东莞小成叉车培训叉车保养与维修一（Dongguan small forklift truck training forklift maintenance and maintenance 1）.doc

东莞小成叉车培训叉车保养与维修一（Dongguan small forklift truck training forklift maintenance and maintenance 1） Inspection and repair of domestic forklift water temperature anomaly 1. Check the thermostat The thermostat used on the engine is mainly waxed thermostat. Its main performance indicator is that the thermostat should have different lift in different water temperature. Thus, the cooling water temperature is controlled dynamically. For the non-disintegration cooling system to check the quality of the thermostat, it is mainly through the radiator inlet pipe and the temperature difference of the outlet pipe. In the early period of the start of the engine cold engine, the temperature difference between the water and the water can be significantly reduced after working for a period of time. When the engine reaches normal operating temperature (80 ℃ -- 80 ℃) with the hand touch feeling has no significant difference in temperature. The most accurate test is to take the thermostat, place it in hot water, and gradually heat it up to check the opening of the valve and the lift of the valve. 2. Water pump inspection Cooling water keeps circulating in the cooling system from the pump. Whether the pump can build up enough pressure is the key to the normal operation of the cooling system. When cooling water is added, the coolant surface decreases significantly with the increase of the engine speed, indicating that the pump is working normally. On the contrary, the water pump and impeller can be released, the cooling water can not circulate. In the domestic forklift engine, the pump, generator and cooling fan share a belt, so the tightness of the belt directly affects the speed of the pump, fan and generator. Press the middle of the belt with the finger, the lower deflection should be in the 11-13mm (CPC3L model) is normal, too general assembly causes the water temperature too high, too small will cause damage to the pump bearing and generator bearing. 3. Cooling fan The fan volume test c