Operation and Maintenance Manual of WP13C Series Diesel Engines
Weichai Power Pursuit of Excellence
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Caution:
O-ring and seal gasket of high pressure fuel inlet joint can be used only for one time.
4. Cooling system
The cooling system has the function of ensuring the continuous work of diesel engine at suitable
temperature, and the forced circulation cooling provides the best guarantee for quickly reaching the
operation temperature, see figure 2-6 for cooling system diagram. The cooling system mainly includes the
following parts: water pump, water tank radiator (intercooler), diesel engine coolant cavity, oil cooler,
thermostat and water pipes, etc. The cooling system is a closed circulation system, mainly used for cooling
the oil and the diesel engine and ensuring continuous work at the suitable temperature. The cooling
circulation is divided into long circulation and short circulation. When the diesel engine water temperature
is low, the thermostat closes, and the coolant enters the diesel engine water pump through the thermostat to
quickly increase the water temperature. When the diesel engine water temperature reaches 76
℃
, the
thermostat opens, and the coolant enters the water tank radiator for cooling.
For the WP13C series diesel engines, there is a water drainage port on the engine body and the oil cooler
cover respectively for draining the water (figures 2-7 and 2-8).
Caution:
After stopped in winter or cold regions (environment temperature below 5
℃
), if there is no
antifreeze in the coolant, open the plugs on the engine body and the oil cooler simultaneously to drain the
coolant to prevent the engine body from frost cracking.
