TM 9-2320-273-202-10. ENGINE RETARDER BRAKE CONTROLS.NOTEIn reading the following descriptionsmake sure that the throttle switch is inits normally-closed position.1.ENGINE RUN SWITCH. Energizes the 12-volt electrical system, including engine retarderbrake circuit.2.ENGINE RETARDER SWITCH. Three-position switch allows driver to select engine brakingfor two cylinders (LOW), four cylinders (MED), or six cylinders (HIGH). Depressing footpedal actuated switch completes 12-volt power circuit to energize one, two, or three solenoids.2-8
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