UNIVERSAL JOINT GP 1075006 - Caterpillar

3114 And 3116 Standby Generator Set EnginesCheck the battery charger connections on all 3114 and 3116 Standby Generator Set Engines. Illustration 1 shows the correct wiring for generator sets with Electronic Modular Control Panels (EMCP). Illustration 2 shows the correct wiring for generator sets with conventional control panels. Some generator sets may have the B+ and B- wires (050-271/150-271 and 051-270/151-270 respectively) reversed at the battery charger. Some generator sets may have the wiring (157-268 and 158-269) to the disconnect circuit terminals on the battery charger reversed, or those same wires may be reversed at terminals 1 and 2 on the starter motor magnetic switch (SMMS). The battery charger will not be damaged by incorrect wiring, but it will not function correctly.
On earlier diagrams provided with the generator sets, the wire connected to the B+ terminal of the battery charger was incorrectly identified as 151-271. The correct identification is 150-271.
Illustration 1. Correct battery charger schematic for 3114 and 3116 Standby Generator Set Engines with generators equipped EMCP.
Illustration 2. Correct battery charger schematic for 3114 and 3116 Standby Generator Set Engines with generators equipped with convention control panels.