Ariens 924 User Manual

Obriens

▲ SAFETY MESSAGE A

The product for which you have requested
information or repiacement parts is not a
current product. The repiacement models
incorporate product designs, safety features,
safety instructions or warnings which repre
sent the latest “State Of The Art” develop

ments. For your safety and those around you
please contact your nearest Ariens/Gravely
Dealer for a demonstration of the current
product safety provisions and features.

Series

Sno-Thro®

Service

Manual

Ariens

A Message To Ariens Repair Manuai User

Your Ariens Dealer will be happy to supply any
service or advice which may be required to keep
your Ariens equipment operating at peak efficiency.

He stocks genuine Ariens parts and lubricants;
manufactured with the same precision and skill as
the original equipment. His factory trained staff is
kept well informed on the best methods of servicing
Ariens equipment and is ready and able to serve
you. If engine repair or service are required, they
can be obtained from an Ariens dealer or from an
authorized engine manufacturer's service center. If
service is required, be prepared to supply the service
person with the Model and Serial Numbers of the
equipment and engine, as well as a full description
of the problem encountered.

The information contained herein is intended for

use by Ariens Dealers' trained servicemen and serves

Introduction

How To Use Your Service Manual
This Ariens Service manual is arranged for quick,

easy reference and is divided into numbered sec
tions. Each section is then divided into sub-sections.
To use this manual proceed as follows:

Refer to the Index to determine section within
which desired information will be contained and

proceed to front of that section for its Table of
Contents.

as a supplement to and reminder of training sessions
conducted by Ariens Company. Before you attempt
any repair, adjustment or maintenance project be
certain that you have read and fully understand the
instructions in your Owner's Manual. Understand
and follow each Danger, Warning, Caution and all
instructions exactly as given. Also be sure that you
have Parts Manuals, all tools, replacement parts and
other materials required to complete the project.

IMPORTANT: All fittings, measurements, torque
recommendations and instructions are significant
and approximations or substitutions must be
avoided, improper repair, maintenance and/or
adjustments or service attempted by anyone other
than an authorized Ariens Service Dealer could void
future warranty claims, and damage unit and/or
result in injury to operator and/or bystanders.

Service Bulletins

In addition to the information contained in this

Ariens Service Manual, Ariens Service Bulletins

are issued to Ariens Dealers from time to time,

which cover interim engineering changes and supple

mentary information. Service Bulletins should be
consulted to complete information on models
covered by this manual.

Replacement Parts

Locate subject desired. Page number is listed across

from subject and consists of section number and

page number.
NOTE: Read all information for servicing a part or

system before repair work is started to avoid need

less disassembly.

Preparation For Service
Proper preparation is very important for efficient

service work. A clean work area at the start of each
job will allow you to perform the repair as easily
and quickly as possible, and reduce incidences of
misplaced tools and parts. A unit that is excessively
dirty should be cleaned before work starts. Cleaning
will occasionally uncover trouble sources. Tools,

instruments and parts needed for the job should be
gathered before work is started. Interrupting a job
to locate tools or parts is a needless delay. Special
tools required for a job are listed at the end of this

Introduction.

When replacement parts are required, use only

genuine Ariens parts. Failure to do so may result

in product malfunction and possible injury to opera

tor and/or bystander.

NOTE: All references to "Left", "Right", "Front"
and "Back" are given from operators position.

NOTE: The descriptions and specifications con
tained in this manual were in effect at the time the
manual was approved for printing. Ariens company
reserves the right to discontinue models without
notice and without incurring obligation. The equip
ment identified as either standard or optional and
the various illustrations may not all be applicable
to your unit. If you have questions, always check
with your Ariens dealer.

Safety Alert Symbol And Notations

The following safety notations are used throughout
this manual to call attention to special information
or operating procedures. Understand the message in
each notation and be alert to unsafe conditions and
the possibility of personal injury.

NOTE: A NOTE points out general reference infor
mation regarding proper operation and maintenance
practices.

IMPORTANT: An IMPORTANT statement indi

cates specific procedures or information that is
required to prevent damage to the machine or its
attachments.

This safety alert symbol is used to attract
your attention! PERSONAL SAFETY IS

A

INVOLVED! When you see this symbol -

BECOME ALERT - HEED ITS MESSAGE.

A

A

A

CAUTION: A CAUTION identifies safe
operating practices or indicates unsafe con
ditions that could result in personal injury.

WARNING: A WARNING describes a con
dition where failure to follow the instruc
tions could result in severe personal injury.

DANGER: A DANGER designates a con
dition where failure to follow instructions
or heed warning will most likely result in
serious injury or death.

Safety Precautions

Before test operating or making repairs of adjust
ments to the unit, read and understand the oper
ating and safety instructions in the Owner's Manual.

Disengage power to attachment, stop engine, remove
key and wait for moving parts to stop before
performing any repair or maintenance adjustment
procedures. DO NOT make any adjustment or
perform any maintenance or repair procedures

while engine is running unless specifically instructed
to do so in this manual.

DO NOT touch tractor or attachment parts which
might be hot from operation. Before attempting
to maintain, adjust or service, allow such parts to
cool.

Open doors if engine is run in garage, exhaust fumes
are dangerous. DO NOT run engine in an enclosed
area.

Do repair work in a well-lighted, ventilated area.

When unit is tipped to preform service procedures
in this manual, remove enough fuel so that no spil
lage will occur and block securely.

Gasoline is highly flammable and its vapors are
explosive. Handle with care. Use an approved fuel
container. DO NOT smoke or allow open flame
(match, pilot light, etc.) or sparks near equipment
or fuel container when refueling or servicing fuel
system.

Use non-flammable solvent to clean parts - DO NOT
use gasoline.

Use only Ariens original replacement parts when
making repairs.

After all repair procedures are performed, make sure
that unit is in good operating condition and all
safety devices and shields are in place and in good
working condition. Be sure all fasteners are tight,
all adjustments are correct and all tools are removed.

To prevent accidental starting, disconnect wire to
spark plug(s) and position wire away from plug.

Always wear safety goggles when cleaning or making
repairs to parts or machine.

DO NOT change engine governor setting or over

speed engine.
Never store equipment with fuel in tank inside a

building where fuel fumes may reach an open flame
or spark. Allow engine to cool before storing in any
enclosure.

Ill

Special Tools

000078 - Bearing Driver for Sno­Thro axle shaft and Sno-Thro gear
case.

000097 - Bearing Driver for Sno­Thro gear case flange and blower

bearing supports.

Roll Pin Driver for installation of
roll pins on all Ariens equipment.

000096 - 1/8
000162-3/16
000099-5/16
000098 - 1-1/4

000131 - Bearing Cup Driver for
Sno-Thro gear case. Slide Driver.

(£

000246 - Spring Tool. For most
Ariens Springs.

5)

000200 - Tire Removal and Re

placement Tool for small pneuma

tic tires.

000090 - Bearing Adjusting Wrench
for Sno-Thro gear case adjustment
plug.

IV

Index

Section

Specifications.

Handlebars and Controls.
Speed Selector and Wheels

Belt Drive

Reduction Drive
Friction Wheel Drive.
Auger/Impeller.

Gear Case.
Engine and Headlight

Attachments..............

© Ariens 1987

RM-924
Part No. 000123A

Printed in U.S.A. 8/87

Notes

Specifications

Length.................................................................... 60-63 inches

Height....................................................................40"

Cleaning Width

Shipping Weight................................................... 245 lbs to 345 lbs.

Wheel Size.............................................................(4.80/4.00 x 8) (16/6.50 x 8) (4.10/3.50 x 6)

Engine, Horsepower

Fuel........................................................................Unleaded - 1 Gallon Tanks

Governed R.P.M

Impeller R.P.M

Discharge Distance..............................................3' - 30'

Air Cleaner

Engine Oil

Spark Plug and Gap.................................................030 Champion RJ-17LM

Friction Wheel Drive

Differential.............................................................Standard or Available

.....................................................

............................................

...................................................

......................................................

............................................................

.............................................................

............................................

24"-36"

7-11 H.P.

• 3600

1080

Required with Summer Attachment

10W30, 5W30

Yes

Forward Speed

Reverse Speed

Electric Start Available

Headlight Available..............................................Yes

.....................................................

.....................................................

........................................

5 Forward .80 to 2.8 MPH

1 Reverse - 1 MPH

Yes - Available On All Models

1-1

Handlebars and Controls

Table of Contents

Page

2.1 Upper Handlebar Panel and Key Switch...............................................................................................2-4

2.2 Lower Handlebar.......................................................................................................................................2-4

2.3 Clutch Handle.............................................................................................................................................2-5

2.4 Attachment Clutch Adjustment............................................................................................................ 2-5

2.5 Wheel Drive Clutch Lever and Traction Rod........................................................................................2-5

2.6 Clutch Yoke and Fork...............................................................................................................................2-6

2.7 Traction Drive Clutch Adjustment..........................................................................................................2-6

2.8 Mechanical interlock Adjustment...........................................................................................................2-7

2.9 Bellcrank and Slider..................................................................................................................................2-7

2.10 Chute Crank.............................................................................................................................................2-8

2.11 Electrical Interlock Adjustment..........................................................................................................2-10

List of Illustrations

Page

2-1: Handlebars and Controls..........................................................................................................................2-1

2-2: Handlebars and Controls Exploded View..............................................................................................2-2

2-3: Handlebar Assembly..................................................................................................................................2-4

2-4: Attachment Clutch and Traction Rod..................................................................................................... 2-5

2-5: Clutch Yoke and Fork Assembly............................................................................................................. 2-6

2-6: Traction Drive Clutch.................................................................................................................................2-6

2-7: Interlock........................................................................................................................................................2-7

2-8: Bellcrank and Slider...................................................................................................................................2-7

2-9: Chute Crank............................................................................................................................................... 2-8

2-10: Electrical Interlock....................................................................................................................................2-9

2-11: Electrical Interlock Adjustment............................................................................................................2-10

Handlebars and Controls

1. Lower Handlebar

2. Speed Control Lever

3. Attachment Clutch Handle

4. Key Switch

5. Chute Crank

6. Upper Handlebar

7. Wheel Drive Clutch Handle

Figure 2-1: Handlebars and Controls

2-1

Handlebars And Controls

MECHANICAL INTERLOCK

Figure 2-2: Handlebars and Controls

2-2

Handlebars And Controls

ITEM

NO.

1
2
3
4
5 Cap Screw 1/4-20 x 1-1/2
6 Key Switch Nut 5/8-32
7
8 Snap Bushing
9

10
11
12
13 Slider
14 Extension Spring
15 Traction Clutch Rod
16 Extension Spring
17
18

19
20
21
22
23 Spacer Bushing
24 Bellcrank
25
26 Roll Pin 3/16x7/8
27
28
29
30
31

32
33
34
35
36

DESCRIPTION

Wheel Drive Clutch Lever

Upper Handle Bar
Lock Nut 1/4-20

Washer 1/4

Key Switch Assembly

Bushing

Lock Nut 1/4-20

Washer 9/32

Bushing

Hair Pin Int. 1/16 X 49/64
Jam Nut 1/4-20
Set Screw 1/4-20 x 3/4

Clevis Pin

Clevis
Washer 5/16

Lock Nut 5/16-18

Cap Screw 1/4-20 x 1/2
Stud Brace

Cap Screw 5/16-18 x 3/4

Lock Nut 5/16-18
Adapter Spacer
Adapter
Spacer
Set Screw 5/16-18 x 3/8

Rod Adapter
Extension Spring

ITEM

NO.

37

38
39
40

41

42
43
44
45
46
47
48
49
50

51

52
53
54
55
56
57
58
59
60

61

62
63

64
65
66
67
68
69
70

71

72

DESCRIPTION

Cotter Pin 3/32 X 3/4
Clutch Fork
Fork Pivot Rod
Cotter Pin 3/32 X 1"
Spring Assembly
Clutch Engagement Yoke

Lock Washer Int. 5/8
Lever

Lever
Roll Pin 5/32 X 7/8
Bushing
Nut 3/8-16

Lock Washer 3/8
R.H. Lower Handlebar

Clamp

Carriage Bolt 5/16-18 x 1-1/2

Carriage Bolt 5/16-18 x 3/4

Extension Spring

Clutch Chain

Lock Nut 5/16-18

L.H. Stiffener
Cotter Pin 1/8 X 1/2
Upper Handle Bar Panel

Snap Bushing

Carriage Bolt 1/4-20 x 1-1/2

Push Nut
Pin

Handle Pivot

Tapping Screw No. 12-14 x 1-1/2

Attachment Clutch Rod
Attachment Clutch Handle
Grip
Shorting Wire
Taptite 1/4-20 x 3/8

Jumper (924071)
Wire Clip

2-3

1. Key

2. Stiffener

3. Wire

4. Nut

5. Washer

6. Lower Handlebar

7. Carriage Bolt 5/16-18 x 1-1/2

8. Key Switch

9. Key Switch Nut

10. Cap Screw

11. Carriage Bolt 1/4-20 x 1-1/2

12. Lock Nut

Handlebars and Controls

Figure 2-3: Handlebar Assembly

2.1 Upper Handlebar Panel and Key Switch

Disconnect wires to key switch.
Remove key switch nut and remove key switch from

upper handlebar panel.
Remove (4) nuts and bolts on each side of handlebar

panel plus the bolt, nut and washer in center of

cross piece of upper handle bar and remove panel
stiffeners and upper handlebar.

Check parts for wear or replacement.

Assemble, using reverse procedure.

2.2 Lower Handlebar

Remove nut and washer attaching lower handlebar

to each side of frame and remove lower handlebar.

Check parts for wear or replacement.

Assemble, using reverse procedure.

2-4

Handlebars and Controls

1. Push Nut

2. Pin

3. Attachment Clutch Rod

4. Setscrew

5. Clevis

6. Cotter Pin

7. Chain

8. Spring

9. Rod Adapter

10. Traction Clutch Rod

11. Setscrew

12. Clevis

13. Push Nut

14. Pin

Figure 2-4: Attachment Clutch and Traction Rod

2.3 Clutch Handle

Remove (2) push nuts, pin and (2) screws holding
Clutch Handle and pivot to upper handle bar and
remove pivot and disconnect Clutch Handle from
clutch rod.

Remove set screw, jam nut and clevis from clutch
rod.

Remove cotter pin connecting rod to chain and

remove rod.

Disconnect chain and clutch spring from lever.

Check parts for wear or replacement.

Assemble, using reverse procedure.

2.4 Attachment Clutch Adjustment

Attachment Clutch is adjusted by connecting chain

to spring just below attachment clutch rod. Connect

spring to a chain link so chain is snug but so attach
ment idler drops away from belt with lever all the

way up.

2.5 Wheel Drive Clutch Lever and Traction Rod

Remove (2) push nuts, pin and (2) screws holding

pivot and Wheel Drive Clutch Lever to upper handle
bar and remove pivot and Wheel Drive Clutch Lever.

Remove set screw, nut, hair pin and clevis pin

holding clevis to Traction Clutch Rod.

Remove set screw in rod adapter and remove Trac

tion Clutch Rod.

Check parts for wear or replacement.

Assemble, using reverse procedure.

2-5

Handelbars and Controls

2.6 Clutch Yoke and Fork

Remove locknut and adapter spacer holding spring
assembly in clutch yoke.

Remove capscrew, nut and rod adapter from yoke.
Remove cotter pin from end of spring assembly

in clutch fork and remove spring assembly and
extension spring.

2.7 Traction Drive Clutch Adjustment

WARNING: Gasoline is highly flammable

A
A

and its vapors are explosive. Handle with

care. Never allow smoking materials, sparks

or flame (match, pilot light, etc.) near
equipment or fuel container.

CAUTION: When unit is tipped up onto
housing remove enough fuel so that no
spillage will occur.

Traction Clutch Rod

1.

2. Spacer

3. Setscrew
Rod Adapter

4.
Extension Spring

5.
Cotter Pin

6.
Fork Pivot Rod

7.
Cotter Pin

8.

Figure 2-5: Clutch Yoke and Fork Assembly

Punch out roll pins holding fork pivot rod in frame
and remove rod and clutch fork.

Check parts for wear or replacement.

Assemble, using reverse procedure.

9. Clutch Fork

10. Spring Assembly

11. Nut

12. Clutch Yoke

13. Capscrew

14. Adapter

15. Adapter Spacer

16. Lock Nut

2. Adjustment Nut

Figure 2-6: Traction Drive Clutch

Adjust traction clutch to compensate for wear of
friction wheel when slippage occurs.

To adjust traction clutch, place speed selector in

First (1) and tip machine forward onto housing.

With traction clutch disengaged turn wheels while

tightening adjustment nut, at clutch yoke, until
wheels begin to drag. Engage and release traction
clutch to align clutch linkage. Repeat procedure as

necessary. When wheel drag is obtained with linkage

aligned, turn nut back three turns. Wheels will then
turn freely.

2-6

Handelbars and Controls

2.8 Mechanical Interlock Adjustment

WARNING: With improper usage of unit,
failure of interlock if unnoticed, could

A

result in severe personal injury.

Check interlock by pressing down on clutch levers

(engaging both clutches). Remove hand from
attachment clutch lever, attachment clutch should
remain engaged until traction clutch lever is re
leased then both clutches must disengage.

2.9 Bellcrank and Slider

Remove nut and washer holding bellcrank to upper
handlebar panel.

Remove nut and washer holding slider to upper
handlebar panel and disconnect spring from upper
panel.

1.

Setscrew
Traction Clutch Clevis

2.

Slider

3.

4. Roller

5. Attachment Clutch Clevis

Figure 2-7: Interlock

With traction clutch lever "UP" (disengaged) loosen
clevis set screw on traction clutch rod, pull clevis
down until slider is at end of slot and tighten set
screw.

Engage both clutch levers "DOWN", loosen clevis
set screw on attachment clutch rod and slide clevis
to clear roller on slider by 1/16 inch. Tighten set
screw with leg of clevis parallel to slider.

1. Attachment Clutch Rod 9.

2. Extension Spring

3. Hair Pin

4. Setscrew

5. Clevis Pin

6. Jam Nut 14.

7. Clevis

8. Washer

Figure 2-8:

Bellcrank and Slider

Spacer Bushing

10.

Bellcrank
Lock Nut

11.

12.

Washer

13.

Bushing
Slider

15.

Extension Spring

Remove slider assembly and check all parts for

replacement or repair.

NOTE: Be sure to check bushings and spacers for

wear.

Assemble, using reverse procedure.

2-7

2.10 Chute Crank

Handelbars and Controls

Smooth and easy rotation of properly lubricated
chute with crank (without binding) is obtained by
adjusting clearance between worm and discharge
chute gear teeth. To adjust, loosen nut on bracket
supporting worm, position worm to fully engage

(without binding), gear teeth on discharge chute
and tighten nut.

On ST 1136 to prevent discharge chute from rotat

ing by itself when unit is being operated, tighten jam
nuts on end of crank rod to put increased tension on

worm gear.

1. Bracket

2. Worm Gear

3. Adjustment Nuts

Figure 2-9: Chute Crank

2-8

WHITE
TO ENGINE ■
MAGNETO

Handlebars and Controls

ELECTRICAL INTERLOCK

1. Switch Boot

2. Wiring Harness

3. Clip

4. Shorting Wire

5. Flange Whiziock Screw

6. Switch

7. Cap Screw 10-24 x 3/8

8. Modulet

9. Wire Ground

10. Keps Nut

11. Connector

Figure 2-10: Electrical Interlock

2-9

Handlebars and Controls

2.11 Electrical Interlock Adjustment

Engine runs with interlock and/or traction clutch
engaged. Engine must stop if both are disengaged
with attachment clutch engaged.

Shorten interlock rod if engine will not run with

interlock, attachment clutch and/or traction clutch
engaged. Lengthen interlock rod if engine stays
running when both interlock and traction handle are
released with attachment clutch disengaged.

Check switch bracket alignment with switch and
align if necessary.

To adjust length of rod, remove cotter pin from
upper interlock rod at handle, loosen lock nut and
turn rod to lengthen or shorten.

Figure 2-11: Electrical Interlock

2-10

Notes

Speed Selector and Wheels

Table of Contents

Page

3.1 Speed Selector...........................................................................................................................................3-4

3.2 Speed Selector Adjustment.....................................................................................................................3-4

3.3 Shift Arm Lever and Links.......................................................................................................................3-4

3.4 Wheel Assembly.........................................................................................................................................3-4

List of Illustrations

Page

3-1: Speed Selector and Wheels......................................................................................................................3-1

3-2: Speed Selector and Wheels Exploded View..........................................................................................3-2

3-3: Speed Selector............................................................................................................................................3-4

Speed Selector and Wheels

f—

V—a__rt__a--'

1. Speed Selector

2. Upper Shift Rod

3. Nut

4. Lower Shift Rod

j—If—\J—

i

5. Shift Links

6. Shift Links

7. Shift Arm Lever

8. Shift Lever Bracket

Figure 3-1: Speed Selector and Wheels

3-1

Speed Selector And Wheels

©-

3-2

Speed Selector And Wheels

ITE M

NO .

1

2
3
4
5
6
7
8
9

10

11 Upper Shift Rod

12 Nut 5/16-24
13 Cotter Pin 3/32 X 3/4

14 Shift Link

15

DE SC R IP TI ON

Snap Ring Ext. 1/2
Knob

Rod 18
Extension Spring
Pivot

Lock Nut 5/16-18

Lock Nut 1/4-20
Cap Screw 1/4-20 X 1"
Cap Screw 5/16-18 x 2-1/2
Cotter Pin 1/8 X 3/4

Clevis Pin

ITE M

NO .

16
17

19
20
21
22
23
24
25
26
27 Taptite 5/16-18 X 1/2
28
29

DE SC R IP TI ON

Lower Shift Rod
Shift Arm Lever
Frame
Bottom Cover
Spindle Cup
Push Nut or Cotter Pin

Wheel Assembly

Hub Cap

Taptite 1/2-20 x 5/8

Cap Screw 5/16-18 x 1/2

Shift Lever Bracket

Cap Screw 5/16-18 x 3"

Spacer

3-3

Speed Selector and Wheels

3.1 Speed Selector

Remove cotter pin in upper rod and disconnect

rod from pivot.

Remove cotter in lower rod and disconnect from

shift arm lever.

Remove upper cap screw and nut in pivot and

remove shift rod and knob.

Remove lower cap screw and nut in pivot and

remove pivot from upper handle bar panel.

Check parts for wear or replacement.

Assemble, using reverse procedure.

3.2 Speed Selector Adjustment

Place Speed Selector in Reverse (R) position. While

pulling lower rod up to its maximum up position,
turn upper shift rod into lower rod until end of
upper rod lines up with hole in shift handle. Insert
upper rod into shift handle, install cotter pin and
tighten lock nut on shift rod.

3.3 Shift Arm Lever and Links

Remove cotter pin and clevis pin holding shift links

to shift arm lever.

Remove (3) capscrews, on outside of frame, holding

shift lever bracket to frame and remove bracket.

Remove capscrews, nut and spacer from shift arm
lever and disconnect lever from shift lever bracket.

Check parts for wear or replacement.

Assemble, using reverse procedure.

ggsl

isssi

- j

1. Lock Nut

2. Cotter Pin

3. Upper Shift Rod

4. Lower Shift Rod

5. Capscrew

6. Speed Selector Knob and Rod

Figure 3-3: Speed Selector

3.4 Wheel Assembly

Remove hub cap, push nut and spindle cap.
Remove (3) bolts holding wheel to wheel hub and

remove wheel.

Check parts for wear or replacement.

Assemble, using reverse procedure.

3-4

Notes

Belt Drive

Table of Contents

Page

4.1 Introduction.............................................................................................................................................. 4-4

4.2 Attachment Drive Belt...............................................................................................................................4-4

4.3 Traction Drive Belt.....................................................................................................................................4-4

List of Illustrations

Page

4-1: Belt Drive Assembly...................................................................................................................................4-1

4-2: Belt Drive Exploded View..........................................................................................................................4-2

4-3: Drive Belts....................................................................................................................................................4-4

4-4: Impeller Brake..............................................................................................................................................4-4

Belt Drive

1. Pulley

2. Attachment Pulley

3. Idler

4. Belt

5. Engine Pulley

6. Belt

Figure 4-1: Belt Drive Assembly

4-1

Belt Drive

4-2

Belt Drive

ITE M

NO .

9
10
11
12
13
14
15
16 Set Screw 5/16-18 x 3/8 38
17
18

19 Pulley

20

21 V-Belt

22 Rib Neck Bolt 5/16-18x7/8
23 Pulley
24
25
26 Lock Nut 1/4-20
27 V-Belt
28 Hub
29
30

DE SC R IP TI ON

Taptite 1/4-20 x 1/2
Washer 17/64

Belt Cover 33
Belt Finger

Washer 3/8

Lock Washer Ext. 5/16

Cap Screw 5/16-24 x 3/4

Pulley
Straight Key 1/4 x 1-3/4 x 1/4

Lock Nut 5/8-18

Belt Retainer

Cap Screw 1/4-20 x 1/2

Lock Nut 5/16-18
Lock Nut 5/16-18

ITE M

NO .

31
32

34
35
36
37 Bracket

39
40
41 Taptite No. 10-24 x 3/8
42
43
44
45
46
47
48
49
50
51
52

DE SC R IP TI ON

Washer 5/16

Idler
Bearing Spacer
Cap Screw 5/16-18 x 1-1/4
Idler Arm
Clevis Pin

Taptite 1/4-20 x 3/8

Cotter Pin 3/32 X 3/4
Return Clip

Activating Shaft

Extension Spring 3-3/8
Bushing

Spacer

Idler Arm
Extension Spring
Cotter Pin 1/8 x 1"

Washer 3/8
Wave Washer

R.H. Support
L.H. Support

4-3

Belt Drive

4.1 Introduction

WARNING: Remove wire from spark plug

before attempting any repair or adjustment

A

When unit is tipped to preform the service proce
dures in this section, remove enough fuel so that no
spillage will occur, block securely and remove bot
tom cover.

A

Separate auger/impeller housing per instructions in

Auger/Impeller Section.

4.2 Attachment Drive Belt

procedures.

WARNING: Gasoline is highly flammable
and its vapors are explosive. Handle with
care.

Remove attachment drive belt from pulley (hold

brake away from belt).

Replace attachment drive belt in reverse order

making sure pulleys align. If alignment is necessary,

loosen attachment pulley set screws, reposition

pulley and retighten set screws.

WARNING: When clutch is engaged, impel

ler brake disengages. If brake is not 1/16 to

A

1/8" from belt when disengaged

1. Traction Drive Belt

2. Engine Pulley

3. Attachment Drive Belt

4. Attachment Belt Idler

5. Traction Belt Idler

Figure 4-3: Drive Belts

1. Brake Shoe

2. Drive Belt

Figure 4-4: Impeller Brake

4.3 Traction Drive Belt

Pull idler away from belt and remove belt from idler
pulley, engine and driven pulley (it may be neces
sary to turn engine engine pulley using rewind
starter).

NOTE: To gain clearance engage traction clutch and

if necessary pull back attachment idler arm clevis
pin.

Replace traction drive belt in reverse order making

sure pulleys align. If alignment is necessary, loosen
engine pulley set screws, reposition pulley and re
tighten set screws. Check alignment of attachment
driven pulley and align if necessary.

4-4

i

Notes

Reduction Drive

Table of Contents

Page

5.1 Introduction................................................................................................................................................5-4

5.2 Differential, Lockout and Axle................................................................................................................5-4

5.3 Axle Bearings.............................................................................................................................................5-4

5.4 Pinion, Shaft and Sprocket......................................................................................................................5-4

5.5 Reduction Shaft.........................................................................................................................................5-4

5.6 Hex Shaft.....................................................................................................................................................5-4

5.7 Drive Chains...............................................................................................................................................5-5

5.8 Drive Chain Adjustment...........................................................................................................................5-5

List of Illustrations

Page

5-1: Reduction Drive Assembly.......................................................................................................................5-1

5-2: Reduction Drive Exploded View...............................................................................................................5-2

5-3: Drive Chains.................................................................................................................................................5-5

Reduction Drive

Figure 5-1: Reduction Drive Assembly

1. Idler Chain

2. Hex Shaft

3. Pinion Shaft

4. Drive Spindle Housing

5. Spindle

6. Differential

7. Differential Lockout

8. Axle

9. Pinion and Sprocket

10. Sprocket

11. Pinion Chain

5-1

Reduction Drive

5-2

Figure 5-2: Reduction Drive

Reduction Drive

ITE M

NO .

1
2
3

4

5

6

7
8

9
10 9 Tooth Sprocket
11
12

13

14

15

16
17
18
19

20
21 Reduction Shaft
22
23
24
25
26
27
28
29 Roll Pin 1/8 X 1"
30

DE SC R IP TI ON

Taptite 1/4-20 x 3/8
Shaft Support

Bearing Retainer

Ball Bearing 1-1/8 I.D.

Washer 7/8

Rib Neck Bolt 1/4-20 x 1/2
Lock Nut 1/4-20

Hex Shaft

Woodruff Key 1/8 x 5/8 x 1/4

Idler Chain

Washer 17/32

Bearing Flange
Ball Bearing 1/2 I.D.
Bearing Flange

Lock Nut No. 10-24
Lock Nut 1/2-20
Nut 3/8-16
Lock Washer 3/8

Washer 3/8

Bushing
Reduction Sprocket (Double or Single)
Shaft Support

Taptite 1/4-20 x 1/2
Washer 5/8

Pinion Shaft

Roll Pin 5/32x1"

Pinion Chain

ITE M

NO .

31
32

33
34

35
36
37 Lock Washer Ext. 1/4
38

39 Bushing
40
41
42 Roll Pin 3/32 X 1"
43
44
45 Compression Spring
46
47
48
49
50

51

52
53
54

55

DE SC R IP TI ON

Pinion and Sprocket
Bushing

Zerk Fitting
Differential or Spur Gear

L.H. Axle

Bushing

Zerk Fitting

Groove Pin 1/4 X 1-3/4
Lockout Hub Assembly

Knob
Lockout Hub

Pin
Wheel Hub

Washer 3/4

Roll Pin 3/16 X 1-1/4
Cotter Pin 1/8 X 1-1/4
Feather Key 3/16 x 1-1/4 x 3/16
Axle Shaft

Woodruff Key 1/4x3/4x5/16

Roll Pin 3/16 X 1-1/2
R.H. Axle

5-3

Reduction Drive

5.1 Introduction

WARNING: Gasoline is highly flammable
and its vapors are explosive. Handle with

A

When unit is tipped to preform the service proce
dures in this section, remove enough fuel so that

no spillage will occur, block securely and remove
bottom cover.

A

5.2 Differential, Lockout and Axle

Remove groove pin that secures lockout assembly

to left hand axle and lockout assembly from shaft.

(Pin is tapered and must be driven from small

end.)

care.

WARNING: Remove wire from spark plug

before attempting any repair or adjust
ment procedures.

Remove cap screws and lock nuts that retain

bearing retainer and bearing on frame.

Assemble in reverse order.

5.4 Pinion, Shaft and Sprocket

Remove L.H. rear wheel per instructions in Speed

Selector and Wheels Section.

Remove the roll pins from pinion shaft. Note

position of washers and remove shaft from frame.
Check pinion and sprocket bushings as well as

other parts for wear or damage and replace as
necessary.

Assemble in reverse order.

5.5 Reduction Shaft

Remove nuts and lock washers from ends of reduc

tion shaft.

Remove shaft and reduction sprocket from unit.

Remove roll pin that secures knob, spring and pin

to lockout hub.

Remove L.H. axle from unit.
Remove roll pin from R.H. axle, then remove

differential from axle while sliding axle from unit.

(Differential is serviced as a complete assembly.)
Check L.H. axle bushings and other parts for wear

or damage and replace as necessary.

Assemble in reverse order.

On units with spur gear, to remove axle, remove

cotter pins that secure wheel hubs to axle, roll pins
from axle and parts from unit.

Check components for wear or damage and replace
as needed.

Assemble in reverse order.

5.3 Axle Bearings

Check reduction sprocket bushings and other parts
for wear or damage and replace as necessary.

Assemble in reverse order and adjust chain per

instructions in Drive Chain Adjustment.

5.6 Hex Shaft

Hold hex shaft on sprocket end with a wrench and
remove lock nut at outside of frame. Slide hex

shaft to center of frame until it clears sprocket and

remove 9 tooth sprocket.

To service hex shaft ball bearing, remove four lock

nuts from bearing flanges then flanges and bearing

from unit.

Check parts for wear or damage and replace as
necessary.

Assemble in reverse order being sure that washers
are in position at outside of bearing flanges.

To replace axle bearings, remove axles per above

instructions.

5-4

Reduction Drive

5.7 Drive Chains
Remove link from chain and chain from sprocket.

On continuous chain grind off end of rivet.

When replacing chain, be sure retainer clip faces

center of unit and is well seated in grooves of master

link, No. 000041.

5.8 Drive Chain Adjustment

If Sno-Thro is difficult to push because of tight or

interfering drive chains, proceed as follows:

Stand unit up on auger/impeller housing and re

move bottom cover.

Chain tension is adjusted by loosening two nuts on

Reduction Shaft. Adjust reduction sprocket up or
down in slot to obtain proper tension (chain
should be snug). Retighten both nuts. Torque to

170-180 inch lbs.
Chain interference with the Bearing Flange on Hex

Shaft can occur if there is no Washer between
Sprocket and Bearing. Make sure washer is installed.

NOTE: Check interlock mechanism to ensure pro
per operation as follows:

Check both clutches to be sure they operate freely
without binding.

Figure 5-3: Drive Chains

5-5

Friction Wheel Drive

Table of Contents

Page

6.1 Introduction........................................................................................................................6-3

6.2 Friction Wheel....................................................................................................................6-3

6.3 Friction Wheel Carrier.......................................................................................................6-3

6.4 Drive Plate Spindle.............................................................................................................6-3

List of Illustrations

Page

6-1: Friction Wheel Assembly.................................................................................................. 6-1

6-2: Friction Wheel Exploded View..........................................................................................6-2

6-3: Friction Wheel.....................................................................................................................6-3

Friction Wheei Drive

1. Hex Shaft

2. Friction Disc

3. Drive Plate

4. Drive Spindle Housing

Figure 6-1: Friction Wheel Assembly

6-1

Friction Wheel Drive

iTEM

NO.

1
2 Drive Disc Spacer
3
4
5
6
7
8
9

10

11

12
13
14
15

DESCRIPTION

Drive Plate

Spindle 18
Woodruff Key 1/8 x 1/2 x 13/64
Drive Spindle Housing
Bearing 5/8 I.D.
Bearing Spacer
Bearing Housing

Roller 24

Washer 11/32

Lock Washer 5/16

Cap Screw 5/16-18 X 1"
Shaft Support 28
Taptite 1/4-20 x 3/8

Carrier Shaft

6-2

ITEM

NO.

16
17

19
20

21

22
23

25
26

27 Spindle Hub

29

30

31

DESCRIPTION

Roll Pin 5/32 X 1"
Bushing
Nylon Lock Nut 7/8-14
Bushing
Carrier

Radial Bearing 7/8

Washer 7/8

Snap Ring Int. 1-3/4

Hub

Friction Wheel

Taptite 5/16-18 X 1/2

Cap Screw 5/16-18 x 1/2

Lock Washer 5/16

Pulley
Lock Nut

Friction Wheel Drive

6.1 Introduction

WARNING: Remove wire from spark plug

before attempting any repair or adjustment

A

When unit is tipped to preform the service proce

dures in this section, remove enough fuel so that
no spillage will occur, block securely and remove
bottom cover.

A

6.2 Friction Wheel

Remove bottom cover by removing four cap screws.

Place Speed Selector in first "1" position, depress
Traction Clutch Lever to hold friction wheel and

loosen five cap screws securing friction wheel to
hub. Release traction clutch lever, remove cap
screws, shift to third "3" position, disconnect
shift link and remove friction wheel.

procedures.

WARNING: Gasoline is highly flammable

and its vapors are explosive. Handle with
care.

6.3 Friction Wheel Carrier

Remove roll pins from carrier shaft and pull shaft

out of frame far enough to free carrier.

Hold hex shaft on sprocket end with a wrench and
remove lock nut at outside of frame. Slide hex
shaft to center of frame until it clears sprocket and
remove carrier from frame.

Remove nylon lock nut from spindle hub and hub

from carrier.

Remove snap ring, washer, bearing and bushing from

carrier.
Check carrier bushings and other parts for wear or

damage and replace as necessary.

Assemble in reverse order.

6.4 Drive Plate Spindle

Separate auger/impeller housing per instructions in
Auger/Impeller Section.

Remove lock nut from pulley end of spindle and

pulley from spindle. (To remove nut, engage friction
wheel drive to keep spindle from turning.)

Secure new friction wheel on hub with five cap

screws and torque cap screws to 8-10 foot pounds.

Install shift link.

1. Cap Screw

2. Friction Wheel

Remove friction wheel carrier per previous instruc

tions.

Remove drive spindle housing from frame by re

moving three cap screws and lock washers from
housing.

Check spindle bearings and other parts for wear or
damage and replace as necessary.

Assemble in reverse order applying Locktite Anti
seize to outside of bearing housing.

NOTE: Mix 1 part Mobil 1 with 16 parts Locktite

No. 767 Antiseize.

Figure 6-3: Friction Wheel

6-3

Auger/Impeller

Table of Contents

Page

7.1 Introduction....................................................................................................................... 7-4

7.2 Auger/Impeller Housing....................................................................................................7-4

7.3 Auger/Impeller Removal...................................................................................................7-4

7.4 Attachment Clutch/Impeller Brake

7.5 Discharge Chute................................................................................................................7-5

7.6 Deflector.............................................................................................................................7-5

7.7 Scraper Blade.................................................................................................................. 7-6

7.8 Shear Bolt Replacement...................................................................................................7-6

7.9 Runners..............................................................................................................................7-6

..................................................................................

7-4

List of Illustrations

Page

7-1: Auger/Impeller Assembly..........................................................................................7-1

7-2: Auger/Impeller Exploded View..................................................................................7-2

7-3: Impeller Brake.............................................................................................................7-4

7-4: Discharge Chute....................................................................................................... 7-5

7-5: Deflector......................................................................................................................7-5

7-6: Scraper Blade..............................................................................................................7-6

7-7: Runners.......................................................................................................................7-6

Auger/Impeller

1. Chute Crank

2. Universal Joint

3. Impeller

4. Gear Case

5. Scraper Blade

Figure 7-1: Auger/Impeller Assembly

6. Runner

7. Auger Housing

8. Auger

9. Discharge Chute

10. Worm Gear

7-1

Auger/Impeller

¿^>,3

7-2

Figure 7-2: Auger/Impeller

Auger/Impeller

ITEM

NO.

1 Deflector 36

2
3
4
5
6 Universal Joint
7
8 Rod
9

10

11

12

13

14
15

16
17
18
19
20 Runner 55

21

22 Lock Nut 3/8-16
23
24
25 Radial Bearing 3/4 or Ball Bearing
26 Bearing Flange
27
28
29
30 Lock Nut 5/16-18 65

31 Zerk Fitting

32 Auger
33
34
35 Bearing Support
36

DESCRIPTION

Cap
Knob 38

Chute Control Crank

Hair Pin or Cotter Pin

Roll Pin 1/8 X 3/4

Chute Crank Bracket
Worm Shaft
Wave Washer

L.H. Worm Gear 47
Washer 25/64 - Plastic
Carriage Bolt 5/16-18 x 3/4 49
Worm Clevis

Lock Washer 3/8

Lock Washer 5/16
Nut 5/16-18
Auger/Impeller Housing

Washer 3/8

Carriage Bolt 3/8-16 x 1"
Carraige Bolt 3/8-16 x 3/4

V

Rib Neck Bolt 1/4-20 x 1/2
Scraper Blade
Carriage Bolt 5/16-18 x 5/8

Shear Boltw/Nut

Washer 1"

ITEM

NO.

37

39
40
41
42
43
44
45
46

48

50
51
52
53
54

56
57
58
59
60
61
62
63
64

66
67
68
69
70

DESCRIPTION

Lock Nut 1/4-20

Bushing

Washer 1/2

Lock Washer 1/2

Cap Screw 1/2-13 x 1"

Extension Spring
Lock Nut 1/4-20

Arm Extension

Arm w/Lining

Clevis Pin
Cotter Pin 1/16 X 3/4
Brake Lining
Oval Rivet 3/16 x 7/16

Cap Screw 1/4-20 x 5/8
Nut Retainer 3/8-16
Flanged Screw 3/8-16 x 3/4
Bearing Flange

Taptite No. 10-24 x 3/8

Chute Clamp
Cotter Pin 3/32 X 3/4
Control Cable
Machine Screw No. 10-32 x 1/2

Tee Handle

Deflector Control Bracket
Discharge Chute

Lock Nut 3/8-16
Washer 13/32
Plastic Washer

Cap Screw 3/8-16 x 3/4
Rib Neck Bolt 5/16x7/16

Pulley

Hub

Set Screw 5/16-18 x 3/8

Nut 5/16-18
Impeller and Gear Case

7-3

Auger/Impeller

7.1 Introduction

WARNING: Remove wire from spark plug

before attempting any repair or adjustment

A

When unit is tipped to preform the service proce

dures in this section, remove enough fuel so that no
spillage will occur, block securely and remove bot
tom cover.

A

7.2 Auger/Impeller Housing
To separate housing from unit, remove two screws

securing belt guard to unit and remove belt guard.

Remove hairpin from chute crank assembly at "U"

joint and separate.

Remove attachment drive belt from engine pulley
(it may be necessary to turn engine pulley using
rewind starter).

procedures.

WARNING: Gasoline is highly flammable

and its vapors are explosive. Handle with
care.

Grasp auger assembly and pull gear case and auger/
impeller assembly free of housing.

Drive roll pin out of shaft ends, remove shear bolts
and remove auger from shaft.

Check all parts for wear or replacement.

Assemble using reverse procedure.

7.4 Attachment Clutch/Impeller Brake

WARNING: With improper use injury may

A

To check and/or adjust impeller brake, tip unit
forward onto auger/impeller housing. Remove bot
tom cover by removing four cap screws. Measure
distance between impeller brake shoe and belt with
attachment clutch engaged. When attachment clutch

is disengaged, brake must contact belt.

result if attachment clutch lever is released

and brake DOES NOT STOP auger/impeller
within 5 seconds.

IMPORTANT: To avoid bending bottom cover,
when tipping unit apart, support handlebars firmly
or tip unit up on housing and remove bottom cover
by removing four cap screws before separating
unit.

Remove cap screws securing housing to frame (one

on each side). Tip housing and frame apart on pivot
pin.

7.3 Auger/Impeller Removal

Remove (3) three nuts holding pulley to hub and re

move pulley and key.

Loosen set screw in hub and remove hub.
Remove (3) three nuts holding bearing flange to

housing and remove bearing flange.

Remove (2) two cap screws and lockwashers on each

side of blower housing holding rake shaft in position

and remove bushing.

Remove (3) three lock nuts attaching bearing

support to housing and remove bearing support.

1. Brake Shoe

2. Drive Belt

3. 1/16" -1/8" Between Shoe and Belt

4. Spring Extension - 3/8"

Figure 7-3: Impeller Brake

7-4

Auger/Impeller

If impeller brake shoe is not 1/16 to 1/8 inch from

belt, disengage clutch, loosen attachment idler nut,
reposition idler to compensate for belt length,

tighten nut and adjust attachment clutch per in
structions below.

Adjust attachment clutch with both clutch lever and
clutch arm in disengaged position, pull clutch chain

taut and connect chain link to spring. Spring should
extend approximately 3/8" when clutch is engaged
but allow clutch arm (at lower end) to return to it's
maximum down position when clutch is disengaged.

7.5 Discharge Chute

DANGER: DO NOT put hands or feet near

A

A

or under rotating parts. Keep clear of dis
charge opening at all times.

WARNING: NEVER direct discharge of
material toward bystanders nor allow any
one in front of equipment while unit is in
operation. Be familiar with area of opera
tion.

7.6 Deflector

On ST 1136 remove one jam nut from deflector
cable, route cable through retainer mounted on
engine and chute bracket. Replace jam nut and
secure cable threaded connector (from left side) to
deflector bracket with cotter pin. Position deflector

in its lowest position with calDle control pushed full
in and tighten jam nuts on chute bracket.

NOTE: Check deflector movement to highest posi

tion. Adjust jam nuts and/or threaded connector if

necessary to obtain full travel.

Slide handle end of Deflector Control Cable through

hole in upper handlebar panel and secure with

washer and jam nut. Secure T-Handle on end of

Deflector Control Cable.

1. Discharge Chute

2. Mounting Clip

Figure 7-4: Discharge Chute

Remove mounting clips from discharge chute, oil

and position chute on auger/impeller housing.

Secure discharge chute with mounting clips and

hardware.

NOTE: Chute must rotate freely.

1. Discharge Chute

2. Deflector

3. Cotter Pin

7-5

4. Cable Control

5. Deflector Bracket

6. Mounting Clip

Figure 7-5: Deflector

Gear Case

Table of Contents

Page

8.1 Introduction.........................................................................................................................8-6

8.2 Cast Iron Gear Case (Worm Gear)....................................................................................8-6

8.3 Aluminum Gear Case (Worm Gear)..................................................................................8-6

8.4 Cast Iron Gear Case (Helicon Gear)..................................................................................8-7

List of Illustrations

Page

8-1; Gear Case Assemblies.......................................................................................................8-1

8-2: Cast Iron Gear Case (Worm Gear) Exploded View

8-3: Aluminum Gear Case (Worm Gear) Exploded View........................................................8-4

8-4: Cast Iron Gear Case (Helicon Gear) Exploded View.......................................................8-5

......................... ...............................

8-2

Gear Case

1. Cast Iron Gear Case (Worm)

2. Cast Iron Gear Case (Helicon)

3. Aluminum Gear Case (Worm)
Figure 8-1: Gear Case Assemblies

8-1

Gear Case

Cast Iron

Gear Case

Cast Iron

ITEM

NO.

1
2
3
4 Worm Shaft

5

6

7 Seal

8

9

10
11
12
13
14

15
16
17

DESCRIPTION

Roll Pin 5/16 X 1-3/4
Fan

Woodruff Key 3/16x7/8x3/8

Straight Key 3/16 x 1" x 3/16
Adjusting Plug

Bearing Cup 1-25/32 O.D.
Bearing Cone 3/4 I.D.
Bearing Spacer

Worm & Gear

Snap Ring Int. 1-25/32
Seal 1-5/8
Pipe Plug

Washer 21/64

Lock Washer 5/16

Cap Screw 5/16-18 x 3/4

ITEM

NO. DESCRIPTION

18
19
20
21
22
23
24
25
26
27

28

29
30

31

Dust Cap
Roll Pin 3/16 X 1-1/2
Gear Case
Bushing

Washer 1-5/8
Woodruff Key 1/4 X 7/8 X 3/8

Gear Case Shaft
Gasket
Gear Case Cover

Lock Washer Int. 1/4
Cap Screw 1/4-20 x 3/4

Rake Shaft
Gear Case Assembly

Requires 5 oz. L-2 Special Gear

Lube Part No. 000080

L-2 Special Gear Lube

16 oz. Bottle

8-3

Gear Case

Aluminum

ITEM

NO.

1
2
3
4
5
6
7
8
9

10
11
12
13
14

ITEM

DESCRIPTION

Roll Pin 1/4 X 1-3/4 15
Impeller
0-Ring
Bushing

Thrust Collar

Groove Pin 3/16 X 1-1/4
Woodruff Key 3/16 x 7/8 x 3/8
Worm Gear & Shaft

L.H. Gear Case Half

Carriage Bolt 1/4-20 x 1-1/4
Seal

Taptite No. 10-24 x 3/4

Carriage Bolt 1/4-20 x 7/8

Roll Pin 3/16 X 1-1/2

NO.

8-4

20
21
22
23
24

25

16
17
18
19

DESCRIPTION

Bushing
Bushing

Washer 1"

Groove Pin 5/16 x 1-7/16
Gasket

R.H. Gear Case Half
Lock Nut 1/4-20

Taptite 3/8-16 x 1/2

Rake Shaft
Gear Case Assembly
Requires 2 oz. Liquid Grease

Part No. 000072

Liquid Grease 8 oz. Tube

Figure 8-4: Cast Iron Gear Case (Helicon Gear)

Gear Case

Cast Iron

ITEM

NO.

1

2
3
4
5
6
7
8
9

10

11

19 ' I

DESCRIPTION

Roll Pin 1/4 X 1-1/4

Fan
Seal
Adjustment Plug 15

Bearing Cup 16

Bearing Cone

Helicon Pinion Shaft

Bearing Spacer 19
Snap Ring

Roll Pin 5/16x1-3/8
Washer

ITEM

NO.

12 Seal
13 Gear Case
14

17
18

20
21

DESCRIPTION

Gasket
Flange Whiziock Screw
Pipe Plug
Bushing
Helicon Gear
Front Gear Shaft

Roll Pin 3/16 X 1-1/2 1

Gear Case Flange

8-5

Gear Case

8.1 Introduction

WARNING: Remove wire from spark plug

A

When unit is tipped to preform the service proce
dures in this section, remove enough fuel so that no
spillage will occur, block securely and remove bot
tom cover.

A

Remove Auger/Impeller and gear case from housing

per instructions in Auger/Impeller Section to pre
form the following service procedures.

8.2 Cast Iron Gear Case (Worm Gear)

before attempting any repair or adjustment
procedures.

WARNING: Gasoline is highly flammable
and its vapors are explosive. Handle with
care.

Using adjustment wrench, tighten down on adjust
ment plug until input shaft is snug.

Replace side cover using a sealant on threads of two

bottom bolts.

Fill gear case with L-2 oil until level reaches bottom

of threads in filler hole.

Check oil level periodically. Oil level must be up to
oil fill hole. Change oil every 25 hours or once each
season whichever comes first. Fill with Ariens
Special L-2 Gear Lubricant (Part No. 000080). Use
approximately 5 oz.

8.3 Aluminum Gear Case (Worm Gear)

Remove (6) six bolts that hold right and left gear-

case halves together.

If flange bushings need replacement, first remove

seals from outside of gearcase halves with a screw
driver. Flange bushings can then be pressed out from
outside in with a bearing driver. Bushings are very

lightly pressed in.

Remove four bolts from bearing flange.

Remove flange and gasket.

NOTE: At this point bronze gear cannot be re
moved.

Using bearing adjustment wrench remove adjust
ment plug.

While holding input shaft in one hand and using a

mallet, strike case until bearing cone pops out of

the case.

Bronze gear can then be removed from case.

After bronze gear is removed, input shaft can then

be removed.
NOTE: it is not necessary to remove the end cap

from case.
To remove worm gear and bearings, simply remove

bolt and washer from end of shaft.

When replacing bushings make sure flat on the
flange of bushing fits in the inside notch of case.

There are (2) special washers, one on either side of

bronze gear. If burred or worn they should be
replaced.

Holding bronze gear on rake shaft is a groove pin.

When driving out, drive in direction of least resis

tance. Flat on bronze gear face's fill hole side of
gearcase.

Remove bronze bushing from front of worm shaft
by sliding it off. If replacement is necessary, replace.
Notice a flat on the bushing flange when installed
sets against flat in gearcase.

Behind rear bronze bushing is an "0-Ring" which
fits into a groove in gearcase. It should be replaced
at time of repair.

Rear bushing is a larger diameter than one in front,
but are identical in design. Replace if necessary.

Assembly is done by inserting bronze and worm gear

at same time.

If replacement of thrust collar is necessary, again
drive out groove pin towards direction of least

resistance.

8-6

Gear Case

Inspect worm for burrs or black coloration. If either

show up, replace shaft.
To assemble make sure you replace the case gasket

and make sure flats on bushings are in their proper
place.

This case requires No. 70 Liquid Grease and should

be half full.

After assembly is completed you should be able
to turn input shaft freely.

Auger/impeller gear case is lubricated with Ariens

Liquid Grease (Part No. 000070). This grease will

not flow at lower temperatures. It is therefore

difficult to check lubricant level. Best method for
checking is to place unit in a warm location over
night. This allows grease to flow to level. Check

lubrication by removing filler plug on side of gear

case just above left auger shaft. Lubrication should

be even with hole with machine sitting level. It may

be necessary to insert a wire into hole to check

level. Unit will not be damaged by over lubricating.

8.4 Cast Iron Gear Case (Helicon Gear)

To remove Gear Case from Auger/impeller Housing

refer to Auger/impeller Section.

Tools Required:

Open End Wrench - 7/16"

Ratchet Wrench with 7/16" socket

Hammer
Punch-5/16", 3/8"
Screwdriver (two required)
AriensToolsNo. 37, No. 90, No. 130 & No. 131

Unscrew adjustment plug. (Use No. 90 Bearing

Adjustment Wrench.)

Insert punch through the oil filler hole and drive
pinion shaft assembly out of gearcase.

Remove bearing cup and snap ring from inner por

tion of gearcase only if necessary.

To assemble proceed as follows:

Pin helicon gear on front gear shaft.

Insert front gear shaft assembly into gear case.
Install in helicon pinion shaft assembly and drive in

bearing cup. Use No. 131 Bearing Driver.

Install new seal against shoulder in adjustment plug.
On adjustment nuts, insert the seal so that top of
seal is flush with bottom of the spanner slot or
about 1/32 of an inch below the bottom of the nut.

Use No. 130 Seal Driver.
Seal the adjusting nut in position by putting a

small bed of gasolia sealer in the gear case threads.
The nut will drag the sealer around threads. Tighten
adjustment nut until a slight drag is felt while
turning the pinion shaft.

Use No. 90 Bearing Adjustment Wrench.
Check the oil level in the snow rotar gear case. Tip

machine back on handlebars. Remove filler and
drain plugs. Fill with Ariens Gear Oil (SAE MP90)

until it runs out the drain. Replace drain and filler
plugs.

Remove pipe plug and drain oil. Use 7/16" Open
End Wrench.

Remove cap screws holding flange and remove

flange and gasket.

Insert punch through oil filler hole and drive roll

pin out of helicon gear just far enough to clear
shaft.

Pull out front gear shaft.
After shaft is removed, it is possible to remove

helicon gear by tipping to clear pinion shaft.

8-7

Engine and Headlight

Table of Contents

Page

9.1 Engine Oil...........................................................................................................................9-2

9.2 Engine Cooling.................................................................................................................. 9-2

9.3 Engine Oil Recommendations..........................................................................................9-2

9.4 Headlight.............................................................................................................................9-2

9.5 Engine Air Cleaner.............................................................................................................9-2

9.6 Headlight Assembly...........................................................................................................9-3

9.7 Add-On Alternator..............................................................................................................9-4

List of Illustrations

Page

9-1: Engine Components..........................................................................................................9-1

9-2: Headlight Assembly and Location....................................................................................9-3

9-3: Add-On Alternator..............................................................................................................9-4

Engine and Headlight

1. Engine

2. Hex Cap

3. Nipple

4. Street Elbow

5. Tube

6. Hose Clamp

7. Drain Lock

8. Adapter

9. Nut 5/16-18

10. Lock Washer 5/16

11. Plate

12. Choke

13. Throttle

14. Primer Bulb

15. Spark Plug and Wire

16. Oil Fill and Dipstick

17. Carburator

18. Fuel Tank and Cap

Figure 9-1: Engine Components

9-1

Engine and Headlight

Ariens Dealers will provide any service which may
be required to keep your Sno-Thro operating at
peak efficiency. Should engine service be required,

it can be obtained from an Ariens dealer or an

authorized engine manufacturer's service center.

WARNING: Stop engine, remove key, wait

A

A

9.1 Engine Oil Checking

The engine crankcase oil should be checked daily or
every 5 hours of operation. Oil level MUST be
maintained in safe operating range on dipstick at
all times or engine damage will result.

for moving parts to stop and remove wire
from spark plug (keep wire away from

spark plug to prevent accidental starting)

before any lubrication or maintenance
procedures.

CAUTION: DO NOT touch engine or Sno-

Thro drive parts which are hot from opera
tion. Allow such parts to cool before ser
vicing unit.

crankcase with new oil of proper grade (per engine
manufacturer's instructions). Recheck oil level with
dipstick.

9.2 Engine Cooling

The engine is air cooled. Air must circulate freely
around engine from air intake screen, over cooling
fins on cylinder head and block to prevent over
heating.

Every 100 operating hours or yearly (more often if
conditions require) remove cooling shrouds and
clean cooling fins. Also clean external surfaces of
your engine of dust, dirt and oil deposits which can
contribute to improper cooling.

IMPORTANT: DO NOT operate engine with cooling

shrouds removed - this will cause overheating and
engine damage.

Fill crankcase with oil as recommended below.

Refer also to Engine Manufacturer's Instructions
supplied with the product. Check oil level before
each use and change oil regularly according to
Engine Manufacturer's Instructions.

9.3 Engine Oil Recommendations

To check oil, park Sno-Thro on a flat level surface.
Wipe all debris from around dipstick, remove it and
wipe oil off. Screw dipstick assembly firmly but
slowly until cap bottoms on tube. Remove dipstick
and observe oil level. If low add clean fresh oil, of
same type and viscosity as is in engine, to bring oil

level to Full (F) mark (per engine manufacturer's
instructions).

IMPORTANT: DO NOT overfill. Level must not

exceed full (F) mark.

Changing

IMPORTANT: Change oil after first 5 hours of oper

ation, thereafter change oil every 25 hours of opera

tion (more often in dusty, dirty conditions). See

Engine Manufacturer's Instructions for proper type,

viscosity and amount required.

NOTE: Run engine just prior to changing oil. Oil

will flow more freely and carry away more conta

mination when warm.

Drain crankcase by removing oil drain plug (open
petcock on ST 1136). When oil has drained replace
plug (close petcock on AT 1136) and refill engine

Summer:
(Above 32° F)

Winter SAE 5W20, 5W30 or Substitute:
(Below 32° F) SAE 10W

9.4 Headlight

To replace lamp remove metal ring or remove lamp
from rubber housing.

CAUTION: When handling glass lamp

A

Disconnect electrical plug and assemble new lamp in
reverse order.

NOTE: Be sure headlight assembly is grounded at

headlight bracket for single wire models and at

terminal on two wire models.

9.5 Engine Air Cleaner

IMPORTANT: When using tractor with summer

attachments, install air cleaner and clean element

every 25 hours of operation (more often under

dusty-dirty conditions).

breakage may occur.

SAE 30W or Substitutes:

10W30

9-2

d.6 Headlight

Engine and Headlight

Install headlight bracket (level with floor) on right

handlebar with hardware provided (Figure 10-1).

NOTE; Two washers go between bracket and

handlebar at top hole.

Assemble headlight, bracket and U-bracket with

hardware provided and install onto headlight
bracket.

Position headlight wire harness behind name plate
along handlebar and plug into alternator connector.
Secure harness to handlebar with clips.

9-3

Engine and Headlight

9.7 Add-On Alternator

Remove rewind starter keps nuts and starter from

engine. (Note location of rewind starter handle).

Remove pushout plug from top center of rewind

starter.

On die cast recoils, remove center hole cast material

with 1/4 inch drill.

Rotate pulley to expose 3 punch-outs (Figure 1),

place starter on back-up surface and remove punch­outs with 1/8" punch.

NOTE: Remove quadrant mounting hardware (on
Models 932001, 4, 6 and 7) for additional clearance
when mounting alternator. Secure quadrant when
assembled.

For Use On Sno-Thro Models

Model

924050
924051
924074
924075

Install alternator shaft over crank shaft nut (tap hex
with pipe or light drift until it contacts flywheel
washer) and place centering tube onto alternator
shaft.

NOTE: 3" alternator shaft and short centering tube
are for 932000 Series and ST 524. 4" alternator
shaft and long centering tube are for ST 824. Alter
nator shaft must extend approximately 5/8" beyond
top of starter, if not, incorrect shaft has been in
stalled.

Center rewind starter (using centering tube) and
secure with keps nuts removed earlier.

Remove centering tube and position alternator on
to alternator shaft with lighting connector receptical
to right (as viewed from operator's position).

Serial No.

050501 & Up
000501 & Up
000101 & Up
000101 & Up

Secure alternator to rewind starter with 3 self
tapping screws.

IMPORTANT: DO NOT exceed 15 inch pounds
seating torque (after threads are formed) to prevent
screws from contacting pulley or distorting alter

nator.

9-4

Notes

Attachments

Table of Contents

Page

10.1 Caster Wheels

10.2 Rotary Mower Lubrication.

.....................

List of Illustrations

10-3
10-7

Page

10-1: Rotary Brush ..................................................................................................................10-2

10-2: Rotary Mower Drive....................................................................................................... 10-4

10-3: Rotary Mower Pan..........................................................................................................10-6

Notes

10-1

Attachments

Figure 10-1: Rotary Brush

10-2

81 1 0 /V

82^m 1

\

J

0p%

s'a

Attachments

ITEM

N0.

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20

21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40

41

42

43

DESCRIPTION

Nut 5/16-18

Lock Washer 5/16
Set Screw 1/4-20
Bearing 47
Carriage Bolt 5/16-18 x 3/4
Cap Screw 1/2-13 x 1"

Lock Washer 1/2
Retainer Plate
Brush Selection (Poly)
Cap Screw 3/8-16 x 3-1/2
Cap Screw 3/8-16 x 3"
Hood 55
Core
Cap Screw 5/16-18 x 1"
Washer 5/16 58
Chain 59

Locknut 3/8-16
Idler Arm
Bushing
Cap Screw 3/8-16 x 2"
Chain Tightener
Washer 3/8
Spring

Lock Washer 3/8
Shaft Guard
Brush Frame
Speed Nut 5/16-18
Chain Shield
Cap Screw 3/8-16 x 1"

Lock Nut 3/8-16

Lock Nut 3/8-16
Castor Leg 75
Castor 76
Cap Screw 5/16-18 x 3/4
Shaft
Bearing Flange
Bearing 80
Washer 81

Roll Pin 3/16x1-3/4
Sprocket 83
Spacer
Nut 5/16-18
Cap Screw 3/8-16

ITEM

N0. DESCRIPTION

44
45
46

48
49
50
51
52
53

54

56

57

60
61
62
63
64
65
66
67
68
69
70
71
72
73
74

77
78
79

82

84
85
86

Roll Pin 3/16 X 1-1/2

U-Joint
Drive Shaft
Sprocket
Stiffener Plate
Hub
Sheave
V-Belt

Lock Nut 5/16-18
Set Screw

Ribbed Neck Bolt 5/16-18 x 3/4

Cap Screw 3/8-16 x 1-1/4
Gear Box
Adapter Frame

Retainer Nut

Lock Screw 3/8-16 x 3/4
Woodruff Key 3/16x5/8x5/16
Sprocket
Chain

Extension Spring
Shift Ball
Position Rod
Position Support Bracket

Lock Nut 5/16-18

Lock Screw 5/16-18 x 3/4

Carriage Bolt 5/16-18 x 1-3/8

Release Rod

Clamp
Spacer Bushing
Washer 5/16

Bottom Mount

Latch Bar
Hood Strap
Cap Screw 5/16-18 x 1-1/4

Top Mount
Washer 21/64
Spring

Belt Retainer
Cap Screw 1/4-20 x 1/2

Lock Nut 1/4-20

Lock Nut 3/8-16
Mounting Plate

Washer 11/32

NOTE: Installation of belt retainer required when
brush model 824004 is to be mounted on sno-thro
tractor models 924040 and 924050.

10.1 Caster Wheels

Caster Wheels - Adjust the caster wheels by loosen

ing the cap screw on each side of brush and sliding
the caster wheel support up or down as required.
Casters must be adjusted so that brush cleans
properly, but does not "dive" into the grass and
stall the tractor.

10-3

Attachments

Attachments

ITEM

N0.

1
2 Lockwasher 3/8-.145 x .115
3
4
5
6

7 Washer 1/4 Wrought Plated 51
8
9

10
11
12
13 Nut 5/16-18 Hex Plated
14 Flange Whiziock Screw 5/16-18 x 1/2 58
15
16
17 Belt Guard
18

19
20
21
22
23
24 Axle Bolt 69
25
26 Caster Wheel
27 Belt Small Wheel Tractor
28
29
30
31
32
33
34 Spacer 79
35
36
37
38
39
40
41
43

44

DESCRIPTION

Cotter Pin 1/8 X 1"

Ball Bearing
Woodruff Key No. 9

Nut 3/8-16 Hex Full Plated

Bushing 50

Lockwasher 5/16-.130 x .097

Cap Screw 5/16-18 x 3/4 H.H. 53 Gasket

Link Rod
Lockwasher 3/4-.234 x .188

Nut 3/4-10 Hex Jam Plated

Rear Lift Adapter
Rear Adapter Pin

Snap Ring
Frame 63 Cap Screw 3/8-16 x 1 -1/4

Washer .754 I.D. x 1" O.D. x .032

Zerk Fitting

Washer 67 Washer 7/8

Caster Fork 68

Washer 1"

Spring
Drive Sheave
Swivel Bracket
Snap Ring
Washer
Cap Screw 5/16-18 x 1-3/4

Pulley

Lower Mounting Bracket
Upper Mounting Bracket
Cap Screw 83

External Tooth Lockwasher
Spring

Idler Arm
Pulley

Roll Pin, 1/4x1"

ITEM

NO.

45
46
47
48
49

52

54 Gear Shaft
55
56
57 Snap Ring

59

60
61
62

64

66

70
71
72 Locknut 1/4-20
73
74

75
76 Cap Screw 1/4-20 x 1/2
77 Locknut 1/4-20

78

80
81
82

84
85

86
87

DESCRIPTION

Pinion Shaft
Snap Ring
Bearing Spacer
Bevel Pinion and Gear
Pipe Plug 3/8 Square Head
Setscrew 1/4-20 x 1/2 Socket Head

Expansion Plug
Gear Case

Roll Pin 5/16 X 1-1/4

Woodruff Key No. 11

Bearing Flange
Seal
Brake, w/Lining
Setscrew, 5/16-18 x 3/8 Socket Head
Mounting Bracket

Flange Whiziock Screw 3/8-16 x 1/2
Nut 3/8-16 Hex Jam Plated

Cotter Pin

Shield

Extension Strip

Carriage Bolt 1/4-20

Clevis Pin
Nut
Arm Extension

Twin Whiz Locknut 5/16-18
Brake Lining

Rivet

Gear Case Assembly

Cap Screw 3/8-16 x 3/4
Hub
Ribbed Neck Bolt
Flange Whiziock Nut
Hairpin
Clevis Pin

10-5

Attachments

Figure 10-3: Rotary Mower Pan

Attachments

ITEM

N0.

1
2
3
4 Link Rod
5
6 Lockwasher 3/8
7
8
9 Snap Ring

10

11

12 Woodruff Key No. 9
13 Mower Spindle
14
15
16
17
18

19
20
21
22
23
24
25
26
27 Spring
28
29

DESCRIPTION

Cotter Pin 1/8 X 1"
Shoulder Bolt
Yoke

Yoke Lift Lever

Screw Pin
Snap Ring

Ball Bearing

Roll Pin 1/8x1"

Nut 3/8-16 Hex

Nut 3/8-16 Locknut
Bearing Slinger

Belt
Spindle Sheave

Bearing Housing

Lockwasher 5/16

Ball Bearing
Mower Spindle Housing

Height Control Plunger
Shift Ball

Roll Pin 1/4 X 1-1/4

Height Adjustment Quadrant

Adapter Pin

Front Adapter Pin

ITEM

N0. DESCRIPTION

30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58

Front Lift Adapter
Mower Pan
Plate
Retainer Hub
Cap Screw 3/8-16 x 1 H.H.
Blade Tray
Mower Blade
Lockwasher 3/4
Nut
Reinforcing Strip

Nut 5/16-18
Shoulder Bolt
Chute

Hinge Pin
Bushing
Spring
Cotter Pin
Spacer
Cap Screw 2-1/4-20 X 1/2

Hex Nut 3/8-24

Hex Connector

Lockwasher

Lug Nut

Locknut 5/16-18 X 2"
Cap Screw 5/16-18 x 1/2

Mulcher Kit
Z-Bolt
Washer
Mulcher Bracket

10.2 Rotary Mower Lubrication

Remove belt guard on mower and lubricate spline
shaft on which mower driven sheave is located.
This sheave is to be free to move up and down when
height of mower is moved up and down.

Gear Case - Check gear case oil level approximately
every 8 hours of operation. Oil level should be
within 1/4" of filler hole. Drain and refill gear case

every 100 hours of operation or once each season.

Use Ariens special gear lubrication L-2 (Part No.

000080) (approximately 8 ounces).

Caster Wheel Assembly - Grease fittings are pro
vided on top of caster wheel swivel shaft and on axle

bolt. Grease these four fittings approximately every
8 hours of operation.

10-7

Ask your dealer for information
about these other fine Ariens
products;

Obriens

Ariens Company
655 W. Ryan Street
Brillion,WI 54110-1098