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Author Topic: GM 4106 Air bag qquestion  (Read 2522 times)
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Posts: 2

« on: February 01, 2013, 05:55:20 PM »

My bus is parked with a rear air bag blown with the front driver side bag aired up. How can I let some air out of the front to level the bus out while im parked? Thanks
« Last Edit: February 01, 2013, 05:57:21 PM by Busfever » Logged
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« Reply #1 on: February 01, 2013, 06:28:49 PM »

Your gonna have to replace the air bag any who, why not just raise up the rear and block it now. all the best!
« Last Edit: February 02, 2013, 01:54:29 PM by Van » Logged

Ex 1989 Model 15 Predator class War Bird owner
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« Reply #2 on: February 02, 2013, 10:17:24 AM »

You can do what you want but you need to be extremely careful!!!

I would turn the wheels to one side or the other, put blocks under the body, air up the bus, unbolt the drop link to the leveling valve, remove blocks and remove yourself.  Use a broom stick to actuate the valve while standing next to the bus. 

Be careful.  Attaching it is much more dangerous. 

1964 PD4106-2853
Angola Coach Conversion "Aesop's Tortoise"
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« Reply #3 on: February 02, 2013, 11:09:37 AM »

This is cut & pasted from Bus Commander's similar thread:

Name??? -

Please help us help you!  Take a few minutes to edit your profile to include a signature line - similar to mine below - that includes at least your first name, home base city/state, and make/model of your coach.

By doing so, we can better refer you to parts sources, repair facilities and, as an added bonus, often a neighboring busnut!

What is the VIN on your coach?  PD4106-XXXX?

Do you have the maintenance manual & it's supplement?  There's a wealth of information in both, including air bag replacement procedures.  The parts book also has a bunch of exploded drawings to help you, too.  And an Operator's Manual will often answer "what is this for?"  All four should be in your library, five if you include a DD 8V71 manual.

If you don't have it already, memorize this number: 1-888-262-2434.  That's Luke @ US Coach in NJ.  He's probably forgotten more about GMC buses than all the combined knowledge on the major bus bulletin boards.  Strong supporter of our crazy hobby, knows the correct parts for the applications, reasonable prices and ships same day when you use plastic money.  Support those who support us!

Working on a 4106 is not much worse than working on a GM car, only bigger.

Crib blocking of the coach body is much safer than using jack stands.  Block on the main bulkheads on either side of the axles.  A 20-ton air over hydraulic jack is extremely helpful.

Check the leveling valves also - you may have a bad one, not a bad air bellow.

FWIW & HTH. . .


RJ Long
PD4106-2784 No More
S13406 1978 MC-5C Converted
S14947 1980 MC-5C Shell
Cheney WA
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