主机高压油泵讲解.doc

M V BEAGLE I THE HANSHIN DIESEL WORKS,LTD MAN BW 7S35MC Mk7 ENGINE No: 7S35MC Fuel Pump Roller Guide Checking 高压油泵滚轮导向机构检查 Roller guide mounted in engine 当机构装在高压油泵上时的检查 The fuel pump roller guide can be partially checked while mounted on the engine ,using the following procedure : 当机构安装在油泵上时,按以下方法可以对其一部分进行检查. 1. Lift the fuel pump roller guide .See Procedure 909-16 . 按909-16的步骤抬起导向机构 2. Remove the cover on the camshaft housing to inspect the fuel pump roller guide . 拿掉油泵上凸轮轴的盖板对机构进行检查. Turn the engine to provide the maximum space between the roller guide and the cam disc . 进行主机盘车到机构与凸轮片间空隙最大时停止 Turn the roller by hand to check that it can move freely and without unnecessary resistance or “hand” points . 用手转动滚轮,检查其是否转动得平稳,无额外阻力,容易转动 Also inspect the surface of the roller for possible damage marks ,seizures or scratches .Make sure that there are no traces of bearing metal left in the roller guide housing . 还要检查滚轮表面是否损坏,咬住或刮擦的痕迹,及里面是否有轴承金属的粉末等 Check the clearance in the slide bearing by lifting the roller relative to the roller guide and measuring the difference in distance between the cam disc and the roller in the upper and lower positions of the roller . 将滚轮提起,检查滑动轴承的间隙及当凸轮片在最高,最低位置时同滚轮间的间隙差 3. Lower the roller guide onto the fuel cam again . See Procedure 909-16 . 按909-16的步骤将导向机构放回凸轮上方 Roller guide removed from engine 当将滚轮导向机构卸下时的检查方法 A more suitable and reliable method is to check the roller guide and the bearing clearance after the roller guide has been dismounted : 更准确,更可靠的检查方法是将导向机构拆下后进行检查 4. Dismount the roller guide from the engine . See Procedure 909-15.2. 按909-15.2的方法将导向机构拆下 5. Check the surface of the roller and the sliding surfaces of the roller guide .and measure any ovalness . 检查滚轮的表面及导向机构的滑动表面,测量椭圆形的表面 6. Turn the roller g