01-12-2016, 09:28 AM
This post is what I have found on my coach which has the HWH leveling system. If your coach is not exactly the same, it will be similar if you have the HWH system.
I've been doing an air line schematic to complement the rear suspension schematic that I've already done. Newell has basically set up three air systems that interrelate. The black air system is the brake system. The red air system is the suspension system. The blue air system is the house air system. The colors are designated by the color of air line that Newell used to "feed" the separate systems.
The first schematic is of the air lines of the differential lock solenoid, rear distribution block, rear air dryer and the rear six pack. The rear distribution block is mounted on the vertical wall just forward of the right rear engine compartment. The rest of the items are located in the right rear engine compartment. Follow the 1/4" black air line from the "in" of the differential lock solenoid and it will take you to the distribution block.
The second schematic is a "junction point" that on my coach is found on the rear wall of the left rear air spring tank. The left rear air spring tank is the one that is the most forward & sits above the transmission cooler with the double fans. This is where Newell chose to join the front & rear suspension air system (red), front & rear house system (blue) and the front and rear brake system (black). Newell provided two shut off valves that allows you to shut off either the red or blue systems or both. There is no shut off for the air brake system.
The "junction point" is very difficult to get a good picture of and get all the lines in it. These are the best I came up with.
To understand where the air goes we'll look at how it works by providing "shop" air to a totally drained air system on each test.
Test #1--Turn off both shut off valves and air is provided only to all three brake system air tanks, the brake dash gauge and the 3 gallon air tank in the first compartment on the right side. ***Not all coaches will have this 3 gallon air tank!
Test #2--Open the "red" circuit shut off valve and leave the "blue" valve closed. Air is now provided to all three brake air tanks, the brake dash air gauge, the 3 gallon air tank in compartment R-1, the front & rear 6 packs, and rear air dryer.
Test #3--Open the "blue" circuit shut off valve and close the "red" shut off valve. Air is now provided to the 3 gallon air tank in R-1, all three brake air tanks, both the brake & supply dash gauges, the 3 gallon air tank in the RR wheel well and the entire 12V air compressor air system.
Test #4--Open both the "red" & "blue" shut off valves and the entire coach receives air.
Hopefully this helps you understand how your system works and how each "circuit interrelates to each other......................................
I've been doing an air line schematic to complement the rear suspension schematic that I've already done. Newell has basically set up three air systems that interrelate. The black air system is the brake system. The red air system is the suspension system. The blue air system is the house air system. The colors are designated by the color of air line that Newell used to "feed" the separate systems.
The first schematic is of the air lines of the differential lock solenoid, rear distribution block, rear air dryer and the rear six pack. The rear distribution block is mounted on the vertical wall just forward of the right rear engine compartment. The rest of the items are located in the right rear engine compartment. Follow the 1/4" black air line from the "in" of the differential lock solenoid and it will take you to the distribution block.
The second schematic is a "junction point" that on my coach is found on the rear wall of the left rear air spring tank. The left rear air spring tank is the one that is the most forward & sits above the transmission cooler with the double fans. This is where Newell chose to join the front & rear suspension air system (red), front & rear house system (blue) and the front and rear brake system (black). Newell provided two shut off valves that allows you to shut off either the red or blue systems or both. There is no shut off for the air brake system.
The "junction point" is very difficult to get a good picture of and get all the lines in it. These are the best I came up with.
To understand where the air goes we'll look at how it works by providing "shop" air to a totally drained air system on each test.
Test #1--Turn off both shut off valves and air is provided only to all three brake system air tanks, the brake dash gauge and the 3 gallon air tank in the first compartment on the right side. ***Not all coaches will have this 3 gallon air tank!
Test #2--Open the "red" circuit shut off valve and leave the "blue" valve closed. Air is now provided to all three brake air tanks, the brake dash air gauge, the 3 gallon air tank in compartment R-1, the front & rear 6 packs, and rear air dryer.
Test #3--Open the "blue" circuit shut off valve and close the "red" shut off valve. Air is now provided to the 3 gallon air tank in R-1, all three brake air tanks, both the brake & supply dash gauges, the 3 gallon air tank in the RR wheel well and the entire 12V air compressor air system.
Test #4--Open both the "red" & "blue" shut off valves and the entire coach receives air.
Hopefully this helps you understand how your system works and how each "circuit interrelates to each other......................................
Steve Bare
1999 Newell 2 slide #531