Milwaukee M18™ FUEL™ One-Key™ Hammer-Drill

Product Information & Service

This document provides a service parts list and assembly guidance for the Milwaukee M18™ FUEL™ One-Key™ Hammer-Drill (Catalog No. 2806-20).

Important Note on Repairs: Only maintenance, service, repairs, and replacements of parts as defined in the Operator's Manual can be performed by the user. All other repairs are to be performed ONLY by personnel authorized by MILWAUKEE TOOL. Attempting to install other parts could void your tool warranty.

For Service, Parts, or Inquiries:

• Customer Service: 1.800.SAWDUST (1.800.729.3878)
• E-Service Tool Repair: www.milwaukeetool.com/e-service
• Find a local authorized MILWAUKEE service location at milwaukeetool.com
• Find a MILWAUKEE factory Service Center Location or MILWAUKEE factory Central Repair Center at milwaukeetool.com.

When sending items for repair, please include the following, posted paid and insured:

• Your name, address, and phone number
• Description of the issues
• Copy of the proof of purchase
• Tool, charger, and batteries involved with the issues

MILWAUKEE Factory Central Repair Centers:

MILWAUKEE TOOL Central Repair
1401 Sycamore Avenue
Greenwood, MS 38930

MILWAUKEE TOOL Central Repair
2198 Southtech Drive
Greenwood, IN 46143

Milwaukee Tool | www.milwaukeetool.com | 13135 W. LISBON RD., BROOKFIELD, WI 53005

Product Illustration

Illustration of the Milwaukee M18 FUEL One-Key Hammer-Drill.

Exploded View and Parts List

Example: Component Parts (Small #) are included when ordering the Assembly (Large #).

Exploded view diagram of the Milwaukee M18 FUEL One-Key Hammer-Drill, showing all internal components with numerical callouts. The diagram illustrates the relationship between various parts such as the housing, motor, gearcase, chuck, and electronic components.

Parts List

Repair and Assembly Instructions

Removing the Chuck Screw

Set the Speed Selector Slide (39) to the #1 setting.

With the aid of a small pencil tip torch (or use an air reduction nozzle on a heat gun), apply heat into the chuck opening, directly to the head of the reversing screw just prior to removing it. Place a T40 1/4" Torx bit into the head of the reversing screw and place a 1/4" boxed end wrench over the hex on the T40 bit. It is recommended to use a 12"-18" metal tube or pipe as leverage over the boxed wrench. In a clockwise direction, apply slow, steady force on the 'cheater bar' to break the screw loose.

Removing the Keyless Chuck

Tighten a 3/8" or 10mm Allen Key into the jaws of the chuck. Place the tool into a vise with soft jaws (this requires removing the belt clip from the tool). It is recommended to use a 12"-18" metal tube or pipe as leverage over the Allen key. In a counter-clockwise direction, apply slow, steady force on the 'cheater bar' to break the chuck loose.

Installing New Chuck and Screw

Torque Chuck to 1095 kgf-cm (950.418 lb-in or 79.20 lb-ft).

Torque Screw to 400 kgf-cm (347 lb-in or 28.93 lb-ft).

Internal Assembly and Wiring Guidance

Ensure all mechanical and electrical components are placed firmly and squarely in the corresponding cavities of the left housing halve.

Be very careful to ensure all wires and the wire ribbon are placed firmly down in wire channels and traps.

Make sure there are no interferences when installing the right housing halve.

Wire Routing:

• Route the high voltage ground wire and terminal.
• Route the six wires close to the stator, then down into the housing halve cavity behind the on-off switch.
• Connect wires from the gearcase assembly with the corresponding wires of the potted circuit board. Tuck wires and connectors into the recess under the gearcase assembly, then down into the housing halve cavity behind the on-off switch.
• Ensure all wires in this area are pushed completely down into the handle cavity behind the switch. Prevent pinched wires here when putting the housing cover in place.
• Keep the blue wire away from the heat sink.

Component Identification:

• Heat Sink: Located within the tool housing.
• 3V Coin Cell Battery (CR 2032): Located on the circuit board.

Warning: Keep wires away from the heat sink.

ATTENTION: OBSERVE PRECAUTIONS FOR HANDLING ELECTROSTATIC SENSITIVE DEVICES.