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21A-644A766 Super Bronco CRT Roto-Tiller (2005) Page 1 of 16
Bumper Attachment
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21A-644A766 Super Bronco CRT Roto-Tiller (2005) Page 2 of 16
Bumper Attachment
Ref # Part Number Qty DescriptionS/P/F
1 749-04193 Bumper For Model 644A1 S
2 710-0395 Hex Screw, 5/16-18 x 2-1/4, Gr5 For Model
3 726-0201 Nut, Speed, 5/16-18 For Model 644A1
4 712-04063 Hex Lock Nut, Nylon, 5/16-18 For Model
1 /P
644A
1 /P
644A
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21A-644A766 Super Bronco CRT Roto-Tiller (2005) Page 3 of 16
Drive
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21A-644A766 Super Bronco CRT Roto-Tiller (2005) Page 4 of 16
Drive
Ref # Part Number Qty DescriptionS/P/F
1 736-0159 Flat Washer, 5/161 S
2 714-0139 Key, 3/16" x 2" For Model 640C1 /P
1108841 Key, 3/16" x 1-1/2" For Model 644A1 S
3 1916351 Pulley, Engine Drive1
4 656-04023 Transmission Pulley For Model 640C1
656-04005 Transmission Pulley For Model 644A1 S
5 1916535 Pulley, Reverse Idler For Model 644A1 /P
6 1916652 Guard, Belts/Pulleys1 S
7 1916657 Forward Drive Belt1 /P
8 1916658 Reverse Drive Belt For Model 644A1 /P
9 1916660 Belt Cover1 S
10 1916724 Reverse Return Spring For Model 644A1 /P
11 1916725 Belt Guide For Model 644A1 S
12 1916726 Forward Belt Guide1 /P
13 1916794 Engine Bracket, Left1 S
14 1916795 Engine Bracket, Right1 S
15 1917326 Bracket, Belt Cover1 S
16 1917746 Shoulder Washer1 S
17 1918731 Reverse Idler Arm For Model 644A1 S
18 1918744 Forward Idler Lever1 S
19 710-0627 Hex Hd. Screw, 5/16-24 x 1.25 For Model
1 /P
640C
710-0117 Hex Hd. Screw, 5/16-24 x 1 For Model 644A1 S
20 710-0237 Hex Hd. Screw, 5/16-24 x 5/81 /P
21 710-0376 Hex Hd. Screw, 5/16-18 x 11 /P
22 710-04049 Hex Hd. Screw, 5/16-18 x 5/81 /P
23 710-0347 Hex Hd. Screw, 3/8-16 x 1-3/41 /P
24 710-0599 Screw, Self-Tapping, 1/4-20 x 1/21 /P
25 710-3103 Hex Hd. Screw, 5/16-18 x 2 For Model 644A1 /P
26 712-3000 Lock Nut, 3/8-161 S
27 712-3009 Lock Nut, 5/16-181 S
28 736-0119 Lock Washer, 5/161 S
29 750-0535 Spacer, .380 ID x .625 OD x .211 S
30 736-3090 Flat Washer1 /P
31 736-0452 Bell Washer1 S
32 710-0151 Hex Hd. Screw, 3/8-24 x 2.0, GR51 /P
33 GW-50027 Support Washer1 /P
34 GW-55034 Forward Return Spring1 S
35 GW-55049 Bracket, Cable Mounting1
36 GW-9090 Forward Idler Pulley1 S
37 GW-9301 Key, 3/16" x 1"1 S
38 736-3078 Flat Washer1 /P
39 GW-9944 Belleville Washer1 S
40 710-0395 Hex Screw, 5/16-18 x 2.25 Gr5 For Model
1 /P
640C
41 712-3010 Nut, Hex Lock, 5/16-18 For Model 640C1 S
42 750-0258 Spacer, Shoulder For Model 640C1 /P
43 736-0315 Washer, Flat, .75 x 1.5 x .125 For Model
GW-1138-2 Shim, 1.0 x .765 x .031 For Model 644A1 S
1 /P
640C
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21A-644A766 Super Bronco CRT Roto-Tiller (2005) Page 5 of 16
Drive Shaft
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21A-644A766 Super Bronco CRT Roto-Tiller (2005) Page 6 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.
GW-1224-2 Shim, same as above, except .030" thick
GW-1224-3 Shim, same as above, except .005" thick
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); Use as
required to obtain between .005" and .015"
allowable end-play.
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21A-644A766 Super Bronco CRT Roto-Tiller (2005) Page 7 of 16
Handlebar Assembly
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21A-644A766 Super Bronco CRT Roto-Tiller (2005) Page 8 of 16
Handlebar Assembly
Ref # Part Number Qty DescriptionS/P/F
1 1916719 Cable Assembly, Reverse Clutch For Model
2 1916755 Upper Handlebar1 S
3 747-04210 Bail, Forward Clutch1 S
4 1918745 Cable Assembly, Forward Clutch1 S
5 710-0599 Screw, Self-Tapping,1/4-20 x 1/21 /P
6 710-3008 Screw, Hex, 5/16-18 x 3/41 /P
7 712-3009 Hex Lock Nut, 5/16-181 S
8 786-04188 Handlebar Support1 S
9 GW-55043 Lower Handlebar1 S
10 786-04200 Panel1 S
11 GW-55044 Tab, Conduit Mount1 /P
12 GW-9855 Screw, #10-24 x 21 S
13 725-0157 Cable Tie1 /P
14 736-3050 Flat Washer, 3/81 /P
15 786-04040 Bracket, Reverse Clutch Cable For Model
1 S
644A
1
644A
16 732-04185 Spring, Forward Clutch1
17 710-0106 Hex Hd. Screw, 1/4-20 x 1-1/41 /P
18 710-0216 Screw, Hex, 3/8-16 x 3/41 /P
20 710-0805 Screw, Hex, 5/16-18 x 1-1/21 /P
21 712-0121 Hex Nut, #10-241 S
22 712-0291 Hex Lock Nut, 1/4-201 S
23 712-3000 Hex Nut, 3/8-161 S
25 736-0119 Lock Washer, 5/161 S
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21A-644A766 Super Bronco CRT Roto-Tiller (2005) Page 9 of 16
Hood Assembly
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Hood Assembly
Ref # Part Number Qty DescriptionS/P/F
1 715-0108 Spirol Pin1 /P
2 710-0597 Hex Hd. Screw, 1/4-20 x 11 /P
3 710-0599 Screw, Self-Tapping,1/4-20 x 1/21 /P
4 710-0874 Hex Hd. Screw, 5/16-18 x 1-1/41 /P
5 710-3008 Hex Hd. Screw, 5/16-18 x .751 /P
6 712-04064 Hex Lock Nut, Nylon, 1/4-201 /P
7 712-04063 Hex Lock Nut, Nylon, 5/16-181 /P
8 1916707 Channel Support Bracket1 S
9 736-0119 Lock Washer, 5/161 S
10 GW-55013-1 Hood Bracket, Left Hand1 S
11 GW-55013-2 Hood Bracket, Right Hand1 S
12 GW-55015 Drag Bar1 S
13 GW-55018 Depth Regulator Lever1 S
14 686-04043 Tine Hood Assembly For Model 640C1 S
686-04041 Tine Hood Assembly For Model 644A1 S
15 GW-55088 Bushing1 /P
16 GW-9384 Spring, Depth Regulator1 S
17 GW-9534 Spacer1 /P
18 710-04048 Hex Hd. Flange Screw, 5/16-18 x 11 /P
19 618-04254 Transmission Assembly For Model 640C1 S
618-04046 Transmission Assembly For Model 644A1 S
20 786-04191 Flap Stop Bracket1 S
21 1916570 Reverse Stop Arm1 S
22 710-0395 Hex Screw, 5/16-18 x 2.251 /P
23 1916771 Spacer, .462 x .328 x 1.631 /P
24 736-0275 Flat Washer, 5/161 S
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21A-644A766 Super Bronco CRT Roto-Tiller (2005) Page 11 of 16
Tines
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Tines
Ref # Part Number Qty DescriptionS/P/F
1 710-0514 Hex Hd. Screw, 3/8-16 x 1, Grade 51 /P
2 GW-50049-02 Single Bolo Tine - Left Hand1 S
3 712-3000 Hex Lock Nut, 3/8-161 S
4 710-0347 Hex Hd. Screw, 3/8-16 x 1-3/41 /P
5 GW-50049-01 Single Bolo Tine - Right Hand1 S
6 1915075 Tine Holder For Model 640C1 S
1916747 Tine Holder For Model 644A1 S
7 1917486 Wheel & Tire Ass'y - Left/Right Side For
1 /P
Model 644A
734-04162 Wheel & Tire Ass'y - Left Side Only For
8 734-04161 Wheel & Tire Ass'y - Right Side Only For
9 GW-9380 Clevis Pin, .312" x 1-3/4"1 S
10 GW-9338 Hair Pin Cotter1 S
GW-1901 Bolo Tine Replacement Set (Incl. eight
1 /P
Model 640C
1 /P
Model 640C
1 /P
right-hand tines, eight left-hand tines and
required hardware.; For Models 640C & 644A
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21A-644A766 Super Bronco CRT Roto-Tiller (2005) Page 13 of 16
Transmission Housing
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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 and 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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Wheel Shaft
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Wheel Shaft
Ref # Part Number Qty DescriptionS/P/F
1 GW-9512 Retainer, Snap Ring, "E" Type1 /P
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.
GW-1166-2 Shim, 0.030" thick Use as required to obtain
GW-1166-3 Shim, 0.015" thick Use as required to obtain
GW-1166-4 Shim, 0.010" thick Use as required to obtain
GW-1166-5 Shim, 0.005" thick Use as required to obtain
4 GW-1086 Bronze Bushing1 S
5 711-04088 Wheel Shaft For Model 640C1 S
711-04092 Wheel Shaft For Model 644A1 S
6 GW-9305 Key, Hi-Pro, 1/4 x 11 S
7 GW-1132-2 Spacer1 /P
8 1904278 Worm Gear, Wheel Shaft1 S
9 711-04078 Tiller Shaft1 S
10 GW-1104 Woodruff Key1 /P
11 1916542 Worm Gear, Tiller Shaft1 S
1 /P
1 /P
1 S
1 S
between .005" and .030" allowable end-play.
between .005" and .030" allowable end-play.
between .005" and .030" allowable end-play.
between .005" and .030" allowable end-play.
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