In all three embodiments, {HEAD ~ the drive mechanism} prevents {TAIL ~ the fuel distribution shaft} from rotating during the discharge of a pressurized pulse of fuel which creates high side loading and hence high frictional forces between the fuel distribution shaft and the surrounding housing bore 
In all three embodiments , { HEAD ~ the drive mechanism } prevents { TAIL ~ the fuel distribution shaft } from rotating during the discharge of a pressurized pulse of fuel which creates high side loading and hence high frictional forces between the fuel distribution shaft and the surrounding housing bore
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH