Pumps are one of the most important components of a vehicle engine cooling system. The function of an engine pump is to pressurize the coolant to ensure that it circulates in the cooling system and accelerates the dissipation of heat. As a long-term operation of the device, the pump will also be used during the failure, how to repair these failures it, many people think this inspection is very complex, direct repair failure occurs, in fact, there are some small fault owners completely Can be solved, do not need to spend "wasted money." If the engine pump fails or is damaged during use, the following checks and repairs may be made.
1. Check the pump body and pulley wear and damage, if necessary, should be replaced. Check the pump shaft bending, journal wear, shaft thread damage. Check the blade on the impeller broken, shaft hole wear is serious. Check the water seal and bakelite gasket wear, such as more than the use limit should be replaced with new pieces. Check the bearing wear, available table measurement bearing clearance, such as more than 0.10mm, you should replace the new bearing.
2. Pump removed, can be decomposed in order. Parts should be decomposed after cleaning, and then one by one check to see if there are cracks, damage and wear and other defects, if serious defects should be replaced.
3 water seal and seat repair: water seal, such as wear from the groove, available emery cloth, such as wear should be replaced; water seal if any rough scratches, flat reamers or lathe repair. In the overhaul should be replaced when the new water seal components.
4. In the pump body with the following damage allow welding repair: the length of less than 3Omm, does not extend into the bearing hole cracks; flange with the cylinder cover has broken parts; oil seal seat hole damage. The pump shaft bending shall not exceed 0.05mm, otherwise it should be replaced. Impeller blade damage should be replaced. Pump shaft aperture wear serious replacement or set repair.
5. Check the pump bearing rotation is flexible or abnormal sound, bearing a description of the problem, should be replaced.
6. After the pump is assembled, rotate it with your hand, the pump shaft has no stagnation, and the impeller and the pump casing have no rub. Then check the pump displacement, if there is a problem, you should check the reasons and remove. If the pump fails, the coolant will not reach the appropriate place, its performance will not be effective, thus affecting the work of the engine. Therefore, we must strengthen the engine pump inspection.
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