MTD TB490BC manual 3

BOOM AND TRIMMER PARTS - MODEL TB490BC 4-CYCLE GAS TRIMMER

(ppn - 41ADT49C063) (Serial Number 011...... and greater)

		5					1				46
							10	9		45	47
								8			27
									27
							12
											43
							13	11	28
											48
									44
	1									49	30
					6
		2	3	4				19
						14
Item	Part No.	Description			7			20
									21
						15
1	791-00040	Throttle Housing and Trigger
											26
		Assembly (includes 2-4)				16
2	791-00041	Throttle Trigger Lock-Out
3	791-00042	Throttle Trigger				17		18
4	791-182690	Throttle Trigger Spring
									23
5	791-182673	Switch Assembly					22			25
6	791-610327	Harness Clip								24
7	753-1247	Upper Drive Shaft Housing Assembly
8	791-181099	J-Handle Assembly (includes 9 & 10)
9	791-612831	Grip						31
10	791-612021	Tube Closure						27
11	791-683295	Handle Bracket Assembly (includes 12-17)
								33			26
12	791-181811	Screw
13	791-181812	Upper Handle Clamp
14	791-181813	Middle Handle Clamp					32
15	791-181814	Lower Handle Clamp							28
16	791-181815	Nut
											29
17	791-145569	Anti-Rotation Screw
18	753-1190	Click-Link Coupler (includes 18-22)
19	791-182057	Screw
20	791-181617	Bolt						33
21	791-181981	Adjustment Knob
22	791-181886	Knob Retaining Nut
23	791-182541	Lower Drive Shaft Housing Assembly						41
24	791-613300	Lower Flexible Drive Shaft									27
25	791-182200	Shield Mount Screw Assembly
26	791-182193	2 piece Gearbox Assembly									30
		(includes 25, 27	&	28)
27	791-182195	Gearbox Screw
28	791-145569	Anti-Rotation Screw									34
29	791-147492	Blade Shield/Shield Mount
30	791-182196	Blade Driver						34
31	791-683304	Shield Mounting Screw						42			35
32	753-1191	Shield and Blade Assembly (includes 33)
33	791-682061	Blade Assembly
34	791-147490	Retaining Washer				2 Piece Gearbox Assembly Parts – Item 26
35	791-612483	Spool Shaft				43	791-182191	Left Housing			36
36	791-683301	Outer Spool and				44	791-182192	Right Housing
		Eyelet Assembly				45	791-182194	Pinion Gear Assembly
37	791-612026	Retainer				46	791-182199	Output Shaft Bushing
38	791-610636B	Spring				47	791-182198	Output Shaft Gear
39	791-147495	Inner Reel				48	791-182197	Output Shaft Assembly			37
40	791-180814B	Bump Head Knob Assembly						(includes 46 & 47)			38
41	791-145873B	4-Tooth Blade				49	753-1159	O-Ring
42	791-181699	Nut				Optional Accessories
*	791-180014B	Blade Retaining Kit									39
		(includes 34 & 42)				*	753-1160	Reel and Line Assembly
*	791-613226	Locking Rod Tool				*	753-1161	Bump Head Assembly
*	791-682075B	πShoulder Harness						(includes 35-40)
						*	753-1249	4-Cycle Oil
						*	Items Not Shown				40

Reissued 12/01