唢油器试验器使用时间过久,柱塞会产生磨损。如果试验器柱塞磨损严重、密封不良,将直接影响喷油器试验的各项指标的准确性,因此,要定期检查和换新。检查试验器柱塞磨损程度的方法:将喷油器装在试验器上,用手柄压油,同时拧入喷油器压力调节螺钉,直到喷油器喷不出油为止。观察压力表指针,当压力达不到250～300公斤力/厘米~2时,即为试验器磨损严重。我们采用改制的方法给以换新,方法如下: 喷油器试验器所用柱塞与喷油器所用柱塞主要差别在于,前者不用在柱塞头部圆柱面上切斜槽,不 Slug tester for too long, the plunger will wear. If the tester piston wear serious, bad seal, will have a direct impact on injector accuracy of the indicators of the test, therefore, to regularly check and renewal. Check the tester plunger wear degree method: the injector mounted on the tester, with the handle pressure oil, screwed into the injector pressure adjustment screw until the injector can not spray the oil so far. Observe the pressure gauge pointer, when the pressure reaches less than 250 ~ 300 kg / cm ~ 2, the tester wear serious. We use the method of restructuring to give a new, as follows: injector test plunger and injector used in the main difference between the plunger is that the former does not have to cut the cylinder head cylindrical surface, not