User manual KOHLER KD425-2

[. . . ] Air Cleaner and Air Intake System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section 5. Electronic Fuel Injection (EFI) System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section 6. Lubrication System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section 7. Electrical System and Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section 8. [. . . ] Lift pump not working Diagnostic Aid #8 FUEL SYSTEM (fuel pressure) Possible causes for low fuel system pressure: 1. Lift fuel pump - insufficient fuel supply 5. Fuel pump (lift or module) - internally plugged Possible causes for high fuel system pressure: 1. Pressure regulator not functioning properly inside fuel pump module. Diagnostic Aid #9 BASIC ENGINE (cranks but will not run) Possible causes: 1. Refer to basic engine troubleshooting charts within service manual sections 3, 5, and 7. 5. 38 Section 6 Lubrication System General This engine uses a full pressure lubrication system. This system delivers oil under pressure to the crankshaft, camshaft, and connecting rod bearing surfaces. In addition to lubricating the bearing surfaces, the lubrication system supplies oil to the hydraulic valve lifters. A high-efficiency gerotor pump is located in the closure plate. The oil pump maintains high oil flow and oil pressure, even at low speeds and high operating temperatures. A pressure relief valve limits the maximum pressure of the system. Change the oil while the engine is still warm. The oil will flow more freely and carry away more impurities. Make sure the engine is level when filling or checking oil. To keep dirt, debris, etc. , out of the engine, clean the area around the dipstick; remove the dipstick. Remove the oil drain plug on the starter side or the drain plug oil filter side. See Figures 6-5 and 6-6. Dipstick Figure 6-3. The level should be between the F and L marks. If low, add oil of the proper type (refer to Oil Recommendations on page 6. 1) up to the F mark. Reinstall oil fill cap and dipstick. Oil Drain Plug Starter Side Operating Range Figure 6-5. Location of Oil Drain (Starter Side). Figure 6-4. Oil Level Marks on Dipstick. 6. 2 Section 6 Lubrication System Oil Drain Plug Oil Filter Side Figure 6-6. [. . . ] lb. ) and the outer screw to 2. 8 N·m (25 in. See Figure 10-89 Torque the plugs to 13. 6 N·m (10 ft. NOTE: Make sure that both oil drain plugs are installed and torqued to these specifications to prevent oil leakage. 10. 24 Section 10 Reassembly Prepare the Engine for Operation The engine is now completely reassembled. Before starting or operating the engine, be sure to do the following. [. . . ]