tire at (210) 796-3891. Billy Bob's Repair & Tire also provides roadside RV and motorhome repair in San Antonio!

Billy Bob's Repair & Tire Blog
Posted: December 2, 2020

Written and Published By MORBiZ