11-06-2017, 03:24 PM
On both my 77 coach (not mine now) and my current 93 coach the air tanks sit between the frame members near the front and rear axles. They are cylindrical with domed ends and drains centered on the bottom. If I recall correctly the location on the 77 was with one near the front axle and two near the rear (the rearmost was the "supply" or wet tank). On the 93 coach the location is as mentioned above.
The 77 coach came to me with no drier, not a good idea if traveling in the winter. I installed a Bendix AD-9 and never saw water again at any of the drains. The 93 came to me with a finned CR Brakemaster dryer. I sometimes found a bit of water in the tank drains. I changed it to a AD-9 and have yet to find any liquids at the tank drains. Yes, this dryer requires changing the desiccant cartridge occasionally, but I would rather minimize the water in my air system.
The 77 coach came to me with no drier, not a good idea if traveling in the winter. I installed a Bendix AD-9 and never saw water again at any of the drains. The 93 came to me with a finned CR Brakemaster dryer. I sometimes found a bit of water in the tank drains. I changed it to a AD-9 and have yet to find any liquids at the tank drains. Yes, this dryer requires changing the desiccant cartridge occasionally, but I would rather minimize the water in my air system.
Jon Kabbe
1993 coach 337 with Civic towed