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495Q型柴油机喷油泵的检查及调整共有五个项目:柱塞预行程的检查;起动油量及基准缸的选择;作用点和标定油量的检查及调试;最大扭矩储备的校正;怠速工况的检查。 1.柱塞预行程的检查(即供油开始时刻的检查) 将喷油泵安装在油泵试验台上,接通高压油路;将柱塞行程表架固定在台面上,让表头触滚轮体端部。转动油泵凸轮轴于下止点位置,此时柱塞行程表上的指针应指零值。接着再缓慢转动升高凸轮,当柱塞端部刚密闭进油孔、出油阀紧座口停止出油时,柱塞表的指针应指在3.8±0.05毫米之间,此即是柱塞的
495Q diesel fuel injection pump inspection and adjustment of a total of five projects: the plunger pre-stroke inspection; start the fuel and the reference cylinder selection; check and debug the role of the point and the calibration of fuel; maximum torque reserve correction; idling conditions Checked. 1. Plunger pre-stroke inspection (that is, the beginning of the fuel supply inspection) will be installed in the pump test pump pump test bench, connected to the high-pressure oil; the plunger stroke table fixed on the table, so that the head touch roller Ends. Turn the pump camshaft to the bottom dead center position, and the pointer on the plunger travel time should refer to zero. Then slowly turn the raised cam, when the plunger end has just closed the oil hole, the oil valve seat to stop the oil out of the mouth, the pointer of the plunger table should refer to the 3.8 ± 0.05 mm, which is the plunger of