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I det ratsu ll P stra Mlauna
Small Frame Tiller — 640 & 650 Series
TROY-BILT LLC, P.O. BOX 361131 CLEVELAND, OHIO 44136-0019
Printed In USA Form No. 769-03893
(February 22, 2008)
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640 & 650 Series Handle & Tine Shield 23 27 31 25 34 4 28 36 29 30 22 4 41 4 33 1 48 A 24 40 26 48 38 21 16 49 3 35 7 9 32 20 2 46 12 18 11 6 7 9 19 A 39 10 42 14 24 6 37 8 15 5 7 13 17 44 7 49 47 43 45 47 39 2 2
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640 & 650 Series Handle & Tine Shield Ref. Part Number Description Ref. Part Number Description 1. 686-04076 Tine Hood Assembly (A) 26. 712-0291 Hex Lock Nut, 1⁄4-20 — 686-04077 Tine Hood Assembly (B, C) 27. 732-04185 Forward Clutch Spring 28. 746-04208 Forward Clutch Cable Assembly 2. 710-0395 Hex Screw, 5⁄16-18 x 2.25 29. 746-04058 Rev. Clutch Cable Assembly (B, C) 3. 710-0597 Hex Head Screw, 1⁄4-20 x 1 4. 710-0599 Self-Tapping Screw, 1⁄4-20 x 1 ⁄2 30. 747-04210 Forward Clutch Bail 5. 710-0874
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640 & 650 Series Drive System 23 29 40 45 Engine shown for reference only. 8 19 27 14 44 13 49 A 36 25 12 46 33 28 35 48 31 22 21 30 34 6 7 2 A 37 42 32 17 23 15 27 39 3 20 26 1 38 10 18 1 4 5 23 18 24 33 Bronco 22 35 43 28 31 11 30 16 2 15 37 42 37 9 17 25 11 50 15 43 27 20 41 6 3 36 38 18 32 47 4 4
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640 & 650 Series Drive System Ref. Part Number Description Ref. Part Number Description 1. 736-0159 Flat Washer, 5⁄16 27. 736-0119 Lock Washer, 5⁄16 (A) 2. 756-04198 Engine Drive Pulley 28. 750-0535 Spacer, .380 ID x .625 OD x .21 (A) — 736-3050 Flat Washer, .406 x .812 x .051 (B, C) 3. 656-04023A Transmission Pulley (A) 29. 736-3090 Flat Washer, .260 x .720 x .060 — 656-04005A Transmission Pulley (B, C) 4. 756-04169 Reverse Idler Pulley (B, C) 30. 736-0452 Bell Washer, .396 x 1.140 x .095 5. 78
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640 & 650 Series Transmission Assembly 16 20 11 20 17 11 25 20 25 3 7 5 6 9 27 21 19 4 13 21 25 4 1 21 20 18 12 11 2 22 17 25 21 26 18 4 11 20 24 20 15 23 16 25 23 24 8 10 6 6
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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.
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Troy-Bilt Engine (170-TO) 8
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Troy-Bilt Engine (170-TO) Ref Ref Part No. Part Description Qty. Part No. Part Description Qty. No. No. 751-10806 Air Filter Heating Pipe Base 20 1 751-10798 Short Block — — 751-10792 Ignition Complete 22 1 Bolt 1 6 Oil Filler Plug 2 1 751-10818 Air Filter Housing 24 1 O-Ring 3 1 751-10794 Air Filter 24 1 751-10796 Fuel Tank 28 1 Oil Seal 4 1 751-10790 Recoil Starter Assembly 34 1 Left Crankcase Cover 5 1 Radial Ball Bearing 6 1 751-10649 Fuel Filler Cap Complete 38 1 Camshaft Assembly 7 1
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Notes 10
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n toes 11
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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. TROY-BILT LLC, P.O. BOX 361131 CLEVELAND, OHIO 44136-0019
