Air Brake Relay - How it Works. Air braking systems and Commercial vehicles

A more detailed look at the air braking system, in particular with this video at 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" • Air Brakes - An Introd...
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Visit our website for a larger collection at: edumech.co.uk

[@iordnbrun5498]

This is the clearest explanation and visualization of air brake systems that I've ever encountered. Thank you!

[@EducationalMechanics]

You're very welcome, thanks for watching.

[@5wh1]

I don't know how to thank you, sir! You nailed this extraordinary air brake relay video down to the science. Excellent devery style and methods to my mind's taste buds. I was blind about this concept, but you made me see! Once again, thank you and may God bless you!

[@vincesmith5846]

Yes! Very good video!! Thanks

[@mr_nice.]

Finaly, a video about air brakes that can be understood by everyone!

[@c.a.mcneil7599]

Thank you for this great video. You must have spent a lot of your valuable time making it.

[@VivekAnandJ]

This was just awesome! I LOVED the "tu tu du..." part. Reminded me of one of the most epic stand up comedians I know, Eddie Izzard!

[@EducationalMechanics]

I love Eddie Izzard!

[@colerobison6916]

This is EXACTLY the information I was looking for. Thank you!

[@TheSuperKnug]

Im soooo happy that ive found you! You could not beleve how much easier my studies are now! Thanks again!

[@SwampDonkey225]

I'm about to start the journey of studying every one of your videos.

[@frankrizzo5659]

I'm a mobile 24 hour diesel mechanic here in Michigan America....I've watched one video and I'm already hooked.... already subscribed on to the next videos lol....thanks keep up the great work my English brother....Britain and America... boyfriend girlfriend FOREVER lol

[@Gary-ld6ht]

Very good explanation-you made it very simple and easy to understand

[@1963BirdDog]

Thanks for taking the time to put this together. Great explanation, graphics are a big help.

[@EducationalMechanics]

Thanks BirdDog, glad it helps.

[@Kevin-ip8uf]

lol, I'm an instrument tech looking for information on pneumatic relays and this was the best video I could find to explain it. well done

[@EducationalMechanics]

Thanks Kevin 😀

[@tankosl]

Great video!!!!The simple graphics make the principles much easier to understand.....thank you very much!

[@EducationalMechanics]

Thanks Mark. It means a lot to us.

[@r0ckworthy]

Awesome video! Now I feel like I completely understand air brake relays, and this is extra helpful because I now know I have a faulty relay on my school bus. Cheers mate!

[@zues2013]

Short concise and informative. Thank you

[@VIP18041988]

Very well explained, can be understood by everyone

[@patodwyer721]

Great video, very informative.
For a small valve, there's a lot going on there. I'll have to look at this video a few times to take it all in. Thanks

[@johannap6252]

Thank you so much for this video! Very well explained. I just discovered your channel and am looking forward to watching more of your educational videos!

[@GunawanWidihardjo]

Thank you, this video is very helpful for brake system analysis

[@shawnwright2356]

Outstanding explanation. Graphics are awesome. Thank you for posting

[@atreaunormandy9827]

Great video really clarified how it works over what books tell you

[@jamieheald8732]

What's even more marvellous is the durability of these parts.

[@bigmack9334]

om a truck mechanic so am loving this video

[@alphatruckersinc.9417]

Very well explained. Thank you.

[@pavankn88]

Very nicely explained & the sound you make in between daa daaa makes me laugh. Keep it up. Thanks for the video.
Namaste

[@kr09876]

2:29 made my day

[@monique2135]

Fantastic video we need more

[@driverbank6563]

Fantastic explanation and illustration. Great video!

[@EducationalMechanics]

Thanks. 😉

[@cck0728]

Excellent video. Relay just acts like a diaphram control valve.
Excellent work. Keep it up.

[@EducationalMechanics]

Thanks Abid Mahmood. 😀

[@HonchoHundo]

I passed my test yesterday but yet here I am still doing refreshers 😂

[@CyberDevNet]

This satisfies my curiosity of that air below vehicle blown on the road. Exhaust... Air released from delivery pipe line.
Thank you.

[@jhalakgurung3980]

Thank you for the simplification.

[@toddjensen692]

That was easily understood, thank you.

[@bujjibabukamasanikamasani9125]

Thanks for explaining the functioning of RV in a simple way...

[@EducationalMechanics]

You're welcome. We're glad it helped.😀

[@matthewdinola1422]

Fantastic Video. Thank you so much

[@chris0t470]

Brilliant video, cannot thank you enough!

[@NOOTSMAZDAS]

Thanks for a thorough explanation

[@laskeysikazwe1770]

You're sooo good at explaining, keep it up

[@EducationalMechanics]

thanks 😄

[@ARUNKUMAR5453]

good one, easy to understand the systems

[@mzee5533]

Good video and clear to understand mate

[@EducationalMechanics]

Thanks Muchie

[@aungmyothein3524]

Very very good

[@omaradan8062]

Thank You Sir, Great Observed Good Idea Video Channel I love this post to learn more about

[@tulw2728]

Finally, I got it.
Thanks to your video
Happy Thanksgiving day

[@EducationalMechanics]

Well Done Private One.🙂

[@torktool]

VERY WELL DONE VIDEO !!!!!!!!!

[@EducationalMechanics]

Thanks Robert

[@manchesterunitedfansintern9524]

Thanks for the information, very well presented😀😀😀😀😀😀

[@DellAnderson]

Superb explanation. Someday (if you like) would love to see a similar video for DD3 (bus, non-spring brake) brake systems. Thanks.

[@truckcaretv8649]

Good 👍

[@CosgroveNotts]

Good stuff. Just like been a DAF training school but without felt tipped pens and no nodding off lol

[@EducationalMechanics]

Still got my red, yellow and blue felt tips! 😉

[@waymondhallum7203]

I was just working on one of those relays last week. Really threw me for a loop I think now I can fix it

[@christopherkane2842]

Awesome information thank you

[@sam111880]

very nice video cleared up the lag issues i was concerned about in air brakes as well as where the sound is coming from when air is released out the exhaust port when you let off the brake pedal as well as the brake button/throttle's on dash. Its this simple relay component that i over looked. The relay is an important components :)

[@truckcaretv8649]

Good 👍

[@gowrisankarm4668]

Great explanation. Well done. I have one common question. What is use of solenoid valve in addition with relay valve and how its functioning?

[@edmourgagnon1504]

Wooooo.
Slow down mate.
Easy to see that you know your stuff.
But remember... good teachers speak slowly enough so that everyone will understand.
This is not a race...
10/10 for the graphics!

[@sierravortec2629]

Really cool video thanks !

[@localcrew]

Great video. Just subscribed!

[@MuhammadFaisal-vm5oz]

Excellent video

[@EducationalMechanics]

Thanks Muhammad.

[@bertieknops9823]

Muhammad Faisal ,,

[@litabay]

Muhammad Faisal 0ll

[@bushmaster777]

Excellent. Good job.

[@reallittleblackdevil]

explained well, thanks

[@Filip_Phreriks]

Super clear!

[@scottsigley3550]

EXCELLENT VIDEO

[@kkfayiz]

this is the best one

[@willieb5052]

This guy is legit! Very educational and it made me laugh!🤣🤣😂😂👍🤘

[@EducationalMechanics]

Thanks Willie B. 😘

[@faizabdalla4651]

@@EducationalMechanics ١

[@cristianwaty6966]

Thanks for Teaching And God Bless

[@chuckt8529]

Thank u so much for the video....

[@akoj3262]

I love this kind of straight forward video and they really takes a lot of theory and time to do this kind of video! Thank you SOOOOOOO SOOOO MUCH!
Have you moved on in life and so never upload since 4yrs ago? :P
Wish u good life and happiness in whatever you are doing

[@EducationalMechanics]

Hi. I’m still here. I’ve got a few more videos to make. I’m just really busy teaching. Thank you for your kind words. :-)

[@tomasnava6416]

Thanks for the great vidio sr.it help me alot

[@alexvarela4605]

Thank you for sharing. very good video.God bless you.

[@EducationalMechanics]

Thanks Alex.

[@ganzosworld524]

Great video.. Thank you

[@trevorcheong4959]

Very good learning video

[@InspirasiBALIKPAPANUpdated]

this video is useful! thanks!

[@OldCrowsClassicCars]

excellent video

[@AutoScholarwithMrB]

Well done!

[@josefachal1608]

Great job

[@lakkimsettyphanindrakumar5810]

Good video....thank you...

[@wolfemanbog4176]

Great info thanks

[@billarroo1]

NICE e explanation, THANKS😃😃

[@ShubhamMishra-ed7mb]

wow , you explained it in so nice way , i can do better tomorrow in my exam, thankyou

[@EducationalMechanics]

Thanks Shubham Mishra, good luck tomorrow.

[@ShubhamMishra-ed7mb]

Thank you sir , i've watched lots of your videos that would be very helpful , thanx a lot

[@ahmad2304]

amazing...explain ❤

[@ductile011]

Best among available...

[@mekanikobisdak4490]

Thanks for sharing this video sir

[@EducationalMechanics]

Thank you for watching. It means a lot to us.

[@zorakeys-reed3326]

When park brake is off I still get air on service side. Any ideas? Park break will not release

[@kbren7517]

Great video

[@ErrejotaNatera]

Excellent. Greetings from Venezuela.

[@charlieabbot3649]

Well done.

[@Teddy_Bass]

Nice channel mate

[@harjindermaan8891]

Thanks for video

[@ovidiofs1]

If I put another axle with brakes , I have to take the same signal from the pedal and putting one tank of air obiusly, great video .....

[@johndavidson4128]

What's the valve called that keeps air in the bags when you drop the trailer?

[@jasonbuckmire6277]

How to set up the lines on the exhaust ports on the 2002 Mack granite concrete truck with the em7 300 engine

[@dsbohra]

Good job.

[@navytechskull1932]

What does the Bendix BX800142 Parking Valve do and how is it wired?

[@Kami-dz3pc]

You are brilliant

[@tonyfolkes5122]

I have a 2017 Frieghtliner Cascadia and the Air Dryer is located right in front of the passenger tire off the chasis, very easy to get at !!!

[@sameuljones5496]

Who cares

[@SuperBayarea87]

Thanks a lot...Excellent video. Can you do the same detailed video for the inner operation of an air compressor?

[@pradeep-ez3dr]

Thank you so much

[@henrytwigger2245]

This isn't the modern two line disk breaking system used on modern European articulated lorries, is it ?
These don't have a separate park break line do they ?

[@paulevans1864]

Is there any valve available that is adjustable to give a higher service brake pressure

[@footalee2]

I just subscribed to your channel 👍🇯🇲

[@SK.The-Machine-Designer]

superb 1👍👍

[@waynepalmer5368]

Great video but where does the exhaust hose(yellow) from the parking brakes goes to?

[@powerbeast5691]

I think it was pretty neat that you seem to talk like the dolphin in Family Guy (Billy Finn)! :)