Hey Truckers! In this Semi Truck 101 video, we walk you through the rear suspension and components of your semi truck. And with our walk around we give you some tips on what to look out for and some things you can do if you see a potential problem.
In this video, we used a 2012 Volvo Semi Truck as our model 🙂
Winter often means snow-covered and icy roads. Experienced truckers know that the lighter the load, the less traction the tires have. Even trucks hauling heavy loads can lose traction in snow and ice. One of the most important things about driving a commercial motor vehicle during adverse weather conditions is to maintain vehicle traction. Ice, snow, and high winds all work towards reducing traction as well as visibility.
Tire chains are one of the best tools to help maintain traction when the road surfaces are covered in winter precipitation. In this video we will show you how to install tire chains on your commercial vehicle. Extreme conditions are not the best time to learn how to install tire chains, so inspect them and practice installing prior to needing to actually use them!
Please remember, even though you might have great traction and the experience to drive in less-than-perfect road conditions, the other driver might not!
A look at the movements and states of operation of the air brake relay.
Relays are fitted to an air braking system for larger vehicles to speed up the application and release of the brakes, minimising brake lag, which is the time it takes between the driver operating the controls (park brake/foot brake valve) and the action actually happening at the brakes.
For a bit more background before watching this video, take a look at our “introduction to air brakes”
For the full video, with narration and a full explanation of the video, see here:
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Another Way by Psykick (c) 2016 Licensed under a Creative Commons Attribution (3.0) license.
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Older Air Brake Systems 1:25
Pre trip Inspection 3:30
Draining the Wet Tank 4:20
ADIS Systems (Air Dryer Integrated System) 6:18
Question – Where is the Air Dryer located on your vehicle? 11:04
Most drivers’ manuals indicate that the air dryer is optional; however, this air brake components have been an integral part of a truck or bus’ air brake system for more than a quarter century.
The air brake system’s air dryer is located between the compressor and the first air tank. On older systems it is located between the compressor and the “wet” (supply) tank. On newer ADIS (Air Dryer Integrated Systems) the air dryer is located between the compressor and the primary and secondary air tanks (reservoirs).
There are two indicators of ADIS systems:
1) The governor is located within close physical proximity to the air dryer – often right beside the air dryer;
2) When building air pressure, an ADIS system will build either the secondary or primary sub-system to approximately 100 psi (pounds per square inch) and then build the other system.
When both systems attain approximately 100psi, both systems will build to maximum system pressure. When the air brake system attains maximum pressure the air dryer will purge, discharge or spit. The air dryer is the first indicator that the air brake system is at maximum pressure. Yet, when conducting a pre-trip inspection, a driver must confirm by the air gauges on the dash that yes, in fact, the system is at maximum pressure.