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(1)燃油系中的柱塞、油嘴、出油阀,需要更换时必须成对更换。因为这属于选配件,精度很高,称为偶件。柱塞与柱塞套、出油阀与阀芯、油嘴体与针阀不可分开。否则,不能保证偶件密封。(2)活塞环损坏后,必须整组更换,不得只换一两个。不然,难以保证气缸的密封性。(3)连杆与连杆大端
(1) The fuel system of the plunger, nozzle, the valve, you need to replace the pair must be replaced. Because this is an option, high precision, called the couple. Plunger and plunger sleeve, the valve and valve, nozzle body and needle can not be separated. Otherwise, there is no guarantee that the coupling is sealed. (2) After the piston ring is damaged, the whole group must be replaced, not only for one or two. Otherwise, it is difficult to ensure the sealing of the cylinder. (3) connecting rod and connecting rod big end