Milwaukee 7140-21 Guide

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1
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3
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6
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8
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14
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18
19
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24 25
26
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49
36
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51
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61
69
84
35
83
64
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65
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70
66
SPECIFY CATALOG NO. AND SERIAL NO. WHEN ORDERING PARTS
ANGLED FINISH NAILER
CATALOG NO. 7140-21
MILWAUKEE ELECTRIC TOOL CORPORATION
13135 W. Lisbon Road, Brookfield, WI 53005
Drwg. 3
54-43-0040
SERVICE PARTS LIST BULLETIN NO.
0
00 EXAMPLE:
Component
Parts (Small #)
Are Included
When Ordering
The Assembly
(Large #).
PAGE 1 OF 2
FIG. PART NO. DESCRIPTION OF PART NO. REQ.
A88A
REVISED BULLETIN DATE
Jan. 2009
WIRING INSTRUCTION
STARTING
SERIAL NUMBER
1 05-84-0805 Deflector Bolt 1
2 45-88-1720 Deflector Pad 1
3 31-05-0400 Deflector 1
4 43-31-0355 Muffler 1
5 05-84-0845 Bolt Assembly 4
6 42-92-1435 Top Cap 1
7 45-06-0920 Seal 1
8 40-50-3120 Upper Valve Spring 1
9 34-40-3195 O-Ring 1
10 34-40-3245 O-Ring 1
11 44-62-0265 Head Valve Piston 1
12 42-76-0815 Valve Collar 1
13 45-06-0950 Seal 1
14 44-90-0700 Press Ring 1
15 34-40-3180 O-Ring 1
16 44-90-0730 Piston Ring 1
17 43-12-0270 Driver Assembly 1
18 34-40-3200 O-Ring 1
19 42-98-0370 Cylinder 1
20 44-90-0805 Cylinder Spacer 1
21 42-38-0315 Bumper 1
22 43-56-0900 Driver Guide 1
23 45-36-1655 Cylinder Spacer 1
24 34-40-3135 O-Ring 1
25 34-40-3295 O-Ring 1
26 34-40-3300 O-Ring 1
27 42-52-0410 Plunger Cap 1
28 44-70-0250 Valve Plunger 1
29 34-40-3285 O-Ring 1
30 34-40-3280 O-Ring 1
31 40-50-3195 Spring 1
32 44-70-0255 Plunger 1
33 34-40-3290 O-Ring 1
34 43-64-0150 Trigger Valve Head 1
35 06-65-1465 Spring Pin 1
36 06-65-1420 Spring Pin 2
37 06-65-1440 Spring Pin 3
38 44-10-0650 Selector 1
39 44-86-0710 Retainer 1
40 31-92-0200 Trigger Assembly 1
41 40-50-3160 Spring 1
42 40-50-3095 Selector Spring 1
43 44-90-0825 Ring 1
44 28-50-0815 Tool Body 1
45 43-44-1255 Gasket 1
46 42-92-1365 End Cap 1
47 05-84-0830 Bolt Assembly 1
48 05-83-0525 Round Head Phillips Bolt 2
49 42-38-0380 Bumper Band 1
50 42-70-0400 Spring Retainer (Belt Clip) 1
51 45-08-0460 Positioning Shaft 1
52 40-50-3185 Positioning Spring 1
53 05-84-0950 Socket Hex Head Screw 1
54 43-31-0370 Filter 1
55 44-90-0785 Snap Ring 1
61 43-56-0880 Work Contact Element Guide 1
62 42-36-2030 Work Contact BracketA 1
64 40-50-3065 Adjustment Spring 1
65 44-90-0710 Ring 1
66 44-94-0560 Adjustment Rod Assembly 1
67 43-98-0760 Adjustment Knob 1
68 44-90-0790 Ring 1
69 42-36-2015 Work Contact Bracket B 1
70 42-38-0325 No-Mar Pad 1
83 05-59-2025 Lock Nut 1
93 31-94-0110 Trigger Valve Assembly 1
93 25 26 27 28 20 30
31 32 33 34 35 43
FIG. PART NO. DESCRIPTION OF PART NO. REQ.
(See page 2)

77
60
72 78
79
58
74
59
63
91
36
56
57
75
81
76
82
71
92
92
80
89
90
73
83
83
84
85
86
87
88
56 44-66-1300 Back Plate 1
57 42-92-1400 Driver Guide Cover B 1
58 05-84-0860 Bolt Assembly 2
59 44-60-1870 Fixed Pin 1
60 42-92-1385 Driver Guide Cover A 1
63 42-92-1455 Protecting Hood Cover 1
71 06-65-1460 Spring Pin 1
72 05-84-0970 Socket Hex Head Screw 1
73 44-20-0850 Lock Handle Assembly 1
74 43-40-0475 Magazine A 1
75 05-84-0900 Socket Hex Head Screw 2
76 44-81-0060 Steel Channel 1
77 43-40-0490 Magazine B 1
78 44-66-1315 Nail Stop Plate 1
79 42-92-1490 Protecting Hood Cover 1
80 43-72-0360 Pusher 1
81 40-50-3000 Spring Assembly 1
82 40-50-3170 Pusher Spring 1
83 05-59-2025 Lock Nut 2
84 05-84-0910 Socket Hex Head Screw 1
85 45-88-1705 Pusher Cushion 1
86 44-66-1340 Positional Plate 1
87 40-50-3025 Positioning Spring 1
88 45-88-1730 Flat Washer 1
89 42-28-0365 Anchor Block 1
90 05-83-0540 Philips Screw 1
91 05-78-0805 Tap Bolt 3
92 05-84-0965 Socket Head Hex Bolt 2
94 45-24-0025 Magazine Pusher Assembly 1
100 12-98-0315 Service Nameplate 1
102 10-20-3310 Warning Label 1
14-70-0170 Overhaul Kit (Not Shown)
14-70-0175 Driver Maintenance Kit (Not Shown)
94 79 80 81 82
89 90 36
FIG. PART NO. DESCRIPTION OF PART NO. REQ. FIG. PART NO. DESCRIPTION OF PART NO. REQ.
100
102
0
00 EXAMPLE:
Component
Parts (Small #)
Are Included
When Ordering
The Assembly
(Large #).

PAGE 2 OF 2
BULLETIN NO. 54-43-0040 Jan. 2009
Disassembly:
1, 2, 3, 4, 6 Using a 4 mm hex key, remove hex bolt (1), deflector (3), muffler (4), and deflector pad (2) from top cap (6).
5, 6 Using a 4 mm hex key, remove hex bolts (5) to remove top cap (6).
8, 9, 10, 11, 12, 13 Remove valve assembly (8, 9, 10, 11, 12, and 13) out of the top cap using a 1/8 in. (3.18 mm) punch. Gently push punch
through several different holes in the top of the cap to remove assembly evenly.
14, 19 Remove press ring (14) from the top of cylinder (19) before removing cylinder assembly.
15, 16, 17, 18, 19, 20,
21, 23, 24, 44 Remove driver assembly (15, 16, 17), and cylinder assembly (18, 19, 20, 21, 23, 24) from tool body (44) at the same time by placing two flat blade screwdrivers under top ring of cylinder (19), 180° apart, and gently prying the cylinder from the tool
body.
18, 19, 20, 23 Remove cylinder ring (20) from cylinder (19) before removing cylinder spacer assembly (18, 23).
44, 56 74, 77 84 92 Remove magazine assembly (74 and 77) by removing screw (84) from tool body (44) and two screws (92) from magazine/
driver guide (56).
36, 37, 38, 39, 40, 41,
42, 43, 44, 93 Remove trigger valve assembly (93) from tool body (44) by placing a 3/32 in. (2.5 mm) punch inside half moon slot of retainer (39) and gently tapping shaft of selector (38).Remove spring (42), retainer (39) and ring (43). Remove spring, (41) and trigger
(40) from tool body and push pins (36), and 37) out of tool body (44) just far enough to remove valve assembly. Trigger
valve assembly (93) can be gently pushed out of the tool body from the inside handle area of the tool body using a flat blade
screwdriver.
Reassembly:
36, 37, 44, 93 Reinstall trigger valve assembly (93) into tool body (44) by aligning the grooves in the valve assembly with the two holes for
spring pins (36 and 37). Drive spring pins into tool body until they are flush with the casting surface.
38, 39, 40, 41, 42,
43, 44 Reinstall selection lever assembly (38, 42, 39, 43,) and trigger assembly (40 and 41) by doing the following. • Place spring (42) onto shaft of selection lever (38).
• Position spring (41) and trigger (40) over plunger of trigger valve assembly (93).
• Insert selection lever assembly (38 and 42) into tool body (44) and align half-moon slot of retainer (39) with half-moon
shaft of selection lever (38) and snap retainer assembly (39 and 43) onto the shaft.
17, 22, 44 Install flat side of driver guide (22) towards front of tool body (44).
Note: Center opening of driver guide (22) has a flat side and one with a slight offset to accommodate / help align blade of driver
assembly (17) in the assembly
19, 20, 23, 24 Reinstall cylinder ring (20) onto cylinder (19) only after O-ring (24), and cylinder ring (23) have been installed.
Note: Large flanged end of cylinder ring (20) must facing the top of cylinder (19) when installed.
15, 16, 17, 18, 19, 20,
21, 22, 23, 44 Assemble driver assembly (15, 16, and 17) and install it into cylinder assembly (18, 19, 20, 21, and 23). Install assembled components into tool body (44).
Note: Orientation of driver assembly (17) must match orientation of driver guide (22).
6, 14, 19 Reinstall press ring (14) onto top of cylinder (19) with wide edge facing toward top cap (6).
6, 49 Reinstall bumper band (49) into slot on top cap (6).
6, 8, 9, 10, 11, 12, 13 Reinstall spring (8) into internal bore of top cap (6) and snap preassembled head valve assembly (9-13) into top cap.
5, 6, 44 Reinstall top cap assembly (6) onto tool body (44) using hex bolts (5).
Note: To properly seat top cap, tighten the screws at alternating corners a few turns at a time until all screws are secure.
44, 56, 74, 76, 77,
84, 92 Reinstall magazine assembly (74 and 77) onto tool body (44) by securing screw (84) and two screws (92) into magazine/driver guide (56).
Note: Before completely securing screws (93) make sure magazine channel (76) is aligned properly at the front and rear of
the magazine assembly.
46, 54 Install smooth side of filter (54) toward end cap (46).
Apply Blue Loctite®242 to fasteners (1), (5), (47) (58), (72) and (92), if removed during disassembly.

Lubrication:
Type 'I' Grease 49-08-7100
Clean all parts with a dry clean cloth.
6, 8. 9, 10, 11,
12, 13 Place a thin coating of grease into internal bore of top cap (6), coat parts (8-13) and reassemble in order shown.
15, 16, 17 Coat o-ring (15) and piston ring (16) prior to installing into groove of driver assembly (17).
18, 20, 23, 24 Coat o-ring (24), cylinder spacer (23), o-ring (18) and cylinder ring (20) prior to installing onto cylinder (19).
25, 26 27, 28, 29, 30,
31, 32, 33, 34, 35 Coat all parts of the trigger valve assembly (25-35) if being replaced individually. Components cleaned in any type of solvent or water solution will require new lubrication.
Note: A new trigger valve assembly will be pre-lubricated and will not require any additional lubrication.