Reply
 
Thread Tools Search this Thread Display Modes
 
Old 08-14-2012, 07:06 PM   #15
4 Rivet Member
 
SafariSS's Avatar
 
2005 30' Safari
Houston Texas , Texas
Join Date: Aug 2006
Posts: 475
I like the concept of disk brakes however everyone that I known that has had them has had a ton of problems and had a hard time in the middle of know where getting parts. Don't get me wrong I am sure they are awesome performing but I can buy alot of 39.00 backer plates for my old traditional electric brakes.
__________________

__________________
SafariSS is offline   Reply With Quote
Old 08-14-2012, 07:11 PM   #16
Rivet Master
 
1981 31' Excella II
New Market , Alabama
Join Date: Sep 2011
Posts: 5,648
The problem is I am going to have to replace all 4 backing plates and all 4 drums anyway so I might as well spend a little more money and get something that actually works. There is not much to go wrong other than the actuator and that can be replaced at any trailer, RV, or boat place. I can fix just about anything and I can live without brakes for a short period of time to get to where I can get parts. I have worked on drum brakes and disk brakes for about 40 yrs and I will pick disk if there is a choice for performance and maintainability. I think the weak link is the actuator. The other stuff is the same as on a car.

Maybe some of my problems will go away if I replace everything. Problems I am having now are brakes that stay on a little all the time causing overheating which leads to blown grease seals etc. Brakes that lock before others ruining tires. Uneven braking and flaky behavior in general.

Perry
__________________

__________________
perryg114 is offline   Reply With Quote
Old 08-14-2012, 07:24 PM   #17
4 Rivet Member
 
SafariSS's Avatar
 
2005 30' Safari
Houston Texas , Texas
Join Date: Aug 2006
Posts: 475
I know Rich Luhr (airstream life) and a guy I met at north Dallas RV (airstream service center), have had brake pads to come off the back plate which then scour the rotor to trash. The pads seem so small, like a small puck.

Like I say, love.the concept but it has to work good.
__________________
SafariSS is offline   Reply With Quote
Old 08-14-2012, 08:03 PM   #18
Well Preserved

 
1993 21' Sovereign
Colfax , North Carolina
Join Date: Jun 2003
Posts: 20,190
Perry, I've had to install spacer shims between the hub and wheel to get the wheel to not rub the caliper. Then I had to get different lug nuts so there would be enough threads to keep the lug nuts from coming off. The new aluminum wheels, and every factory steel wheel I've tried has worked. Just not the 1970's or so aluminum wheels.
__________________
Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.
Terry
overlander63 is offline   Reply With Quote
Old 08-14-2012, 09:01 PM   #19
Rivet Master
 
1981 31' Excella II
New Market , Alabama
Join Date: Sep 2011
Posts: 5,648
Well mine is an 81 trailer. I don't know if they changed the rims at all.

Perry
__________________
perryg114 is offline   Reply With Quote
Old 08-14-2012, 09:05 PM   #20
Rivet Master
 
1981 31' Excella II
New Market , Alabama
Join Date: Sep 2011
Posts: 5,648
Remember guys they use the same caliper for 10" and 12" disks. The same caliper with a 12" disk is going to be much more effective at stopping than a 10" disk. It is that whole lever arm thing. I will be using the 12" disk. The question is what was the diameter of the disk brake rotor on the Chevy?

Perry
__________________
perryg114 is offline   Reply With Quote
Old 08-14-2012, 09:08 PM   #21
Vintage Kin
 
slowmover's Avatar
 
Fort Worth , Texas
Join Date: Nov 2006
Posts: 7,583
Images: 1
10.2" That's how it fit a 14" wheel.
__________________
1990 35' Silver Streak Sterling; 9k GVWR.
2004 DODGE Cummins 305/555; 6-manual; 9k GVWR.
Hensley Arrow. 9-cpm solo, 15-cpm towing
Sold: Silver Streak Model 3411
slowmover is offline   Reply With Quote
Old 08-14-2012, 09:31 PM   #22
Rivet Master
 
wkerfoot's Avatar
 
1979 23' Safari
1954 29' Liner
Orange , California
Join Date: Feb 2005
Posts: 3,667
For what its worth, I recall that the Kodiak calipers are single piston floating calipers and the 12" Dexter calipers are double piston fixed pistons.

Bill
__________________
Bill Kerfoot, WBCCI/VAC/CAC/El Camino Real Unit #5223
Just my personal opinion
1973 Dodge W200 PowerWagon, 1977 Lincoln Continental, 2014 Dodge Durango
1979 23' Safari, and 1954 29' Double Door Liner Orange, CA

http://billbethsblog.blogspot.com/
wkerfoot is offline   Reply With Quote
Old 08-14-2012, 10:03 PM   #23
Rivet Master
 
TouringDan's Avatar

 
1966 24' Tradewind
1995 34' Excella
Lynchburg , Virginia
Join Date: Sep 2009
Posts: 2,470
Thanks for starting this thread Perry.

Not that it makes any difference, but does anybody know what calipers and actuator Airstream uses when they provide disc brakes as an option on new trailers?

Does anybody know of any test data on the braking performance of 12" drum brakes versus 12" disc brakes for an 8,000 lb Airstream Trailer (or SOB)?

Dan
__________________
TouringDan is offline   Reply With Quote
Old 08-14-2012, 10:29 PM   #24
Vintage Kin
 
slowmover's Avatar
 
Fort Worth , Texas
Join Date: Nov 2006
Posts: 7,583
Images: 1
Does anybody know of any test data on the braking performance of 12" drum brakes versus 12" disc brakes for an 8,000 lb Airstream Trailer (or SOB)?


I looked for and didn't find it. 2Airishuman probably had something stashed away. In "most" instances drums & discs won't be that different . . it is in repeated hard use (mountain descents) that discs pay for themselves in one day. Or, in wet weather over many miles. Etc.

Second is that the "best" brakes will stop the rig faster than the TV solo. To do this with drums takes quite a bit of work, and finesse to get it all correct. No voltage drop problems, no funky magnet problems, and perfect adjustment (on all wheels, equally). By comparison, a set of discs has no similar set-up problems.

Plus, the aftermarket now offers some high-zoot rotors and pad compounds for those willing to experiment. Best quality calipers have yet to be determined (if the interchange from OEM to trailer aftermarket is 1:1).

Using a decelerometer (60-0, repeatedly) will show the differences. But the test is those downgrades, wet surfaces, and equal braking force by all wheels.

Correct hitch rigging (per scale value formula) gets the most weight on the TT wheels, too. And a level trailer keeps one or two axles from "loading up" (tandem or tridem) that the rearmost loses traction in hard braking. TT tires also need to have good traction (design & condition) for brakes to have maximum effectiveness. (As TT tires should always be run at maximum sidewall pressure, this is moot as a discussion point).

The addition of TT anti-lock for disc brakes will be the icing on this cake where the TV is equipped the same way. The threads on DIRECLINK and TT Anti-lock have more info on that.

.
__________________
1990 35' Silver Streak Sterling; 9k GVWR.
2004 DODGE Cummins 305/555; 6-manual; 9k GVWR.
Hensley Arrow. 9-cpm solo, 15-cpm towing
Sold: Silver Streak Model 3411
slowmover is offline   Reply With Quote
Old 08-14-2012, 10:59 PM   #25
Rivet Master
 
TouringDan's Avatar

 
1966 24' Tradewind
1995 34' Excella
Lynchburg , Virginia
Join Date: Sep 2009
Posts: 2,470
In "most" instances, drums and discs won't be that different...

That makes sense in theory, but in reality I believe that discs will stop substantially quicker and with much less drama than drums because they are a much simpler design and "always adjusted properly since they need no adjusting". Anybody that has panic stopped a car with drum brakes versus a car with disc brakes knows that this is true.

I don't see why a TV with a trailer will stop faster than the TV alone. As long as you have enough braking force to skid the tires, the stopping distance depends on the coeficient of friction between the tires and the road surface and the ability to keep the tires from skidding (thanks to ABS). I don't have all the driving experience that you have towing loads, so you may be correct. I just don't understand how this is possible (if indeed it is).

Dan
__________________
TouringDan is offline   Reply With Quote
Old 08-14-2012, 11:35 PM   #26
Rivet Master
 
ROBERTSUNRUS's Avatar

 
2005 25' Safari
Salem , Oregon
Join Date: Mar 2006
Posts: 7,266
Images: 18
Blog Entries: 51
Hi, so if the disk brakes are so modern on trailers why do they use parts from an almost 30 year old Chevy. The drum brakes, for the most part, are very dependable; When they make a modern disk brake system for trailers that is as dependable as the ones on my old tow vehicle, I will think about them. With proper use of your brakes, not riding them three miles down the mountain, all brakes work better. DOWN SHIFT YOUR TRANS. My only complaint with trailer drum brakes is the fact that, unlike cars and trucks, they aren't balanced. [Thank You Centramatics]
__________________
Bob

2005 Safari 25-B
"Le Petit Chateau Argent"
[ Small Silver Castle ]
2000 Navigator / 2014 F-150 Eco-Boost / Equal-i-zer / P-3
YAMAHA 2400 / AIR #12144
ROBERTSUNRUS is offline   Reply With Quote
Old 08-15-2012, 07:36 AM   #27
Rivet Master
 
crispyboy's Avatar
 
1994 30' Excella
alexandria , Kentucky
Join Date: Aug 2004
Posts: 1,655
Images: 3
Go disks!!

Quote:
Originally Posted by SafariSS View Post
Don't get me wrong I am sure they are awesome performing but I can buy alot of 39.00 backer plates for my old traditional electric brakes.
Not to hijack the thread but prices have gone up on backing plates. Last week I found out that 3 of 4 grease seals went bad (replaced seals March 2012) and had to purchase new complete backing plates at a cost of $69 plus tax each. (trailer had new drums and backing plates in 2010 with limited mileage). Magnets and drums were severely grooved from continually turning up the controller. Found a machine shop that could reface the magnet portion of the drum ($75 for 3 drums). The trailer also has electric brake wiring issues that I haven't tracked down yet - not getting equal amperage to each wheel.

Sometime in the future I will go disk brakes and get rid of the electric brake HEADACHE! If you run a pivot point project hitch you know for certain when the brakes are adjusted equally and when they are not. Adjustment is not an issue with disk brakes. If I hadn't already had trip plans scheduled I would have made the change.

Where is the best place to mount the hydraulic actuator? Will it work inside of the toolbox on the tongue? Can it be subjected to the weather or does it need to be inside the coach?
__________________
Steve, Christy, Anna and Scout (Border Collie deceased 11-30-2016)
1994 Classic 30'11" Excella - rear twin
2009 Dodge 2500, 6 Speed Auto, CTD, Quad Cab, Short Bed
Hensley with adjustable stinger
WBCCI # 3072
crispyboy is offline   Reply With Quote
Old 08-15-2012, 08:06 AM   #28
Rivet Master
 
crispyboy's Avatar
 
1994 30' Excella
alexandria , Kentucky
Join Date: Aug 2004
Posts: 1,655
Images: 3
Quote:
Originally Posted by ROBERTSUNRUS View Post
Hi, so if the disk brakes are so modern on trailers why do they use parts from an almost 30 year old Chevy.
All disk brakes work essentially the same way. The improvements have come from the braking material, rotor design and size (vented, grooved) and single piston vs. dual piston. The only negative that I can think of against reliability can be different with the materials that make up the caliper. Some vehicles are subject to "lot rot" when they sit around and not used. Calipers or pistons can get sticky if they are not used on a regular basis. The Chevrolet parts mentioned should be a common item that could be obtained from an autoparts store out in the middle of nowhere.

The actuators seemed to be the most troublesome part and it sounds like they are getting better.
__________________

__________________
Steve, Christy, Anna and Scout (Border Collie deceased 11-30-2016)
1994 Classic 30'11" Excella - rear twin
2009 Dodge 2500, 6 Speed Auto, CTD, Quad Cab, Short Bed
Hensley with adjustable stinger
WBCCI # 3072
crispyboy 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



Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 03:31 PM.


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.