769D Off-Highway Truck and 771D Quarry Truck Caterpillar


Air Dryer Desiccant - Replace

Usage:

769D 5SS

------ WARNING! ------

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 1g00514841


Illustration 2g00514846

The air dryer is located behind the front wheel on the right side of the machine.

When the desiccant cartridge in the air dryer fails to absorb water, the desiccant cartridge must be rebuilt or the desiccant cartridge must be replaced.

Check for moisture in the air reservoirs.

If there is moisture in the air reservoirs, replace the desiccant cartridge or rebuild the desiccant cartridge. 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.

Caterpillar Information System:

793C Off-Highway Truck Machine Systems Rear Suspension (Cylinder) - Assemble
769D Off-Highway Truck and 771D Quarry Truck Air Dryer - Check
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769D Off-Highway Truck and 771D Quarry Truck Air Tank Moisture and Sediment - Drain
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769D Off-Highway Truck and 771D Quarry Truck Body Pivot Bearings - Lubricate
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