Maintenance Manual of 4M11 Series Diesel Engine For Land Power Generators
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pump, as shown in Figure 4-58.
4.9.2.3 Inspection and Maintenance of Oil Pump
① Check the engine oil pump for cracks. Check whether the inner cavity of the pump is smooth. If
necessary, disassemble the pump.
② Check the engine oil pump shaft for rotation stagnation. If yes, replace the engine oil pump.
4.9.2.4 Oil Pump Assembly Procedures
①Beforeassembly, check the oil pump for defects in manufacturing or application, and damage.
They shall be in good conditions.
②Clean the mating faces of the engine oil pump and crankcase;
③Assemble the engine oil pump.
④Assemble the two hexagon head flanged bolts and lock nut, and then tighten them.
4.9.3 Disassembly, Inspection, Repair, and Assembly of Engine Oil Filter
4.9.3.1 Exploded View for Assembly of Engine Oil Filter
Figure 4-67 Exploded View for Assembly of Engine Oil Filter
4.9.3.2 Engine Oil Filter DisassemblyProcedures
Unscrew the engine oil filter by special wrench, as shown in Figure 4-59.
4.9.3.3 Inspection and Maintenance of Engine Oil Filter
Check the engine oil filter assembly for damage. If any, replace it with a new one.
4.9.3.4 Engine Oil Filter Assembly Procedures
①Before assembling, check the O-ring of engine oil filter and ensure there is no manufacturing or
Engine oil filter
Engine oil filter holder
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