Alternator with Vacuum Pump, 50 Amp, Internal Regulator, Negative Polarity Key benefits Provides a reliable 50 amp charging source for vehicles and equipment that require a combined alternator and vacuum pump, eliminating the need for a separate vacuum unit. Integrated internal regulator simplifies installation and reduces the number of external components and connections. External fan and clockwise rotation support stable cooling and predictable installation orientation in compatible systems. Negative polarity design ensures compatibility with negative ground electrical systems common in most vehicles and equipment. English documentation included to support correct installation and troubleshooting. Main features Item: Alternator Includes vacuum pump Amperage: 50 A Fan: External Regulator: Internal Polarity: Negative Rotation: Clockwise Documentation language: English Compatibility and cross reference Part numbers: LR250511, LR250510C, LR250510, LR250517, LR250508B, LR250510B, LR250510B, LR250510, LR250517, LR250508B, 8971701602, 8971443921, 8971701631, 97144, 97170, 680175634240, LR250510C, LR250511 Use the listed part numbers to confirm fitment with your vehicle or equipment electrical system and mounting configuration. Performance and practical details Designed to deliver consistent 50 amp output for charging batteries and powering electrical accessories while also supplying vacuum for brake boosters or other vacuumoperated components. External cooling fan aids heat dissipation during sustained electrical loads, helping maintain performance over extended operating periods. Clockwise rotation and negative polarity must match the application requirements for proper function and longevity. Typical use scenarios Replacement alternator and vacuum pump assembly for commercial vehicles or heavy equipment that list any of the reference part numbers above. Retrofit or of an agricultural or construction machine where a single integrated unit is preferred to simplify installation and service. Fleet maintenance application where matching part numbers and consistent output characteristics reduce downtime and parts complexity. Installation notes Verify that the vehicle or equipment uses negative ground and requires clockwise rotation before installation. Confirm physical mounting points and electrical connectors match the application using the provided part numbers. Follow the included English documentation for wiring, torque specifications, and vacuum pump connections. This alternator assembly is intended for direct replacement where the listed part numbers and the specifications above match the application. Verify compatibility prior to to ensure correct fit and function.