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A pressure reading or warning that fails to respond when air supply varies points to the pressure switch, and the Automann Air Brake Pressure Switch is the replacement for Freightliner Columbia and Century trucks. The switch senses air pressure in the brake circuit and opens or closes an electrical contact, which sends a signal into the vehicle's wiring. Its 60-75 PSI range sets the pressure band where the contact changes state. With the Automann 577.46606 in the line, the air brake system reports pressure swings again.
| Brand | Part Number |
|---|---|
| ATM577.46606 | |
| WORLD AMERICAN | WA06-0035 |
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