Go Back   iRV2 Forums > iRV2.com COMMUNITY FORUMS > Vintage RV's
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
 
Thread Tools Search this Thread Display Modes
 
Old 10-18-2015, 10:38 AM   #1
Senior Member
 
IamJerryP's Avatar
 
Join Date: Feb 2014
Location: Kentucky
Posts: 433
89 Chieftain brake, and vacuum

89 chieftain 454 brake booster vacuum line attach point.

Is there a place to attach a vacuum line to the brake system?
I can't find the usual can in front of the brake fluid reservoir, nor any place for a vacuum line to go.
Also not finding any vacuum lines going to the brake system
__________________

__________________
Jerry P
89 Winnebago Chieftain M23RC
A work in progress
IamJerryP 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 10-18-2015, 11:15 AM   #2
Senior Member
 
BFlinn181's Avatar
 
Gulf Streamers Club
Join Date: Jan 2012
Location: Cincinnati
Posts: 16,216
You mention a 1989 chassis, with a 454. That points to a Chevy P30 chassis, which has a vacuum operated brake booster. The booster isn't a 'can' but an almost 11" in diameter rounded dome tank mounted between the firewall and the master cylinder. It has a large vacuum hose running from the intake manifold to the booster. Often any vacuum controlled devices are powered off a secondary line, it's not usually a good idea to branch off the brake booster vacuum line for safety reasons.
__________________

__________________

Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
BFlinn181 is online now   Reply With Quote
Old 10-18-2015, 11:24 AM   #3
Senior Member
 
IamJerryP's Avatar
 
Join Date: Feb 2014
Location: Kentucky
Posts: 433
Thanks for the quick reply, I will look for it.




Quote:
Originally Posted by BFlinn181 View Post
You mention a 1989 chassis, with a 454. That points to a Chevy P30 chassis, which has a vacuum operated brake booster. The booster isn't a 'can' but an almost 11" in diameter rounded dome tank mounted between the firewall and the master cylinder. It has a large vacuum hose running from the intake manifold to the booster. Often any vacuum controlled devices are powered off a secondary line, it's not usually a good idea to branch off the brake booster vacuum line for safety reasons.
__________________
Jerry P
89 Winnebago Chieftain M23RC
A work in progress
IamJerryP is offline   Reply With Quote
Old 10-18-2015, 05:52 PM   #4
Junior Member
 
ijds's Avatar
 
Join Date: Feb 2011
Location: Delaware, Ohio
Posts: 13
I have a 85 with a 454 on a P 30 chassis and it has a Hydro-Boost it utilizes hydraulic pressure supplied from the power steering pump. It does not use a vacuum booster. Maybe this is what you have.
__________________
Dave & Debbie
Delaware, Ohio
1985 PaceArrow
ijds is offline   Reply With Quote
Old 10-19-2015, 12:24 AM   #5
Senior Member
 
IamJerryP's Avatar
 
Join Date: Feb 2014
Location: Kentucky
Posts: 433
Yep, I found the hydraulic lines coming in from the power steering pump,
Thank You for responding.
__________________
Jerry P
89 Winnebago Chieftain M23RC
A work in progress
IamJerryP is offline   Reply With Quote
Old 10-27-2015, 01:08 PM   #6
Member
 
Join Date: Nov 2013
Posts: 41
Can I jump in and hijack the subject for a sec. What about a 1988 HR 35' 460 Ford gas brake booster? I had 3/4 or normal pedal last year but haven't been out except once this year and found I have brakes but the pedal goes way down. Stops ok but not enough pedal for me. Manual says something about a whirling sound when you turn the key on. I have heard it before but don't hear it now. Electric booster???????? Thanks for any help.
__________________
Fred from Ga is offline   Reply With Quote
Old 10-27-2015, 01:56 PM   #7
Senior Member
 
BFlinn181's Avatar
 
Gulf Streamers Club
Join Date: Jan 2012
Location: Cincinnati
Posts: 16,216
Quote:
Originally Posted by Fred from Ga View Post
Can I jump in and hijack the subject for a sec. What about a 1988 HR 35' 460 Ford gas brake booster? I had 3/4 or normal pedal last year but haven't been out except once this year and found I have brakes but the pedal goes way down. Stops ok but not enough pedal for me. Manual says something about a whirling sound when you turn the key on. I have heard it before but don't hear it now. Electric booster???????? Thanks for any help.
I'm not sure as to what type of Hydroboost system you have. Go figure, I thought you were talking about a vacuum assist system at first. Some HB use the power steering pump for the hydraulic power, storing some pressurized fluid in an accumulator to provide up to 3 braking efforts when engine stops. Other systems use an electric pump and reservoir for the hydraulic pressure. To test if your system is working, Try this:

"Basic function can be checked by pumping the brake pedal until hard with the engine off and then starting the engine while maintaining slight pedal pressure. Proper operation should result in the brake pedal sinking down and then pushing back up against your foot. The sinking of the pedal when the engine was started is a result of the power chamber being pressurized. Once the power steering system is at full pressure, it results in the pedal pushing back against your foot pressure."
__________________

Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
BFlinn181 is online now   Reply With Quote
Old 10-31-2015, 08:09 PM   #8
Senior Member
 
Dave78Chief's Avatar
 
Join Date: Jun 2009
Posts: 1,513
Chevy P30 Chassis
Every P30 chassis I have seen from 84 up either had a Hydroboost brake system with either JB8 (front disk/Rear Drum) or JF9 (Front/Rear Disk) configuration. I have not seen the JB7 (Front disk / Rear drum) with vacuum booster system on a motorhome chassis

87-90 John Deere RV1000 or RV1200 chassis with Ford 460CI engine
Uses a Hydro-Max system. Similar to a P30 Hydroboost except it uses the electric hydraulic pump vice the Power steering pump
http://www.cdr-roc.com/89JD/89-JD-Chassis-manual.pdf
__________________
Dave in Virginia
1978 Winnebago Chieftain
Dodge M400 - 440-3
Classic Winnebago Site: http://www.classicwinnebagos.com/forum/index.php
Dave78Chief is offline   Reply With Quote
Old 01-06-2016, 05:59 PM   #9
Member
 
Join Date: Nov 2013
Posts: 41
Dave78Chief you are correct. Thanks. Talked to a repair shop, auto and trucks, and he knew about the system. Said he had seen several over the years with this system and problem. Thinks it's the relay. Will soon find out, taking it to him for repair. Will post results. Again thanks to all of you for input.
__________________

__________________
Fred from Ga is offline   Reply With Quote
Reply

Tags
brake



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
Jeep vacuum booster problem, Brake Buddy Rvbuzz Toads and Motorhome Related Towing 17 10-05-2015 11:48 AM
U.S. Gear unified towed brake vs brake buddy with air actuator taipan Toads and Motorhome Related Towing 6 10-16-2014 05:26 AM
SMI brake system set up dateem Toads and Motorhome Related Towing 3 08-02-2014 12:07 AM
88 Fleetwood Limited Parking Brake jmerritt Vintage RV's 1 05-29-2014 09:16 PM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 02:47 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.