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 51 
 on: December 02, 2016, 05:05:27 PM 
Started by matzeinusa - Last post by usbusin
BCM = ?

"USBUSIN" is the license plate I had on my "bus" err coach.

 52 
 on: December 02, 2016, 04:49:34 PM 
Started by lostagain - Last post by Lin
I put one on our first 24ft motorhome and really liked it.  It had power steering, and I found the knob useful for maneuvering in tight spaces.  The first bus did not have one.  That had no power steering at first, and it would have been ridiculous to try turning the wheel with just one hand.  Of course, it could have worked at road speeds, but I never found it useful for that.  When we installed power steering on it, we just used a car pillar and wheel.  The steering was easy enough and the wheel small enough that I could do just as well with the palm of my hand.  I never even thought of installing a knob.  Now on this bus, we have power assist steering.  I never thought of putting one on.  I guess I just do not see the need since I take my time maneuvering anyway.

 53 
 on: December 02, 2016, 04:40:11 PM 
Started by matzeinusa - Last post by lostagain
When driving for Brewster's, and other companies, we always called buses buses, or cars, like train cars, trolley cars  and elevator cars. To this day, I still call my bus "the bus". I suppose I should call it "coach", since it is for sleeping and dining, but old habits are hard to break. I should have a sign made up for below the driver's window: "private bus".

JC

 54 
 on: December 02, 2016, 04:10:03 PM 
Started by lostagain - Last post by lostagain
When we drove buses up the road to Sunshine Village Ski Area(Banff), in the seventies before the first gondola was built, we had one hand on the steering wheel (sometimes), the 2 way radio mic in the other, and also a cigarette, a coffee, a sandwich, a newspaper, and an eye in the interior rear view mirror checking out a hot bunny five rows back. And we didn't have no spinner knob either! That was before distracted driving was invented when cell phones came on...

JC

 55 
 on: December 02, 2016, 03:38:47 PM 
Started by Linda-XL40-FL - Last post by Linda-XL40-FL
Uncle Ned, of course Kirby will still talk to you, LOL.  We "upgraded" the transportation, but the rest of ourselves is kinda lagging behind.

Paco Express, not sure if there will be any pickin' going on but bring your harps just in case.


 56 
 on: December 02, 2016, 03:35:09 PM 
Started by Gary Hatt - Publisher BCM - Last post by Gary Hatt - Publisher BCM
Don't forget about our Holiday Subscription Special.  A lot of folks have already taken advantage of this great deal.  Subscribe now to a 1-Year Print subscription to Bus Conversion Magazine for 25% off or a 1-Yr Online Digital Edition subscription of the magazine for 50% off.  If you subscribe to the Print Edition you also get the Digital Edition FREE if you include your email address in the subscription form. This is the deal of the century.  Check it out.

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 57 
 on: December 02, 2016, 03:29:00 PM 
Started by GiddyInn - Last post by Gary Hatt - Publisher BCM
Here is a blurb I just extracted from the MCI website.  Maybe this will also shed a bit of light on this subject.

Park Brakes - DD3 Brake Chambers
MCI coaches, with the exception of the Renaissance coach, all use DD3 brake chambers on the drive axle for the Park Brakes. When the park brakes are applied, air pressure is routed to the rear of the chamber that applies the brakes. At the front of the chamber are rolling "locks" which wedge themselves between the shaft and the body of the chamber. If the air were to leak off of the park brake diaphragm, these locks will hold the brakes in the applied position. To release these locks, you follow the steps listed below:

Start the coach and allow the air pressure to build to 120 pounds.
Release the park brakes by pressing down the park brake push/pull valve in the driver's area.

Firmly apply the Service Brakes. This causes the brake chambers to apply further than the park brakes had applied, and this releases the rolling "locks" from the shafts.

Two problems that have been encountered are listed below. Also listed will be the troubleshooting procedure for fixing it.

Park brakes will not release.

Usually having too much air pressure applying the park brakes causes this. In the air supply line for the park brakes is a pressure regulator which is set to 85 pounds. This is the amount of air pressure used to apply the park brakes, not the 120-pound system pressure. If this regulator is set too high, or the regulator has been removed, the brakes will be applied too firmly to be released by the service brake application. Setting this regulator too low will affect the stopping/holding capabilities of the park brake. 85# is the magic number to remember.

Air is leaking out of the R-14 relay valve located above the drive axle (On ABS equipped coaches, air leaks out of the modulator valve.)

In the DD3 brake chamber, the park brake diaphragm separates the park brake section and the service brake section. If this diaphragm develops a hole in it, air will leak into the service brake section. When the service brakes are not applied, this section is vented to the exhaust port on the relay valve (With ABS, the exhaust port on the modulator valve.) Any air entering the service brake chamber will be exhausted out immediately thus causing the illusion of a faulty relay valve (With ABS, the modulator valve.)

To troubleshoot this situation, remove the service brake airline from one of the DD3 brake chambers. (This is the middle hose on the chamber) If air is leaking out of the service brake port, that is the chamber with the leaking park brake diaphragm. If air is still leaking out of the relay valve and the hose in your hand, then it is the chamber on the opposite side of the axle (On coaches with ABS, air leaking out of the RH modulator valve would mean the leaking park brake diaphragm will be in the RH DD3 brake chamber, LH modulator valve would point to a leak in the LH side.)

 58 
 on: December 02, 2016, 03:01:27 PM 
Started by GiddyInn - Last post by bevans6
Brian, again an excellent description of the DD3 parking brakes function. I must point out though, that the push/pull valve is pulled to apply, and pushed to release the parking brakes. You might want to edit your post to correct that.

JC

Push, pull... english is my second language...  I talk fluent "forget" most of the time...  I always get that wrong.

I do think that if you are going to drive a bus with DD3 brakes, let alone pretend to maintain or work on one, knowledge of the system to this level of detail in mandatory.

Brian

 59 
 on: December 02, 2016, 02:54:24 PM 
Started by lostagain - Last post by Gary Hatt - Publisher BCM
We had these on the loaders I drove so it left one hand free to operate the bucket controls.  Never really needed on in a bus. However if I decide to take up cigarette smoking, then I may have to get one for the bus too.

 60 
 on: December 02, 2016, 01:21:32 PM 
Started by matzeinusa - Last post by matzeinusa
My coach has yellow stripes!
:-)
Matt

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