Milwaukee M12 FUEL 3/8" Extended High Speed Ratchet

Service Parts List & Bulletin 54-47-0435

Catalog No.: 2569-20

Serial No.: N28A

Revised Bulletin: Sep. 2024

Wiring Instruction: See Pages 2 and 3

Example: Component Parts (Small #) Are Included When Ordering Assy. (Large #).

Parts List:

FIG.	PART NO.	DESCRIPTION OF PART	NO. REQ.
1a		3/8" Anvil	(1)
1b		Friction Plate	(1)
1c		Retaining Ring	(1)
2	45-98-0020	Yoke (for 3/8" ratchet)	(1)
3	42-40-0017	Bushing (for 3/8" ratchet)	(1)
4	36-17-0015	Crank Shaft (for 3/8" ratchet)	(1)
6	44-60-0890	Drive Pin	(1)
7	28-23-1010	Carrier	(1)
8	32-62-0085	Planet Gear (for 3/8" ratchet)	(3)
9	32-64-0130	Ring Gear (for 3/8" ratchet)	(1)
10	05-90-0230	Washer	(1)
13	44-66-1006	Motor Plate	(1)
14	05-84-0205	M2.5 Screw	(3)
15	06-82-2310	M3 x 8mm Pan Hd. T-10 Screw	(1)
16	05-81-0594	M4 Flat Hd. T-20 Screw	(4)
17	12-20-0461	Service Nameplate	(1)
18	05-71-0017	M4 x 10mm Pan Hd. T-20 Screw	(5)
19		Housing Cover - Right Housing Halve	(1)
20		Housing Support - Left Housing Halve	(1)
21	44-60-0575	Rivet Pin	(1)
22	42-42-0119	Switch Lock-Out	(1)
23	10-20-7229	Fuel Gauge Label	(1)
24	44-10-0740	Switch Paddle	(1)
25	42-55-2559	Zippered Tool Case	(1)
26	49-16-2569	Rubber Boot (Optional, Acc) (Not Shown)	(1)
28	42-06-0147	3/8" Anvil Service Kit	(1)
102	14-30-0445	3/8" Yoke / Beam / Gearcase Service Assy	(1)
103	16-01-2560	Rotor Service Assembly (for 3/8" ratchet)	(1)
104	14-20-2561	Electronics Service Assembly	(1)
105	14-38-0505	Housing Service Kit	(1)
106	28-23-2500	Gear Set Service Kit	(1)

Notes:

FIG. 17, 19: Prior to installing a new service nameplate, apply isopropyl alcohol to the handle cover with a clean, lint-free applicator and allow to dry.
FIG. 21: Use a thin blunt punch with the same OD or a similar tool like a finishing nail with the same OD and the pointed tip ground down to remove the spring pin from the handle halves and switch paddle. As an aid, prop up that corner end of the ratchet to support the tapping out of the spring pin. When reinstalling the pin, align the holes and carefully press or tap the pin in place.

Assembly and Service Instructions:

Replacing the Electronics Assembly (104):

Remove five T-10 handle screws (18) from the right handle halve (19) and two T-10 handle/gear case screws (16) from the right handle halve.
Gently turn the tool over and remove two T-10 handle/gear case screws (16) from the left handle halve.
Carefully remove the left handle halve to expose the electronics assembly.
Use a hex key to remove the three socket head screws (14) and slide the stator/rotor/motor mount plate out of the yoke housing assembly.
Place the electronics assembly into the housing support. Install the LED lens as shown.
Place the HV wire into the wire trap.
Assemble the control board into the housing slot.
Assemble the on-off switch into the housing cavity.
Place the battery terminal block into the housing cavity.
Install the switch lock-out slide.
Push all wires down into housing cavities as shown. Ensure all components are firmly and squarely in place.
Install the yoke assembly onto the housing support/electronics assembly.
Prior to installing the housing cover onto the housing support, ensure there are no interferences.

Screw Torque Specifications:

FIG.	PART NO.	WHERE USED	SEAT TORQUE (kgf-cm)	SEAT TORQUE (lb-in)
14	05-84-0205	Motor Plate	5-7	4-6
15	06-82-2310	Electronics Assy.	12-14	10-12
16	-------	Housing Halves	17-21	15-18
18	-------	Housing Halves	10-12	9-10

Lubrication Instructions:

Use DECH 5166 Grease (No. 49-08-0018) or DECH 5157 Grease (No. 49-08-0016).

Note: When servicing, remove 90-95% of the existing grease prior to installing new grease. Clean gear assemblies with a clean, dry cloth. Apply a liberal amount of grease to all indicated areas. Ensure all gear teeth, the inside diameter gear teeth of the ring gear, and the teeth of the motor pinion are completely coated. Internal components of the anvil assemblies should come from the factory pre-lubricated.

Internal view of the ratchet showing the placement of grease on various components like the anvil, gears, and yoke.

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