ATG10553 Alternator for Medium & Heavy-Duty C50 3126 3116 87715398 87715398R 5264312 12715 The ATG10553 alternator is designed for use in medium and heavy-duty trucks equipped with engines such as the 3126, C50, and 3116.It serves as a direct replacement for OEM models 87715398, 87715398R, 5264312, and 12715, with interchange compatibility including ABO0366 and BAL9963S.Mounted on the engine, this 12-volt unit delivers a maximum output of 200 amps, supporting of electrical systems under conditions.Engineered for precise fitment, this alternator aligns with manufacturer specifications for the 3126 and similar engine platforms.It supports straightforward installation without the need for modifications, making it suitable for both replacement and upgrade applications.Equipped with an internal regulator and cooling fan, the unit ensures stable voltage output and efficient thermal management during continuous.Its construction supports in heavy-duty environments, maintaining consistent performance across extended service intervals.The compact and lightweight design facilitates integration into existing engine layouts, particularly when replacing older 3126 alternator units.