FORM NO. 3321–134 ProLine Brushcutter Model No. 53020 — 8900001 & Up Model No. 53021 — 8900001 & Up 16” & 18” Gas Modèle No. 51903 — 790000001 et suivants Modèle No. 51904 — 790000001 et suivants Modèle No. 51906 — 790000001 et suivants Modèle No. 51907 — 790000001 et suivants 16” & 18” Gas Modelos N. 51903 — 790000001 y siguientes Modelos N. 51904 — 790000001 y siguientes Modelos N. 51906 — 790000001 y siguientes Modelos N.
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 9. Model and Serial Number Decal (on rear of engine stand) 10. Brushcutter Blade 11. Blade Shield 12. Strap 13. Throttle Cable and Stop Switch Wires 14. Fuel Tank 15. Air Filter 1. Gearcase 2. Shaft Assembly 3. Throttle Trigger and Stop Switch 4. Bullhorn Handle 5. Shoulder Harness Attachment 6. Shaft Grip 7. Clutch Drum Housing 8. Engine 1. 50 ft. (15 m) Minimum 4 2 1. Engine 2. M5 x 20 Screw (4) 3. Shaft 4.
5 7 1. Throttle Trigger/Stop Switch 2. Stop Switch Wires/Throttle Cable 3. Clamp Bracket 4. Screw (4) 5. Bullhorn Handle (2) 1. 2. 3. 4. 5. 6. 7. 8. Throttle Cable Housing Cable Adjuster Sleeve Locknut Throttle Cable Slotted Fitting Recessed Hole Cable Lug Carburetor Bracket 6 8 1. Air Cleaner Cover 2. Cylinder Cover ii 3. Knob 1. Cable Adjuster Sleeve 2. Carburetor Throttle Cam 3.
9 11 1. Gearcase 2. Blade Shield 3. M5 x 12 Screw (4) 1. Red Band 2. Strap 10 3. Ring 12 1. 2. 3. 4. 5. Gearcase 3mm Hex Wrench Splined Shaft Boss Adapter Edger Blade (eight-tooth) 6. Clamping Washer 7. Stabilizer 8. Blade Bolt (left-hand thread) 1. Brushcutter Blade 2. Groove 3. Blade Cover 4.
13 15 1. Primer Bulb 14 2. Fuel Return Line 1. Stop Switch 2. Fast-idle Lock 3. Throttle Trigger (in fast-idle start position) 16 1. Starter Handle iv 4. Throttle Trigger (in idle position) 2. Choke Lever (typical) 1.
17 1 20 1 3 2 2 1 4 CORRECT 1. No Kick-back Zone 2. Direction of Swing 18 1. Filter Screen 2. Cutout (typical) 2 3. Air Filter Cover 4. Plastic Post (typical) 1 21 INCORRECT 19 2 3 1. Wire 2. Fuel Pick-up Hose 3 1. Air Filter Cover 2. Filter Screen 2 1. Direction of Swing 2. DANGER – Kick-back Zone 1 1 3. Fuel Filter 3.
22 24 ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ 1. 0.118“ (3mm) 1. .024”–.028” (0.6–0.7 mm) 25 23 1. Socket Head Screw (5) 2. Tail 3. Gasket vi 4. Spark Arrester 5. Muffler Cover 6. Muffler Body 1. 0.079”–0.118” (2–3mm) 2. 0.275”–0.315” (7–8mm) 3. 0.394” (10mm) 4. 0.059”–0.098” (1.5–2.
26 28 1. Four-tooth Blade 2. Eight-tooth Blade 1. 1.4–1.7 Times Original Blade Thickness 2. 40° 3. 80° 3. 80-tooth Blade 4. Blade Thickness 5. 0.039”–0.059” (1–1.5mm) Radius 6.
Contents Page Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operator Safety . . . . . . . . . . . . . . . . . . . . . Brushcutter Safety . . . . . . . . . . . . . . . . . . . Fuel Safety . . . . . . . . . . . . . . . . . . . . . . . . . Power Brushcutter Operating Safety . . . . . Safety and Instruction Decals . . . . . . . . . . Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Although Toro designs, produces and markets safe, state-of-the-art products, you are responsible for using the product properly and safely. You are also responsible for training persons who you allow to use the product about safe operation. 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.
2. Inspect the Brushcutter before each use. Replace damaged parts. Check for fuel leaks. Make sure all fasteners are in place and tightened securely. Follow the maintenance instructions beginning on page 12. 4. Do not overfill the fuel tank. Stop filling 1/4–1/2 inch (6mm–13mm) from the top of the tank. 5. Wipe up any spilled fuel before starting the engine. 3. Make sure the Brushcutter blade does not rotate at engine idle speed. Refer to Idle Speed Adjustment, page 10. 6.
7. Never operate the Brushcutter without proper guards or other protective safety devices in place. 8. Do not put hands or feet near or under any rotating parts. Keep clear at all times. Keep all parts of your body away from the rotating Brushcutter blade and hot surfaces such as the muffler. 9. When cutting heavy brush or small trees, always swing the Brushcutter from right to left to prevent kick-back (Figs 17 and 18). 10. Keep firm footing and balance. Do not overreach. 11.
Assembly Assembling Engine and Drive Shaft Assembly The drive shaft, clutch drum housing and gearcase are assembled. Attach the clutch drum housing to the engine using the four M6 x 20 screws supplied with the unit (Fig. 4). 2. Position the slotted fitting on the carburetor so the recessed hole for the cable lug is away from the cable adjuster sleeve (Fig. 7). 3.
Installing Brushcutter Blade 6. Remove the 3mm hex wrench from the boss adapter and gearcase (Fig. 10). Attaching Strap POTENTIAL HAZARD • If the Brushcutter blade is not adequately tightened, it can come loose from the Brushcutter during use. POTENTIAL HAZARD • Without the strap installed on the Brushcutter, the blade can produce side thrust which can expose the operator and bystanders to blade contact. WHAT CAN HAPPEN • This may cause damage to property or personal injury.
2. Wind the cover around the blade, then snap the hook to secure the blade cover (Fig. 12). POTENTIAL HAZARD • Gasoline contains gasses that can build up pressure inside a gas tank. Before Operation WHAT CAN HAPPEN • Fuel can be sprayed on you when removing gas cap. Oil and Fuel HOW TO AVOID THE HAZARD • Remove fuel cap slowly to avoid injury from fuel spray. POTENTIAL HAZARD • In certain conditions gasoline is extremely flammable and highly explosive.
Recommended Fuel Type Use clean, fresh lead-free gasoline, including oxygenated or reformulated gasoline, with an octane rating of 85 or higher. To ensure freshness, purchase only the quantity of gasoline that can be used in 30 days. Use of lead-free gasoline results in fewer combustion chamber deposits and longer spark plug life. Use of premium grade fuel is not necessary or recommended.
Mixing Instructions IMPORTANT: Never mix gasoline and oil directly in the Brushcutter fuel tank. Starting And Stopping Before Starting The Engine 1. Fill the fuel tank as instructed in the Before Operation section of this manual. Always mix fuel and oil in a clean container approved for gasoline. 2. Rest the Brushcutter on the ground. 3. Make sure the Brushcutter blade is clear of any broken glass, nails, wire, rocks or other debris. 2.
Hot Restart To start an engine that is already warmed up (hot restart), or if the ambient temperature exceeds 68_F (20_C): 1. 2. POTENTIAL HAZARD • Engine must be running to make some carburetor adjustments. • When engine is running, Brushcutter blade is rotating and other parts are moving. Pump the primer bulb at the bottom of the carburetor until fuel can be seen flowing through the fuel return line to the fuel tank (Fig. 13).
Operation POTENTIAL HAZARD • Without the strap installed, the Brushcutter blade can produce side thrust which can expose the operator and bystanders to blade contact. • If the Brushcutter is not correctly positioned on the operator’s right side, the blade can produce side thrust which can expose the operator and bystanders to blade contact. POTENTIAL HAZARD • Foreign objects can be thrown by Brushcutter. WHAT CAN HAPPEN • Contact with thrown objects can cause personal injury.
• If the Brushcutter blade becomes jammed, stop the engine immediately. • Make certain all moving parts have stopped and disconnect the spark plug before inspecting the equipment for damage. • Never use a Brushcutter that has chipped, cracked or broken blade or blade shield. 4. Maintenance NOTICE: IMPORTANT: To detach the strap quickly from the Brushcutter, pull upward on the red band (Fig. 11).
screen fit onto the matching plastic posts in the air filter cover. The fit should be snug (Fig. 20). 6. Reinstall the air filter cover and tighten the knob (Fig. 19). Spark Plug Maintenance Interval • The spark plug should be removed from the engine and checked after each 25 hours of operation. • Replace the spark plug after every 100 hours of operation. Fuel Filter Maintenance Interval Spark Plug Maintenance 1.
Air must flow freely around and through the cylinder cooling fins to prevent engine overheating. Leaves, grass, dirt and debris buildup on the fins will increase the operating temperature of the engine, which can reduce engine performance and shorten engine life. Spark Arrester Maintenance 1. With the engine at ambient (room) temperature, loosen the knob and remove the air cleaner cover (Fig. 6). 2. Loosen the knob and lift off the cylinder cover (Fig. 6). 3.
IMPORTANT: Be careful not to allow any dirt or debris to fall into the exhaust ports, as this can cause engine damage. 6. To reassemble the muffler cover to the muffler: A. Apply liquid gasket (p/n M261910) to the muffler cover sealing surfaces, then reinstall the cover onto the muffler body (Fig. 23). B. The Toro Brushcutter will provide maximum performance for many, many hours if it is maintained properly.
4. Perform all regular maintenance procedures and any needed repairs. 5. Remove the spark plug and squirt a very small amount of oil into the cylinder. 2. String Trimmer Conversion Kit, Model No. 53051—allows you to convert the Brushcutter to a String Trimmer. POTENTIAL HAZARD • If the Brushcutter blade is not adequately tightened, it can come loose from the Brushcutter during use. POTENTIAL HAZARD • Oil may squirt out of the spark plug opening when you pull the starter handle.
Troubleshooting Problem Cause Engine Will Not Start Engine Will Not Idle Action STOP switch set to off position Empty fuel tank Move switch to on position Fill fuel tank Primer bulb wasn’t pushed enough Press primer bulb until fuel flows through fuel return line Engine flooded Use warm engine starting procedure Idle speed set incorrectly Set idle speed Engine Lacks Power or Stalls When Throttle wire has come loose C tting Cutting Dirty air filter Tighten throttle wire Clean or replace air filt
Federal and California Emission Control Warranty Statement A Two Year Limited Warranty Your Warranty Rights and Obligations The U.S. Environmental Protection Agency (EPA), the California Air Resources Board (CARB) and Toro are pleased to explain the emission control system warranty on your 1995 and later utility/lawn/garden equipment engine. In California, new utility/lawn/garden equipment engines must be designed, built and equipped to meet the State’s stringent anti–smog standards.
Failures caused by abuse, neglect, or improper maintenance are not covered. The use of add–on or modified parts can be grounds for disallowing a warranty claim. The manufacturer is not liable to cover failures of warranted parts caused by the use of add–on or modified parts. Toro is liable for damages to other engine components caused by the failure of a warranted part still under warranty.
warranty validation. The owner shall not be charged for diagnostic labor which leads to the determination that a warranted part is defective, if the diagnostic work is performed at a warranty station. The Toro Company is not liable for indirect, incidental or consequential damages in connection with the use of the TORO Products covered by this warranty, except for damages to other engine components caused by the failure of a warranted part still under warranty.
THE TORO TOTAL COVERAGE GUARANTEE A OneĆYear Limited Warranty (A TwoĆYear Full Warranty for Residential Use) LCG What Is Covered By This Express Warranty? The Toro Company promises to repair any TORO Product used for commercial, institutional, or rental purposes if defective in materials or workmanship for a period of one year from the date of purchase. The cost of parts and labor are included, but the customer pays the transportation cost.