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Question for the newbies.


runaway parents

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I know all you old time truck drivers know this . But lets try to teach a newbie  something new .Here is the question . Your driving down the highway at a speed of lets say 70 mph then all of the sudden your brakes lock up .Do you get off the throttle and stop? Or do you punch the throttle and get to a safe place to get off the road.? Let the debate begin. This should be fun.

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Punch the throttle all you want. If your brakes are truly locked, you won't accomplish anything. No debate. If you're asking if you cut an airline, and loose air pressure rapidly, then you'll have a few seconds to minutes from the time the alarm sounds until the brakes lock.

I have been wrong before, I'll probably be wrong again. 

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If you loose air to the spring brakes you need to keep your foot in the pedal and find a shoulder.       The spring brakes won't necessarily lock up your back wheels at 70, bobtail perhaps they would try.   

Steve

 

2005 Peterbilt 387-112 Baby Cat 9 speed U-shift

1996/2016 remod Teton Royal Atlanta

1996 Kentucky 48 single drop stacker garage project

 catdiesellogo.jpg.e96e571c41096ef39b447f78b9c2027c.jpg Pulls like a train, sounds like a plane....faster than a Cheetah sniffin cocaine.   

 

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46 minutes ago, runaway parents said:

BINGOI!!!!!!!!!!!!!!!!!!!!!!!!!!!

I'm confused.  In your original post, you set a scenario with locked brakes, now you're agreeing the brakes won't lock?

KW T-680, POPEMOBILE
Newmar X-Aire, VATICAN
Lots of old motorcycles, Moto Guzzi Griso and Spyder F3 currently in the front row
Young enough to play in the dirt as a retired farmer.
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Assuming you are looking into converting to spring brake modulation (aka straight truck air, aka rigid) before the new bed goes on?  And thus the question?  If you bed + stuff = more than 2000lbs then yes, you gotta do it.

Page 2: https://www.macktrucks.com/-/media/files/body-builder/manuals/5-brakes.pdf

Page 25: https://www.volvotrucks.ca/-/media/vtna/files/shared/body-builder/manuals/volvo_section-5-brakes.pdf

Dunno what valves Volvos use but 30% of NA use this (or at least used to in 2012):

 

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10 hours ago, rickeieio said:

I'm confused.  In your original post, you set a scenario with locked brakes, now you're agreeing the brakes won't lock?

Ok lets try to explain this regardless of whether the brakes lock or don't lock . I do not think it would be a good idea to get off the throttle because of the tailgater  you have hidden in your blind spot that is going to run up your backside.do not know if this rates as "Expert Advice" but makes sense to me

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Okay, that makes sense.  

Now you got me think'n.....  Many of us run with our engine brakes enabled, so that when we let off the throttle, we have a pretty decent rate of deceleration, with no brake lights.  This was pointed out to me one time when my bride was following on the interstate, and she saw a person who was following a bit close, nearly run into my back end.

This has been bantered about before, but it's still something of which to be aware.

KW T-680, POPEMOBILE
Newmar X-Aire, VATICAN
Lots of old motorcycles, Moto Guzzi Griso and Spyder F3 currently in the front row
Young enough to play in the dirt as a retired farmer.
contact me at rickeieio@yahoo.com

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Rick,

I may be wrong but on new trucks I believe the brake lights activate when the engine brake activates regardless if the brake pedal is pushed.  Can anyone confirm?

2006 Volvo 780 "Hoss" Volvo D12, 465hp, 1650 ft/lbs tq., ultrashift

Bed Build by "JW Morgan's Custom Welding"

2017 DRV 39DBRS3

2013 Smart Passion Coupe "Itty Bitty"

 

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1 hour ago, SuiteSuccess said:

Rick,

I may be wrong but on new trucks I believe the brake lights activate when the engine brake activates regardless if the brake pedal is pushed.  Can anyone confirm?

Newer, yes. Older, no.

I have been wrong before, I'll probably be wrong again. 

2000 Kenworth T 2000 w/N-14 and 10 speed Gen1 Autoshift, deck built by Star Fabrication
2006 smart fourtwo cdi cabriolet
2007 32.5' Fleetwood Quantum


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XXXX-2005 = special handwired option (non T2, usually only on Brakesaver trucks), 05-'10 without and with is only dealer programmable, 10-13 standard position without and optionable with, 13-18 standard position with and optional without, 2018+ is only with but follows a decel algorithm to turn them on instead of flashing all the time.  Has to accomodate regen braking for electric trucks as well.

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Well, looks like Scrap nailed your question Carl. I know that our truck activates the trailer and truck brake lights when the Jakes are on. I think there are several states (California, Illinois, or Colorado and all of Canada I'm pretty sure of) that require them to activate when the Jake brakes are active on 2015 and newer trucks. I prefer them coming on when the Jakes are active as a safety feature even though it makes me look stupid like I am riding the brakes on a long downhill

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2015 DRV 38RSSA Elite Suites
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36 minutes ago, GeorgiaHybrid said:

I prefer them coming on when the Jakes are active as a safety feature even though it makes me look stupid like I am riding the brakes on a long downhill

 

Let me take this opportunity to apologize to those drivers of late model trucks we have followed on downhills when I would mention to DW that they don't know what they are doing. 😀

However, I'm glad to know that will be a feature on our HDT.

Roger and my wonderful wife Margaret
2016 Dodge Ram 3500 DRW
2017 Luxe 39fb 5th Wheel
Pioneer Camping Club
Wagon Masters

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9 hours ago, GeorgiaHybrid said:

Well, looks like Scrap nailed your question Carl. I know that our truck activates the trailer and truck brake lights when the Jakes are on. I think there are several states (California, Illinois, or Colorado and all of Canada I'm pretty sure of) that require them to activate when the Jake brakes are active on 2015 and newer trucks. I prefer them coming on when the Jakes are active as a safety feature even though it makes me look stupid like I am riding the brakes on a long downhill

Canada does not require them!! 

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22 hours ago, Scrap said:

XXXX-2005 = special handwired option (non T2, usually only on Brakesaver trucks), 05-'10 without and with is only dealer programmable, 10-13 standard position without and optionable with, 13-18 standard position with and optional without, 2018+ is only with but follows a decel algorithm to turn them on instead of flashing all the time.  Has to accomodate regen braking for electric trucks as well.

I just got a new T880 at work we had the dealer turn the brake light with the jake off. love my new truck. 

2011 Volvo D13 485/1750  Eaton 13 Speed

2016 Montana 3820FK

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On 11/18/2018 at 7:20 PM, runaway parents said:

I know all you old time truck drivers know this . But lets try to teach a newbie  something new .Here is the question . Your driving down the highway at a speed of lets say 70 mph then all of the sudden your brakes lock up .Do you get off the throttle and stop? Or do you punch the throttle and get to a safe place to get off the road.? Let the debate begin. This should be fun.

This is what happens when you do NOT punch the throttle and you have another tractor tailgating you......and another one beside you when the tailgater rams you in the rear. 
i-cCdQFBQ.jpg

BUT, it is very counter-intuitive to hammer down on the throttle when your truck suddenly decelerates all by itself. Kinda like remembering to hammer down when a front tire blows. Neither one "feels right". 

MY PEOPLE SKILLS ARE JUST FINE.
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2005 Volvo 780 VED12 465hp / Freedomline transmission
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2014 smart Fortwo

 

 
 
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On 11/20/2018 at 10:43 AM, GeorgiaHybrid said:

Well, looks like Scrap nailed your question Carl. I know that our truck activates the trailer and truck brake lights when the Jakes are on. I think there are several states (California, Illinois, or Colorado and all of Canada I'm pretty sure of) that require them to activate when the Jake brakes are active on 2015 and newer trucks. I prefer them coming on when the Jakes are active as a safety feature even though it makes me look stupid like I am riding the brakes on a long downhill

Well that certainly explains some trucks that I wondered where the smoke was as I thought they rode their brakes all the way down the hill. :D

Dan (Class of 2017) - 2012 Ram 3500 & 2005 Alpenlite Valhalla 29RK
Contact me at rvsolarconsulting.com or Two Wheel Ramblin

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Whoa, that's a whole nother level!  Last spring we had a big office argument over how steady PTO RPM needs to be, so they sent me out ride with a slinger guy around us for half a week.  I sucked.  Bad.  First load Monday morning we beat our way all the way deep into downtown, park next to this bent over fence, fold her out, and have to fling a truckload of rock into a little piling square four stories down in a sky scraper sized hole in the dirt....😲  I thought I'd get step by step instructions from him before starting but ohhhh no, he yelled something about peeing a perfect dot in the snow and flipped on the belt!😏

I guarantee you we have the steadiest PTO RPM in the biz now...

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On November 21, 2018 at 8:12 PM, Big5er said:

This is what happens when you do NOT punch the throttle and you have another tractor tailgating you......and another one beside you when the tailgater rams you in the rear. 
i-cCdQFBQ.jpg

BUT, it is very counter-intuitive to hammer down on the throttle when your truck suddenly decelerates all by itself. Kinda like remembering to hammer down when a front tire blows. Neither one "feels right". 

 

A lot like putting a automatic in neutral when you can't stop on snow or ice. Just in case it has never happened to you, the front brakes lockup and the engine keeps pushing you and you can't steer or stop. I Knew not to hit the brakes for a front blowout but never thought to give it more gas. Got any other tips like that. 

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