Excavator C9.3B Ignition Switch 4678535 A directreplacement ignition switch designed for use with C9.3B engines. This switch restores reliable engine start and shutdown functions while matching the fit and electrical connections required for C9.3B installations. Key benefits Purposebuilt compatibility: Designed to fit C9.3B engines and their standard control panels, part number 4678535 simplifies sourcing and replacement. Reliable ignition control: Restores consistent start, run, and off functions to minimize equipment downtime during daily operations. Heavyduty construction: Built to withstand the vibration, dust, and continuous use common on construction sites and in earthmoving work. Easy installation: Straightforward wiring and a directfit design reduce labor time for operators and technicians during maintenance or replacement. Improves fleet uptime: Replacing a worn or faulty switch helps reduce nostart events and keeps machines available for scheduled work. Features and attributes Function: Controls engine ignition and key positions for start, run, and shutoff. Compatibility: Compatible with C9.3B engines and related control panel layouts; part number 4678535. Design: Compact directfit form factor intended for standard excavator dash openings to simplify installation. Durability: Constructed for heavyduty applications and prolonged work hours typical of excavation and construction environments. Performance: Engineered to provide consistent electrical contact and switch response under field conditions. Typical applications Field replacement during routine maintenance to restore reliable engine starting on excavators powered by C9.3B engines. Fleet servicing at construction sites or rental yards where fast, dependable ignition switch swaps reduce machine downtime. Onsite after switch failure to excavators to operation for earthmoving, trenching, and site preparation tasks. Compatibility note Part number 4678535 is specified for use with C9.3B engines. Verify panel opening and wiring compatibility with the equipment prior to installation to ensure a correct fit.