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Old 08-02-2014, 07:41 PM   #1
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2014 Forza 34T Air Brake Pressure

Hi All,

We have a 2014 Forza 34T, we were just wondering what your air brake pressure was?

When we first drove our Forza the pressure was around 75...we just got it back from having an Air Force One brake system installed and the pressure is now up to 135. On another forum, it was suggested that 75 is very low for a fully charged air system and that 135 sounds more correct. This is our first DP, so air brakes are new to us. It was suggested that perhaps an issue was corrected while the brake system was installed. Any thoughts? We will call the service dept on Monday. Thanks all!
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Old 08-02-2014, 07:45 PM   #2
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Air brake system pressure should be 120 psi , approx.
At 75 you were close to the point where the park brake would automatically engage and stop the rig due to lack of air.
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Old 08-02-2014, 08:04 PM   #3
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From the Freightliner RV chassis manual:
Primary and Secondary Air Pressure
Gauges
"IMPORTANT: Two separate air pressure gauges
indicate air pressure in the primary and secondary
air systems. Build air pressure in both systems
to 95 to 120 psi (620 to 827 kPa) before
moving. It is normal to observe fluctuation in
these gauges during operation of the vehicle"
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Old 08-02-2014, 08:24 PM   #4
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Holy Canoli!!! Our salesman said 75 was where it should be when we test drove it...being new to the diesel world we never thought to verify what we were told. Lesson learned! Thank Goodness for this forum!!

Thanks everyone!!
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Old 08-02-2014, 10:57 PM   #5
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Quote:
Originally Posted by jomo1989 View Post
Holy Canoli!!! Our salesman said 75 was where it should be when we test drove it...being new to the diesel world we never thought to verify what we were told. Lesson learned! Thank Goodness for this forum!!



Thanks everyone!!

Never Ever trust someone that there job is to take as much of your money as they can.
Jesse
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Old 08-02-2014, 11:02 PM   #6
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Miss-information about the air brake systems, is the main reason many states and provinces require special training and testing for coach owners.
Here in B.C. air brake ticket is required or your insurance is void.

You might want to check your state regulations.

For a free download of an air brake manual , helps with understanding and parts identification, visit.

http://www.suspensionspecialists.com...dbook_2009.pdf

Even if your system isn't Bendix, it's good info.
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Old 08-03-2014, 03:22 AM   #7
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Thank you all so much. Our salesman also told us the two gauges were left and right as opposed to primary and secondary. We will definitely take the time to read up...thank you for the links. We probably would have felt better if there were some type of training. We had a gas class A (Adventurer 38G) for 10 years and knew it inside and out...we are starting over with this new, smaller diesel coach.
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