star
Well-Known Member
Oops. Someone on page 1 definitely said about pumping brakes to empty them. I think I'll just leave them well alone.
The double tyres at the back can be quite awkward to check pressure on. Before I had live in mechanic (!), I used to go to a tyre place near us and one of the guys would do the pressures for me, for a the price of a pint!
My understanding on the air tanks has always been you drain via the valve underneath, one on each tank and also the air suspension if you have it. This releases any gunk/oil/water that is in the tank. I also tend to leave my truck with air drained as it takes the pressure off the system and causes less leaks. The when you start and the pressure builds you can let the gunk out again. Any fleet vehicle of your age normally has a big sticker by the drivers door saying "DRAIN AIR TANKS DAILY".