81939M Mariner BUSHING

Note: Decrease the interval between oil changes by 20 percent and/or increase the API service classification of the oil for engines that operate at high load factors of 80 percent or more for extended periods of time. Refer to Special Publication, SEBU6251, "Caterpillar Commercial Diesel Engine Fluids Recommendations", "S O S Services Oil Analysis" in order to fully understand optimizing oil change intervals.The S O S oil analysis program analyzes used oil in order to determine if the oil change interval is suitable for your specific engine. Consult your Caterpillar dealer about establishing an oil analysis program for your engine.Drain the Oil
Do not drain the oil when the engine is cold. As the oil cools, suspended waste particles settle on the bottom of the oil pan. The waste particles are not removed when the cold oil is drained. Drain the crankcase when the oil is warm. This draining method allows the waste particles that are suspended in the oil to be drained properly.Failure to follow this recommended procedure will allow the waste particles to be recirculated through the engine lubrication system with the new oil.
After the engine has been operated at normal operating temperature, STOP the engine.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Cat Dealer Service Tool Catalog" or refer to Special Publication, PECJ0003, "Cat Shop Supplies and Tools Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.Dispose of all fluids according to local regulations and mandates.
Drain the oil according to the equipment on the engine.
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Oil drain
Open the oil drain. After the oil has drained, close the oil drain.
If a suction device is inserted into the oil pan, ensure that the suction device is clean. This will prevent dirt from entering into the oil pan. Be careful not to strike the engine oil suction tubes or the piston cooling jets.
If a suction device that attaches to the oil drain is used, ensure that the suction device is clean. Attach the suction device to the oil drain. Open the oil drain. After the oil has drained, close the oil drain and remove the suction device. Replace the Oil Filter Elements
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Oil filters
Remove each oil filter with a 1U-8760 Chain Wrench.
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Mounting base and gasket
Clean the sealing surface of the mounting base. Ensure that all of the old gasket is removed.
Caterpillar oil filters are built to Caterpillar specifications. Use of an oil filter not recommended by Caterpillar could result in severe engine damage to the engine bearings, crankshaft, etc., as a result of the larger waste particles from unfiltered oil entering the engine lubricating system. Only use oil filters recommended by Caterpillar.
Apply clean engine oil to the gasket of the new oil filter.
Do not fill the oil filters with oil before installing them. This oil would not be filtered and could be contaminated. Contaminated oil can cause accelerated wear to engine components.
Place the oil filter in position. Tighten the oil filter until the gasket contacts the base. Tighten the oil filter by hand for an additional 3/4 turn (270 degrees). Do not overtighten the oil filter. Inspect the Used Oil Filter Elements
Cut the used oil filter element open with a 175-7546 Oil Filter Cutter. Spread apart the pleats and inspect the filter material for metal debris. An excessive amount of debris in the element may indicate early wear or a pending failure.
Use a magnet to differentiate between the ferrous metals and the nonferrous metals that are found in the filter. Ferrous metals may indicate wear on the steel and the cast iron parts of the engine. Nonferrous metals may indicate wear on the aluminum parts, the brass parts, or the bronze parts of the engine. Parts that may be affected include the following components: main bearings, rod bearings, turbocharger bearings and cylinder heads.Due to normal wear and friction, it is not uncommon to find small amounts of debris in the oil filter. If an excessive amount of debris is found, consult your Caterpillar dealer in order to arrange for further oil analysis.Fill the Crankcase
Only use oils that are recommended by Caterpillar. For the proper oil to use, refer to this Operation and Maintenance Manual, "Refill Capacities and Recommendations" topic (Maintenance Section).
If the engine is equipped with an auxiliary oil filter system, extra oil must be added when filling the crankcase. If equipped with an auxiliary oil filter system that is not supplied by Caterpillar, follow the recommendations of the OEM.
Engine damage can occur if the crankcase is filled above the "FULL" mark on the oil level gauge (dipstick).An overfull crankcase can cause the crankshaft to dip into the oil. This will reduce the power that is developed and also force air