Explore Semi-Truck Body Areas and Key Components: Easy-to-understand Buying Tips!

Semi-trailers are a central tool in the freight logistics industry. Its complex structure and diverse components allow it to meet a variety of transportation needs. Understanding semi-trailer body area names and trailer components not only helps with repairs but also helps potential buyers better choose the right semi-trailer and semi-trailer engine parts for their needs. Next, MyMROmarts will provide you with a detailed overview of semi-trailer body area names and their major components.

 

Semi-Truck Body Area Names

The body of a semi-truck can be divided into several zones, each with a different function. In this article, MyMROmarts will briefly describe its main body zone names.

 

1. Cab

The cab is the center of operation for the truck driver. It usually includes a steering wheel, dashboard, seat and various controls. Advanced cabs are also equipped with a sleeper area for the driver to rest during long drives.

 

2. Engine Compartment

The engine compartment is the location of the power source and contains the engine, radiator, engine air filter and other key components. It is located in the front of the cab.

 

3. Chassis

The chassis is the skeleton of the semi-trailer. It supports the weight of the entire vehicle and connects the body with the trailer. It contains the suspension system, drive axle and fuel tank.

 

4. Hitch Area

This section is used to connect the truck head to the semi-trailer and enables towing via the fifth wheel hitch.

 

5. Trailer Frame

The trailer frame is the main structure of the semi-trailer and is used to support the cargo and other components.

 

6. Axle

The axle is the area that supports the wheels and carries the weight. It is commonly configured as a single-axle or multi-axle structure.

 

7. Cargo Compartment

The cargo compartment is the core part of a semi-trailer, which can be divided into a dry cargo compartment, refrigerated compartment, flat cargo compartment, and so on according to the use.

 

Semi-Truck Trailer Components

Semi-truck trailers are made up of a variety of components. These components work together to ensure the safe operation of the vehicle.

 

1. Hitch System

The fifth wheel hitch is the core component that connects the truck to the trailer.

The hitch pin is usually mounted on the front of the trailer to match the fifth-wheel hitch.

 

2. Suspension System

The suspension system is usually used to absorb the impact of the road surface. Its presence improves vehicle stability. Common types include airbag suspension and mechanical suspension.

 

3. Braking System

Air brakes are braking systems that are actuated by air pressure. This type of braking system is standard on semi-trailers.

Brake drums and pads are the components responsible for friction braking.

 

4. Electrical System

It includes the lighting system (e.g. brake lights, turn signals) and the trailer cables.

 

5. Tires and Wheels

Semi-trailers are usually equipped with multiple sets of tires to share weight and improve safety.

 

6. Outriggers

Outriggers are used to support the trailer when the semitrailer is separated. The outriggers are usually height-adjustable metal brackets.

 

Common Uses of Semi-Trailers and Suggestions for Selection

Semi-trucks are widely used in long-distance freight transportation, cold chain transportation, construction material transportation, and other fields. When choosing semi-trailers, you can consider the following aspects:

 

1. Transportation Needs

If you need to transport refrigerated goods, choose a refrigerated semi-trailer equipped with refrigerated equipment; if you are transporting large machinery, a flatbed semi-trailer is more suitable.

 

2. Road Conditions

On rugged roads, it is recommended that the model with better suspension performance be chosen to ensure comfort and safety.

 

3. Carrying Capacity

According to the weight of the goods, choose the appropriate number of axles and frame strength.

 

4. Engine Compartment Parts Selection Suggestions

The engine compartment is an important area of the semi-trailer, and the quality of its parts directly affects the performance of the vehicle. When you need to replace engine parts, it is recommended to choose aftermarket engine parts provided by MyMROmarts, such as high-performance radiators, air filters, and starter motors. These aftermarket parts are known for being cost-effective and ideal for semi-trailer maintenance.

 

Common Problems and Maintenance Recommendations

1. Loose Hitch System

A loose hitch system can cause the trailer to detach. It is recommended that the user should check the wear and tear of the hitch and pin regularly.

 

2. Braking System Failure

When you find that the braking effect of the semi-trailer decreases, you should check the air pressure, brake drum and brake pads immediately.

 

3. Tire Wear

Regularly check tire pressure and tread wear to ensure safe driving.