I have a air leak indicated by the green hand on my pressure gauge. It goes all the way down in about 2 hrs.
The red hand stays constant. Can someone tell me what the 2 hands indicate and where one would most likely
find a leak that is causing the green indicator hand to go
down. Thanks in advance
I am not familiar with the air system setup on your '87 ORED. Generally, if your dash air pressure gauge has two "hands" (needles) it means your coach has two air tanks that are being monitored by the gauge.
On my '93 U280, the 2-needle air pressure gauge has a red and a white needle. The red one is for the "front" brake pressure tank. The white one is for the "rear" brake pressure tank. Both of these tanks are mounted at the front of the coach right behind the front fiberglass "bumper" cover.
Do you have a air system diagram for your coach?
Check valves , if it runs down the road OK.