BEARING 8K6276 - Caterpillar

The maintenance intervals that are listed in this Operation and Maintenance Manual, "Maintenance Interval Schedule" are expressed in service hours. A more accurate figure to use is fuel consumption. Fuel consumption corresponds more accurately to the engine load.Table 1 lists average ranges of fuel consumption and service hours. Use the range of fuel consumption only as a guideline.
Table 1
Top End Overhaul
Service Hours and Fuel Consumption for 3500B Industrial Engines    
Engine     4000 Service Hours    
3512B    
787 500 L (208,030 US gal)    A top end overhaul involves the removal, the inspection, and the rework of the cylinder head components. Some additional components are replaced and serviced.Your Caterpillar dealer can provide these services and components. Your Caterpillar dealer can ensure that the components are operating within the appropriate specifications.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.If you elect to perform an overhaul without the services of a Caterpillar dealer, be aware of the following recommendations.Cylinder Head Assembly
Inspect the cylinder head assembly according to the instructions that are in Caterpillar reusability publications. Refer to Guidelines for Reusable Parts and Salvage Operations, SEBF8029, "Index of Publications on Reusability or Salvage of Used Parts".Your Caterpillar dealer can provide these services and components. Your Caterpillar dealer can ensure that the components are operating within the appropriate specifications.The use of out-of-spec parts will cause unscheduled downtime and/or costly repairs.Fuel Injectors
Replace the fuel injectors. Consult your Caterpillar dealer about exchanging the fuel injectors. Your Caterpillar dealer can provide these services and components.The wear of fuel injectors is affected by the following considerations:
Quality of the fuel
Quality of the filtration of the fuelThe wear of the fuel injectors can result in elevated levels of exhaust emissions and/or poor engine performance. The misfire of a single cylinder is not typically attributed to normal wear. This condition can be repaired by replacing the faulty fuel injector.The following list of circumstances indicate that the fuel injectors should be inspected more frequently:
Use of fuels that are not recommended in this Operation and Maintenance Manual, "Fuel Specifications"
Extreme ambient temperatures that reduce the ability of the fuel to provide lubrication
Frequent plugging of the fuel filters
Insufficient maintenance of the fuel tank or the fuel storage tank that can allow excessive water, sediment, etc.
Insufficient maintenance of the fuel filtersOil Suction Screen
Clean the oil suction screen after the oil has been drained.Note: Approximately 1 L (1 qt) of oil will remain in the housing after the sump has been completely drained. This oil will pour out of the housing when cover (1) is removed. Prepare to catch the oil in a pan. Clean up any spilled oil with absorbent towels or pillows. DO NOT use absorbent particles to clean up the oil.
Remove the screen assembly according to the instructions in the Service Manual, "Disassembly and Assembly" module. Discard the used O-ring seals.
Wash the screen assembly in clean nonflammable solvent. Allow the screen assembly