Perkins 4012 - Instrument Operation; Engine Coolant Temperature; Engine Oil Temperature; Ammeter

3
User’s Handbook, TSL 4186E, Issue 2 23
4012/16 Diesel
Instrument operation
Engine coolant temperature (A)
1 The temperature during normal operation should be between 65 °C - 85 °C (149 °F - 185 °F).
2 If the temperature should rise above 93 °C (200 °F) the engine protection switch will automatically stop the
engine.
3 Investigate the cause.
Engine oil temperature (B)
The lubricating oil temperature should be between 80 °C - 90 °C (176 °F - 194 °F) when the engine is hot.
Engine oil pressure (C)
1 The lubricating oil pressure should be between 300 - 350 kPa (45 - 50 lb/in
2
) when the engine is hot.
2 If the pressure should drop below 200 kPa (30 lb/in
2
) at engine operating speed the engine protection switch
will automatically stop the engine.
3 Investigate the cause.
Ammeter (D) (if fitted)
The ammeter indicates the charge rate to the batteries from the alternator.