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Cooling system
Notice in maintenance Disassembly of cooling pump
Troubleshooting Assembly of cooling pump
Notice in maintenance
Assembly and maintenance of cooling pump could be done only after its cover removed
No damage on two joint surfaces of cover of cooling pump is allowed.
Trouble shooting
In case there is failure in water cooling system, the engine may be overheated or
undercooled which bad for its performance, in this case, periodic maintenance and
troubleshooting for cooling system is necessary.
Coolant should be chosen according to different regions and temperature. The ice point of
coolant should be lower than its local lowest temperature, running or hard water for
substitution is not allowed due to water has cooling function only without functions of
antiscale, antifust, and raising boiling point, in this case, engine usually uses running and
hard water easily lead to rustiness on water pump shaft, scaling and bad heat radiation of
water passage, and overheating of engine.
Check coolant in water tank when engine is cold, in case much reduction is found, it
indicates there is coolant leakage, and further inspection for outside or inside leakage is
needed. View the color of oil could know the inside leakage of water cooling engine, in case
coolant entered oil, the oil may look milky white, under this situation, disassembly of engine
and inspection on parts related to water passage is needed, such as cylinder head, cylinder
body, gasket of cylinder head, and right crankcase.
Check outside leakage through viewing joints to cooling pump cover, heat radiator, auxiliary
water tank, and water pipes.
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