Toro 521 Snowthrower, 3521 Snowthrower User manual

Toro 521 Snowthrower, 3521 Snowthrower User manual
 FORM NO. 3320-519
MODEL NO. 380350 — 9900001 8: UP
MODEL NO. 38052C — 9900001 & UP
OPERATOR'S
MANUAL
3921 & 521 SNOWTHROWER
ÁN SAFETY INSTRUCTIONS
The 3521 and 521 SNOWTHROWERS meet or exceed the Outdoor Power Equipment
Institute s safety standards for snowthrowers; thus, Toro proudly displays the OPEI safety
product, it is essential that you or”
understand the contents of this
attention to the safety symboË
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adopted by ANSI —
Standards Institute. [The snowthrower ls
designed and tested tq offer nr er ee
service; however, failure of
accordance with the fo ore to Pi
tions MAY RESULT IN own IS Gt
BEFORE OPERATING
1. Read and understand the contents of this
manual before starting and operating the
machine. Become familiar with all controls
and know how to stop the engine quickly.
2. Keep everyone, especially children and
pets, away from the area of operation. Never
allow children to operate the snowthrower.
3. Inspect area thoroughly where snow-
thrower will be used. Remove door mats,
sleds, boards, sticks, wire and any other
foreign objects which might be picked up and
thrown by the snowthrower.
4. Keep all shields and safety devices in place.
If ashield, safety device or decal is defective or
damaged, repair or replace it before operation
is commenced. Also, tighten any loose nuts,
bolts and screws.
5. Wear adequate winter clothing and foot-
wear that will improve footing on slippery
surfaces. Do not wear loose fitting clothing
that could possibly get caught in moving parts.
6. Adjust both skids so auger housing clears
gravel or crushed rock surfaces.
7. Before starting the engine, assure auger
drive control and wheel drive control are in
disengaged position.
seal. To assure pe safety, optimum performance, and to gain knowledge of the
TRA the EX De ever started. Pay particlilar
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starting
> Since
it care-
fully. DO NOT SMOKE
A. Use an approved gasoline container.
” Publ | and only when
| | e: must be cool
to preventa Dotential tite azard.
C. Uper goors—rengme—ws-be ch in the
garage because exhaust fumes are
dangerous and could possibly be deadly.
Do not run engine indoors.
D. Wipe up any gasoline that spilled, and
install gasoline container cap and snow-
thrower fuel tank cap securely before
starting the engine.
WHILE OPERATING
9. Keep people and pets a safe distance away
from the snowthrower and area of operation.
10. Allow engine and machine to warm up
for about 2 minutes to adjust to outdoor
temperature before clearing snow.
11. Do not run engine indoors, except when
starting engine. When starting engine indoors,
open outside doors because exhaust gasses
are dangerous.
12. Operate the snowthrower only when there
Is good visibility or light. Always maintain
secure footing and keep a firm grip on the
handles, especially when operating in reverse,
13. Be attentive when using the snowthrower,
and stay alert for holes inthe terrain and other
hidden hazards. Be careful when clearing
snow from a gravel drive because stones could
©The Toro Company — 1988
SAFETY INSTRUCTIONS
be picked up and thrown if the skids are not
adjusted so auger.housing clears all rocks.
14. STAY BEHIND THE HANDLES AND
AWAY FROM DISCHARGE OPENING WHILE
OPERATING THE SNOWTHROWER. Keep
face, hands, feet and any other part of your
body or clothing away from concealed,
moving or rotating parts.
15. Do not make any adjustments while the
engine 1s running, with the exception of
carburetor adjustments.
16. Never operate snowthrower near by-
standers, glass enclosures, automobiles and
trucks, window wells or a drop-off without
proper adjustment of the snow discharge
angle.
17. Clear snow from slopes by going up and
down; never across the face, and use caution
when changing directions. Never clear snow
from steep slopes.
i
18. Do not overload the snowthrgwer by
clearing snow at too fast a rate. = q
19. If a solid object is hit or snowthrower
vibrates abnormally, shut engine off and wait
for all movement to stop. Pull high.tengiori wire, |
off spark plug and check ‘showthtawet Int !
mediately for possible damade, “añ ob-
struction or loose parts. Vibration is generally...
a warning of trouble. Repair any damage
before restarting engine and operating snow-
thrower again.
20. Do not touch engine while it is running or
soon after itis stopped because the engine will
be hot enough to cause a burn. Do not add oil
or check oil level in crankcase when engine is
running.
21. Before leaving the operator's position —
behind handles — assure traction and auger
drive controls are in DISENGAGE position
and rotate ignition key to OFF. Remove key
from switch if snowthrower will be left
unattended
22. Before adjusting, cleaning, repairing and
inspecting the snowthrower, and before un-
clogging the discharge chute, shut engine off
and wait for all moving parts to stop. Also, pull
high tension wire off spark plug and keep wire
away from the plug to prevent accidental
starting. Use a stick to remove obstructions.
23. Release auger drive control to assure it is
disengaged before transporting or storing the
snowthrower. Never operate snowthrower at
high transport speeds on slippery surfaces.
Use care when backing.
24. Let engine run for a few minutes after
clearing snow and before storing so moving
parts do not freeze.
MAINTAINING SNOWTHROWER
25, Perform only those maintenance instruc-
tions described in this manual. Shut engine off
before performing any maintenance service or
adjustment. Additionally, pull high tension
wire off spark plug and keep wire away from
plug to prevent possibility of accidental
starting. If major repairs are ever needed,
contact the local Authorized TORO Service
Dealer for assistance.
26. Keep snowthrower in safe operating
condition by keeping‘nuts, bolts and screws
tight. Check engine mounting bolts frequently
to assure they are tight.
27. Do not overspeed the engine by changing
governor settings. Recommended maximum
engine speed is 3400 rpm. To assure safety
and accuracy, check maximum engine speed
(3400, rpm) with a tachometer.
и à
28. Alla engine to cool before storing snow-
thrower in an enclosufe such as a garage or
-storage shed. Never store the machine with
fuel in the fuel tank inside a building where
open flame or sparks are present.
29. When storing the snowthrower for an ex-
tended time — off season storage or 30 days
— drain gasoline from fuel tank to
prevent a potential hazard. Store gasoline in a
safety-approved, red, metal container. Re-
move key from ignition switch and keep itin a
memorable place.
30. At the time of manufacture, the snow-
thrower conformed with or exceeded safety
standards in effect for snowthrowers, There-
fore, to assure optimum performance and
safety, purchase genuine TORO replacement
parts and accessories to keep the TORO all
TORO. NEVER USE "WILL-FIT" REPLACE-
MENT PARTS AND ACCESSORIES. The
TORO logo assures genuineness,
31. For safety reasons, use only those acces-
sories and attachments recommended by The
Toro Company to assure continued safety
certification of the product. Using unapproved
accessories and attachments could contribute
to a potential hazard.
TABLE OF CONTENTS
Symbol Glossary == == a 3
LEER PAS runa CRE NS NAAA 4
Setting Up Instructions ................. 5-7
Installing Handle: 2. ea vamos 5
Install Traction Rod ....... iii. 5
Install Auger Drive Control Linkage ..... 5
Install Speed Selector Rod ............. 6
Connect Ignition Wires... .............. 6
Install Chute Control=.==a 10 E
Preparation Before Starting ............. . 8
ENL-Orankease WA ll. ue 8
Fill Fuel Tank With Gasoline............ 8
Check Snowthrower Operation ......... 8
COMtraló unc E Pa A 9
Starting and Stopping Instructions....... 10
ТО art EDGING, Ea As 10
Te Sign ENCINÉ ...= wwe 10
Operating Instructions ............... 10-11
Page
Snowthrówer TIDS ovis evn van wis 3s 10
Maintenance ........._eeeexeceneeras . 11-17
Draining Gasoline ¿scream 11
Lubricating Snowthrower ............. 11
Changing Crankcase Oil .............. 12
Auger Gear BOX 110000000400 нужно 12
Adjusting Skids and Scraper Blade .... 12
Adjusting Auger Control If Unit
Will Not Throw Snow .............. . 13
Replacing Auger/Impeller Drive Belt ... 13
Replacing Traction Drive Belt ......... 14
Adjusting Traction Disc ............... 14
Adjusting Speed Selector ............. 15
Baplacing Spark Bg ccs vnmmmmmmmm wes 16
Adjusting Carburetor ................. 16
Preparing Snowthrower For Storage ... 17
Identification and Ordering............. . 19
The Tora Promise suas ves Aaa 20
SYMBOL GLOSSARY
A ®
Safety alert Keep hands away
XL
Shut off engine before
unclogging discharge chute auger, keep hands, feet and
A
A)
ь
“ay
Avoid injury from rotating
clothing away.
Primer pump
Read and understand
operator's manual
ANN O
| Ta]
Hot Surface
Engine speed
(Throttle)
- v
“| }
Choke Choke
on Off
LOOSE PARTS
Part Qty. Use
Ei re ME Install on Speed Selector Rod
Capscrews á Pyramidal Washers 4 Install Handle
Clevis Pin 1
Cotter Pin 1 Install Auger & Traction Drive Control Rod
Flange Nut 2
Capscrew & Locknut 1
Locknut & Pyramidal Washer 1 | Install Chute Control Rod
Special Hex Flange Screw 1 Connect Wires
Carriage Bolt 1
Rubber Washer 1
Te Secure Chute Deflector
Belleville Washer 1
Locknut 1
Keys 2 Use in ignition switch
Registration Card 2 Used to validate product warranty
Specifications and design subject to change without notice.
Accessories:
110 VAC Electric Starter (part no. 23-3790) Drift Breaker Kit (part no. 37-7020)
Tire Chains (part no. 37-7010) Grader Blade (model no. 59099)
Light Kit (part no. 54-9821)
SETTING UP INSTRUCTIONS
Note: Left and right sides of snowthrower are
determined by standing in the normal operating
position.
INSTALL HANDLE
1. Remove tie straps securing control rods to
handle.
2. Position left handle on side of unit, align
handle mount holes with holes in side plate
and secure with two capscrews and pyramidal
washers until finger tight (Fig. 1). Repeat pro-
cedure on right side. Make sure handles are at
same height (parallel) before tightening handle
screws in both sides of unit.
Figure 1
curved washers
J. Wheel retainer
1. Handle
2. Capscrews and
INSTALL TRACTION ROD
1. Thread a flange nut (Flange side down) onto
traction rod located on left handle (Fig. 2).
Figure 2
1. Flange nut 2. Traction rod
2. Insert traction rod through loop in lower
traction rod (Fig. 3).
Figure 3
1. Traction rod 3. Lower traction rod
2. Loop
3. Thread a flange nut (flange side up) onto
bottom of traction control rod to loop in lower
traction rod (Fig. 3)
4. Move speed selector into first gear,
Figure 4
1. Traction control lever
2. Approximately 4% inches (11.5 cm)
5. Slowly pull machine backward while slowly
depressing traction control lever toward handle.
Adjustment is correct when wheels stop turning
and the distance between the top of the traction
control lever and the center of the handle is 4%
inches {11.5 cm) (Fig. 4).
6. Adjust flange nuts on traction rod (Fig. 3)
until dimension is attained.
INSTALL AUGER
DRIVE CONTROL LINKAGE
1. Loosen jam nut above clevis on upper control
rod (Fig. 5).
SETTING UP INSTRUCTIONS
2. Align holes in clevis and lower control rod,
install with clevis pin (Fig. 5).
Figure 5
Jam nut
Clevis
Upper contro! rod
Lower control rod
Clevis pin
Cotter pin
Blaha
3. Check the distance between the center of
the handle and tip of the auger control lever
(Fig. 6). Distance should be approximately 5
inches (12.7 cm).
Figure 6
1. Auger control lever
2. Approximately 5 inches (12.7 cm)
4. To adjust distance, remove clevis pin,
loosen jam nut and thread clevis up ordown to
increase or decrease distance between handle
and control lever.
6
5. After adjusted, install clevis pin and secure
with cotter pin. Tighten jam nut to secure
clevis (Fig. 5).
6. Compress lever against handle grip to
check lever operation. If lever is difficult to
compress or does not touch handle, shorten
distance between center of handle and tip of
lever; repeat steps 4 and 5.
INSTALL SPEED SELECTOR ROD
1. Pull speed selector arm to the fully “out”
position (Fig. 7) and move control handle on
escutcheon plate to the R (REVERSE) position
to ease assembly.
2. Install speed selector rodinto selector arm,
add one flat washer on the selector rod and
secure with cotter pin (Fig. 7).
UG
|
Figure 7
1. Speed selector arm
2. Speed selector rod
3, Flat washer and cotter pin
Note: If speed selector lever will not move into
third gear, an adjustment is necessary: refer to
Adjusting Speed Selector, page 15.
CONNECT IGNITION WIRES
1. Remove phillips head screw and wire from
engine bracket, install wire with smaller 1.D.
hole and reassemble to engine bracket
(Fig. 8).
2. Insert flange head capscrew through large
|.D. hole in remaining wire and install in lower
hole in engine bracket (Fig. 8).
SETTING UP INSTRUCTIONS
Figure 8
1. Small l.D. wire and phillips head screw
2. Flange head capscrew and large ! D, wire
INSTALL CHUTE CONTROL
1. Assemble chute control bracket and rod to
left side of handle with capscrew and locknut.
Leave locknut loose until assembly is
completely mounted (Fig. 9).
Figure 9
1. Chute control bracket and rod
2. Capscrew and locknut
Figure 10
1. Worm gear and bracket
2. Pyramidal washer and locknut
2. Apply No. 2 general purpose grease to
worm gear. Mount worm gear and bracket to
mounting flange and secure with pyramidal
washer and locknut (Fig. 10).
3. Slide worm gear into teeth of chute retain-
ing ring and tighten locknut (Fig. 10). Then,
tighten locknut to secure chute control bracket
against left handle (Fig. 9).
SECURE CHUTE DEFLECTOR
1. Pivot deflector upward and back until deflector
stop passes over lip on top of chute.
2. Secure left side of deflector to discharge chute
using carriage bolt, rubber washer, friction
plate, flat washer and locknut. Make sure rubber
washer and friction plate are positioned between
chute and deflector and friction plate tabs fit
into holes in deflector. See Figure 11 for proper
installation sequence of parts.
3. Tighten nuts on both sides of deflector. Do not
over tighten nuts so excessive force is required to
operate deflector.
Figure 11
1. Chute
2. Deflector
3. Carriage bolt
4. Rubber washer
5. Friction plate
6. Flat washer
7. Belleville washer
8. Locknut
PREPARATION BEFORE STARTING
FILL CRANKCASE WITH OIL
The engine is shipped from the factory without
oil in the crankcase. Therefore, before trying
to start engine, oil must be added to the
crankcase.
IMPORTANT: Check level of oil every 5
operating hours or each time unit is used.
Initially, change oil after the first 2 hours of
operation; thereafter, under normal condi-
tions, change oil after every 25 hours of
operation. However, change oil more fre-
quently when engine is operated in extremely
dirty conditions.
1. Move unit to a level surface to assure an
accurate oil level reading.
2. Clean area around dipstick to prevent
foreign matter from entering filler hole when
dipstick is removed.
3. Remove dipstick from crankcase (Fig. 12).
неон
Figure 12
Filler hole
Dipstick
Fuel Tank Cap
on
4. Slowly, pour 21 ounces (0.621 |) of SAE
5W30 or SAE 10oilinto the filler hole (Fig. 12).
The engine uses only high-quality detergent
oil having the American Petroleum Institute
— API — “service classification" SC, SD or SE.
8
Note: Dipstick must be fully installed to assure
accurate gauging of oil level. DO NOT
OVERFILL.
FILL FUEL TANK WITH GASOLINE
THE TORO COMPANY STRONGLY REC-
OMMENDS THE USE OF CLEAN, FRESH
UNLEADED REGULAR GASOLINE IN TORO
GASOLINE POWERED PRODUCTS. UN-
LEADED GASOLINE BURNS CLEANER, EX-
TENDS ENGINE LIFE, AND PROMOTES
GOOD STARTING BY REDUCING THE BUILD-
UP OF COMBUSTION CHAMBER DEPOS-
ITS. LEADED GASOLINE CAN BE USED IF
UNLEADED IS NOT AVAILABLE.
NOTE: NEVER USE METHANOL, GASO-
LINE CONTAINING METHANOL, GASOHOL
CONTAINING MORE THAN 10% ETHANOL,
GASOLINE ADDITIVES, PREMIUM GASO-
LINE, OR WHITE GAS BECAUSE ENGINE
FUEL SYSTEM DAMAGE COULD RESULT.
1. Clean area around the fuel tank cap.
Remove cap from fuel tank and fill tank to
within 1/2 inch (13 mm) from the top with
gasoline. Reinstall fuel tank cap (Fig. 12).
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A DANGER
Gasoline is extremely flammable and
explosive under certain conditions. Do
not smoke when handling fuel and keep
fuel far away from open flames and
sparks. Never buy more than a 30 day
supply of gasoline. Store gasoline in an
approved container and keep it out of the
reach of children.
Refuel outdoors, only when engine is
cold. Fill tank to within 1/2" (13 mm)
from its top. This space Is for expansion
of fuel. Use funnel or spout to prevent
spilling. Wipe up any spilled gas.
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CHECK SNOWTHROWER OPERATION
Check snowthrower operation before using it
to blow snow. Familiarize yourself with the
controls and starting and stopping pro-
cedures: referto Controls, page 9 and Starting
and Stopping instructions, page 10. If any
malfunction is noted, review Set-Up Instruc-
tions and check snowthrower again.
CONTROLS
Auger Drive Control (Fig. 13) — Control has
two positions: ENGAGE and DISENGAGE. To
engage auger and impeller, compress lever
against right handle grip. To disengage,
release lever.
Traction Control (Fig. 13) — To achieve
traction, lever must be compressed against left
handle grip. To stop traction, release lever.
Figure 13
Auger drive control
Traction control
Speed selector
Ignition switch
Discharge chute control
Fuel shut-off valve
Chute deflector handle
nn A La ho
Speed Selector (Fig. 13) — The control has
four positions: reverse, 1, 2 and 3. To change
speeds, move gear shift to position desired.
Lever will lock in notch at each speed
selection. Use positions 1, 2, and 3 depending
on snow conditions.
Ignition Switch (Fig. 13) — Switch has two
positions: ON and OFF. Rotate key to ON
before starting engine with the recoil starter.
To stop engine, rotate key to OFF.
Throttle (Fig. 14) — Moving the throttle
upward increases engine speed.
Figure 14
Choke (model 3521)
Choke {model 521)
Primer
Throttle
Recoil starter
A De ТО ==
Choke (Fig. 14) — Choke for engine is located
on heater box. Rotate choke to FULL choke
position to start a cold engine. As engine
warms up, move choke gradually to OFF.
Primer (Fig. 14) — Press primer to pump small
amount of gasoline into engine for improved
cold weather starting.
Fuel Shut-Off Valve (Fig. 13) — Valve is
located under fuel tank. Close valve to stop
fuel flow from fuel tank and open valve to allow
fuel to flow to the carburetor. Close valve when
snowthrower is not used.
Discharge Chute Control (Fig 13) — Rotate
discharge chute control clockwise to move
discharge chute to the left and counterclock-
wise to move chute to the right.
Recoil Starter (Fig. 14) — Recoil starter is on
back side of engine. Pull recoil starter to start
engine,
Chute Deflector Handle (Fig. 13) — Deflector
handle is on top of discharge chute and it is
used to control height of the snow stream.
STARTING AND STOPPING INSTRUCTIONS
TO START ENGINE:
Note: (Model 521 only) If engine is operated
when temperature is +40° F (4° C) or higher,
remove carburetor heater box (Fig. 15).
However, the heater box must be reinstalled
when temperature falls below +40° F (4° C).
To remove heater box:
A. Remove phillips screws and hex head
screw securing heater box in place. Pull
choke knob off choke rod (Fig. 15).
. Lift heater box up and away from the
engine. and reinstall choke knob on
mounting pin.
mo
Figure 15
4. High tensión wire
5. Spark plug
1. Heater box
2. Phillips screws
3 Hex head screw
IMPORTANT: Check auger and impeller to
assure that both parts are not frozen solid, but
free to rotate. Also, make sure discharge chute
is not obstructed.
1. Push high tension wire onto spark plug
(Fig. 15).
2. Move throttle to FAST (Fig. 14).
3. Open fuel shut-off valve below fuel tank
(Fig. 13).
4. Rotate choke to full choke position
(Fig. 14).
5. Rotate ignition key to ON (Fig. 13).
6. Depress primer (Fig. 14) five times.
7. Grasp recoil starter handle (Fig. 14) and
pull it out slowly until positive engagement
results; then pull vigorously to start the
engine. Keep firm grip on starter handle and
return the rope slowly.
Note: If engine does not start or if temperature
Is -10° F (-23° C) or below, additional priming
will usually be required
8. After engine starts, immediately rotate
choke (Fig. 14) to 3/4 position. As engine
warms up, rotate choke to 1/2 position; then to
OFF position. If engine falters, return choke to
1/2 position. When engine warms sufficiently,
rotate choke to OFF position.
BEFORE STOPPING ENGINE
1. Run engine for a few minutes to help dry off
any moisture which may have accumulated on
engine.
2. With engine running, pull recoil starter with a
rapid continuous full arm stroke (3) three or (4)
four times. This will help prevent possible freeze-
up of recoil starter due to extreme snow blowing
conditions.
Note: Pulling of recoil starter rope will produce a
loud clattering sound. This is not harmful to the
engine or the starter.
TO STOP ENGINE:
1. Release traction and auger drive control
(Fig. 13).
2. Move throttle to slow and rotate ignition
key to OFF (Fig. 14).
OPERATING INSTRUCTIONS
SNOWTHROWING TIPS
1. When snowthroweris not being used, close
fuel shut-off valve, and remove key from the
switch.
2. Remove snow as soon as possible after it
falls, This will produce best snow removal
results,
3. If snow will be removed from crushed rock
or gravel areas, adjust skids so bottom of
auger housing clears the rocks: refer to
Adjusting Skids, page 12.
10
4. For concrete or asphalt surfaces, adjust
skids so there is 1/8 inch (3.2 mm) between
bottom of auger and concrete or asphalt
surface,
5. The snowthrower is designed to clean most
of the snow down to the contact surface, but
there are times when front of snowthrower
may tend to ride up. If this happens, reduce
forward speed by shifting into a lower gear. If
front still tends to ride up. lift up on both
handles to hold down front of snowthrower.
OPERATING INSTRUCTIONS
6. Discharge snow downwind whenever
possible, and overlap each swath to assure
complete snow removal. If wheels slip, shift
into a lower gear which reduces forward
speed.
7. Normally, chains are not required; how-
ever, tire chains are recommended when the
wheels spin excessively
8. Insome snow and cold weather conditions,
some controls and moving parts may freeze
solid. Therefore, when any control becomes
hard to operate, stop the engine; then check
all parts for freeze up. DO NOT USE
EXCESSIVE FORCE AND TRY TO OPERATE
THE CONTROLS WHEN FROZEN. Free all
controls and moving parts before operating.
MAINTENANCE
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ÁN caurion
To prevent accidental starting of the
engine while performing maintenance,
rotate ignition key to off and remove it
from the switch. Next, pull high tension
wire off spark plug (Fig. 15) and make
sure wire does not accidentally touch
the plug.
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DRAINING GASOLINE
1. Close fuel shut off valve located under
engine.
2. Place a clean drain pan under shut off
valve,
3. Loosen hose clamp securing fuel line to
valve and slide line off valve.
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A CAUTION
Since gasoline is highly flammable,
drain it outdoors and make sure engine
is cool to prevent a potential fire hazard.
Wipe up any gasoline that may have
spilled. Do not drain gasoline near any
open flame or where gasoline fumes
may be ignited by à spark. Do not smoke
a cigar, cigarette, or a pipe when
handling gasoline.
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4. Open valve allowing fuel to flow into drain
pan.
5. Reinstall fuel line and secure with hose
clamp.
LUBRICATING SNOWTHROWER
Lubricate the moving parts of the snow-
thrower after every 15 hours of operation
1. Drain gasoline from fuel tank.
2. Tip snowthrower onto auger housing and
block it so it cannot fall. Now remove four
thread forming screws holding bottom cover
In place, and slide shield away from unit (Fig.
16).
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Figure 16
1. Thread forming screws
3. Lightly lubricate points shown with SAE
10W-40 oil or grease (Fig. 17). Wipe up any
excess oil or grease.
4. Install bottom cover with four thread form-
ing screws.
IMPORTANT: Do not get oil or grease on
rubber wheel or friction drive plate because
the wheel will slip and rubber may deteriorate.
Figure 17
11
MAINTENANCE
CHANGING CRANKCASE OIL
Initially, change oil after the first 2 hours of
engine operation; thereafter, change oil after
every 25 hours of engine operation or annually.
If possible, run engine just before changing
oil because warm oil flows better and
carries more contaminants than cold oil.
Note: Drain oil when fuel tank is empty to
prevent spilling gasoline.
1. Pull high tension wire off spark plug and
make sure wire does not contact plug
accidentally.
2. Putatwo inch block under the right wheel
so snowthrower is tipped slightly to the side.
This will assure that all oil drains from
crankcase.
3. Clean area around oil drain cap. Next, slide
Oil drain pan below drain extension: then
remove oil drain cap (Fig. 18).
Figure 18
1. Oil drain cap
4. After all oil is drained, install oil drain cap.
Also, REMOVE BLOCK FROM UNDER
RIGHT WHEEL.
5. Position snowthrower on a level surface.
Next, fill crankcase with oil: use Fill Crankcase
With Oil, page 8. Wipe up any oil that may have
spilled.
AUGER GEAR BOX
The auger gear box is filled with grease at the
factory so regular maintenance is not re-
quired. However, if grease must be replaced
in gear box:
1. Remove pipe plug (Fig. 19).
2. Fill gear box with a low temperature-high
pressure grease such as Lubriplate Mag-1.
Capacity 4 oz.
3. Reinstall pipe plug.
12
Figure 19
1. Gear box
2. Pipe plug
ADJUSTING SKIDS AND SCRAPER BLADE
When snowthrower will be used on concrete
or asphalt surfaces, adjust skids using steps 1
and 2. However, use only step 3 when snow-
thrower will be used on gravel or crushed rock
surfaces.
1. Move snowthrower to a level surface. Next,
loosen four flange nuts (Fig. 20) securing both
skids to auger side plates. Skids must slide up
and down.
Sn
9
8 à
Figure 20
1. Skid
2. Auger housing
2. Adjust both skids so there is 1/8 of an inch
(3 mm) between bottom of auger and level
surface. When skids are adjusted correctly,
tighten flange nuts. Next, check scraper blade
that is mounted at bottom of auger housing
(Fig. 21). To adjust scraper, loosen five
mounting screws, level scraper, and retighten
screws. Scraper must be parallel with level
surface,
MAINTENANCE
Figure 21
1. Scraper
2. Mounting screws
Note: Do not use step 3 if unit is to be used on
smooth or hard surfaces.
3. Loosen four flange nuts (Fig. 20) securing
both skids to auger side plates. Next, slide
skids down as far as possible so auger is as far
from level surface as skid adjustment allows;
then tighten flange nuts.
Note: If bottom scraper is excessively worn,
replace it.
ADJUSTING AUGER CONTROL IF UNIT
WILL NOT THROW SNOW
1. Measure the distance between the center of
handle and the tip of the auger control lever.
2. Remove cotter pin and clevis pin securing
clevis to lower control rod (Fig. 22).
3. Loosen jam nut and rotate clevis clockwise
to increase dimension measured by 1/4 inch,
4. Reinstall clevis pin, cotter pin and tighten
jam nut.
5. Check unit performance and repeat Steps 1
thru 4 as required.
Mote: Do not increase dimension more than
necessary for satisfactory performance.
Figure 22
1. Cotter pin 3. Clevis
2. Clevis pin 4. Jam nut
REPLACING AUGER/IMPELLER
DRIVE BELT
When auger/impeller drive belt (Fig. 24)
becomes worn, stretched, oil-soaked, or
otherwise defective, belt replacement is
required.
1. Pull high tension wire off spark plug and
make sure it does not contact the plug
accidentally.
2. Remove two thread forming screws holding
belt cover in place, and set belt cover aside
(Fig. 23).
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Figure 23
1. Belt cover
13
MAINTENANCE
3. Remove auger drive belt from engine pulley
and large auger/impeller pulley (Fig. 23).
Figure 24
1. Traction drive belt
2. Auger/impeller drive belt
4. Install new belt around large auger/
impeller pulley (Fig. 24). Next, loop belt over
engine pulley, making sure that belt is on
inside of idler pulley and wire belt guide
(Fig. 24).
5. Install belt cover with two thread forming
SCrews.
REPLACING TRACTION DRIVE BELT
When traction belt becomes worn, stretched,
oil-soaked, or otherwise defective, belt re-
placement is required.
1. Pull high tension wire off spark plug and
make sure it does not contact the plug
accidentally. Drain gasoline from fuel tank.
2. Remove two thread forming screws holding
belt cover in place, and set belt cover aside.
(Fig. 23).
3. Remove auger/impeller drive belt: refer to
Replacing Auger/Impeller Drive Belt, page 13.
4. Tip snowthrower onto auger housing and
block it so it cannot fall. Remove rear shield
and disconnect spring from side plate
(Fig. 25).
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1, Spring
5. Set unit upright and remove traction drive
belt from engine pulley and large traction
pulley (Fig. 24).
6. Install new belt around large traction pulley
(Fig. 24). Next, loop belt over engine pulley,
making sure that belt is on inside of traction
idler pulley and wire belt guide (Fig. 24). Tip
snowthrower onto auger housing. block it and
hook spring onto side plate (Fig. 25). Replace
rear shield and set unit upright.
7. Replace auger/impeller drive belt: refer to
Replacing Auger/Impeller Drive Belt, item 4-5.
ADJUSTING TRACTION DISC
If snowthrower does not drive in reverse or
forward speeds, an adjustment is required.
1. Loosen locknuts securing upper traction
control rod to lower traction control rod
(Fig. 26).
Figure 26
Upper locknut
Lower locknut
Upper traction control rod
Lower traction control rod
Be Loh ==
MAINTENANCE
2. Adjust upper locknut (Fig. 26) until there is
approximately 5 inches (12.7cm) between the
center of the handle and the tip of the traction
control lever (Fig. 27).
FF
Figure 27
1, Traction control lever
2. Approximately 5 inches (12.7 cm)
3. Test run unit to check adjustment. (Wheels
should spin when holding handles). Repeat
adjustment, if necessary, in 1/2 inch (13 mm)
increments.
ADJUSTING SPEED SELECTOR
If there is slow or no ground speed in No. 1
speed selection, or speed selector cannot be
moved into No. 3 speed selection, an adjust-
ment of the speed selector linkage is required.
1. Remove four thread forming screws secur-
ing bottom cover to frame. Remove bottom
cover (Fig. 28).
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Figure 28
1. Four thread forming screws
2. Loosen flange nuts securing selector plate
to escutcheon plate. This allows selector plate
to move freely for adjustment (Fig. 29).
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Figure 29
1. Speed selector plate flange nuts
3. Shift speed selector to third gear and push
down on speed selector plate to move drive
assembly to the right. Drive assembly should
contact roll pin; if not, push to the right to
make a contact (Fig. 30).
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Figure 30
1. Rolipin 2 Drive assembly
4. With drive assembly in the farthest right
position contacting roll pin, tighten flange
nuts securing speed selector plate.
5. Shift speed selector to R (REVERSE) and
back to third to check adjustment. If space
between roll pin and drive assembly is more
than 1/16 of aninch (1.6 mm), repeat steps 2, 3
and 4.
6. Reassemble bottom cover.
15
MAINTENANCE
REPLACING SPARK PLUG
Correct spark plug to use is a Champion RJ-
17LM or Autolite AR7N, and correct air gap is
0.030 of an inch (0.76 mm). Since air gap
between center and side electrodes of the
spark plug increases gradually during normal
engine operation, install a new plug after
every 25 hours of engine operation.
1. Clean area around spark plug so foreign
matter cannot fall into cylinder when plug is
removed.
2. Pull high tension wire off spark plug and
remove plug from cylinder head.
IMPORTANT: A cracked, fouled, or dirty spark
plug must be replaced. Do not sand blast,
scrape, or clean electrodes, because grit may
eventually release from the plug and fall into
the cylinder. The result will likely be engine
damage.
3. Set air gap between electrodes of new
spark plug at 0.030 of an inch (0.76 mm),
(Fig. 31). Next, install spark plug in cylinder
head. Tighten plug to 15 ft-lb (20.4 N-m). If
torque wrench is not used, tighten plug firmly.
L 0.030"
(0.76 mm)
Figure 31
4. Push the high tension wire onto spark plug.
ADJUSTING CARBURETOR
The carburetor has been adjusted at the
factory, but an occasional adjustment may be
required. However, do not make unnecessary
carburetor adjustments because factory
settings are usually satisfactory.
1. Remove carburetor heater box: use
Starting and Stopping Instructions, paragraph
one, steps A & B page 10.
IMPORTANT: Do not close power adjusting
screw too tight because the screw and seat
will likely be damaged.
2. Power adjusting screw (Fig. 32) — Close
screw by gently rotating it clockwise until a
slight seating resistance is felt. Next, rotate
16
power adjusting screw 1 full turn — 360° —
counterclockwise.
Figure 32
1. Power adjusting screw
2. Idle mixture screw
3. Idler speed screw
IMPORTANT: Do not close idle mixture screw
too tight because the screw and seat will likely
be damaged.
3. Idle mixture screw (Fig. 32) — Close screw
by gently rotating it clockwise until a slight
seating resistance is felt. Next, rotate idle
mixture screw 1% full turns counterclockwise.
Note: The settings for the power adjusting
screw and the idle mixture screw are approxi-
mate; however, these settings will allow
engine to be started so carburetor can be fine
tuned — steps 4-7.
4. Start engine and let it warm up for
approximately 3 to 5 minutes: then move
throttle to FAST.
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Engine must be running so final adjust-
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formed. To guard against possible |
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and wheel drive controls, and remember
to keep hands, feet, face, and other parts |
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discharge chute, and any moving |
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MAINTENANCE
5. Rotate power adjusting screw (Fig. 32)
clockwise — in — 1/8 turn at a time until
engine misses because of a lean gasoline
mixture. Then rotate screw counterclockwise
— out — 1/8 turn at a time until engine runs
unevenly because of a rich gasoline mixture.
Next, rotate power adjusting screw clockwise,
back to the midpoint between the rich and
lean setting so engine runs smoothly.
Mote: Wait several seconds between each 1/8
turn setting so engine can adjust to the new
fuel mixture.
6. Move throttle to idie speed. Next, rotate ¡dle
speed screw (Fig. 32) until engine idles fast
—1750 rpm.
7. Rotate idle mixture screw (Fig. 32) clock-
wise — in — 1/8 turn at a time until engine
begins to miss because of a lean mixture.
Then rotate screw counterclockwise — out —
178 turn at a time until engine runs unevenly
because of rich mixture. Next, rotate idle
mixture screw clockwise, back to the mid-
point between rich and lean setting.
Note: Wait several seconds between each 1/8
turn setting so engine can adjust to the new
fuel mixture.
8. Again, rotate idle speed screw (Fig. 32)
until engine idles at 1750 rpm.
9. Check carburetor adjustment by quickly
moving throttle from low speed to high speed.
Engine should accelerate without hesitation
or sputtering. If engine does not accelerate
properly, adjust carburetor to a slightly richer
mixture. Also, if engine falters under load,
open power adjusting screw 1/8 turn counter-
clockwise.
10. After carburetor is adjusted, shut engine
off. Install carburetor heater box.
PREPARING SNOWTHROWER
FOR STORAGE
1. Drain gasoline from fuel tank, refer to
Draining Gasoline, page 11. Wipe up any
gasoline that may have spilled.
2. Start the engine and let it run until it stops
because there is no gasoline in the fuel
system. When engine sputters, push choke
down so fuel in carburetor is expended,
3. Remove spark plug from cylinder head.
Next. pour two teaspoons of SAE 30 engine ail
into spark plug hole in cylinder head. Install
spark plug in cylinder head, but do not install
high tension wire on the plug. Then pull recoil
starter slowly to distribute oil on inside of
cylinder.
4. Lubricate the snowthrower: refer to
Lubricating Snowthrower, page 11. Change
crankcase oil: refer to Changing Crankcase
Oil, page 12.
5. Clean the snowthrower. Touch up chipped
surfaces with paint. Sand affected areas
before painting, and use a rust preventative to
prevent metal parts from rusting.
6. Tighten all screws and nuts. If any part is
damaged, repair or replace it.
7, Store snowthrower in a clean, dry place,
and cover it to give protection.
8. If snowthrower is equipped with the
optional, drift breaker storage bar, the snow-
thrower may be stored in upright position.
Make sure to drain gas before tipping snow-
thrower upright on auger housing.
IDENTIFICATION AND ORDERING
MODEL AND SERIAL NUMBERS
The snowthrower has two identification
numbers: a model number and a serial
number. The two numbers are stamped on a
decal which is located on rear housing
between handles. In any correspondence
concerning the snowthrower, supply model
and serial numbers to assure that correct
information and replacement parts are
obtained.
To order replacement parts from an Author-
ized TORO Service Dealer, supply the
following information:
1. Model and serial numbers of the snow-
thrower.
2. Part number, description, and quantity of
part(s) desired.
Note: Do not order by reference number if a
parts catalog is being used; use the PART
NUMBER.
17
MAINTENANCE RECORD
Date
Hours Used
Oil Change
Lubrication
Summer
Storage
Fall Service
Spark Plug
Gap
18
MAINTENANCE RECORD
Date
Hours Used
Oil Change
Lubrication
Summer
Storage
Fall Service
Spark Plug
Gap
UPL-46621
19
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