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Old 02-12-2013, 12:10 PM   #1
2013 Berkshire 390 BH-60
 
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Air retention

I picked up my 390BH last month. It is parked in the driveway and I have started it once a week. I've noticed that both air gauges are down to 0. Is this normal, the air builds up quickly. I would assume that it should hold air longer than a week. Should I think that possibly there is an air leak in the system? Anyone else have this issue?

Thanks!
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Old 02-12-2013, 01:09 PM   #2
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This is normal. As long as things pressure up in the allotted time when you go through your pretrip inspection. Simply follow the guideline that were laid out during your airbrake certification.
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Old 02-12-2013, 06:16 PM   #3
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Assuming he has an air brake cert.

IF it was new and mine Id be truckin right back to the dealer to find the leak .
IT MAY only get worse and leave you stranded

IT could have a bad "rubber" air line and go

Take it back !


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Old 02-13-2013, 11:57 AM   #4
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As lefaivre said, perfectly normal. You may get a couple days with it still holding some pressure but that would be it. If that. I know for sure mine will still hold pressure down around 50-60psi after 24 hours, but never checked to see how long till 0psi. Pefectly normal as every air brake system in the world does the same thing.
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Old 02-13-2013, 12:10 PM   #5
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Quote:
Originally Posted by speedmerchant View Post
As lefaivre said, perfectly normal. You may get a couple days with it still holding some pressure but that would be it. If that. I know for sure mine will still hold pressure down around 50-60psi after 24 hours, but never checked to see how long till 0psi. Pefectly normal as every air brake system in the world does the same thing.
My peterbilt holds 100 psi for weeks on end .
Exception to your statement?
Btw its a 2005 with 70, 000 miles

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Old 02-13-2013, 12:29 PM   #6
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Although yes some air loss if not all air loss is quite common especially in older vehicles after sitting even overnight.
As long as its within dot regulations its "ok"
But I would be concerned that there's a loose fitting or line that could be or can be fixed.
IT IS under warranty and I think most if not all of us spent 80 90 or a 100k on a recreation vehicle would expect it not to leak .
Jmo

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Old 02-13-2013, 04:18 PM   #7
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Originally Posted by f1100turbo View Post
My peterbilt holds 100 psi for weeks on end .
Exception to your statement?
Btw its a 2005 with 70, 000 miles

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I knew when I wrote "every sytem in the world" someone would chime in about that and have an exception. 1. You must burn alot of fuel in your Peterbilt idling for weeks on end to hold pressure and 2. You've got the only truck in the world that can do that....again joking.

As part of our business we have a fleet of various trucks and myself or my shop foreman has never in all our years seen a truck that holds pressure for more than a few days max. So hold on to that Pete' she's a good one.
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Old 02-13-2013, 09:50 PM   #8
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it is normal for the berkshire. if you put the levelers down you hear the system dumping the air and the airbags settle. the system is not like a truck.
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Old 02-13-2013, 10:02 PM   #9
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Originally Posted by speedmerchant View Post
I knew when I wrote "every sytem in the world" someone would chime in about that and have an exception. 1. You must burn alot of fuel in your Peterbilt idling for weeks on end to hold pressure and 2. You've got the only truck in the world that can do that....again joking.

As part of our business we have a fleet of various trucks and myself or my shop foreman has never in all our years seen a truck that holds pressure for more than a few days max. So hold on to that Pete' she's a good one.
its all good ! lol
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Old 02-13-2013, 10:23 PM   #10
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Two comments

I had referanced a pre trip inspection in my first reply. Below is the critical part of teh Air Brake check. As long as you pass this test and you do not hear and air leak ... I would say that you are good to go

Step Two:
Ensure all drain cocks are closed and bring system pressure to its maximum.
• Check to see that the low air pressure warning devices are working as required.

o
They should cut out at a minimum of 60 PSI.
• Check to see how long it takes to build up pressure from 50 to 90 PSI.

o
It must take less than 3 minutes with the engine running at 1200 RPM.
• Release tractor and trailer brakes and continue building system to maximum pressure.
• Check to see at what point the governor cuts out.

o
This pressure should be in the range of 120 to 130 PSI.


Second point
Someone asked if it is normal to hear a rush of air when putting down the jack. Yes ... at this point you are dumping all air from the system. This lowers the coach making the leveling process much easier ... also preventing that huge first step when level

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