MTD 450 Series Rear Tine Tiller Illustrated Parts Manual

Form No. 769-05488 (January 15, 2010)

Manufacturer: MTD LLC

Handle & Tine Shield

Exploded view diagram of the Handle & Tine Shield assembly. This section details components such as the upper and lower handle tubes, tine shield, various mounting brackets, screws, nuts, washers, grips, and adjustment mechanisms.

Ref.	Part Number	Description
1	747-1152	Shaft Rod
2	649-0034-0691	Lower Handle Tube Assembly-Black
	649-0034-0638	Lower Handle Tube Assembly-Red
3	649-0041-0691	Upper Handle Assembly-Black
	649-0041-0638	Upper Handle Assembly-Red
4	710-0946	Screw, 1/4-20 x 0.625
5	710-3005	Hex Head Screw, 3/8-16:1.25
6	710-3056	Hex Head Screw, 5/16-18 x 3.25
7	911-0415	Clevis Pin, .375 X 1.75
8	712-0324	Hexlock Nut, 1/4-20
9	712-0379	Flangelock Nut, 3/8-24
10	912-0429	Hexlock Nut, 5/16-18
11	714-0147	Cotter Pin, .125 X 1.75 INTERNAL
12	720-0210A	Small Tee Knob
13	720-0278A	Foam Grip, .970 x 11.0
14	720-0313	Grip, .1875 x 1.00
15	726-0273	Battery Clamp, 5/16
16	726-0317	Cable Tie, 8.5 LG
17	735-0246A	End Plug
18	936-0117	Washer, Flat, .385 x .620 x .033
19	736-0242	Washer, Bell, .340 x .872 x .060
20	736-3090	Washer, Flat, .260 x .720 x .060
21	938-0958	Spacer, Shoulder, .50 x .190 x .360 LG
22	747-1219-0637	Clutch Bail
23	784-0190	Handle Adjustment Crank
24	784-0191	Hex Nut Retainer Bracket
25	786-0120-0637	Tiller Depth Control
26	786-0181-0691	Shaft Rod Lever-Black
	786-0181-0638	Shaft Rod Lever-Red
27	735-0127	Washer, Rubber, .33 ID x .87 OD x .125
28	914-0104	Cotter Pin, .072 x 1.12 LG
29	686-0044B-0691	End Cover Assembly-Black
	686-0044B-0638	End Cover Assembly-Red
30	710-0176	Hex Head Screw, 5/16-18 x 2.75
31	710-3008	Hex Head Screw, 5/16-18 x .75
32	710-3022	Hex Head Screw, 3/8-16 x 2.75
33	710-04482	Hex Head Flange, 3/8-16 x .875
34	712-04063	Flangelock Nut, 5/16-18
35	712-04065	Flangelock Nut, 3/8-16
36	712-0421	Wing Nut, 5/16-18 W/ Bell Washer
37	926-0106	Speed Nut Cap, 1/4 ROD
38	736-0204	Washer, Flat, .344 x .62 x .033
39	938-0849	Screw, Hex, 5/16-18 x .75
40	747-0432	Tiller Flap Rod
41	750-0885A	Spacer, .322 x .625 x 2.00
42	786-0090A-0691	Side Shield-Black
	786-0090A-0638	Side Shield-Red
43	786-0113A-0691	Rear Tine Shield-Black
	786-0113A-0638	Rear Tine Shield-Red
44	786-0176-0691	RH Handle Mount Bracket-Black
	786-0176-0638	RH Handle Mount Bracket-Red
45	786-0177-0691	LH Handle Mount Bracket-Black
	786-0177-0638	LH Handle Mount Bracket-Red
46	786-0178A-0691	Tine Shield-Black
	786-0178A-0638	Tine Shield-Red
47	786-0179-0637	FRT Tine Shield Bracket
48	786-0180-0637	FRT Tine Shield Spacer Bracket
49	710-0382	Hex Head Screw, 1/2-13 x 5.00
	710-0506	Hex Head Screw, 1/2-13 x 5.50
50	912-0206	Hex Nut, 1/2-13
	712-3066	Hex Nut, 1/2-20
51	936-0921	Washer, Lock, 1/2
52	731-1595	Counterweight
53	936-0179	Washer, Flat, 1/2 x 1.25 x .100
54	710-0376	Hex Head Screw, 5/16-18 x 1.00
55	750-0194	Hub, .636 ID x 1.00 OD x .94

Drive System

Exploded view diagram of the Drive System. This section covers components like the belt cover, pulleys, belts, idler brackets, wheels, shaft covers, and associated fasteners and hardware.

Ref.	Part Number	Description
1	686-0111-0637	Belt Cover Bracket Assembly
2	710-1039	Hex Head Screw, 3/8-24 x 1.00
3	710-0237	Hex Head Screw, 5/16-24 x .625
4	710-0412	Hex Head Screw, 1/4-28 x .75
5	710-0502A	Screw, 3/8-16 x 1.250
6	710-0599	Screw, 1/4-20 x 0.500
7	710-3005	Hex Head Screw, 3/8-16 x 1.25
8	710-0805	Hex Head Screw, 5/16-18 x 1.50
9	712-0266A	Jamlock Nut, 3/8-16
10	912-3010	Hex Nut, 5/16-18
11	914-0104	Cotter Pin, .072 DIA. x 1.13 LG
12	936-0104	Washer, Lock, 5/16
13	936-0119	Washer, Lock, 5/16
14	936-0176	Washer, Flat, .265 x .938 x .120
15	736-0242	Washer, Bell, .340 x .872 x .060
16	936-0271	Washer, Spring, .317 x .625 x .020
17	936-0329	Washer, Lock, 1/4
18	936-0452	Washer, Bell, .396 x 1.140 x .095
19	938-0876	Shoulder Nut, 7/16-20
20	746-1117	Clutch Cable
21	747-1159	Idler Pulley Rod
22	954-0434	Belt, 4L x 58.16 LG
23	756-0405	Flat Idler Pulley w/ Flanges, 3.75 O.D.
24	756-0971	Engine Pulley, Inner Half
25	756-0972	Engine Pulley, Outer Half
26	756-1162	Input Pulley, 4L x 8.594
27	786-0064A	Idler Pulley Bracket
28	786-0185A-0637	Belt Keeper Bracket, B&S 6.5 HP
29	786-0187-0637	Shaft Cover Bracket
30	786-0193-0637	Idler Belt Keeper
31	686-0109A	Shaft Crank Assembly
32	710-0653	Screw, 1/4-20:0.375
33	710-1017	Screw, 1/4-14:0.625
34	712-0392	Lock Nut, Cap, 1/4-28
35	915-0120	Spiral Pin, 3/16 x 1.00
36	936-3020	Washer, Flat, .271x .630 x .065
37	784-0158A-0662	Belt Cover - Gray
	784-0158A-0691	Belt Cover - Black Jack
	784-0158A-0638	Belt Cover-Red
38	784-0208D-0638	Shaft Cover-Red
	784-0208D-0691	Shaft Cover-Black
39	934-04231	Wheel, 16 x 4.6 x 8
	934-04233	Wheel, 14 x 4.5 x 6
40	710-0606	Hex Head Screw, 1/4-20 x 1.50
41	712-04064	Flangelock Nut, 1/4-20
42	911-0415	Clevis Pin, .375 x 1.75
43	714-04043	Cotter Pin, Bow-Tie
44	986-04074A	Complete Gear Case Assembly
45	712-3054	Hexlock Nut, 3/8-24
46	936-0169	Washer, Lock, 3/8
47	936-0208	Washer, Flat, .51 x 1.5 x 0.07
48	936-0253	Washer, Bell, .525 x 1.00 x .050
49	938-0688	Screw, Shoulder, 3/8-24 x 1/2 x .325
50	938-0689	Screw, Shoulder, 3/8-24 x 1/2 x .180
51	742-0305A-0637	Articulating Tine
52	984-0160-0637	Tine Adaptor Assembly
53	731-07556	Cap

Transmission Assembly

Exploded view diagram of the Transmission Assembly. This section details internal components such as gears, shafts, bearings, seals, chains, sprockets, and housing parts, along with fasteners and washers.

Ref.	Part Number	Description
1	611-0021	Shaft Assembly, Tine, 18T
2	611-0128	Shaft Assembly, Jack
3	611-0129	Shaft Assembly, Shift Input
4	611-04074A	Shaft Assembly, Wheel, 33T
5	617-0058	Gear Assembly, 30T Reverse Idler
6	617-0059	Gear Assembly, 30T Tine Idler
7	617-0060	Sprocket Assembly, 9T Tine Input
8	617-0061	Sprocket Assembly, 10T Whl Input
9	617-0062	Gear Assembly, 11T
10	686-0108A-0637	RH Chain Case Housing Assembly
11	710-0376	Hex Head Screw, 5/16-18 x 1.00
12	710-0599	Screw, 1/4-20 x 0.500
13	710-0604A	Screw, :5/16-18 x 0.625
14	710-3008	Hex Head Screw, 5/16-18 x .75
15	711-1349	Input Shaft, .75
16	712-0378	Nut, Hex, 7/16-20
17	712-3004A	Nut, Flangelock, 5/16-18
18	913-0367	Endless Chain, #420 x 50 Links
19	913-0484	Endless Chain, #50 x 54 Links
20	716-0865	Snap Ring, .500
21	717-0853	Clutch Collar
22	717-1582	Gear Spur, 44T
23	717-1583	Gear Spur, 30T
24	717-1584	Gear Spur, 30T
25	717-1585	Gear Spur, 44T
26	717-1587	Gear Spur, 44T
27	717-1594	Gear Spur, 16T
28	921-0378	Shaft Seal, 1.0
29	721-0379	Shaft Seal, .75
30	786-0238	Positioner Gear Bracket
31	726-0277	Tapered Cap Plug
32	932-0496	Compression Spring, .230 OD
33	936-0163	Washer, Flat, 1.03 x 1.62 x .03
34	936-0171	Washer, Lock, 7/16
35	936-0226	Washer, Flat,.474 x .879 x .064
36	936-0351	Washer, Flat, .760 ID x 1.50 OD
37	736-0407	Washer, Bell,.45 x 1.00 x .062
38	736-0518	Washer, Thrust, .445 x 1.92 x .060
39	736-3088	Washer, Flat,1.595 x .635 x .062
40	686-04129-0637	LH Chain Case Housing
41	950-0671	Spacer, .75 x 2.0 x .50
42	738-0645	Shaft Detent, .5 DIA
43	738-0648	Shaft, Jack, .625 x 2.385
44	738-1013	Shaft, Jack, .6250 x 5.0050
45	941-0600	Ball Bearing, 17 x 40 x 12:6203
46	941-0420	Flange Bearing, 1.0 x 2.5 x 1.38
47	741-0421	Flange Bearing, .75 x 2.5 x 1.38
48	941-0563	Ball Bearing, 17 x 40 x 12:6203
49	741-0862	Ball, Detent, .250
50	750-0258	Spacer, .315 x .750 x .375 LG
51	950-0570	Spacer, 1.0 ID x 2.0 OD x.5 LG
52	750-0664	Spacer, .505 ID x .88 OD x .440

Engine Model - 170-V0A

Exploded view diagrams illustrating the components of the 170-V0A engine. This section includes detailed parts lists for the cylinder head, carburetor, fuel system, crankcase, flywheel, starter, and various internal and external engine components, fasteners, and gaskets. Parts without numeric call-outs are noted as not serviceable.

Ref.	Part Number	Description
1	710-04917	Bolt
2	951-11054A	Valve Cover
3	731-07059	Breather Hose
4	726-04101	Breather Hose Clamp
5	951-11565	Valve Cover Gasket
6	751-11124	Nut, Pivot Locking
7	751-11123	Valve Adjusting Nut
9	710-04902	Rocker Arm Stud
16	710-05100	Cylinder Head Bolt
18	951-10292	Spark Plug
19	710-04911	Muffler Stud
21	712-04214	Nut
22	951-11590	Muffler Assembly
23	710-05002	Bolt
24	710-05101	Carburetor Stud
25	751-11567	Carburetor Insulator Gasket
26	951-11568	Carburetor Insulator
27	951-11569	Carburetor Gasket
29	951-11571	Carburetor Gasket Plate
30	951-10806	Air Cleaner Housing
31	712-04213	Nut
32	951-11067	Throttle Control Knob
33	710-05102	Self-Tapping Bolt
39	951-11572	Cylinder Head Gasket
42	715-04090	Dowel Pin
45	951-11253	Piston Ring Set
49	710-04915	Bolt
50	951-11113	Air Shield
51	951-11573	Connecting Rod Assembly
52	951-11356	Governor Arm Shaft
53	736-04461	Governor Shaft O-Ring
54	951-11574	Governor Seal
55	714-04078	Cotter Pin
56	951-11575	Camshaft Assembly
57	951-11369	Radial Ball Bearing
59	951-10307	Flywheel Key
60	951-11576	Governor Assembly
61	715-04092	Dowel Pin, 7 x 14
62	715-04089	Dowel Pin, 9 x 14
63	951-11371	Crankcase Cover Gasket
65	710-04932	Bolt
66	951-11577	O-Ring
68	951-11578	Oil Seal
70	736-04440	Oil Drain Plug Washer
71	710-04906	Oil Drain Plug
73	951-10792	Ignition Coil
74	710-04919	Bolt
75	951-10805	Flywheel
76	951-10934	Cooling Fan
77	951-10911	Starter Cup
78	712-04209	Nut
81	951-11583	Blower Housing
82	736-04455	Washer
83	710-04914	Bolt
84	951-10790	Recoil Starter Assembly
85	951-11584	Primer Bracket
86	710-05103	Bolt
87	951-11585	Governor Spring
88	951-10664	Throttle Linkage Spring
89	951-10665	Throttle Linkage
90	951-11106	Governor Arm
91	712-04212	Nut
92	710-04908	Governor Arm Bolt
97	951-10662	Engine/Dipstick Cover
98	710-04905	Bolt
100	951-11380	O-Ring
101	951-10656	Dipstick Tube
106	951-10652	Fuel Filter
107	951-10796	Fuel Tank
109	710-04918	Bolt
110	951-11109	Blower Housing Shield
a	951-11177	Choke Control Lever
s	951-11589	Fuel Bowl Gasket
u	710-04904	Fuel Bowl Bolt Gasket
v	710-04945	Fuel Bowl Mounting Bolt
w	951-11349	Fuel Drain Plug Gasket
x	710-04903	Fuel Drain Bolt
--	951-10829	Spark Arrestor (Not Shown)
--	951-10651	Fuel Tank Nipple (Not Shown)
--	951-10798A	Short Block
5	951-11565	Valve Cover Gasket
20	--	Exhaust Pipe Gasket
25	751-11567	Carburetor Insulator Gasket
26	951-11568	Carburetor Insulator
29	951-11571	Carburetor Gasket Plate
39	951-11572	Cylinder Head Gasket
41	--	Valve Lifter
45	951-11253	Piston Ring Set
46	--	Piston Pin Clip
47	--	Piston
48	--	Piston Pin
51	951-11573	Connecting Rod Assembly
52	951-11356	Governor Arm Shaft
53	736-04461	Governor Shaft O-Ring
54	951-11574	Governor Seal
55	714-04078	Cotter Pin
56	951-11575	Camshaft Assembly
57	951-11369	Radial Ball Bearing
58	--	Crankshaft Assembly
60	951-11576	Governor Assembly
61	715-04092	Dowel Pin, 7 x 14
62	715-04089	Dowel Pin, 9 x 14
63	951-11371	Crankcase Cover Gasket
64	--	Crankcase Cover
65	710-04932	Bolt
66	951-11577	O-Ring
67	--	Oil Filler Plug
68	951-11578	Oil Seal
69	--	Crankcase Complete
70	736-04440	Oil Drain Plug Washer
71	710-04906	Oil Drain Plug
--	951-11587	Crankshaft Kit
57	951-11369	Radial Ball Bearing
58	--	Crankshaft Assembly
59	951-10307	Flywheel Key
63	951-11371	Crankcase Cover Gasket
68	951-11578	Oil Seal
--	951-11063A	Valve Cover Gasket Kit
2	951-11054A	Valve Cover
5	951-11565	Valve Cover Gasket
--	951-10799	Cylinder Head Assembly
5	951-11565	Valve Cover Gasket
7	751-11123	Valve Adjusting Nut
8	--	Rocker Arm
9	710-04902	Rocker Arm Stud
10	--	Push Rod Guide
11	--	Valve Spring Retainer-Intake
12	--	Exhaust Valve Adjustor
13	--	Valve Spring Retainer-Exhaust
14	--	Valve Spring
17	--	Cylinder Head
20	--	Exhaust Pipe Gasket
25	751-11567	Carburetor Insulator Gasket
26	951-11568	Carburetor Insulator
39	951-11572	Cylinder Head Gasket
42	715-04090	Dowel Pin
43	--	Exhaust Valve
44	--	Intake Valve
--	951-11586	Crankcase Cover Kit
57	951-11369	Radial Ball Bearing
63	951-11371	Crankcase Cover Gasket
64	--	Crankcase Cover
65	710-04932	Bolt
68	951-11578	Oil Seal
--	951-11588	Crankcase Kit
52	951-11356	Governor Arm Shaft
53	736-04461	Governor Shaft O-Ring
54	951-11574	Governor Seal
55	714-04078	Cotter Pin
57	951-11369	Radial Ball Bearing
68	951-11578	Oil Seal
--	951-10801A	Gasket Kit - External
20	--	Exhaust Pipe Gasket
25	751-11567	Carburetor Insulator Gasket
27	951-11569	Carburetor Gasket
66	951-11577	O-Ring
68	951-11578	Oil Seal
70	736-04440	Oil Drain Plug Washer
--	951-10818	Air Cleaner Housing Assembly
35	--	Lower Housing
38	--	Upper Housing
--	951-10647	Valve Kit
43	--	Exhaust Valve
44	--	Intake Valve
--	951-10655	Dipstick Assembly
102	--	Dipstick Gauge
103	--	Dipstick Cap
--	951-10669	Oil Fill Plug Assembly
66	951-11577	O-Ring
67	--	Oil Filler Plug
--	951-10650	Fuel Line Kit
94	--	Fuel Hose
95	--	Hose Clamp
--	951-10657	Muffler Stud Assembly
19	710-04911	Muffler Stud
--	951-10819	Cylinder Head Service Kit
5	951-11565	Valve Cover Gasket
15	--	Valve Seal
16	710-05100	Cylinder Head Bolt
39	951-11572	Cylinder Head Gasket
--	951-10794	Air Cleaner
36	--	Air Cleaner Foam Wrap
37	--	Air Cleaner Element
--	951-10802A	Gasket Kit - Complete
5	951-11565	Valve Cover Gasket
20	--	Exhaust Pipe Gasket
--	951-10800A	Carburetor Kit - Major
25	751-11567	Carburetor Insulator Gasket
26	951-11568	Carburetor Insulator
27	951-11569	Carburetor Gasket
29	951-11571	Carburetor Gasket Plate
39	951-11572	Cylinder Head Gasket
53	736-04461	Governor Shaft O-Ring
63	951-11371	Crankcase Cover Gasket
66	951-11577	O-Ring
68	951-11578	Oil Seal
70	736-04440	Oil Drain Plug Washer
105	951-10917	Fuel Cap
--	--	Gasket (Not Shown)
--	--	Gasket Retainer (Not Shown)
--	951-10826	Recoil Spring & Pulley Assembly
--	--	Starter Pulley (Not Shown)
--	--	Recoil Spring (Not Shown)

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Handle & Tine Shield

Drive System

Transmission Assembly

Engine Model - 170-V0A

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