维修中我们发现,装Ⅱ号泵的柴油机的不少游车故障是7204圆锥滚柱轴承间隙太大引起的,圆锥轴承配合间隙过大后,造成凸轮轴轴向间隙过大,凸轮轴前后窜动,使调速器传动盘不能定位,迫使传动盘带着油门拉杆不断前、后移动,使供油量忽大忽小,造成游车;另外间隙过大,易使凸轮轴产生径向脉冲振动,也造成 Maintenance, we found that installed No. Ⅱ pump diesel locomotive failure is caused by a lot of 7204 tapered roller bearing clearance is too large, with tapered bore bearing clearance is too large, resulting in camshaft axial clearance is too large, camshaft before and after channeling So that the governor drive plate can not be positioned, forcing the drive plate with the throttle lever constantly before and after the move, so that fuel suddenly suddenly small, resulting in motorcycles; the other gap is too large, easy to make radial camshaft pulse Vibration, also caused