Wanderlodge Owners Group  
BuyByeBlueBird.com
Donate

Go Back   Wanderlodge Owners Group > Mechanic's Corner > FC (Forward Control Unique Issues)

FC (Forward Control Unique Issues) If you have a unique issue with your FC model coach and it can't be answered in one of the other forums here, then this is where you can list it.......List your FC Parts here too.

Site Search:
Reply
 
Thread Tools
  #1  
Old 08-05-2012
Strayhound Strayhound is offline
Senior Member
 
Join Date: Mar 2010
Location: Rimrock
Posts: 71
Default Air Brake Pressure Gauges/Maintenance

The dual gauges on the dash board are not filling up at the same rate and I've noticed that the compressor has to kick in after short stops.

The air line blew off the right gauge last winter, but I reinstalled it and has remained in place. However, there's now some oily residue around the air inline on the right gauge.

Any general advice on basic air brake maintenance for this old bird is appreciated.

Thanks!
__________________
John
1978 31 FC
Strayhound
Phoenix, AZ
Reply With Quote
  #2  
Old 08-06-2012
papadbh papadbh is offline
Senior Member
 
Join Date: Feb 2012
Location: Hudson
Posts: 157
Default

Good question John! I look forward to the answer...I will keep watching!
__________________
[/SIGPIC]Don and Kelli Holcomb
Hudson, Florida
"The Circle H Lodge"
Reply With Quote
  #3  
Old 08-06-2012
Bill Pape's Avatar
Bill Pape Bill Pape is offline
Administrator
 
Join Date: Jan 2008
Location: Commerce
Posts: 12,472
Default

Purge air from the air tanks and look for oil, oil in the air line is not good.
If oil is present in the air tanks, the dryer needs service and / or the compressor is failing,
with the short cycle again the compressor could be failing or there is a leak that should be loud enough to hear.

your 78 may not have an air dryer, all the more need to drain the air tanks often.
the gages should move about the same , or there may be an air brake leak.
__________________
Bill & Patty
1988 FC, Silver Edition
Commerce, Michigan
Reply With Quote
  #4  
Old 08-06-2012
Strayhound Strayhound is offline
Senior Member
 
Join Date: Mar 2010
Location: Rimrock
Posts: 71
Default oily water from two of three tanks

There's three tanks underneath.

The curbside tank did not have a shutoff valve but what appears to be a valve stem. I pushed on it and nothing came out. I turned the valve on the driver's side tank and it blew out a brown, oily goo and drained only for 15 seconds or so.

I then turned the valve on the rear tank and blew steady for a couple of minutes. It appeared clearer, but when I put my hand into the stream it soon was cover with an oily residue.

I embarrassed to say, I didn't know this was supposed to be done daily.

Analysis always welcome!

Thanks
__________________
John
1978 31 FC
Strayhound
Phoenix, AZ
Reply With Quote
  #5  
Old 08-06-2012
Bill Pape's Avatar
Bill Pape Bill Pape is offline
Administrator
 
Join Date: Jan 2008
Location: Commerce
Posts: 12,472
Default

All three tanks should have a valve on the bottom, if there is a plug be really carefull there is a lot of air pressure in the tank.
Try to air up the pressure and drain again until the air is clear of fluids.
If the tanks are full of fluids this could also explain the short cycling.
__________________
Bill & Patty
1988 FC, Silver Edition
Commerce, Michigan
Reply With Quote
  #6  
Old 08-06-2012
Strayhound Strayhound is offline
Senior Member
 
Join Date: Mar 2010
Location: Rimrock
Posts: 71
Default

Hi Bill, I refilled the tanks and this time the buzzer kicked off around 60 to 65, rather than going up to 90. I then turned off the vehicle. Air was coming out of the curbside tank through the stem valve mounted on the bottom of the tank. I then drained the other two tanks and they were much clearer. I'm doing a second round now. I don't see how to automatically drain the curbside tank. It seems to blow out on its own. Is that OK?
__________________
John
1978 31 FC
Strayhound
Phoenix, AZ
Reply With Quote
  #7  
Old 08-06-2012
mynavion mynavion is offline
Can't re-member
 
Join Date: Dec 2007
Location: Stockbridge
Posts: 2,404
Default

Quote:
Originally Posted by Strayhound View Post
Hi Bill, I refilled the tanks and this time the buzzer kicked off around 60 to 65, rather than going up to 90. I then turned off the vehicle. Air was coming out of the curbside tank through the stem valve mounted on the bottom of the tank. I then drained the other two tanks and they were much clearer. I'm doing a second round now. I don't see how to automatically drain the curbside tank. It seems to blow out on its own. Is that OK?
Sounds like spitter valve leaking on main tank. Do search on this site for rebuild kit info. Very easy to do.....
__________________

John Stiles
1980 33FC
"My Navion". SOLD
Stockbridge, GA
Reply With Quote
  #8  
Old 08-06-2012
Strayhound Strayhound is offline
Senior Member
 
Join Date: Mar 2010
Location: Rimrock
Posts: 71
Default spitter valve

Okay, that appears to be what's going on. After four rounds of filling and draining the air tanks, they are blowing much cleaner. I'll continue to do this four or five times a day for a couple of days. Sorry to say I hadn't done this in two years. Now for the spitter valve...thanks
__________________
John
1978 31 FC
Strayhound
Phoenix, AZ
Reply With Quote
  #9  
Old 08-06-2012
Bill Pape's Avatar
Bill Pape Bill Pape is offline
Administrator
 
Join Date: Jan 2008
Location: Commerce
Posts: 12,472
Default

Good job John,

Drain all air or use the brake pedal to deplete air pressure, work on the spitter valve, there should also be a schreader valve (standard tire air valve) on the tank to hook up a shop compressor this will clear the first tank. the spitter valve may need replaced.
__________________
Bill & Patty
1988 FC, Silver Edition
Commerce, Michigan
Reply With Quote
  #10  
Old 08-06-2012
Strayhound Strayhound is offline
Senior Member
 
Join Date: Mar 2010
Location: Rimrock
Posts: 71
Default spitter valve rebuild

Bill, thanks for you help. I'm not sure how the spitter valve should be functioning to determine if it needs to be replaced. It automatically purges after stopping the bus and it blows for about a minute. Sometimes there's a bit of goo stuff left on the road. Otherwise, that's it. It looks easy enough to remove. Once that's done, what's the process to rebuild, clean or is it better just to replace?
__________________
John
1978 31 FC
Strayhound
Phoenix, AZ
Reply With Quote
Reply

Bookmarks

Tags
1978, air, brakes, gauges

Thread Tools

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
on Dash - air pressure gauges - tag axle is low DW SD Tires, Wheels, Brakes, Steering and Suspensions 48 08-07-2015 09:00 PM
No Water Pressure / Water Inlet / Pressure Regulator / Sporlan Valve konehd General 70 11-18-2011 11:09 AM
Gauges Donn B Electrical 35 05-10-2011 02:13 PM
Not Enough Gauges rrueckwald General 6 03-08-2011 09:41 PM
gauges Stephen Parts and Other Items For Sale 2 02-02-2010 09:52 PM

Web Search:

All times are GMT -4. The time now is 01:39 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.