Maintenance Manual of 4M11 Series Diesel Engine For Land Power Generators
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4.8.3.3 Inspection and Maintenance of Thermostat
①Check the clamps for failure. If any, replace them.
②Check the coolant hoses for cracks. If any, replace them .
③Check the thermostat for breakage. If any, replace it.
4.8.3.4 Thermostat Assembly Procedures
Assembly is in the reverse order of disassembly.
The initial opening temperature is 76ºC and the full-opening temperature is 90ºC for the thermostat.
4.8.4 Disassembly, Inspection, Repair, and Assembly of Fan
4.8.4.1 Exploded View for Assembly of Fan
Figure 4-63 Exploded View for Assembly of Fan
4.8.4.2 Fan DisassemblyProcedures
As shown in Figure 4-55:
①Disassemble the connecting bolts and type 2 full-metal hexagon lock nuts between fan and fan
hub assembly and disassemble the fan.
②Disassemble the studs and type 2 full-metal hexagon lock nuts between fan hub assembly and
crankshaft pulley and disassemble the fan hub assembly.
③Disassemble the pulley.
4.8.4.3 Inspection and Maintenance of Fan
①Observe the fan, fan hub assembly, and pulley for presence of damage (such as cracking). If yes,
replace.
4.8.4.4 Fan Assembly Procedures
Assembly is in the reverse order of disassembly.
Water pump
intermediate
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