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M450 (Unique Issues) If you have a unique issue with your M450 model coach and it can't be answered in one of the other forums here, then this is where you can list it.....list your M450 Parts here too. NO DISCUSSION OF ANY OF THE M450 LAWSUITS ALLOWED HERE.

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  #1  
Old 10-16-2011
adieu2y adieu2y is offline
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Join Date: Feb 2010
Location: Glenn
Posts: 46
Default Replaced air dryer cartridge

The air dryer cartridge on our 40 LX had become water logged and we replaced it. This coach, a 2005 450 now with 48,000 miles and 6 years old, I thought it's time. Holland MH in Holland agreed.
Here is the surprise. The dryer is behind the rear axle above the base plate and wrapped in hydraulic and coolant hoses!
Here is the list from the work order:
1) drain radiator assy
2) remove lower coolant tube to radiator
3) remove coolant hoses
4) replace air dryer assy
5) replace broken air system check valve
6) clean and paint rusted lower coolant tubes
7) reinstall coolant tubes, hoses and coolant as needed.
Parts: $325.00
Labor About 8 hours.
Brent thought I was early but they do say to do it yearly.
Advice: put replacing the dryer off for as long as you can.
Has any one else experienced this?
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Jack and Ila VanDenBerg
Glenn, Mi. 49416
Un-ruffled Feathers

2001 Lx Sold
2005 450 Lxi Sold
2007 450 Lxi
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  #2  
Old 10-16-2011
Friday1 Friday1 is offline
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Join Date: Feb 2010
Location: Toledo
Posts: 1,545
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I never saw an air dryer that was water logged. I have seen some that were full of oil from compressors that were failing. Are you sure you don't have water in your air system from another source-like the blow out system for the water lines? Do you ever get water out of the air tanks when you drain them? It is normal to see water being expelled out of the purge valve at the bottom of the dryer. I am not familiar with your model of BB but have some heavy duty truck experience.

Rick in Ohio
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1980 FC35, 1961 PD4106 GMC SN:326 Charter member of the Two Bus Club for now
I am in Toledo, Ohio
Rick Gunther
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  #3  
Old 10-16-2011
Somervillebus's Avatar
Somervillebus Somervillebus is offline
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Join Date: Jan 2008
Location: Kingston Springs, Tn.
Posts: 883
Default

Quote:
Originally Posted by adieu2y View Post
The air dryer cartridge on our 40 LX had become water logged and we replaced it. This coach, a 2005 450 now with 48,000 miles and 6 years old, I thought it's time. Holland MH in Holland agreed.
Here is the surprise. The dryer is behind the rear axle above the base plate and wrapped in hydraulic and coolant hoses!
Here is the list from the work order:
1) drain radiator assy
2) remove lower coolant tube to radiator
3) remove coolant hoses
4) replace air dryer assy
5) replace broken air system check valve
6) clean and paint rusted lower coolant tubes
7) reinstall coolant tubes, hoses and coolant as needed.
Parts: $325.00
Labor About 8 hours.
Brent thought I was early but they do say to do it yearly.
Advice: put replacing the dryer off for as long as you can.
Has any one else experienced this?
not sure if its possible but I would be looking to relocate that unit somewhere more feasible.That sounds like **** poor engineering to me or am I missing something? a few extended lines and a more accessible mounting area should do the trick...just food for thought.
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Slim Somerville
Former owner 99 LXi
Kingston Springs, Tn.
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Old 10-16-2011
Friday1 Friday1 is offline
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Join Date: Feb 2010
Location: Toledo
Posts: 1,545
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I installed an AD-9 air dryer on my BB. There are specific requirements as far as were it has to be located in relation to the air compressor and the length of certain lines. Search out the PDF file for the model of system you have if you are relocating it. I still can't believe any vehicle would have left a factory in 1980 without an air dryer on it, but mine did. All three air tanks were full of water when I got it home. That really restricts the air capacity when the tanks have alot of water in them. My low air buzzer came on after every brake application.
Unless you are driving many miles each year, you shouldn't have to change the filter annually. There has to be another reason if the unit is full of water. The PDF file for your particular dryer will have a troubleshooting section and recommendations on how often it needs changed.

Rick in Ohio
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1980 FC35, 1961 PD4106 GMC SN:326 Charter member of the Two Bus Club for now
I am in Toledo, Ohio
Rick Gunther
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