OEM Engine Assembly Sn Break From 3521 #12MJ - OEM Engine Service Part for Case Construction Equipment Repair To restore dependable equipment operation, this replacement part addresses repair of cooling, starting, charging, or engine-support systems affected by wear and service issues such as poor cooling, worn belts, weak charging, and engine-support component failure. Commonly sourced for alternator replacement, starter service, belt repair, and overheating-related maintenance needs on heavy equipment. More Details Part Number: 12MJ Application: Primary service use: Engine-support replacement component used to repair overheating, no-start conditions, charging issues, belt wear, or cooling-system service faults. Key Features: Designed to replace engine-related parts affected by wear, heat, or service failure Supports repair of overheating, belt slip, weak charging, and no-start issues OEM-style fit for efficient installation during engine service work Fits Case Models: Compatible with various Case construction equipment models - verify fitment before ordering Replaces: Refer to manufacturer cross-reference if applicable