MTD 551 Operator's Manual page 15

Model521Spindle Assembly
25
16
11
/
18
10
19
21
12
14
6
23
!
26
V-BELTS are specially designed to engage and
disengage safely. A substitute (non-OEM) V-Belt
can be dangerous by not disengaging completely.
REF.
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
PART
NO.
687-02019
710-0395
710-0599
710-1143A
711-1017
712-3004A
712-3027
712-3056
714-0104
718-04012
731-04158
731-04207
732-04169
736-0119
736-0187
DESCRIPTION
Blade Plate Assembly
Hex Screw, 5/16-18
Self-tapping Screw, 1/4-20
Hex Screw, 5/8-18
Clevis Pin
Hex Lock Nut, 5/16-18
Hex Flange Nut, 1/4-20
Jam Nut, 5/8-18
Cotter Pin
Bearing Cup
Blade Guard
Bearing Block
Compression Spring
Lock Washer
Flat Washer
REF. PART
NO. NO.
16 736-0317
17 736-3090
18 738-04025
19 741-0524
20 736-04088
21 750-04105
22 750-0547
23 754-04032
24 756-0449
25 781-0080
26 781-0427
27 787-01075
28 736-040881-
29 781-07481"
l-If so equipped
DESCRIPTION
Bell Washer,.63 ID x 1.20D
Flat Washer,.260 x.72
Pin, 1/4-20
Bearing,.625 ID x 1.57 OD
Flat Washer
Spacer,.63 x 1.12 x 1.06
Spacer,.632 ID x.875 OD
Belt
Sheave
Blade
Belt Guard
Cover Plate
Flat Washer
Tri Star Blade
15