PRESSURIZER 5413404 - Caterpillar

Illustration 1. Correct hole locations.Some adapters have been found with the hole drilled incorrectly as shown in Illustration 2. When this happens, the fuel line will block the hole and will not allow the injection transducer to pick up the impulse.
Illustration 2. Incorrect hole location.To correct the problem of an incorrectly drilled hole, use a high speed drill or similar tool and drill or grind a slot from the cross drilled hole to the bottom of the flared surface as shown in Illustration 3. This will allow fuel pressure to reach the injection transducer when the fuel line is installed.
Care must be taken to thoroughly clean all metal particles from the adapter before using.
Illustration 3. Add slot.