Maintenance Manual of 4M11 Series Diesel Engine For Land Power Generators
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③Disassemble the hexagon head bolts and spring washers from the water pump and disassemble
the water pump.
④Disassemble the washers and intermediate pads of water pump.
4.8.2.3 Inspection and Maintenance of Water Pump
①Check whether the water pump gasket is broken or has other damages, and replace the defective
gasket if any.
②Observe the bolts and studs for presence of damage (such as thread scratch). If yes, replace with
new one.
③Observe the water pump and intermediate pads for presence of damages (such as cracking). If yes,
replace with new one.
4.8.2.4 Water Pump Assembly Procedures
Assembly Procedures are in the reverse order of Disassembly .
4.8.3 Disassembly, Inspection, Repair, and Assembly of Thermostat
4.8.3.1 Exploded View for Assembly of Thermostat
Figure 4-62 Exploded View for Assembly of Thermostat
4.8.3.2 Thermostat DisassemblyProcedures
As shown in figure:
①Disassemble the type 2 hexagon nuts, studs, and washers between thermostat cover and water
outlet pipe.
②Disassemble the thermostat cover.
③Disassemble the thermostat.
Built-in thermostat
Thermostat
Flexible corrugated gasket
Type 2 hexagon nut
Stud bolt
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