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Old 02-28-2016, 11:34 AM   #1
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Air Brake Pressure Warning Alarm Failure

On the most recent DOT air brake test routine, the Alarm did not sound when the air pressure hit 60psi.

The park brake did engage properly.

Does anyone know where CC put that Alarm unit or how to fix it?
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Old 02-28-2016, 01:03 PM   #2
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Dean, I've had two Country Coaches and neither of them had a low air audible alarm.
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Old 02-28-2016, 01:28 PM   #3
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Ours has the Systems monitor w/ speech processor but never checked if it says anything or chimes with low air. The dash has a light up low air. I'm going to have to check mine in the spring and see what if anything mine does.
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Old 02-28-2016, 02:03 PM   #4
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Thanks guys.

I do not know why, but I seem to recall a low air alarm. This is the first time I focused on the alarm thing in the past several years so maybe age has caught up with me....

My dash warning light does work and the brake does apply automatically with low air pressure.

My lady-in-the-box made no comment about low air pressure.
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Old 02-28-2016, 02:31 PM   #5
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Duh... I remembered I have an Owners Manual.

It specifically says the alarm will chime at startup until the Air Pressure exceeds 70psi.

It also says the alarm will chime when PSI drops below 65psi.

I find "wire #77 to Dash Alarm" in the schematics.

I will have to trace that wire under the dash to see if there is an alarm.

I do know my oil pressure alarm works at startup.
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Old 02-28-2016, 05:08 PM   #6
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Dean-

The aural alarm on my Concept is a small (1.5"diameter) plastic two-wire speaker located under the dash next to the steering column. Mine is/was quite loud and the previous owner had placed some electrical tape over the front of the speaker to mute it to a more reasonable volume. It would not surprise me if a prior owner cut the wire as it is very loud, but I like the tape/muting approach. It's loud enough that you can't miss or ignore it, but not so loud as to terrify my 11 year old daughter who has noise sensitivity issues. Hope this helps.
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Old 02-28-2016, 05:16 PM   #7
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My Volvo low pressure alarm would only come on when the engine was running.

It made it difficult for the CDL test because I had to warn the tester that only the light would come on but not the audible alarm. The part of the CDL Air Brake test checking the low pressure is done with the engine off.
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Old 02-28-2016, 05:23 PM   #8
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Quote:
Originally Posted by Dale & Mark Bruss View Post
My Volvo low pressure alarm would only come on when the engine was running.

It made it difficult for the CDL test because I had to warn the tester that only the light would come on but not the audible alarm. The part of the CDL Air Brake test checking the low pressure is done with the engine off.

Ah..........these pesky electronic devices that demand electricity to perform!!

I will test on Wednesday with the ignition on and engine running. That is probably my problem (aside from a few dumb senior moments).

Thank you for being so reserved in your response.
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Old 02-28-2016, 05:43 PM   #9
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Quote:
Originally Posted by deandec View Post
Thanks guys.

I do not know why, but I seem to recall a low air alarm. This is the first time I focused on the alarm thing in the past several years so maybe age has caught up with me....

My dash warning light does work and the brake does apply automatically with low air pressure.

My lady-in-the-box made no comment about low air pressure.
I think you would get the gentleman voice for low air pressure.
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Old 02-28-2016, 07:03 PM   #10
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Only problem with the engine running, you are not going to get a low pressure alert unless to dump the air tanks.
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Old 02-28-2016, 07:55 PM   #11
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Quote:
Originally Posted by Dale & Mark Bruss View Post
Only problem with the engine running, you are not going to get a low pressure alert unless to dump the air tanks.
Do you think if you keep on stabbing the brakes the compressor can keep up?
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Old 02-28-2016, 08:05 PM   #12
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You should hope so
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Old 02-28-2016, 11:32 PM   #13
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I think the test would be to reduce the air pressure below 60 psi during the brake test, then start the engine to rebuild the pressure which is another part of the test.

The chime should be evident until 70 psi is reached. Unfortunately, I do not think it chimed.

I will know on Wednesday.
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Old 03-02-2016, 06:23 AM   #14
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Mine has been siting for a few months now with no air. When I turn the key to on position the low air light comes on in dash and a buzzer by the steering colum. I'm surprised the lady on the box says nothing.
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