10. Cooling System
Preparing Documents ---------------------- 10.1
Failure Diagnosis ---------------------------- 10.2
Water Pump ---------------------------------- 10.3
10.1 Preparing Documents
Function of the cooling system:
The cooling method of the engine is water cooling. Water cooling, in which the water is used as the
heat conductor, is a method of cooling high-temperature components and then transferring heat to
the outside air, thus keeping the engine working under the optimum temperature.
Specific cooling circuit:
The cooling water entering from the crankcase goes to the cylinder water jacket through the water
channel of the crankcase, then goes upward through the cylinder cover, finally enters into the
radiator through the pipe to dissipate heat, and transfers heat to the outside air with the help of the
radiator’s fins.
10.2 Failure Diagnosis
Water leakage
Damaged seals
Broken pump assembly
Broken water hose
Over high temperature in cylinder block
Damaged blade of the water pump
10.3 Water Pump
Disassembly
Loosen the bolt, and remove the water pump sub
assembly.
①
①：bolt
②：water pump cover
②
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