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Illustrated Parts Manual
Transmatic Lawn Tractor
MODELS 660, 680
662, 682
663, 683
665, 685
668, 688
MTD LLC, P.O. BOX 361131 CLEVELAND, OHIO 44136-9722
PRINTED IN U.S.A. FORM NO. 769-00642B.fm
(10/24/2003)
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Models 660, 665, 680 & 685 12 34 33 23 27 18 B ‡ 21 10 30 3 17 23 32 25 29 28 31 † 11 16 † 13 7 A 24 15 A 14 † 9 1 † 26 5 ‡ 7 22 8 2 6 ‡ 2 B ‡ 20 4 ‡ 19 † Found on Models 660 & 680 Only ‡ 5 Only Found on Models 665 & 68 2
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Models 660, 665, 680 & 685 REF. PART NO. NO. DESCRIPTION 1 728-0162 Flat-head Rivet, 1/4 2 710-0642 Self-tapping Screw, 1/4-20 x .75 3 712-0185 U-type Speed Nut, 1/4-20 4 712-0429 Lock Nut, 5/16-18 5 712-0324 Lock Nut, 1/4-20 6 726-0201 Speed Nut, .3125 7 726-04012 Push-on Nut, .25 8 731-1099A Lens 9 738-04015 Shoulder Screw, 5/16-18 x .625 10 738-0952A Shoulder Screw, 1/4-20 x .375 /.125 11 749-0722C Grille Support Rod 12 783-0250A Hood w/ Louvers 13 629-0469B Headlamp Harness Assembly 14 725-
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Models 662, 663, 682 & 683 17 36 24 26 30 † 19 23 B ‡ 21 14 33 5 22 26 34 28 32 31 35 † 15 16 † A 10 4 27 1 † 11 A 13 9 29 7 25 8 † 18 12 2 ‡ 2 B ‡ 20 6 3 † Found on Models 662 & 682 Only ‡ 3 Only Found on Models 663 & 68 4
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Models 662, 663, 682 & 683 REF. PART NO. NO. DESCRIPTION 1 629-0469B Headlamp Harness Assembly 2 710-0642 Self-tapping Screw, 1/4-20 x .75 3 710-0751 Hex Screw, 1/4-20 x .620 4 710-3008 Hex Screw, 5/16-18 x .75 5 712-0185 U-type Speed Nut, 1/4-20 6 712-0429 Lock Nut, 5/16-18 7 712-3027 Lock Nut, 1/4-20 8 725-0963 Headlamp, 12V 9 725-1651 Headlamp Socket 10 726-04012 Push-on Nut, .25 11 728-0162 Flat-head Rivet, 1/4 12 731-1503A Lens 13 736-3078 Flat Washer, .344 x 1.0 x .063 14 738-0952A Should
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Models 668 & 688 25 22 34 5 18 39 32 38 30 35 36 5 33 10 37 26 27 3 29 A A 5 11 17 20 28 31 B 19 1 2 14/15 24 7 6 8 16 12 B 13 9 23 21 4 6
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Models 668 & 688 REF. PART NO. NO. DESCRIPTION 1 629-0469B Headlamp Harness Assembly 2 683-0195 Bracket Assembly 3 710-0351 Screw, #10-16 x .50 4 710-0456 Screw, #10-16 x .50 5 710-0599 Self-tapping Screw, 1/4-20 x .5 6 710-0642 Self-tapping Screw, 1/4-20 x .75 7 710-0751 Hex Cap Screw:1/4-20 x .620 8 710-0896 Hex Index Washer Screw, 1/4-14 x .0625 9 710-3008 Hex Screw, 5/16-18 x .75 10 712-0185 U-type Speed Nut, 1/4-20 11 712-0431 Flange Lock Nut, 3/8-16 12 712-0429 Lock Nut, 5/16-18 13 712-302
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Models 660 – 688 37 21 4 19 35 24 22 3 1 34 5 17 27 23 11 15 25 29 36 13 20 8 16 10 14 33 11 30 31 9 7 26 11 10 6 2 32 12 16 36 28 12 38 39 43 41 42 18 12 44 40 8
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Models 660 – 688 REF. PART REF. PART NO. NO. DESCRIPTION NO. NO. DESCRIPTION 26 741-0487A Flange Bushing, .632 ID 1 17198A Retainer Gear Segment Plate 2 683-0002A Pivot Bar, .625 27 741-0656 Hex Flange Bearing, 5/8 3 710-0514 Hex Cap Screw, 3/8-16 x 1.0 28 747-04008 Tie Rod, Non-adjustable 29 747-1268B Steering Drag Link, 7/16-20 4 710-0643 Hex Cap Screw, 5/16-18 x 1.0 5 710-0726 Self-tapping Screw, 5/16-12 x .75 30 748-0389 Cap, 1.25 x .16 31 748-04014B Steering Arm 6 710-0805 Hex Cap Screw, 5/
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41 Models 660 – 688 40 42 44 43 48 45 49 16 Models with 50 Quick-adjust Seat 20 51 46 47 52 19 14 5 53 21 33 35 15 18 30 Models with Knob-adjust Seat 31** 6 22 32** 28 3 11* 39 19** 29 2 38 12 23 1 4 9 23 6 8 29 10 7 10 26 4 25 27 24 37 31** 13 17 18 36 18 32** 17 34 * Attach the short end of spring to the notch in the rear 19** of Ref. No. 2. Attach the long end to Ref. No. 1. ** Shown in orientation for 38-inch deck. Found on tractor models with 38- or 42-inch deck only. 10
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Models 660 – 688 REF. PART REF. PART NO. NO. DESCRIPTION NO. NO. DESCRIPTION 1 17239C Seat Lift Bracket 28 710-0870 Screw, 3/8-16 x .625 2 17950A RH Pivot Support Bracket, Seat 29 738-04012 Shoulder Screw, .625 x .175, 3/8-16 3 17951A LH Pivot Support Bracket, Seat 30 783-04081A Seat Pivot Bracket, Manual Adjust 4 710-0227 Self-tapping Screw, #8-18 x .50 31 710-0167 Carriage Screw, 1/4-20 x .50 5 710-0726 Self-tapping Screw, 5/16-12 x .75 32 761-0168B Blade Spindle Brake Assembly 6 712-0429 Lock
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Models 660 – 688 53 54 27 72 34 10 37 24 10 2 10 15 36 25 21 75** C 67 D 31 57 22 43 35 68 13 19 73 40 35 50 48 33 74 71 7 44 35 45 40 A 20 44 12 40 14 39 69 42 28 55 B 82 35 40 1 16 70 5 37 34 41 40 35 13 32 6 35 35 13 3 9 38 35 30 4 19 33 12 46 12 6 11 3 26 23 30 82 17 13 8 12 75** 60 63 59* † 52 E 55 C 29 63 58* 10 D 7 52 18 33 76** 56 A ‡ 51 65 F 78** 80*** 8 62 77** 12 61 B 13 81 79 49 64 13 * Attach the ends of springs (Ref. 58 & Ref.59) to the notch openings in the rear of Ref. 25. 66 **
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Models 660 – 688 REF. PART REF. PART NO. NO. DESCRIPTION NO. NO. DESCRIPTION 1 17668A RH Axle Support Bracket 44 748-04307 Lift Link 2 17669A LH Axle Support Bracket 45 783-04093 Stabilizer Bracket (46-inch Decks) 3 17962 Switch Plate 783-04294 Stabilizer Bracket (38- and 42-inch Decks) 4 683-04025 Lift Handle Assembly 46 783-04113 Deck Lift Index Bracket 5 683-04049 Lift Shaft Assembly 47 17630A Shift Lever Retainer 6 710-0224 Self-tapping Screw, #10-16 x .5 48 17840 Transaxle Mounting Bracket
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Models 660 – 688 24 2 12 25 16 23 1 A 14 7 10 21 B 4 10 6 6 19 20 15 5 19 17 8 22 11 18 26 13 33 29 32 27 28 31 B A 3 30 9 11 14
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Models 660 – 688 REF. PART NO. NO. DESCRIPTION 1 618-04034 Transmission, Single-speed 2 656-0059A Variable-speed Pulley, 4.75 3 683-04055A Torque Bracket 4 683-04056 Variable-speed Bracket 5 683-04057 Variable-speed Bracket 6 710-0514 Hex Cap Screw, 3/8-16 x 1.0 7 710-0606 Hex Cap Screw, 1/4-20 x 1.5 8 710-0627 Hex Cap Screw, 5/16-24 x .75 9 710-1260A Screw, 5/16-18 x .75 10 710-3015 Hex Screw,1/4-20 x .75 11 712-0431 Flange Lock Nut, 3/8-16 12 712-0700 Flange Nut, 9/16-18 13 712-3027 Flange Loc
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Models 660 – 688 1 2 3 5 8 6 7 8 4 9 12 10 11 13 21 20 11 12 19 18 16 17 15 22 3 23 24 14 25 28 26 27 29 16
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Models 660 – 688 REF. PART NO. NO. DESCRIPTION 1 732-0614 Ring, Wire 2 716-0231 Ring, E Type, .750 3 736-0336 Flat Washer, 5/8 x 1.0 x .030* 736-0337 Flat Washer, 5/8 x 1.0 x .040* 736-0349 Flat Washer, 5/8 x 1.0 x .020* 4 736-0335 Washer, Thrust .635 x 1.26 x .06 5 710-1325 Self-tapping Screw, 1/4-20 x 1.625 6 719-04017 Upper Housing 7 711-1109 Input Shaft 8 741-0335 Needle Bearing, .625 x .813 x .495 9 717-1464 14-tooth Bevel Pinion 10 716-0108 Retaining Ring, .437 11 741-0340 Sleeve Bearing,
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Models 660 – 688 3 11 (b)(c) 3 12 10 7 9 19 11 1 18 † E 2 16 13 20 23 14 15 4 17 21 5 25 24 8 22 6 8 6 † † Refer to E on Page 12 18
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Models 660 – 688 REF. PART NO. NO. DESCRIPTION 1 618-0138A Spindle Assembly (a) 618-0142A Spindle Assembly (b) (c) 2 683-04003A Deck Shell (a) 683-04004A Deck Shell (b) 683-04035A Deck Shell (c) 3 710-0726 Self-tapping Screw, 5/16-12 x .75 4 710-1260A Screw, 5/16-18 x .75 5 710-1616A Self-tapping Screw, 5/16-18 x .75 6 712-0417A Hex Flange Nut, 5/8-18 7 714-04023 Internal Cotter Pin, .080 x 1.56 8 742-0610A Blade, 19.38” (a) 742-0616A Blade, 21.23” (b) (c) 9 747-04018A Deck Hanger Link/Anti-swa
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Models 660 – 688 7 11 26 30 43 19 40 16 35 3 7 39 39 2 3 41 38 37 19 20 3 30 26 23 G 36 42 4 ‡ 16 6 F 28 21 9 12 34 G 27 22 25 1 14 16 8 24 48 44 29 17 18 33 † E 9 41 45 7 10 31 13 47 5 15 32 31 46 15 † † Refer to E on Page 12 ‡ ‡ Refer to F on Page 12 20
