0339288 JOHNSON CYLINDER HEAD, 50EL-50DTL

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 SAE10W40 is 400 to 480 kPa (58 to 69 psi) at rated rpm.A lower oil pressure is normal at low idle. If the load is stable and the gauge reading changes, perform the following procedure:
Remove the load.
Stop the engine.
Check and maintain the oil level.
Jacket Water Coolant Temperature - Typical temperature range is 82° to 94°C (179.6° to 169.2°F). This temperature range will vary according to engine load and the ambient temperature. A 100 kPa (14.5 psi) radiator cap must be installed on the cooling system. The maximum temperature for the cooling system is 108° C (226.4° F). The engine coolant temperature is regulated by the engine sensors and the engine ECM. This programming cannot be altered. An engine derate can occur if the maximum engine coolant temperature is exceeded.If the engine is operating above the normal range, reduce the engine load. If high coolant temperatures are a frequent event, perform the following procedures:
Reduce the load and the engine rpm.
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. If necessary, consult your Caterpillar dealer for assistance.
Tachometer - This gauge indicates engine speed (rpm). When the throttle control lever is moved to the full throttle position without load, the engine is running at high idle. The engine is running at the full load rpm when the throttle control lever is at the full throttle position with maximum rated load.
To help prevent engine damage, never exceed the high idle rpm. Over speeding can result in serious damage to the engine. Operation at speeds exceeding high idle rpm should be kept to a minimum.
Ammeter - This gauge indicates the amount of charge or discharge in the battery charging circuit. Operation of the indicator should be to the "+" side of "0" (zero).
Fuel Level - This gauge indicates the fuel level in the fuel tank. The fuel level gauge operates when the "START/STOP" switch is in the "on" position.
Service Hour Meter - The gauge indicates total operating hours of the engine.Indicator Lamps
Shutdown lamp
Warning lamp
Wait to start lamp
Low oil pressure lamp (On solid) and engine oil reset lamp (Flashing)For information, refer to this manual, "Monitoring System (Table for the Indicator Lamps)" for the sequence of operation of the shutdown lamp and the warning lamp.The function of the wait to start lamp is automatically controlled at engine start-up.The low oil pressure lamp has two functions.
The low oil pressure lamp is controlled by the engine ECM. If low oil pressure is detected, the lamp will be illuminated on solid. The reason for the illumination of the low-pressure lamp should be investigated immediately.
Low oil pressure lamp flashing, an engine oil change is required. The lamp must be reset, refer to this Operation and Maintenance Manual, "Engine Oil and Filter - Change" for more information.All lamps will illuminate for 2 seconds in order to check that the lamps are functioning when the keyswitch is turned to the ON position. If any of the lamps stay illuminated, the reason for illumination should be investigated immediately.Aftertreatment Lamps
For information on the aftertreatment lamp, refer to this Operation and Maintenance Manual, "Diesel Particulate Filter Regeneration".