HOSE AS 2823650 - Caterpillar

The air lines to and from the air dryer must be at atmospheric pressure. If the air lines are not at atmospheric pressure, personal injury could result. Release the air pressure from the air system completely before performing maintenance.
Illustration 1 g00286490
Location of the primary air tank
Illustration 2 g00643899
(1) Drain valve for the primary air tank
Illustration 3 g00689332
(2) Drain valve for the secondary air tank
Open drain valves (1) and (2 ) for the air tanks.
Check for moisture in the air tanks. Close drain valves (1) and (2) for the air tanks.
Illustration 4 g00286805
Location of the air dryer
Illustration 5 g00689339
(3) Air dryer
If there is moisture in the air tanks, replace the desiccant cartridge or rebuild the desiccant cartridge of air dryer (3). Consult your Caterpillar dealer for information about replacing the desiccant cartridge and for instructions for rebuilding the desiccant cartridge. Note: Small amounts of moisture may be in the system due to condensation in the system. Moisture may also be in the system if an air dryer is installed on a machine that has been operating without an air dryer. Several weeks may be required in order to completely dry the system.