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MTD 668 manual

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Table of contents for the manual

  • Page 1

    FORM NO . 769-00642B.f m (10/24/200 3) PRINTED IN U .S.A. Illustr ated P ar ts Man ual T r ansmatic La wn T r actor MODELS 660, 680 662, 682 663, 683 665, 685 668, 688 MTD LLC, P.O. BOX 361131 CLEVELAND, OHIO 44136-9722[...]

  • Page 2

    2 Model s 660, 665, 680 & 685 B A A B 8 17 18 15 12 14 6 7 † 7 ‡ 9 5 † 1 † 11 † 13 4 16 2 2 ‡ 10 19 ‡ 21 ‡ 32 31 30 23 27 3 23 28 33 † Found on Models 660 & 6 80 Only ‡ Found on Models 665 & 68 5 Only 20 ‡ 22 25 29 24 26 34[...]

  • Page 3

    3 Models 660, 665, 680 & 685 REF . NO . PA R T 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 [...]

  • Page 4

    4 Model s 662, 663, 682 & 683 B A A B † Found on Models 662 & 6 82 Only ‡ Found on Models 663 & 68 3 Only 17 21 ‡ 34 35 33 6 2 2 ‡ 3 20 ‡ 25 27 29 28 32 26 30 5 24 22 23 10 † 15 † 26 31 11 † 14 1 9 8 12 16 4 13 7 18 † 19 † 36[...]

  • Page 5

    5 NOTE: Tractor features vary by mode l. NOT all pa rts listed above and pictured on the previous page are sta ndard equip ment. Models 662, 663, 682 & 683 REF . NO . PA R T 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 [...]

  • Page 6

    6 Models 66 8 & 688 A A B B 30 33 39 18 5 34 35 5 32 10 25 22 38 37 36 27 5 26 3 20 17 11 19 2 1 14/15 24 16 4 9 21 12 13 7 8 23 6 28 29 31[...]

  • Page 7

    7 NOTE: Tractor features vary by mode l. NOT all pa rts listed above and pictured on the previous page are sta ndard equip ment. Models 668 & 688 REF . NO . PA R T 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[...]

  • Page 8

    8 Model s 660 – 688 21 4 19 35 24 37 3 22 1 11 25 13 17 27 20 11 33 29 6 10 8 14 9 31 11 32 30 7 10 5 34 42 12 41 38 12 18 44 28 39 43 12 16 36 2 36 16 26 15 23 40[...]

  • Page 9

    9 Models 660 – 688 REF . NO . PA R T NO . DESCRIPTION 1 17198A Retainer Gear Segment Plate 2 683-0002A Pivot Bar, .625 3 710-0514 Hex Cap Screw, 3/8-16 x 1.0 4 710-0643 Hex Cap Screw, 5/16-18 x 1.0 5 710-0726 Self-ta pping Screw, 5/16-12 x .75 6 710-0805 Hex Cap Screw, 5/16-18 x 1.5 7 710-1309 Machine Screw, 5/16-18 x .75 8 712-0240 Jam Nut, 7/16[...]

  • Page 10

    10 Model s 660 – 688 14 6 3 12 1 30 28 11* 2 6 9 8 10 7 10 4 16 20 5 21 13 31** 17 1 7 18 32** 34 1 8 19** 32** 19 ** 18 31** 22 15 33 23 4 23 26 25 24 27 29 * Attach the short end of spring to the notch in the re ar 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-[...]

  • Page 11

    11 Models 660 – 688 REF . NO . PA R T NO . DESCRIPTION 1 17239C Seat Lift Bracket 2 17950A RH Pivot Support Bracket, Seat 3 17951A LH Pivot Support Bracket, Seat 4 710-0227 Self-ta pping Screw, #8-18 x .50 5 710-0726 Self-ta pping Screw, 5/16-12 x .75 6 712-0429 Lock Nut , 5/16-18 7 725-1303 Outer Seat Spring Switch 8 725-1439 Inner Seat Spring S[...]

  • Page 12

    12 Model s 660 – 688 62 55 69 33 68 57 71 35 67 12 13 49 13 12 66 64 65 63 52 33 56 51 58* 43 63 52 10 70 10 13 48 37 34 15 21 45 35 31 36 2 35 39 40 40 35 44 42 32 35 38 5 41 35 35 40 44 40 40 13 6 3 30 9 19 6 3 30 12 1 13 59* 29 7 18 8 17 12 4 16 46 12 34 37 20 14 33 10 10 25 50 7 19 28 27 26 22 24 72 53 54 81 35 60 23 B A C A B C D D 55 74 73 [...]

  • Page 13

    13 Models 660 – 688 REF . NO . PA R T NO . DESCRIPTION 1 17668A RH Axle Support Bracket 2 17669A LH Axle Support Bracket 3 17962 Switch Plate 4 683-04025 Lift Handle Assembly 5 683-04049 Lift Shaft Assembly 6 710-0224 Self-tapping Screw, #10-16 x .5 7 710-0599 Self-t apping Screw, 1/4-20 x .5 8 710-0627 Hex Cap Screw, 5/16-24 x .75 9 710-0642 Sel[...]

  • Page 14

    14 Model s 660 – 688 27 18 29 31 26 32 28 30 12 24 23 2 16 25 1 A B B A 14 2 1 7 10 4 6 20 15 17 8 13 22 6 19 5 19 11 10 9 1 1 3 33[...]

  • Page 15

    15 Models 660 – 688 REF . NO . PA R T 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 .[...]

  • Page 16

    16 Model s 660 – 688 8 3 2 1 5 6 8 4 10 9 7 12 1 1 11 12 1 3 14 3 17 15 16 18 19 20 21 22 23 24 25 28 29 27 26[...]

  • Page 17

    17 Models 660 – 688 NO TE: If rebuilding the upper housing, include two ounces (2 oz.) of U nire x ® N3 grease (Part No. 737-0289) in the input shaft cavity . REF . NO . PA R T 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 Washe[...]

  • Page 18

    18 Model s 660 – 688 † Refer t o E † on Page 12 19 18 17 16 24 21 3 (b)(c) 11 11 10 E † 1 2 9 7 12 15 14 13 20 8 8 6 6 25 22 23 4 5 3[...]

  • Page 19

    19 Models 660 – 688 REF . NO . PA R T 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 Flang[...]

  • Page 20

    20 Model s 660 – 688 41 48 47 46 13 E † † Refer t o E † on Page 12 G G 41 20 17 12 8 22 27 25 1 4 29 24 16 5 45 7 15 15 31 31 3 2 10 44 9 33 18 4 16 28 1 23 42 19 30 26 36 6 21 9 34 11 26 30 35 19 2 7 7 3 40 39 43 37 39 3 3 16 38 F ‡ ‡ Refer t o F ‡ on Page 12[...]

  • Page 21

    21 Models 660 – 688 REF . NO . PA R T NO . DESCRIPTION 1 17116 Deck Brake Assembly 2 17258D RH Belt Cover 3 618-0240A Spindle Assemb ly, 5.0 Dia. 756-1187 Pulley Only 4 683-04133 46-inch Deck Shell 5 710-0514 Hex Cap Screw, 3/8-16 x 1.0 6 710-0520 Hex Cap Screw, 1/4-20 x 1.5 7 710-0599 Self-t apping Screw, 1/4-20 x .5 8 726-0233 Push Nut, 1/4 9 7[...]

  • Page 22

    22 Model s 660 – 688 a d e a c bc b e d A A A A A 33 36 37 34 12 6 2 3 2 3 8 12 5 7 13 17 16 1 16 1 40 26 39 5 16 1 26 27 12 5 16 1 17 16 1 26 17 12 5 18 19 27 12 5 31 A 10 4 30 15 41 25 25 41 21 22 20 9 10 15 4 14 10 15 21 22 20 3 24 24 41 10 15 42 A. B. 42 10 15 A. Models with a 46-inch Deck B. Models with a 38- or 42-inch Deck 41 29 28 11 35 3[...]

  • Page 23

    23 Models 660 – 688 REF . NO . PA R T NO . DESCRIPTION 1 710-0148 Screw, #8-32 x .375 2 710-0599 Self-tapping Screw, 1/4-20 x .5 3 710-0726 Self-tapping Screw, 5/16-12 x .75 4 710-1237 Screw , #10-32 x .625 5 710-1314A Sock et Cap Screw , 5/16-18 x .625 6 710-1315 Self-tapping Screw , 3/8-16 x 1.25 7 751-0813 LH Exhaust Pipe 8 721-0460 Exhaust Ga[...]

  • Page 24

    24 Model s 660 – 688 MTD LLC, P.O. BOX 361131 CLEVELAND, OHIO 44136-9722[...]