milwaukee 3651-20 Compact Brushless Speed Impact Driver Instruction Manual

: June 13, 2024
: Milwaukee

Table of Contents

milwaukee 3651-20 Compact Brushless Speed Impact Driver
Product Information
Service Parts List
Overview
WIRING INSTRUCTIONS
References
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milwaukee 3651-20 Compact Brushless Speed Impact Driver

Product Information

Product Name: M18TM Compact Brushless 1/4 Hex
Impact Driver (3 Speed)

Catalog Number: 3651-20

Serial Number: N61A

Bulletin Number: 54-26-2885

Bulletin Date: June 2023

Service Parts List

Part No.	Description of Part	Quantity Required
05-92-1010	Retaining Ring	1
45-88-2026	Washer	1
40-50-0056	Spring	1

EXAMPLE:
Component Parts (Small #) Are Included When Ordering The Assembly (Large #).

Overview

milwaukee-3651-20-Compact-Brushless-Speed-Impact-Driver-
FIG-10

FIG. PART NO. DESCRIPTION OF PART NO. REQ.

1 05-92-1010 Retaining Ring (1)
2 45-88-2026 Washer (1)
3 40-50-0056 Spring (1)
4 42-76-0019 Sleeve (1)
5 45-88-1547 Washer (1)
6 ————— Front Gear Case (1)
7 ————— Steel Ball (2)
8 ————— Anvil (1)
9 ————— Gearbox Mechanism (1)
19 ————— Gearcase Endcap (1)
20 34-40-0304 O-Ring (1)
21 05-88-0106 M2 x .89 PT Screw (4)
24 ————— Stator (1)
29 ————— Belt Clip (1)
30 06-82-2500 6-32 x 5/16 Slt. Pan Hd. T-15 Mach. Sc. (1)
31 06-82-2367 M3 x 38mm Pan Hd. ST T-10 Screw (2)
32 06-82-6351 M3 x 16mm Pan Hd. ST T-10 Screw (7)
33 45-24-9030 Shuttle (1)
37 ————— Speed Selector Label (1)
38 ————— Spring Plate (1)
40 ————— Speed Selector Switch w/ Magnet Assembly (1)
41 ————— Handle Cover (1)
42 ————— Handle Support (1)
43 ————— Main PCBA (1)
44 12-20-9890 Service Nameplate (1)
45 42-55-2407 Contractor Bag (1)
48 14-34-6610 Handle Housing Service Kit (1)
49 14-30-6295 End Cap Service Kit (1)
50 42-70-0950 Belt Clip Kit (1)
51 14-29-9005 Gearcase/Anvil Service Kit (1)
53 14-20-9330 PCBA/Motor Stator Service Assembly (1)
54 14-34-6615 Gear Box Impacting Service Assembly (1)
55 14-46-9865 Rotor Service Assembly (1)
56 14-46-9870 Speed Selector Switch Service Kit (1)

LUBRICATION

Use Type ‘J’ Grease, No. 49-08-4220 (1 lb. can) Service grease may not be compatible with grease used during manufacturing. 90-95% of the old grease must be removed prior to any new grease being added.

8 Lightly coat front washer surface of anvil with grease, place a dab in the ball cavities of anvil.
51 Coat inside of bushing inside front gearcase with grease.
54 NOTE: Do not wash impact assembly. Use a clean, dry cloth to wipe away any excess grease or contamination.
54 Lightly coat the I.D. of the ring gear and the center of the planet gears of impacting assembly with grease.
55 Coat pinion of rotor assembly with grease.

WIRING INSTRUCTIONS

STEP 1: Place PCBA firmly and squarely in the cavities of left housing halve. milwaukee-3651-20-Compact-Brushless-Speed-Impact-Driver-
FIG-1

STEP 2: Carefully insert rotor into stator. Place rotor/stator in handle half at 15 degrees so rear rotor bearings fit into pocket and stator fits into grooves/ribs of left housing halve. Arrange wires as shown above.

STEP 3: Install LED lens into housing halve recess. Route light wire in traps as shown in image above, with black wire above white wire.

STEP 4: Assemble gear box/impact assembly onto rotor pinion. Be sure gear box, rotor and stator are firmly and squarely seated in left housing halve and that the rotor fan has movement.

STEP 5: Place on-off switch firmly and squarely in cavity of left housing half. Be sure ribbon wire is tucked in channel, and all previously placed wires are still captured in properly in wire traps and channels.

STEP 6: Install shuttle onto on-off switch being sure that top switch tab is captured in the bottom cavity of shuttle. Check for proper shuttle and switch functionality.

STEP 7: Place battery terminal block and hall sensor firmly and squarely into cavities of left housing halve. Be sure to capture hall sensor wires in trap as shown.

STEP 8: Install spring plate and speed selector slide into left housing halve.

STEP 9: Check that all elements of electronics assembly are seated properly and that all wires are pressed completely down in wire traps and channels. milwaukee-3651-20-Compact-Brushless-Speed-Impact-Driver-
FIG-9
Carefully install right housing halve-cover onto left housing halve-support. Watch for pinched wires. Secure with nine housing halve screws.Check the functionality of shuttle, on-off switch and speed selector slide before installing battery.