How to Determine Air Brake Adjustment-Applied-Pry Bar-Mark & Measure
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- เผยแพร่เมื่อ 1 ต.ค. 2024
- For both a road test & your daily pre-trip inspection you must determine if the air brakes are in adjustment. Watch the video! CDL IN-CAB Air Brake CHECKLIST: www.smartdrive... SUBSCRIBE TODAY! ► / smartdrivetest
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Depending on where you're taking your CDL licence, you are required to check air brake adjustment. Either the pry bar or the applied stroke method will be required. Most jurisdictions use the pry bar method to determine if the air brakes are in adjustment.
Safety first: chock the wheels, release the parking brakes and ensure that the system air pressure is above 90 psi (620 kPa).
If using the pry bar method, you'll require a pry bar. Using a pry par, force the push rod out of the brake chamber. The push rod should not extend out of the brake chamber more than 3/4 of an inch, or the width of your thumbnail. In New York & the state of California, they allow 1" inch of travel using the pry bar method.
Other jurisdictions, such as Ontario in Canada, require that license examinees use the applied stroke method. Again, chock the wheels, release the parking brakes and ensure the system air pressure is above 90 psi.
Mark all the push rods at a fixed point - usually the face of the brake chamber. Apply the service brakes and hold - either get someone to hold the service brakes in the applied position or use a stick, or other device. After applying the service brakes, measure from the fixed point out to the mark on the push rod to determine if the air brakes are in adjustment.
With automatic slack adjusters on a Type 30 brake chamber--which are the most common--you are allow 2" of push road travel. In the rare case that you have manual slack adjusters, the push rod is allowed to extend out of the brake chamber 1 3/4" inches.
The amount the push rod is allowed to extend out of the brake chamber is determined by brake chamber size, and the size of the brake chamber is determined by its diameter.
If the brakes are out of adjustment, and the vehicle is equipped with automatic slack adjusters, you can attempt a "6-pack" to bring the brakes back into adjustment. Pump the system to maximum pressure, make 3 full, hard brake applications. Pump the system's air pressure back to maximum and make 3 more full, hard brake applications. Often this will bring the brakes back into adjustment. If not, the vehicle will have to be brought to a mechanic for repair.
Good luck on your road test!
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If you do pry bar it's 3/4 in and if you do applied method it's 1. 3/4 in.?
Yes - 1 3/4" inch on a Type 30 brake chamber fitted with a manual slack adjuster. Almost all slack adjusters in this day-and-age are going to be automatic, so it's 2" inches using the applied stroke method. See this chart for more info: www.smartdrivetest.com/cdl-air-brakes/chart-of-adjustment-limits Drop us a note if we can help further. Cheers Rick
@@smartdrivetest thanks for replying to his message. So I have no one to help me to perform applied stroke but thats what the dot does here, Sto see what they see on applied stroke with free stroke please give me the correlation. Two inches applied stroke equals how much free stroke? Lastly please give me the relationship or formula to compare applied and free stroke on my type 24 steer chambers. Please sir and thanks!!:)
Cut a bit of board and jam it between the seat and the brake pedal. That’ll work. Find out if your state requires applied or free stroke my friend. Cheers Rick
@@smartdrivetest I’m confused in California can you do the applied pressure method to check if brakes are out of adjustment? And it’s no more than 2 inches?
Thank you , You might save some lives with this video. At the very least it will save me a bad DOT inspection. I got my CDL in Ohio. We were only required to know the tolerances, not demonstrate it. My schooling ( Clark State) also didn't teach it. The six pack thing wasn't even taught ! I will use this knowledge from now on. Thanks again from a newbie.
Use a two inch piece of material instead of a tape measure. It’ll act as a go or no go gauge, so if this clearance fits your out of spec.
Keep up the great work! we need more insturcture like you on the youtube
Hi MATBS Accounting - Thank you for your excellent compliment. And you are most welcome my friend. We're happy to hear we could help out. If there is anything further we can do, drop us a note. Always happy to help. All the best, Cheers Rick
How much foot pressure to perform the chamber throw test?
Even set at 100psi the if the foot pedal is pushed hard to floor (ohhshiz stop), the chamber brake throw will be very near the max stroke. On a normal application. It is within spec.
I would just think that the 90-100psi would limit it.
Are you talking about measuring pushrod travel with the applied stroke method, or are you talking about the leak test? If you're talking about the former - it's more than 100psi. If you talking about the leak test, it's maximum pressure because you have to first check to see that the governor kicks out before 135psi, or whatever the number is in your state. See this checklist for some help: www.smartdrivetest.com/pass-cdl-air-brakes-checklist Drop us a note if you have further questions. Cheers Rick
@@smartdrivetest
Applied stroke is 90-100psi.
How much foot pressure should be applied ( or can be). From what i have seen.. If the foot pedal is pushed hard to the floor it will make that applied stroke to the max.
Jaming the brake to do this check one manned takes some footwork and often results in the pedal pushed farthur than a normal brake application.
Point being one persons normal brake application can be different than another. Resulting in different measurements.
Alright, I know what you're asking me. Nope, push the brake pedal right to the floor and hold as hard as you can. If you release the pedal and there is air leaking, the test is void. So make sure you hold the pedal tight, tight. All the best, Cheers Rick
@@smartdrivetest I only need 10-12psi to feel the brakes and slow down. Unless I need to stop now, may be 30psi. Never needed more. Dot said to hold it to the floor at 60-90 psi so he could check! Is that crazy?? When do you ever do that much?
Everyday you check those brakes.
🖖
The truck driving school I went to stressed that checking your slack adjusters is always a part of your pre/post trip inspection
Hi teal94z28 - Apologies for the late response. Thank you for your comment. It is law that you check the adjustment of the brakes everyday. However, since the advent of automatic slack adjusters, this is often overlooked and not done. All the best, Cheers Rick
I'm training as a class8 tech and this video taught me more than my trainer did. Thank you for clear and comprehensible information that will allow me to do my job properly.
Hi Rodan - And you are most welcome. We're happy to hear we could help out. If there is anything further we can do, drop us a note. Always happy to help. All the best, Cheers Rick
Good Video, Thanks for uploading it! I never was taught the "Six Pack" technique. If you do a normal 4-Point Brake Test every day, and engage the brakes all the way down on the pedal on each push. Shouldn't that also make the slack adjusters move? Although after watching your video I'd bet that the air pressure would be below 90 PSI too quickly, and it might only get the brakes partially adjusted. And I must be a brute, because I can pull the slack adjusters out with my gloved hands. :-) Although I will be picking up a small pry bar like you used in the video to make it easier! LOL
Hi LordTimelord - Thank you for your comment. I suspect you are a brute my friend if you can pull the slack adjuster out with you hand. ;0P And yes, if you're making 4 hard brake applications every day, that will adjust up the automatic slack adjusters, so long as these are being greased every couple of weeks. Also, you are correct - you can only do 3 hard brake applications before you have to pump the air pressure back up to 90psi. If there is anything further we can do, drop us a note. Always happy to help. All the best, Cheers Rick
Do it everyday in pre trip inspection. 4 hard brakes with pause before leaving. Never ever a problem.
Hi Ravinder Sidhu - Thank you for your comment. And you're checking pushrod travel ensureing all the components are working and note damaged. All the best, Cheers Rick
We have alot of trailers in our fleet that run on longstroke chambers (square ports) which allows extra half inch. We're phasing out and all new ad of 2011 are air disc equipped. My question is whats the difference between the two and why does one allow half inch more than the other. Hope to hear from you soon.
Hi Eric Brule - Thank you for your comment and query. The reason that the long strokes have another 1/2" inch of push rod travel is owing to the bigger chamber, which allows for a full 3" of travel before the plate inside hits the bottom of the chamber. For safety however, the push rod is only allowed 21/2" of travel. In other words, it's the depth of the brake chamber that determines the travel of the push road and its legal limits. If there is anything further we can do, drop us a note. Always happy to help. All the best, Cheers Rick
Smart Drive Test thanks for the reply. It always baffled my mimd and couldn't find the amswer. I learned about 10 years ago on how to tell the difference between the 2.
Hi Eric Brule - you are most welcome my friend. Glad we could help. All the best, Cheers Rick
@@smartdrivetest I was looking for the link to the chart you was talking about but not able to find it in the comments
I'm confused, you did pry bar and in usa manual is says inch or less is good, you would think that is for all brakes front back and trailer, but you are saying the type 30 brake pods are going to be 2" or less is that correct?
Apologies for the late response. Using the "pry bar" method it's less than 1" inch my friend. However, it you're checking the brakes using the applied stroke--as the DOT will--then it's 2" for a Type 30 brake chamber with automatic slack adjusters. Applied stroke means you chock the wheels and push down on the brake pedal. See here for different measurements of different brake chambers: www.smartdrivetest.com/cdl-air-brakes/chart-of-adjustment-limits Drop us a note if we can help further. All the best, Cheers Rick
Why push rode travel is different for applied method which is 2 inch and quarter an inch for pry bar method
Hi govind chib - You can apply the same amount of pressure with a pry bar as can be applied with the air pressure my friend. If there is anything further we can do, drop us a note. Always happy to help. All the best, Cheers Rick
Thanks for the great video! I'll have to start doing a six pack as part of my daily PTI.
Hi Irreverent Crawfish - Thank you for your comment. And you only have to do a six-pack if the brakes are out of adjustment. Most of the time these aren't going to be out of adjustment with automatic slack adjusters. Let me know my friend. If there is anything further we can do, drop us a note. Always happy to help. All the best, Cheers Rick
He rite but soooo wrong short stroke or long stroke chamber 30 spring break different adjustment length
Long stroke was a short lived fad in the 1990s. If it is a long stroke it’ll have square ports and the adjustment on a Type40L will be 2 1/2 inches. All the best, Cheers Rick
I am reviewing the MTO Ir Brake Handbook and see no reference to using a pry bar.
In Ontario you have to use the mark and measure my friend. Drop us a note if you have further questions. Cheers Rick
Going for a CDL, or higher class licence with a vehicle that is equipped with air brakes? As part of your road test, you are required to determine if the air brakes are in adjustment depending on your jurisdiction's requirements: either the pry bar or applied stroke method. Learn how to determine if your air brakes are in adjustment and correct the adjustment if they brakes are not in adjustment.
Smart Drive Test THANK RICK ,SAFETY FIRST👍
Thank you Carlos - for your comment. If there's anything else we can do, drop us a note. All the best, Cheers Rick
These methods were never demonstrated in my 2007 Community College CDL class. Now I’ve been driving for the big orange, mega carrier for a year. They never discussed or demonstrated this. If I’m going to be responsible for paying every fine I get as a commercial truck driver, then I need more education than just how to do a pre-/post-trip inspection. Any suggestions on training or suggested reading? I’ve looked at 49CFR regulations but there seems to be other publications to which these regs are attached. Here lately-while being a dedicated Wally World driver-I’ve flagged brake linings for borderline DOT failure, causing 1 reload already. Of course, I catch crap from my fellow drivers, telling me to just pick up the trailer and get going if I’m going to make more money.
In the final analysis, I don’t want a fine and I sure don’t want to hurt someone, including myself. I appreciate your feedback.
@@truckintowardretirement686 you are responsible for the safety of others and the load....screw those other super trucking idiots. They have a license to drive one vehicle at a time and yours isn't one of them. Being safe is a part of being a professional. All these wrecks out there put a target on our industry and that affects our pay. I haul bulk mail for a company and am home every night making 25 to 30 dollars an hour.
How do you determine if it’s an automatic Slack adjuster or not?
It's very unlikely that you'll encounter a manual slack adjuster, but just in case, see this video: th-cam.com/video/knbgfudCZC8/w-d-xo.html Drop us a note if you have questions. Cheers Rick
What a great video! Very informative and he's easy to learn from. I'm glad to see Tommy Lee Jones is keeping busy when he's off the silver screen! ;)
Hi Dylan Lunenburg - Thank you for your comment. And you are most welcome. We're happy to hear we could help out. I like to think I'm better looking than Tommy Lee... 👍 All the best, Cheers Rick
Taking a test to be a driver trainer (diesel bear)……you are the one that had the best answer,,, great to know you are teaching the right stuff.
Guys follow this gentleman….
Hi Tony Galicia - And you are most welcome. We're happy to hear we could help out. If there is anything further we can do, drop us a note. Always happy to help. All the best, Cheers Rick
When applied brake with 100psi. Normal driving foot pressure is used? I notice that if i l push as if panic stop.. It will overthrow.
Not sure why this is if it is limited to the 100psi.
Applying park brake usually seems to be most accurate.
I don’t know what you mean by “overthrow?” Please reword. Cheers Rick
@@smartdrivetest
Overstroke the pushrod.
In another manufacture video i noticed the chamber did the same when they applied on the training unit.
I am digging for information on proper operating system for diagnosis reasons. Allot of documentation just mentions to "find the problem". Trying to understand more of the workings (incorrect parts...).
I may have to get ahold of a manufacturer for indepth training.
lots of people would say " I have automatic slack adjusters... they check them self and adjust" but the rules state in BC, Even trucks with automatic slack adjusters installed, Brakes SHOULD be checked each day as if you didnt have auto installed"
Hi Fatcat Towing - Thank you for your comment. Automatic slack adjusters do not check their own adjustment my friend. According to law, you must check brake adjustment as part of your daily pre-trip inspection - as you stated. If there is anything further we can do, drop us a note. Always happy to help. All the best, Cheers Rick
"If you can't explain it simply, you don't understand it well enough." -Albert Einstein
Necessary and unnecessary info is given altogether,
This makes it hard to understand
Hi Huzur Sa - where are you in the world? You're struggling to learn something my friend. And yes, this is an older video that needs to be updated. However, all the pertinent information for measure push road stroke--either pry bar or mark & measure--is presented. All the best, Cheers Rick
He explained this as simply as one can. There is no "easy answer" when talking about an entire air system.
If you don't understand, slow down and listen again.
That was a very good video. Thank you for posting it. It will definitely be a big help for not only new drivers but new techs.
Hi jason - And you are most welcome. We're happy to hear we could help out. If there is anything further we can do, drop us a note. Always happy to help. All the best, Cheers Rick
I’m from California and every inspection I’ve gotten in California they used the applied brake test
Hi C & Z Trucking - it's not just CA my friend. Every DOT inspector in all the states is going to use the applied stroke method. The reason is that they have 2 people, which makes it easy. They just put a radio in the cab, and when they're ready to measure, they tell the driver to apply the brakes. And the applied method is way more accurate than the pry bar method. Drop us a note if we can help further my friend. All the best, Cheers Rick
@@smartdrivetest I found this video do to problems with trailer brakes. I’ve replace (i do all my work myself) the chambers, drums, pads, s-cams, and slack adjusters and no matter adjustments I make, the applied stroke goes to the maximum 2”. So I’m trying the 6 pack method you said in your video now to see if that works. And it’s all four on the trailer that go to the 2” limit
I'm not a technician, but it could be a couple of things: 1) the pushrods are too long; 2) the slack adjusters need to be adjusted manually. If you can't get it to work, I would counsel you to take it to a shop and have a mechanic have a look. All the best, Cheers Rick
Failure of automatic slack adjusters is not the only reason for out of adjustment brakes. You could also have worn brake linings or foundation brake parts issues that were not discussed in the video.
Hi Chris Lareau - Thank you for your comment. That is true my friend. With vehicles that get regular maintenance it tends to be more so the slack adjusters than other things. All the best, Cheers Rick
I just drank a whole six pack and my brakes still aren’t adjusted. Should I drink another one?
Hi.
I am in BC. In theirDriving comercial vehicule book, page 188, at the bottom... I got confused...
They wrote: "Pry method of free stroke measurement".
Now... I believe they meant to say: Pry method...or... Free stroke measurement...
Rrrrrrr.
Why didn’t you show the 6pack and see if the slack adjusters work so you can show what happens when it doesn’t.
When I drove set your Park brakes you know there'd and yellow buttons the blue buttons are rare these days look to see that applied there all at 90 degrees (push rod slack adjusters angle) then release the brakes (engine off and in low GEAR) All the angles should be the same and app 1 to 1.5 inches
THIS IS SELDOM THE CASE,,,,,, MECHANIC'S, BUSHING WEAR,,, DIFFERENT MANUFACTURER OF ALL THE CHAMBERS (MONEY ETC ISSUES)
AND AVOID DOT IF POSSIBLE,,, SOME ARE IDIOTS !!! AND DON'T KNOW WHAT THE REAL DEAL IS !!!! WRITE TICKETS MAKE MONEY.
TAKE CARE NOW.
With the pry bar method are there differences in free stroke travel between brake chamber types as well as standard stroke to long stroke? I just noticed that the width of the thumb is sort of a generalization. I'm from Ontario but now working in alberta. Just trying to learn the pry bar method now.
Hi Chris - nope, so long as it's not more than an inch, you're good to go. Ontario is the only province or state that I'm aware of that does the applied stroke method for measuring push-rod travel. Every other jurisdiction does the pry-bar method. See this vid too: th-cam.com/video/m5r3TsdQQQw/w-d-xo.html Drop us a note if we can help further. Oh yeah, in Alberta, the leak test is 2 minutes my friend. All the best, Cheers Rick
Great Vid! Is that yellow plastic called stroke indicator? My single axle dumper only has one pod with it.
Yes, those are stroke indicators my friend. They won't stand up in a DOT inspection, but they do help with the daily inspection if you know these are set right. All the best, Cheers Rick
I check every day. Never adjusted brakes. Always done by shop.
I am getting to where I need to do them. The shop has been slacking. Haha. You write them up, come back next day. Nothing done. Dvcr missing and an older one there with no write ups. We slip seat. This is real problem everyday.
Hi Robert Collins - Thank you for your comment. If there automatic slack adjuster, I would suggest trying a 6-pack first to adjust the slack adjuster. Just a note of caution: if you're adjusting automatic slack adjusters and something goes wrong--a traffic crash say--you could b held liable. If there is anything further we can do, drop us a note. Always happy to help. All the best, Cheers Rick
@@smartdrivetest thank you for the info. I am trying this 6 pack. I just cant believe that the shop has never told us about this. We could do this more often and use them last.
I feel kinda dumb I didn't learn this before. Guess I just figured automatic, is automatic.
Keep up the good training, now I found you- I will seek to keep learning. Everyday you can always learn something new.
Hi Robert Collins - you are most welcome my friend. We're happy to hear that we could help out. If the 6-pack doesn't work right away, try putting some grease to the slack adjuster and try again. Often the ratchet mechanism dries out and won't ratchet over, so a bit of grease tends to solve the problem. If not, then the adjuster needs to be replaced. All the best, Cheers Rick
Vudeos are amazing bro...❤ em
Hi Pakky - you are most welcome my friend. Drop us a note if we can help further my friend. All the best, Cheers Rick
While performing 6-pack action it was stated that you need to push a pedal three times and then release spring brakes - does it mean that between these steps it should be applied spring brakes and then these should be released? and when spring brakes should be applied in these steps? after which in this algorithm?
Full application of the brake pedal and then let the air pump back to maximum. There’s no application of the parking brakes my friend. Drop us a note if you have further questions. Cheers Rick
Didn’t understand a word. Start with the basics: What’s a pushrod? Visuals would be very helpful.
Where can I buy the push rod tabs? This would be very useful for our fleet.
Very precise and helpful, i just couldnt stop feeling like RED FORMON was teaching me the do's and dont's lol.
Hi Justin Davis - We're happy to hear we could help out. If there is anything further we can do, drop us a note. Always happy to help. All the best, Cheers Rick
I have a 95 kw and can't keep auto adjusters in. Changed them twice by good shops. Back up hit brakes. Nothing works would love to change them to manuals my trailers and other truck is old and check them once a week. Or every time I get in truck after been out of it for while.
Hi Scott coleman - Thank you for your comment. Every now and again I hear that about auto slacks. It's a perplexing issue I'm sure because all the components are mechanical. In other words, there aren't any electronic components that could foul up. If auto slacks are going amiss, it would lead me to think that manual slacks probably aren't going to solve the problem because there's something else going on. Do the technicians have any theories as to what causing the slacks to malfunction? All the best, Cheers Rick
Thanks rick vary well explained 👍 any videos on how to properly determine axle weights on super bs
Hi laurence belanger - And you are most welcome. We're happy to hear we could help out. If there is anything further we can do, drop us a note. Always happy to help. All the best, Cheers Rick
if your s-cam bushings are wore out, your automatic slack adjusters will exceed the 2" on the applied. So its not always the slack adjusters issue
Hi Mike grazio - Thanks for the information. Can't say I've every had equipment old enough that it wore out the bushings. All the best, Cheers Rick
You need to physically not verbally go thru the whole six pack method.
I have put it on my list of videos to make my friend. I will let you know when I get that done. All the best, Cheers Rick
Positive
Great video. However, The link to the brake chamber chart is broken. Could you please update it? Thanks!
Hi Bob Hakken - Thank you for letting us know about the broken link. Here is the update: www.smartdrivetest.com/cdl-air-brakes/chart-of-adjustment-limits If there is anything further we can do, drop us a note. Always happy to help. All the best, Cheers Rick
Daily check them a lot of O/O check once a week would be cool if you showed how to check trailer brakes with the hand brake applied.
I was taught to do 2 hard brakes when stopped at least a few times a day just in case you get stopped in my air brake course. Of course still pretrip them. Doing my class 1 MELT in Alberta next month.
Hi Colton Blumhagen - that's a good technique my friend. That's awesome that you're off to truck driving school next month. Have you started look for a job? Have a look here my friend: www.smartdrivetest.com/employment/ Drop us a note if we can help further. All the best, Cheers Rick
You check them everyday
Hi Ruben Bejarano - you are correct my friend. All the best, Cheers Rick
"Do the six-pack?" Okay...to "re-adjust" you pump the brakes 3x with (or without) tractor/trailer parking brakes on and them again with them off? Or with the parking brakes off for both sets of three pumps?
Hi Big Ol' Bear - Thank you for your comment. And you have the parking brakes off, but you will have to chock the wheels. If there is anything further we can do, drop us a note. Always happy to help. All the best, Cheers Rick
Thanks for the knowledge I just bought a Rv diesel pusher with air brakes and I want to know about air brakes
Hi Marco Casillas - Thank you for your comment. Congratulations on your new purchase. How many slides do you have my friend? These videos will help too my friend: th-cam.com/video/dMxilatT0qw/w-d-xo.html Drop us a note if we can help further. Always happy to help. All the best, Cheers Rick
Great Information
Listen… any repair that involves a 6 pack, I’m there! 😂
Question. On a steer axle pry bar check (air brakes )with the brakes applied should the push rod be able to be pulled out an inch? Or must the brakes be released during the pry bar test to check the push rod play?
Hi CONTENDER791 - Thank you for your comment and excellent query. For the steer axles you don't have to have the parking brakes released. There aren't parking/emergency brakes on the steer axles due to the fact that you don't want these to lock up in the event of an emergency. Yes, you can do a pry bar on the steer axle pushrods without having the parking brakes released. If there is anything further we can do, drop us a note. Always happy to help. All the best, Cheers Rick
CON5TENDER791
I got my CDL in 93 and I was taught that to check the slack adjusters you tightened the nut all the way down and backing it off by 1/4 turn. I never knew about measuring the rod. I have always worked for companies with maintenance schedules so I never had any trouble. Now I'm buying my own, I am reviewing some of these things I will be ultimately responsible for. I appreciate your video.
Hi Gregory Peterson - Thank you for your comment. And congratulations on getting your own truck! All the newer trucks are fitted with automatic slack adjusters so you won't have to adjust them up anymore. And for the purposes of liability, you probably don't want to do more than keeping these greased and measuring the push-rod travel my friend. All the best, Cheers Rick
I'm learning a lot from your videos, Your PDF Air Brakes Simply Explained and the NYS CDL Manual. In the NYS manual it does state that the this test can be done by hand. The first thought was "Yea, if you are 21 years old and that strong, sure you can". Not so easy without tools.
Learning something new is challenging to say the least.
Thank You Rick for your demonstration on the CDL Air Brake Check.
Hi Toby Dulanski - And you are most welcome. We're happy to hear we could help out. If there is anything further we can do, drop us a note. Always happy to help. All the best, Cheers Rick
Do you do a 6 pack while moving or stationary? Thanks for the knowledge! Havent seen the applied method before.
Park the vehicle in a safe location, chock the wheels and release the brakes. 3 hard applications, let the air build back to maximum and then 3 more. You should be good to go at that time. All the best, Cheers Rick
The 6 pack while moving is called a seatbelt check.
every time you pretrip truck and trailer do break adjustment check
Nice vide but very often and many times a repetition of what has been said before.
Brake checks daily
Awesome to hear my friend. You're one of the smarter drivers that looks after the equipment. All the very best, Cheers Rick
I enjoyed the video , I was trying to find out about brake adjustments, so this six pack should work. Thank you
I look forward to more.
Hi Art Hedrick - Thank you for your comment. And you are most welcome. If there is anything further we can do, drop us a note. Always happy to help. All the best, Cheers Rick
@@smartdrivetestshould we check the airbrake adjustment whenver we have new trailer?
Must be checked daily ! Is the answer to the last question lol
Good video Thanks
Hi Serhiy Ryabtsev - you are most welcome my friend. Drop us a note if we can help further my friend. All the best, Cheers Rick
How ofter should the driver do that , to check that .? Thanks
I'm loving all this
Hi friedchicken - you are most welcome my friend. Have a look at this vid too: th-cam.com/video/dMxilatT0qw/w-d-xo.html Drop us a note if we can help further. All the best, Cheers Rick
I get adjusted by a six pack every weekend😃
Hi mr c - Thank you for your comment. And too funny my friend! All the best, Cheers Rick
Where can I get those colored plastic tabs from?
Such an awesome 👌 instructor 👏👏👏👏👍👍👍👍
Hi GETREAL! - We're happy to hear we could help out. If there is anything further we can do, drop us a note. Always happy to help. All the best, Cheers Rick
Thanks for sharing Sir very informative tutorial
Hi jerry casana - you are most welcome my friend. Drop us a note if we can help further my friend. All the best, Cheers Rick
I see that 2" is the maximum range before adjustment, what is the minimum? Surely the push rod must move a little as it applies the brakes, how much does it move minimally when the brakes are new and adjusted? Thanks
Where can I get some of those yellow markers to put on mine?
Truck stop, any one of the dealerships may have those too. Give Amazon a look too. Cheers Rick
Great video, Rick. Where can you find those yellow push rod markers on the internet? Inquiring minds want to know. Thanks
Hi Miguel Rodriguez - Thank you for your query. You might find them at a truck stop. I suspect that you would find them at a truck parts store. All the best, Cheers Rick
Rookie here. Thank you so much. Great video.
Hi NCC2087 - you are most welcome my friend. Drop us a note if we can help further my friend. All the best, Cheers Rick
Do a six pack every end of shift. Check your brake adjustment. That way you can have things repaired if needed before you go back out. If not, you know your brakes are good to go for your pretrip.
Hi Steve Chapman - Thank you for your comment. I think a 6-pack everyday is going to be a bit of overkill my friend. I might suggest doing one every couple of weeks. In combination with checking the adjustment every day, I'm confident you'll be golden. If there is anything further we can do, drop us a note. Always happy to help. All the best, Cheers Rick
Thanks I really think this will help a person seeking getting a CDL license
Hi Veronica Calloway - And you are most welcome. We're happy to hear we could help out. If there is anything further we can do, drop us a note. Always happy to help. All the best, Cheers Rick
If you were a diesel bear asking me if I checked everyday I'd say yes. If I'm honest I'd say a few times a month on the tractor and if the trailer shoes have plenty of material I don't bother. I barely use my service brakes to slow the truck. Plan your stop in advance and give it full jake. The impatient fella behind you can go around.
All man thanks so much for the info buddy
Hi Grant Skinner - you are most welcome my friend. Drop us a note if we can help further my friend. All the best, Cheers Rick
'If you have a manual slack adjuster which is unlikely'
Working for a company right now that only just recently got new trailers with automatic brake adjusters
Every day 👍
Hi Jose Casiano - Always happy to help. All the best, Cheers Rick
great video. very informative. Do you have a video where you adjust air break because it really needs adjustment? Im reading air brake adjustment book, i would really love to see it in action. Im trying to get my DL Class1.
Hi Bernard Mallari - Thank you for your comment and query. And this is the video you seek: th-cam.com/video/knbgfudCZC8/w-d-xo.html&list=PL0x-bChcUvwG2bSWReQWnk9Tm92L7WN_O If there is anything further we can do, drop us a note. Always happy to help. All the best, Cheers Rick
Very nicely explained
hi my name is Joseph and 57 years old considering in getting into truck driving school and I hear so much about the jake brake . can you do a video class on the jake brake?
Hi Joseph Sikora - thank you for your comment and query. Awesome suggestion. I'm working on getting some equipment. As soon as that happens, I'll get that video done for you. All the best, Cheers Rick
If you have further questions, drop us a note. Always happy to help. All the best, Cheers Rick
6 Pack is old news unless you rebuild the air over 90 after every second application- preferred version 2 pack, 3 times if necessary.
Hi TrewFred - Thank you for your comment. Isn't a 2 pack X 3 the same as a 6 pack? ;oP All the best, Cheers Rick
Smart Drive Test well, no. Some times you need 12 and mostly it only takes 2 to maintain correct stroke.
Thanks for your reply my friend. Cheers Rick
on the applied brake check being out of adjustment at maximum 2 inches, what is the minimum push rod stroke allowed at a 100 psi applied brake application ? or is that just minus the maximum allowable free slack being 3/4 of an inch making it 1 1/4 inches ?
Very good
Glad you enjoyed it! Always happy to help out. Cheers Rick
Which is different from the Short Stroke method😊
On a tractor trailer, truck only how many slack adjusters are there? I am guessing for two for the stairs, take exit Miami on the right to choose for each drive axle on the inside of each axle beside the tires on the inside.
The pry method messed me up, I've been driving about a year since I passed the ICBC class 1 tests and believed this 1/2 - 3/4" was a rule. So one day I'm doing a pre trip on an assigned truck and two of the pushrods measure over 3/4" of free stroke and one well over an inch! Well it went to the mechanics and they said it's fine with no explanation why, this happened a second time and still no one explained to me why the brakes could be fine even though I could pry over an inch of travel out of one of them.
I finally phoned CVSE at the Hope scale and he told me that whatever ICBC is teaching doesn't hold any legal bearing and that I could very well pry more than an inch and they could be still in adjustment.
Applied stroke method from now on so I know I'm not being lied to about the legality of the brakes by my employer, wish ICBC would require applied stroke as well.
Hi Mohan Churchman - Thank you for your comment. And yes, the pry bar method isn't always accurate. Most of the time you can use the pry bar, and then if it doesn't work, you use the applied stroke. The reason they use the pry bar is because is less complicated and takes less time than the applied stroke. If it's less complicated and takes less time, than drivers are more likely to check the brakes. If there is anything further we can do, drop us a note. Always happy to help. All the best, Cheers Rick
Try talking to shop to get a new tire, " it has legal tread they say." I keep pointing out flat spots. Finally got a new tire.
With that note, I am looking for a video on better tire explanations. I hope you have one or will soon.
Robert Collins I hear you, makes you wonder what regulations their reading when they keep telling you that tire is fine when it has clearly worn down below a millimetre in some spots. Of course they can tell you this 5000 miles away from a photo they requested and they haven't been around a truck in the last decade let alone driven one.
@@HavingAnAverageWeeke I was at the shop. Trying to settle this. I finally got a new tire 7.
.
Hi Robert Collins - Thank you for your comment. And yes, if there are flat spots, the tire needs to be replaced. This video may give further explanation: th-cam.com/video/RkHIt3bxdxc/w-d-xo.html If there is anything further we can do, drop us a note. Always happy to help. All the best, Cheers Rick
Don’t bother the guy in the shop can get it lol
I have a problem with air brakes in rear of an RV with 20,000 lb axel. left hand wheel was making an unusual sound when applying brakes. I chocked the wheels .had air pressure between 60 and 90 psi, released park brake marked the push rod with marker and my wife applied brakes while I measured the stroke. The problem wheel only had one in. stroke and other was just over 2 in. I also did the pry bar test per video instructions and both rods had 3/4 inch stroke. any ideas what is going on. We are from canada but in calif now and have to wait one week to get it checked would like to try something else in mean time.
Hi john kavalchuk - Thank you for your comment. If you have a push rod stroke more than 2", little doubt the brake is out of adjustment. I would suggest trying a 6-pack. Chock the wheels, release the parking brake, and build system pressure to maximum. At maximum, the air dryer will purge and the air gauge needle will be between 100 and 135psi. Make 3 full hard brake pedal applications. Let the pressure built to maximum again, and do 3 more hard full brake application. Remeasure the push-rod stroke. If it's still out of adjustment, you might be able to put some grease to the slack adjuster and try the 6-pack again. Some times these seize up because they haven't been greased in a bit. When you measure the push rod stroke using the applied method as you did, ensure that the system air pressure is at maximum. If that doesn't work, you may have to replace the slack adjuster. Let me know if that works. All the best, Cheers Rick
I like to use a ball joint pickle fork. makes things easier. just get a short handle one if your working in tight space.
Hi Wrax Artilles - Thank you for your comment and help for others. I suspect that tool would work very well for checking brake adjustment. If there is anything further we can do, drop us a note. Always happy to help. All the best, Cheers Rick
Where can I get those plastic tabs or should I just make my own?
Hi Appalachian American - Thank you for your question. Often you can get them at a truck parts store, truck stop, or at a dealership my friend. All the best, Cheers Rick
Excellent video, thanks so much
Hi Trucker camionero - you are most welcome my friend. Drop us a note if we can help further my friend. All the best, Cheers Rick
Very helpfu & informative
Hi H Debesai - Thank you for your comment. And you are most welcome. We're happy to hear we could help out. If there is anything further we can do, drop us a note. Always happy to help. All the best, Cheers Rick
Good job on this illustration, keep up the great work!
Hi Driver Bank - you are most welcome my friend. Drop us a note if we can help further my friend. All the best, Cheers Rick
if the brake chamber rod is not the correct length it will affect how the ASA works. especially that type of slack on the trailer. the double yolk has lots of wear being outside in the elements, and that slack is about a 6 in reliability anyways. some slacks adjust on the push stroke and some slacks adjust on the return stroke. so your six pack method only works on some slacks not all.
Hi First Name - Thank you for your comment. And you are correct my friend - it's not going to work all the time, but it's worth a go before taking it into the shop. All the best, Cheers Rick
Answer: Pre trip inspection says you have to check the slack every day.
paint the rod and the area around the rod white- makes for a easy glance for inspecting.
Thanks for the info 👍 helpful it was.
Hi owen Ja - And you are most welcome. We're happy to hear we could help out. If there is anything further we can do, drop us a note. Always happy to help. All the best, Cheers Rick
according to pre trip rules it should be done everyday
You are correct my friend. Also, when you get new equipment, or you switch with another driver. See this vid: th-cam.com/video/IsiVy0M3YSU/w-d-xo.html Drop us a note if your have further questions, or we can help out. All the best, Cheers Rick
Thank you very interesting.
Hi Jhoe Fernandez - you are most welcome my friend. Drop us a note if we can help further my friend. All the best, Cheers Rick
Where did you buy your pry bar. How long is it? I live in Vancouver.