SEAL-BANJO 2977985 - Caterpillar

Use care when performing any engine service procedure that requires disconnecting the injector harness from the injectors. This helps to prevent future injector and/or injector harness connector failures
Note: Do not pull on the harness wires in order to remove the connector from the injector.Note: Do not apply excessive force to the connector body during removal.
Illustration 1 g03715963
(1) Dark area is damaged by electrical arcing.
When injector faults are present, carefully inspect the injector connector pins for arcing. Replace the suspect injector, and injector harness assembly when evidence of pin arcing is present.Note: Do not use socket connector repair kits at injector connections on engines utilizing this over-molded design. Wire length is critical in order to avoid contact with other components.
Ensure that the injector harness connector is fully engaged until the locking tab clicks into place.A new service tool is being developed in order to aid the technician with disconnecting and connecting the injector harness connectors.Until the new service tool is available, modified long needle nose pliers with curved jaws can be used in order to access the connector.Installing a stop between the jaws in order to prevent excessive pressure is recommended. Note the location of the pliers on the connector body when disconnecting and connecting the harness. The stop pin in the pliers will prevent crushing the connector and reduce the chance for damage to wiring.
Illustration 2 g03715990
(2) 11mm Opening Minimum (3) 9.5mm Diameter Stop (4) Removal With Pliers (5) Installation With Pliers (6) 279 mm (11 inch) Pliers With 45 Degree Offset