Reply
 
Thread Tools Search this Thread Display Modes
 
Old 05-02-2015, 10:27 AM   #1
Rivet Master
 
mayco's Avatar

 
1982 31' Airstream 310
champaign , Illinois
Join Date: Jun 2013
Posts: 2,760
P30 split diagonal brake system?

Can someone tell me if the p30 utilizes a split diagonal brake system?
__________________

__________________
mayco is offline   Reply With Quote
Old 05-02-2015, 12:30 PM   #2
Rivet Master
 
mayco's Avatar

 
1982 31' Airstream 310
champaign , Illinois
Join Date: Jun 2013
Posts: 2,760
I had a small leak in the right front at the caliper. It turned out to be just a loose fitting where the flex line attaches. Figured I ought to bleed the front lines, well then I saw the nipples on the bleeder screws were too short to attach a hose so I went and replaced both bleeders. When I went to bleed the two front calipers I had a heck of a time getting any pedal back. Well then I thought I might need to bleed the rear also and was wondering if right front was tied to left rear and so on. Split diagonal. I as trying to bleed them by myself which gets pretty frustrating. Finally got the wife to come out and run the pedal with me underneath and got em done. But boy, it took a good while to get the pedal to firm up. Another one of those "what have I got myself into" Airstream moments.

Mike
__________________

__________________
mayco is offline   Reply With Quote
Old 05-04-2015, 05:44 AM   #3
3 Rivet Member

 
1986 34.5' Airstream 345
Alliance , Ohio
Join Date: Apr 2007
Posts: 176
If I remember correctly the brakes are paired front and rear not diagonally. I used a pressure bleeder on mine and it took quite a bit of bleeding on the rear system. Hopefully your marriage survived the bleeding project.
__________________
mehes is offline   Reply With Quote
Old 05-04-2015, 06:36 AM   #4
Rivet Master
 
mayco's Avatar

 
1982 31' Airstream 310
champaign , Illinois
Join Date: Jun 2013
Posts: 2,760
Hehehe, shes a trooper she is. Thank you for the response. After getting the front bled it seemed to me that indeed the front two were paired and the back two paired. I did find something very interesting in researching the brake design though. Ive replaced the pads, calipers, master cylinder, flushed the brake fluid and the power steering fluid, and though the brakes will stop the rig I still dont like the amount of travel in the pedal before it seems to engage. So I started looking for info on the linkage and if there is any adjustment for the pedal travel. I found out that on the years prior to the auto-brake, the vertical rod connecting the pedal to the push rod into the hydro boost has several inches of thread on the bottom. There is a through bolt and cotter pin connection that when removed, you can adjust the amount of travel in the pedal before it engages. WOOOOOHOOOO! Just what I was looking for. So today or tomorrow Im going to make some adjustment to that rod and see what I can do. Sounds promising. Of course Ill need to be careful not to adjust it so much that the pads are draging.

Mike
__________________
mayco is offline   Reply With Quote
Old 05-04-2015, 02:24 PM   #5
Rivet Master
 
mayco's Avatar

 
1982 31' Airstream 310
champaign , Illinois
Join Date: Jun 2013
Posts: 2,760
I disconnected the connecting rod and threaded it in 3.5 full turns. Four turns it began to drag just a bit. Put it back together and was pleased with the results. Brakes engage higher on the pedal stroke as anticipated. Well worth the effort. I should have saved the link describing the linkage because now I cant find it. Oh well, its very straight forward when you look at the connecting rod from the pedal. I had no idea that the linkage was adjustable, very cool. I hadnt seen it mentioned on any of the brake threads. I think the linkage changed when the auto-park was introduced.

Mike
__________________
mayco is offline   Reply With Quote
Old 05-06-2015, 05:27 AM   #6
3 Rivet Member

 
1986 34.5' Airstream 345
Alliance , Ohio
Join Date: Apr 2007
Posts: 176
Good info on the pedal adjustment. Next time I'm under the rig I'm going to take a look for future reference.
__________________
mehes is offline   Reply With Quote
Old 05-06-2015, 09:25 AM   #7
Rivet Master
 
mayco's Avatar

 
1982 31' Airstream 310
champaign , Illinois
Join Date: Jun 2013
Posts: 2,760
Took the rig out for a good test run on the brakes this morning and WOW what a difference in the pedal and stopping response. Ive taken the rig to two different mechanics for brake work, master cylinder, flush, new pads. It all needed done but I still didnt like the feel of the pedal, too much stroke before the brakes engaged and would need to pump once to get a firm pedal. Both mechanics went for a test drive with me after the work was done and both told me that it was just the nature of the brakes on the p30. Both shops are very reputable in my community. So I thought "what it is is what it is". When doing the research to find out if the p30 was a split diagonal system, in order to understand the bleeding process, I ran across a very brief mention of the adjustment that dan be made on the connecting rod to the pivot attached to the plunger. Very brief and only saw it mentioned on two web sites which I promptly lost instead of saving, DOH! Oh well.

Anyway, took it out this morning after adjusting that rod and man oh man oh man what a difference in the brakes. I am so pleased. I did not have confidence in the brake system before no matter what the mechanics said. 100% improvement in pedal feel, brakes engage much higher in the stroke, and my confidence in the brakes is no longer a concern. The adjustment is simple and basically just reduces the travel in the stroke before the plunger into the hydroboost starts to activate the brakes. Very straight forward when you look at it.

Some PB BLASTER on the threads of the rod and a small wire brush to clean up the threads to break it loose. I raised one wheel off the ground so
I could spin it while making the adjustment, that way I could be sure I didnt go too far and create drag on the rotor. Simple, all it cost was some time and made such an incredible difference in the brakes. YEEEEEEEEEEEHAWWWWWWWW!!

Mike
__________________
mayco is offline   Reply With Quote
Old 05-06-2015, 10:22 AM   #8
Keen amature
 
martin300662's Avatar

 
1975 20' Argosy 20
Chestfield , Kent
Join Date: Mar 2014
Posts: 2,107
Sorry it is a little late but the is a good write up on the hydroboost brakes on the Classic Winnebago forum (Hydroboost Braking System), including info on adjusting the rod.

Hopefully a little useful, even if too late.
__________________
martin300662 is online now   Reply With Quote
Old 05-06-2015, 10:30 AM   #9
Rivet Master
 
mayco's Avatar

 
1982 31' Airstream 310
champaign , Illinois
Join Date: Jun 2013
Posts: 2,760
Thats great Martin, Ill check it out. Never too late! With all the concerns and threads about the p30 braking system the more info the better is the way I see it. I would have never thought to look on a Winnie site even though it obviously makes perfect sense.
__________________
mayco is offline   Reply With Quote
Old 05-06-2015, 12:05 PM   #10
Rivet Master
 
1982 28' Airstream 280
Redwood City , California
Join Date: Mar 2008
Posts: 1,735
Hey guys, thanks for the info. My brakes work great after one pedal pump. I'm going to try adjusting the rod to see if that one pedal pump goes away!


Sent from my iPad using Airstream Forums
__________________

__________________
http://projectupdraft.com/airstream

"We are free to go where we wish and to be what we are"
Richard Bach, Jonathan Livingston Seagall
dadstoy is offline   Reply With Quote
Reply


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
'98 P30 soft Brake Pedal Big Denny Land Yacht/Legacy Motorhomes 3 06-25-2014 08:28 AM
Brake Job on P30? 92landyacht Mechanics Corner - Engines, Transmission & More... 8 04-24-2014 05:43 PM
Split System Heat Pump perryg114 Furnaces, Heaters, Fireplaces & Air Conditioning 6 12-02-2013 08:50 PM
Anyone using a split AC system? mspeas Furnaces, Heaters, Fireplaces & Air Conditioning 5 06-21-2010 11:53 AM
Split System A/C advice needed 65CV Furnaces, Heaters, Fireplaces & Air Conditioning 2 10-10-2007 05:11 PM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 09:08 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.