A presentation addendum on the Racor Fuel system upgrade has been created. The presentation shows an original Win 200200 fuel filter with the fuel entering the bowl. Why this is important is that there is substantial leakage on the fuel bowl system that has reduced the fuel flow through the injectors. The fuel injectors are cooled by the diesel fuel, not all the fuel is burnt that flows through the filter, the largest part is used to cool the injectors and then returned to the fuel tank. There is an explanation based on conversations with the CAT Tech support person and documentation files that can be uploaded. The link follows.
https://safaritoonces.org/safari-toonces-the-beginning/site-overview/mechanical/fuel-system/racor-fuel-system-addendum/