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77

640 & 650 Series Transmission Assembly

Ref. Part Number

Description

1.

1918377

Cover Housing

2.

619-04013

Transmission Housing

3.

710-04048

Hex Head Flange Screw

4.

710-04049

Hex Head Flange Screw

5.

710-3008

Hex Screw

6.

711-04078

Tiller Shaft

7.

711-04486

Wheel Shaft

8.

711-04882

Drive Shaft

9.

714-04059

Hi-Pro Key

10.

716-04102

Retaining Ring

11.

716-04104

Retaining Ring

12.

717-04380

Worm Gear, 61T

13.

717-04381

Worm Gear, 30T

14.

718-04008

Rear Bearing Cover

15.

721-04030

Oil Seal, .75 x 1.783

16.

721-04031

Oil Seal, 1.0 x 1.499

17.

721-04036

Oil Seal, 1.0 x 1.5

18.

721-04229

Gear Housing Gasket

19.

736-0119

Lock Washer

20.

736-04309

Flat Washer, 1.375 x 1.015 x .062*

736-04308

Flat Washer, 1.5 x 1.75 x .01*

736-04307

Flat Washer, 1.5 x 1.75 x .03*

736-04306

Flat Washer, 1.5 x 1.75 x .005*

736-04305

Flat Washer, 1.5 x 1.75 x .062*

736-04304

Flat Washer, 1.25 x .75 x .06*

736-04260

Flat Washer, 1.015 x 1.375 x .03*

 —

736-04259

Flat Washer, 1.015 x 1.375 x .015*

736-04258

Flat Washer, 1.015 x 1.375 x .01*

736-04257

Flat Washer, 1.015 x 1.375 x .005*

21.

736-04310

Flat Washer, 1.015 x 1.234 x .062

22.

737-04202

Pipe Plug

23.

741-04298

Cone Bearing

24.

741-04299

Cup Bearing

25.

741-04300

Bushing, 1.005 x 1.25 x 1.5

26.

786-04359

Transmission Cover

27.

GW-1104

Woodruff Key, .25 x 1.12

* — The flat washers listed are used as required to obtain .005 to 

.030 in allowable end play on the wheel shaft and tine shaft and 

a .005 to .015 in end play on the drive shaft.

Summary of Contents for 640 Series

Page 1: ...TROY BILT LLC P O BOX 361131 CLEVELAND OHIO 44136 0019 Printed In USA Illustrated Parts Manual Small Frame Tiller 640 650 Series Form No 769 03893 February 22 2008 ...

Page 2: ... 640 650 Series Handle Tine Shield 23 27 25 28 41 33 22 36 31 34 4 29 30 4 1 7 16 2 12 18 46 7 15 8 7 19 11 21 9 20 3 9 10 14 5 13 17 7 44 49 6 24 37 6 32 49 48 24 40 35 38 26 4 47 43 45 47 39 A A 48 39 42 ...

Page 3: ...Hd Screw 1 4 20 x 1 1 4 23 710 04163 Screw 10 24 x 2 24 712 3009 Hex Lock Nut 5 16 18 25 712 0121 Hex Nut 10 24 Ref Part Number Description 26 712 0291 Hex Lock Nut 1 4 20 27 732 04185 Forward Clutch Spring 28 746 04208 Forward Clutch Cable Assembly 29 746 04058 Rev Clutch Cable Assembly B C 30 747 04210 Forward Clutch Bail 31 749 04084 Upper Handlebar 32 749 04208 Lower Handlebar 33 749 04106 Con...

Page 4: ... 40 45 44 13 49 12 46 21 23 34 39 23 5 37 17 32 15 27 20 36 25 33 28 35 22 31 30 6 2 42 7 48 26 1 10 1 4 18 43 11 15 9 37 16 24 18 38 3 18 38 3 6 41 32 36 11 43 50 42 2 30 31 35 25 28 33 22 37 17 15 27 20 47 A A Bronco Engine shown for reference only ...

Page 5: ...000 Lock Nut 3 8 16 26 712 3009 Lock Nut 5 16 18 B C Ref Part Number Description 27 736 0119 Lock Washer 5 16 A 28 750 0535 Spacer 380 ID x 625 OD x 21 A 736 3050 Flat Washer 406 x 812 x 051 B C 29 736 3090 Flat Washer 260 x 720 x 060 30 736 0452 Bell Washer 396 x 1 140 x 095 31 710 0459A Hex Head Screw 3 8 24 x 1 50 32 736 04181 Support Washer 690 x 1 250 x 075 33 732 04085 Forward Return Spring ...

Page 6: ...6 6 640 650 Series Transmission Assembly 16 20 11 25 7 9 4 4 1 18 22 4 26 18 20 17 11 20 25 6 27 3 5 19 13 21 21 21 21 12 2 25 20 11 17 25 20 11 16 20 23 24 15 25 24 23 10 8 ...

Page 7: ...Washer 20 736 04309 Flat Washer 1 375 x 1 015 x 062 736 04308 Flat Washer 1 5 x 1 75 x 01 736 04307 Flat Washer 1 5 x 1 75 x 03 736 04306 Flat Washer 1 5 x 1 75 x 005 736 04305 Flat Washer 1 5 x 1 75 x 062 736 04304 Flat Washer 1 25 x 75 x 06 736 04260 Flat Washer 1 015 x 1 375 x 03 736 04259 Flat Washer 1 015 x 1 375 x 015 736 04258 Flat Washer 1 015 x 1 375 x 01 736 04257 Flat Washer 1 015 x 1 3...

Page 8: ...Troy Bilt Engine 170 TO 8 ...

Page 9: ...ad Rocker Arm 51 2 Valve Adjusting Nut 52 2 Pivot Locking Nut 53 2 Cylinder Head Complete 54 1 Dowel Pin 56 2 Muffler Gasket 59 1 Part No Part Description Ref No Qty 751 10798 Short Block Bolt 1 6 Oil Filler Plug 2 1 O Ring 3 1 Oil Seal 4 1 Left Crankcase Cover 5 1 Radial Ball Bearing 6 1 Camshaft Assembly 7 1 Dowel Pin 8 1 Dowel Pin 9 1 Case Cover Packing 10 1 Crankshaft Complete 11 1 Governor Ki...

Page 10: ...Notes 10 ...

Page 11: ...11 Notes ...

Page 12: ...O BOX 361131 CLEVELAND OHIO 44136 0019 To order replacement parts or locate your nearest service dealer call Customer Support at 800 828 5500 or visit www troybilt com to find the nearest authorized dealer in your area ...

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