milwaukee M18 FUEL 3/8 Friction Ring Controlled Torque Compact Impact Wrench User Manual

: June 17, 2024
: Milwaukee

Table of Contents

SERVICE PARTS LIST
SERVICE PARTS EXPLODED VIEW
LUBRICATION INSTRUCTIONS
GEARBOX SEALANT INSTRUCTIONS
WIRE ROUTING
Documents / Resources

BULLETIN NO.
54-26-3035

SERVICE PARTS LIST

SPECIFY CATALOG NO. AND SERIAL NO. WHEN ORDERING PARTS| REVISED BULLETIN| DATE Nov. 2023
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M18 FUEL™ 3/8″ Friction Ring Controlled Torque Compact Impact Wrench| WIRING INSTRUCTION See Pages 4 & 5
CATALOG NO. 3060-20| SERIAL NO. M88A

This product is to be serviced ONLY by personnel authorized by MILWAUKEE TOOL. Do NOT attempt to purchase parts and install them yourself. Installation by anyone other than an authorized MILWAUKEE personnel could void your warranty.
For service, parts, or inquiries, contact us:

Customer Service at 1.800.SAWDUST (1.800.729.3878)
E-Service tool repair at: 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. Send 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
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SERVICE PARTS EXPLODED VIEW

EXAMPLE:
Component Parts (Small #)
Are Included When Ordering
The Assembly (Large #).
![milwaukee M18 FUEL 3 8 Friction Ring Controlled Torque Compact Impact Wrench

SERVICE PARTS](https://manuals.plus/wp- content/uploads/2024/02/milwaukee-M18-FUEL-3-8-Friction-Ring-Controlled- Torque-Compact-Impact-Wrench-SERVICE-PARTS.png)

FIG.	PART NO.	DESCRIPTION OF PART	NO. REQ.
1	05-74-7130	M4 x 1.411 Pan Hd. T-20 ST Screw	(4)
15	44-90-1050	Friction Ring	(1)
16	34-40-1885	O-Ring	(1)
40	—————	Right Housing Halve-Cover	(1)
41	—————	Left Housing Halve-Support	(1)
42	06-82-6351	M3 x 1.058 Pan Hd. ST T-10 Screw	(9)
43	06-82-2367	M3 x 1.058 Pan Hd. ST T-10 Screw	(2)
44	22-09-0015	Coin Cell PCBA	(1)
45	—————	Coin Cell Battery	(1)
46	44-52-0006	Foam Pad	(1)
47	—————	Coin Cell Cover	(1)
48	—————	M2.6 PH ST Screw	(1)
52	45-24-9015	Forward/Reverse Shuttle	(1)
55	06-82-2500	6-32 x 7mm Pan Hd. Tapt. T-15 Screw	(1)
56	42-70-5151	Belt Clip	(1)
58	12/20/9880	Service Nameplate	(1)
59	—————	QR Code Label	(1)
107	14-20-9255	Electronics Assembly	(1)
110	16-01-6020	Rotor/Back Cap Assembly	(1)
112	45-24-2860	Speed Selector Assembly	(1)
113	42-70-0950	Belt Clip Kit	(1)
114	45-04-7015	Coin Cell Cover Screw Assembly	(1)
115	14-20-9185	Coin Cell PCBA Assembly	(1)
116	14-29-9010	Gearbox Assembly	(1)
119	14-34-7050	Handle Housing Kit	(1)
130	49-16-2858	Rubber Boot (Accessory)	(1)
131	48-53-3060	Blow Molded Carrying Case	(1)

SCREW TORQUE SPECIFICATIONS

FIG.| PART NO.| WHERE USED| SEAT TORQUE
(kgf-cm)| (lbs-in)
1| 05-88-1650| Gearcase Assy.| 30±2| 26±2
42| 06-82-6351| Right Housing Halve| 11±1| 10±1
42| 06-82-6351| Rotor/Back Cap Assy.| 8±2| 7±1
43| 06-82-2367| Right Housing Halve| 11±1| 10±1
48| ————–| Cell Cover Screw Assy.| 4±.5| 3±.4
55| 06-82-2500| Belt Clip| 16±2| 14±2

LUBRICATION INSTRUCTIONS

Use Type “J” Grease, No. 49-08-4220 (1-lb. tub)
NOTE: When servicing, clean the rotor surface with a dry cloth.
Apply a liberal amount of new grease to this part.

![milwaukee M18 FUEL 3 8 Friction Ring Controlled Torque Compact Impact Wrench

LUBRICATION](https://manuals.plus/wp- content/uploads/2024/02/milwaukee-M18-FUEL-3-8-Friction-Ring-Controlled- Torque-Compact-Impact-Wrench-LUBRICATION.png) Use Red Loctite 277, No. 44-22-0050
NOTE: Regarding parts to receive thread locking sealant:
Place 3-4 drops per screw of the recommended Loctite® thread locking sealant (or the equivalent) to the threads of parts shown prior to installation.

GEARBOX SEALANT INSTRUCTIONS

![milwaukee M18 FUEL 3 8 Friction Ring Controlled Torque Compact Impact Wrench

GEARBOX](https://manuals.plus/wp- content/uploads/2024/02/milwaukee-M18-FUEL-3-8-Friction-Ring-Controlled- Torque-Compact-Impact-Wrench-GEARBOX.png)

Use sealant Loctite SI 5900
Place sealant where connector wires attach to the gearbox assembly (in areas shown above).| Place a piece of tape over the sealant to prevent it from spreading over gearcase.| NOTE: Sealant height should not exceed the surface of the gearcase.

WIRE ROUTING

Place potting boat assembly in left handle halve.
Assemble the battery terminal block and mode selector into the corresponding cavities in handle halve.
Place high voltage ring terminal over the screw boss as shown. Route ground wire through the traps/channels in handle halves being sure wire is seated completely to the bottom.
Route wires from TRI-LED lighting assembly through wire traps on front gearcase. Secure the wires in place with a 1” strip of Kapton tape (or an equivalent).
Assemble gearcase assembly into handle halve. Be sure gearcase is seated firmly and squarely in handle.
Route wires from TRI-LED lighting assembly as shown, placing wires firmly down in traps.
Install stator to the rear of the handle halve. Place stator wires in handle halve cavity in the following order from bottom to top: gray, magenta, black. Be sure stator is firmly and squarely in handle cavity and that stator wires are pushed completely down below the top edge of handle. Join connector of shadowless lighting assembly with connector of potting boat assembly.
Install the on-off switch over the ground wire and into cavity in handle halve. Be sure on-off switch is seated firmly and squarely in position.Check that all electrical and mechanical components are properly in place in handle halve. Be sure there are no interferences creating pinched wires.
Install right handle halve (cover) over left handle halve (support). Check for the proper functionality of switch and shuttle. Secure handle halves together with five M3 x 16mm screws (42) and two M3 x 38mm screws (43). Carefully install rotor/back cap assembly into stator and onto the rear of tool (see illustration). Secure with four M3 x 16mm screws.

MILWAUKEE TOOL
www.milwaukeetool.com
13135 W. LISBON RD., BROOKFIELD, WI 53005
Drwg. 1

Documents / Resources

| milwaukee M18 FUEL 3/8 Friction Ring Controlled Torque Compact Impact Wrench [pdf] User Manual
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