0204046 JOHNSON NUT,Mounting screw

Ensure that the engine is stopped before performing this procedure. Attach a DO NOT OPERATE tag to the starting controls.
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 with the oil warm, immediately after the engine is stopped. 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.Note: Drain the oil into a suitable container. Dispose of fluids according to local regulations.
Drain the oil by using one of the following methods. Use the method that corresponds to the equipment on the engine.Note: If a suction device is used to remove the oil from the oil pan, ensure that the suction device is clean. This cleanliness 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 the engine has an oil drain valve, open the valve to drain the oil. After the oil has drained, close the valve.
If the engine has a pump for removing dirty oil, connect a hose to the outlet of the pump. Place the hose in a suitable container. Open the valve for the drain line. Operate the pump until the crankcase is empty. Close the valve to the drain line. Disconnect the hose.
If the oil drain valve has a “quick connect” coupling, attach the coupling. Open the drain valve to drain the crankcase. After the oil has drained, close the drain valve. Disconnect the coupling.
If the engine does not have a drain valve or a pump, remove an oil drain plug. Allow the oil to drain. After the oil has drained, clean the drain plug and clean the fitting for the drain plug. Install the drain plug. Tighten the drain plug to 145 15 N m (105 10 lb ft).Note: Ensure that the dirty oil is thoroughly drained from the pan. Caterpillar recommends a thorough cleaning of the oil pan with a vacuum and with rags to remove all old oil. This procedure will help prevent inaccurate oil analysis results and/or shortened life of the oil.
Replace the engine oil filter elements before filling the crankcase with new oil.
For the procedure to change the engine oil filters, refer to the Operation and Maintenance Manual, "Engine Oil Filter - Change" topic (Maintenance Section).
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 bubbles into the oil. These bubbles (foam) can cause the following problems: reduction of the oil's ability to lubricate, reduction of oil pressure, inadequate cooling, oil blowing out of the crankcase breathers and excessive oil consumption.Excessive oil consumption will cause deposits to form on the pistons and in the combustion chamber. Deposits in the combustion chamber lead to the following problems: guttering of the valves, packing of carbon under the piston rings and wear of the cylinder liner.If the oil level is above the "FULL" mark on the oil level gauge, drain some of the oil immediately.
Note: For the appropriate oil to use, and for the amount of oil to use, refer to this Operation and Maintenance Manual, "Refill Capacities and Recommendations" article (Maintenance Section).
Remove the oil filler cap. Fill the crankcase through the oil filler tube only. Clean the oil filler cap. Install the oil filler cap.
To prevent crankshaft damage and to prevent bearing damage, manually operate the prelube pump with the fuel supply line closed for 15 to 30 seconds. Or, crank the engine with the fuel supply line closed for 15 to 30 seconds. These procedures will ensure that all oil filters are filled with oil before the engine is started.
Close the fuel supply line. Crank the engine until the oil pressure gauge indicates 70 kPa (10 psi). Open the fuel supply line. Allow the starting motor to cool for 2 minutes before cranking again.
Follow this Operation and Maintenance Manual, "Starting The Engine" procedure (Operation Section). Operate the engine at low idle for 2 minutes. This procedure will ensure that the lubrication system and the oil filters are filled with oil. Inspect the engine for oil leaks. Ensure that the oil level is between the "ADD" and the "FULL" marks on the "LOW IDLE" side of the oil level gauge.
Stop the engine and allow the oil to drain back into the sump for a minimum of 10 minutes.
Remove the oil level gauge and check the oil level. Maintain the oil level between the "ADD" and the "FULL" marks on the "ENGINE STOPPED" side of the oil level gauge.