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Hot oil and components can cause personal injury. Do not allow hot oil or components to contact skin. |
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Ensure that the engine is stopped before performing this procedure. Attach a DO NOT OPERATE tag to the starting controls. |
Drain the crankcase with the engine oil warm, immediately after the engine is stopped. This draining method allows the waste particles that are suspended in the engine 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.
- Shut off the valve on the makeup oil tank.
- Use one of the following methods to drain the engine oil. Use the method that corresponds to the equipment on the engine.
- If the engine has an drain valve, open the valve. After the engine oil has drained, close the valve.
Note: If a suction device is used in order to remove the engine oil, ensure that the suction device is clean. This will prevent dirt from entering the engine oil pan. Be careful not to strike the engine oil pump's suction tubes or the piston cooling jets.
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Illustration 1 g00760363
Location of the drain or plug for the engine oil
- If the engine has a pump for removing the engine oil, connect one end of the hose to the outlet of the pump. Place the other end of 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 drain valve has a quick connect coupler, attach the coupler. Open the drain valve. After the engine oil has drained, close the drain valve. Disconnect the coupling.
- If the engine does not have a drain valve or a pump, remove the engine oil drain plug. After the engine 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: Make sure that all of the used engine oil is removed. If necessary, remove a side cover and inspect the engine oil pan. Dirty engine oil that remains in the oil pan will act as a catalyst which drastically reduces the service life of the new engine oil. If care is not taken, as much as 95 L (25 US gal) of used engine oil can remain in the engine oil pan.
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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, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products. Dispose of all fluids according to local regulations and mandates. |
- Replace the engine oil filter elements before filling the crankcase with new engine oil.
For the procedure to change the engine oil filters, refer to this Operation and Maintenance Manual, "Engine Oil Filter - Change" topic (Maintenance Section).
- Remove filler cap (1). Fill the crankcase through the filler tube only. Clean the filler cap. Install the filler cap.
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Only use oils that are recommended by Caterpillar. For the proper oil to use, refer to this Operation and Maintenance Manual, "Engine Oil" topic (Maintenance Section). |
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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. |
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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 amount of engine oil to use, refer to this Operation and Maintenance Manual, "Refill Capacities" (Maintenance Section).
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| Illustration 2 | g00760364 |
(1) Filler cap (2) Engine oil level gauge (dipstick) | |
- Open the valve on the makeup oil tank.
- Close the fuel supply line. Crank the engine until engine oil pressure is indicated on the engine oil pressure gauge. Open the fuel supply line. Allow the starting motor to cool for two minutes before cranking again.
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To prevent crankshaft damage or bearing damage, crank the engine with the fuel supply line closed. This will ensure that all of the oil filters are filled with oil before the engine is started. Do not crank the engine for more than 30 seconds. Allow the starting motor to cool for two minutes before cranking again. |
- Follow this Operation and Maintenance Manual, "Starting The Engine" procedure (Operation Section). Start the engine and inspect the engine for leaks. Ensure that the engine oil level is at the "FULL" mark on the "LOW IDLE" side of engine oil level gauge (2) .