
For Discount Troy Bilt Parts Call 606-678-9623 or 606-561-4983
21A-644A711 Super Bronco CRT Roto-Tiller (2005) Page 1 of 16
Bumper Attachment
www.mymowerparts.com

For Discount Troy Bilt Parts Call 606-678-9623 or 606-561-4983
21A-644A711 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
www.mymowerparts.com

For Discount Troy Bilt Parts Call 606-678-9623 or 606-561-4983
21A-644A711 Super Bronco CRT Roto-Tiller (2005) Page 3 of 16
Drive
www.mymowerparts.com

For Discount Troy Bilt Parts Call 606-678-9623 or 606-561-4983
21A-644A711 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
www.mymowerparts.com

For Discount Troy Bilt Parts Call 606-678-9623 or 606-561-4983
21A-644A711 Super Bronco CRT Roto-Tiller (2005) Page 5 of 16
Drive Shaft
www.mymowerparts.com