Ariens 939001 ST520E Service manual

Ariens 939001  ST520E Service manual
939 Sno-Thro
Service Manual
Models 939001, 939002, 939300
01920500 12/06
Printed in USA
TABLE OF CONTENTS
5.2
5.3
5.4
5.5
1.0 Introduction . . . . . . . . . . . . . . . . . . . . . . .1-5
1.1 The Manual . . . . . . . . . . . . . . . . . . . . . . .1-5
1.2 Service and Replacement Parts . . . . . . .1-5
1.3 Product Registration . . . . . . . . . . . . . . . .1-5
1.4 Unauthorized Replacement Parts . . . . . .1-5
1.5 Disclaimer . . . . . . . . . . . . . . . . . . . . . . . .1-5
1.6 Technical Service Communications . . . . .1-5
6.0 HandleBars & Controls . . . . . . . . . . . . . 6-20
6.1 Inspect Lower Handlebar . . . . . . . . . . . . 6-20
6.2 Replace Lower Handlebar . . . . . . . . . . . 6-20
6.3 Traction Drive Clutch Lever and Cable . 6-20
6.4 Attachment Control Lever and Cable . . . 6-21
2.0 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6
2.1 Safety Alerts . . . . . . . . . . . . . . . . . . . . . .2-6
2.2 Notations . . . . . . . . . . . . . . . . . . . . . . . . .2-6
2.3 Practices and Laws . . . . . . . . . . . . . . . . .2-6
2.4 Required Operator Training . . . . . . . . . . .2-6
2.5 Safety Decals and Locations . . . . . . . . . .2-6
2.6 Preparation . . . . . . . . . . . . . . . . . . . . . . .2-7
2.7 Service Position . . . . . . . . . . . . . . . . . . . .2-7
2.8 Cleaning and Storage . . . . . . . . . . . . . . .2-8
Safety Rules 8
7.0 Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-22
7.1 Engine Troubleshooting . . . . . . . . . . . . . 7-22
7.2 Engine Removal . . . . . . . . . . . . . . . . . . . 7-25
7.3 Engine Installation . . . . . . . . . . . . . . . . . 7-25
8.0 Transmission . . . . . . . . . . . . . . . . . . . . . 8-26
8.1 Transmission Removal . . . . . . . . . . . . . . 8-26
8.2 Transmission Installation . . . . . . . . . . . . 8-26
9.0 Auger/Impeller . . . . . . . . . . . . . . . . . . . . 9-27
9.1 Auger/Impeller Repair . . . . . . . . . . . . . . 9-27
9.2 Shear Bolts . . . . . . . . . . . . . . . . . . . . . . . 9-27
9.3 Discharge Chute . . . . . . . . . . . . . . . . . . 9-28
9.4 Discharge Chute Crank . . . . . . . . . . . . . 9-29
9.5 Runner and Scraper . . . . . . . . . . . . . . . . 9-30
3.0 Specifications . . . . . . . . . . . . . . . . . . . . . 3-10
4.0 General Maintenance & Adjustments . .
4.1 Controls and Features . . . . . . . . . . . . . .
4.2 Service Position . . . . . . . . . . . . . . . . . . .
4.3 Stopping in an Emergency . . . . . . . . . . .
4.4 Starting and Shutting Off . . . . . . . . . . . .
4.5 Fuel Tank . . . . . . . . . . . . . . . . . . . . . . . .
4.6 Pre-Start . . . . . . . . . . . . . . . . . . . . . . . .
4.7 Maintenance Schedule . . . . . . . . . . . . .
4.8 Attachment Drive Belt Replacement . . .
4.9 Traction Drive Belt Replacement . . . . . .
4.10Shear Bolts . . . . . . . . . . . . . . . . . . . . . .
4.11 Tire Pressure . . . . . . . . . . . . . . . . . . . . .
Discharge Chute . . . . . . . . . . . . . . . . . . 5-17
Runners . . . . . . . . . . . . . . . . . . . . . . . . . 5-18
Attachment Clutch/Brake Adjustment . . 5-18
Traction Drive Clutch Adjustment . . . . . . 5-19
4-11
4-11
4-12
4-12
4-12
4-13
4-13
4-14
4-15
4-16
4-17
4-17
10.0 Gear Case . . . . . . . . . . . . . . . . . . . . . . . 10-31
10.1 Aluminum Gear Case . . . . . . . . . . . . . 10-31
Service Parts List . . . . . . . . . . . . . . . . . . . . . . .32
5.0 Service and Adjustments . . . . . . . . . . . 5-17
5.1 Discharge Chute Deflector . . . . . . . . . . 5-17
2
Ariens Company
EC DECLARATION OF CONFORMITY ISSUED BY THE MANUFACTURER DÉCLARATION
DE CONFORMITÉ CE ÉMISE PAR LE FABRICANT –
655 West Ryan Street
EU-ÜBEREINSTIMMUNGSERKLÄRUNG DES HERSTELLERS – DICHIARAZIONE DI
CONFORMITÀ CE RILASCIATA DAL PRODUTTORE – DECLARACIÓN DE
P.O. Box 157
Brillion, Wisconsin 54110- CONFORMIDAD CE EMITIDA POR EL FABRICANTE – EF-SAMSVARSERKLÆRING FRA
PRODUSENTEN – EG-DEKLARATIONEN OM ÖVERENSSTÄMMELSE UTFÄRDAD
0157 USA
AV TILLVERKAREN –
VALMISTAJAN ANTAMA EY-VAATIMUSTENMUKAISUUSVAKUUTUS – DEKLARACJA
Telephone
ZGODNOŒCI Z PRZEPISAMI EC WYDANA PRZEZ PRODUCENTA – PROHLÁŠENÍ O SHODÌ
(920) 756-2141
CE, VYDANÉ VÝROBCEM
Facsimile
(920) 756-2407
We the undersigned, ARIENS COMPANY, certify that: Nous, soussignés ARIENS COMPANY, certifions que : Der
Unterzeichnete, ARIENS COMPANY, bescheinigt, dass: La sottoscritta società ARIENS COMPANY certifica che: Nosotros,
los abajo firmantes, ARIENS COMPANY, certificamos que: Undertegnede, ARIENS COMPANY, bekrefter at: Undertecknad,
ARIENS COMPANY, intygar att: Allekirjoittanut, ARIENS COMPANY, vakuuttaa, että: My, niŸej podpisani, ARIENS
COMPANY, oœwiadczamy, ¿e: My, nížepodepsaní, ARIENS COMPANY, prohlašujeme, že:
Type: Type : Typ: Tipo: WALK BEHIND SNOW THROWER – LES CHASSES-NEIGE AUTOTRACTÉS –
Tipo: Type: Typ:
HANDGEFÜHRTE SCHNEEFRÄSE – SPAZZANEVE SEMOVENTE – CAMINAR POR DETRÁS
Tyyppi: Typ: Typ:
DE LA LANZADORA DE NIEVE – SNØFRESER – SJÄLVGÅENDE SNÖSLUNGA –
KÄSINOHJAILTAVA LUMILINKO – ODGARNIACZ ŒNIEGU DO PROWADZENIA PRZED
SOB¥ – SNÌHOVÁ FRÉZA S POJEZDEM
Trade Name: Appellation commerciale : Handelsbezeichnung: Nome
Ariens
commerciale: Nombre comercial: Handelsnavn: Handelsbeteckning:
Kauppanimi: Nazwa handlowa: Obchodní název:
Model: Modèle : Modell: Modello: Modelo: Modell: Modell: Malli:
939300
Model: Model:
Conforms to: Est conforme à : Mit den Anforderungen der folgenden Richtlinien übereinstimmt: È conforme a: Cumple con:
Er i samsvar med: Överensstämmer med: Täyttää seuraavat vaatimukset: Jest zgodny z: Odpovídá normì:
98/37/EC, 89/336/EEC,
2000/14/EC Conformity Assessment Annex V. Annexe V de l'évaluation de conformité. Konformitätsbewertung, Anhang V.
Annesso V della valutazione di conformità. Anexo V de la evaluación de la conformidad. Samsvarsvurdering etter vedlegg V.
Bedömning av överensstämmelse Bilaga V. Vaatimustenmukaisuuden arviointi, liite V. Dodatek V, Ocena zgodnoœci. Posouzení
shody pøíloha V.
Representative Measured Sound Power Level (Lwa) –
Niveau de puissance acoustique représentatif mesuré (Lwa) –
Repräsentativer gemessener Geräuschpegel (Lwa) – Livello
di potenza sonora rappresentativo rilevato (Lwa) – Nivel de
potencia acústica representativo medido (Lwa) –
Representativt målt lydeffektnivå (Lwa) – Representativ
uppmätt ljudnivå (Lwa) – Tyypillinen mitattu äänitehotaso
(Lwa) – Zmierzony reprezentatywny poziom mocy akustycznej
(Lwa) – Representativní hodnota zmìøené hladiny hluènosti (Lwa)
–
939300: xxx dBA
Guaranteed Sound Power Level (Lwa) –
Niveau de puissance acoustique garanti (Lwa) – Garantierter
Geräuschpegel (Lwa) – Livello di potenza sonora garantito
(Lwa) – Nivel de potencia acústica garantizado (Lwa) –
Garantert lydeffektnivå (Lwa) – Garanterad uppmätt ljudnivå
(Lwa) – Taattu
äänitehotaso (Lwa) – Gwarantowany reprezentatywny poziom
mocy akustycznej (Lwa) – Zaruèovaná hodnota hladiny hluènosti
(Lwa) –
939300: xxx dBA
3
Fred J. Moreaux:
Quality and Conformance Manager
(Keeper of Technical File)
Responsable de la qualité et de la
conformité des produits (Dépositaire
de la fiche technique) Manager
Qualitätssicherung und Konformität
(Archivar der technischen Akte)
Responsabile della qualità e della
conformità del prodotto
(Depositario del file tecnico) Gerente
de calidad y conformidad
(Depositario del archivo técnico)
Kvalitet- og samsvarsansvarlig
(innehaver av tekniske data) Chef för
kvalitet och produktöverensstämmelse
(Innehavare av tekniska data)
Laadusta ja
vaatimustenmukaisuudesta vastaava
päällikkö (Teknisen tiedoston haltija)
Kierownik do spraw jakoœci i zgodnoœci
(Przechowuj¹cy Dokumentacjê
Techniczn¹) Manager jakosti a shody
(správce technické dokumentace)
Ariens Company
Brillion, WI 54110-0157 USA
Signature Signature Unterschrift
Firma Firma Signatur Namnteckning
Allekirjoitus Podpis Podpis
xx/xx/2006
Date Date Datum Data Fecha Dato
Datum Päiväys Data Datum
CE Sound and Vibration – Niveau sonore et vibration CE – CE-Geräuschpegel und
Vibrationswerte – Livello sonoro e vibrazioni CE – Sonido y vibración CE – CE-lydnivå og
Vibrasjonsmåling – CE ljudnivå och Vibrations-mätning – CE-melutaso Tärinä – CE DŸwiêku i
Wibracji – CE zvuk a vibrace
Model: – Modèle : – Modell: – Modello: – Modelo: – Modell: – Modell: –
Malli: – Model: – Model:
Oper. Ear Sound Pressure (Lpa) in dBA – Pression acoustique Pression
sonore à aux oreilles de l’opérateur (Lpa) en dBA – Geräuschstärke am Ohr
des Bedieners (Lpa) in dBA – Potenza sonora percepita dall’operatore
(Lpa) in. dBA – Presión de sonido en el oído (Lpa) in dBA – Lydtrykk i
førerens øre (Lpa) in. dBA – vid förarens position (Lwa) i dBA – Kuljettajan
korvaan kohdistuva äänipaine (Lpa)/dBA – Robocze ciœnienie akustyczne na
uchu (Lpa) w decybelachA – Provozní hladina akustického tlaku (Lpa) v dBA
939300
xx
2
Vibration Measure (m/sec ) @ Operator Hands – Niveau de vibrationaux
mains de l’opérateur – Vibrationswerte An den Händen des Bedieners –
Misura delle vibrazioni alle mani dell’operatore – Cantidad de vibración en
las manos del operador – Vibrasjonsmåling ved brukerens hender –
Vibrationsmätning vid förarens händer – Tärinä kuljettajan käsissä – Pomiar
wibracji (m/sec2) na rêkach operatora – Hodnota vibrací (m/s2) na rukou obsluhy
4
x.x
SECTION 1 - INTRODUCTION
1.1 THE MANUAL
1.3 PRODUCT REGISTRATION
This manual provides complete instructions for service,
maintenance, disassembly, repair, and installation of
the mechanical components for the 939 Snow-Thro.
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.
Dealer trained service personnel should use this
manual as a supplement to and reminder of the training
sessions conducted by the company.
Read all information for servicing a part of system
before repair work is started to avoid needless
disassembly.
Customer Note: If the dealer does not register your
product, please fill out, sign, and return the product
registration card to Ariens or go to www.ariens.com.
Operation
Before operation of the 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.
1.4 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.
Safety Messages
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.
Directional Reference
1.5 DISCLAIMER
All reference to left, right, front, or rear are given from
the operator in the operator position and facing the
direction of forward travel.
1.2 SERVICE AND REPLACEMENT PARTS
When ordering publications, replacement parts, or
making service inquiries, know the Model and Serial
numbers of your unit and engine.
Product model and serial numbers are located on the
product registration form in the unit literature package.
They are printed on a serial number label, located on
the frame of your unit as shown in Figure 1.
Serial Number
Label
OS7330
Ariens reserves the right to discontinue, make changes
to, and add improvements upon its products at any
time without public notice or obligation. The
descriptions and specifications contained in this
manual were in effect at printing. Equipment described
within this manual may be optional. Some illustrations
may not be applicable to your unit.
1.6 TECHNICAL SERVICE
COMMUNICATIONS
Ariens Technical Service communicates information to
the field using Service Letters, Service Bulletins,
Product Notices, and Campaigns. Each
communication signifies a type of information and
priority. The dealer is responsible to carry out the
directive provided in the communication. The types of
communication are:
Figure 1
1-5
Service Letter - General technical information for the
dealer. Technical information on how to service the
product and product improvements.
Product Notices - Notification of limited product
located in a certain region. This is a limited distribution
to only those who received the product involved.
Service Bulletin - Notification to update products to
resolve certain issues or a notification of a policy
change.
Campaigns - Notification of a safety related issue. All
product must be updated and are tracked by the
factory until all units are corrected.
SECTION 2 - SAFETY
2.1 SAFETY ALERTS
2.3 PRACTICES AND LAWS
Practice usual and customary safe working
precautions, for the benefit of yourself and others.
Understand and follow all safety messages. Be alert to
unsafe conditions and the possibility of minor,
moderate, or serious injury or death. Learn applicable
rules and laws in your area. Always follow the practices
set forth in this manual.
WARNING: To avoid injury to hands and feet,
always disengage clutches, shut off engine,
and wait for all movement to stop before
unclogging or working on snow thrower.
Hand contact with the rotating impeller is the
most common cause of injury associated with
snow throwers. Never use your hand to clean
out the discharge chute.
2.4 REQUIRED OPERATOR TRAINING
Keep hands and feet away from auger and
impeller.
Original purchaser of this unit was instructed by the
seller on safe and proper operation. If unit is to be used
by someone other than original purchaser; loaned,
rented or sold, ALWAYS provide this manual and any
needed safety training before operation.
Look for these symbols to point out
important safety precautions. They mean:
Attention!
Personal Safety Is Involved!
2.5 SAFETY DECALS AND LOCATIONS
Become Alert!
ALWAYS replace missing or damaged Safety Decals.
Refer to Figure 2 for Safety Decal locations.
Obey The Message!
The safety alert symbols above and signal
words below are used on decals and in this manual.
Read and understand all safety messages.
DANGER: IMMINENTLY HAZARDOUS
SITUATION! If not avoided, WILL RESULT in
death or serious injury.
WARNING: POTENTIALLY HAZARDOUS
SITUATION! If not avoided, COULD RESULT in
death or serious injury.
CAUTION: POTENTIALLY HAZARDOUS
SITUATION! If not avoided, MAY RESULT in
minor or moderate injury. It may also be used to
alert against unsafe practices.
2.2 NOTATIONS
OS7340
NOTE: General reference information for proper operation and maintenance practices.
IMPORTANT: Specific procedures or information
required to prevent damage to unit or attachment.
2-6
Figure 2
WARNING!
DANGER!
Read Owner/Operator Manual.
ROTATING PARTS.
Keep clear of auger while engine is
running.
OL1801
OS2080
OL4370
Keep people away from unit while
operating. Keep children out of work
area and under watchful care of a
responsible adult.
• Allow operation only by properly
trained adult, never children.
Never direct discharge towards persons
or property that may be injured or
damaged by thrown objects.
• Keep all controls, guards and safety
devices properly serviced and
functional.
• Stop engine and remove ignition key
prior to leaving the operator’s
position for any reason.
• Never direct discharge towards
persons or property that may be
injured or damaged by thrown
objects.
OL0910
Stop engine, remove key, read manual
before making any repairs or
adjustments.
OL4010
Wear appropriate hearing protection.
OL4690
ONLY use clean-out tool to clear
blockages. NEVER use your hands.
OL6610
2. DANGER!
OS6610
• Read Operator’s Manual.
ROTATING PARTS! ONLY use clean-out
tool to clear blockages. NEVER use your
hands. High speed impeller rotates
below discharge opening. Wait for all
moving parts to stop before removing
clogs or servicing.
2.6 PREPARATION
Proper preparation is very important for efficient work
before you start to remove any parts. A clean work
area at the beginning of each job will allow you to
perform service repairs easily and quickly.
To reduce the incidence of misplaced tools or parts,
place removed components with all attaching hardware
in the disassembly order on a clean work surface.
Organization is a key part of proper reassembly.
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.
2.7 SERVICE POSITION
WARNING: ALWAYS block wheels and know
that jack stands or blocks used are stable,
strong, secure and will hold the weight of the
unit during maintenance.
To ensure the unit is positioned in the proper service
position place unit on a flat level surface. ALWAYS stop
engine. Assure unit is secure and will not tip over. Strap
and clamp onto lift if used.
See Service Position in General Maintenance for
specific instructions.
1-7
2.8 CLEANING AND STORAGE
ALWAYS check overhead and side clearances
carefully before operation. ALWAYS be aware of traffic
when operating along streets or curbs.
WARNING: AVOID SHARP EDGES which
can cut. Movement of parts can cut off fingers
or a hand. Wear gloves, and use extreme
caution when servicing.
Keep children and people away. Keep children out of
work area and under watchful care of a responsible
adult.
IMPORTANT: Never spray unit with water or store unit
outdoors to help prevent sealed bearing rust or
corrosion. Water can seep into sealed bearings and
reduce component life. Bearings are sealed against dirt
and debris only.
A unit that is excessively dirty should be cleaned
before work starts. Cleaning will occasionally uncover
trouble sources. Dirt and abrasive dust reduce the
efficient work life of parts and can lead to costly
replacement.
DO NOT allow adults to operate unit without proper
training. Only trained adults may operate unit. Training
includes actual operation.
Keep area of operation clear of all toys, pets, and
debris. Thrown objects can cause injury.
Check for weak spots on docks, ramps or floors. Avoid
uneven work areas and rough terrain. Stay alert for
hidden hazards.
DO NOT operate near drop-offs, ditches, or
embankments. Unit can suddenly turn over if a wheel is
over the edge of a cliff or ditch, or if an edge caves in.
When taking unit out of extended storage:
1. Check for any damage or loose parts. Repair,
replace, or tighten hardware before operation.
Falling snow, fog, etc. can reduce vision and cause an
accident. Operate unit only when there is good visibility
and light.
2. If a preservative fluid was used in fuel tank, drain
and discard. Fill fuel tank with fresh new fuel.
NEVER operate unit after or during the use of
medication, drugs or alcohol. Safe operation requires
your complete and unimpaired attention at all times.
ROTATING PARTS.
Keep clear of auger while engine is
running.
OS2080
NEVER allow children to operate or play on or near
unit. Be alert and shut off unit if children enter area.
NEVER allow anyone to operate this unit when his or
her alertness or coordination is impaired.
• Read Operator’s Manual.
• Allow operation only by properly
trained adult, never children.
DO NOT operate unit without wearing adequate winter
outer garments. Wear adequate safety gear, including
safety glasses with side shields, and protective gloves.
Wear proper footwear to improve footing on slippery
surfaces.
• Stop engine and remove ignition key
prior to leaving the operator’s
position for any reason.
• Keep all controls, guards and safety
devices properly serviced and
functional.
DO NOT wear loose clothing or jewelry and tie back
hair that may get caught in rotating parts.
Protect eyes, face and head from objects that may be
thrown from unit. Wear appropriate hearing protection.
• Never direct discharge towards
persons or property that may be
injured or damaged by thrown
objects.
Avoid sharp edges. Sharp edges can cut. Moving parts
can cut off fingers or a hand.
2.9 SAFETY RULES
Read, understand, and follow all safety practices in
Owner/Operator Manual before beginning assembly or
operating. Failure to follow instructions could result in
personal injury and/or damage to unit.
ALWAYS keep hands and feet away from all rotating
parts during operation. Rotating parts can cut off body
parts.
NEVER place your hands or any part of your body or
clothing inside or near any moving part while unit is
running.
ALWAYS remove key and/or wire from spark plug
before assembly, maintenance or service.
Unintentional engine start up can cause death or
serious injury.
ALWAYS keep hands away from all pinch points.
Complete a walk around inspection of unit and work
area to understand:
Never direct discharge towards persons or property
that may be injured or damaged by thrown objects. Use
extreme caution on gravel surfaces. Stay alert for
hidden hazards or traffic. Adjust runners so scraper
blade does not contact gravel. DO NOT use on gravel
or crushed rock surfaces.
• Work area • Your unit • All safety decals
DO NOT touch unit parts which might be hot from
operation. Allow parts to cool before attempting to
maintain, adjust or service.
1-8
DO NOT throw snow any higher than necessary.
Never carry passengers.
Deflected materials can cause injury and property
damage.
Check clutch and brake operation frequently. Adjust
and service as required. All motion of drive wheels and
auger/impeller must stop quickly when control levers
are released.
Always stand clear of the discharge area when
operating this unit.
Fumes from engine exhaust can cause injury or death.
DO NOT run engine in an enclosed area. Always
provide good ventilation.
ALWAYS disengage attachment, stop unit and engine,
remove key and allow moving parts to stop before
leaving operator’s position.
ROTATING IMPELLER AUGER CAN CAUSE
SERIOUS INJURY. NEVER ATTEMPT TO UNCLOG
OR CLEAN UNIT WHILE ENGINE IS RUNNING.
DO NOT operate on steep slopes. DO NOT clear snow
across the face of slopes. Keep all movement on
slopes slow and gradual. DO NOT make sudden
changes in speed or direction. Use a slow speed to
avoid stops or shifts on slopes. Avoid starting or
stopping on a slope.
DO NOT park unit on a slope unless absolutely
necessary. When parking on a slope always block the
wheels.
Use extra care when loading or unloading unit onto
trailer or truck.
Read, understand, and follow all instructions in the
manual and on the machine before starting.
Secure unit chassis to transport vehicle. NEVER
secure from rods or linkages that could be damaged.
Understand:
• How to operate all controls.
DO NOT transport machine while engine is running.
• The functions of all controls.
Keep unit free of ice or other debris. Clean up oil or fuel
spills.
• How to STOP in an emergency.
Before starting engine, disengage control(s).
Use only approved extension cords and receptacles
when starting units equipped with electric starter. DO
NOT connect electric starter cord to any wiring system
that is not a three-wire grounded system.
ALWAYS allow unit and engine to adjust to outdoor
temperatures before clearing snow.
This product is equipped with an internal combustion
type engine. DO NOT use unit on or near any
unimproved, forest-covered or brush covered land
unless exhaust system is equipped with a spark
arrester meeting applicable local, state or federal laws.
A spark arrester, if it is used, must be maintained in
effective working order by operator.
Fuel is highly flammable and its vapors are explosive.
Handle with care. Use an approved fuel container.
Always be sure of your footing, especially when
operating in reverse or leaving the operator’s position.
Walk, never run, during operation.
DO NOT overload the machine capacity by attempting
to clear snow at too fast a rate.
Slow down and turn corners slowly.
Do not operate in reverse unless absolutely necessary.
ALWAYS back up slowly. Always look down and behind
before and while backing.
NO smoking, NO sparks, NO flames. ALWAYS allow
engine to cool before servicing.
NEVER fill fuel tank when engine is running or hot from
operation.
NEVER fill or drain fuel tank indoors.
Replace fuel cap securely and clean up spilled fuel.
Disengage attachment drive when traveling from one
work area to another.
Never fill containers inside a vehicle or on a truck or
trailer bed with a plastic liner. Always place containers
on the ground away from your vehicle before filling.
Abnormal vibrations are a warning of trouble. Striking a
foreign object can damage unit. Immediately stop unit
and engine. Remove key and wait for all moving parts
to stop. Remove wire from spark plug. Inspect unit and
make any necessary repairs before restart.
When practical, remove gas-powered equipment from
the truck or trailer and refuel it on the ground. If this is
not possible, then refuel such equipment on a trailer
with a portable container, rather than from a gasoline
dispenser nozzle.
Before cleaning, removing clogs or making any
inspections, repairs, etc.: disengage clutch(es), stop
unit and engine, remove key, allow moving parts to
stop. Allow hot parts to cool.
Keep the nozzle in contact with the rim of the fuel tank
or container opening at all times until fueling is
complete. Do not use a nozzle lock-open device.
If fuel is spilled on clothing, change clothing
immediately.
Run unit a few minutes after clearing snow to prevent
freeze-up of attachment.
Never leave a running unit unattended. Shut off engine
before leaving unit. ALWAYS remove key to prevent
unauthorized use.
Before tipping unit up onto housing, remove fuel so no
spills will occur. Ensure unit is secure and will not tip
over during maintenance.
1-9
ALWAYS keep protective structures, guards, and
panels in good repair, in place and securely fastened.
NEVER modify or remove safety devices.
Maintain or replace safety and instruction labels, as
necessary.
DO NOT change engine governor settings or overspeed engine.
Fumes from engine exhaust can cause injury or death.
DO NOT run engine in an enclosed area. Always
provide good ventilation.
ALWAYS maintain unit in safe operating condition.
Damaged or worn out muffler can cause fire or
explosion.
Keep all hardware properly tightened. Check shear
bolts frequently. Check slip clutch on units so
equipped.
NEVER store unit with fuel in fuel tank, inside a
building where any ignition sources are present such
as hot water heaters, space heaters, or clothes dryers.
Allow the engine to cool before storing in any
enclosure.
For extended storage, clean unit thoroughly. See
Engine Manual for proper storage.
Use only attachments or accessories designed for your
unit.
Check components frequently. If worn or damaged,
replace with manufacturer’s recommended parts.
SECTION 3 - SPECIFICATIONS
Model Number
939001
939002
939300
Description
ST520E
ST520
ST520
Engine - Tecumseh
LH195SA
LH195SA
OH195SA
Engine Power – hp (kW) at Maximum RPM
5.0 (3.7)
5.0 (3.7)
5.9 (3.7)
Fast Idle Speed-RPM (min-1)
3600 ± 150
Displacement - in. (cc)
11.88 (195)
Electric Start
120V
Fuel
Recoil
Recoil
See Engine Manual
Tank Capacity - qt. (L)
2.0 (1.96)
Snow Clearing Width - in. (cm)
3.0 (2.8)
20 (50.8)
Chute
200°
Rotation Angle
Impeller
Diameter - in. (cm)
12 (30.5)
1200
Speed-RPM-Max (min-1)
Auger
Diameter - in. (cm)
11.0 (27.98)
Speed-RPM-Max (min-1)
120
Auger Brake
Yes
Drive
Clutching Wet Sump Gearbox
Speeds
1 Forward
Pneumatic Tires - in.
10
Size and Weight
Height - in. (cm)
43.13 (109.53)
Length - in. (cm)
51.25 (130.18)
Width - in. (cm)
22.38 (56.84)
Weight - lb (Kg)
125 (56.7)
3 - 10
120 (54.4)
121 (54.8)
SECTION 4 - GENERAL MAINTENANCE & ADJUSTMENTS
4.1 CONTROLS AND FEATURES
1
2
3
4
5
23
6
12
7
11
8
9
22
10
OS7350
OS7355
21
13
12
20
19
14
18
17
16
15
Figure 3
4 - 11
1. Attachment Clutch Lever
2. Traction Drive Clutch Lever
3. Chute Handle (939001, 002)
4. Discharge Chute Deflector
5. Discharge Chute
6. Impeller
7. Clean-Out Tool
8. Auger
9. Scraper Blade
10. Auger Gear Case
11. Oil Fill and Dipstick
12. Gas Tank and Cap
13. Electric Starter (939001)
14. Recoil Starter Handle
15. Primer Bulb
16. Oil Drain Plug
17. Throttle (Engine Stop)
18. Ignition Switch (push-pull)
19. Choke
20. Spark Plug and Wire
21. Runner(s)
22. Belt Cover
23. Handlebar
Ariens dealers provide any service or adjustments
required to keep your unit operating at peak efficiency.
Should engine service be required, contact an Ariens
dealer or an authorized engine manufacturer's service
center.
WARNING: AVOID INJURY. Read and
understand the entire Safety section before
proceeding.
WARNING: FAILURE TO FOLLOW
INSTRUCTIONS could result in personal injury
and/or damage to unit. DO NOT attempt to start
your unit at this time. Read entire Owner/
Operator Manual and the Engine Manual first.
IMPORTANT: Allow unit and engine to adjust to
outdoor temperatures before clearing snow. Before
shut-off, run the attachment a few minutes to prevent
freeze-up.
4.2 SERVICE POSITION
WARNING: Before tipping unit up onto housing,
remove fuel so no spills will occur and remove
battery (if equipped). Ensure unit is secure and
will not tip over during maintenance.
IMPORTANT: Try each control without the engine
running to see how it works and what it does.
Manual Start
1. Turn discharge chute straight ahead.
Place unit on a flat level surface. Tip machine forward
onto front of impeller housing for service as shown in
Figure 4. Assure unit is secure and will not tip over.
Strap and clamp onto bench if needed.
2. Make sure that the traction clutch and attachment
drive clutch levers are fully disengaged.
3. Push primer bulb 2 or 3 times for cold engine.
NOTE: Machine should remain in horizontal position to
service attachment and drive belts. Do not tip machine
forward.
Service Position
4.4 STARTING AND SHUTTING OFF
NOTE: When temperature is below -15° F (-26° C)
additional priming may be needed.
4. If engine is cold, apply choke. See Engine Manual
for detailed instructions.
NOTE: A warm engine requires less choking than a
cold engine.
5. Set throttle to proper starting position.
6. Insert key into ignition switch and push into RUN
position. DO NOT twist key after it is inserted.
7. Grasp starter handle and pull rope out slowly until it
pulls harder. Let rope rewind slowly.
8. Pull rope with a rapid continuous full arm stroke.
Let rope rewind slowly.
IMPORTANT: DO NOT let starter handle snap against
starter.
9. Repeat steps 7 and 8 until engine starts. (If engine
does not start, refer to Troubleshooting.)
10.Adjust choke as needed.
11.Set throttle to PART THROTTLE or SLOW position
for adaptation to outside temperature or travel. Set
throttle to FAST position for normal operation.
OS7125
Electric Start
Figure 4
4.3 STOPPING IN AN EMERGENCY
Immediately release both control levers to stop unit in
an emergency. Stop engine, remove key and wait for
all rotating parts to stop before leaving operator’s
position.
1. Connect extension cord to prongs on starter.
IMPORTANT: Prevent damage to unit. Know voltage of
your starter and use only matching outlets.
2. Plug extension cord into 120V or 240V 3-wire,
grounded outlet.
3. Turn discharge chute straight ahead.
4. Make sure that the traction clutch and attachment
drive clutch levers are fully disengaged.
5. Push primer bulb 2 or 3 times for cold engine.
NOTE: When temperature is below -15° F (-26° C)
additional priming may be needed.
4 - 12
6. Insert key into ignition switch on engine and push
into RUN position. DO NOT twist key after it is
inserted.
7. ALWAYS clean up any spilled fuel.
WARNING: POTENTIAL HAZARD! Fuel is
extremely flammable and highly explosive.
Personal injury and property damage may
result if not handled properly.
7. If engine is cold, apply choke. A warm engine
requires less choking than a cold engine. See
Engine Manual for detailed instructions.
8. Set throttle to proper starting position.
• Fill the fuel tank outdoors in an open area.
9. Press starter button on engine until engine starts.
• Do not fill when the engine is hot. Wipe up
any fuel spills.
IMPORTANT: DO NOT operate starter more than 15
seconds per minute, as overheating and damage can
occur. (If engine does not start, refer to
Troubleshooting.)
• Never fill the fuel tank completely full.
Empty space in tank allows fuel to
expand.
• Never smoke when handling fuel. Stay
away from open flames. Fuel fumes can
be ignited by sparks.
10.Adjust choke as needed.
11.Disconnect extension cord from outlet first, then
starter.
12.Set throttle to PART THROTTLE or SLOW position
for travel or adaptation to outside temperature.
Once achieved, set throttle to FAST position for
normal operation.
Shut Off
1. Release traction drive clutch lever and allow unit to
come to a complete stop.
2. Run Impeller a few minutes after use to keep
impeller from freezing up.
4.6 PRE-START
Frozen Impeller
IMPORTANT: Before starting engine, check impeller to
be sure it is not frozen.
To check impeller:
1. With key in STOP position, squeeze attachment
clutch lever to engaged position.
2. Pull recoil starter handle. If you cannot pull handle,
impeller is frozen.
3. Release attachment clutch lever and wait for all
moving parts to come to a complete stop.
3. If impeller is frozen, move unit to a heated area
and thaw to prevent possible damage.
4. Move throttle to STOP position.
5. Remove key.
4.5 FUEL TANK
To add fuel to the fuel tank:
1. ALWAYS place unit in open or well- ventilated area.
2. Stop engine and allow to cool.
3. Clean fuel cap and surrounding area to prevent dirt
from entering fuel tank.
4. Remove cap.
IMPORTANT: DO NOT use gasohol or gasoline
containing alcohol. See Engine Manual for correct type
and grade of fuel.
5. Fill fuel tank to within 1/2 in. (1.2 cm) below bottom
of filler neck with unleaded gasoline.
NOTE: Tank capacity is 2.0 (1.96) for 939001 or
939002, 3.0 (2.8) for 939300.
6. Replace fuel cap and tighten.
4 - 13
4.7 MAINTENANCE SCHEDULE
Change Engine Oil
The chart below shows the recommended
maintenance schedule that should be performed on a
regular basis. More frequent service may be required.
Change oil after first 2 hours of operation; thereafter,
change oil every 25 hours (more often if required).
Refer to Engine Manual for detailed instructions.
Service Performed
Each
Use
Check Fasteners
•
Check Clutch
Operation
•
Check Clutch
Spring
Adjustments
Clean Engine
Every 5
hr
Every
25 hr
Run engine a few minutes just before changing oil.
Warm oil will flow more freely and carry away more
contamination. Place a suitable container under the oil
drain plug. Remove the oil drain plug from the rear of
the unit and tip the unit back to help drain all the oil.
Yearly
Check Tire Pressure
*
Keep tires at pressure listed on the tire sidewall.
•
Check Auger Gear Case
IMPORTANT: Proper oil level must be maintained.
•
Check Engine Oil
•
Change Engine
Oil
**
Gear cases are filled to the correct level at the factory.
Unless there is evidence of leakage, no additional
lubricant should be required. Check oil level each
season or every 25 hours of operation.
•
Check Tire
Pressure
•
Check Auger
Gear Case
•
•
General
Lubrication
•
•
To ensure adequate lubricant level:
1. Remove filler plug (Figure 5). Lubricant must be at
least up to bottom of lubricant filler hole with unit
resting on a level-surface.
2. Add lubricant if required. Allow oil to drain to level
of plug and replace plug.
* After first five hours of operation.
** After first two hours of operation.
IMPORTANT: Use only Ariens special gear lubricant
L-2 (Part Number 00008000). Gear case filler plug may
require an application of Loc-Tite® 565 thread sealant
with repeated servicing.
Check Fasteners
Make sure all hardware is tightened properly.
Check Clutch Operation
OS1870
Auger and impeller must stop within 3 seconds when
attachment clutch/impeller brake lever is released.
1
Wheels must stop quickly when traction drive clutch
lever is released.
3
If clutches do not engage or disengage properly, adjust
or repair before operation (see “Attachment Clutch/
Brake Adjustment” on page 18 or “Traction Drive
Clutch Adjustment” on page 19).
1. Auger Gear Case
2. Filler Plug
3. Auger Shaft
Check Clutch Spring Adjustment
Make sure the attachment clutch and traction drive
clutch are adjusted to the range specified in
“Attachment Clutch/Brake Adjustment” on page 18 or
“Traction Drive Clutch Adjustment” on page 19
3
2
Figure 5
General Lubrication
IMPORTANT: Wipe each fitting clean before and after
lubrication. Do not wipe gear case filler plug; wiping the
gear case filler plug may remove thread sealant and
cause leaks.
Clean Engine
Refer to Engine Manual for detailed instructions.
Check Engine Oil
Check engine crankcase oil every 5 hours of operation.
Oil level MUST be maintained in safe operating range
on dipstick at all times or engine damage will result
(See Engine Manual).
Park unit on a level surface. Refer to Engine Manual for
detailed instructions.
IMPORTANT: DO NOT allow grease or oil to get on the
belts.
NOTE: Apply Ariens Hi-Temp Grease or equivalent to
the lubrication fittings. See “Service Parts List” on
page 32.
Lubricate Sno-Thro at the beginning of the season or
every 25 operating hours, whichever comes first.
4 - 14
Auger Shaft
To grease auger shaft, remove shear bolt nuts and
shear bolts. Apply grease at the grease zerks and then
rotate the auger shaft. Replace shear bolts per
instructions in “Shear Bolts” on page 17.
1
2
Grease Oil
3
OS7400
4
5
1. Blower Housing
2. Belt Cover
3. Frame
4. Belt Cover Screw
5. Housing Bolt Holes
OS1374
Figure 7
Figure 6
4.8 ATTACHMENT DRIVE BELT
REPLACEMENT
2
3
1
Remove Attachment Drive Belt
(Figures 7 and 8)
1. Shut off engine, remove key, disconnect spark plug
wire and allow unit to cool completely.
2. Remove two screws securing belt cover to unit and
remove belt cover.
3. Remove belt fingers by removing cap screws
mounting belt fingers to engine (Figure 8).
6
6
CAUTION: Always support Sno-Thro frame
and housing when loosening the cap screws
holding them together. Never loosen cap
screws while unit is in service position.
IMPORTANT: To avoid bending bottom cover, remove
the cover before separating the blower housing from
the unit.
4. Support Sno-Thro frame and housing.
5. Remove top two cap screws and loosen lower two
cap screws holding blower housing to frame (one
on each side).
6. Remove attachment drive belt from engine sheave
(it may be necessary to turn engine sheave using
recoil starter handle).
7. Separate housing from unit. Lower handlebar to
floor.
8. Remove attachment drive belt from lower pulley.
4 - 15
4
5
OS7410
1. Attachment Drive Belt
2. Engine Sheave
3. Traction Drive Belt
4. Attachment Idler Nut
5. Attachment Belt Idler
6. Belt Finger
Figure 8
NOTE: To make belt removal easier, slowly pull the
recoil starter while pushing the traction drive belt off the
engine pulley.
Replace Attachment Drive Belt
1. Place new belt onto lower pulley.
2. While holding brake out of way, tip unit together.
NOTE: Engage attachment clutch lever while connecting housing to frame to hold brake out of the way.
3. Attach blower housing to frame with cap screws
removed in step 5 of “Remove Attachment Drive
Belt” on page 15.
4. Place belt onto engine sheave.
5. Replace belt fingers.
NOTE: Slowly pull the recoil starter while pushing the
traction drive belt onto the engine pulley. Make sure the
belt seats properly in the grooves of the transmission
and engine pulleys.
IMPORTANT: BELT FINGERS MUST BE SET as
shown in Figure 9. Improper adjustment may cause
impeller to rotate while attachment clutch is
disengaged.
8. Replace attachment drive belt (See “Traction Drive
Belt Replacement” on page 16).
9. Check traction drive clutch adjustment. See “Traction Drive Clutch Adjustment” on page 19.
6. Adjust clutch per instructions under “Attachment
Clutch/Brake Adjustment” on page 18.
7. Replace belt cover and secure with cap screws.
1/8–3/16 in.
(3.2–4.8 mm)
4. Remove traction drive belt from the unit and discard.
5. Place new traction drive belt on engine pulley
between the engine and pulley groove as shown in
Figure 10.
6. Place new traction drive belt on transmission pulley
7. Push the new traction drive belt onto the grooves in
the engine pulley.
Position the traction drive
belt on the engine
sheave like this when
removing and installing it.
2
1
1
1/8–3/16 in.
(3.2–4.8 mm)
2
OS7415
1. Belt Finger
2. Belt
Figure 9
4.9 TRACTION DRIVE BELT
REPLACEMENT
NOTE: Housing and frame must be tipped apart and
attachment drive belt removed from engine sheave in
order to change traction drive belt (Figure 7).
OS7420
Figure 10
CAUTION: Always support Sno-Thro frame
and blower housing when loosening the cap
screws holding them together. Never loosen
cap screws while unit is in service position.
1. Shut off engine, remove key, disconnect spark plug
wire and allow unit to cool completely.
2. Remove attachment drive belt (See “Remove
Attachment Drive Belt” on page 15).
3. Push the traction drive belt off the engine pulley
toward the engine as shown in Figure 10.
4 - 16
4.10 SHEAR BOLTS
Shear Bolt Replacement
IMPORTANT: Use only Ariens shear bolts for
replacement. Use of any other type of shear bolt may
result in severe damage to unit.
1. Align shear bolt holes in auger with shear bolt
holes in shaft.
2. Drive shear bolt through hole. (If shear bolt was
broken, this will drive remaining part from shaft.)
3. Secure shear bolt with nut.
Occasionally a foreign object entering the blower
housing may jam the auger and break the shear bolts
(Figure 11) that secure the auger to the shaft. Breaking
the shear bolts prevents damage to the gear drive by
allowing the auger to turn freely on the shaft.
2
1
NOTE: DO NOT overtighten the shear bolt. Tighten
shear bolt to 5.8 – 12.2 lbf-ft (7.9 – 16.5 N•m).
4.11 TIRE PRESSURE
Keep tires inflated to pressure listed on the tire
sidewall.
2
1. Auger
2. Shear Bolts
OS7370
Figure 11
SECTION 5 - SERVICE AND ADJUSTMENTS
5.1 DISCHARGE CHUTE DEFLECTOR
5.2 DISCHARGE CHUTE
The deflector must stay in selected position while
throwing snow.
If chute does not stay in position while operating,
tighten nut on carriage bolt at pivot point to increase
tension on spring (Figure 13).
To adjust, loosen then retighten hardware to desired
deflector drag force (Figure 12).
Adjusting
Hardware
Discharge
Chute Deflector
2
OS1113
Figure 12
1
OS7375
1. Carriage Bolt
2. Spring
Figure 13
5 - 17
5.3 RUNNERS
Attachment Clutch Lever
Runners should be adjusted as conditions require
(Figure 14).
1. Position unit on a hard, flat, smooth level surface.
5-5/8 - 6-1/4 in.
(14,3 cm - 15,9 cm)
2. Adjust runners by inserting a spacer of desired
thickness under center of scraper blade, loosen
runner hardware, slide runners to flat surface.
Allow 1/8 in. (3 mm) between scraper blade and
hard smooth surfaces. Allow 1-1/4 in. (30 mm)
between scraper blade and uneven or gravel
surfaces. Retighten hardware.
OS0458
NOTE: Keep housing level by adjusting runners
equally.
Figure 15
CAUTION: The attachment clutch cable must
be slightly slack when the clutch lever is
disengaged. The attachment brake will not
function properly if the cable is too taut.
2. Loosen jam nut on attachment clutch cable
adjustment barrel (Figure 16).
2
Turn adjustment barrel up the cable to decrease
the distance between clutch lever and handlebar.
1
OS0482
1. Runner
2. Runner Hardware
Turn the adjustment barrel down the cable to
increase the distance between clutch lever and
handlebar.
Figure 14
5.4 ATTACHMENT CLUTCH/BRAKE
ADJUSTMENT
1
WARNING: IMPROPER ADJUSTMENT
could result in unexpected movement of
auger and impeller, causing death or serious
injury. AUGER / IMPELLER MUST STOP
within 3 seconds when Attachment Clutch/
Impeller Brake Lever is released.
3
2
WARNING: Adjustment procedure requires
running engine with the belt cover off. AVOID
INJURY. Read and understand the entire
Safety section before proceeding.
1. Check attachment clutch lever measurement:
a. Start engine and run at full throttle.
OS7385
b. Slowly squeeze the attachment clutch lever
until auger shaft begins to rotate.
c. Measure the distance from the end of clutch
lever to the handlebar as shown in Figure 15.
The distance between the end of the clutch
lever and the handlebar should be 5-5/8 - 6-1/4
in. (14.3 - 15.9 cm).
d. Shut off engine.
e. If clutch lever measurement is within specified
range, no adjustment is necessary. If clutch
lever measurement is outside the specified
range, follow steps 2 - 7.
3. Attachment Clutch
Cable
4. Jam Nut
5. Adjustment Barrel
Figure 16
3. Check attachment clutch lever measurement and
tighten the jam nut on the attachment clutch cable
adjustment barrel when the clutch lever
measurement is in range. Proceed to step 6.
5 - 18
If clutch cannot be adjusted to specified range with
the cable adjustment alone, perform steps 4 – 5.
4. Remove two screws securing belt cover to unit and
remove belt cover.
5. Adjust the attachment idler position.
a. Loosen attachment idler nut (Figure 8).
b. To increase distance between clutch lever
and handlebar, move the idler towards the
attachment belt.
c. To decrease the distance between the clutch
lever and handlebar, move the idler away
from the attachment belt.
d. Tighten idler adjustment nut.
e. Check clutch lever measurement.
6. Check Brake
To test traction clutch (Figure 18):
1. Without engine running, push unit forward while
slowly moving the traction drive clutch lever toward
the handlebar.
2. Measure distance between lever and handlebar
when the wheels begin to brake. If distance is not
6-1/8 – 6-3/4 in. (15.5 – 17.1 cm), adjust the
traction clutch.
Traction Clutch Lever
6-1/8 – 6-3/4 in.
(15.5 – 17.1 cm)
When the clutch lever is disengaged, the brake
must contact the attachment belt.
When the clutch lever is engaged, the brake must
be more than 1/16 in. (1.6 mm) away from the
belt and must not contact the frame (Figure 17).
OS2490
Figure 18
To adjust traction clutch (Figure 19):
2
1. Loosen jam nut on traction clutch cable adjustment
barrel.
1
Turn adjustment barrel up the cable to decrease
the distance between clutch lever and handlebar.
1/16 in.
(1,6 mm)
Turn the adjustment barrel down the cable to
increase the distance between clutch lever and
handlebar.
2. Check traction clutch lever distance and repeat
adjustment steps if necessary.
OS7390
1. Drive Brake
2. Brake Shoe and Pad
3. Tighten jam nut on traction cable adjustment
barrel.
Figure 17
7. Repeat steps 5 – 6 until attachment clutch lever
distance and brake contact are correct.
1
IMPORTANT: If attachment clutch/brake cannot be
adjusted within tolerances, see your Dealer for repairs.
3
8. Check belt finger clearance.
With clutch lever engaged, belt fingers should be
positioned as shown in Figure 9. Adjust belt
fingers as necessary.
2
9. Replace belt cover.
10.Check that auger/impeller stops within 3 seconds
after attachment clutch/impeller brake lever is
released.
5.5 TRACTION DRIVE CLUTCH
ADJUSTMENT
IMPORTANT: Operating the unit with the traction drive
clutch improperly adjusted will damage the
transmission. Make sure the clutch is adjusted to the
specifications listed.
5 - 19
1. Traction Clutch
Cable
2. Jam Nut
3. Adjustment Barrel
OS7395
Figure 19
SECTION 6 - HANDLEBARS & CONTROLS
6.1 INSPECT LOWER HANDLEBAR
1. Remove bolts attaching lower handlebar to each
side of frame (2 places, each side) (see Figure 20).
2. Remove handlebar assembly.
6.3 TRACTION DRIVE CLUTCH LEVER
AND CABLE
Clutch Lever
Figure 21
3. Check lower handlebar parts for wear or
replacement
1. Remove jam nut and flat washer from bolt.
2. Remove bushings and torsion spring.
4. Assemble, using reverse procedure.
3. Remove retaining ring and traction cable
4. Remove clutch lever.
1. Upper Handlebars
2. Bolt w/Nut, Spacer
and Washers
3. Lower Handlebars
4. Bolts
5. Frame
1
2
5. Check parts for wear or replacement.
6. Assemble, using reverse procedure. Attach cable
to bolt during assembly.
7. Adjust clutch lever position if necessary (see
“Traction Drive Clutch Adjustment” on page 19).
Traction Drive
Figure 21
5
1. Remove clutch lever from upper handlebar (See
preceding Clutch Lever for procedure.)
2. Slide cable off bolt.
3
3. Disconnect cable spring from control under frame.
4. Check cable for wear. Replace if necessary
5. Assemble, using reverse procedure.
4
NOTE: BE sure to route cable over small pulley
mounted to frame
PS0350-1
Figure 20
6. Adjust clutch lever position if necessary (see
“Traction Drive Clutch Adjustment” on page 19).
6.2 REPLACE LOWER HANDLEBAR
Figure 20
1. Remove locking nuts, lock washers, washers, and
spacers from bolt attaching upper handlebars to
lower handlebars (2 places, each side).
2. Lay upper handlebars and control panel on bench
or ground.
NOTE: Removing control cables is not necessary to
replace lower handlebars.
3. Remove bolts attaching lower handlebar to each
side of frame (2 places, each side).
4. Remove lower handlebar.
5. Install new lower handlebar using reverse
procedure.
6. Attach upper handlebars to lower handlebars.
6 - 20
11
10
9
12
8
3
4
2
6
2
2
4
7
2
1
7
5
7
13
8
7
14
1. Bolt (2-1/2")
2. Flange Bushing
3. Clutch Lever (Right Hand)
4. Jam Nut
5. Flat Washer
6. Sleeve Bushing
7. Bushing
8. Torsion Spring
9. Retaining Ring
10. Traction Cable
11. Clutch Lever (left Hand)
12. Bolt (3-1/4")
13. Attachment Cable
15
16
17
14
14. Spring
15. Pulley
16. Bolt w/nut
17. Lower Handle
PS0350-2
Figure 21
6.4 ATTACHMENT CONTROL LEVER AND
CABLE
Attachment Lever
Figure 21
1. Remove jam nut and flat washer from bolt.
2. Remove bushings and torsion spring.
3. Remove retaining ring and traction cable
4. Remove clutch lever.
5. Assemble, using reverse procedure. Attach cable
to bolt during assembly.
Attachment Cable
Figure 21
1. Remove clutch lever from upper handlebars (See
preceding Attachment Lever for procedure.)
2. Slide cable off bolt.
3. Disconnect cable spring from control under frame.
4. Check parts for wear or replacement.
5. Assemble, using reverse procedure.
6. Adjust clutch lever position if necessary
(see“Attachment Clutch/Brake Adjustment” on
page 18).
6. Adjust clutch lever position if necessary (see
“Attachment Clutch/Brake Adjustment” on
page 18).
6 - 21
SECTION 7 - ENGINE
7.1 ENGINE TROUBLESHOOTING
The following troubleshooting chart is to be used to
isolate engine problems and give possible causes and
corrective action responses.
The troubleshooting key is generic and can be used for
several types of engines. Use only those possible
causes and corrective actions that apply to the unit.
ENGINE TROUBLESHOOTING
PROBLEM
Black Exhaust
Blue/White Exhaust
Difficult Starting
Erratic Running
PROBABLE CAUSE
CORRECTION
Restriction in air cleaner
Remove obstruction
Poor compression
Repair per instructions in manufacturer’s manual
Incorrect grade of fuel
Use fuel recommended in manufacturer’s manual
Leaking cylinder head gasket
Replace per instructions in manufacturer’s manual
Sticking valves
Repair per instructions in manufacturer’s manual
Worn cylinder bores
Repair per instructions in manufacturer’s manual
Pitted valves and seats
Repair per instructions in manufacturer’s manual
Broken, worn, or sticking piston rings
Repair per instructions in manufacturer’s manual
Incorrect grade of lubricating oil
Use oil recommended in manufacturer’s manual
Poor compression
Repair per instructions in manufacturer’s manual
Leaking cylinder head gasket
Replace per instructions in manufacturer’s manual
Worn cylinder bores
Repair per instructions in manufacturer’s manual
Worn valve stem guides
Repair per instructions in manufacturer’s manual
Broken, worn, or sticking piston rings
Repair per instructions in manufacturer’s manual
Restriction in air cleaner
Remove obstruction
Low cranking speed
Check connections to electric start (if applicable)
Controls not in correct operating position
Reset controls
Blocked fuel feed line
Remove obstruction
Choked fuel filter
Clean or replace filter
Poor compression
Repair per instructions in manufacturer’s manual
Blocked fuel tank vent
Remove obstruction
Incorrect grade of fuel
Use fuel recommended in manufacturer’s manual
Sticking valves
Repair per instructions in manufacturer’s manual
Worn cylinder bores
Repair per instructions in manufacturer’s manual
Pitted valve stems and seats
Repair per instructions in manufacturer’s manual
Broken, worn, or sticking piston rings
Repair per instructions in manufacturer’s manual
Restriction in air cleaner
Remove obstruction
Controls not in correct operating position
Reset controls
Blocked fuel feed line
Remove obstruction
Choked fuel filter
Clean or replace filter
Poor compression
Repair per instructions in manufacturer’s manual
Blocked fuel tank vent
Remove obstruction
Sticking throttle/restricted movement
Lubricate or replace
Overheating
Allow to cool; determine cause
Sticking valves
Repair per instructions in manufacturer’s manual
Broken, worn, or sticking piston rings
Repair per instructions in manufacturer’s manual
Broken valve spring
Repair per instructions in manufacturer’s manual
Bad spark plugs
Install new spark plugs
7 - 22
ENGINE TROUBLESHOOTING
PROBLEM
Excessive Fuel
Consumption
High Oil Pressure
Knocking
Loss of Power or System
Low Cranking Power
Low Oil Pressure
Misfiring
Overheating
PROBABLE CAUSE
CORRECTION
Restriction in air cleaner
Remove obstruction
Poor compression
Repair per instructions in manufacturer’s manual
Incorrect grade of fuel
Use fuel recommended in manufacturer’s manual
Sticking throttle/restricted movement
Lubricate or replace
Leaking cylinder head gasket
Repair per instructions in manufacturer’s manual
Worn oil pump
Repair per instructions in manufacturer’s manual
Worn cylinder bores
Repair per instructions in manufacturer’s manual
Pitted valve stems and seats
Repair per instructions in manufacturer’s manual
Broken, worn, or sticking piston rings
Repair per instructions in manufacturer’s manual
Incorrect grade of lubricating oil
Use oil recommended in manufacturer’s manual
Pressure relief valve sticking closed
Repair or replace spring
Incorrect grade of fuel
Use fuel recommended in manufacturer’s manual
Overheating
Allow to cool; determine cause
Sticking valves
Repair per instructions in manufacturer’s manual
Worn cylinder bores
Repair per instructions in manufacturer’s manual
Broken, worn, or sticking piston rings
Repair per instructions in manufacturer’s manual
Worn or damaged bearings
Repair per instructions in manufacturer’s manual
Incorrect piston height
Adjust per instructions in manufacturer’s manual
Broken valve spring
Replace per instructions in manufacturer’s manual
Restriction in air cleaner
Remove obstruction
Blocked fuel feed line
Remove obstruction
Choked fuel filter
Remove obstruction
Poor compression
Repair per instructions in manufacturer’s manual
Blocked fuel tank vent
Remove obstruction
Incorrect grade of fuel
Use fuel recommended in manufacturer’s manual
Sticking throttle/restricted movement
Lubricate or replace
Leaking cylinder head gasket
Replace per instructions in manufacturer’s manual
Overheating
Allow to cool; determine cause
Worn cylinder bores
Repair per instructions in manufacturer’s manual
Pitted valve stems and seats
Repair per instructions in manufacturer’s manual
Broken, worn, or sticking piston rings
Repair per instructions in manufacturer’s manual
Bad electrical connection
Check connections to electric start (if applicable)
Faulty starter motor (if applicable)
Replace per instructions in manufacturer’s manual
Incorrect grade of lubricating oil
Use oil recommended in manufacturer’s manual
Incorrect grade of lubricating oil
Use oil recommended in manufacturer’s manual
Worn or damaged bearings
Replace per instructions in manufacturer’s manual
Insufficient oil in sump
Refill with oil
Oil pump worn
Replace per instructions in manufacturer’s manual
Choked fuel filter
Remove obstruction
Poor compression
Repair per instructions in manufacturer’s manual
Leaking cylinder head gasket
Replace per instructions in manufacturer’s manual
Overheating
Allow to cool; determine cause
Incorrect tappet adjustment
Adjust per instructions in manufacturer’s manual
Sticking valves
Repair per instructions in manufacturer’s manual
Pitted valves and seats
Repair per instructions in manufacturer’s manual
Restriction in air cleaner
Remove obstruction
Incorrect valve timing
Adjust per instructions in manufacturer’s manual
Leaking cylinder head gasket
Replace per instructions in manufacturer’s manual
7 - 23
ENGINE TROUBLESHOOTING
PROBLEM
Poor Compression
PROBABLE CAUSE
CORRECTION
Leaking cylinder head gasket
Replace per instructions in manufacturer’s manual
Incorrect tappet adjustment
Adjust per instructions in manufacturer’s manual
Sticking valves
Repair per instructions in manufacturer’s manual
Worn cylinder bores
Repair per instructions in manufacturer’s manual
Pitted valves and seats
Repair per instructions in manufacturer’s manual
Broken, worn, or sticking piston ring(s)
Repair per instructions in manufacturer’s manual
Worn valve stems and guides
Repair per instructions in manufacturer’s manual
Broken valve spring
Replace per instructions in manufacturer’s manual
Restriction in air cleaner
Remove obstruction
Fuel tank empty
Fill tank
Choked fuel filter
Remove obstruction
Bad spark plugs
Replace spark plugs; see manufacturer’s manual
for recommendations
Poor compression
Repair per instructions in manufacturer’s manual
Sticking throttle/restricted movement
Lubricate or replace
Leaking cylinder head gasket
Replace per instructions in manufacturer’s manual
Overheating
Allow to cool; determine cause
Sticking valves
Repair per instructions in manufacturer’s manual
Broken, worn, or sticking piston rings
Repair per instructions in manufacturer’s manual
Incorrectly aligned flywheel and/or
flywheel housing
Adjust per instructions in manufacturer’s manual
Will Not Crank
Bad electrical connection
Check connections to electric start (if applicable)
Will Not Start
Restriction in air cleaner
Remove obstruction
Choked fuel filter
Remove obstruction
Bad spark plugs
Replace spark plugs; see manufacturer’s manual
for recommendations
Starts and Stops
Vibration
7 - 24
7.2 ENGINE REMOVAL
10.Remove the four mounting bolts from the engine
base.
Figure 22
11.Lift engine from mounting base and set to side.
CAUTION: Remove fuel from fuel tank before
removing engine.
7.3 ENGINE INSTALLATION
Figure 22
1. Drain gasoline.
1. Block frame so it will not tip.
2. Separate blower housing from frame (see Figure
7).
2. Position engine in frame.
3. Block frame front and back so it will not tip.
4. If equipped with electric start, install the starter.
4. Remove belt cover.
5. Re-attach any brackets for chute/deflector controls.
5. Remove attachment belt and drive belt from the
engine pulleys. For instructions, see "Attachment
Drive Belt Replacement" on page 15 and "Traction
Drive Belt Replacement" on page 16.
6. Install pulleys on engine shaft.
3. Insert mounting bolts and tighten.
7. Install belts. For instructions, see "Attachment
Drive Belt Replacement" on page 15 and "Traction
Drive Belt Replacement" on page 16.
6. Remove bolt, lock washer, and flat washer
securing pulleys to engine shaft.
8. Adjust engine pulleys to align with attachment and
drive pulleys.
7. Loosen and slide pulleys off engine shaft.
9. Tighten pulleys
8. If the unit has a bracket at the top of the engine for
chute/deflector controls, unbolt it.
10.Install belt cover.
11.Connect blower housing to frame.
9. If the unit is equipped with electric starting, remove
the starter.
2
3
4
5
6
7
8
5
1
1. Frame
2. Engine
3. Engine Shaft
4. Belt Cover
5. Belt Finger
6. Drive Pulley
7. Drive Belt
8. Attachment Pulley
9. Attachment Belt
10. Flat Washer
11. Locking Washer
12. Bolt
13. Engine Mounting Bolt
(typical of 4)
9
10
11 12
13
Figure 22
7 - 25
PS0330-1
)S7350
SECTION 8 - TRANSMISSION
The transmission has no dealer-serviceable parts. If
defective, it must be replaced as a unit.
8.2 TRANSMISSION INSTALLATION
8.1 TRANSMISSION REMOVAL
IMPORTANT: Before beginning installation, make sure
that:
Figure 23
Figure 23
• Key is removed from switch.
1. Shut off engine, remove key, disconnect spark plug
wire, and allow unit to cool completely.
• Spark plug is disconnected.
• Machine is cool.
CAUTION: Remove fuel from fuel tank before
placing unit in service position.
• Gasoline has been drained from tank.
1. If necessary, place machine on a level surface, and
tip up into service position (see Figure 4 on page
12).
2. Drain gasoline.
3. Place machine on a level surface, and tip up into
service position (see Figure 4 on page 12).
2. Bolt transmission to frame.
3. Attach drive belt to transmission pulley.
4. Remove both wheels.
IMPORTANT: Make sure drive belt is properly aligned
with transmission pulley and engine pulley.
5. Remove nut and bolt holding axle gear in place.
6. Remove axle bushings. Discard if worn.
4. Install axle gear on axle. Do not tighten nut onto
bolt.
7. Remove axle
8. Remove drive belt from transmission pulley
5. If necessary, install new axle bushings.
9. Remove bolts securing transmission to frame
6. Install axle.
10.Remove transmission.
7. Align axle gear with transmission sprocket as
required.
8. Tighten nut onto bolt holding gear to axle.
9. Install wheels.
2
1
12
13
3
4
11
10
9
5
8
6
PS0330_2
7
Figure 23
8 - 26
1. Frame
2. Locking Nut (typical of 3)
3. V-Belt (stretch fit)
4. Transmission Pulley
5. Axle Shaft
6. Bolt and Nut
7. Gear
8. Transmission Mounting Bolt
and Flat Washer (typical of 3)
9. Transmission
10. Wheel
11. Bolt and Nut
12. Flat Washer
13. Axle Bushing (1 each side)
SECTION 9 - AUGER/IMPELLER
4
2
3
1. Auger Drive Pulley
2. Bolt
3. Locking Washer
4. Auger Drive Shaft
5. Blower Housing
6. Tapping Screw (3 each side)
7. Flange Bushing
8. Shaft Bushing
9. Auger
10. Shear Bolt
1
5
6
7
8
9
6
PS0361-1
7
8
10
Figure 24
9.2 SHEAR BOLTS
WARNING: Stop engine, remove key, wait for
moving parts to stop and remove wire from
spark plug before leaving operator’s position
and attempting to maintain or inspect auger.
IMPORTANT: Use only Ariens shear bolts for
replacement. Use of any other type of shear bolt may
result in severe damage to unit.
Occasionally an object may enter auger/impeller
housing and jam auger, breaking shear bolts which
secures auger to shaft. This prevents damage to gear
drive by allowing auger to turn freely on shaft.
9.1 AUGER/IMPELLER REPAIR
1. Place machine on a flat, level surface.
NOTE: Placing blocking under the runners on the
blower housing may make auger removal easier.
To replace shear bolt:
1. Slide auger outward and align hole in shaft with
hole in auger (Figure 24). The holes in shaft for roll
pins and shear bolts will line up.
2. Remove bolt holding auger drive pulley to shaft
and remove pulley.
3. Remove three tapping screws holding shaft
bushing to blower housing and remove flange on
each side.
2. Drive the new shear bolt through hole (if shear bolt
was broken this will drive remaining part from
shaft).
4. Grasp auger assembly and pull gear case and
auger/impeller assembly free of housing.
3. Secure with nut.
5. Remove shear bolts and remove auger from shaft.
6. Check all parts for wear or replacement.
7. Assemble, using reverse procedure.
9 - 27
9.3 DISCHARGE CHUTE
Models 939001 and 939002.
2
Figure 25
WARNING: DO NOT put hands or feet near
or under rotating parts. Keep clear of
discharge opening at all times.
4
3
WARNING: NEVER direct discharge of
material toward bystanders nor allow anyone
in front of equipment while unit is in operation.
Be familiar with area of operation.
1
14
1. Remove bolts holding chute pedestal to blower
housing.
13
15
2. Lift chute and pedestal from housing.
12
3. Check parts for wear, and replace as needed.
12
4. Assemble in reverse order.
7
11
10
9
8
6
1
5
Ps0373-1
1. Discharge Chute
2. Handle
3. Bolt
4. Nut and Washers
5. Blower Housing
6. Bolt with Washer
7. Pedestal
8. Locking Nut
9. Flat Washer
10. Spring
11. Friction Plate
12. Friction Washer
13. Flat Washer
14. Bolt
15. Direction Handle
Figure 25
9 - 28
9.4 DISCHARGE CHUTE CRANK
1. Remove the cover over the chute gear.
Model 939300 only or if kit 73900100, Crank Kit, is
installed.
2. Remove the spring clip from the pinion gear, and
slide the gear, thrust washer, and bushing off the
crank shaft.
Figure 26
3. Slide the crank shaft back through the pinion gear
bracket and bracket on the pedestal weldment.
WARNING: DO NOT put hands or feet near
or under rotating parts. Keep clear of
discharge opening at all times.
4. Remove bolts holding chute pedestal to blower
housing.
5. Lift chute and pedestal from housing.
WARNING: NEVER direct discharge of
material toward bystanders nor allow anyone
in front of equipment while unit is in operation.
Be familiar with area of operation.
NOTE: The chute gear is attached to the chute and is
removed with the chute and pedestal.
6. Check parts for wear, and replace as needed.
7. Assemble in reverse order.
PS0373-2
1
3
2
4
5
6
7
9
8
1. Crank Shaft
2. Bushing
3. Self-Tapping Screw
4. Gear Cover
5. Pinion Gear Bracket
6. Bushing
7. Pinion Gear w/Spring Clip
8. Chute Gear
9. Discharge Chute
10. Blower Housing
11. See Figure 25
12. Bolt w/Lock Washer
13. Pedestal
13
11
12
10
Figure 26
9 - 29
9.5 RUNNER AND SCRAPER
CAUTION: Adjust auger/impeller housing
height to clear gravel or crushed rock
surfaces.
Runners should be adjusted as conditions require
(Figure 27). Raising or lowering runners controls
distance scraper blade is held above surface being
cleared.
When operating machine on gravel surface, lower
runners so the housing will not pick up gravel. On
concrete, blacktopped or packed down snow surfaces,
raise runners so that scraper blade scrapes clean.
Position unit on a flat level surface. Adjust runners by
inserting a spacer of desired thickness under center of
scraper blade, loosen hardware, slide runners to flat
surface and retighten hardware.
NOTE: Above method keeps housing level by adjusting runners equally. Uneven runners make machine
difficult to steer and results in uneven clearing.
1
2
3
4
7
5
6
PS0361_2
1. Runner
2. Flat Washer
3. Locking Nut
4. Bolt
5. Scraper
6. Locking Nut
7. Flat washer
Figure 27
9 - 30
SECTION 10 - GEAR CASE
10.1 ALUMINUM GEAR CASE
1
2
8
9
10
3
4
6
5
14
11
13
12
7
16 15
17
20 19 18
29
21
23
22
25
24
26
30
27
PS0381
1. Bolt w/Lock Washer
2. Pulley
3. Bearing Flange
4. Ball Bearing
5. Bearing Flange
6. Impeller (12 in.)
7. Groove Pin
8. Oil Seal
9. Flange Bushing
10. Thrust Collar
11. Shaft and Worm Gear
12. Flat Washer
13. Oil Seal
14. Gear Case (Left Hand)
15. Flange Bushing
16. Flat Washer
17. Sleeve Bushing
18. Gear
19. Flat Washer
20. Flange Bushing
28
21. Gear Case (Right Hand)
22. Oil Seal
23. Tapping Screw (typical of 6)
24. Flat Washer
25. Flange Bushing
26. Woodruff Key
27. Auger Shaft
28. Gear Case Assembly
29. Loctite Gasket 518
30. L2 Lube (16 oz)
Figure 28
1. Remove auger/impeller and gear case from
housing (see Auger/Impeller Repair on page 27).
NOTE: A woodruff key holds the worm gear on rake
shaft.
2. Remove six tapping screws that hold right and left
gear case halves together (Figure 28).
5. Slide bronze bushing off front of worm gear shaft.
Replace if necessary. A flat on the bushing flange
positions the bearing inside the gear case.
3. If flange bushings need replacement:
a. Remove oil seals from outside of gear case
halves with a screwdriver.
6. Replace the seal behind the rear bronze bushing. It
fits into a groove in gear case.
b. Very lightly, press flange bushings from
outside in with a bearing driver. Make sure the
flat on the flange of bushing fits in the inside
notch of the case.
7. Replace the rear bushing if necessary. It is a larger
diameter than one in front, but it is identical in
design.
c. Replace oil seals.
4. Check all internal parts for wear, and replace if
necessary.
8. If thrust collar needs replacing, drive out groove pin
in direction of least resistance.
9. Inspect worm gear shaft for burrs or black
coloration. If either show up, replace shaft.
10 - 31
Service Parts List
10.Before re-assembling gear case:
a. Clean mating surfaces of gear case.
Order the following parts through your Dealer:
b. Apply Loctite gasket to cleaned surface.
c. Allow to cure for 24 hours.
Part No.
Description
d. Make sure the flats on the bushings are in their
proper places.
00036800
Ariens Hi-Temp Grease (3, 3 oz.
cartridges)
21533400
Spark Plug (939001, 002)
21533500
Spark Plug (939300)
07200108
Impeller Belt
07200109
Stretch Fit Traction Belt
53200500
Shear Bolts
11.Reassemble gear case.
After assembly is complete you should be able to
turn input shaft freely.
12.Fill gear case with lubricating oil (Ariens L-2, P/N
00008000):
a. Remove filler plug.
b. Fill gear case with oil.
c. With machine sitting level, check oil level.
Lubricating oil should be even with filler plug
hole.
NOTE: Inserting a wire into the hole may be necessary
to check level. Over-lubricating will not damage the
gear case.
10 - 32
Ariens Company
655 West Ryan Street
P.O. Box 157
Brillion, WI 54110-0157
920-756-2141
Fax 920-756-2407
www.ariens.com
1 - 33
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