Normal air bag bleeding?

luvrbus · December 07, 2018, 07:05:58 AM

This guy has a unique bus all 3 axles bleeding off level and the bus airs up

Dave5Cs · December 07, 2018, 08:50:38 AM

Yep thats why it maybe at the check valve before the accessory tank off the airdryer or bag filter. Happened to us.

ours are independent now and stay up until I want them not to be, LOL
In the old days when we had leveling valves it would bleed down in 2 hours.

luvrbus · December 07, 2018, 10:14:07 AM

You will never know with the air schematics for his unit if it was holding air till he had the air bag replaced it has to be the install I would think,with the air beams out of play they do drop faster with a small leak

Branderson · December 07, 2018, 11:09:22 AM

Luver, I wasn't holding air that long before bag replacements but I think it would take a good 4-5 hours before the axles rested on my wooden blocks. Now it's airing down within an hour.

I'm going tomorrow to the mechanic and having him look at it. I will let you guys know what comes from it. I appreciate all the responses.

I never knew that the "norm" was these busses can hold their air for days/weeks before. Even when my uncle had this bus it would air down when shutting off fairly quick. Guess he never cared that much to see where it was coming from. He did tell me today that it use to air down uneven but I never experienced that except that it seemed the front would take a little longer than the back but I only knew that b/c of the space between axle and block. I couldn't tell by looking at the coach.

So he's the one we are visiting for xmas in Texas and he recently bought a leak detector so maybe we will check that out in between sips of bourbon?

Dave5Cs · December 07, 2018, 08:07:50 PM

If it was the Job then maybe he tightens them up and it stops the leaks. If not refer to previous post.

chessie4905 · December 08, 2018, 04:11:05 AM

Did they have this "feature" on models with handicapped models? Or just kneeling?

buswarrior · December 08, 2018, 04:55:42 AM

How a coach lowers to assist customers to board depends on its vintage and manufacturer.

Popularly, in a high floor coach, the front suspension lowers, so the step-up height is less.

Many different vintages of valving since this started in the mid 80's, earlier and more so in transits. Slow, fast, reliable and less so...

The low floor bus world, some are lowering the whole curb side of the bus, so it tilts to the right in North America, front and rear suspensions involved.

Happy coaching!
Buswarrior

luvrbus · December 08, 2018, 05:23:24 AM

It's the shop problem anyways we cannot fix it here ,it's not clear if just the auxiliary tank is draining or the complete system, a bus with a tag dropping level is something rare

Dave5Cs · December 08, 2018, 12:06:10 PM

Maybe there is Delo 100 in his airbags?

Branderson · December 11, 2018, 09:35:35 AM

Turns out there is about a 3-4 inch area air is leaking out on the front right air bag which I assume is where the metal cap and bag meet. That's the hope anyway and that it's not a bad air bag.

He was only able to look at it briefly but I should know more this week.

Oonrahnjay · December 11, 2018, 10:27:08 AM

Quote from: Branderson on December 11, 2018, 09:35:35 AMTurns out there is about a 3-4 inch area air is leaking out on the front right air bag which I assume is where the metal cap and bag meet. ...

Hey, Brad. I'm pretty sure you're describing what the call the "seat". On many bags, there is a radiused cup in the metal plate that the matching edge of the rubberized bag is meant to seat down into. Sometimes, they come unseated because the metal is bent or the rubber part is torn or worn (in which cast the unit is done) but other times, the rubber just needs to be seated back on the metal. If you have someone who knows what he's doing, he'll be able to sort the difference out quickly.

Branderson · December 15, 2018, 01:37:14 PM

just wanted to follow up. I picked up the bus today. There was a small leak coming from the front right air bag. The metal plate was a bit corroded and had a very small crack in it so the mechanic fabricated another plate and so far so good. I just got it home and it's been an hr and it hasn't lowered at all and I can't hear the air coming out anymore.

I'm sure it will bleed out in a few hrs or so unless it is better now than it was before I got the air bags replaced.

Dave5Cs · December 15, 2018, 08:32:25 PM

Cool a followup. That doesn't happen very much thank you for letting us know.

Oonrahnjay · December 16, 2018, 07:41:01 PM

Quote from: Branderson on December 15, 2018, 01:37:14 PM... it's been an hr and it hasn't lowered at all and I can't hear the air coming out anymore. ...