CONTACTOR AS 4P7345 - Caterpillar

Engine Oil Pressure - Indicates engine oil pressure during operation. The indicator should be in the WHITE range at low idle engine speed or in the GREEN range at operating engine speed.
Engine Coolant Temperature - Indicates engine coolant temperature. The indicator should be in the GREEN range during engine operation.
Ammeter - Indicates condition of the battery charging circuit. The indicator should be on the plus (+) side immediately after the engine starts and then the indicator should return to ZERO (0).
Tachometer - Indicates engine speed (rpm).
Fuel Pressure - Indicates fuel pressure during operation and should register in the NORMAL (green) range. When the filter elements become clogged, the indicator moves to OUT. If the indicator registers below 140 kPa (20 psi), clean primary fuel filter and replace secondary fuel filter element.
Service Meter - Indicates the total service hours on the engine. Use to determine service intervals.