Part numbers: 1700100023, 1700100052, 1700100072 Overview Replacement ignition switch assembly compatible with Takeuchi excavators and applicable digging machines Fits models TB125, TB135, TB145, TB175, TB228, TB235, TB250 Key features and function 4-position ignition function including pre-glow, off, and start positions to match standard heavy machinery ignition controls 6-pin connector layout includes ACC, CB, BR, R1, R2 connectors for correct and stable electrical connections Direct-fit design for the listed models to simplify installation and reduce fitment issues Why customers need this product Restores standard ignition control when the switch is worn or malfunctioning Prevents electrical miswiring by using the specified connector layout, improving reliability during startup Helps reduce machine downtime by providing a straightforward replacement option compatible with multiple excavator models Benefits Compatibility: Designed to fit a range of excavator models for flexible inventory management Reliability: Connector layout matches OEM wiring conventions for stable electrical performance Ease of installation: Direct-fit replacement that aligns with standard ignition functions used in heavy equipment Typical applications Field: Replace a faulty ignition switch on site to service a machine quickly Maintenance: Stock as a common replacement part for routine servicing of the listed excavator models Refurbishment and resale: Install during machine refurbishment to ensure reliable starting and proper control functions Technical notes Part numbers provided for correct ordering and replacement identification Connector labels ACC, CB, BR, R1, R2 correspond to wiring terminals used on the compatible excavator models What it solves Eliminates intermittent starting problems caused by worn switches Removes uncertainty during wiring by matching the expected connector layout Streamlines parts selection for technicians servicing multiple compatible models Summary A practical, compatible ignition switch assembly for TB125, TB135, TB145, TB175, TB228, TB235, TB250 and other compatible digging machines that restores standard ignition functions and provides stable, correct electrical connections through a 6-pin connector layout.