RV Trip Planning Discussions

Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Tiffin Owner's Forum
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 09-13-2015, 11:48 AM   #1
Senior Member
 
Join Date: Sep 2015
Location: Houston, TX
Posts: 160
Auto park brake. How does it work?

The wife and I recently purchased a 1994 Allegro Bus 34 footer on Oshkosh chassis with 5.9l and md3060 transmission.

I am now going through it to learn its systems and maintain/service everything to ensure a sound rig.

The rig has hydraulic brakes and a large yellow diamond shaped parking brake which I believe may be an auto park brake.

How does this brake work? What service, maintenance or adjustments must be made to make sure it is safe? We would hate for rig to roll way on us.

Thanks in advance for your information.
__________________

Fugitive861 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 09-13-2015, 12:08 PM   #2
Senior Member
 
Skip426's Avatar


 
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 18,186
Welcome to iRV2.

Can you look at your coaches drive shaft and see if there is a brake drum on the transmission end.
Is your coach equipped with air suspension ? The park brake assembly diagram I have is for an air pressure applied drum brake on the drive shaft; so would require an air compressor on the coach.
__________________

__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
Skip426 is online now   Reply With Quote
Old 09-14-2015, 08:27 AM   #3
Senior Member
 
Tiffin Owners Club
Winnebago Owners Club
Join Date: Feb 2012
Location: Las Cruces, NM
Posts: 3,544
If I remember this correctly, the Auto Park brake was used on Workhorse chassis and was a GMC product on their gas engine coaches. When you place the transmission in Park, the Parking Brake was automatically applied.

I don't believe your coach has one of these. The yellow diamond shaped button is, in fact, your emergency brake/park brake. When you stop, you need to put your transmission in neutral (unless it has a Park postiion) and apply the brake. If you have a Park position on your gear selector, your coach may apply the parking brake. The yellow button would be how you release the brake (just an educated guess).

My advice - call Tiffin Service and see if you can get one of the old timers. Also, take it to a parking lot and do some experimentation.
__________________
Roger & Mary
2017 Winnebago Navion 24V
2014 Tiffin Phaeton 36GH (Sold)
luvlabs is offline   Reply With Quote
Old 09-14-2015, 10:00 AM   #4
Senior Member
 
skypilot_1's Avatar
 
Tiffin Owners Club
Join Date: Oct 2011
Location: The Ozarks
Posts: 1,260
My GM gas glasser had the yellow button. The way it worked was an electric jack screw mounted on top of engine by firewall pulled a cable that applied the brake shoes on drive shaft parking brake drum.
I know this because when attempting to release parking brake it did not work. Had to pull the clevis pin that attached to the cable to get shoes to retract so could drive coach from RV park.
Almost couldn't get pin out, really high tension on jack screw. If you have to do this be very careful as the cable whips back.
Found out from dealer that this is a common problem with jack screw seizing up.
Your's may not be like this. But as you have no air system on coach the sw is electric.
__________________
Ret. Military/Corporate Pilot
Summers in the Ozarks-Winters in the Keys
We're always home-But we're always gone
skypilot_1 is offline   Reply With Quote
Old 09-14-2015, 10:09 AM   #5
Senior Member
 
edgray's Avatar


 
Join Date: Oct 2002
Location: Madison, MS
Posts: 8,418
Quote:
Originally Posted by Fugitive861 View Post
The wife and I recently purchased a 1994 Allegro Bus 34 footer on Oshkosh chassis with 5.9l and md3060 transmission.

I am now going through it to learn its systems and maintain/service everything to ensure a sound rig.

The rig has hydraulic brakes and a large yellow diamond shaped parking brake which I believe may be an auto park brake.

How does this brake work? What service, maintenance or adjustments must be made to make sure it is safe? We would hate for rig to roll way on us.

Thanks in advance for your information.
Since FCCC bought Oshkosh, I suggest you contact them with your vin # and see if they can give you a definitive answer.

IF you determine you have a spring-applied, hydraulic pressure release AAPB it MAY be similar to the J71 AAPB that GM/Workhorse used on the P32 chassis. If so, you can read lots of threads on the J71 in the Workhorse forum, and get info about parts and free advice too. Good luck.

IMO, it is vital to your safety that you learn more about exactly what you have that is designed to keep you parked, when you expect to be.
edgray 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
Auto Park Brake converted to Manual Lever the_dieter Workhorse and Chevrolet Chassis Motorhome Forum 183 07-27-2019 08:11 PM
Park Brake Light stays on ???? 2006 Exec bigjim8499 Monaco Owner's Forum 5 05-07-2015 08:19 PM
Park Brake comes and goes KenM Allison Transmission Forum 1 04-30-2015 04:13 PM
Park brake on a Dolphin chubber National RV Owner's Forum 3 08-26-2014 12:14 AM
88 Fleetwood Limited Parking Brake jmerritt Vintage RV's 1 05-29-2014 08:16 PM

» Featured Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 07:40 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.