长螺旋钻机维修过程中需要注意的忌讳（During the maintenance of long spiral drill, we should pay attention to the taboo）.docVIP

长螺旋钻机维修过程中需要注意的忌讳（During the maintenance of long spiral drill, we should pay attention to the taboo） Need to pay attention to the long spiral drilling machine in the process of maintenance taboo In actual operation, use and maintenance personnel have many mistakes in practice, affecting the normal use of long spiral drilling machine. Avoid not to check the plunger travel allowance The plunger type fuel pump s trial, many maintenance personnel do not pay attention to check the piston travel allowance. The plunger travel allowance, refers to the plunger is a cam on the camshaft top first stopping point, can continue the upward movement. Adjust the fuel injection start time, can also check the travel allowance, because the wear stroke of plunger and the plunger sleeve margin, the. The plunger and the plunger sleeve wear, up to exercise a to start oil, so that the fuel injection start time delay. When screwing out the adjusting bolt or replaced with thicker adjustment pad, gasket, the lowest position of the plunger moves, the plunger travel allowance is reduced. So, in the fuel injection pump repair debugging, should first check the travel allowance, to determine whether also permits adjustment of injection pump. When the examination, according to the different structure of the fuel injection pump using the following different methods: a) rotation of the camshaft, the plunger top first stopping point, remove the oil outlet valve and valve seat, with vernier depth measurement. B) was the top piston top dead point, use a screwdriver to pry the spring seat spring plunger, the plunger is up to the highest point. Then use the measuring feeler inserted between plane and tappet adjustment bolt plunger. Plunger travel allowance standard is about 1.5mm, after the wear limit travel allowance shall be not less than 0.5mm. Avoid piston open flame heating The spiral drill piston and piston pin is fit, so in the installation of piston pin, piston expansion should be made, then, some