Yard-Man 979T Manuel utilisateur
21” Self Starter
Self Propelled
Mower
Model 979T
Operator’s Manual
PRINTED IN U.S.A.
FORM NO.
770-10455.fm
(1/2001)
IMPORTANT: READ SAFETY RULES AND INSTRUCTIONS CAREFULLY
MTD PRODUCTS INC. P.O. BOX 368022 CLEVELAND, OHIO 44136-9722
Warning: This unit is equipped with an internal combustion engine and should not be used on or near any unimproved forest-
covered, brush-covered or grass-covered land unless the engine’s exhaust system is equipped with a spark arrester meeting
applicable local or state laws (if any). If a spark arrester is used, it should be maintained in effective working order by the operator.
In the State of California the above is required by law (Section 4442 of the California Public Resources Code). Other states may have
similar laws. Federal laws apply on federal lands. A spark arrester for the muffler is available through your nearest engine authorized
service dealer or contact the service department, P.O. Box 368022 Cleveland, Ohio 44136-9722.
20
SECTION 10: ILLUSTRATED PARTS LIST MODEL 979T
Transmission and Pulley
For Reference Only
41
40
19 21
17 36 65
24
34
18
32 26 28
13 35
12 47
A22
23
27
16
25
31
26
33
30
15
14
28
26
20
11
29
60
51
58
64
38
7
55
56
59
61
16 25 31
39 37
73 612
4
51
6
362
44
Pulley Assembly For
Reference Only
45 49
45
46
47
48
43
42
48
43
9
5
4
5
4
74
78
80
77
79
75
76
68
68
67
69
70
9810 8
61
54 53 50
52
72
2
66
21
Model 979T
Ref.
No. Part No. Part Description
1. 710-0134 Carriage Screw 1/4-20 x .62
2. 710-0654A Scr. TT:3/8-18:1.00
3. 710-0703 Scr. 1/4-20 x .750
4. 712-0397 Wing Nut 1/4-20
5. 723-0233 Nut, Push .25 I.D. x .50 O.D.
6. 736-0204 Wash. Fl. .334 I.D.x .62 x.03
7. 782-0046B Deck - 21”
8. 710-0653 Scr. TT. 1/4-20 x .375
9. 710-0969 Scr. HL. 1/2-14 x .750
10. 731-1828 Baffle
11. 638-0012 Rear Axle Ass’y
12. 682-0531 Pivot Arm Ass’y
13. 682-7526 Trans. Axle Ass’y
14. 682-7528 Chain Cover Ass’y
15. 710-0653 Scr. TT 1/4-20 x .375
16. 710-0751 Cap Screw HH 1/4-20 x .620
17. 710-0896 Scr. AB 1/4-14 x .625
18. 710-1315 Scr. 3/8 116 x .25
19. 711-0835 Clevis Pin .50 Dia. x 4.82 Lg.
20. 713-0453 Chain-Endls. #48 .500P x 24L
21. 714-0474 Cotter Pin .125O.D. x .75
22. 720-0223 Grip
23. 732-0803A Spring Lever
24. 732-0832 Torsion Spring
25. 736-0270 Bell Wash. .285 x .75 x .082
26. 736-0369 Fl. Wash..508 I.D. 1.000 x.020
27. 738-0529 Nut Shld. .825 Dia. x .165 Lg.
28. 741-0324 Hx.Flg. Brg..506 I.D. x .590 L.
29. 741-0522 Hx.Flg. Brg. .506 I.D. x.715 L.
30. 741-0978 Hx. Slv. Brg..504 I.D. x .830 L.
31. 748-0318 Wheel Rachet
32. 750-0151 Spa. .550 I.D. x /750 O.D.
33. 750-0515 Spa. .51 .D. x .70 O.D. x 38 L.
34. 750-0807 Spa. .385 x .624 x .700
35. 750-1056 Shld. Spa. .385 I.D. X .715 Lg.
36. 782-0568 Brkt. - Ht. Adj. Spring
37. 682-3052 Handle Brkt. Ass’y. R.H.
38. 682-3053 Handle Brkt. Ass’y. L.H.
39. 710-1348 Scr. AB 1/4-14 x .500
40. 731-1901 Trail Shield
41. 732-0842 Trail Shield Wire
42. 611-0064 Fr. Axle Ass’y.
43. 710-1241 Hx Scr. Wash Hd. Hi.-Lo.
44. 710-1242 Scr. Torx, Truss Hi.-Lo.
45. 714-0104 Cotter Pin .072 x 1.12 Lg.
46. 731-1829 Fr. Axle Cover, Yellow
47. 736-0286 Bowed Washer
48. 741-0492A Bush. Block .505 Dia. x .62
49. 782-0565 Control Arm
50. 734-1978 Wheel 8 x 2 Link, Yellow
51. 734-1981A Wheel 9 x 2 Link Yellow, Slv.
52. 736-0105 Spr. Wash. .401 x .870 x .063
53. 736-0504 Wave Wash .510 x .750 x .017
54. 738-0102 Shldr Scr .498 x 1.445 x3/8-16
55. 10622B Spring, Ratchet, Plastic
56. 748-0381 Pawl - R.H.
—748-0188B Pawl - L.H. (Not Illustrated)
58. 16855 Ratchet Pawl Plate
59. 738-0137A Scr. Shld. .340 x .285
60. 712-0414 Top Lock Tab Weld Nut 1/4-20
61. 731-1426 Hubcap -Yellow
64. 725-0157 Cable Tie
65. 710-0604A Hex Scr. 5/16-18
66. 754-0460 V-Belt
67. 742-0741 21” Mulching Blade
68. 753-0609 Blade Adapter Kit
69. 736-0524A Blade Bell Suport
70. 710-1257 Hex Bolt 3/8-24 x 2.5”Lg.
72. 735-0639 Spark Plug Insulator
73. 731-1832 Side Discharge Chute
74. 731-1833 Mulch Cover
75. 631-0066 Rear Chute Ass’y w/ Door
76. 731-1713B Discharge Chute
77. 747-0965 Pivot Rod
78. 732-0819 Torsion Spring
79. 726-0111 Push Cap
80. 731-1874 Chute Door
Ref.
No. Part No. Part Description
22
Model 979T
27
A
A
9
13
10
14 15
7
11
8
37
26
25
4
3
6
5
34
28
5
3
35
36 30
32
38 2
39
33
38
2
31
1
12
16
24
22
19 23 2017
21
18
23
Model 979T
Ref.
No. Part No. Part Description
1. 710-1174 Bolt Cur. Carr. 5/16-18 x 2.0
2. 714-0104 Cotter Pin .072 x 1.12 Lg.
3. 720-0241 Knob Ass’y Wingnut 5/16-18
4. 726-0240 Cable Tie
5. 736-0451 Wash. Sad. .320 ID x.830 OD
6. 712-0429 Hex Nut 5/16
7. 731-2532 Control Cover LH
8731-2533 Control Cover RH
9720-0428 Button
10 715-0168 Pin
11. 782-0156 Lever
12 710-1256 Hi-Low Screw
13. 732-1171 Compression Spring
14. 716-0209 Retaining Ring
15. 732-1172 Torsion Spring
16. 731-0904A Upper Control Housing
17. 731-0924 6 Speed Shift Lever
18. 713-0397 Gear Insert
19. 710-1667A C Sunk Tap Screw #10 x .75 L
20. 732-0627 Shift Lever Spring
21. 16864 6 Spd. Rack Cable Brkt.
22. 731-0905A Lower Control Housing
23. 731-0906 Cable Mounting Cap
24. 731-0620 Control Lever
25. 746-0939 6 Spd. Cable
26. 746-0711A S.P. Cable
27. 647-0058 Control Handle
28. 720-0294 Foam Grip (2 Reqd.)
29. 749-1405 Upper Handle
30. 749-0907A Lower Handle
31. 631-0071 Grassbag Cover w/Label
32. 747-0939 Pivot Rod
33. 726-0106 Cap Nut
34. 747-0937 Frame - Grassbag
35. 747-0940A Rod, Support w/ Rope Guide
36. 664-0074 Grassbag
37. 746-1141 Control Cable 58.25”
38. 712-0397 Wing Nut
39. 710-0703 Carriage Bolt 1/4-20
Ref.
No. Part No. Part Description
24
Model 979T
15
2
8
1
4
11
3
13
10
12
17
18
5
7
16
14
6
9
19
25
Model 979T
Ref.
No. Part No. Part Description
1. 746-0939 6 Spd. Cable
2. 656-0613 Pulley Ass’y Multi- Spd.
3. 710-0167 Scr. 1/4-20 x .50 Carr.
4. 710-0896 Scr. AB 1/4-14 x .625 Hxinwsh
5. 711-1114 Pivot Shaft
6. 712-3006 Nut 1/4-20
7. 732-0807 Torsion Spring LH
8. 736-0270 Bell Wash. .265 X .75 X .062
9. 736-0329 Lock Wash. 1/4 Reg Duty
10. 736-0526 Wave Wash. 1.38 x .88 x .029
11. 738-0924 Shld.Scr. .375 x1/4-14AB
12. 750-1070 Slev Spcr .88 IDx1.00 OD x.48
13. 750-1071 Slev Spcr .88ID x1.13ID x .12
14. 756-0625 Roller Cable
15. 782-7574A 6 Spd. Cable Adj. Bracket
16. 782-7575A 6 Spd. Cable Mt. Bracket
17. 782-7596 6 Sp. Control Arm
18. 782-7597 6 Sp. Pivot Bracket
19. 712-0138 Hex Nut 1/4-28
26
Model 979T
34
27
Model 979T
Ref.
No. Part No. Part Description
1. 712-3025 Hex Jam Nut 5/16-24
2. 736-0425 Bell Washer .325 x .930
3. 756-0656 Pulley
4. 736-3084 Flat Washer .510 x 1.120
5. 712-0896 Hex Jam Nut 1/4-28
6. 782-7598 Belt Keeper
7. 741-0600 Bearing
8. 750-1050 Flange Spacer
9. 682-0027A Idler Bracket Assembly
10. 710-0299 Hex Cap Screw 1/4-28x 1.0
11. 732-0849A Extension Spring
12. 741-0682A Bearing Sleeve
13. 736-0570 Flat Washer .885 x 1.45
14. 721-0329 Oil Seal
15. 618-0253 Upper Housing Assembly
16. 736-0616 Thrust Washer .504 x .70
17. 717-1487 Pinion Shaft 10T
18. 736-0314 Thrust Washer 3/8 x .70
19. 736-0569 Thrust Washer .388 x .625
20. 618-0252 Lower Housing Assembly
21. 710-0642 Hex Screw 1/2-20 x .75
22. 782-7601A Cable Bracket
23. 741-0674 Bearing
24. 611-0066 Shaft Assembly
25. 721-0325 Plug
26. 717-1469 Gear 34T
27. 711-1168 Output Shaft 6T
28. 741-0673 Flange Bearing
29. 721-0329 Oil Seal
30. 782-7595 Pivot Bracket
31. 741-0324 Flange Bearing
32. 736-0369 Flat Washer .508 ID x 1.0
33. 741-0690 Bearing
34. 618-0263A Transmission Assembly
Complete
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