MODEL TB490BC
4-CYCLE GAS TRIMMER
Item
Part No.
Description
1
791-00040
Throttle Housing Assembly (includes 2-4)
2
791-00041
Throttle Trigger Lock-Out
3
791-00042
Throttle Trigger
4
791-182690
Throttle Trigger Spring
5
791-182405
Switch
6
791-610327
Harness Clip
7
753-04503
Upper Drive Shaft Housing Assembly
8
791-181099
J-Handle Assembly
9
791-683295
Handle Bracket Assembly (includes 10-15)
10
791-181811
Screw
11
791-181812
Upper Handle Clamp
12
791-181813
Middle Handle Clamp
13
791-181814
Lower Handle Clamp
14
791-181815
Nut
15
791-145569
Anti-Rotation Screw
16
753-1190
Split Boom Coupler (includes 17-20)
17
791-182057
Screw
18
791-181617
Bolt
19
791-181981
Adjustment Knob
20
753-04386
Knob Retaining Nut
21
791-182541
Lower Drive Shaft Housing Assembly
22
791-613300
Lower Flexible Drive Shaft
23
791-182200
Shield Mount Screw Assembly
24
791-182193
2 piece Gearbox Assembly (includes 25-35)
25
791-182195
Gearbox Mounting Hardware
26
791-145569
Anti-Rotation Screw
27
791-182192
Right Housing
28
791-182191
Left Housing
29
791-182194
Pinion Gear Assembly
30
791-182199
Output Shaft Bushing
31
791-182198
Output Shaft Gear
32
791-182197
Output Shaft Assembly (includes 30 & 31)
33
791-182196
Blade Driver
34
753-04348
Palnut
35
791-147490
Retaining Washer
36
791-147492
Blade Shield/Shield Mount
37
791-683304
Shield Mounting Screw
38
753-1191
Shield Assembly (includes 39)
39
791-682061
Blade Assembly
40
791-612483
Spool Shaft
41
791-683301
Outer Spool Assembly (includes 42)
42
791-612026
Retainer
43
791-610636B
Spring
44
791-147495
Inner Reel
45
791-180814B
Bump Head Knob Assembly
46
791-145873B
4-Tooth Blade
48
791-181699
Nut
*
791-180014B
Blade Retaining Kit (includes 34 & 43)
*
791-613226
Locking Rod Tool
*
791-682075B
Shoulder Harness
*
Items Not Shown
TB490BC PARTS LIST
5
1
6
3
4
2
7
1
10
11
12
13
14
15
20
39
38
39
46
35
48
30
29
8
25
26
9
27
34
17
18
19
26
16
21
23
22
37
25
26
35
31
25
28
32
33
24
29
23
40
41
42
43
44
45
E35