Let me explain a little more, here is a good example, I drive to Speedco for a oil change, I park over the lube pit and in 15 minutes it starts to sag on the left rear side, within an hour its down 2 inches, if I recall the air pressure gauge is at 90-110 on both tanks, if I wait for 24 hours one is down to about 60 pounds, or both, not real sure, If I use air leveling say at a campsite, it levels fine and holds, the little 12v aux air pump may come once every 4-5 hours or so but only for maybe 3 minutes. As far as the tank air drain valves, both were leaking slightly, I replaced both, that is fixed, I still have the air tire fill valve on the left side to check, I have a new ride height valve sitting on my work bench, but 5 days of rain it hasn't moved, this is a process for sure
Quote:
Originally Posted by RCLImperial
The normal leveling system will maintain its height controls when the engine is shut off as long as the air tanks have enough pressure. The ride height valves will add air to the air bags to make up for any leakage in the bags or their associated air lines between the ride height valve and the bag. So, from your description, I'd assume that your tank pressure is dropping at the same time. It's probable that your leak is between the ride height valve and the bag. There is also another thing to check which is the dump valve. There are 3 dump valves, one each for the rear bags, and one for the front bags which are connected together.
The air leveling system adds another layer of complexity as it must take the ride height valves out of the picture because they would fight the air leveling control. The ride hight valves are designed to maintain a constant height above the ground, while the air level system uses a sensor that maintains an absolute level. The air level also contains an auxiliary compressor to counter any leaks as the engine air compressor is no longer in play when the engine is off.
Those dump valves are nowhere near the rest of the system, so you may have missed soaping them. They are at the engine area for the rear bags and on the front wall for the front valves. You should also check the air access points at the front which are used to release the park brakes for towing.
Dick L 04 HR Imperial
|