HOSE AS 4606630 - Caterpillar

If no oil pressure is indicated, STOP the engine. If maximum coolant temperature is exceeded, STOP the engine. Engine damage can result.
Engine Oil Pressure - The oil pressure should be greatest after a cold engine is started. The typical engine oil pressure with SAE15W40 is 500 100 kPa (72.52 14.50 psi) at rated rpm.
Jacket Water Coolant Temperature - Typical temperature range is 83° to 94°C (181° to 169°F). The maximum allowable temperature at sea level with the pressurized cooling system at 48 kPa (7.0 psi) is 100° C (212° F). Higher temperatures may occur under certain conditions. If the engine is operating above the normal range and steam becomes apparent, perform the following procedure:
Reduce the load.
Determine if the engine must be shut down immediately or if the engine can be cooled by reducing the load.
Inspect the cooling system for leaks.
To help prevent engine damage, never exceed the high idle rpm. Overspeeding can result in serious damage to the engine. Operation at speeds exceeding high idle rpm should be kept to a minimum.