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The DEWALT 5140139-18 is a rocker switch replacement part designed for use in DEWALT power tools. Rocker switches serve as the primary on/off control mechanism, interrupting or completing the circuit that powers the tool motor. This is an OEM replacement component sourced directly from DEWALT, making it a direct-fit option for the applicable tools in the DEWALT lineup. Installation is typically performed by qualified service technicians or experienced tradespeople comfortable with electrical component replacement in power tools.
This rocker switch is intended for use in compatible DEWALT power tools as a service replacement for a failed or damaged original switch. Power tool switches are subject to wear from repeated cycling and occasional debris ingestion, making them a common service item in shop and field settings. Technicians servicing DEWALT equipment will find this part useful for returning tools to full operational status rather than replacing the entire unit.
Designed as an OEM replacement rocker switch for compatible DEWALT power tools. Consult the DEWALT parts lookup or the tool service manual using part number 5140139-18 to confirm fitment for a specific model before ordering.
Switch replacement should be performed by a qualified power tool service technician. Disconnect the tool from all power sources, including unplugging from the outlet or removing the battery pack, before beginning disassembly. Refer to the tool service manual for disassembly sequence and fastener requirements. Verify switch orientation and wiring connections match the original configuration before reassembly.
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