INSTRUMENTS AND CONTROLS

Caution

The maximum safe oil temperatur e for MACK transmissions 121°C (250°F) for mineral - based 148°C (300°F) for synthetic Continued operation with oil above this temperatur e will cause rapid deterioration the s lubricating operties and NOT r Consult the vendor manual for non - MACK

20. Air Pressure Gauge Indicates the air pressure the air brake system(s). The normal operating air pressure between 759 kPa psi) and 897 kPa (130 psi) both air brake systems. pressure drops below psi (±5 psi) either system, the warning buzzer and warning light will on. Determine the cause failure before proceeding. Primary air pressure supplied the rear brakes and indicated the green pointer the gauge. Secondary air pressure supplied the steering axle brakes and indicated the orange pointer .

21. Park Brake V alve — Y ellow diamond - shaped Pull apply Push Applies the parking

Note: The parking brake DRL allows the daytime running lights f while the concrete pumper operation.

22. Ignition Switch Refer TING THE VEHICLE the OPERA TION section for specific starting procedures. Insert the key into the switch. T urn the key clockwise the position. T o crank the engine, turn the key clockwise push the optional starter button. T o shut down the engine, turn the key the left.

23. W indshield W iper/W asher Controls — Depress the ON/OFF button turn the windshield wipers Pull the button make the wipers faster , push the button down make the wipers slower Depress the ASH" button activate the washer