|
04-09-2010, 08:11 PM
|
#1
|
Senior Member
Winnebago Owners Club
Join Date: Oct 2009
Posts: 1,170
|
Brakes squeal
Our, new to us, MH only has 7,000 miles on it and the brakes squeal loudly when coming to a stop. Someone told me that I should check out "burnishing" and that might help. They didn't know how to do it though. What the heck is burnishing? I can't find any info on it. Please help, Joe
__________________
2008 Itasca Latitude 39W. Cummins ISB 6.7 Turbo 340HP. Allison 6 Speed. Freightliner XCS. Michelin XRV 255/80R 22.5 LRG. SuperSteer MCU. Safe-T-Plus.
|
|
|
|
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!
|
04-09-2010, 08:43 PM
|
#2
|
Member
Winnebago Owners Club
Join Date: Jul 2009
Posts: 55
|
Drive slow and touch your breaks lightly to burnish the rust and dirt off the rotors
|
|
|
04-09-2010, 08:48 PM
|
#3
|
Moderator Emeritus
Nor'easters Club Workhorse Chassis Owner iRV2 No Limits Club
Join Date: Oct 2004
Posts: 30,785
|
When I have not driving the coach for a while my brakes will squeal until I have put a few miles on coach. The disks will rust up from moisture but driving it wears off rust and shines them up and less squealing.
|
|
|
04-09-2010, 08:50 PM
|
#4
|
Senior Member
Tiffin Owners Club
Join Date: Jun 2006
Location: Southern California
Posts: 1,808
|
azloafer, try this link. My brakes did the same thing when my motorhome was new. After going thru the burnishing procedure they now work fine.
Sammie
RV Tech Library - Burnishing Squeeling Brakes
__________________
2015 Tiffin Bus 37AP
2022 Jeep Grand Cherokee
"A Job Begun is Half Done"
|
|
|
04-09-2010, 09:56 PM
|
#5
|
Senior Member
National RV Owners Club Freightliner Owners Club
Join Date: Oct 2009
Posts: 1,875
|
When we picked up our Tradewinds last Dec in Florida, the first few mornings the brakes would squeel like crazy. I tried to get out of the RV parks as quickly as I could.
__________________
2001 National Tradewinds 7370 300 Cat
2011 Jeep Wrangler Unlimited Sport
Officially fulltiming. The Journey Begins
|
|
|
04-10-2010, 04:40 AM
|
#6
|
Senior Member
Newmar Owners Club Texas Boomers Club Freightliner Owners Club
Join Date: Jul 2008
Location: Don't mess with Texas
Posts: 3,118
|
I did the burnishing when I first got the mh. The brakes still squeal the first two or three times after sitting for two or three days.
__________________
Jim with Judy
2017 Newmar Ventana 4369, 2005 Jeep Wrangler (Rock Crawler), 2016 Jeep Wrangler (Mall Crawler)
|
|
|
04-10-2010, 06:25 AM
|
#7
|
Senior Member
Monaco Owners Club Texas Boomers Club
Join Date: Jan 2009
Posts: 2,529
|
Joe,
Assume you have air brakes with drums? Were the wheels/drums removed for inspection for purchase or bearing packing? If so there is a good chance that "brake dust" moved around and some ended up on the drum or shoes resulting in terrible squeel/grinding noise. This happened at our last maintainance so we went around the block and back to the mechanic. He blew out some of the dust with air which helped some. 20 miles home it got no worse but no better. Since brakes are subject to road water we figured it wouldn't hurt so "washed out" the drums with a garden hose. 2,000 miles since and not a squeek!
PS - We "searched" this site (iRV2) and found several discussions on squeels and burnishing......
__________________
Hal & Ginny Miller '04 Beaver Santiam PRT40
'04 Saturn Vue - US Gear Brake - Blue Ox tow
3"girls" (2 Irish Setters - 1 Retriever) - RIP Annie & Emily (12/26/2017)
|
|
|
04-11-2010, 01:25 AM
|
#8
|
Senior Member
Winnebago Owners Club
Join Date: Oct 2009
Posts: 1,170
|
I'm going to try hosing them out before our next trip. If that doesn't work I'll try to find a place to do the burnishing, although I'm at a loss as to what road I can use to go 60 mph and quickly brake to 40 mph and do it ten times! Joe
__________________
2008 Itasca Latitude 39W. Cummins ISB 6.7 Turbo 340HP. Allison 6 Speed. Freightliner XCS. Michelin XRV 255/80R 22.5 LRG. SuperSteer MCU. Safe-T-Plus.
|
|
|
04-11-2010, 10:25 AM
|
#9
|
Senior Member
National RV Owners Club Freightliner Owners Club
Join Date: Oct 2009
Posts: 1,875
|
Quote:
Originally Posted by azloafer
I'm going to try hosing them out before our next trip. If that doesn't work I'll try to find a place to do the burnishing, although I'm at a loss as to what road I can use to go 60 mph and quickly brake to 40 mph and do it ten times! Joe
|
Just come to Las Vegas and drive on the freeways. That's how the traffic drives normally here.
__________________
2001 National Tradewinds 7370 300 Cat
2011 Jeep Wrangler Unlimited Sport
Officially fulltiming. The Journey Begins
|
|
|
04-12-2010, 08:51 AM
|
#10
|
Senior Member
Join Date: Oct 2003
Location: Fulltime- On the Road
Posts: 383
|
Azloafer, like Hal, given the chassis, engine, and tires mentioned in your sig I also assume you have air brakes and very large drums. Drum based Air brakes systems are massive as compared to discs and they are made to be used with moderate to hard braking. Watch the semi-truck drivers as they come down a hill, or come to a stop. They don't apply light pressure, or ride the brakes. They brake hard and release, brake hard, and release. THere's a reason for this.
The most likley cause of squealiing air brake systems is the frequent application of light brake pressure and/or excessive usage of the pac brake during normal in-town, or in-city braking which also results in little, or light application of the air brakes. Light braking pressure will result in random, non-uniform, hot spots on the drum and this results in squealing. These hot spots (shinny areas as compared to the remainder of the drum surface) are typically in small areas on the drum surface and as these spots rotate over the brake pads they cause the squeal.
Air brakes should be frequently used with moderate to hard braking pressure. Hard braking causes the entire drum surface to heat up uniformily and this results in the entire drum surface being continuous with no random shinny areas and thus no squeal.
Squeally brakes usually can be eliminated by applying the brakes very hard several times. I mean very hard....five or six times in a row. Apply hard enough to the point where loose items in the rig, such as an item on a table surface, will slide forward while braking. This is best done when decellerating on an off-ramp, or when coming down a small hill.
Squealling also frequently occurs after the vehicle has sat just a few days in any area that has moderate humidity. Rust will rapidly accumulate on the smooth, shinny, drum surface and the rust builds up more and faster on any existing, more shinny, hot spot areas. Hard braking will usually remove this rust and will reduce or eliminate any shinny surfaces caused by hot spots.
Bottom line, if at all possible, avoid very light braking. Use more frequent moderate to hard braking.
__________________
Roadking
2006 Country Coach Inspire. 51946
|
|
|
04-12-2010, 06:57 PM
|
#11
|
RV Mutant #14
Winnebago Owners Club Texas Boomers Club Freightliner Owners Club iRV2 No Limits Club
Join Date: Aug 2008
Location: Texas
Posts: 17,189
|
I had that same problem when I first purchased my MH. I turned off the exhaust brake when doing some low speed in-town driving and it seemed to clear up my problem. Believe me, I don't like turning off the exhaust brake, but every once in a while now I will do it. On very humid days, or if it is sitting and there was a hard rain, I will notice the squealing when first taking off, but typically now, in the first couple of minutes it will go away.
Good luck.
__________________
Wayne MSGT USMC (Ret) & Earlene (CinCHouse) RVM14 (ARS: KE5QG)
Lexi - Goldendoodle
2015 Winnebago Tour 42QD - 2020 Lincoln Nautilus Reserve
It is what it is, and then it is what you make of it.
|
|
|
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
|
|
Thread Tools |
Search this Thread |
|
|
Display Modes |
Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
» Recent Discussions |
|
|
|
|
|
|
|
|
|
|
|
|
|