Transmission Assembly - Cub Cadet SC 621 Operator's Manual

21-inch, 6-speed lawn mower
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Transmission Assembly

IMPORTANT: For a proper working machine, use
Factory Approved Parts.
V-BELTS are specially designed to engage and
disengage safely. A substitute (non OEM) V-Belt can be
dangerous by not disengaging completely.
5
6
8
9
10
25
15
26
23
1
2
3
2
4
7
11
22
14
24
12
13
31
30
29
28
33
16
17
18
19
20
21
Ref.
Part No.
No.
1
712-3025
2
736-0425
3
756-0656
4
736-3084
5
712-0896
6
782-7598
7
741-0600
8
750-1050
9
682-0027A
10
710-0299
11
732-0849A
12
741-0682A
13
736-0570
14
721-0329
15
618-0253
16
736-0616
17
717-1487
18
736-0314
19
736-0569
20
618-0252
21
710-0642
22
782-7601A
23
741-0674
24
611-0066
25
721-0325
26
717-1469
27
711-1168
28
741-0672
29
721-0329
27
30
782-7595
31
741-0324
32
32
736-0369
33
741-0690
NOTE: For painted parts, please refer to
the list of color codes below. Please add
the
applicable
needed, to the part number to order a
replacement part. For instance, if a part
numbered 700-xxxx is painted Cub Yellow,
the part number to order would be 700-
xxxx-0716.
22
Description
Hex Jam Nut, 5/16-24
Bell Wash. .325 x .930 x .045
Pulley
Fl. Wash. .510 x 1.120 x .060
Hex Jam Nut , 1/4-28
Belt Keeper
Bearing
Flange Spacer
Idler Bracket Assembly
Hex Cap Scr. 1/4-28 x 1.00 Gr. 5
Extension Spring
Bearing Sleeve
Fl. Wash. .885 x 1.145 x.030
Oil Seal
Upper Housing Assembly
Thrust Wash. .504 x .700 x .030
Pinion Shaft, 10 T.
Thr. Wash. 3/8 x .70 x .030
Thr. Wash. .388 x .625 x .062
Lower Housing Assembly
Hex Scr. 1/2-20 x .75
Cable Bracket
Bearing
Shaft Assembly
Plug
Gear 34 T.
Output Shaft, 6 T.
Flange Bearing
Oil Seal
Pivot Bracket
Flange Bearing
Flat Washer
Bearing
color
code,
wherever
Cub Yellow: 0716
Powder Black: 0637

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