| Author | Message | ||
| thomas flocks (Taflocks)
Registered Member Username: Taflocks Post Number: 27 Registered: 9-2009 Posted From: 69.205.11.117 Rating: N/A |
every morning i fill my tanks with 100 lbs of air and by nightfall they are empty,any ideas? i know i have slight leaks in the left airbags #1 goes to 0 lbs and #2 goes to 40 lbs by nightfall. but i cant hear any leaks that would lose 100lbs of pressure. | ||
| macgyver (91flyer)
Registered Member Username: 91flyer Post Number: 496 Registered: 11-2004 Posted From: 74.193.175.110  Rating: N/A |
Do you purge your tanks after every run? I had a similar problem on my 4905 (the one that burned)... The rear tank (behind the engine, that you have to crawl under the bus to even SEE) was almost completely full of oil and water... Once it was purged and emptied of all the crud inside it, it held (and still holds) air for about a week in the air bags.. The tanks would drain dry in about 3 days, however. Sure beat the <24 hours to empty out though!  -Mac (Message edited by 91flyer on October 19, 2009) | ||
| Bob Baldwin (Bob4106)
Registered Member Username: Bob4106 Post Number: 182 Registered: 10-2004 Posted From: 24.74.180.20  Rating: N/A |
I found out that if I drain the muffler after the motor is off. My bus will hold air for a week or better. If I don't drain the muffler the air will be gone in a hour. | ||
| thomas flocks (Taflocks)
Registered Member Username: Taflocks Post Number: 28 Registered: 9-2009 Posted From: 69.205.11.117 Rating: N/A |
ok how/where do i find these tanks? i fill it with an air compressor as it ticks the neighbors off to run the bus outside their windows. | ||
| macgyver (91flyer)
Registered Member Username: 91flyer Post Number: 497 Registered: 11-2004 Posted From: 74.193.175.110 Rating: N/A |
o.O Drain the muffler??? wth? As for the tanks on your particular coach... I'm not familiar with the layout of your coach... Someone else will have to step up and answer that one.... I know my 4905, but don't know about a 4106. On mine, at least, there's a tank up under the back end with a twist type valve... Have to crawl up underneath to purge it... The other tank can be purged with valves behind the fuel door... But, again, I doubt your coach has the same layout, but maybe, who knows? -Mac | ||
| FAST FRED (Fast_fred)
Registered Member Username: Fast_fred Post Number: 989 Registered: 10-2006 Posted From: 75.60.109.64  Rating: N/A |
The leveling valves are the "usual suspects". One method that is not PC is to use the old freon in the bus air system (if there is any) and use a freon leak detector. These are REALLY sensitive and will find even the smallest leak. More PC would be one of the die substances from NAPA and a special lamp put into the air system. FF | ||
| macgyver (91flyer)
Registered Member Username: 91flyer Post Number: 499 Registered: 11-2004 Posted From: 74.193.175.110 Rating: N/A |
I'm still trying to figure out what "draining" a muffler has to do with anything... Or how would do such a thing. lol -Mac | ||
| Rob Norgren (Robsedona)
Registered Member Username: Robsedona Post Number: 159 Registered: 11-2007 Posted From: 75.211.189.255  Rating: N/A |
Mac Muffler also called a Ping tank is what you said you had to Crawl under to get at names LOL | ||
| Len Silva (Lsilva)
Registered Member Username: Lsilva Post Number: 297 Registered: 12-2000 Posted From: 72.187.35.208  Rating: N/A |
The compressor discharge muffler is the very first little tank after the compressor, also called the "ping tank"  | ||
| thomas flocks (Taflocks)
Registered Member Username: Taflocks Post Number: 29 Registered: 9-2009 Posted From: 69.205.11.117 Rating: N/A |
where would this be on the bus? | ||
| Bob Baldwin (Bob4106)
Registered Member Username: Bob4106 Post Number: 183 Registered: 10-2004 Posted From: 24.74.180.20 Rating: N/A |
Thanks Len, I guess I open a can of worms. | ||
| RJ Long (Rjlong)
Registered Member Username: Rjlong Post Number: 1628 Registered: 12-2000 Posted From: 67.182.53.218  Rating: N/A |
Thomas - Here's a pic of the "Air Compressor Discharge Muffler" (aka "Ping Tank"), on the 4106. It is located on the ceiling of the engine compartment inside the curbside transmission access door. The quick disconnect shown is for airing up the system from the rear w/o running the engine. Have a similar set-up on the front accessory tank under the driver.  Thomas - do you have the shop manuals for your bus? If not, you should pick up a copy and read it, as it will answer a LOT of your questions. Also, available from just about any truck stop, HD truck parts house or even NAPA, are lanyard-equipped quick-drain valves you can install on your air tanks. Since the 4106 did not come with an air dryer, draining your tanks on a routine basis is proper procedure. Daily, weekly or monthly, depending on the coach's usage and the humidity of the operating environment (humid = more frequent). FWIW & HTH. . . (Message edited by rjlong on October 20, 2009) | ||
| RJ Long (Rjlong)
Registered Member Username: Rjlong Post Number: 1629 Registered: 12-2000 Posted From: 67.182.53.218 Rating: N/A |
Thomas - As an answer to your original question, Fast Fred hit the nail on the head - the leveling valves are common suspension air leak sources. Safely block the bus up in the air (you don't want to be under it w/o doing so), and mix a sprayer bottle with a 50% solution of dishwashing liquid and water (adding some glycerin is optional). With the coach's air system filled, start spraying all the air line connections and components from back to front. The ones that bubble are where your leaks are. FWIW & HTH. . . | ||
| macgyver (91flyer)
Registered Member Username: 91flyer Post Number: 500 Registered: 11-2004 Posted From: 74.193.175.110 Rating: N/A |
Well, that makes more sense about the "muffler" thing. lol... But... This isn't what I was talking about on my 4905... Though, again, I'm only familiar with my own bus... On mine, there's a tank placed dead center just forward of the rear axle mounted up high. It's got a twist-type drain cock on the bottom of the tank itself. It took me a while to clean the crud off of it to even know there was a drain cock there... I don't think it had been drained in a couple of decades by the way it looked and the crud that spewed out of it.... But just draining my tanks resolved the problems I initially had with low air conditions... Before the fire, I drained the rear tank every couple of weeks because it was just such a pain to get to... I was going to install one of those self-purge valves before I started driving the coach consistently, but... She burned before I had the chance... So, I'll do that to the new bus (and make sure the bus is parked further from the house, in case of a repeat performance from Mr. Fire)... I drain the front tank every time the engine is run, even now... I still start and run the engine just to make sure the batteries are topped off and everything stays in working order... Well, what survived the fire, anyway... I still find it amazing that the electronics survived enough to allow the coach to start and run, much less still be able to actually move and drive the coach... Though, I certainly won't be taking it on any trips any time soon, except to the scrap yard once the shell is stripped... Sigh. But anyway, back on topic... Anyone have an idea of where I can get one of those self-purging valves? Or at least an idea of how to make the thing easily accessible without crawling under the axle to get to the thing??? -Mac | ||
| thomas flocks (Taflocks)
Registered Member Username: Taflocks Post Number: 31 Registered: 9-2009 Posted From: 69.205.11.117 Rating: N/A |
that is where i am filling her up. i will let the air out to see if there is any crud or water. i have also drained the one under the drivers seat. | ||
| ED Hackenbruch (Shadowman)
Registered Member Username: Shadowman Post Number: 177 Registered: 11-2003 Posted From: 70.193.173.212 Rating: N/A |
Mac, Napa, Haldex KN 21004 air tank lanyard valve. should be about 15 bucks each. | ||
| john w. roan (Chessie4905)
Registered Member Username: Chessie4905 Post Number: 1710 Registered: 10-2003 Posted From: 71.58.71.157  Rating: N/A |
If your 4905 has the shorter fuel tank (145), on the factory installed optional air dryers, they were installed in the space on the driver's side of fuel tank. There is about 18 inches of space there. Also, if you check, the main air line goes by there to the main air tanks above batteries on the opposite side. That line has a connector there that can be disconnected and plumbed into an air drier, like the factory did. If you have the 165 gallon tank, that space is taken up by the longer tank. Bendix also makes an automatic tank purger that dumps moisture when gov cycles. Attaches to bottom of tank at petcock outlet. Not too costly. http://www.bendixvrc.com/itemDisplay.asp?documentID=4738 | ||
| Nellie Wilson (Vivianellie)
Registered Member Username: Vivianellie Post Number: 363 Registered: 11-2008 Posted From: 75.178.92.43  Rating: N/A |
Lurking as usual. But why do they call it a 'ping' tank? Nellie Wilson | ||
| marvin pack (Gomer)
Registered Member Username: Gomer Post Number: 627 Registered: 3-2007 Posted From: 71.53.155.14  Rating: N/A |
A place where you PING? Gomer | ||
| Gus Causbie (Gusc)
Registered Member Username: Gusc Post Number: 1021 Registered: 11-2005 Posted From: 209.142.172.129  Rating: N/A |
Nellie, An air compressor naturally makes a high pitched "ping" as it runs. This muffler, although very small, is supposed to tone down this sound a bit. It also has a drain valve which I always forget about!! | ||
| Paul Lawry (Dreamscape)
Registered Member Username: Dreamscape Post Number: 592 Registered: 5-2007 Posted From: 64.40.216.36  Rating: N/A |
Us Eagles have them too, a true PITA to get to. I need to hook up a drain line so it's easier to do. As it's the initial collector, it could have all kinds of goodies in it. My manual calls it the "Pink" Tank, obviously a spell check error. Oh wait, before spell check, so a real human being missed it, go figure. LOL Of course it fits well with "Pinktober" month! (Message edited by dreamscape on October 22, 2009) | ||
| thomas flocks (Taflocks)
Registered Member Username: Taflocks Post Number: 34 Registered: 9-2009 Posted From: 69.205.11.117 Rating: N/A |
looks like most of /some of my leak is coming from the brake release button on the dash.i will check the fittings then replace if needed. | ||
| john w. roan (Chessie4905)
Registered Member Username: Chessie4905 Post Number: 1715 Registered: 10-2003 Posted From: 71.58.71.157 Rating: N/A |
I took the muffler off my air compressor. Almost like a Harley now. KA PING! KA PING! | ||
| Tim Brandt (Timb)
Registered Member Username: Timb Post Number: 438 Registered: 10-2003 Posted From: 66.165.176.62  Rating: N/A |
Mine has never had a muffler but I sure don't know how you would hear anythikng over the screaming Jimmy anyway |