Foretravel Owners' Forum For owners and Fans of Foretravel Motorcoaches September 13, 2025 ...

Air tank Screech.

December 10, 2017, 12:27:28 pm

When building air I have recently heard a screeching sound that appears to come from the Air Pressure Switch on the Front Brake Left Tank.  Can feel the vibration when holding the switch while the screeching occurs.  Could be wrong.

I presume I should replace this switch.  Anyone know the part # for this switch that is attached to the air brake tanks?

Your thoughts are appreciated.

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Re: Air tank Screech.

Reply #1 – December 10, 2017, 07:35:44 pm

What pressure does it occur at? Mine makes a noise when the chech valves on the front tanks start opening around 70 lbs or so.

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Re: Air tank Screech.

Reply #2 – December 10, 2017, 07:48:04 pm

Probably about the same.  70#+/-.

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Re: Air tank Screech.

Reply #3 – December 10, 2017, 08:33:33 pm

The noise only lasts not even a minute until the pressure equalizes.

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Re: Air tank Screech.

Reply #4 – December 10, 2017, 08:39:24 pm

Thanks for your response.

That is true but I had not heard it on my 2002 36' just recently on our 2001 42'.  It is ugly.

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Re: Air tank Screech.

Reply #5 – December 11, 2017, 12:24:21 am

@Scott have you tried spraying the switch with soapy water to see if it's leaking any air? That could be your noise. You could also try pulling the switch, clean the treads, apply sealer, and reinstall. You "might" get lucky...

see ya
ken

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