[AT] Chevroplet 8500 Air brake issue

[Cecil Bearden]

Carl :

I have to remove the fittings that are somewhat of a bulkhead connector 
in the firewall.  the nut that holds them in is on the passenger side.  
Like all vehicles, there is no way to easily get to the area.  Removal 
of the dash is a 4 hour job at least, and it is mostly 25yr old 
plastic.  I have enough trouble with the plastic being broken at nearly 
every joint due to the rough roads here.  If I did not have a newly 
rebuilt engine and transmission, I would say it should be scrapped.  It 
is so ridiculous that a good truck is unusable due to a dash that is 
designed for 3 years...  I learned that the former county that had it 
was selling their dump trucks at 80K miles due to the dash problems.  
This was one of their dump trucks that was used one month then the dump 
bed was removed and the mechanic bed was installed.  It had very good 
care taken of it, but I have driven it about 1500 mles on these terrible 
roads with a lightweight gooseneck hitch and pintle drawbar, and it just 
has fallen apart. I have access to some old Coca Cola trucks like it for 
parts, but removing and replacing the dash with that nearly 2 inch 
bundle of wiring is a real mess..

Cecil

On 1/18/2022 8:31 PM, Carl Szabelski wrote:
> Cecil,
>
> Seems to me that there is a tool for easily disconnecting them, 
> remember seeing them somewhere. Maybe it was at Harbor Freight or 
> maybe Autozone. For the ones that I use on our reverse osmosis system, 
> I’ve learned to use a small screwdriver to make the disconnection, but 
> them I have plenty of room to do so.
>
>
> Carl
>
> On Tuesday, January 18, 2022, Cecil Bearden <crbearden at copper.net 
> <mailto:crbearden at copper.net>> wrote:
>
>     I have an air leak under the dash in my C8500 1998 Chevrolet
>     tractor mover.  I have the instrument cluster out and can barely
>     reach to the fittings in the firewall.  Ther eis one line that
>     goes from the parking valve to over the top of the steering column
>     to who knows where.  My leak is somewhere beyond the air valve. 
>     It really hisses.  I have replaced nearly all the fittings last
>     spring on this thing.  I have an alcohol tank ordered.  Those
>     quick connect fittings are a pain in the butt...  Does anyone have
>     any experience with these..  Maybe Steve W..???  The factory
>     service manual is $300+, and I have tried to download 2 times
>     today and it failed.  I will wait until tonight after midnight to
>     download...
>     Cecil
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