MTD 660 Series Setup guide

FORM NO.
769-00642B.fm
(10/24/2003)
PRINTED IN U.S.A.
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

2
Models 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
323
28
33
†Found on Models 660 & 680 Only
‡Found on Models 665 & 685 Only
20‡
22
25
29
24
26
34

3
Models 660, 665, 680 & 685
REF.
NO. PART 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
14 725-0963 Headlamp, 12V
15 725-1649 Headlamp Socket
16 731-1097F Grille
17 725-1396 Ignition Switch, 6-pin
18 725-0201 Keys (pair)
19 710-0751 Hex Screw, 1/4-20 x .620
20 783-0150B RH Side Panel
21 783-0151B LH Side Panel
22 17632D Support Bracket
23 710-0599 Self-tapping Screw, 1/4-20 x .5
24 710-0607 Self-tapping Screw, 5/16-18 x .5
25 710-0788 Self-tapping Screw, 1/4-20 x 1.0
26 726-3054 U-type Speed Nut, 1/4-20
27 731-04179 Dash Panel (models w/o choke knob)
731-04082 Dash Panel (models w/ choke knob)
28 746-04020A Throttle / Choke Control, 18.5”
746-04023A Throttle Control, 35.5”
746-04030A Throttle Control, 18.5”
29 736-3090 Flat Washer, .260 x .720 x .060
30 726-0230 Cable Tie, 34.75
31 751-0555B Fuel Tank, 1.5 gal.
32 751-0603 Fuel Tank Cap
33 746-0614A Choke Control, 38”
746-0616A Choke Control, 23”
34 731-0954 Steering Bellow, 4.75”
NOTE: Tractor features vary by model. NOT all parts listed above and pictured on the previous page are standard equipment.

4
Models 662, 663, 682 & 683
B
A
A
B
†Found on Models 662 & 682 Only
‡Found on Models 663 & 683 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

5
NOTE: Tractor features vary by model. NOT all parts listed above and pictured on the previous page are standard equipment.
Models 662, 663, 682 & 683
REF.
NO. PART 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 Shoulder Screw, 1/4-20 x .375 /.125
15 749-0722C Grille Support Rod
16 783-0156B Grille
17 783-0250A Hood w/ Louvers
18 783-0366 RH Side Panel (Insert)
19 783-0367 LH Side Panel (Insert)
20 783-0150B RH Side Panel
21 783-0367 LH Side Panel
22 725-1396 Ignition Switch, 6-pin
23 725-0201 Keys (pair)
24 746-0614A Choke Control, 38”
746-0616A Choke Control, 23”
25 17632D Battery Support Bracket
26 710-0599 Self-tapping Screw, 1/4-20 x .5
27 710-0607 Self-tapping Screw, 5/16-18 x .5
28 710-0788 Self-tapping Screw, 1/4-20 x 1.0
29 726-3054 U-type Speed Nut, 1/4-20
30 731-04179 Dash Panel (models w/o choke knob)
731-04082 Dash Panel (models w/ choke knob)
31 746-04020A Throttle / Choke Control, 18.5”
746-04023A Throttle Control, 35.5”
746-04030A Throttle Control, 18.5”
32 736-3090 Flat Washer, .260 x .720 x .060
33 726-0209 Cable Tie, 30.66
34 751-0555B Fuel Tank, 1.5 gal.
35 751-0603 Fuel Tank Cap
36 731-0954 Steering Bellow, 4.75”

6
Models 668 & 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
78
23
6
28
29
31

7
NOTE: Tractor features vary by model. NOT all parts listed above and pictured on the previous page are standard equipment.
Models 668 & 688
REF.
NO. PART 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
13 712-3027 Flange Lock Nut, 1/4-20
14 725-0963 Headlamp, 12V
15 725-1649 Headlamp Socket
16 731-1854A Headlight Lens (8-style)
17 735-0126 Rubber Washer, .87 x .33
18 725-0201 Keys (pair)
19 736-0300 Flat Washer, .406 x .875 x .059
20 736-3039 Flat Washer, .406 x 1.5 x 11 gauge
21 736-3078 Flat Washer, .344 x 1.0 x .063
22 783-0475B LH Side Panel
23 783-0476C RH Side Panel
24 783-0477A Grille
25 783-0478B Hood
26 783-0553A Hood Support Bracket
27 783-1495 Hood Side Bracket
28 17632D Battery Support Bracket
29 710-0607 Self-tapping Screw, 5/16-18 x .5
30 710-0788 Self-tapping Screw, 1/4-20 x 1.0
31 726-3054 U-type Speed Nut, 1/4-20
32 731-04180 Dash Panel (models w/o choke knob)
731-04080A Dash Panel (models w/ choke knob)
33 736-3090 Flat Washer, .260 x .720 x .060
34 746-0614A Choke Control, 38”
746-0616A Choke Control, 23”
35 746-04020A Throttle / Choke Control, 18.5”
746-04023A Throttle Control, 35.5”
746-04030A Throttle Control, 18.5”
36 726-0209 Cable Tie, 30.66
37 751-0555B Fuel Tank, 1.5 gal.
38 751-0603 Fuel Tank Cap
39 725-1396 Ignition Switch, 6-pin

8
Models 660 – 688
21
4
19
35
24
37
3
22
1
11
25
13
17
27
20
11
33
29
6
10
814
9
31
11
32
30710
534
42
12 41
38
12
18
44
28
39
43
12
16
36
2
36
16
26
15
23
40

9
Models 660 – 688
REF.
NO. PART 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-tapping 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, 7/16-20 (Grade 2)
9 712-0262 Jam Nut, 3/8-24
10 712-0431 Flange Lock Nut, 3/8-16
11 712-3004A Flange Lock Nut, 5/16-18
12 714-0470 Cotter Pin, 1/8 x 1.25
13 717-1757A Stearing Segment Gear
14 723-0448A Ball Joint, 7/16 -20
15 726-0214 Push Cap, .625
16 731-04057A Axle End Cap, Standard
17 736-0187 Flat Washer, .64 x 1.24 x .060
18 731-2290A Deluxe Hub Cap
19 736-0242 Bell Washer, .34 x .872 x .060
20 736-0356 Bell Washer, .391 x .380 x .062
21 731-04039 Steering Wheel Cap, Small
731-04040 Steering Wheel Cap w/ Sprig, Small
22 738-0141 Shoulder Screw, .435 x .350, 5/16-18
23 738-0527 Shoulder Screw, .498 x 2.045
24 738-0919 Steering Shaft, 21.86
25 741-0475 Plastic Bushing, .38 ID
NOTE: Tractor features vary by model. NOT all parts listed above and pictured on the previous page are standard equipment.
26 741-0487A Flange Bushing, .632 ID
27 741-0656 Hex Flange Bearing, 5/8
28 747-04008 Tie Rod, Non-adjustable
29 747-1268B Steering Drag Link, 7/16-20
30 748-0389 Cap, 1.25 x .16
31 748-04014B Steering Arm
32 748-04020 Spacer, 1.0 x .645 x .56
33 750-0535 Spacer, .380 x .625 x .21
34 783-0041D Pivot Bar Bracket
35 631-04028 Steering Wheel, Three Spoke
631-04008 Steering Wheel, Three Spoke Soft Grip
36 731-04058 Axle End Cap, w/ Fitting
37 731-04064 Steering Wheel Cap, Large
731-04065 Steering Wheel Cap w/ Sprig, Large
38 634-0056A Round Shoulder Wheel Ass’y Complete
634-0105A Square Shoulder Wheel Ass’y Complete
634-0115 Square Shoulder Wheel Ass’y Complete
39 683-04016 RH Axle Assembly
683-04015 LH Axle Assembly
683-04014 RH Axle Ass’y (models with 46-in Deck)
683-04013 LH Axle Ass’y (models with 46-in Deck)
40 731-0484A Hub Cap
41 736-0162 Flat Washer, .64 x 1.0 x .12
42 736-0285 Flat Washer, .635 x 1.589 x .06
43 747-04057 Tie Rod, Adjustable
44 711-04059 Ferrule, 3/8-24 x .437 Dia
REF.
NO. PART NO. DESCRIPTION
Wheel Ass’y
Complete Rim Assembly Inner Bearing Outer Bearing Tire Only Air Valve
Round Shoulder 634-0056A 634-0172 741-0706
(Flange w/ Fitting) 741-0487A (Plastic Flange) 734-0864 (15 x 6 x 6) 734-0255
Square Shoulder 634-0105A 634-0172 741-0706
(Flange w/ Fitting) 741-0487A (Plastic Flange) 734-1731 (15 x 6 x 6) 734-0255
Square Shoulder 634-0115 634-0051 741-0569
(Ball Bearing) 741-0569 (Ball Bearing) 734-1731 (15 x 6 x 6) 734-0255
Round ShoulderSquare Shoulder

10
Models 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
1718
32**
34
18
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 rear
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.
35
36
37
39
40
Models with Knob-adjust Seat
38 29
Models with
Quick-adjust Seat
41
42
44
46
45
47
19
48
49
50
51
52
53
43

11
Models 660 – 688
REF.
NO. PART 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-tapping Screw, #8-18 x .50
5 710-0726 Self-tapping 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 Switch
9 726-0278 Insulator Plate Boss
10 726-0279 Insulator Plate
11 732-0581B Extension Spring, .75 x 5.31
12 738-0296 Shoulder Screw, .437 x .286
13 17770H Running Board
14 17870C Fender
15 710-0751 Hex Screw, 1/4-20 x .620
16 710-1208 Self-tapping Screw, 5/16-18 x 3.5
17 710-3008 Hex Screw, 5/16-18 x .75
18 712-0429 Nylon Lock Nut, 5/16-18
19 712-3027 Flange Lock Nut, 1/4-20
20 732-04038 Compression Spring, 1.314 x 1.8
21 750-04212 Spacer
22 783-04139A LH Running Board
23 710-0599 Self-tapping Screw, 1/4-20 x .5
24 725-1643 Spring Switch, Long
25 726-0320 Insulator Nut Plate
26 726-3054 U-Clip Nut, 1/4-20
27 783-04060A Shift Cover Panel, 6-speed
783-04050A Shift Cover Panel, 8-speed
28 710-0870 Screw, 3/8-16 x .625
29 738-04012 Shoulder Screw, .625 x .175, 3/8-16
30 783-04081A Seat Pivot Bracket, Manual Adjust
31 710-0167 Carriage Screw, 1/4-20 x .50
32 761-0168B Blade Spindle Brake Assembly
33 723-04012 LH Abrasive Foot Pad
34 723-0422C RH Abrasive Foot Pad
35 735-04009 LH Rubber Foot Pad
36 735-0689A RH Rubber Foot Pad CORRECTED
37 726-3046
Ratchet Clip, .250 Dia
38 720-04009 Knob, 3/8-16 X .625
39 736-0219 Bell Washer, .389 x 1.120 x .030
40 757-04021 Low Back Seat, Black
757-04020 Medium Back Seat, Black
41 731-04074 Spacer
42 712-0137A Shoulder Screw, .340 x .285, 1/4- 20
43 783-0738A Seat Pivot Bracket, Quick-Adjust
44 736-0204 Flat Washer, .344 x .62
45 783-0753 Seat Select Bracket
46 783-0739 Seat Adjustment Lever
47 736-0175 Spring Washer
48 736-3019 Flat Washer, .531 x 1.062 x .134
49 738-0966 Shoulder Screw, .50 x .925, 3/8-16
50 783-0611 Seat Stop
51 710-1268 Screw, #10-16 x .375
52 732-0499 Compression Spring
53 720-0309A Grip
54 732-0735 Compression Spring, 1.314 x 2.55
REF.
NO. PART NO. DESCRIPTION
NOTE: Tractor features vary by model. NOT all parts listed above and pictured on the previous page are standard equipment.

12
Models 660 – 688
62
55 69
33
68
57
71
35
67
12
13 4913
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 6330
9
19
6330
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
* Attach the ends of springs (Ref. 58 & Ref.59)
to the notch openings in the rear of Ref. 25.
** Found on tractor models with 46-inch deck only.
*** Used on tractor models with Deluxe hub cap only.
E
†
†
Refer to E
†
on Page 18 & Page 20
75**
75**
76**
78**
77**
F
‡
‡
Refer to F
‡
on Page 20
61
8
79
80***
13
11
82
82

13
Models 660 – 688
REF.
NO. PART 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-tapping Screw, 1/4-20 x .5
8 710-0627 Hex Cap Screw, 5/16-24 x .75
9 710-0642 Self-tapping Screw, 1/4-20 x .75
10 710-0726 Self-tapping Screw, 5/16-12 x .75
11 710-3180 Hex Cap Screw, 5/16-18 x 1.75
12 710-3008 Hex Screw, 5/16-18 x .75
13 712-0429 Lock Nut, 5/16-18
14 712-3006 Hex Nut, 1/4-20
15 716-0106A E-Ring, .625 Dia Shaft
16 720-0233 Handle Grip
17 732-0369 Compression Spring, .55 x 1.37
18 732-0750A Switch Actuator Spring
19 736-0222 External Lock Washer, 1/4
20 736-0329 Lock Washer, 1/4
21 741-0487A Flange Bearing, .632 ID
22 747-04031 Battery Hold-down Rod
23 748-04011A Lift Shaft Connector
24 783-0345 Battery Tray
25 783-0355D Hitch Plate
26 783-04011A Lower Frame
27 783-04031 LH Upper Frame Side Panel
28 783-04032 RH Upper Frame Side Panel
29 783-04213 Deck Anti-sway Bracket
30 725-04039 Screw-mount Interlock Switch
31 683-04048A Stabilizer Shaft Assembly
32 711-04036 Ferrule, 1/2-20 x .50
33 711-04075A Ferrule, 3/8-24 x .375
34 712-0130 Lock Nut, 3/8-16
35 714-04023 Internal Cotter Pin, .080 x 1.56
36 732-04050A Extension Spring, 1.07 x 9.52
37 736-0219 Bell Washer, .389 x 1.12 x .030
38 736-0267 Flat Washer, .385 x .87 x .060
39 738-0322 Shoulder Bolt, .625 x .217
40 747-04018A Deck Hanger Link
41 747-04040A Deck Disengagement Rod
42 747-04069A Deck Hanger Link
43 747-04115A Stabilizer Rod (46-inch Decks)
747-04157 Stabilizer Rod (38- and 42-inch Decks)
44 748-04307 Lift Link
45 783-04093 Stabilizer Bracket (46-inch Decks)
783-04294 Stabilizer Bracket (38- and 42-inch Decks)
46 783-04113 Deck Lift Index Bracket
47 17630A Shift Lever Retainer
48 17840 Transaxle Mounting Bracket
49 17860 Pedal Mounting Bracket
50 725-1426 Solenoid
51 710-0176 Hex Cap Screw, 5/16-18 x 2.75
52 710-0809 Self-tapping Screw, 1/4-20 x 1.25
53 712-0271 Hex Sems Nut, 1/4-20
54 710-3015 Hex Screw,1/4-20 x .75
55 714-0111 Cotter Pin, 1.0
56 732-04029 Extension Spring, .59 x 12.38
57 783-04059 Speed Select Lever
58 732-04075A Extension Spring, .73 x 12.54
59 732-04076 Extension Spring, 1.15 x 7.90
60 732-0722A Brake Return Spring
61 736-0242 Bell Washer, .34 x .872 x .060
62 747-04043 Variable Speed Control Rod
63 750-0566A Spacer, .260 x .372 x 1.030
64 683-04005A Clutch / Brake Pedal Assembly
65 735-0196 Foot Pad, 4.6
66 750-0802 Spacer, .640 x .76 x 2.63
67 720-04008 Shift Handle Grip
68 732-04017 Compression Spring, .89 x 1.75
69 736-0300 Flat Washer, .406 x .875 x .059
70 747-04039 Speed Control Rod
71 750-04080 Spacer, .640 x 1.0 x .78
72 725-1706A Battery, 270 CCA
725-1737A Battery, 190 CCA
73 712-3027 Flange Lock Nut, 1/4-20
74 711-0993 Belt Guard Pin, 1/4-20
75 749-0334 Spacer
76 710-1266 Hex Cap Screw, 5/16-18 x 3.25
77 710-0833 Hex Cap Screw, 5/16-18 x 5.25
78 748-04021A Shoulder Spacer
79 731-2290A Deluxe Hub Cap
80 736-0430 Flat Washer, .350 x 1.59 x .062
81 734-1675 Round Shoulder Wheel Ass’y Complete
634-0104 Square Shoulder Wheel Ass’y Complete
82 748-04037 Spacer, .635 x 1.0 x .696
REF.
NO. PART NO. DESCRIPTION
NOTE: Tractor features vary by model. NOT all parts listed above and pictured on the previous page are standard equipment.
* See illustartion on Page 3
Wheel Ass’y
Complete Rim Assembly Tire Only Air Valve
Round Shoulder* 734-1675 634-0070 734-1596
(20 x 8 x 8) 734-0255
Square Shoulder* 634-0104 634-0070 734-1730
(20 x 8 x 8) 734-0255

14
Models 660 – 688
27
18
29
31
26
32
28
30
12
24
23
2
16
25
1
A
B
BA
14
21
7
10 4
6
20
15
17
8
13
22
6
19
519
11
10
9
11
3
33

15
Models 660 – 688
REF.
NO. PART 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 Lock Nut, 1/4-20
14 714-0209 Internal Cotter Pin, .125
15 718-04012 Bearing Cup
16 718-0758A Pulley Hub, 5/8 Spline
17 736-0362 Flat Washer, .320 x 1.25 x .06
18 720-04028 Shift Knob
19 738-0372B Shoulder Spacer, 1.0 x .38 x .38
20 741-0600 Ball Bearing, 17 x 40 x 12
21 747-04072 Shift Rod
22 750-04099 Stepped Spacer
23 754-04001A Lower Drive Belt
24 754-04002 Upper Drive Belt
25 756-04002 Transmission Pulley, 7.25
26 710-0599 Self-tapping Screw, 1/4-20 x .5
27 647-04019 Shift Lever Assembly
28 711-0736 Ferrule, 1/4-20 x 1.0
29 714-0104 Cotter Pin, 1.13
30 714-0470 Cotter Pin, 1.25
31 732-04067 Spring Compression Clip
32 736-0275 Flat Washer, .344 x .688 x .065
33 17630A Shift Lever Retainer
NOTE: Tractor features vary by model. NOT all parts listed above and pictured on the previous page are standard equipment.

16
Models 660 – 688
8
3
2
1
5
6
8
4
10 9
7
1211
1112
13
14
3
17
15
16
18
19
20
21
22
23
24
25
28
29 27 26

17
Models 660 – 688
NOTE: If rebuilding the upper housing, include two ounces (2 oz.) of Unirex®N3 grease (Part No. 737-0289) in the input shaft cavity.
REF.
NO. PART 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, .75 x .1.0 x 1.0
12 721-0338 Seal, .75 x 1.0 x .125
13 618-04041 Differential Assembly
14 741-0336 Flange Bearing, 5/8 x 3/4 x 3/4
15 717-1362 42-tooth Bevel Gear
16 717-1363 42-tooth Bevel Gear
17 718-0228 Clutch Collar
18 736-0519 Flat Washer, .70 x 1.125 x .031
19 711-04053 Drive Shaft
20 736-0495 Thrust Washer, 1.0 x .632 x .0
21 741-0337 Flange Bearing, 5/8 x 3/4 x 15/16
22 611-0011 Detent Shaft Assembly
23 741-0862 Detent Ball
24 732-0863 Compression Spring
25 719-04018 Lower Housing
26 717-0678 Brake Puck
27 761-0202 Brake Disc
28 710-1206 Self-tapping Screw, 1/4-20 x 2.375
29 661-0001 Brake Assembly
— 737-0148 Grease (19 oz.)
*Use applicable flat washer (12a, 12b or 12c) in this application allowing .0150/.0020 in. end-play

18
Models 660 – 688
†
Refer to E
†
on Page 12
19
18
17
16
24
21
3
(b)(c)
11
11
10
E
†
1
2
97
12
15
14
13 20
8
8
6
6
25
22
23
4
5
3

19
Models 660 – 688
REF.
NO. PART 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-sway Rod
10 754-0329A Deck Belt (a)
754-0371A Deck Belt (b) (c)
11 783-04148A Belt Cover (a)
783-04149B Belt Cover (b) (c)
12 783-04211 Anti-sway Stabilizer Bracket
13 712-0431 Flange Lock Nut, 3/8-16 (c)
14 734-0973 Deck Wheel, 5 x 1.38 (c)
15 738-0373 Shoulder Screw, .498 x 1.53 (c)
16 731-1032B Discharge Chute Assembly
17 710-0751 Hex Cap Screw:1/4-20 x .620
18 736-0270 Bell Washer, .265 x .75 x .062
19 712-3006 Hex Nut, 1/4-20
20 726-0233 Push Nut, 1/4
21 712-3087 Wing Nut, 1/4-20
22 710-0599 Self-tapping Screw, 1/4-20 x .5
23 710-0134 Carriage Screw, , 1/4-20 x .62
24 731-2363 Mulch Plug
25 783-1146A Deck Skirt (b) (c)
IMPORTANT: For a proper
working machine, use
Factory Approved Parts.
V-belts are designed to
engage and disengage
safely. A substitute (non
OEM) V-belt can be
dangerous by not
disengaging completely.
(a) Tractor models with 38-inch Deck Only
(b) Tractor models with 42-inch Deck Only
(c) Tractor models with 42-inch Deck w/ Deck Wheels Only
NOTE: Tractor features vary by model. NOT all parts listed above and pictured on the previous page are standard equipment.

20
Models 660 – 688
41
48
47
46
13
E
†
†
Refer to E
†
on Page 12
G
G
41
20
17
12
8
22 27
25
14
29
24
16
5
45 7
15
15
31
31
32
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 to F
‡
on Page 12