Product Description
**Milwaukee parts change not only by model# but also by serial number. To look up your tools parts break down on Milwaukee's website please click here:
Milwaukee PCBA and Terminal Block Kit
Model Number: 14-20-0578
The Milwaukee 14-20-0578 is a genuine OEM PCBA and Terminal Block Kit for the 2771-20 M18 Transfer Pump. The PCBA, or printed circuit board assembly, is the pump's main control unit: it houses the on-off switch, manages power delivery to the motor, connects to the battery terminal, and is protected by a fuse, making it the electronic brain that runs the tool. This kit supplies that control board together with the battery terminal block, the component that carries power from the M18 battery pack into the pump's electronics, so the two parts that make up the pump's power-and-control connection are replaced together as a matched unit. Because the PCBA and terminal block manage and carry the pump's electrical power, a failure here, whether a fried board, a blown circuit, a bad switch, or a damaged battery terminal, causes the pump to lose power, run intermittently, or stop working entirely. Replacing them with the correct genuine Milwaukee OEM kit restores proper power delivery and control to the transfer pump.
Because Milwaukee Tool specifies replacement parts by both catalog number and serial number, always verify your tool's serial number against the official Milwaukee service parts diagram before placing your order, since running production changes can alter part compatibility within the same catalog number. This PCBA and terminal block kit is specified for the 2771-20 M18 Transfer Pump, so confirm your tool's catalog and serial number against the parts diagram before ordering. Because this is an electronic assembly, replacing it involves opening the pump and working with the internal wiring; note or photograph the wiring connections and the routing before removing the old assembly, and route and connect the new PCBA and terminal block exactly as original, ensuring the fuse and switch connections are correct. Service should be performed by someone competent to work on power tool electronics following the tool's service procedure. The motor, switch button, switch linkage, fuse, and housing that work with the PCBA are separate parts, so refer to your tool's parts diagram for the correct companion part numbers.
Features
- Genuine Milwaukee OEM service part, not an aftermarket substitute
- PCBA and Terminal Block Kit for the 2771-20 M18 Transfer Pump
- PCBA is the pump's main control unit and houses the on-off switch
- Manages power delivery to the motor and connects to the battery terminal
- Protected by a fuse as part of the control circuit
- Includes the battery terminal block that carries power from the M18 pack
- Supplies the control board and terminal block as a matched kit
- Restores proper power delivery and control to the pump
- Corrects a pump that lost power, runs intermittently, or will not run
- Manufactured to Milwaukee specification for correct fit and function
- Electronic assembly, service by a competent servicer
- Verify catalog number and serial number before ordering
Specifications
- Manufacturer: Milwaukee Tool
- Part Number: 14-20-0578
- Official Description: PCBA + Terminal Block Kit
- Component Type: Control board (PCBA) and battery terminal block kit
- Contents: PCBA control board and battery terminal block
- Function: Controls the pump and carries battery power into the electronics
- Primary Fitment: 2771-20 M18 Transfer Pump
- Also Referenced On: Verify additional applications using Milwaukee's online parts lookup
- Parts Diagram Position: Figure 50 on the 2771-20 service parts list
- Quantity: Sold as a kit, (1) required per tool
- Part Type: Genuine Milwaukee OEM Replacement Part
Includes
- (1) Milwaukee 14-20-0578 PCBA and Terminal Block Kit
The motor, switch button, switch linkage, fuse, and housing that work with the PCBA are NOT included, vary by tool, and are sold separately - refer to your tool's parts diagram for the correct part numbers and quantities. Always verify by serial number using Milwaukee's online parts lookup before ordering.
