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 61 
 on: October 23, 2014, 05:51:15 PM 
Started by bevans6 - Last post by krank
Article in our local paper today about a tour bus that almost had a brake fire.  A trucker following the bus noticed smoke coming from the left drive wheel, pulled out to pass the bus and the drum was glowing red, got the bus pulled over and put a couple of fire extinguishers into the left drive brake while the driver got the passengers out.  What probably happened is the spring brake on that side activated or started to activate while the bus was driving, and the engine torque was enough to keep the wheel rolling.  Kind of interesting, I would suspect a leaking diaphragm.  I know spring brakes can lock a set of duals on an unloaded trailer, and maybe on a loaded trailer, so road friction isn't enough to keep the wheels spinning, but I wonder if the torque and power of a modern engine can overcome a spring brake?

Oh, and a following tractor trailer rear ended a pickup truck that stopped behind the whole mess...  No one was hurt and the bus didn't burn down.

Brian


This technically would not be a spring brake failure but rather an air system failure. If it were a spring brake failure it would have a reduced stopping force when applied?

 62 
 on: October 23, 2014, 05:26:11 PM 
Started by sparkplug188 - Last post by Dave5Cs
Built a lumber rack once on my truck and did the same thing.
And all you young guys  don't drink a lot of beer with a friend and decide you can have a shooting competition  in the garage with the targets being black widows on the back side of the wooden garage door with a pellet gun. Just saying in case you think of it!....... Shocked Roll Eyes

 63 
 on: October 23, 2014, 04:52:36 PM 
Started by krcevs - Last post by Dave5Cs
I just pulled out our 23 gallon tank put in 2 slide that hold two tanks each and put in 4 20 lb tanks. I change them when I need to and don't have to move the bus.

 64 
 on: October 23, 2014, 04:48:07 PM 
Started by sparkplug188 - Last post by HB of CJ
Seems laminated safety glass does not like ANY measurable concentrated heat or applied pressure.  Also specifically do not try to kill pesky wasps by cutting them in two with your trusty K-bar utility knife after they have stung you three time and you want revenge and that aforementioned pesky wasp is resting on laminated safety glass. 

Poor judgment.  Do not ask.  Same thing with ANY measurable concentrated high heat, (any source) heating up laminated safety glass, like Bus Conversion side windows.  Again, poor judgment.  Again, do not ask.  Embarrassing.  HB of CJ  (embarrassed old coot) Smiley  Ah well.  Maybe it is a strength of materials thing?  Dunno fur sures.

 65 
 on: October 23, 2014, 04:08:11 PM 
Started by bevans6 - Last post by krcevs
We have very few what you would call professional bus drivers up here.  Mostly they seem to be semi truck drivers who got too old to run the long haul, particularly on the tour bus/shuttle bus circuit. 

Eagle, how do you have one shoe not adjusted right on an air brake?  On mine the only adjustment is the slack adjuster and it adjusts both shoes.  Just wanting to learn more...

Up here commercial buses get an over-the-pit documented inspection every 30 days or 12K kilometers.  They said improper maintenance didn't seem to be a factor, which I have no idea how they would know that so soon.

Brian

Brian,
about the only way you can have just one of the brake shoes adjusted and the other not adjusted properly is if the axle is running wedge brakes. Instead of a slack adjuster you have an air brake chamber activating a wedge between the shoe rollers.

Ken

 66 
 on: October 23, 2014, 03:55:28 PM 
Started by krcevs - Last post by krcevs
Great information guys! I like the idea of being able to pull the tanks and refill them. The BBQ 30# tanks are available almost anywhere so I might go for the tank switch idea and carry 4 of them.

Ken

 67 
 on: October 23, 2014, 03:51:39 PM 
Started by eagle19952 - Last post by eagle19952
I don't have a bowl???


Sent from my iPhone using Tapatalk. Clumsy fingers may contribute to mistakes.


Not all do...Wix and NAPA do, it is an alternative.
See my post Detroit Fuel Filter ref below....

http://www.busconversions.com/bbs/index.php?topic=28226.0

 68 
 on: October 23, 2014, 03:47:46 PM 
Started by Geom - Last post by Dave5Cs
George we leave ours aired up all the time 70 lbs in front and 80 in back while driving unless a long tipped road then I adjust to the tilt and so on. When parked we adjust to level at a campspot each corner. I have it plumbed to each corner through paddle valves. When we are parked at the ranch I leave it on one side full and the other side at 20 front and 30 in the back because where I park the bus has a tilt to it to drain water away from it. Never had a problem leaving air in it. Some drop it down because they don't care for the floating feeling while walking around in their coach when parked. Our's is pretty stable either way.
We also have a compressor that when we get ready to leave and need to adjust air before we get on the road from campground then I just turn a 1/4" ball valve and start the extra compressor we have in the bay and let it fill the brake system and then adjust the bags if needed to travel without running the engine.
You should be fine as long as you drain your tanks because shop compressors develop a lot of water and slug that will push through the system if you don't.

Dave5Cs

 69 
 on: October 23, 2014, 03:47:14 PM 
Started by Geom - Last post by akroyaleagle
That's how it should start.

 70 
 on: October 23, 2014, 03:14:23 PM 
Started by Geom - Last post by PP
Our Prevost came with the levlow system. When we park, I use the control valves to level up the bus and then place wood blocks under the rear engine cradle and frame (4 points) because the rear will leak down in a few days while the front stays up and level for eternity. This keeps us level and solid when parked for longer than a few days (usually by the month or longer) and the bags aren't crushed from being deflated. We also have a portable compressor built into the area behind the front bumper that I can turn on to pre-air everything before firing up the diesel so we can get moving faster. I originally installed it to keep the bus leveled while parked, but I couldn't adjust to the sound of it coming on in the middle of the night. It usually only comes on once a day when parked like that though.
Will

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