FORM NO. 3316–636 Rev. A 521 Snowthrower Model No.
WARNING: The engine exhaust from this product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
Figures 1 3 646 473 1. Model and serial number decal 1. Axle pin 2. Outer axle hole 2 3. Inner axle hole and wheel hub 4 885 653 1. Handle 2. Capscrews and curved washers 3. Axle pin 1. Small wire connector and Phillips head screw 2.
3 5 7 1 2 2 3 1 648 1. Speed selector arm 2. Speed selector rod 4 3. Flat washer and cotter pin 879 1. Auger control lever 2. Traction control lever 6 3 4 3. Speed selector 4. Speed selector rod 1 8 3 1 2 4 4 654 1. Traction rod 2. Loop 3. Lower traction rod 4. Flange nuts 2 1. Traction control lever 2. Handgrip ii 665 3. Approximately 4#/8 inches 4.
9 10 5 3 1 3 1 4 2 4 6 649 1. Jam nut 2. Clevis 3. Upper control rod 4. Lower control rod 5. Clevis pin 6. Cotter pin 2 665 1. Auger control lever 2. Handgrip 3. Approximately four inches 4. One to two inches 2 11 1 886 1. Chute control bracket and rod 2.
12 14 2 1 3 3 1 2 658 1. Worm gear and bracket 2. Bolt, pyramidal washer and locknut 3. Mounting flange 883 1. Filler hole 2. Dipstick 13 3. Fuel tank cap 15 2 1 2 3 6 8 4 5 7 7 3 1 4 5 6 667 879 1. 2. 3. 4. iv Chute Deflector Carriage bolt Rubber washer 5. 6. 7. 8. Friction plate Large flat washer Curved washer Locknut 1. 2. 3. 4. Auger drive control Traction control Speed selector Ignition switch 5. Discharge chute control 6. Fuel shut–off valve 7.
16 18 2 3 2 1 4 1. Skid 2. Auger side plate 1 3 1. Choke 2. Primer 884 3 19 3. Throttle 4. Recoil starter 17 651 3. Flange nuts 2 2 1 3 1 652 1. Scraper 2. Mounting screws 3. Auger blades 20 2 1. Carburetor heater box 2. Phillips screws 880 2 3. Hex head screw 1 3 881 1. Fuel shut–off valve 2. Hose clamp 3.
21 23 646 885 1. Drain plug 1. Four screws 24 22 652 887 vi 1.
25 26 6 1 5 4 2 3 2 664 1 1. 2. 3. 4. 5. Large auger/impeller pulley 6. Engine pulley Traction drive belt Auger/impeller drive belt Belt guide Idler pulley 661 1. Belt cover 2. Screw (2) 27 1 3 2 1. Spring 2. Notch in side plate 650 3.
28 30 3 2 1 2 659 1 660 1. Flange nuts 2. Speed selector plate 1. Power adjusting screw 2. Idle mixture screw 29 3. Idle speed screw 31 1 880 1 2 1. Spark plug wire 32 !/8 0.030" (0.76 mm) 650/913 1. Roll pin 2.
Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Before Operating . . . . . . . . . . . . . . . . . . . . While Operating . . . . . . . . . . . . . . . . . . . . . Maintaining Snowthrower . . . . . . . . . . . . . Safety Decals and Instructions . . . . . . . . . . Loose Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The Toro warning system in this manual identifies potential hazards and has special safety messages that help you and others avoid personal injury, even death. DANGER, WARNING and CAUTION are signal words used to identify the level of hazard. However, regardless of the hazard, be extremely careful. Before Operating 1. Read and understand the contents of this manual before operating the snowthrower. Become familiar with all controls and know how to stop the engine quickly.
B. C. Fill fuel tank outdoors, not indoors. NEVER ADD FUEL TO AN ENGINE THAT IS RUNNING OR HOT. Engine must be cool to reduce potential fire hazard. Open doors if engine will be started in the garage because exhaust fumes are dangerous and could possibly be deadly. Do not run engine indoors. D. Wipe up any spilled gasoline. Reinstall gasoline container cap and snowthrower fuel tank cap securely before starting the engine. While Operating 10.
22. Do not touch engine while it is running or soon after it is 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. 23. Never operate snowthrower at high transport speeds on slippery surfaces. Use care when backing. Maintaining Snowthrower 24. Perform only those maintenance instructions described in this manual. Shut engine off before performing any maintenance service or adjustment.
BEFORE OPERATING Read and understand the contents of this manual before operating the snowthrower. Become familiar with all controls and know how to stop the engine quickly. CAUTION: IMPROPER USE MAY RESULT IN LOSS OF FINGERS, HANDS OR FEET. HIGH SPEED IMPELLER WITHIN 2 INCHES OF OPENING OPERATOR'S POSITION 1508 472 LOW SPEED AUGER HAS MOVING PINCH POINT, CLOSE TO OPENING.
Safety Decals and Instructions Safety decals and instructions are easily visible to the operator and are located near any area of potential danger. Replace any decal that is damaged or lost. ON CONTROL PANEL (Part No. 66–6830) ALONGSIDE THROTTLE (Part No. 63–2450) ON AUGER HOUSING (Part No. 53–76 70) NEXT TO PRIMER (Part No. 62–5760) ON CONTROL PANEL (Part No. 66–6560) ON CHUTE CONTROL BRACKET (Part No. 63–3510) ON ENGINE (Part No. 66–6840) 6 ABOVE CHOKE (Part No.
Loose Parts Part Qty Use Cotter Pin 1 Flat Washer 1 Capscrews & Curved Washers 4 Clevis Pin 1 Cotter Pin 1 Flange Nut 2 Capscrew & Locknut 1 Locknut & Pyramidal Washer 1 Flange Head Capscrew 1 Carriage Bolt 1 Rubber Washer 1 Friction Plate 1 Large Flat Washer 1 Curved Washer 1 Locknut 1 Key 1 Use in Ignition Switch Registration Card 2 Used to Validate Product Warranty Install on Speed Selector Rod Install Handle I Install ll A Auger & T Traction i D Drive i C Controll
Assembly Note: Determine left and right sides of snowthrower by standing in the normal operating position. Install Handle 1. Remove tie straps securing control rods to handle. 2. Remove the axle pins from both wheels and slide the wheels outward on the axle approximately one inch to make clearance for assembly of handles. 3. Position left handle against side of unit, align handle mount holes with holes in side plate, and secure with two capscrews and curved washers until finger tight (Fig. 2).
Install Auger Drive Control Linkage 1. 2. 3. 4. 2. Loosen jam nut above clevis on upper control rod (Fig. 9). Apply No. 2 general purpose grease to worm gear. Next, mount worm gear and bracket to mounting flange and secure with pyramidal washer and locknut (Fig. 12). 3. Align holes in clevis and lower control rod and insert clevis pin (Fig. 9). Slide worm gear into teeth of chute retaining ring and tighten locknut (Fig. 12). 4.
Before Starting Fill Fuel Tank With Gasoline Fill Crankcase With Oil The engine is shipped from the factory without oil in the crankcase. Therefore, before starting the engine, oil must be added to the crankcase. POTENTIAL HAZARD • In certain conditions gasoline is extremely flammable and highly explosive. IMPORTANT: Check level of oil every 5 operating hours or each time unit is used.
seasons. Toro Stabilizer/Conditioner cleans the engine during operation and prevents gum–like varnish deposits from forming in the engine during periods of storage. Ignition Switch (Fig. 15)—Switch has two positions: ON and OFF. Rotate key to ON position before starting engine with the recoil starter. To stop engine, rotate key to OFF. DO NOT USE FUEL ADDITIVES OTHER THAN THOSE MANUFACTURED FOR FUEL STABILIZATION DURING STORAGE SUCH AS TORO’S STABILIZER/CONDITIONER OR A SIMILAR PRODUCT.
1. 2. Remove (2) Phillips screws and (1) hex head screw securing heater box in place (Fig. 17). Pull choke knob off choke rod (Fig. 16). Lift heater box up and away from the engine, and reinstall choke knob on mounting pin. IMPORTANT: Check auger and impeller to ensure that both parts are not frozen but free to rotate. Also, make sure discharge chute is not obstructed. USE A STICK, NOT YOUR HAND, TO REMOVE ANY OBSTRUCTIONS. 1. Move throttle (Fig. 16) to FAST. 2.
5. Discharge snow downwind whenever possible, and overlap each swath to ensure complete snow removal. If wheels slip, shift into a lower gear to reduce forward speed. 9. In wet or slushy conditions, clogging of the discharge chute will be reduced by maintaining maximum engine speed and by not overloading the engine. 6. Run snowthrower for a few minutes after clearing snow so moving parts do not freeze. Engage auger to clear any remaining snow from inside housing. 7.
flange nuts securing both skids to the auger side plates (Fig. 18). Skids will now support the auger blades and scraper above the ground. POTENTIAL HAZARD • Gasoline is highly flammable. For Gravel Surfaces WHAT CAN HAPPEN • Gasoline can be ignited and cause serious For gravel or crushed rock surfaces, adjust the skids to prevent picking up rocks. 1. Pull wire off spark plug and make sure wire does not contact plug accidentally. 2.
4. 5. Lightly lubricate snowthrower with light oil and grease as shown in Figure 22. Wipe up any excess oil or grease. 2. Clean area around pipe plug so dirt is removed. 3. Remove pipe plug from gear box (Fig. 24). IMPORTANT: Do not get oil or grease on rubber wheel or friction drive plate because the wheel will slip and the rubber may deteriorate. 4. Check level of grease in gear box. Grease must be visible through opening. 5.
4. Install new belt around large auger/impeller pulley (Fig. 26). Next, loop belt over engine pulley, making sure that belt is on inside of idler pulley and belt guide (Fig. 26). 5. Adjust auger drive linkage. Refer to steps 4–6 of Install Auger Drive Control Linkage, page 9. 6. Reinstall belt cover with (2) screws. 8. Set unit upright and remove traction drive belt from engine pulley and large traction pulley (Fig. 26). 9. Install new belt around large traction pulley.
1. Pull wire off spark plug and make sure wire does not contact plug accidentally. 2. Remove (4) screws securing bottom cover to frame. Remove cover (Fig. 21). 3. Loosen flange nuts securing selector plate to control panel. This allows selector plate to move freely for adjustment (Fig. 28). 4. Shift speed selector to third gear and push down on speed selector plate to move drive assembly to the right. Drive assembly should be !/8” from roll pin; if not, slide selector plate (Fig.
Note: 6. Move throttle to idle speed. Next, rotate idle speed screw until engine idles fast—1750 rpm. 7. Rotate idle mixture screw (Fig. 30) clockwise—in—1/8 turn at a time until engine begins to miss because of a lean mixture. Then rotate screw counterclockwise—out—1/8 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 settings. Note: IMPORTANT: A cracked, fouled or dirty spark plug must be replaced.
4. Clean the snowthrower. Touch up chipped surfaces with paint. Toro Re–Kote paint is available from an Authorized TORO Service Dealer. Sand affected areas before painting, and use a rust preventative to prevent metal parts from rusting. 5. Tighten all screws and nuts. If any part is damaged, repair or replace it. 6. Store snowthrower in a clean, dry place, and cover it for protection.
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Gas Powered Consumer Products Except WPM THE TORO TOTAL COVERAGE GUARANTEE A Full TwoĆYear Warranty (Limited Warranty for Commercial Use) What Is Covered By This Express Warranty? The Toro Company promises to repair any TORO Product used for normal residential purposes* if defective in materials or workmanship for a period of two years from the date of purchase. The cost of parts and labor is included, but the customer pays the transportation costs.
