Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 07-30-2022, 11:47 AM   #1
Senior Member
 
gpounder's Avatar
 
Join Date: Nov 2017
Location: Oakhurst, CA
Posts: 828
Do you do a AIR BRAKE TEST? Do you know how too?

Do you do a AIR BRAKE TEST? Do you know how too?

I admit I have been lazy and do not do it very often but I should do it every time before driving. Today while the engine was off while doing other things I touched the brakes and heard a continuous air sound. That is bad. You should not hear air when holding the brake at a steady pressure. I would not hear this with the engine running.

So what are the numbers?

Max pres (governor turn off pressure)?
Max leakage, no brake?
Max leakage with brake?
Warning light pressure?
Automatic parking brake activation pressure?
Minimum governor kick in pressure?
Compressor pressure build rate?

Do you actually know how the air brake system works? Did you know they are called spring brakes?
Test yourself

How to do a air brake test CDL
__________________
2007 Country Coach Tribute 260 Sequoia
40' DP w/Cat400, F494513, Lithium Battery & Solar
Live next to Yosemite
gpounder is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 07-30-2022, 12:03 PM   #2
Community Administrator
 
Lt Dan's Avatar


 
Tiffin Owners Club
Join Date: Sep 2013
Location: DFW, Texas
Posts: 15,469
I don't do a brake test every time I start up, but I do one at the beginning of any trip and every couple of weeks otherwise. Doing a brake test in a RV park in the morning would get some interesting stares.
__________________
2017 Phaeton 40IH XSH Maroon Coral - Power Glide Chassis with IFS
Previously '15 Tiffin Allegro RED 38QRA and '06 Itasca Sunrise 35A
'16 Jeep JKU Wrangler Sahara or '08 Honda Goldwing
Lt Dan is offline   Reply With Quote
Old 07-30-2022, 12:40 PM   #3
Senior Member
 
FL420's Avatar
 
Join Date: Jan 2018
Posts: 3,009
Yes. I have posted the procedure several times on this forum. Like Lt Dan I don't do it in the campsite but at a suitable location away from other campers as soon as practicable.
...
__________________
2005 Monaco Knight 40PLQ; Cummins 8.3L ISC330, Pacbrake, Allison 3000, Roadmaster RR8R, ScanGauge D, 2004 Kawasaki Vulcan VN750(Geezer Glide) on a Versahaul carrier pulling a 2013 Kia Soul+; 2.0L, 6 speed Sport shifter(great car) on an American Car Dolly(great dolly.)
FL420 is offline   Reply With Quote
Old 07-30-2022, 10:16 PM   #4
Senior Member
 
Ray,IN's Avatar
 
Join Date: Aug 2001
Location: North America somewhere
Posts: 26,663
Lt. Dan X3. A few years ago I was getting ready to leave our winter park and the man beside me was towing a 5er with a HDT, he asked me this question so I explained I would do the test after pulling out of the RV site down at the hookup area, then told him how I understand the procedure.(I have a printed sheet in the MH)

He shook my hand and congratulated me for being safety minded.


Even many MH drivers do not realize a vehicle with properly working air brakes requires more stopping distance than hydraulic brakes due to air pressure delay.
reference:https://trucksmart.udot.utah.gov/stopping-distances/
__________________
2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA." My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
Ray,IN is offline   Reply With Quote
Old 07-31-2022, 05:22 PM   #5
Senior Member
 
Join Date: Apr 2015
Location: Rogers, AR
Posts: 1,825
Originally posted by gpounder

Do you actually know how the air brake system works? Did you know they are called spring brakes?

I am curious as to why you think the air brake system is called spring brakes?
__________________
2019 Fleetwood Discovery LXE 40M w/2021 Equinox
alank is offline   Reply With Quote
Old 07-31-2022, 05:26 PM   #6
Senior Member
 
Join Date: Oct 2014
Posts: 5,824
Quote:
Originally Posted by alank View Post
Originally posted by gpounder

Do you actually know how the air brake system works? Did you know they are called spring brakes?

I am curious as to why you think the air brake system is called spring brakes?

Ya, the SERVICE BRAKES/brake pedal are air applied.


The parking/emergency brake is spring applied, air released.


So you have BOTH.
__________________
Brett Wolfe
Ex: 2003 Alpine 38FDDS. Ex: 1997 Safari Sahara. Ex: 1993 Foretravel U240
wolfe10 is offline   Reply With Quote
Old 07-31-2022, 06:04 PM   #7
Senior Member
 
Join Date: Jul 2014
Posts: 31,193
And spring brakes are only on drive axles.
twinboat is offline   Reply With Quote
Old 07-31-2022, 07:59 PM   #8
Senior Member
 
GOLDWINGER2's Avatar
 
Vintage RV Owners Club
Fleetwood Owners Club
Join Date: Dec 2009
Location: CA
Posts: 1,264
Yes, as a school bus driver I must perform the brake test before picking up students. The spring brake test was not required for a few years in the past, bit it is back in force at this time. We also have to perform a hydraulic test if so equipped. Actually we have to perform
a complete documented pre-trip.
__________________
1988 PACE ARROW
P30, 454 ENG, TURBO 400 TRANS
TOWING '80 WING OR 2006 AVALON
GOLDWINGER2 is offline   Reply With Quote
Old 08-01-2022, 03:40 AM   #9
Senior Member
 
Ray,IN's Avatar
 
Join Date: Aug 2001
Location: North America somewhere
Posts: 26,663
Quote:
Originally Posted by alank View Post
Originally posted by gpounder

Do you actually know how the air brake system works? Did you know they are called spring brakes?

I am curious as to why you think the air brake system is called spring brakes?

This will fully explain everything about an air brake system: Bendix Air Brake handbook.


I have never understood why anyone in my state can buy/operate a 50,000# MH with air brakes, yet know nothing about maintaining/testing the air-powered braking system.
__________________
2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA." My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
Ray,IN is offline   Reply With Quote
Old 08-01-2022, 12:13 PM   #10
"Formerly Diplomat Don"
 
Dutch Star Don's Avatar
 
Newmar Owners Club
Join Date: Apr 2005
Location: Moorpark, Ca.
Posts: 21,120
I've owned a DP since 2005 and I've never done a brake check. I know how to do it but have never seen the need. I know my coach; I know how it airs up and tanks fill. I know when the brakes release and if there is an issue. If there are no issues during start up, I don't do anything else to check. Not one brake issue in 18 years.

There are tractor trailers where a commercial driver is connecting to a trailer he has never seen or used before. They have a need to do a brake check as the condition of the trailer is unknown. We aren't driving or connecting to unknow vehicles, they're our personal vehicles that you know their condition and you KNOW when something odd occurs during start up or first movement.

I know many say they do it, but in 50 plus years or RVing, I never seen it done ONCE at a campground. Maybe they're doing it in secret, under the cover of darkness.
__________________
Don & Mary
2019 Newmar Dutch Star 4018 (Freightliner)
2019 Ford Raptor
Dutch Star Don is offline   Reply With Quote
Old 08-01-2022, 09:20 PM   #11
Senior Member
 
FL420's Avatar
 
Join Date: Jan 2018
Posts: 3,009
Quote:
Originally Posted by Dutch Star Don View Post
I've owned a DP since 2005 and I've never done a brake check. I know how to do it but have never seen the need. I know my coach; I know how it airs up and tanks fill. I know when the brakes release and if there is an issue. If there are no issues during start up, I don't do anything else to check. Not one brake issue in 18 years.



There are tractor trailers where a commercial driver is connecting to a trailer he has never seen or used before. They have a need to do a brake check as the condition of the trailer is unknown. We aren't driving or connecting to unknow vehicles, they're our personal vehicles that you know their condition and you KNOW when something odd occurs during start up or first movement.



I know many say they do it, but in 50 plus years or RVing, I never seen it done ONCE at a campground. Maybe they're doing it in secret, under the cover of darkness.
Sorry to hear that.

...
__________________
2005 Monaco Knight 40PLQ; Cummins 8.3L ISC330, Pacbrake, Allison 3000, Roadmaster RR8R, ScanGauge D, 2004 Kawasaki Vulcan VN750(Geezer Glide) on a Versahaul carrier pulling a 2013 Kia Soul+; 2.0L, 6 speed Sport shifter(great car) on an American Car Dolly(great dolly.)
FL420 is offline   Reply With Quote
Old 08-02-2022, 07:11 AM   #12
Senior Member
 
Join Date: Mar 2014
Location: Center Valley, Pa
Posts: 133
Unfortunately in Pa we have a class B motorhome endorsement. I took it 4 years ago and the first thing they ask is to do a brake test. It is an automatic fail if can't. At that point there was no criteria for the endorsement so I did not know the correct protocol and failed. learned it in 5 minutes (online and part of any commercial test) and passed it the second time. The major item he looked for was the activation of the emergency at 30 psi.
__________________
Bill and Audrey
2009 Dutchstar 4043
2014 Honda Cr-V
wlw209 is offline   Reply With Quote
Old 08-02-2022, 03:00 PM   #13
Senior Member
 
F239141's Avatar
 
Vintage RV Owners Club
Workhorse Chassis Owner
Heartland RV Club
Join Date: Dec 2012
Location: Fairhope, AL / Reedley, CA
Posts: 476
If you don't know what a DOT air brake or leak down test is or don't do one you have no business driving an air brake vehicle.

Unfortunately, most have no clue and really shouldn't be on the road.
__________________
Good Sam Charter Lifetime Member 269454, FMCA 239141
2019 Heartland Mallard IDM33 Bumper Pull
1988 Mallard 27SB Motorhome P30 454/TH475/Banks Power
F239141 is offline   Reply With Quote
Old 08-02-2022, 03:49 PM   #14
"Formerly Diplomat Don"
 
Dutch Star Don's Avatar
 
Newmar Owners Club
Join Date: Apr 2005
Location: Moorpark, Ca.
Posts: 21,120
Quote:
Originally Posted by F239141 View Post
If you don't know what a DOT air brake or leak down test is or don't do one you have no business driving an air brake vehicle.

Unfortunately, most have no clue and really shouldn't be on the road.
Next time you're camping, please feel free to take a photo or even better, a video of all those doing an air brake check before they depart.
__________________
Don & Mary
2019 Newmar Dutch Star 4018 (Freightliner)
2019 Ford Raptor
Dutch Star Don is offline   Reply With Quote
Reply

Tags
air, brake, test



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Too high / too low / too high RTegarini Allison Transmission Forum 15 06-25-2018 06:30 PM
You donít know what you donít know! 62_inrightlane Class A Motorhome Discussions 12 03-19-2012 06:21 AM
How do I know if my roof air has heat strips too? dukenrock Fleetwood Owner's Forum 3 12-13-2010 05:44 PM
Test - Test - Test Jim28730 Test Your Changes 0 09-14-2009 08:14 AM
You know you have spent too much time camping when.... Lil'Darlin1972 iRV2.com General Discussion 12 04-19-2007 01:36 PM

» Featured Campgrounds

Reviews provided by


All times are GMT -6. The time now is 10:02 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.