Isuzu AU-4LE1T, Maintenance Manual

Page: 50 / 126

45
4. CARE IN THE ENGINE OPERATION
In the engine operation, always pay attention to the following items if the
engine indicates any sign of abnormalities.
(1) Engine Oil Pressure
Engine oil pressure is normal when the oil pressure gauge shows the
values of the following in the engine warmed-up condition.
Oil pressure : 147 kPa (21 psi) /1000min
-1
294 kPa (43 psi) /1800min
-1
343 to 686 kPa (50 to 100 psi) /2200min
-1
In the continuous engine operation, engine oil pressure is slightly lower
than the pressure at start-up time.
Also, make sure that the oil warning lamp is off.
If, in continuous engine operation, the engine oil pressure warning
lamp is off, engine oil pressure is normal.
When the engine oil pressure gauge shows the following abnormal
conditions, stop the engine immediately and check the engine oil
amount in the oil sump and oil leakage:
•
The engine oil pressure gauge shows below 200 kPa (28 psi)
though the engine speed is raised.
•
The oil pressure gauge indicator oscillates greatly in the engine
low speed range.
•
When the engine oil pressure warning lamp goes on and off
repeatedly.
When not lack of engine oil or no oil leakage is found, contact your
equipment supplier to determine the cause of the abnormal reading.