Troy-Bilt 521 Operator's Manual page 13

Models 521 & 721
REF. PART
NO. NO.
1 684-04027 Auger Ass'y 21" complete w/Solid Shaft
2 684-04028 Auger Housing Ass'y 21"
3 710-0134 Screw, 1/4-20 x .62
4 710-0167 Carriage Bolt 1/2-20 x .50 LG
5 710-0323 Truss Mach Scr 5/16-18 x .75
6 710-0352 Hex "B" Tap Scr. 1/4-14 x .375" LG
7 710-0597 Hex Screw 1/4-20 x 1.00 Gr. 5
8 710-0642 Hex Tap Scr. 1/4-20 x .75"
9 710-0896 Hex Screw AB:1/4-14 x 0.625"
10 710-1005 Hex Tap Scr. 1/4-14 x .50" LG.
11 712-0324 Hex Nut, 1/4-20 Nylon
12 712-3010 Hex Nut 5/16-18 hd. Gr. 5
13 712-3027 Hex Flange Nut, 1/4-20
14 726-0299 Push Cap x 1/2" Rod
15 731-1033 Shave Plate 2.66 x 19.88 Double
16 732-0357A Extension Spring .33 OD x 1.12 Lg.
17 736-0119 L-Wash 5/16 ID
18 736-0176 Flat Washer .265 ID x .938 OD x .120
19 736-0326 Flat Washer .510 ID x 1.00 OD x .125
20 736-0329 Lock Washer, 1/4
21 736-3090 Flat Washer .260 x .720 x .060
22 741-0600 Ball Bearing 17 x 40 x 12
23 741-0919 Ball Bearing
24 746-04091 Control Cable
25 748-0234 Shoulder Spacer .25 THK
26 749-04114 Lower Handle
27 750-04230 Flange Spacer
NOTE: For painted parts, please refer to the list of color
codes below. Please add the applicable color code,
wherever needed, to the part number to order a
replacement part. For instance, if a part numbered 700-
xxxx is painted powder black, the part number to order
would be 700-xxxx-0637.
Powder Black: 0637
DESCRIPTION
Red: 0638
REF. PART
NO. NO.
28 784-5174 Bearing Cup
29 790-00039 Idler Bracket w/Brake
30 790-00045 Belt Cover
31 790-00062 Belt Keeper
32 684-0178 Mitten Grip Bracket
33 684-04029 Shroud Ass'y, 5HP Black
34 710-0895 Screw, 1/4-15 x .75
35 710-1003 Hex Wash B-Tapp Scr #10-16 x .625" Lg.
36 710-1090 Hex Flange Screw, 5/16-18x 1.25
37 710-1882 Hex Flange Screw 5/16-18 x 1.50 Gr. 5
38 710-3083 Hex Screw, 5/16-18 x 1.375
39 712-0252 Hex Nut 5/8-32 x .12 Special
40 712-0429 Hex Nut, 5/16-18 Gr 5 Nylon
41 725-0201 Ignition Key
42 725-2018 Key Switch-Electric Start
43 736-0225 L-Washer Internal .625 ID x 1.058 OD
44 736-0400 Flat Washer .194" ID x .62" OD x .063
45 736-0451 Saddle Washer .320 ID x .93 OD
46 7519636 Recoil Handle, Mitten
47 710-0487 Carriage Bolt 5/16-18 x 2.0 Gr. 1
48 720-0284 Handle Knob Assembly 5/16-18
49 710-0157 Hex Screw 5/16-24 x .75 Gr. 5
50 710-0451 Carriage Bolt, 5/16-18 x.075 GR 1
51 747-04159 Gull Wing Bail
52 749-04106 Upper Handle, Gull Wing
53 734-04063 Wheel, 7 x 1.5 Star Gray
13
DESCRIPTION