Full load, grades, no engine brake

Just the fact you e done it so long a d are still around keeps me reading you and folks like you. I never considered the steady brake method, I too thought that would lead to a sure wheel fire. However, if only option, it is what it is. Is there a set distance you will ride the brakes like that before cooling them and what is the cool down procedure at bottom? Thank in advance!

 

seriously tho...goin down a mtn too fast is no joke....we had a trk about a year or so ago, that the jake didnt work...and we ran the mtns....gotta be in the proper gear....even if it doesnt look that steep, if its long..then you still need to stay slowed down....

dont let someone else tell you how to drive your truck on the cb...you will have some that come up and tell ya to speed up....or try to push you...DONT LET THEM....

 

The recommended method in the CDL manual is exactly that, the recommended method. But it is not for any reason I've seen while scanning this thread. Those who stated studies show that this method is superior to light steady braking because of the heat buildup difference and cite physics as the reason are mistaken as well. They arrived at the correct answer with the wrong data. Those who questioned the intelligence of others were equally guilty. Its always humorous to see intelligence questioned, and then supported with incorrect statements.

Here's the deal. If you were to take two identical tractor trailers going down the same mountain, and snub one, and use light steady pressure one the other after making certain it's brakes were pneumatically balanced the average heat buildup is virtually the same and indistinguishable (Refer to University of Michigan Transportation Research Institute study done at 7% for 5 miles as well as others). They are after all in the end doing the same work over the same distance. The problem with the steady pressure method is that you can never be sure the brakes are pneumatically balanced (And in fact they almost never are), as there is no real way for a driver to check it, and no real way to maintain it.
Tractor and trailer service relay valves for instance have different crack pressures with the trailer crack pressure usually being lower. This would indicate that with the light steady pressure method the trailer brakes could/would apply and the tractor brakes likely would not (At least not initially), which means you usually may initially begin with 4 brakes doing the work rather than 10. When snub braking you usually are going to apply 20-30+ psi of application, which is more than ample to apply all 10 sets of brakes. Now your application initially has 10 sets of brakes doing the work rather than 4.

In a nutshell pneumatic imbalance with light steady braking is why snub baking is now the recommended method. Both methods can and do work, but snub braking holds the edge because of this almost assured and in most cases designed pneumatic imbalance with continuous light steady pressure. Vehicles with poor pneumatic brake balance fare better using snub braking than they do using continuous light steady pressure. Vehicles with good pneumatic brake balance fare equally well using either method.

As an added note, mechanical adjustment of the brakes or adjustment imbalance is not aided by snub braking. This would be a torque issue which snub braking does not/cannot compensate for.

Best regards

 

Dont listen to this Chinatown Guy, Im surprised hes still alive.. I go down Mt. Eagle or Fancy Gap in 6th gear snubbing and I have no Jake or retarder of anykind. My rpms for the decend between 1500 and 1900.. At the end of the fall you dont give fuel, just upshift as needed..Remember you can still hit run away speeds if you give fuel. Just make sure your at the end. Not 2 miles from it... I agree with you losttrucker hes crazy!

 

I think your statement was crazy as well Ive been out here since 1987 and are surprised your still around. Oh and O/Os only slow down to save their own brakes on normal stopping. Ive never seen anyone just use trl brkes to come down a Mt. If they did theyd have one hell of a fire on their trl brake system.

 

By God Ive got 32 years experience!! Years of exp doesnt equate to intelligence!!

If it did those old guys wouldnt be sitting at the lunch counter crying and moaning about the same thing they were in the '90's

Lets look at it this way; this is a question in the NEW drivers forum!! What if theyre studying for their test or out on a road test and apply THE OLD method and fail!! You wanna give the advice of THE OLD WAYS go to the "Experienced Truckers Advice" forum!!

So..............

I could care less if you "think" im " far from a skillfull and experienced driver" All of this based on my posts?? WOW Your good!!

Calling someone an internet troll just because their opinon is different then yours AND they dont mind telling you about it equates to a little kid on the playground screaming " IM TAKING MY BALL AND GOING HOME".......You pretty much sumed up your maturity level when you said "I dare you" on your previous post

Im soo sorry I didnt bow down and get all googley eyed from your vast years of experience or your chilling story of how you mastered SuperTrucker Creek Canyon; crap like that doesnt matter. You want to offer old advice; go to experienced truckers advice. You want to reminisce on your old adventures; post em in Trucker Stories

FLAME AWAY

 

i do have a question LOSTTRUCKER....and i have no fight in this...i am just curious...it says you have 39 yrs exp...and yet your age is 32???? aside from that...i aint gettin in it.....

 

Must be ALOT of big hills in that parking lot, huh? Theres been alot of changes in the 15 YEARS youve been off the road............

Well I did learn something new!! I never knew alot of that technology was around in 1998!! (and im serious about that)

 

Just to prove a point really. We are on the internet, anyone can say anything they want. That number means squat; the only thing that matters is the information posted BUT way too many of the "ol' timers" up here feel superior because they've done it longer; what is it they do differently then the millions of newbies who do it day in and day out??

Accidents, stupid mistakes?? Did any of the ol' timers ever do something like this?? According to them NO!! They were thrown the keys and told to drive and never looked back!! How is it then that accidents per mile traveled keep going down even though the number of trucks and the volume of traffic has risen 500% (my numbers lol)

Really I'm just tired of the people who think just because they have some unproven number up there that there posts have more value then others.

 

Cadec, one of the first elogs, was around in 1988 when I first used it. We had a Windows PC, but the Cadec was on a MSDOS interface. Thankfully menu driven, and not command line.