The ABCs of Air Brakes for School Bus Drivers
Before heading off on your bus adventure, there are only a few things more important to what is euro to dollar conversion rate than the condition of your braking system.
To do that, first, you need to understand the difference between brakes on your bus and your typical vehicle. Buses use Air Brake Systems, rather than hydraulic systems as bfakes in other vehicles. Using compressed air to make the brakes work, the heart of this braking system is the compressor. Often directly attached to the engine, it can also be found engine mounted or belt-driven.
You will find there are air reservoirs positioned in several locations and plumbed together with one-way check valves. These store the pressurized air in readiness to draw from when required in the brake chambers. Your bus will have a low air pressure warning signal. This consists of a warning signal that will come on to alert you before the air pressure in the tanks falls below dith psi. All buses using hydraulic brake systems must be equipped with emergency brakes and parking brakes.
These are required to be fixed by a mechanical force and typically use spring brakes. If the air pressure is removed, the springs apply the braking system. You will see there is a parking brake system in the brakee of the bus that allows the driver to let the air out of the spring brakes and enables the springs to put the brakes on.
Alternatively, if there is a leak in the air brake system causing a loss of air, this will also cause the springs to apply the brakes. Obviously, it is vital to ensure drivers of vehicles traveling behind your bus are aware of your intended movements.
They must be warned when you apply your brakes. The air brake system has an electric switch that turns on via air pressure, ensuring the brake lights go on when you step on the brakes. Ever noticed that weird hissing sound that buses make when it pulls up? Well, I hate to break it to you pardon the punbut that annoying hissing sound happens because instead of the braking system akr fluid like a car does, the bus system uses compressed air to activate the system. There bgakes go, mystery solved!
Air brake systems are what are the events available in gridview to hydraulic brakes for several reasons. Firstly, the what is the shape of cocci bacteria brake systems can tolerate small leaks. Importantly, the parking brake system also ensures a fail-safe emergency braking system, although it is true to say that some hydraulic systems accommodate for this also.
If you are traveling across mountainous areas, you will find that hydraulic brakes may just not cope and become overstressed, whereas air-brakes can withstand this pressure in a much more robust way. When approaching your typical course of stopping your withh, simply push the brake pedal hoq. Focus on controlling the pressure so the bus comes to a smooth and naturally safe stop. It is likely you may have a manual transmission, especially with many of the older cruising buses so if this is the case, it is important not to push the clutch until the engine RPM is down at almost an idle.
As soon as you are stopped, select a starting gear. Naturally, if a vehicle suddenly pulls out in front of you or an animal or other object appears on the road ahead, your human reaction is to slam down on the brakes. While this may be an adequate response if there is plenty of room to slow the bus and come to a stop, there are some safety factors to consider. There are two types how many bottles of wine are allowed through us customs emergency stopping methods, the controlled braking or stab braking.
In controlled braking, the idea is to apply the brakes hard, keeping steering wheel drife very small. If the wheels lock or you need to make a larger steering adjustment, release the brakes then reapply as soon as you can.
Stab braking sees you apply the brakes all the way then release when the wheels lock up. Immediately as the wheels start rolling, hit those brakes again. This will help you avoid wheel lock-up as it engages a computer system that anticipates a possible wheel lock, reducing braking pressure. In this case, there is no need to pump the brakes to stop the vehicle. It is naturally pretty important you get into the routine of measuring and adjusting your brakes.
You may be surprised that is fairly easy and quick, so make sure you put it on your list of must-dos as you are cruising in your bus. When you have a whole lot of weight behind you, it's a pretty good idea to be certain you have the power to go downhill safely.
To drive certain types of heavy vehicles such as a bus, you how to become a picker antique apply for the proper endorsements only if you plan to operate your bus as a commercial business. However, it doesn't hurt to get the proper endorsements more so to educate yourself on how you should operate a large vehicle with air brakes. To be eligible for the air brake testingyou should learn and study about how air is maintained in the system and the pressure conditions required to drive under.
He's an expert in dive and online course generation. Low-Pressure Warning Signals Your bus will have a low air pressure warning signal. All Buses Must-Have Emergency Brakes All buses using hydraulic brake systems must be equipped with emergency brakes and parking brakes.
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Driving A Skoolie With Air Brakes
Feb 13, - - If you cannot learn the air brake system yourself, you can ask for help from any of your fellow driver who is driving a school bus with air brakes or you can simply join a driving centre. - Air brakes must be well maintained all the time. - Image courtesy: zi255.com Feb 01, · The parking valve is typically located on the dash. With normal system pressure, pushing the valve “in” causes air to flow to the parking (emergency) side of the double air chamber, retracting the push rod against its applying spring and releasing the brakes. The parking/emergency system is spring applied and air zi255.com: Richard Stafford. Air Brakes/ Page Section 5: Air Brakes This section tells you about air brakes. If you want to drive a truck or bus with air brakes, or pull a trailer with air brakes, you need to read this section. If you want to pull a trailer with air brakes, you also need to read Section 6: Combination Vehicles.
BmoreDriver Active Member. USA 10 Posts. Bluebird62 Top Member. USA Posts. Jared Top Member. Kodie Top Member. United States Posts.
I trained to do the skills test on a hydraulic bus, and last weekend got behind the wheel of an air brakes bus.
The first time I moved the bus and used the brakes, I almost threw myself through the windshield, but when I applied the brakes it didn't feel like the bus was slowing down unless I applied more pressure, but at that point it was clearly too much. From then on when doing maneuvers at slow speeds, it felt like my braking was really jerky rather than the smoothness I had gotten used to with hydraulic brakes.
Does anyone have any tips of advice for a rookie bus driver on how to bring the bus to a smooth stop using air brakes? When I started buying air brake buses in , most of my drivers freaked. I learned real quick to hang on tight when I first started training them because of exactly what you described.
Give it time, practice, and before you know it you will love them and not want to drive hydraulics. Out of curiosity, do you live in Baltimore?
Are you training to drive for Baltimore County? Air can be compressed, brake fluid can't. When you apply pressure at one end of a hydraulic brake line, the same amount of pressure is immediately transferred to the other end.
When you apply pressure to an air brake line, it creates a pressure wave that has to travel along the line before it reaches the other end. Although it's minimized on newer vehicles, there's always a slight "lag" with air brakes. Most people using them for the first time panic when they don't feel the immediate response they're used to with hydraulic, and apply more pressure, causing the brakes to apply very forcefully.
You're doing it the right way, practicing in a safe environment where you can get used to the feel of the brakes as opposed to waiting until there's a car stopping in front of you. Just take your time, understand that they're different from hydraulic brakes, and keep practicing until you get comfortable. I live in Baltimore, but I'm training to get a job doing charter work. I teach full time but have always thought driving a bus would be fun. I drive both school bus and charter bus.
Charter bus driving is a fun job but it is a way of life also. There are no sick days. If you are a thousand miles from home and you don't feel good, there is no calling in. You suck it up and go because there are no subs just a phone call away to take your place. About the only way you will get a company to get you a relief, is you are in the hospital near death.
There are no set hours, most runs start before the sun comes up. If you do "bumps" you may have to drive miles down the road in a company car, go to bed for 8 hours and pick up the bus trip at a truck stop at A. If that is the kind of life you want then this is the job for you. If you think Limos are boreing, try this.
I did a trip to NYC a couple of years back. Droped the group Sunday and did not have to pick them up until the following Sat. I had a week to kill in a Motel in Hackensac N. I did find a lot to do in NYC but that trip cost me more than I made on it.
I just considered it my vacation. I drove limos for a while but got bored, so its time for something bigger : I see. I live in Pikesville and also decided it would be fun to drive a school bus so I bought an old one.
You can see it in my signature. I've been on this forum since the late 90s and have never met anyone from my hometown so its cool to finally meet one. Good luck with the Air brakes. I'm applying for a local company that does primarily day trips 36 school buses, 6 coach buses so hopefully I won't be facing many overnight trips. I lived in Pikesville when I first moved down here. Does your bus have air or hydraulic brakes?
Where do you live now? What charter company? My bus has air brakes. I'm applying for a job with Chesapeake Charter in Annapolis once training is done. I didn't realize it until I drove a bus without air brakes recently. I was pushing the brake pedal as hard as I could and the bus was still rolling I'm driving for American Limousines in Baltimore, so they have a fun fleet with a wide variety of buses to drive.
I have to say my favorite are the Thomas C2s, the driver's area is unparalleled and the visibility is fantastic. Thanks for the advice a few months back! I find air brakes to be a much more "fun" and easy braking system. I prefer air to hydraulic myself. I love air brakes and would never want to go back to hydraulic. A different feel than air though. Air brakes don't react as quickly, but once they do, the stopping distance seems to be way shorter, at least for the buses I drive.
We have several 35 passenger mini-coaches and a few trolleys that have hydraulic brakes, and I was surprised at how hard I had to press to get them to stop compared to air brakes which slow down with even a little pressure applied.
I also have to say, I prefer the parking brake location. With our hydraulic brake buses, its a stick that I almost always whack my knee on when getting into the driver's seat.
Not sure about the s TCs. I think TCs cerca had them on the floor beside the driver's seat as well, but I'm not certain. School Bus Fleet Magazine Forums.
You will get the feel for them and the only way is practice. It's very difficult to get air brakes to stop as smoothly as hydraulic. I drove limos for a while but got bored, so its time for something bigger :. Once you get the feel you will love it. Glad you're enjoying it! I was in the same boat as you years ago. School Bus M8. I've always wondered how IC "Full Power" hyd brakes compare to air brakes. I find them to be more sensitive in some strange way..
I have found keeping your heel on the floor and pushing with the top of your foot does help a little. This page was generated in 0. Snitz Forums