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21A-645A711 5HP CRT Roto-Tiller (2007) Page 1 of 16
Drive & Wheels
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21A-645A711 5HP CRT Roto-Tiller (2007) Page 2 of 16
Drive & Wheels
Ref # Part Number Qty DescriptionS/P/F
1 736-0159 Flat Washer, 5/161 S
2 756-04198 Pulley, Engine Drive1 S
3 656-04023 Transmission Pulley Bronco Model1
3 656-04005 Transmission Pulley Super Bronco and
1 S
Pro-Line Models
4 756-04169 Pulley, Reverse Idler Super Bronco and
5 786-04095 Guard, Belts/Pulleys1 S
6 754-04090 Forward Drive Belt1 S
7 754-04091 Reverse Drive Belt Super Bronco and
8 731-05268 Belt Cover1 /P
9 732-04289 Reverse Return Spring Super Bronco and
10 732-04081 Belt Guide Super Bronco and Pro-Line
11 732-04079 Belt Guide1 S
12 786-04068 Engine Bracket, Left1 /P
13 786-04069 Engine Bracket, Right1
14 786-04070 Bracket, Belt Cover1 S
15 748-04087 Shoulder Washer1 S
16 786-04276 Reverse Idler Arm Super Bronco and
17 786-04275 Forward Idler Lever1 S
18 710-0672 Hex Hd. Screw, 5/16-24 x 1.25 Bronco Model1 /P
18 710-0117 Hex Hd. Screw, 5/16-24 x 1 Super Bronco
1 S
Pro-Line Models
1 S
Pro-Line Models
1 S
Pro-Line Models
1 /P
Models
1 /P
Pro-Line Models
1 S
and Pro-Line Models
19 710-0237 Hex Hd. Screw, 5/16-24 x 5/81 /P
20 710-0376 Hex Hd. Screw, 5/16-18 x 11 /P
21 710-04049 Hex Hd. Screw, 5/16-18 x 5/81 /P
22 710-0347 Hex Hd. Screw, 3/8-16 x 1-3/4 Bronco Model1 /P
22 710-0520 Hex Hd. Screw, 3/8-16 x 1.50 Super Bronco
23 710-0599 Screw, Self-Tapping, 1/4-20 x 1/21 /P
24 710-3103 Hex Hd. Screw, 5/16-18 x 2 Super Bronco
25 712-3000 Lock Nut, 3/8-161 S
26 712-3009 Lock Nut, 5/16-18 Super Bronco and
27 736-0119 Lock Washer, 5/16 Bronco Model1 S
28 750-0535 Spacer, .380 ID x .625 OD x .21 Bronco
28 736-3050 Flat Washer .406 x .812 x .051 Super Bronco
29 736-3090 Flat Washer1 /P
30 736-0452 Bell Washer1 S
31 710-0459A Hex Hd. Screw, 3/8-24 x 1.50, GR51 /P
1 /P
and Pro-Line Models
1 /P
and Pro-Line Models
1 S
Pro-Line Models
1 S
Model
1 /P
and Pro-Line Models
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For Discount Troy Bilt Parts Call 606-678-9623 or 606-561-4983
21A-645A711 5HP CRT Roto-Tiller (2007) Page 3 of 16
Drive & Wheels
Ref # Part Number Qty DescriptionS/P/F
32 736-04181 Support Washer1 S
33 732-04085 Forward Return Spring1 /P
34 786-04107 Bracket, Cable Mounting1
35 756-04170 Forward Idler Pulley1 /P
36 714-0105 Key, 3/16" x 1"1 S
37 736-3078 Flat Washer1 /P
38 736-04193 Belleville Washer1 /P
39 710-0805 Hex Screw, 5/16-18 x 1.50 Gr5 Super Bronco
1 /P
and Pro-Line Models
39 710-0395 Hex Screw, 5/16-18 x 2-1/4, Gr5 Pro-Line
40 712-04063 Nut, Hex Lock, 5/16-181 /P
41 750-0258 Spacer, Shoulder Bronco Model1 /P
42 736-0315 Washer, Flat, .75 x 1.5 x .125 Bronco Model1 /P
42 736-04192 Flat Washer .786 x 1.000 x .031 Super
43 736-0242 Bell Washer1 /P
44 749-04193 Bumper Pro-Line Model1 S
45 726-0201 Nut, Speed, 5/16-18 Pro-Line Model1
46 714-0143 Klik Pin1 S
47 734-04188 Complete Wheel Assembly 10 x 2.75 Bronco
48 634-04232 Complete Wheel Assembly 13x 5 x 6 Super
634-04218 Rim Assembly Super Bronco and Pro-Line
734-04163 Tire Super Bronco and Pro-Line Models1 S
734-0255 Air Valve1 S
49 714-04048 Cotter Pin1 /P
50 711-04126 Clevis Pin1 /P
51 618-04360 Transmission Assembly Bronco Model1 S
51 618-04362 Transmission Assembly Super Bronco and
1 /P
Model
1 /P
Bronco and Pro-Line Models
1
Model
1 S
Bronco and Pro-Line Models
1
Models
1 S
Pro-Line Models
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For Discount Troy Bilt Parts Call 606-678-9623 or 606-561-4983
21A-645A711 5HP CRT Roto-Tiller (2007) Page 4 of 16
Drive Shaft
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21A-645A711 5HP CRT Roto-Tiller (2007) Page 5 of 16
Drive Shaft
Ref # Part Number Qty DescriptionS/P/F
1 GW-9517 Snap Ring1 S
2 GW-1714 Bearing, Tapered Roller (with race)1 S
3 GW-50043 Support Washer, Rear1 S
4 711-04110 Drive Shaft1 S
5 GW-1224-1 Shim, Rear Bearing Cap, .010" thick Use as
1 S
required to obtain between .005" and .015"
allowable end-play
5 GW-1224-2 Shim, same as above, except .030" thick
5 GW-1224-3 Shim, same as above, except .005" thick
5 GW-1224-4 Shim, same as above, except .062" thick
GW-1325C Shim Set Incl. The following shims: two
1 S
Use as required to obtain between .005" and
.015" allowable end-play
1 S
Use as required to obtain between .005" and
.015" allowable end-play
1 S
Use as required to obtain between .005" and
.015" allowable end-play
1 /P
#1224-1, two #1224-2 & one #1224-4
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21A-645A711 5HP CRT Roto-Tiller (2007) Page 6 of 16
General Assembly
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21A-645A711 5HP CRT Roto-Tiller (2007) Page 7 of 16
General Assembly
Ref # Part Number Qty DescriptionS/P/F
1 686-04076 Tine Hood Assembly Bronco Model1 S
1 686-04077 Tine Hood Assembly Super Bronco and
2 710-0395 Hex Screw, 5/16-18 x 2.251 /P
3 710-0597 Hex Hd. Screw, 1/4-20 x 11 /P
4 710-0599 Screw, Self-Tapping,1/4-20 x 1/21 /P
5 710-0874 Hex Hd. Screw, 5/16-18 x 1-1/41 /P
6 710-3008 Hex Hd. Screw, 5/16-18 x .751 /P
7 712-04063 Hex Lock Nut, Nylon, 5/16-181 /P
8 712-04064 Hex Lock Nut, Nylon, 1/4-201 /P
9 715-0108 Spirol Pin1 /P
10 732-04320 Spring, Depth Regulator1 /P
11 736-0275 Flat Washer, 5/161 S
12 750-04149 Spacer, .462 x .328 x 1.631
13 750-04160 Bushing1 S
14 750-04556 Spacer1
15 786-04092 Reverse Stop Arm1 /P
16 786-04098 Channel Support Bracket1
17 786-04104 Drag Bar1 /P
18 786-04191 Flap Stop Bracket1 S
19 786-04290 Hood Bracket, Left Hand1
20 786-04291 Hood Bracket, Right Hand1
21 786-04292 Adjustable Depth Bar1
22 710-0106 Hex Hd. Screw, 1/4-20 x 1-1/41 /P
23 710-04163 Screw, #10-24 x 21 /P
24 712-3009 Hex Lock Nut, 5/16-181 S
25 712-0121 Hex Nut, #10-241 S
26 712-0291 Hex Lock Nut, 1/4-201 S
27 732-04185 Spring, Forward Clutch1
28 746-04208 Cable Assembly, Forward Clutch1 S
29 746-04058 Cable Assembly, Reverse Clutch Super
1 S
Pro-Line Models
1 S
Bronco and Pro-Line Models
30 747-04210 Bail, Forward Clutch1 S
31 749-04084 Upper Handlebar1 S
32 749-04208 Lower Handlebar1 S
33 786-04106 Tab, Conduit Mount1
34 786-04040 Bracket, Reverse Clutch Cable Super Bronco
35 786-04188 Handlebar Support1 S
36 786-04200 Panel1 S
37 710-0216 Screw, Hex, 3/8-16 x 3/41 /P
38 710-0805 Screw, Hex, 5/16-18 x 1-1/21 /P
39 712-3000 Hex Lock Nut, 3/8-161 S
40 736-0119 Lock Washer, 5/161 S
41 725-0157 Cable Tie1 /P
42 736-3050 Flat Washer, 3/81 /P
43 712-04065 Flange Lock Nut 3/8-161 /P
44 710-0347 Hex Hd. Screw, 3/8-16 x 1-3/41 /P
45 710-0514 Hex Hd. Screw, 3/8-16 x 1, Grade 51 /P
46 710-04048 Flange Screw .312-18 x 1.001 /P
47 742-04116 Single Bolo Tine See Tine Chart1 S
48 742-04117 Single Bolo Tine See Tine Chart1 S
1
and Pro-Line Models
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For Discount Troy Bilt Parts Call 606-678-9623 or 606-561-4983
21A-645A711 5HP CRT Roto-Tiller (2007) Page 8 of 16
General Assembly
Ref # Part Number Qty DescriptionS/P/F
49 686-04066 Tine Holder Bronco Model1
49 686-04065 Tine Holder Super Bronco and Pro-Line
1 S
Models
GW-1901 Bolo Tine Replacement Set Incl. 8 RH tines,
1 /P
8 LH tines & required hardware; Bronco,
Super Bronco and Pro-Line Models
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For Discount Troy Bilt Parts Call 606-678-9623 or 606-561-4983
21A-645A711 5HP CRT Roto-Tiller (2007) Page 9 of 16
Quick Reference 645A
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21A-645A711 5HP CRT Roto-Tiller (2007) Page 10 of 16
Quick Reference 645A
Ref # Part Number Qty DescriptionS/P/F
490-250-0009 Spark Plug1
N/A Pre Filter1
17211-ZL8-023 Air Filter1
16910-ZV4-015 Fuel Filter1
754-04090 Drive Belt (FWD)1 S
754-04091 Drive Belt (REV)1 S
756-04170 Idler Pulley (FWD)1 /P
756-04169 Idler Pulley (REV)1 S
746-04208 Clutch Cable (FWD)1 S
746-04058 Clutch Cable (REV)1 S
742-04117 Tines Outer See Tine Chart1 S
742-04116 Tines Outer See Tine Chart1 S
N/A Tines Inner (LH)1
N/A Tines Inner (RH)1
N/A Rim1
734-04163 Tire1 S
634-04232 Wheel Assembly1 S
N/A Foam Grip1
N/A Handle Knob1
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For Discount Troy Bilt Parts Call 606-678-9623 or 606-561-4983
21A-645A711 5HP CRT Roto-Tiller (2007) Page 11 of 16
Tine Chart
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21A-645A711 5HP CRT Roto-Tiller (2007) Page 12 of 16
Tine Chart
Ref # Part Number Qty DescriptionS/P/F
742-04116-0637 Tines1 S
742-04117-0637 Tines1 S
742-04118-0637 Tines1 /P
742-04119-0637 Tines1 /P
1901118 Set of Tines1 S
GW-1901 Set of Tines1 /P
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21A-645A711 5HP CRT Roto-Tiller (2007) Page 13 of 16
Transmission
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21A-645A711 5HP CRT Roto-Tiller (2007) Page 14 of 16
Transmission
Ref # Part Number Qty DescriptionS/P/F
2 1909950 Retainer, Snap Ring1 S
3 GW-1166-1 Shim, 0.062" thick Use as required to obtain
1 S
between .005" and .030" allowable end-play
3 GW-1166-2 Shim, 0.030" thick Use as required to obtain
3 GW-1166-3 Shim, 0.015" thick Use as required to obtain
3 GW-1166-4 Shim, 0.010" thick Use as required to obtain
3 GW-1166-5 Shim, 0.005" thick Use as required to obtain
4 GW-1086 Bronze Bushing1 S
5 711-04512 Wheel Shaft Bronco Model1 S
5 711-04092 Wheel Shaft Super Bronco Model1 S
5 711-04486 Wheel Shaft Pro-Line Model1 S
6 GW-9305 Key, Hi-Pro, 1/4 x 11 S
7 GW-1132-2 Spacer1 /P
8 717-04380 Worm Gear, Wheel Shaft1 S
9 711-04078 Tiller Shaft1 S
10 GW-1104 Woodruff Key1 /P
11 717-04381 Worm Gear, Tiller Shaft1 S
1 /P
between .005" and .030" allowable end-play
1 /P
between .005" and .030" allowable end-play
1 S
between .005" and .030" allowable end-play
1 S
between .005" and .030" allowable end-play
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21A-645A711 5HP CRT Roto-Tiller (2007) Page 15 of 16
Transmission Housing
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21A-645A711 5HP CRT Roto-Tiller (2007) Page 16 of 16
Transmission Housing
Ref # Part Number Qty DescriptionS/P/F
1 GW-9727 Plug, Transmission Oil Fill1 S
2 710-04049 Hex Hd. Flange Screw, 5/16-18 x 5/8,Gr. 51 /P
3 736-0119 Lock Washer, 5/161 S
4 1918377 Rear Cover, Transmission1 S
5 1916641 Front Cover, Transmission1 S
6 GW-50032 Gasket, Housing Cover1 S
7 721-04030 Oil Seal, Drive Shaft1 S
8 721-04031 Oil Seal, Wheel Shaft1 S
9 619-04013 Transmission Housing Assembly1 S
10 721-04036 Oil Seal, Tine Shaft1 S
11 736-3008 Washer, Flat, .344 x .750 x .120 Included
1 S
with transmission when purchased as an
assembly only. Remove & discard when
installing the transmission on tiller.
12 718-04008 Rear Bearing Cap1 S
13 710-04048 Hex Hd. Flange Screw, 5/16-18 x 11 /P
14 710-3008 Hex Hd. Flange Screw, 5/16-18 x 3/41 /P
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