The total amount of fuel consumption The service hours of the engine An increase of oil consumption An increase of crankcase blowby The wear metal analysis of the lube oil An increase in the levels of noise and vibration
An increase of wear metals in the lube oil indicates that the bearings and the surfaces that wear may need to be serviced. An increase in the levels of noise and vibration indicates that rotating parts require service.
Note: It is possible for oil analysis to indicate a decrease of wear metals in the lube oil. The cylinder liners may be worn so that polishing of the bore occurs. Also, the increased use of lube oil will dilute the wear metals.
Monitor the engine as the engine accumulates service hours. Consult your Caterpillar dealer about scheduling a major overhaul.
Note: The driven equipment may also require service when the engine is overhauled. Refer to the literature that is provided by the OEM of the driven equipment.
Using Fuel Consumption For Calculating the Overhaul Intervals Experience has shown that maintenance intervals are most accurately based on fuel consumption. Fuel consumption corresponds more accurately to the engine load. Tables 1, 2, and 3 list average ranges of fuel consumption and service hours for standard displacement engines. Tables 4 and 5 list average ranges of fuel consumption and service hours for high displacement engines. These tables are based on a load factor of approximately 60 percent.
Standard Displacement Engines
