2004/12/01 Caterpillar

Engine:

3512 (S/N: 24Z1-UP)

3516 (S/N: 25Z1-UP)

G3516 (S/N: 4EK1-UP)

When converting a 3500 Genset from a 480 Volt Sensing VR3 Regulator to a 240 Volt Sensing VR6 Regulator, use the wiring diagrams shown in Table 1.

For self-excited generators, 242-9702 Voltage Regulator Gp is the the Cancel Replace By (CRB) for 149-6131 Regulator .

For permanent magnet generators, 242-9703 Voltage Regulator Gp is the Cancel Replace By (CRB) for 155-3819 Voltage Regulator As .

For retrofit instructions, refer to Special Instruction, REHS2505, "VR6B Regulator Installation for 3500 Generator Sets".