When it's an air brake equipped vehicle operating on a for-hire basis which meets any of the following criteria:
The only times you need a CDL for a vehicle with a Gross Vehicle Weight Rating of under 26,000 lbs. is if it's carrying quantities of hazardous materials which requires the display of hazmat placards, if it's designed to transport more than 15 persons (including the driver), or if you're a resident of New York, which requires anyone operating a commercial use vehicle over 18,000 lbs. Gross Vehicle Weight Rating to possess a CDL.
You do not need a CDL if you're operating a vehicle of a class which is not jurisdiction of the Federal Motor Carrier Safety Administration, which includes:
While these do not require a CDL, each state has their own licencing requirements for these types of vehicles.
Air brakes do not determine whether or not a vehicle requires a CDL. You would need a Class B CDL if it were a single vehicle for commercial use which had a Gross Vehicle Weight Rating of more than 26,000 lbs.
Does the vehicle meet one of these criteria:
If the answer to one (or more) of these is yes, then a CDL is required.
The presence or absence of air brakes does not determine whether or not that vehicle requires a CDL to be driven.
Air brakes aren't the determining factor - the Gross Vehicle Weight Rating is. If it's over 26,000 lbs. GVWR, then you need a CDL.
Laws on this vary by jurisdiction - we'd need to know yours in order to tell you which laws are applicable to you.
In the US, unless you have a Commercial Drivers Licence (CDL), you don't need any additional endorsements to operate a non-commercial vehicle with air brakes. If you're going for a CDL, then you need to take and pass the written test for air brakes, as well as road test on a vehicle equipped with air brakes.
Not for a Class C, unless you need to road test on a vehicle with air brakes.
Yes, in Michigan, you are required to have an air brake endorsement to drive a commercial vehicle with air brakes. This endorsement is obtained by passing a written knowledge test specifically for air brake systems.
If you're in the US, there is no such thing as an air brake endorsement. CDL drivers receive a restriction which prohibits them from operating a commercial motor vehicle equipped with air brakes if they do not pass both the written air brakes test and do their road test in a vehicle equipped with air brakes.
The type of brakes used in a vehicle does not determine whether or not the vehicle requires a CDL.A commercial use vehicle requires a CDL when:It is a single vehicle or combination vehicle with a Gross Vehicle Weight Rating or Gross Combination Weight Rating of more than 26,000 lbs.It is transporting quantities of hazardous materials which requires the display of hazmat placards, regardless of the vehicle's weight rating.It is a bus designed to transport more than 15 persons (including the driver), regardless of the vehicle's weight rating.If your vehicle matches any of the above criteria, then you need the appropriate class of CDL and you will need to take the written test for air brakes, as well as conduct your road test in an air-brake equipped vehicle. Otherwise, you will receive a restriction on your CDL which prohibits you from operating a commercial vehicle equipped with air brakes or air-over-hydraulic brakes.If your vehicle does not meet any of the above criteria, then a CDL is not required.
The front brakes on any vehicle do most of the stopping. When you apply the brakes the weight shifts to the front of the vehicle. For this reason the front brakes are needed more than the rear. Try stopping a vehicle with just the hand brake which applies only the rear brakes.
There is no actual air brake endorsement - if you test for a Commercial Drivers Licence (CDL) and either fail the written portion, don't road test in a vehicle equipped with air brakes, or both, you get an L restriction, prohibiting you from operating a commercial vehicle with air brakes. The only times you need a CDL for a vehicle or combination under 26,000 lbs. GVWR is if it's either carrying hazardous materials in a quantity sufficient to require placarding, or designed to carry more than 15 persons (including the driver). In the case of the former, you would need at least a Class C CDL with Hazardous Materials endorsement, and air brakes (if the vehicle is so equipped), as well as the K endorsement for a tanker, if the vehicle is so equipped. For the latter, you would need a P endorsement for passengers (S for school bus), as well as air brakes, if the vehicle was so equipped. If the vehicle you're operating doesn't fall into the criteria of requiring a CDL class licence to operate it, you don't need to be tested for air brakes.
Good luck trying to get such an endorsement, because such a thing does not exist on US licenses.The answer is no. Someone who holds a CDL must complete and pass the written air brakes test and perform their road test in a vehicle so equipped, otherwise they get a "no air brakes" restriction which prohibits them from operating a commercial vehicle equipped with air brakes, but doesn't prevent them from operating a vehicle exempt from CDL requirements which is equipped with air brakes.
If the commercial vehicle requires a CDL to drive it, you do.
Air brakes have absolutely ZERO determination in whether or not a vehicle requires a CDL.
At a minimum, a Class C Commercial Drivers Licence with Passenger endorsement and no air brake restriction (if the vehicle is equipped with air brakes). If the vehicle has a GVWR of over 26,000 lbs (which is a bit unlikely with an 18 passenger vehicle), then a Class B CDL would be required, again with the Passenger endorsement and without a restriction on air brakes, if the vehicle were so equipped.
When you have the vehicle serviced and safety checked the mechanic will advise you when the brakes are in need of repair.