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Old 11-28-2021, 10:19 PM   #1
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High pressure air connector

I just watched a YouTube video about airing up tires on an RV using the onboard compressor.

Also showed where the hook up was so a tow truck could air up the brakes.
Anyone know where it is on a 2005 Alfa?
I'm suspecting it's in the engine compartment somewhere, but it's dark outside right now and I am curious.
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Old 11-28-2021, 11:43 PM   #2
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They are usually in the left front basement door.
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Old 11-29-2021, 12:43 PM   #3
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I'm thinking it would have to be near the front for a tow operator to make the connection. JMHO
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Old 11-29-2021, 12:51 PM   #4
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Air OUTPUT from the secondary air tank on a Freightliner chassis can be found in the basement under the drivers seat on most chassis.

THIS IS NOT WHERE A TOW TRUCK OPERATOR SHOULD HOOK UP WHEN TOWING YOUR VEHICLE.

1. That is an output from the secondary tank. It does not feed backward into the primary (brakes and bags/elevation) because there are one-way valves that prevent backflow of the air.

2. If it were to appear that a tow truck operator was able to unlock the brakes and achieve ride height, he is actually only consuming the residual pressure from the primary system, which will eventually deplete, lower the chassis to the road if it is towed from the front and lock up the brakes while moving.

3. Air coming from the tow truck may not be dried or filtered - therefore if you force feed it backwards into the secondary tank you have contaminated that part of your system.

4. The only location to put air into the Freightliner is at the air dryer under the rig. A Schrader (bike tire looking hookup) is installed on the dryer so that any "outside" air has to go through the dryer and not contaminate the entire system.
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