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Maintenance and Service 79
Air Tanks
Drain the air system tanks at the recommended intervals. If condensation
accumulates, moisture can enter the brake system air valves, causing
corrosion or clogging. The safety of the brake system could be compromised,
leading to an accident causing severe personal injury or death.
When draining the air tanks, DO NOT look into the area of the draining
air. Dirt or sludge particles may be in the air stream that could cause eye
injury.
Air tanks should be drained daily. Make sure the drain cocks close properly
after draining. Empty moisture from air tanks by pulling the drain valve
lanyard or pull cord. The tanks should be checked for condensation fluid, even
if an automatic drain valve is installed.
It is very important that the air system is kept clean. If sludge or oil is found in
the drainage or an excessive amount of fluid is drained out of the tanks see
your authorized Volvo Truck dealer.
Air Dryers
Air dryers have a regeneration system that cleans out the accumulated
moisture but eventually the drying medium will be filled up. See your
authorized Volvo Truck dealer
Dryer manufacturers recommend changing the cartridge every 2 to 3 years but
the intervals need to be adjusted for vehicle application. In some climates, the
cartridge may have to be changed every year. See your authorized Volvo
dealer.
USA22978.bk.book Page 79 Wednesday, July 9, 2008 9:09 AM