HARNESS AS-ENGINE 4579172 - Caterpillar

Too Much Oil Consumption
Oil Leakage On Outside Of Engine
Check for leakage at the seals at each end of the crankshaft. Look for leakage at the oil pan gasket and all lubrication system connections. Look for any oil that may be leaking from the crankcase breather. This can be causes by combustion gas leakage around the pistons. A dirty crankcase breather will cause high pressure in the crankcase. A dirty crankcase breather will cause the gaskets and the seals to leak.Oil Leakage Into Combustion Area Of Cylinders
Oil leakage into the combustion area of the cylinders can be the cause of blue smoke. There are four possible ways for oil leakage into the combustion area of the cylinders:
Oil leakage between worn valve guides and valve stems
Worn or damaged pistons, piston rings, or dirty oil return holes in the piston
Incorrect installation of the compression ring and/or the intermediate ring
Oil leakage past the seal rings in the impeller end of the turbocharger shaftToo much oil consumption can also be the result if oil with the wrong viscosity is used. Oil with a thin viscosity can be caused by fuel leakage into the crankcase, or by increased engine temperature.Measuring Engine Oil Pressure
The engine oil pressure can be measured with the electronic service tool. The electronic service tool will also measure restrictions in the oil filter.
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1U-5470 Engine Pressure Group
Be sure that the engine is filled to the correct level with SAE 10W-30 or 15W-40 oil. The information in the engine oil pressure graph is invalid for other oil viscosities.
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Oil Manifold On The Right Side Of The Engine (1) Pressure test location.
Connect the 1U-5470 Engine Pressure Group to the main oil manifold at location (1) .
Obtain the normal operating temperature of the engine by operating the engine.
Keep the oil temperature constant with the engine at the rated rpm, and read the pressure gauge.Note: The engine oil temperature should not exceed115°C (239°F).
Locate the point that intersects the lines for the engine rpm and for the oil pressure on the engine oil pressure graph.
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Engine Oil Pressure Graph
The results must fall within the "ACCEPTABLE" range on the chart. A problem exists when the results fall within the "NOT ACCEPTABLE" range on the chart. The problem needs to be corrected. Engine failure or a reduction in engine life can be the result if engine operation is continued with oil manifold pressure outside this range.Note: A record of engine oil pressure can be used as an indication of possible engine problems or damage. A possible problem could exist if the oil pressure suddenly increases or decreases 70 kPa (10 psi) and the oil pressure is in the "ACCEPTABLE" range. The engine should be inspected and the problem should be corrected.Oil Pressure Is Low
Crankcase Oil Level
Check the level of the oil in the crankcase. Add oil if oil is needed. It is possible for the oil level to be too far below the oil pump supply tube. This will cause the oil pump not to have the ability