Opinions on air pressure and air up time
 

Opinions on air pressure and air up time

Started by Sebulba, September 09, 2025, 02:57:41 PM

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Sebulba

Hello all,

I think everything is functioning properly with me air system, but thought I would run it by you to be preemptive on any issues that may unknown to me.

First pic is pressure when driving.  Is this normal?

Second picture is pressure after sitting for 2 days.  It then took 3 minutes and 33 seconds to air up after sitting 2 days.

Does all of this seem normal?  Does it raise any concerns? 

Thanks

Seb


Back to the U.S. after 8 years in Europe.  
Bought a 1997 MCI 102D3 with Allison B500 on November 17, 2021 in Syracuse, NY.  Commenced living it that day and  drove it to Florida and New Mexico.  Converting as we go.  https://basicsuds.com

freds

Looks a lot better then normal!!! Most air brake systems have some leakage, mine goes to zero in a couple of days, might go to 70 PSI over night.

You have nothing to worry about...

Sebulba

Quote from: freds on September 09, 2025, 05:02:06 PM
Looks a lot better then normal!!! Most air brake systems have some leakage, mine goes to zero in a couple of days, might go to 70 PSI over night.

You have nothing to worry about...

Thanks,  the drivers side rear goes down first and front last.

Seb
Back to the U.S. after 8 years in Europe.  
Bought a 1997 MCI 102D3 with Allison B500 on November 17, 2021 in Syracuse, NY.  Commenced living it that day and  drove it to Florida and New Mexico.  Converting as we go.  https://basicsuds.com

freds

Quote from: Sebulba on September 09, 2025, 05:41:46 PM
Thanks,  the drivers side rear goes down first and front last.

Seb

Might need to replace an air bag or two.

luvrbus

 1 side dropping is a leveling valve 95% of the time,do the simple DOT test build your air pressure up kill the engine , hold the brake pedal down for 60 seconds if drops over 4 lbs you have a leak in the brake system, if that passes, then if it drops your leak is the suspension system ,leveling valves are terrible about leaking and dropping one side
Life is short drink the good wine first

Sebulba

Quote from: luvrbus on September 13, 2025, 04:06:55 PM
1 side dropping is a leveling valve 95% of the time,do the simple DOT test build your air pressure up kill the engine , hold the brake pedal down for 60 seconds if drops over 4 lbs you have a leak in the brake system, if that passes, then if it drops your leak is the suspension system ,leveling valves are terrible about leaking and dropping one side

Thanks, I will give that a try next time I start it

Seb
Back to the U.S. after 8 years in Europe.  
Bought a 1997 MCI 102D3 with Allison B500 on November 17, 2021 in Syracuse, NY.  Commenced living it that day and  drove it to Florida and New Mexico.  Converting as we go.  https://basicsuds.com