SGR-13 Stump Grinder

Model No. 22619-Serial No. 400000000 and Up

Introduction

This machine is designed to grind and remove tree stumps and surface roots. It is not intended to cut rock or any other material other than wood and the soil around a stump.

Read this information carefully to learn how to operate and maintain your product properly and to avoid injury and product damage. You are responsible for operating the product properly and safely.

You may contact Toro directly at www.Toro.com for product and accessory information, help finding a dealer, or to register your product.

Whenever you need service, genuine Toro parts, or additional information, contact an Authorized Service Dealer or Toro Customer Service and have the model and serial numbers of your product ready. Figure 1 illustrates the location of the model and serial numbers on the product. Write the numbers in the space provided.

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Figure 1

  1. Model and serial number plate

This manual identifies potential hazards and has safety messages identified by the safety-alert symbol (Figure 2), which signals a hazard that may cause serious injury or death if you do not follow the recommended precautions.

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Figure 2

  1. Safety-alert symbol

This manual uses 2 words to highlight information. Important calls attention to special mechanical information and Note emphasizes general information worthy of special attention.

This product complies with all relevant European directives; for details, please see the separate product specific Declaration of Conformity (DOC) sheet.

Danger

There may be buried power, gas, and/or telephone lines in the work area. Shock or explosion may occur if you dig into them.

Have the property or work area marked for buried lines and do not dig in marked areas. Contact your local marking service or utility company to have the property marked (for example, in the United States, call 811 for the nationwide marking service).

This spark ignition system complies with Canadian ICES-002

Genuine Toro spark arresters are approved by the USDA Forestry Service.

The enclosed engine owner's manual is supplied for information regarding the US Environmental Protection Agency (EPA) and the California Emission Control Regulation of emission systems, maintenance, and warranty. Replacements may be ordered through the engine manufacturer.

Safety

Improper use or maintenance by the operator or owner can result in injury. To reduce the potential for injury, comply with these safety instructions and always pay attention to the safety alert symbol Graphic, which means: Caution, Warning, or Danger—personal safety instruction. Failure to comply with the instruction may result in personal injury or death.

Safe Operating Practices

This product is capable of amputating hands and feet. Always follow all safety instructions to avoid serious injury or death.

Warning

Engine exhaust contains carbon monoxide, an odorless poison that is fatal if inhaled.

Do not run the engine indoors or in an enclosed area.

Training

  • Read the Operator's Manual and other training material. If the operator(s) or mechanic(s) cannot read English, it is the owner's responsibility to explain this material to them.

  • Become familiar with the safe operation of the equipment, operator controls, and safety signs.

  • All operators and mechanics should be trained. The owner is responsible for training the users.

  • Never let children or untrained people operate or service the equipment. Local regulations may restrict the age of the operator.

  • The owner/user can prevent and is responsible for accidents or injuries occurring to himself or herself, other people or property.

Preparation

Danger

There may be buried power, gas, and/or telephone lines in the work area. Digging into them may cause a shock or an explosion.

Have the property or work area marked for buried lines and do not dig in marked areas. Contact your local marking service or utility company to have the property marked (for example, in the US, call 811 or in Australia, call 1100 for the nationwide marking service).

  • Wear appropriate clothing including gloves, eye protection, long pants, substantial slip-resistant footwear, and hearing protection. Tie back long hair and do not wear jewelry.

  • Inspect the area where you will use the equipment and remove all objects, such as rocks, toys, and wire, that the machine could throw.

  • Use extra care when handling fuel. Fuel is flammable and its vapors are explosive.

    • Use only an approved container.

    • Never remove the fuel cap or add fuel with the engine running. Allow the engine to cool before refueling. Do not smoke.

    • Never refuel or drain the machine indoors.

  • Check that the operator's presence controls, safety switches, and shields are attached and functioning properly. Do not operate the machine unless they are functioning properly.

Operation

  • Never run an engine in an enclosed area.

  • Operate the machine only in good light, keeping away from holes and hidden hazards.

  • Ensure that all the drives are in neutral and the parking brake is engaged before starting the engine. Start the engine only from the operator's position.

  • Never operate the machine without the guards securely in place. Ensure that all the interlocks are attached, adjusted, and functioning properly.

  • Do not change the engine-governor setting or overspeed the engine.

  • Park the machine on a level surface, engage the parking brake, and shut off the engine before leaving the operator's position for any reason.

  • Keep your hands and feet away from moving parts.

  • Look behind and down before backing up to ensure that the path is clear.

  • Do not operate the machine when you are tired, ill, or under the influence of alcohol or drugs.

  • Use care when loading or unloading the machine into a trailer or truck.

  • Ensure that the area is clear of people before operating the machine. Stop the machine if anyone enters the area.

  • Never leave a running machine unattended. Always shut off the engine, engage the parking brake and verify that moving parts have stopped before leaving the machine.

  • Never jerk the controls; use a steady motion.

  • Watch for traffic when operating near or crossing roadways.

  • Do not touch parts that may be hot from operation. Allow them to cool before attempting to maintain, adjust, or service the machine.

  • Before grinding, have the area marked for underground utilities and do not grind in marked areas.

  • Lightning can cause severe injury or death. If lightning is seen or thunder is heard in the area, do not operate the machine; seek shelter.

Maintenance and Storage

  • Park the machine on a level surface, engage the parking brake, and shut off the engine. Wait for all movement to stop before adjusting, cleaning, or repairing the machine.

  • Clean debris from the grinder, drives, mufflers, and engine to help prevent fires. Wipe up any spilled oil or fuel.

  • Allow the engine to cool before storing and do not store near flames.

  • Never allow untrained personnel to service the machine.

  • Carefully release pressure from components with stored energy.

  • Keep your hands and feet away from the moving parts. If possible, do not make adjustments with the engine running.

  • Remove the spark-plug wires before making any repairs.

  • Keep all parts in good working condition and all hardware tightened. Replace all worn or damaged decals.

  • Keep all nuts and bolts tight. Keep the equipment in good condition.

  • Never tamper with the safety devices.

  • Keep the machine free of grass, leaves, or other debris buildup. Wipe up any spilled oil or fuel. Allow the machine to cool before storing.

  • Use extra care when handling fuel; it is flammable and its vapors are explosive.

    • Use only an approved fuel container.

    • Never remove the fuel cap(s) or add fuel when the engine is running. Allow the engine to cool before refueling. Do not smoke.

    • Never refuel the machine indoors.

    • Never store the machine or fuel container inside where there is an open flame, such as near a water heater or furnace.

    • Never fill a container while it is inside a vehicle, trunk, pick-up bed, or any surface other than the ground.

    • Keep the container nozzle in contact with the tank during filling.

    • Do not store fuel near flames or drain indoors.

  • Shut off and inspect the machine if you strike an object. Make any necessary repairs before starting.

  • Use only genuine Toro replacement parts.

Safety and Instructional Decals

Graphic

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 missing.
decal117-4979

117-4979

  1. Entanglement hazard, belt—stay away from moving parts; keep all guards and shields in place.
decal119-4690

119-4690

  1. Warning; cutting/dismemberment hazard, grinding blade—keep hands and feet away from all moving parts, keep all shields in place; wait for all moving parts to stop.
decal119-4692

119-4692

  1. Warning—shut off the engine; use both hand holds to lift the grinder.
decal119-4693

119-4693

  1. Thrown object hazard—keep bystanders a safe distance away from the machine.
decal119-4721

119-4721

  1. Engage
  2. Grinding teeth
  3. Disengage, engine runs
decal130-8322

130-8322

  1. Use only fuel with an alcohol content by volume under 10%.
  2. Read the Operator's Manual for more information on fuel.
  3. Do not use fuel with an alcohol content by volume greater than 10%.
decal119-4701

119-4701

  1. Warning—read the Operator's Manual.
  2. Warning—do not operate this machine unless you are trained.
  3. Thrown object hazard—keep bystanders a safe distance away from the machine.
  4. Thrown object hazard—wear eye protection; pick up debris before operating the machine.
  5. Crushing hazard of hand—stay away from moving parts; keep all guards and shields in place.
  6. Explosion hazard; electrical shock hazard—do not dig in areas with buried utility lines; contact local power organizations before digging.
  7. Warning—remove the key (if applicable) and read the instructions before servicing or performing maintenance.
decal132-4004

132-4004

  1. Warning, cutting wheel—to adjust the cutting wheel teeth between jobs 1) Loosen the nut; 2) Push the tooth down and rotate it 1/3 turn; 3) Tighten the nut to 68 N·m (50 ft-lb); 4) Proceed with grinding.

Product Overview

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Figure 3

  1. Throttle lever
  2. Hour meter
  3. Cyclone air filter
  4. Choke lever
  5. Fuel valve
  6. Sediment cup
  7. Recoil-start handle
  8. Cutting wheel
  9. Belt cover
  10. Lift handle
  11. Fuel cap
  12. Parking brake
  13. Safety bail
  14. Handle

Become familiar with all the controls (Figure 3) before you start the engine and operate the machine.

Throttle Lever

The throttle lever controls engine speed. With the lever down, in the DISENGAGED position, the engine runs at idle. This is also the starting position. When the engine speed increases, to the ENGAGED position, the centrifugal clutch engages and the cutting wheel rotates.

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Figure 4

  1. Disengaged throttle position
  2. Engaged throttle position

Parking Brake

The parking brake holds the left wheel from turning to secure the machine and for easy movement of the machine from side to side when grinding a stump (Figure 5).

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Figure 5

  1. Parking brake (engaged)
  2. Parking brake (disengaged)

Hour Meter

When the engine is off, the hour meter displays the number of hours of operation that have been logged on the machine.

Fuel Valve

The fuel valve (Figure 6) is located underneath the choke lever. Move the lever for the fuel valve to the ON position before attempting to start the engine.

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Figure 6

  1. Choke
  2. Fuel valve
  3. Recoil-start handle

Choke Lever

Use the choke lever (Figure 6) to start a cold engine. Before pulling the recoil-start handle, move the choke lever to the CLOSED position. Once the engine is running, move the choke lever to the OPEN position. Do not use the choke if the engine is already warmed up or if the air temperature is high.

Recoil-Start Handle

To start the engine, pull the recoil-start handle (Figure 6) quickly to turn the engine over. Refer to Starting the Engine for the correct starting procedure.

Note: Specifications and design are subject to change without notice.

Cutting Depth30 cm (12 inches)
Length193 cm (76 inches)
Width75 cm (29.5 inches)
Height107 cm (42 inches)
Weight109 kg (240 lb)

Operation

Note: Determine the left and right sides of the machine from the normal operating position.

Important: Before operating the machine, check the fluid levels, and remove debris from the machine. Ensure that the area is clear of people and debris. You should also know and have marked the locations of all utility lines.

Before you Start

  • Dig away the earth and remove any stones near the tree stump that may interfere with your work. Check that the ground is free of foreign objects, such as electrical cables, barbed wire, etc.

  • Cut or trim the stump using a power saw.

  • Review all the safety decals on the machine.

  • Ensure that you are familiar with safety regulations and shutdown procedures described in this manual.

  • Ensure that all guards are in place and in good condition.

  • Ensure that the grinder teeth are in place and in good condition.

  • Ensure that the work area, cutter, and stump in particular are free from metallic objects such as wire, nails, etc. that could be thrown out and injure persons in the vicinity and damage the equipment.

Think Safety First

Carefully read all safety instructions and symbols in the safety section. Knowing this information could help you or bystanders avoid injury.

Caution

This machine produces sound levels that can cause hearing loss through extended periods of exposure.

Wear hearing protection when operating this machine.

Use protective equipment for your eyes, ears, hands, feet, and head.

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Figure 7

  1. Wear eye protection.
  2. Wear hearing protection.

Adding Fuel

Danger

In certain conditions, fuel is extremely flammable and highly explosive. A fire or explosion from fuel can burn you and others and can damage property.

  • Fill the fuel tanks outdoors, in an open area, when the engine is cold. Wipe up any fuel that spills.

  • Never fill the fuel tanks inside an enclosed trailer.

  • Never smoke when handling fuel and stay away from an open flame or where fuel fumes may be ignited by a spark.

  • Store fuel in an approved container and keep it out of the reach of children. Never buy more than a 30-day supply of fuel.

  • Do not operate without entire exhaust system in place and in proper working condition.

Danger

In certain conditions during fueling, static electricity can be released, causing a spark that can ignite the fuel vapors. A fire or explosion from fuel can burn you and others and can damage property.

  • Always place fuel containers on the ground away from your vehicle before filling.

  • Do not fill fuel containers inside a vehicle or on a truck or trailer bed, because interior carpets or plastic truck bed liners may insulate the container and slow the loss of any static charge.

  • When practical, remove equipment from the truck or trailer and refuel the equipment with its wheels on the ground.

  • If this is not possible, then refuel such equipment on a truck or trailer from a portable container rather than from a fuel-dispenser nozzle.

  • If you must use a fuel-dispenser nozzle, keep the nozzle in contact with the rim of the fuel tank or container opening at all times until fueling is complete.

Warning

Fuel is harmful or fatal if swallowed. Long-term exposure to vapors can cause serious injury and illness.

  • Avoid prolonged breathing of vapors.

  • Keep your face away from the nozzle and fuel tank opening.

  • Keep fuel away from your eyes and skin.

Fuel Recommendations

  • For best results, use only clean, fresh (less than 30 days old), unleaded gasoline with an octane rating of 87 or higher ((R+M)/2 rating method).

  • Ethanol: Gasoline with up to 10% ethanol (gasohol) or 15% MTBE (methyl tertiary butyl ether) by volume is acceptable. Ethanol and MTBE are not the same. Gasoline with 15% ethanol (E15) by volume is not approved for use. Never use gasoline that contains more than 10% ethanol by volume, such as E15 (contains 15% ethanol), E20 (contains 20% ethanol), or E85 (contains up to 85% ethanol). Using unapproved gasoline may cause performance problems and/or engine damage which may not be covered under warranty.

  • Do not use gasoline containing methanol.

  • Do not store fuel either in the fuel tank or in fuel containers over the winter unless you use a fuel stabilizer.

  • Do not add oil to gasoline.

Using Stabilizer/Conditioner

Use a fuel stabilizer/conditioner in the machine to provide the following benefits:

  • Keeps fuel fresh during storage of 90 days or less (drain the fuel tank when storing the machine for more than 90 days)

  • Cleans the engine while it runs

  • Eliminates gum-like varnish buildup in the fuel system, which causes hard starting

    Important: Do not use fuel additives containing methanol or ethanol.

    Add the correct amount of fuel stabilizer/conditioner to the fuel.

    Note: A fuel stabilizer/conditioner is most effective when mixed with fresh fuel. To minimize the chance of varnish deposits in the fuel system, use fuel stabilizer at all times.

Filling the Fuel Tank

  1. Park the machine on a level surface and engage the parking brake.

  2. Shut off the engine, remove the key, and allow the engine to cool.

  3. Clean around the fuel-tank cap and remove it (Figure 8).

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    Figure 8

    1. Fuel-tank cap

  4. Fill the tank with fuel to about 6 to 13 mm (1/4 to 1/2 inch) below the bottom of the filler neck.

    Important: This space in the tank allows fuel to expand. Do not fill the fuel tank completely full.

  5. Install the fuel-tank cap securely.

  6. Wipe up any spilled fuel.

Performing Daily Maintenance

Before starting the machine each day, perform the Each Use/Daily procedures listed in .

Starting the Engine

  1. Move the fuel valve to the OPEN position, all the way to the right (Figure 9).

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    Figure 9

    1. Choke lever
    2. Fuel valve
    3. Recoil-start handle

  2. Move the choke lever to the ON position (Figure 9).

    Note: A warm or hot engine may not require choking.

  3. Move the throttle lever to the DISENGAGE position.

  4. Hold the safety bail against the handle and push the handle down enough to raise the cutting wheel off the ground.

  5. Pull the recoil-start handle lightly until you feel resistance, then pull the handle briskly (Figure 9). Return the recoil-start handle gently.

  6. After the engine starts, gradually move the choke lever back to the OFF position. If the engine stalls or hesitates, move the choke back to the ON position again until the engine warms up. Then move it to the OFF position.

Shutting Off the Engine

  1. Move the throttle to the DISENGAGE position.

    Note: If the engine has been working hard or is hot, let it run for a minute before releasing the safety bail. This helps to cool the engine before shutting it off. In an emergency, the engine may be shut off immediately.

  2. Release the safety bail to shut off the engine.

  3. Move the fuel valve to the CLOSED position, all the way to the left.

Grinding a Stump

Danger

This machine is capable of amputating hands and feet.

  • Stay in the operating position while the machine is running, and keep away from moving parts.

  • Keep all bystanders a safe distance away from the machine.

  • Stop the machine immediately if any people or animals enter the work area.

Warning

Grinding a stump throws wood chips, soil, and other debris into the air, which could injure you or bystanders.

  • Always wear eye protection when using the grinder.

  • Keep all bystanders a safe distance away from the grinder.

Warning

The grinder is very loud when cutting a stump and can damage your ears.

Always wear hearing protection when using the grinder.

  1. Set throttle to the DISENGAGE position, start the engine, and allow the machine to warm up for 2 minutes.

  2. Push the handle down enough to raise the cutting wheel off the ground (Figure 10).

    g024547

    Figure 10

    1. Pivot point
    2. Pivot point when the parking brake is engaged

  3. Move the machine to the front of the stump and engage the parking brake.

  4. Move throttle up to the ENGAGE position. The cutting wheel will begin rotating.

  5. Swing the cutting wheel to one side (Figure 10), then lower it approximately 1 to 2.5 cm (1/2 to 1 inch) into the front-top corner of the stump.

    g024062

    Figure 11

  6. Swing the cutting wheel back and forth, lowering the cutting wheel approximately 1 to 2.5 cm (1/2 to 1 inch) before each sweep, until you have removed the front portion of the stump to ground level (A through D in Figure 11).

  7. Raise the cutting wheel, release the parking brake, and move the machine forward a few centimeters (inches). Engage the parking brake.

  8. Repeat steps 5 and 7 until you have completely removed the stump (E through H in Figure 11).

  9. Move throttle to the DISENGAGE position, push the handle down enough to raise the cutting wheel off the ground. Wait for the cutting wheel to stop rotating then release the parking brake and pull the machine away from the stump.

    Note: Do not let the front of the machine touch the ground until the cutting wheel has stopped turning.

  10. Shut off the engine; refer to Shutting Off the Engine.

Lifting the Machine

Use the handles shown in Figure 12 as lift points.

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Figure 12

  1. Lift handle (4)

Maintenance

Note: Determine the left and right sides of the machine from the normal operating position.

Important: You can tip the machine backward or on its side to clean or service it, but no longer than 2 minutes. If you hold the machine in this position for too long, fuel can drain into the crankcase and damage the engine. Should this happen, perform an extra oil change on the engine. Then turn the engine over a few revolutions with the starter handle before starting the engine again.

Caution

If you leave the key in the key switch, someone could accidently start the engine and seriously injure you or other bystanders.

Remove the key from the key switch and disconnect the wires from the spark plugs before you do any maintenance. Set the wires aside so that they do not accidentally contact the spark plugs.

Recommended Maintenance Schedule(s)

Maintenance Service IntervalMaintenance Procedure
After the first 20 hours
  • Change the engine oil.
    		•
    Before each use or daily
  • Grease the machine.
  • Check the air filter(more often in dirty or dusty conditions).
  • Check the engine-oil level.
  • Check the drive-belt tension.
  • Check the condition of the teeth; rotate or replace any that are worn or damaged and torque the nuts for all teeth.
  • Remove debris from the machine.
    		•
    Every 50 hours
  • Service the air filter(more often in dirty or dusty conditions).
    		•
    Every 100 hours
  • Change the engine oil.
  • Check the spark plugs.
  • Clean the sediment cup.
  • Replace the drive belt.
    		•
    Every 300 hours
  • Replace the spark plugs.
    		•
    Every 600 hours
  • Replace the air filter.
    		•
    Yearly or before storage
  • Change the engine oil.
  • Clean the sediment cup.
    		•

    Important: Refer to your engine owner’s manual for additional maintenance procedures.

    Lubrication

    Greasing the Machine

    Maintenance Service IntervalMaintenance Procedure
    Before each use or daily
  • Grease the machine.
    		•

    Grease Type: General-purpose grease.

    1. Park the machine on a level surface and engage the parking brake.

    2. Shut off the engine, remove the key, and allow the engine to cool.

    3. Clean the grease fittings with a rag.

    4. Connect a grease gun to each fitting.

    5. Lubricate the 2 fittings, 1 on each cutting-wheel bearing.

    6. Pump grease into the fittings until grease begins to ooze out of the bearings (approximately 3 pumps).

      Important: Pump grease in slowly and carefully to prevent damage to the bearing seals.

    7. Wipe up any excess grease.

      g024551

      Figure 13

    Engine Maintenance

    Servicing the Air Cleaner

    Maintenance Service IntervalMaintenance Procedure
    Before each use or daily
  • Check the air filter(more often in dirty or dusty conditions).
    		•
    Every 50 hours
  • Service the air filter(more often in dirty or dusty conditions).
    		•
    Every 600 hours
  • Replace the air filter.
    		•

    The cyclone air filter collects the largest contaminant particles, which collect in the container. When you can see a layer of dirt at the bottom of the container, clean the cyclone housing, air channels, and air-intake screen.

    Servicing the Cyclone Housing

    1. Park the machine on a level surface and engage the parking brake.

    2. Shut off the engine and remove the key.

    3. Remove the 3 screws holding the cyclone housing to the air-cleaner cover.

    4. Remove the housing with the air-intake screen and remove the air channels.

      g014508

      Figure 14

      1. Air-cleaner cover
      2. Screw
      3. Air channels
      4. Cyclone housing with air-intake screen

    5. Clean the components with water, detergent, and a brush then dry the components carefully.

    6. Place the air channels in the cyclone housing.

    7. Insert cyclone housing into position and make sure it fits in the upper portion.

      Important: Do not use force; align it in place before fitting the screws.

    Servicing the Air-Cleaner Elements

    Removing the Foam and Paper Elements

    1. Park the machine on a level surface and engage the parking brake.

    2. Shut off the engine and remove the key.

    3. Remove the wing nut and lift off the air-cleaner cover with the air-filter cowling (Figure 15).

      g014509

      Figure 15

      1. Wing nut
      2. Air-cleaner cover
      3. Foam element
      4. Paper element
      5. Stud

    4. Remove the foam element (Figure 15).

    5. Remove the wing nut on top of the paper element and remove the paper element (Figure 15).

    Servicing the Foam Air-Cleaner Element

    1. Wash the foam element using a mild detergent and water.

    2. Squeeze it dry with a clean cloth.

    3. Soak it with new engine oil.

    4. Gently squeeze out excess oil from the element in an absorbent cloth.

    Servicing the Paper Air-Cleaner Element

    1. Clean the paper element by tapping it gently to remove dust. If it is very dirty, replace the paper element with a new one (Figure 15).

    2. Inspect the element for tears, an oily film, or damage to the rubber seal.

    3. Replace the paper element if it is damaged.

      Important: Do not clean the paper filter.

    Installing the Foam and Paper Elements

    1. Mount the paper element in the air-cleaner housing and secure it with the wing nut.

    2. Position the foam element over the paper element.

    3. Install the air-cleaner cover and secure it with the wing nut.

    Servicing the Engine Oil

    Maintenance Service IntervalMaintenance Procedure
    After the first 20 hours
  • Change the engine oil.
    		•
    Before each use or daily
  • Check the engine-oil level.
    		•
    Every 100 hours
  • Change the engine oil.
    		•
    Yearly or before storage
  • Change the engine oil.
    		•

    Note: Change the oil more frequently when the operating conditions are extremely dusty or sandy.

    Oil Type: Detergent oil with an API service of SJ or higher.

    Crankcase Capacity: 1.1 L (1.2 US qt)

    Viscosity: Refer to the figure below.

    g013375

    Figure 16

    Checking the Engine-Oil Level

    1. Park the machine on a level surface and engage the parking brake.

    2. Shut off the engine and remove the key.

    3. Check the engine-oil level as shown in Figure 17.

    g205123g205124

    Figure 17

    Changing the Engine Oil

    Note: Dispose of the used oil at a recycling center.

    1. Start the engine and let it run for 5 minutes.

      Note: This warms the oil so that it drains better.

    2. Park the machine on a level surface and engage the parking brake.

    3. Shut off the engine and remove the key.

    4. Change the oil as shown in (Figure 18).

      g205123g031623

      Figure 18

    5. Slowly pour approximately 80% of the specified oil into the filler tube and slowly add the additional oil to bring it to the Full mark (Figure 19).

      g205128

      Figure 19

    Servicing the Spark Plug

    Maintenance Service IntervalMaintenance Procedure
    Every 100 hours
  • Check the spark plugs.
    		•
    Every 300 hours
  • Replace the spark plugs.
    		•

    Ensure that the air gap between the center and side electrodes is correct before installing the spark plug. Use a spark plug wrench for removing and installing the spark plug and a gapping tool/feeler gauge to check and adjust the air gap. Install a new spark plug if necessary.

    Type: BPR6ES (NKG) or equivalent

    Air Gap: 0.70 to 0.80 mm (0.28 to 0.031 inch)

    Removing the Spark Plug

    1. Park the machine on a level surface and engage the parking brake.

    2. Shut off the engine and remove the key.

    3. Locate and remove the spark plugs (Figure 20).

      g205129g027478

      Figure 20

    Checking the Spark Plug

    Important: Do not clean the spark plug(s). Always replace the spark plug(s) when it has: a black coating, worn electrodes, an oily film, or cracks.

    If you see light brown or gray on the insulator, the engine is operating properly. A black coating on the insulator usually means the air cleaner is dirty.

    Set the gap to 0.70 to 0.80 mm (0.28 to 0.031 inch).

    g027479

    Figure 21

    Installing the Spark Plug

    Tighten the spark plug(s) to 27 N∙m (20 ft-lb).

    g027735

    Figure 22

    Fuel System Maintenance

    Cleaning the Sediment Cup

    Maintenance Service IntervalMaintenance Procedure
    Every 100 hours
  • Clean the sediment cup.
    		•
    Yearly or before storage
  • Clean the sediment cup.
    		•

    Underneath the fuel valve is a sediment cup to catch dirt in the fuel.

    1. Park the machine on a level surface and engage the parking brake.

    2. Shut off the engine and remove the key.

    3. Move the fuel valve to the OFF position, all the way to the left.

    4. Unscrew the sediment cup (Figure 23).

      g014507

      Figure 23

      1. Sediment cup
      2. O-ring

    5. Clean the reservoir and the O-ring using a cleaning solvent and dry carefully.

      Note: Make sure not to misplace the O-ring.

    6. Place the O-ring in the groove of the cup and replace the sediment cup.

    7. Turn the fuel valve to the ON position, all the way to the right, and check for leaks.

      Note: If it leaks, replace the O-ring.

    Brake Maintenance

    Adjusting the Parking Brake

    1. Park the machine on a level surface and engage the parking brake.

    2. Shut off the engine and remove the key.

    3. Loosen the set screw on side of brake lever knob. Turn the knob clockwise to tighten the brake; turn the knob counter-clockwise to loosen the brake.

      Note: The left wheel should lock completely when the brake is engaged.

    4. Tighten the set screw.

    Belt Maintenance

    Adjusting the Drive-Belt Tension

    Maintenance Service IntervalMaintenance Procedure
    Before each use or daily
  • Check the drive-belt tension.
    		•

    Note: Inspect the drive belt through the slot on top of the belt cover. Adjust as required.

    1. Park the machine on a level surface and engage the parking brake.

    2. Shut off the engine and remove the key.

    3. Loosen the 2 bolts securing the belt guard to machine until you can remove the belt guard (Figure 24).

      Note: The bolts and washers will remain attached to the belt guard.

      g205161

      Figure 24

      1. Belt guard
      2. Bolt and washer (2)

    4. Remove the belt guard (Figure 24).

    5. Loosen the 4 engine-plate mounting bolts and the 4 bolts securing the rear of the belt guard to the engine.

    6. Loosen the belt-tension bolt and jam nut. Slide the engine toward the flywheel housing to loosen the belt (Figure 25).

      g016617

      Figure 25

      1. Tension bolt and jam
      2. Engine plate mounting bolt

    7. Adjust the drive-belt tension by tightening tension bolt and jam nut against the engine mounting plate, pushing the engine rearward.

    8. Lay a straightedge across the clutch and flywheel pulleys. Tighten the belt-tension bolt so there is 10 mm (0.40 inch) of flex in the belt when pushing down with 6.8 kg (15 lb) force at mid-span (when re-tensioning a belt in use), or with 8 kg (18 lb) force when installing a new belt (Figure 26).

      g017434

      Figure 26

      1. Straightedge
      2. Flex of 1 cm (0.40 inch)

    9. Ensure that the pulleys are aligned and the engine is parallel with the frame (not angled toward the side), then tighten the 4 engine-plate mounting bolts and the 4 bolts securing the rear of the belt guard to the engine.

    10. Install the belt guard and tighten the bolts.

    Replacing the Drive Belt

    Maintenance Service IntervalMaintenance Procedure
    Every 100 hours
  • Replace the drive belt.
    		•

    Note: Replace the belt if it shows any signs of wear, cracks, glazing, or damage.

    1. Park the machine on a level surface and engage the parking brake.

    2. Shut off the engine and remove the key.

    3. Loosen the bolts securing the belt guard to machine until you can remove the belt guard..

    4. Remove the belt guard (Figure 24).

    5. Loosen the 4 engine-plate mounting bolts and the 4 bolts securing the rear of the belt guard to the engine.

    6. Loosen the belt tension bolt and jam nut and slide the engine toward the flywheel housing to loosen the belt (Figure 25).

    7. Replace drive belt.

    8. Adjust tension of new belt to 8 kg (18 lb) force and 10 mm (0.40 inch) belt deflection at mid-span.

    9. Tighten the 4 engine-plate mounting bolts and the 4 bolts securing the rear of the belt guard to the engine.

    10. Install the belt guard and secure it with the previously removed washers and bolts.

    Grinder Maintenance

    Replacing the Teeth

    Maintenance Service IntervalMaintenance Procedure
    Before each use or daily
  • Check the condition of the teeth; rotate or replace any that are worn or damaged and torque the nuts for all teeth.
    		•

    Due to the high amount of wear placed on the teeth, you need to rotate and replace them periodically (Figure 27). Before you rotate or replace them, inspect each tooth holder on the wheel, including the flat lands that prevent the teeth from rotating. If the tooth holder is damaged, replace the wheel. Torque the nuts 68 N∙m (50 ft-lb) for any teeth that you are not rotating or replacing.

    g034325

    Figure 27

    1. Sharp tooth
    2. Worn tooth

    Each tooth is indexed with 3 positions so you can rotate it twice, exposing a new sharp edge before replacing the tooth. To rotate a tooth, loosen the nut securing the tooth (Figure 28). Push the tooth forward and rotate it 1/3 of a turn, bringing an unused edge to the outside. Torque the nut securing the tooth to 68 N∙m (50 ft-lb).

    To replace a tooth, remove the nut securing the tooth, then install a new tooth, washer, and nut in the same position (Figure 28). Torque the nut securing the tooth to 68 N∙m (50 ft-lb).

    g034223

    Figure 28

    1. Tooth
    2. Tooth holder
    3. Washer
    4. Nut
    5. Flat land

    Cleaning

    Removing Debris from the Machine

    Maintenance Service IntervalMaintenance Procedure
    Before each use or daily
  • Remove debris from the machine.
    		•

    Regular cleaning and washing increases the life span of the machine. Clean the machine directly after use, before the dirt hardens.

    Before cleaning, check that the fuel-tank cap is properly in place to avoid getting water in the tank.

    Use care when using a high-pressure sprayer, because it can damage warning decals, instruction signs, and the engine

    Important: Lubricate the cutting wheel bearings after cleaning.

    Storage

    For storage over 30 days, prepare the machine as follows:

    1. Remove dirt and grime from the external parts of the entire unit, especially the engine. Clean dirt and sawdust chips from the outside of the engine cylinder head fins and blower housing.

      Important: You can wash the unit with mild detergent and water.

    2. Add a petroleum-based stabilizer/conditioner to fuel in the tank. Follow mixing instructions from stabilizer manufacturer. (7.8 ml per L or 1 oz per US gallon).

      Note: Fuel stabilizer/conditioner is most effective when mixed with fresh fuel and used at all times.

      Important: Do not use an alcohol-based stabilizer (ethanol or methanol). Do not store stabilizer/conditioned fuel over 90 days.

    3. Run the engine to distribute conditioned fuel through the fuel system (5 minutes).

    4. Shut off the engine, allow it to cool, and drain the fuel tank using a pump type siphon. Dispose of fuel properly; recycle as per local codes.

    5. Start the engine and run it until it shuts off.

    6. Engage the choke.

    7. Start and run the engine until it does not start again.

    8. Clean the sediment cup; refer to Cleaning the Sediment Cup.

    9. Service the air cleaner; refer to Servicing the Air Cleaner.

    10. Change the engine oil; refer to Changing the Engine Oil.

    11. Remove the spark plug and check the condition; refer to Servicing the Spark Plug.

    12. With the spark plug removed from the engine, pour 2 tablespoons of engine oil into the spark plug hole.

    13. Pull the starter slowly to crank the engine and distribute the oil inside the cylinder.

    14. Install the spark plug, but do not install the wire on the spark plug.

    15. Grease the cutter wheel bearings; refer to Greasing the Machine.

    16. Check and tighten all bolts, nuts, and screws. Repair or replace any part that is damaged.

    17. Paint all scratched or bare metal surfaces. Paint is available from your Authorized Service Dealer.

    18. Store the machine in a clean, dry garage or storage area.

    19. Cover the machine to protect it and keep it clean.

    Troubleshooting

    ProblemPossible CauseCorrective Action
    The engine does not start.
    1. The safety bail is in the Off position.
    2. If your model is equipped with an engine with an On/Off switch, the switch is in the Off position.
    3. The fuel-shutoff valve is closed.
    4. The choke is open.
    5. The fuel tank is empty.
    6. The spark plug wire is loose or disconnected.
    1. Hold the safety bail against the handle.
    2. Move the switch to the On position.
    3. Open the fuel-shutoff valve.
    4. Close the choke when starting a cold engine.
    5. Fill the tank with fresh fuel.
    6. Check the electrode gap and clean or replace the spark plug.
    The engine runs rough.
    1. The choke is closed.
    2. The air filter is clogged.
    3. The fuel line is clogged.
    4. There is water or contaminants in the fuel.
    5. The spark plugs are worn or have buildup on the electrodes.
    1. Open the choke.
    2. Clean or replace the air filter.
    3. Clean the sediment cup.
    4. Drain the fuel tank and fill it with fresh fuel.
    5. Check the electrode gap and clean or replace the spark plug.
    The belt slips or comes off the pulleys.
    1. The belt tension is insufficient.
    1. Adjust the belt tension. Reduce the cutting depth.
    The cutting wheel does not rotate.
    1. The engine speed is insufficient to activate the centrifugal clutch.
    2. The belt tension is insufficient.
    3. The clutch shoes are worn.
    1. Move the throttle to the Engaged position.
    2. Adjust the belt tension.
    3. Replace the clutch.
    The cutting wheel continues to rotate.
    1. The engine speed is excessive.
    2. The belt is off the pulleys or broken.
    3. The clutch springs are weak or broken.
    1. Move the throttle to the Disengaged position.
    2. Replace the drive belt.
    3. Replace the clutch.
    The parking brake does not hold.
    1. The parking brake is out of adjustment.
    2. The brake pads are worn.
    1. Adjust the parking brake.
    2. Replace the brake.