Troy-Bilt TB490BC Operator's Manual page 29

ENGINE PARTS - MODEL TB490BC
4-CYCLE GAS TRIMMER
(ppn - 41ADT49C063) (Serial Number 011 ...... and greater)
!_m Part_Lo_
1 79!-182338
2 791-182339
3 791-!8!925
4 791-!82098
5 791-182099
8 791-182340
7 791-182101
8 791-182100
9 791-!82341
10 791-182103
11 791-181038
12 791-182102
13 791-181033
14 791-182700
15 791-182344
16 791-182345
17 791-182749
18 791-181034
19 791-182347
20 791-182348
21 791-182732
22A 791-182654
22B 753-1225
23 791-181751
24 753-1227
25 791-182097
26 791-181750
27 791-181757
28 753-1228
29 753-1229
30 791-182352
31 791-182353
32 791-181080
33 791-182354
34 753-1230
35 791-182356
36A 753-1234
36B 753-1231
37 791-182358
38 791-181045
39 791-182359
40 791-180890
41 791-181845
42 791-181046
43 791-182360
44 791-182361
45 791-182362
46 791-182804
Engine Cover
Engine Cover Screws
Valve Cover Screw
Valve Cover
Valve Cover Gasket
Rocker Adjustment Nut
Rocker Arm Pivot
Rocker Arm
Rocker Arm Stud
Valve Spring Retainer
Valve Spring
Push Rod Guide
Push Rod
Cylinder Head (includes 9 & 12)
Cylinder Screw
intake Baffle
Carburetor Mount Gasket
Nut
Carburetor Mount (includes t8)
Carburetor Mount Screw
Carburetor Gasket
Carburetor with Primer
Carburetor with Primer
O-Ring, Carburetor
Air Filter/Choke Cover Assembly
(includes 27 & 28)
Breather Tube
Air Filter Mounting Screw
Air Filter
Air Filter Cover
FueI Cap
Fuel Return Line
FueI Pick-Up Line with Filter
Screw
Washer
Fuel Tank Assembly (includes 29-31)
Fuel Tank Shield
Throttle Cable
Throttle Cable
Muffler Baffle
Muffler Gasket
Muffler (includes 40, 42-44)
Spark Arrestor Screen
Screen Cover
Screw
Muffler Shield
Muffler Mounting Screw
Muffler Cover
Switch Wire Assembly
IJ,_m _:t _L_.
47 791-18t247 Painut
48 753-1199 Recoil Pulley
49 791-613102 Recoil Spring
50 791-182366 Nut Clip
51 791-181079 Pull Handle
52 791-611061 Rope Guide
53 791-613103 Rope
54 791-181020 Starter Housing Screw
55 753-1237 Starter Housing Assembly
(includes 49-56)
55 791-182368 Clutch Washer
57 753-1238 C_utch with Spacer
58 791-153592 Clutch Drum
59 753-1239 Clutch Cover
60 791-145569 Anti-Rotation Screw
61 753-1240 Screw
82 753-1241 Nut
63 791-181345 Clutch Cover Screw
64 79!-182725 Ignition Module with Screws
65 791-181065 Spacer
66 791-181867 Flywheel
67 791-182743 Shroud Assembly with Screws
68 753-1244 Crankcase Assembly
(includes 69-73)
69 791-610309 Oil Seal
70 791-!82372 Bearing
71 791-182380 Crankshaff
72 791-182375 90 ° EIbow
73 791-182379 Breather Hose
74 791-181015 Cam Gear
75 753-1242 Cam Fo!_ower Set
76 791-181013 Cam Bracket
77 791-181012 Cam Bracket Screw
78 791-181040 Valves, Intake and Exhaust
79 791-182374 Cylinder Gasket
80 791-181018 Oi_ Pan Gasket
81 791-182377 Oil Pan (incIudes 80 & 82)
82 791-181020 Oil Pan Screw
83 791-182378 Dipstick Assembly (includes 84)
84 791-182290 O-Ring
85 791-181009 Connecting Rod
86 791-181008 Wdst Pin Bu_on
87 753-1243 Piston
88 791-181006 Wnst Pin
89 791-182295 Piston Ring Set
90 791-182409 Washer
91 791-181851 Screw
92 791-612468 Compression Spnng
93 791 -I 82537 Grommet
791-180852B Spark P_ug
753-1245 Short Block Assembly
(includes 3-7, 68-89)
791-182745 Cylinder Assembly
(includes 9, 12, 14 & 79)
791-180142 Starter Pawl Repair Kit
791-182156 Carburetor Repair Kit
753-1248 Gasket Diaphragm Repair Kit
Parts not shown
Reissued 12/01 29