05-27-2019, 12:22 PM
Have 2007 Coach 797 with Valid Air Trueline Leveling System. Two Thomas compressors. 166k miles.
Just came from Newell where they replaced 13 fittings on the air system, they replaced hoses and valves in the Bode door, did a wheel alignment that required an adjustment of a newly replaced front Height Control Valve.
In Montana at present where it's been nippy for us Florida thin bloods at around 4500 feet.
Coach Thomas compressors, at Newell, came on every 40 minutes for 30-45 seconds. Now coming on every 7 minutes for 40 seconds.
The Coach is leaning toward the passenger side and even with the Trueline leveling OFF, the driver rear side raises when the Thomas compressors come on.
The compressors come on less when the Coach has not been lowered and leveled out of Travel mode.
Have tried to Zero Set the Truelevel but to no avail. Seems to revert back. ?????
The Engine compressor brings Coach to Travel mode quickly and level.
Things done that could be related in last 2 years:
Newell replaced mx fittings 2 weeks ago
Bode Door hoses and valves fixed 2 weeks ago
All 3 HCV replaced within last year
Air Dryer filter replaced 1 year ago
Exhaust port purge valve on air dryer replaced
Travel Mode Valves replaced 11/16
Unloader on compressor replaced
Head relief valve replaced
Zero Set Leveled Coach at Newell and attempted myself (seemed like it accepted the code).
Check valve replaced in air tank by Newell 2 weeks ago
Questions:
Why would Trueline leveling try to level if turned off?
Have not replaced Solenoids. Could that be next step.
Could the raising of the driver rear be more the function of a problem with the front passenger air bag going down?
Airbags have not been replaced.
Have crawled around Coach with ultra-sonic headphones and soapy water (as has Newell). Was advised by Newell that as you fix the most obvious air leaks, the latent leaks then pop up. - basically a whack-a-mole issue.
Any other suggestions??
Will have looked at in Everett Washington when we get there on Thursday May 30th but would love to direct that facility with your wonderful knowledge.
Richard
Just came from Newell where they replaced 13 fittings on the air system, they replaced hoses and valves in the Bode door, did a wheel alignment that required an adjustment of a newly replaced front Height Control Valve.
In Montana at present where it's been nippy for us Florida thin bloods at around 4500 feet.
Coach Thomas compressors, at Newell, came on every 40 minutes for 30-45 seconds. Now coming on every 7 minutes for 40 seconds.
The Coach is leaning toward the passenger side and even with the Trueline leveling OFF, the driver rear side raises when the Thomas compressors come on.
The compressors come on less when the Coach has not been lowered and leveled out of Travel mode.
Have tried to Zero Set the Truelevel but to no avail. Seems to revert back. ?????
The Engine compressor brings Coach to Travel mode quickly and level.
Things done that could be related in last 2 years:
Newell replaced mx fittings 2 weeks ago
Bode Door hoses and valves fixed 2 weeks ago
All 3 HCV replaced within last year
Air Dryer filter replaced 1 year ago
Exhaust port purge valve on air dryer replaced
Travel Mode Valves replaced 11/16
Unloader on compressor replaced
Head relief valve replaced
Zero Set Leveled Coach at Newell and attempted myself (seemed like it accepted the code).
Check valve replaced in air tank by Newell 2 weeks ago
Questions:
Why would Trueline leveling try to level if turned off?
Have not replaced Solenoids. Could that be next step.
Could the raising of the driver rear be more the function of a problem with the front passenger air bag going down?
Airbags have not been replaced.
Have crawled around Coach with ultra-sonic headphones and soapy water (as has Newell). Was advised by Newell that as you fix the most obvious air leaks, the latent leaks then pop up. - basically a whack-a-mole issue.
Any other suggestions??
Will have looked at in Everett Washington when we get there on Thursday May 30th but would love to direct that facility with your wonderful knowledge.
Richard
Richard & Marla
2017 Newell
Coach 1608
4 slides
45' 8"
Cummins 600 Allison transmission 6 speed
F150 Toad
Porsche C4S cabriolet
F350
Cadillac Escalade