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.
  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 09-25-2016, 07:58 PM   #15
Senior Member
Join Date: Aug 2015
Posts: 162
Air brakes

RufusEarl pay attention to the following comments please

1- An air compressors performance is measured by it`s capacity to build air pressure from 50 to 90 PSI in 3 minutes or less with the engine running at 1200 RPM. This is known as compressor build up time. Excessive build up time is caused by:
-A plugged compressor intake
-Excessive system leakage
-A faulty or worn out compressor

2- The governor limits maximum normal operating air pressure at 120-135 PSI. As previous poster mentioned this is your cut out pressure.........this is when the governor cuts out the compressor preventing further air pressure build up.

3- As the driver uses the brakes , air pressure in the system drops as air is delivered from the tanks. When system pressure drops by 20-25 PSI the governor causes the compressor to cut-in and more air is supplied to tanks.

4-If cut-out or cut in pressures are not within these specs governor - system maintenance must be performed by a Heavy Equipment Tech.

5-The air dryer integrated system (AD-IS ) combines the governor ,dryer,safety valve and supply tank into ONE system. If you possibly have miss- matched components you have trouble......and it sounds like you do.

6-There are all types of repairs associated with a Motor Home......do not attempt backyard repairs on the air brake system. You owe it to the motoring public to have your unit professionally repaired before you go anywhere.
Not trying to be rude.......I have experience with these systems.

RIDER FAN 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 09-25-2016, 11:48 PM   #16
Senior Member
Join Date: Jun 2016
Location: Nine Mile Falls WA / Arizona City AZ
Posts: 632
rider fan is correct.... the company I owned used to rebuild these compressors and I can share that 80% of the units returned to us as cores had no issues other than some other issue in the air system that was in correctly diagnosed... I've not read enough in this thread to offer more information.....

Except that... I'd like to know what the first problem was... that required the replacement of both the drier and the compressor...

Retired Business Owner, Re-manufacturing HD Clutches, Brake Shoes, Air Compressors, Sales & Installation of PacBrake and other Industrial Friction
jelag is offline   Reply With Quote
Old 09-26-2016, 09:26 PM   #17
Senior Member
Rich-n-Linda's Avatar
Join Date: Nov 2011
Posts: 884
Rich-n-Linda is offline   Reply With Quote
Old 09-27-2016, 10:15 AM   #18
Senior Member
Join Date: Aug 2015
Posts: 162
Air Brakes

Gee Rich , I,m an old guy and can't de-code your "Troll" remark.
Care to comment on your real thoughts............
RIDER FAN is offline   Reply With Quote
Old 09-27-2016, 08:53 PM   #19
Senior Member
slickest1's Avatar
Monaco Owners Club
Join Date: Jul 2011
Location: B.C.
Posts: 3,918
Originally Posted by deandec View Post
He likely has an "air throttle valve" behind the accelerator pedal as I do in the same vintage Country Coach.

It needs air pressure to respond although 90 psi should work for the throttle.
Ok thanks for the clarification. I have seen setups like that back in the 60's and 70's but didn't think they would be used in the 90's.

Dennis & Marcie & Captain Hook The Jack Russell,aka PUP, 1998 HR Imperial 40 ft RVM59
A good day on the road means a better night at the park!
slickest1 is offline   Reply With Quote

air brakes, brake, brakes

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
Air Brakes or Hydraulic Brakes? Stretch Alpine Coach Owner's Forum 35 03-28-2017 02:09 PM
DP Peak Chassis Disc Brakes vs. Air Brakes desertvince Alpine Coach Owner's Forum 15 11-07-2014 01:54 PM
Whata the diff air brakes/hyd on brakes on DP maxwell18 Roadmaster Motorhome Chassis Forum 1 07-30-2013 12:04 PM
Air brakes/spring brakes jillie Newmar Owner's Forum 19 08-15-2012 05:25 PM
tow brakes systems using coach air brakes clubmed98 Newmar Owner's Forum 11 03-01-2010 07:48 PM

» Virginia Campgrounds

Reviews provided by

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 11:07 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.