Troy-Bilt 640 - Manual (Page 6)

66
640 & 650 Series Transmission Assembly
Ref. Part Number Description
1. 619-04190 Transmission Housing
2. 710-3008 Hex Screw, 5⁄16-18 x .75
3. 711-04844 Shaft
4. 711-04854 Wheel Shaft
5. 711-04882 Drive Shaft
6. 714-04059 Hi-Pro Key, .25 x 1.062
7. 716-0204 Retaining Ring
8. 716-04102 Retaining Ring
9. 717-04380 Worm Gear, 61T
10. 717-04381 Worm Gear, 30T
11. 718-04435 Bearing Cover
12. 721-04030 Oil Seal, .750 x 1.783
13. 721-04232 Oil Seal, 1.00 x 2.00
Ref. Part Number Description
14. 736-04305 Flat Washer, 1.50 x 1.75 x .062*
— 736-04306 Flat Washer, 1.50 x 1.75 x .005*
— 736-04307 Flat Washer, 1.50 x 1.75 x .03*
— 736-04308 Flat Washer, 1.50 x 1.75 x .010*
15. 736-0745 Flat Washer, 1.010 x 1.56 x .060
16. 737-04214 Plastic Plug
17. 741-04298 Cone Bearing
18. 741-04299 Cup Bearing
19. 741-3114 Ball Bearing
20. 750-04943 Spacer, 1.00 x 1.25 x .73
21. 750-04944 Spacer, 1.00 x 1.25 x .98
22. 786-04366 Transmission Cover
12
8
18
22
2
16
2
2
16 2
6
20
19
7
13
4
15
10
13
7
19
21
6
3
15
2 21
19
7
13
1
21
19
7 13
14
18
17
15
9
15
5
* — Washers of multiple thickness are used as required to obtain
.005” to .015” of end play in the drive shaft