Caterpillar 4900056 Alternator Assembly

This 12V 65A charging alternator serves as a direct replacement for Caterpillar OEM part numbers 4900056 and 490-0056. It is designed for integration with Caterpillar C1.7 and C2.2 industrial engines, including the XQ35 generator set variant. The unit supports the electrical charging requirements of Caterpillar skid steer loaders (226D, 226D3, 232D, 232D3, 239D, 239D3, 249D, 249D3) and paving compactors (CC2.6, CB2.5, CB2.7, CB2.9). The alternator features a clockwise rotation, internal regulator, and standard J-180 mount configuration compatible with the target engine accessory drive. It meets OEM specifications for output voltage regulation and thermal durability in high-vibration construction environments. Cross-references include Denso 1022118180, Lucas TPN771, and Caterpillar 3943496.