Page 1
Sno-Thro®
Parts Manual
Models
939001 - ST520E
939002 - ST520
939300 - ST520
00582700 5/06
Printed in USA
Page 2
THE MANUAL
PRODUCT REGISTRATION
Before you operate your unit, carefully and completely
read manuals supplied with the unit. The contents will
provide you with an understanding of safety instructions
and controls during normal operation and maintenance.
For your safety and the safety of others always read,
understand, and follow all DANGER, WARNING, and
CAUTION messages found in manuals and on safety
decals.
Hardware descriptions are given in decimals.
Decimals to Fractions
.063 1/16 .563 9/16
.125 1/8 .625 5/8
.188 3/16 .688 11/16
.250 1/4 .750 3/4
.313 5/16 .813 13/16
.375 3/8 .875 7/8
.438 7/16 .938 15/16
.500 1/2 1.00 1
SERVICE AND REPLACEMENT PARTS
When ordering replacement parts or making service
inquiries, know the Model and Serial numbers of your
unit and engine.
Numbers are located on the product registration card in
the unit literature package. They are printed on a serial
number label, located on the frame of your unit.
• Record Unit Model and Serial numbers here:
The Ariens dealer must register the product at the time of
purchase. Registering the product will help the company
process warranty claims or contact you with the latest
service information. All claims meeting requirements
during the limited warranty period will be honored,
whether or not the product registration card is returned.
Keep a proof of purchase if you do not register your unit.
Customer Note: If Dealer does not register your product,
please fill out, sign and return the product registration
card to Ariens or go to www.ariens.com.
YOUR SATISFACTION IS IMPORTANT
Questions? Please follow these helpful steps:
1. Refer to the manuals supplied with your unit.
They will guide you through safe and proper
operation and maintenance.
They contain specifications on your unit.
If your questions are not answered in these manuals,
go to step number two.
2. Contact Your Dealer.
Our dealers will be happy to supply any service or
advice required to keep your unit operating at peak
efficiency.
A factory trained staff is available to support your
equipment needs. They stock genuine Ariens parts
and lubrican ts m anufa ctured with the sam e preci sion
and skill as the original.
If your questions are not resolved by the support
staff, ask for the manager or owner.
When contacting your Dealer supply your model and
serial numbers.
• Record Engine Model and Serial numbers here:
UNAUTHORIZED REPLACEMENT PARTS
Use only Ariens replacement parts. The replacement of
any part on this vehicle with anything other than an
Ariens authorized replacement part may adversely affect
the performance, durability, or safety of this unit and may
void the warranty. Ariens disclaims liability for any claims
or damages, whether warranty, property damage,
personal injury or death arising out of the use of
unauthorized replacement parts.
TO SPEED PARTS ORDERING:
1. Know the model and serial numbers of your unit.
2. Know the part number required.
3. Know the quantity required.
4. Know the part description.
2
Page 3
MODELS
Domestic
Model 939001 (520E)
5H.P. 20” Sno-Thro
Serial No. 000101 and up
Model 939002 (520)
5H.P. 20” Sno-Thro
Serial No. 000101 and up
TABLE OF CONTENTS
DECALS
Decals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
ENGINE AND DRIVE
Engine and Belt Drive . . . . . . . . . . . . . . . . . . . . . . . . 6
FRAME AND HOUSING
International
Model 939300 (520)
5H.P. 20” Sno-Thro
Serial No. 000101 and up
Handlebars and Controls . . . . . . . . . . . . . . . . . . . . . . 8
Auger and Chute . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Discharge Chute Crank . . . . . . . . . . . . . . . . . . . . . . 12
Gearcase and Impeller. . . . . . . . . . . . . . . . . . . . . . . 14
3
Page 4
Model 939001, 002, 300
DECALS - 520
5
08000020
1
2
3
4
08000015
Item Part No. Qty . Description
1 05305100 1 Decal, American Flag
2 08093901 1 Decal, Danger- Rotating Parts
3 08094000 1 Decal, Danger
4 08000038 1 Decal, Front Panel, ST520
5 08000020 1 Decal, Control Panel - Single Speed
PS0322
4
Page 5
NOTES
5
Page 6
Model 939001, 002, 300
8
ENGINE AND BELT DRIVE
26
18
24
7
25
8
4
6
2
42
3
5
30
3
5
21
3
27
6
20
5
43
23
44
12
19
31
53
9
1
Item Part No. Qty. Description
1 07100113 2 Tire/Wheel, 4.10-4
07100115 2 Tire, 2PR 4.10-4
07100116 AR Wheel
07100117 AR Tube
2 08200130 1 Engine, 5HP Tecumseh LH195SA 120V (001)
08200124 1 Engine, 5HP Tecumseh OH195SA Recoil (300)
08200123 1 Engine, 5HP Tecumseh LH195SA Recoil (002)
29
47
40
39
38
22
41
37
35
36
45
54
49
52
51
50
55
47
48
13
46
16
17
15
34
9
14
2
10
32
11
33
PS0330
6
Page 7
ENGINE AND BELT DRIVE
Item Part No. Qty. Description
3 06435700 3 Washer, Flat Steel .38 x .88 x .083
4 00498300 1 Belt Finger
5 06307400 3 Wash er, Locking .312 x .097
6 05947300 2 Bolt, Hex .31-24 x .75 Grade 5
7 00497200 1 Belt Cover
8 07412000 2 Screw, Tapping Hex Was her Head .25-20 x .50
9 06529700 3 Nut, Locking Center .25-20
10 00490700 1 Shaft, Axle
1 1 05952700 1 Bolt, Hex .25-20 x 2.25 Gra de 8
12 05521600 2 Bushing, Flange Hex .75 x .87 x .53 x 1.18
13 08300015 1 Spring, Torsion .067 x .88
14 00490500 1 Weldment, Attachment Idler Arm
15 05947500 1 Bolt-Hex .31-18X1.25 Grade 5
16 01213100 1 Bearing Spacer
17 02457400 1 Idler
18 07532000 AR Key, Push/Pull Tecumseh
19 06441400 2 Washer, Flat Steel .754 x 1.125 x .062
20 07200108 1 V Belt 4L-Section 34.63 EL
21 00279100 1 Sheave, Engine
22 00582100 1 Gear, 44 Tooth
23 07200109 1 V-Belt 3L-Section Stretch Fit
24 21533400 AR Plug, Spark (001, 002)
21533500 AR Plug, Spark (300)
25 07531800 AR Cap, Fuel
26 02483100 1 Cord, Extension 120 V (001)
27 05963600 1 Bolt, Hex .31-24 x 1.00 Grade 5
28 06543100 1 Nut, Locking Top Flange .31-18
29 07400010 4 Screw, Tapping .38-16 x 1.0 Hex Washer Head w/Vibra-Tite
30 00499500 1 Sheave, Drive
31 05953000 2 Bolt-Hex .25-20X1.75 Grade 8
32 05500037 1 Bushing, Sleeve .265 x .625 x .375
33 05717600 1 Ring, Retaining External .250 x .010
34 05500107 1 Bushing, Sleeve .513 x .748 x .475
35 06441100 1 Washer, Flat Steel .52 x .827 x .062
36 05500028 2 Bushing, Polyliner-.50 Snap-in 326-C
37 06400005 1 Washer, Wave .50 x .75 x .015 .13FRHT
38 00581500 1 Lever, Attachment Clutch
39 00499700 1 Transmission
40 05960900 3 Bolt, Hex .38-16 x 3.50 Grade 5
41 05800003 1 Pin, Groove .156 x .875 TYPE H LC
42 02411000 1 Belt Finger
43 06534800 3 Nut, Locking Flange .375-16
44 07412000 2 Screw, Tapping .25-20 x .50 Hex Washer Head Thread
45 00495251 1 Bracket, Mount Brake
46 00495300 1 Arm, Brake
47 06436200 4 Washer, Flat Steel .406 x .812 x .065
48 06529600 1 Nut, Locking Center .38-16
49 05958500 1 Bolt, Hex .38-16 x 1.75 Grade 5
50 06800001 2 Rivet, Pop .187 x .45 Dome Aluminum
51 00180500 1 Pad, Brake
52 05900030 1 Bolt, Shoulder .31 x .50 .25-20 x .438
53 06530100 1 Nut, Locking Flange .250-20
54 08300029 1 Spring, Tension .06 x .46 x 2.00
55 05500106 1 Bushing, Sleeve .385 x .500 x 1.045
Model 939001, 002, 300
7
Page 8
Model 939001, 002, 300
-HANDLEBARS AND CONTROLS
19
23
16
15
13
14
21
12
21
15
13
9
11
17
8
11
4
17
28
24
29
23
15
7
18
25
13
26
22
27
8
35
15
13
24
14
10
20
30
31
32
1
34
33
5
6
6
2
3
PS0350
8
Page 9
HANDLEBARS AND CONTROLS
Item Part No. Qty. Description
1 00490659 1 Frame
2 07412000 6 Screw, Tapping .25-20 x .50 Hex Washer Head Thread
3 00490859 1 Cover Bottom
4 53900100 1 Control Panel with Decal
5 00490951 1 Handlebar, Lower
6 07028500 4 Bolt Serrated Hex Flange Washer Head .38-16 x .75 Grade 5
7 07500005 4 Spacer, Handlebar
8 05717600 2 Ring, Retaining, External .25 x .010
9 00585951 1 Handlebar, Upper RH
10 00491051 1 Handlebar, Upper LH
11 06221600 4 Bolt, Round Head Square Neck .31-18 x 2.25
12 00398351 1 Paddle, Clutch - RH Compact
13 05500040 4 Bushing, .266 x 1.62 x .50
14 08300026 2 Spring, Torsion
15 00399300 4 Bushing, Flange
16 05961600 1 Bolt, Hex .25-20 x 2.50 Grade 5
17 06530900 2 Nut, Jam Nylon .250-20 With Nylon Locking Type Insert
18 06900034 1 Cable, Auger
19 00398151 1 Paddle, Clutch - LH Compact
20 06900035 1 Cable, Traction
21 06200009 4 Bolt, Round Head Square Extra Long Neck .31-18 x 1.50
22 06543100 4 Nut, Locking Top Flange .31-18
23 07518700 2 Handle Grip
24 00446700 2 Bumper Pad
25 06435700 4 Washer, Flat-Steel .38 x .875 x .083
26 06308600 4 Washer, Locking .31 x .078 Regular
27 06530200 4 Nut, Locking-Nylon .312-18
28 06437300 1 Washer, Flat Steel .281 x .62 x .065
29 00589800 1 Bushing, Sleeve .266 x .750 x .750
30 00373051 1 Bracket, Cable Pulley
31 07300012 1 Pulley, Cable
32 07000021 1 Bolt, Shoulder .375 x .375 x .25-20
33 06543500 1 Nut, Locking Top Flange .25-20
34 07412000 2 Screw, Tapping .25-20 x .50 Hex Washer Head Thread
35 05965300 1 Bolt, Hex .25-20 x 3.25
Model 939001, 002, 300
9
Page 10
Model 939001, 002, 300
AUGER AND CHUTE
20
19
18
21
18
8
17
12
26
2
3
4
5
6
7
8
9
10
11
12
25
24
1
23
13
22
13
14
15
16
PS0363
10
Page 11
AUGER AND CHUTE
Item Part No. Qty. Description
1 06529700 2 Nut, Locking Center .25-20
2 53214400 1 Chute, Discharge, Compact Snow
3 06220800 1 Bolt, Round Head Square Short Neck .31-18 x .75
4 00170200 1 Device, Snow Cleanout
5 06813600 2 Rivet-Pop .187 x .45 Stainless Steel Dome FBF64
6 00170300 1 Mount, Snow Cleanout
7 53214600 1 Blower Housing, 20"
8 07412000 6 Screw-Tapping .25-20 x .50
9 02483859 2 Runner, Double Flange
10 06529600 4 Nut, Locking Center .38-16
11 06435700 4 Washer, Flat Steel .38 x .88 x .08
12 05500012 2 Bushing-Flange, Nyliner .75” I.D.
13 00275200 2 Bushing, Rake Shaft .75”
14 53212300 1 Rake Right Hand 20” with Zerks (Includes Items 16)
53212400 1 Rake Left Hand 20” with Zerks (Includes Items 16)
15 53200500 2 Shear Bolt with Nut (Includes Items 1)
16 07061300 2 Zerk, Fitting .25 x .125
17 07412900 4 Screw, Tapping .38-16 x .50 Hex Washer Head
18 06437200 2 Washer, Flat Steel .34 x .69 x .065
19 06529800 1 Nut, Locking Center .31-18
20 01320200 1 Wave Washer
21 06416800 1 Washer, Plastic .39 x .88 x .06
22 06222000 5 Bolt, Round Head Square Neck .31-18 x .50 Grade 5
23 00396659 1 Scraper Blade 20” Compact
24 06437200 5 Washer, Flat Steel .344 x .688 x .065
25 06200004 4 Bolt, Round Head Square Short Neck .38-16 x .75
26 06529800 5 Nut, Locking Center .31-18
Model 939001, 002, 300
11
Page 12
Model 939001, 002, 300
1
2
DISCHARGE CHUTE CRANK
26
25
3
12
8
11
3
4
5
10
6
9
939001, 002
15
13
22
23
15
21
14
13
7
14
16
17
18
19
24
20
8
14
16
22
23
17
18
19
24
PS0373
12
Page 13
DISCHARGE CHUTE CRANK
Item Part No. Qty. Description
1 01019800 1 Cap, .38 Rod (300)
2 07500001 1 Knob, Chute Crank (300)
3 07412000 4 Screw, Hex Washer Head Self Tapping .25-20 x .50 (300)
4 03223000 1 Cover, Gear (300)
5 05500021 1 Bushing, Polyliner (300)
6 06714500 1 Pin, Spring Clip (300)
7 03222900 1 Gear, Chute (300)
8 06224400 1 Bolt, Round Head Square Neck .38-16 x 2.50 Grade 5
9 53214700 1 Bracket with Pinion Gear (Contains Items 5, 10, 11, 12) (300)
10 06400009 1 Washer, Thrust .625x 1.0 x .03 (300)
11 00443551 1 Bracket, Pinion Gear (300)
12 03224300 1 Push Nut (300)
13 06439300 1 Washer, Flat Steel .38 x 1.50 x .062
14 01123800 2 Friction Washer
15 00588051 1 Weldment, Chute Pedestal w/Crank (300)
00396751 1 Weldment, Pedestal Chute Mount (001, 002)
16 00398000 1 Friction Plate
17 08320900 1 Spring, Compression .19 x .56 x 1.62
18 06436200 1 Washer, Flat Steel .41 x .81 x .065
19 06529600 1 Nut, Locking Center .38-16
20 00427451 1 Handle, Chute Rotation (001, 002)
21 00345700 1 Grip, Chute Handle, Orange (001, 002)
22 05958500 2 Bolt, Hex .38-16 x 1.75
23 06308800 2 Wash er, Lock .38 x .094
24 06542000 2 Nut, Locking Top Flange .38-16
25 05500020 1 Bushing, Polyliner 322-C (300)
26 03247700 1 Rod, Chute Crank (300)
Model 939001, 002, 300
13
Page 14
Model 939001, 002, 300
GEAR CASE AND IMPELLER
24
29
30
1
27
25
26
7
4
5
20
9
21
28
2
6
Item Part No. Qty. Description
1 00187000 1 Pulley, 4L with Hub .75 x 8.50
2 00008000 1 Ariens 16 oz. Bottle of L2 Lube
3 05531200 1 Bushing, Sleeve .76 x 1.500 x .44
4 05600004 1 Seal, Oil .748 x 1.378 x .276
5 05804900 1 Pin, Groove .19 x 1.25 Type E
6 05803700 2 Pin, Roll .25 x 1.75
7 00426651 1 Weldment, Impeller 12" 3 Blade
8 06442500 1 Washer, Fiber .44 x .66 x .032
9 05511200 1 Bushing, Flange .75 x 1.00 x .75 x 1.25
10 00272100 1 Thrust Collar .75 I.D.
11 53212500 1 Shaft & Worm Gear Assembly
12 00291100 1 Gear Case Casting, Machined Left Hand
13 06609300 1 Key, Woodruff .19 x .63 x .25 SAE 61 Hardened
14 06439000 2 Washer, Flat Steel .81 x 1.50 x .14
15 07417000 1 Screw, Tapping .38-16 x .75 Rolok
16 00260500 1 Shaft, Rake 20"
17 05520600 1 Bushing, Flange .50 x 1.00 x .75
18 07412400 6 Screw, Tapping Hex Was her He ad .25-20 x 1.00
19 06441500 2 Washer, Flat Steel .755 x 1.375 x .062
20 00031700 1 Loctite Gasket 518
21 00291200 1 Gear Case Casting, Machined Right Hand
22 05531100 2 Bushing, Flange .75 x 1.13 x .50 x 1.50
23 53212600 1 Gear Case Assembly- 20" (contains 3-5,8-13,15-22,28)
24 06529700 3 Nut, Locking Center .25-20
25 01014200 1 Bearing Flange
26 05406300 1 Bearing, Ball .75 x 1.75 x .50
27 00428700 1 Bearing, Flange
28 05618900 2 Seal, Oil .75x 1.375x .250
29 05947300 1 Bolt, Hex .31-24 x .75 Grade 5
30 06307400 1 Wash er, Locking .312 x .097 Heavy
18
14
10
22
11
19
19
3
13
22
12
11
23
28
14
8
15
17
16
PS0381
14
Page 15
Ariens Company
655 West Ryan Street
P.O. Box 157
Brillion, WI 54110-0157
920-756-2141
Fax 920-756-2407
www.ariens.com
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