Are you saying that the injection pump "vee" needs to be timed (inserted) so that it can be seen in the governor's hole at 24 degrees before TDC? I did notice that 15 degrees ATDC made it easier to insert the vacuum diaphram without having to use force and the slope or curve in the vacuum pump which the roller inside the vacuum pump rides on is grooved or indented at approximately 15 degrees ATDC and the vacuum pump will bolt right up with no problem. Are you saying that 15 degrees is for a purpose like that and had nothing to do with pump injection timing?

BenzDiesel