Manual
BOOM AND TRIMMER PARTS - MODEL
TB490BC
4-CYCLE GAS TRIMMER
1 791-00040
2 791-00041
3 791-00042
4 791-182690
5 791-182673
6 791-6!0327
7 753-1247
8 79!-!81099
9 791-612831
10 79t-612021
11 791-683296
12 791-181811
13 791-181812
14 791-181813
15 791-181814
16 791-181815
17 791-145569
18 753_1190
19 791-182057
20 791-181617
21 791-181981
22 791-181886
23 791-182541
24 791-613300
25 791-182200
26 791-182193
27 791-182195
28 791-145569
29 791-147492
30 791-182196
31 791-683304
32 753-1191
33 791-68206I
34 791-147490
35 791-612483
36 791-683301
37 791-612026
38 791-610636B
39 791-147495
40 791-180814B
41 791-145873B
42 791-181699
791-180014B
791-613226
791-682075B
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Descrij_tion
Throttle Housing and Tdgger
Assembly (includes 2-4) (_'
Throttle Trigger Lock-Out _Throttle Trigger
Throttle Trigger Spring
Switch Assembly
Harness Clip
Upper Drive Shaft Housing Assembly
J-Handle Assembly (includes 9 & 1(3)
Grip
Tube Closure
Handle Bracket Assembly (includes 12-!7)
Screw
Upper Handle Clamp
Middle Handle Clamp
Lower Handle Clamp
Nut
Anti-Rotation Screw
Click-Link Coupler (includes 18-22)
Screw
Bott
Adjustment Knob
Knob Retaining Nut
Lower Drive Shaft Housing Assembly
Lower Flexible Drive Shaft
Shield Mount Screw Assembly
2 piece Gearbox Assembly
(includes 25, 97 & 28)
Gearbox Screw
Anti-Rotation Screw
Blade Shield/Shield Mount
Blade Driver
Shield Mounting Screw
Shield and Blade Assembly (includes 33)
Blade Assembly
Retaining Washer
Spool Shaft
Outer Spool and
Eyelet Assembly
Retainer
Spring
Inner Reel
Bump Head Knob Assembly
4-Tooth Blade
Nut
Blade Retaining Kit
(includes 34 & 42)
Locking Rod Tool
_Shoulder Harness
@
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2 Pjec_e Gearbox Assembly Parts - IJLe_ _ __
43 791-182191 Left Housing _ _ )_
44 791-182192 Right Housing __
45 791-182194 Pinion Gear Assembty _ _
46 791-182199 Output Shaft Bushing
47 791-182198 Output Shaft Gear
46 791-182197 Output Shaft Assembly
(includes 46 & 47)
49 753-1159 O-Ring
_ptional Accessories
753-1160 Reel and Line Assembly
753-1161 Bump Head Assembly
(includes 35-40)
753_1249 4-Cycle Oil
Items Not Shown
30 Reissued 12/01