Parts Catalog Accessories Catalog Tech Info Tech Forums
  Search our site:    
 Cart  | Project List | Order Status | Help    

Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 08-06-2003, 06:43 PM
Registered User
Join Date: Sep 2002
Location: Kingsport, TN
Posts: 375
Humming/high pitched noise, stops when brakes applied

Hi everybody,

After reading john420’s story about humming noise, which probably came from a stuck emergency brake, I thought I share my experience with a humming/pitched noise. It might alarm you to the brakes and might prevent more damage.

It happened on our motorhome, which has a Ford E 350 chassis. I pull a motorcycle trailer behind; the trailer has electric brakes.

Coming off the highway and entering a State Park, I hear a pitched noise that stops when I apply the brakes. As I had the brakes on the MH adjusted and fluid changed in July 2002, but not repacked the trailer bearings as recommended by the manufacturer (every 2 years and I was in year 3), I assumed the trailer bearings were the culprit.
Went to the next Goodyear/Gemini dealer the next morning and had the trailer bearings adjusted. They were definitely loose, but mechanic advised that my kind of noise is more likely from brakes rather than bearings. Trailer brakes looked ok.
Not following through on that thought, after all, I had the brakes done last summer, I went back on the highway. MH brakes seemed fine too me. This was probably around 11:00 am. By 5:00 pm in heavy traffic, MH behaves as if a tire is going flat. I pull to the right and check all tires. All are ok. Get back in traffic, but MH pulls to the left. Stop again and now smell overheating brakes when coming out of MH. Left front hubcab is too hot to touch.
Yes, you guessed it by now, a stuck front left caliper.

Towing $175 to next Ford dealer, which is of course closed by now. 2 nights in hotel, as an ABS wire, which has cracked insulation, is not in stock. 2 rebuilt calipers, 2 rotors machined and new brake pads.

May be, if I had stopped at the next Ford dealer in the morning, they might have found what was wrong with the brakes and I might have saved the towing and the 2 nights in a hotel. We will never know, but if I hear any kind of chaffing/ high pitched noise again, that stops when you apply the brakes, my first thought will be “brakes”!!!

Reinhard Kreutzer
Reply With Quote


Thread Tools
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 On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 10:27 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page