HOSE AS 4529106 - Caterpillar

If no oil pressure is indicated, STOP the engine. The engine will be damaged from operating without oil pressure.
Engine oil pressure - This gauge indicates the pressure of the engine oil. This pressure will be highest after a cold engine is started. The pressure will decrease as the engine warms up. The pressure will increase when the engine rpm is increased. The pressure will stabilize when the engine rpm and temperature are stable.If the load is stabilized but the engine oil pressure fluctuates, perform the following procedure:
Remove the load.
Reduce the engine speed to low idle rpm.
Check the oil level. Maintain the oil level between the "ADD" and "FULL" marks on the "LOW IDLE" side of the oil level gauge (dipstick).
Inspect the lubrication system for leaks.
Coolant temperature - This gauge indicates the temperature of the engine coolant at the outlet for the jacket water. The temperature may vary according to the load. Do not allow the temperature to exceed the boiling temperature of the pressurized cooling system.The sensor for coolant temperature must be fully submerged in order to detect the temperature correctly. If the engine is operating above the normal temperature range, perform the following procedure:
Reduce the load and/or the engine rpm.
Inspect the cooling system for leaks.
Determine if the engine must be shut down immediately or if the engine can be cooled by reducing the load and/or rpm.
System voltage - This gauge indicates the voltage of the electrical system. Normally, the system has 24 volts.The engine is electronically controlled. The engine requires an isolated 24 volt DC power supply in order to operate. The system voltage can not be interrupted for more than 0.25 seconds. The system voltage can not be interrupted three times within a seven second period. If the power supply is removed or disconnected, the engine will not operate.
Fuel pressure - This gauge indicates fuel pressure to the fuel injection pump from the fuel filter. A decrease in fuel pressure usually indicates a dirty fuel filter or a plugged fuel filter. As the fuel filter becomes plugged, there will be a noticeable reduction in the engine's performance.Tachometer - The tachometer is a digital display on the instrument panel. The tachometer displays the engine rpm. The high idle rpm and the rated rpm are printed on the engine Information Plate.
Hour meter - The hour meter is a digital display on the instrument panel. This meter indicates the total number of hours of engine operation.Note: For further descriptions of the gauges, see this Operation and Maintenance Manual, "Instrument Panel" topic.Indicators
For a description of the indicators, see this Operation and Maintenance Manual, "Instrument Panel" topic.