Usage:
1. Be sure that the engine is filled to the correct level with SAE 10W-30 oil. If any other viscosity of engine oil is used, the information in the Engine Oil Pressure Graph does not apply.
2. Remove the engine oil pressure switch and connect the 1U5470 Engine Pressure Group to the main engine oil manifold at the location from which the engine oil pressure switch was removed.
3. Run the engine to get the engine oil temperature at 99°C (210°F).
NOTE: A 3°C (5°F) increase in temperature gives approximately 7 kPa (1 psi) decrease in engine oil pressure.
NOTE: Make sure engine oil temperature does not go above 115°C (239°F).
4. Keep the engine oil temperature constant with the engine at its rated rpm and read the engine oil pressure gauge.
5. On the Engine Oil Pressure Graph, find the point that the lines for engine rpm and engine oil pressure intersect (connect).
6. If the results do not fall within the "ACCEPTABLE" pressure range given in the graph, find the cause and correct it.
Engine failure or a reduction in engine life can be the result if engine operation is continued with engine oil manifold pressure outside this range.
NOTE: A record of engine oil pressure, kept at regular intervals, can be used as an indication of possible engine problems or damage. If there is a sudden increase or decrease of 70 kPa (10 psi) in engine oil pressure, even though the pressure is in the "ACCEPTABLE" range on the graph, the engine should be inspected and the problem corrected.