How to Repair Brake Booster Vacuum Leak | Truck Brake Servo and Master Cylinder Repairing & Cleaning
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- Опубліковано 31 лип 2021
- How to Repair Brake Booster Vacuum Leak | Truck Brake Servo and Master Cylinder Repairing & Cleaning
The hydraulics of brakes is quite simple. A primary piston (known as the master cylinder) pushes fluid into hydraulic lines that get fed out to the wheels. The piston inside the caliper (or wheel cylinder inside the drum) will expand with the fluid, causing it to glide up against the disc (or drum), slowing the wheel.
The brake booster was developed to sit in between the master cylinder and driver's pedal, to make it easier for it to press the pedal. While the master cylinder's diameter is already smaller than that of the caliper pistons, the force required to compress it is still great.
The brake booster works on the principle of vacuum differentials to aid in pushing the master cylinder. On one side, vacuum is sucked from the engine's intake. At idle, a valve in the diaphragm allows vacuum to be passed through the diaphragm, so that vacuum balances both sides.
When you depress the brakes, that valve moves, sealing off the vacuum side, while allowing filtered atmospheric air to enter the booster from the brake pedal side. This creates a pressure differential between the diaphragm, which helps to force the piston in the master cylinder to compress.
A giant return spring brings the diaphragm back to its rest position when the brake pedal is released.
The master cylinder consists of two small pistons in series. Each piston routes to two diagonally opposite wheels, for redundancy in case one springs a leak or the seal is compromised. Reserve brake fluid is contained in a reservoir above the master cylinder and is sucked into the piston assembly when the brake pedal is pushed.
Periodic brake flushes are required because brake fluid is hydroscopic and will absorb moisture and loose its effectiveness over time. Furthermore brake fluid will wear down with heat, and may become contaminated.
#RepairingBrakeBoosterVacuum #MasterCylinderRepairing&Cleaning #Howtofixbrakeservo
Love watching the older gentleman teach the young kids much respect from chicago
Yeah, waste not, want not. The best part was at the end when the dad filled the master cylinder with the dirty nasty brake fluid and then topped it off with a little new fluid. They don't have the correct tools, so they use a hammer and a large punch on the big nut. I so glad I didn't attend this school or I would have been a half-ass Mechanic.
Job security.
These people make do without all the fancy tools of the western world. Despite their lack of tooling, they manage to keep these trucks running for years in less than ideal conditions. I bet that if you give these people all the tools they need and a week of some modern training, they will become much better mechanics than most of their us or eu counterparts.
@@johnjones5954 Imagine if they had your tools, they'd pass you up in a heart beat and they're 12-13 year olds, LOL.
Good job it’s nice to see you working together and for the kids to be taught how to fix things 👍🏼👍🏼👍🏼👍🏼 much love and respect from the US
I wish I could send you a Milwaukee battery impact and a case of brake clean! You guys make it look easy. Let the young man rebuilt it. Good job fellas.
Ya gotta love how they start the little ones out young & train 'em to work on heavy trucks in such a dangerous environment.
Better than all the presents under the Christmas tree is the presence of a happy family. Congratulations, your family is SAINT, AND VERY EXCELLENT MECHANICS; BRAZIL
Selten so einen umsichtigen,flinken und fleißigen jungen Burschen gesehen der den älteren Mann bei der Reparatur hilft !!!
Alsalam Aleekom Brothers of Pakistan , I enjoyed each video in your channel as I remember in 70' and 80' there were similar skills mechanic from Pakistan, india , egypt and Sudan in Jeddah workshops , I learned lot of them , my respect to people who have such skills which become rare now days with new life style and lazy generation ,
excellent young workers!
Ok I'll say, this is the 1st time I've seen actual open end wrenches being used, as well as a work bench. I also seen a bench vise!
They aren't as poor and dirty as they appear, just very lazy. I've seen some high dollar machining tools on this channel, on top of the dirt floor
@@gangisspawn1 lazy??? You must not be from around these parts... you can't even get people to work so a fast food restaurant can be open 24 hours... Wendy's even offers a &1000 sign on bonus... that is pathetic and an all time low when looking at people being lazy.
@@terryhites1 Fast food workers don't work in dirt and wipe their ass with bare fingers. By choice.
Steel Toe Sandals...who knew!
Un-f#$king-believable!!!!
They have a workbench!!!!
New seals, naw just turn them around and recondition with the rag. A big pipe wrench can fix anything.
exactly the repair jobs that return over and over...
Este muchacho ya no entrará por las puertas de un colegio, pero será un mecánico excelente .
Дружно отец с сыном работают
чудо стол на котором турбину делали
Pro👍🏻👍🏻👍🏻👍🏻👍🏻
They used the old oil, just added some new.
shade tree repairs that end up in repeat constant repairs...
@@tryduck6993 They are using grease in the brake parts, that will ruin the rubberparts. Use brake grease, not grease.
👍👍👍👍👍
OMG! (有)タカノ物流...
Very smart kids. Please please send them to me school so they can be pro and have better life.
но про новую тормозную жидкость, и про спец ключи они даже и не слышали.
Que hace alec baldwin alli?
Creí que solo yo lo había notado !!!!!! Saludos desde Costa Rica...
kasanın düşme tehlikesi var.destek koyun. yoksa sizi ezebilir.Türkiyeden selamlar
1st to post.I traid 20 cows,100 chickens and lazy wife for that truck.
ok but the lazy wife will cost you $10,000 extra
@@XD-te6vj.
get rid of all the BS on the truck keep your cows because you'll need offspring and its a deal
Why is there some kind of a ''snow plough'' in front of the trucks grill??? That must be causing overheating of the engine since almost everything is blocked, I understand they have a culture of decorating their trucks, but this is so irrational...
I'm sure they also view some western people's habit of breaking perfectly working items for fun as irrational. Hobbies like bungee jumping, sky diving, bouncing monster trucks around.
In both cultures, it's their way of showing who's got a bigger dick.
did not see that truck body chocked in any way .
A country that lacks any type of safety , have ya seen the way they drive . Yep no type of license testing that ...everything they do is a dangerous , because they make is so with their way. Willing to bet they claim the entire country has gone 300 years without a single on the job accident recorded !
At 3:03 , of course the guy HAD to put the assembly on the GROUND, instead of on the table that was next to him… Good grief people, what is with you with the floor/ ground/ dirt?..
Yikes, no safety support for the bed?
way they see it is they have 30 kids to replace him in the back cages if something went wrong...
No wonder Pakistan lags behind and you never see MADE IN PAKISTAN label on anything mechanical : working on the dirt floors, not knowing what a lubricant is , filthy shops, child labor, etc etc…. Being poor is no excuse to being filthy .. I guess it is the culture thousands years in a making.. Those guys could really be awesome under the right circumstances.
They don’t even clean the parts… slap some grease around and reassemble… et voilà. Good for another 50 miles… LOL
this is not a vacuum,this is a pneumatic
air over hydraulic..
ini sih mekanik jalanan, alat seadanya... minyak rem ga diganti, yg bekas jelek butek dipakai lagi, hadeuh......buka mur dibetel sampai cacat, not rekomen sama sekali.....
Инструменты ? Не , не слышал !
а в какой это стране?
@@user-dt8vm9wp4i , Пакистан
Iopa. Nara.m..
حد يفهمني ليش بزينو الشاحنات السيارات في هذا الشكل المقرف هل هم من كوكب آخر بدي افهم رأس هذا الشعب عن جد.
these videos make me mad... everyone keeps saying what good jobs they do ect ect but WHY is it they apparently cannot afford a decent set of tools so must use what they have when you can clearly see people walking around with iphones... the price of a good iphone would buy many usefull tools such as a socket set and or a torque wrench.. would make the lives so much easier. and would also increase the speed at which they could do these jobs.watching them compress the spring while leaning over it was terrifying ANY spring under tension like that is just 1 slip away from killing or maiming someone very very dangerous.
When you have a entire country all doing the same BS , they think it is good skilled repairing. They ignore the rest and pat themselves on back while they put other countries down calling them throw away societies. Its because they are so far behind in the past they just cant learn to become better. They pass their bad habits down from one to another , teaching each BS thinking oh its so skilled at repairs and working. The real world sees what they cant or dont want to see..they are junk repairs that will never last. This is how they want things and not smart enough to become better.They blame other countries but it is them that are the reason they are in the GD dirt with crap tools doing repairs that will always end in failures. They dont keep records so they dont have to see the truth on just how high the repair failure rate is there. That shows just how really skilled these people are at being responsible for repair failures. Work in the dirt , you produce dirt repairs period! This shines true on how they present themselves.They use machines that they clearly cant properly understand and operate on a daily thinking they are doing top notch repairs that are nothing more then patch work leading to the next failure! People who have turned wrenches and have real repairing backgrounds that have the proper tools to complete jobs safely , cleanly and honestly know instantly how really unskilled these people are. It shows in everything they do.From choices they make working lathes right down to tossing parts into the dirt they plan to reuse. To people that have no repair background they see oh yea thats awesome work because they lack knowing what proper repairing is! A bunch of poorly trained mechanics will always think they are skilled as is their buddy across from them all working in the same dirt.
I wouldn't want them working on anything of mine.
надо было головой постучать а не ключом , может бить лучше будет работать.
As with most of these vids, I don't see any specific repairs taking place. Where are the new parts, what was replaced?
Strip & assembly videos don't really teach much of anything. A qualified tech should already have the skills to handle those aspects of the job - the really useful information is in knowing which parts fail & how to detect them - which is not always intuitive.