Jan 1977
BRAKE SYSTEM AIR DRIER TLC INSTRUCTIONS
The CCE-IHC Dump Truck has an air brake system drier installed on the road side frame rail near the rear of the cab.
The air drier is plumbed between the air compressor and the first wet brake reservoir, as close to the reservoir as
possible. The air drier is of the desiccant (moisture absorbent crystals) type that removes and traps liquid contaminants,
airborne water vapor, and carbon particles and has an automatic spitter valve at the bottom to exhaust the collected liquid
waste. The air drier is purposely in an area of air flow, when the truck is in motion. Since the cooling effect of the airflow
is important to the life of the replaceable, desiccant crystals, make certain that the air flow is not interrupted by excess
mud, dirt, and dust. Also watch for excess buildup of paint on the housing which could interfere with proper transfer of
heated compressor air to the much cooler ambient air flow. The air drier, in concert with the wet and dry reservoir
automatic spitter valves, functions to keep moisture, compressor engine oil, and carbon particles out of the air system's
valves, brake chambers, and wiper motors. The air drier will keep the rest of the air system as maintenance free as
possible. A telltale sign that the air drier needs PM servicing is when the automatic spitter valve on the air reservoir under
the steps begins to exhaust excess moisture and sludge. This moisture and sludge should have been exhausted by the
air drier's spitter valve.
Periodically bleed the air system of all air pressure at the bottom, open the drier housing, and inspect and replace the
desiccant crystals inside the canister.
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