Table of Contents
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Summary of Contents for Toro 39678
- Page 1 Form No. 3436-971 Rev A Commercial Walk-Behind Mower Fixed Deck, T-Bar, Gear Drive with 48in TURBO FORCE ® Cutting Unit Model No. 39678—Serial No. 405457997 and Up *3436-971* A Register at www.Toro.com. Original Instructions (EN)
- Page 2 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 identifies the location of the model and serial numbers on the product.
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Page 3: Table Of Contents
Contents Replacing the Drive Belt ........35 Replacing the Mower Belt ......... 36 Adjusting the Mower Belt Tension ..... 37 Safety ............... 4 Adjusting the PTO-Engagement General Safety........... 4 Linkage ............38 Safety and Instructional Decals ......5 Adjusting the PTO-Safety Switch ...... 39 Product Overview ............. -
Page 4: Safety
Safety This machine has been designed in accordance with ANSI B71.4-2017. General Safety This product is capable of amputating hands and feet and of throwing objects. Always follow all safety instructions to avoid serious personal injury. • Read, understand, and follow the instructions and warnings in this Operator’s Manual and on the machine and attachments before starting the engine. -
Page 5: Safety And Instructional Decals
Safety and Instructional Decals 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. decaloemmarkt Manufacturer's Mark 1. Indicates the blade is identified as a part from the original machine manufacturer. - Page 6 decal98-3296 decal112-8760 98-3296 112-8760 1. Belt routing 2. Engine 1. Thrown object hazard—keep bystanders away. 2. Cutting/dismemberment hazard of hand or foot, mower blade—stay away from moving parts. decal98-4387 98-4387 decal112-9028 1. Warning—wear hearing protection. 112-9028 1. Warning—stay away from moving parts; keep all guards and shields in place.
- Page 7 decal126-1400 126-1400 1. Warning—read the Operator’s Manual for information about attachments; certain attachments can cause you to fall. decal130-8374 130-8374 1. Fast 3. Engine—stop 4. Engine—slow 2. Slow decal133-8062 133-8062 decal131-1180 131-1180 1. Read the Operator's 3. Bagging setting Manual. 2.
- Page 8 decal140-1877 140-1877 1. Warning—read the Operator’s Manual. 5. Cutting/dismemberment hazard of hand or foot, mower blade—stay away from moving parts; keep all guards and shields in place. 2. Warning—all operators should be trained before operating 6. Thrown object hazard—keep bystanders away. the machine.
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Page 9: Product Overview
Controls Product Overview Become familiar with all the controls before you start the engine and operate the machine. Control Panel g213356 Figure 3 1. Side-discharge deflector 5. Fuel tank 2. Mower deck 6. T-bar control 3. Spark plug 7. Handle 4. -
Page 10: Specifications
Blade-Control Lever (Power Specifications Takeoff) Note: Specifications and design are subject to change without notice. Use the blade-control lever in conjunction with the blade-control bail to engage and disengage power to Width with deflector down 161 cm (63-1/2 inches) the mower blades (Figure Length 184 cm (72 inches) -
Page 11: Before Operation
Operation • If you spill fuel, do not attempt to start the engine; avoid creating a source of ignition until the fuel vapors have dissipated. Note: Determine the left and right sides of the • Do not fill containers inside a vehicle or on a truck machine from the normal operating position. -
Page 12: Performing Daily Maintenance
◊ Before leaving the operating position machine. Do not engage in any activity that – Use only accessories and attachments causes distractions; otherwise, injury or property approved by The Toro® Company. damage may occur. • – Be sure of your footing while using this Do not operate the machine while ill, tired, or machine, especially when backing up. -
Page 13: Operating The Parking Brake
• toward you. Stop the blade(s) when crossing If you lose control of the machine, step away from gravel surfaces. the direction of travel of the machine. • – Start the engine carefully according to Always keep the machine in gear when going instructions and with your feet well away from down slopes. -
Page 14: Starting The Engine
Starting the Engine Shutting Off the Engine Connect the spark-plug wires. Important: In an emergency, you can stop the engine immediately by turning the ignition key to Open the fuel valve. the Off position. Disengage the PTO and shift to the N EUTRAL Move the throttle lever to the S position... -
Page 15: Operating The Blade-Control Lever (Pto)
Operating the Using the Safety-Interlock Blade-Control Lever (PTO) System The blade-control lever (PTO) engages and WARNING disengages power to the mower blades. If the safety-interlock switches are Engaging the Mower Blades disconnected or damaged, the machine could operate unexpectedly, causing personal Squeeze the blade-control bail against the upper injury. -
Page 16: Driving The Machine
Driving the Machine Using the Lower Control The throttle control regulates the engine speed (rpm). Move the throttle control to the F position for the This procedure is for driving up a curb. You can do best mowing performance. this while driving forward or backward. WARNING Note: Some curbs do not allow the rear drive tires to... -
Page 17: Stopping The Machine
g001452 Figure 10 1. Lower control 2. Handle bar—engaged g000211 Figure 9 1. Lower control 3. Lower control bar—engaged and the bar—engaged and the Stopping the Machine machine going reverse machine going forward 2. Pull up to assist the machine. CAUTION You or bystanders may be injured if you move Driving Backward up a Curb... -
Page 18: Positioning The Flow Baffle
Position B Use this position when bagging. g012676 Figure 11 1. Slot 2. Nut g012678 Figure 13 Positioning the Flow Baffle The following figures are only recommendations for use. Adjustments vary by grass type, moisture Position C content, and the height of the grass. This is the full open position. -
Page 19: Side Discharging Or Mulching Grass
Side Discharging or Mulching Grass This mower has a hinged grass deflector that disperses clippings to the side and down toward the turf. DANGER Without the grass deflector, discharge cover, or complete grass catcher assembly mounted in place, you and bystanders are exposed to blade contact and thrown debris. - Page 20 g001455 Figure 16 1. Axle-pivot bolt 2. Axle-adjustment bolt g001456 Figure 17 Place a jack under the rear center of the engine 1. Latch pin 3. Spacer (13 mm or 1/2 inch) frame. Raise the rear end of the engine frame 2.
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Page 21: Adjusting The Control Rods
Adjusting the Control Rods With the wheel drive fully engaged, check the gap between the upper control bar and the fixed bar. The gap needs to be approximately 25 to 32 mm (1 to 1-1/4 inches) as shown in Figure Note: The upper control bar and the fixed bar must be parallel in the engaged, relaxed, and... -
Page 22: Height-Of-Cut Chart
Height-of-Cut Chart Number of spacers Number of 1/4-inch blade spacers below the spindle below the caster 13 mm 5 mm Axle (1/2 (3/16 position inch) inch) 32 mm (1-1/4 38 mm (1-1/2 45 mm (1-3/4 26 mm (1 inch) 51 mm (2 inches) inches) inches) inches) -
Page 23: After Operation
After Operation After Operation Safety General Safety • Always shut off the machine, remove the ignition key (if equipped), wait for all moving parts to stop, and allow the machine to cool before adjusting, servicing, cleaning, or storing it. • Clean grass and debris from the machine to help prevent fires. -
Page 24: Maintenance
Carefully release pressure from components with stored energy. • To ensure safe, optimal performance of the machine, use only genuine Toro replacement parts. Replacement parts made by other manufacturers could be dangerous, and such use could void the product warranty. -
Page 25: Recommended Maintenance Schedule(S)
Recommended Maintenance Schedule(s) Maintenance Service Maintenance Procedure Interval • Change the engine oil. After the first 8 hours • Check the mower belt tension. • Check the mower belt tension. After the first 25 hours • Check the safety-interlock system. •... -
Page 26: Lubrication
Lubrication Greasing the Transmission Couplers Greasing the Machine Lubricate the transmission couplers and idler-arm pivots located at the rear of the machine (Figure 21). Grease the machine more often in dirty or dusty conditions. Grease Type: No. 2 lithium or molybdenum grease Park the machine on a level surface, disengage the blade-control switch (PTO), and engage the parking brake. -
Page 27: Engine Maintenance
Engine Maintenance Engine Safety • Do not change the governor speed or overspeed the engine. • Run the engine dry or remove the fuel with a hand pump; never siphon the fuel. If you must drain the fuel tank, do it outdoors. Servicing the Air Cleaner Service Interval: Every 25 hours—Clean the foam air-cleaner element. -
Page 28: Servicing The Engine Oil
Servicing the Engine Oil Note: Change the oil more frequently when the operating conditions are extremely dusty or sandy. Engine-Oil Specifications Engine-Oil Type: Detergent oil (API service SF, SG, SH, SJ, or SL) Crankcase Capacity: 1.7 L (58 oz) with the filter g001464 removed;... - Page 29 Install the replacement oil filter to the filter adapter, turn the oil filter clockwise until the rubber gasket contacts the filter adapter, and tighten the filter an additional 3/4 turn (Figure 27). Fill the crankcase with the proper type of new oil. Run the engine for approximately 3 minutes, shut off the engine, and check for oil leaks around the oil filter and drain valve.
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Page 30: Servicing The Spark Plugs
Servicing the Spark Plugs Checking the Spark Plugs Look at the center of the spark plugs (Figure 29). Service Interval: Every 100 hours/Yearly (whichever comes first) Replace the spark plugs Note: If you see light brown or gray on the if necessary. -
Page 31: Fuel System Maintenance
Fuel System Maintenance 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. Refer to Fuel Safety (page 11) for a complete list of fuel related precautions. g005243 Figure 30 Servicing the Fuel System... -
Page 32: Drive System Maintenance
Drive System Install a new filter and move the hose clamps close to the filter. Maintenance Open the fuel-shutoff valve at the fuel tank (Figure 30). Check for fuel leaks and repair, if needed. Checking the Tire Pressure Wipe up any spilled fuel. Service Interval: Every 50 hours/Monthly (whichever comes first) Servicing the Fuel-Vent System... -
Page 33: Cooling System Maintenance
Cooling System Maintenance Cleaning the Air-Intake Screen Remove any buildup of grass, dirt, or other debris from the cylinder and cylinder head cooling fins, the air-intake screen on the flywheel end, and the carburetor-governor levers and linkage. This helps ensure adequate cooling and correct engine speed to reduce the possibility of overheating or mechanical damage to the engine. -
Page 34: Brake Maintenance
Brake Maintenance Check the brake before you adjust it; refer to Checking the Parking Brake (page 34). Disengage the parking brake. Servicing the Parking Brake To adjust the brake, rotate the wing nuts on the brake rods (Figure 35). Check the brakes on both a level surface and a slope. Turn the wing nuts clockwise to tighten the brake Always engage the parking brake when you stop the and counterclockwise to loosen the brake. -
Page 35: Belt Maintenance
Belt Maintenance Inspecting the Belts Service Interval: Every 25 hours—Check the belts for wear or cracks. Replace the belt if it is worn. The signs of a worn belt include squealing while the belt is rotating; the blades slipping while cutting grass; and frayed edges, burn marks, and cracks on the belt. -
Page 36: Replacing The Mower Belt
Install the mower belt (Figure 37). Check the belt guide under the engine frame for the proper adjustment (Figure 37). Note: The distance between the belt guide and mower belt should be 19 mm (3/4 inch) when you engage the mower belt. Adjust the belt, if necessary. -
Page 37: Adjusting The Mower Belt Tension
Note: The distance between the belt guide and mower belt should be 32 mm (1-1/4 inches) when you engage the mower belt. Adjust the mower belt as necessary. The disengaged belt should not drag or fall off the pulley when the guides are properly adjusted. -
Page 38: Adjusting The Pto-Engagement Linkage
13 mm (1/2 inch) halfway between the pulleys (Figure 41). If there is no adjustment remaining in the turnbuckle and the belt is still loose, the rear idler pulley needs to be positioned to the middle or front hole (Figure 42). -
Page 39: Adjusting The Pto-Safety Switch
Loosen the nut against the yoke (Figure 44). Remove the assist-arm link from the assist arm and rotate the link to adjust the length. Install the assist-arm link into the assist arm and secure it with the hairpin cotter (Figure 45). -
Page 40: Mower Deck Maintenance
Mower Deck Maintenance Blade Safety A worn or damaged blade can break and a piece could be thrown toward you or bystanders, resulting in serious personal injury or death. g006530 Figure 47 • Inspect the blades periodically for excessive wear 1. - Page 41 Replace the blades if you hit a solid object or if the blades are out of balance or bent. To ensure optimum performance and continued safety conformance of the machine, use genuine Toro replacement blades. Replacement blades made by other manufacturers g001454 may result in non-conformance with safety standards.
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Page 42: Adjusting The Blade Brake
Adjusting the Blade Brake Note: If the blade is not balanced, file some metal off the end of the sail area only (Figure 52). Park the machine on a level surface, disengage the PTO, and engage the parking brake. Shut off the engine, remove the key, and disconnect the spark-plug wires from the spark plugs. -
Page 43: Replacing The Grass Deflector
Replacing the Grass Place one J-hook end of the spring around the grass deflector (Figure 55). Deflector Important: The grass deflector must be able to rotate. Lift the deflector up to the WARNING fully-open position and ensure that it rotates into the fully-down position. -
Page 44: Cleaning
Cleaning Cleaning under the Mower Service Interval: Before each use or daily Remove the grass buildup under the mower daily. Park the machine on a level surface, disengage the PTO, and engage the parking brake. Shut off the engine, remove the key, and disconnect the spark-plug wires from the spark plugs. -
Page 45: Storage
Storage Add fuel stabilizer/conditioner to fresh fuel in the tank. Follow mixing instructions from the fuel stabilizer manufacturer. Do not Storage Safety use an alcohol-based stabilizer (ethanol or methanol). • Always shut off the machine, remove the ignition Run the engine to distribute conditioned fuel key, wait for all moving parts to stop, and allow through the fuel system for 5 minutes. -
Page 46: Troubleshooting
Troubleshooting Problem Possible Cause Corrective Action The fuel tank is showing signs of collapsing 1. The air-cleaner paper element clogged. 1. Clean the paper element. or the machine is frequently showing signs of running out of fuel. The engine overheats. 1. - Page 47 Problem Possible Cause Corrective Action The machine vibrates abnormally. 1. The cutting blade(s) is/are bent or 1. Install new cutting blade(s). unbalanced. 2. The blade mounting bolt is loose. 2. Tighten the blade mounting bolt. 3. The engine mounting bolts are loose. 3.
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Page 48: Schematics
Schematics g001471 Electrical Schematic (Rev. -A) - Page 49 Notes:...
- Page 50 Notes:...
- Page 51 While the exposure from Toro products may be negligible or well within the “no significant risk” range, out of an abundance of caution, Toro has elected to provide the Prop 65 warnings. Moreover, if Toro does not provide these warnings, it could be sued by the State of California or by private parties seeking to enforce Prop 65 and subject to substantial penalties.