RV Trip Planning Discussions

Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
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 05-21-2018, 08:08 PM   #1
Junior Member
 
TenMillie's Avatar
 
Winnebago Owners Club
Join Date: Jul 2017
Posts: 18
Buzzing from front of coach

2004 Winnebago Vectra 40kd.
Only when engine is running there is a buzzing coming from front. Can be heard best while standing in front of coach. Appears to be coming from the item in the (hopefully attached) picture.
We are on the road, currently in Santa Fe. Everything seems fine. Air is good, hydraulics seem fine.Click image for larger version

Name:	IMG_20180521_195324350.jpeg
Views:	30
Size:	86.5 KB
ID:	203738
__________________

TenMillie 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 05-21-2018, 10:37 PM   #2
Senior Member
 
Skip426's Avatar


 
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 16,347
This picture is your air brake control valve and I'm sure if it's buzzing you have some kind of a leak in the system , probably internal in the valve its self.
When your foot isn't on the brake the valve should be holding all the pressure applied to it.
If your coach is equipped with adjustable pedals , try moving them towards the drivers seat slightly to see if there is any change.
If the pedals aren't adjustable have someone pull up on the brake pedal while you listen for change in sound , the pedal may not be fully returning and holding slight pressure on the valve causing a leak , not enough to apply the brakes just enough to make the noise.
__________________

__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
Skip426 is offline   Reply With Quote
Old 05-21-2018, 10:37 PM   #3
Senior Member
 
Lv2Roam2's Avatar


 
Winnebago Owners Club
Freightliner Owners Club
Join Date: Jun 2014
Location: Somewhere On the Road
Posts: 697
Looks like the air manifold. Can you put some soapy water on it and see if you get any bubbles? May have a leak...
__________________
Steve
2015 Itasca Ellipse QD | 2014 Jeep Grand Cherokee
Lv2Roam2 is offline   Reply With Quote
Old 05-21-2018, 11:03 PM   #4
Senior Member
 
BRex45's Avatar
 
Join Date: Jul 2011
Posts: 563
Skip426 is correct. Years ago that was called an E6 treadle valve or brake valve, the MOST critical valve in the brake system. I never heard one hum but have heard them leak slightly from the exhaust port. The wires in the pic are attached to the brake light switch.

NOT a manifold. The brake systems of our rigs are so critical I would suggest not posting anything unless a person is absolutely sure.

Shocks, lights, charging systems, not so much.
__________________
BRex

'97 Country Coach Intrigue
BRex45 is online now   Reply With Quote
Old 05-22-2018, 12:38 AM   #5
Senior Member
 
Join Date: Sep 2004
Location: Olympic Peninsula
Posts: 201
Quote:
Originally Posted by TenMillie View Post
2004 Winnebago Vectra 40kd.
Only when engine is running there is a buzzing coming from front. Can be heard best while standing in front of coach. Appears to be coming from the item in the (hopefully attached) picture.
We are on the road, currently in Santa Fe. Everything seems fine. Air is good, hydraulics seem fine.Attachment 203738
From your description I’d be looking at the vacuum pump as the possible source.
__________________
I'm Jammin
02 Itasca Horizon 36LD, Cat 3126E, Allison MD3000MH
09 Colorado Z71 Ex Cab, SMI AF1, Demco Stuff
JaminSamin is offline   Reply With Quote
Old 05-22-2018, 06:46 AM   #6
Junior Member
 
TenMillie's Avatar
 
Winnebago Owners Club
Join Date: Jul 2017
Posts: 18
Thanks!! Had no idea what that was but am still not sure if that is where the buzzing is coming from. I can't start the engine until Thursday when we are leaving due to park rules. If we can determine for sure the valve is the culprit then we will have it checked. Thanks again. This forum always comes through.
__________________

TenMillie 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
Onan 7500 buzzing sound in front 53block RV Systems & Appliances 6 02-10-2014 06:29 AM
"Buzzing" noise front of UFO UFO Pilot Workhorse and Chevrolet Chassis Motorhome Forum 5 07-13-2011 08:15 PM
"Buzzing" noise front of Winnebago UFO UFO Pilot Winnebago Industries Owner's Forum 7 07-13-2011 03:24 PM
Buzzing noise front AC Unit Mel B Fleetwood Products Owner's Forum 1 10-21-2007 02:07 PM
buzzing rattling noise when accelerating... David Elwarner MH-General Discussions & Problems 5 05-24-2007 01:02 PM

» Featured Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 04:45 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.