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Form No. 3420-243 Rev B Commercial Walk-Behind Traction Unit 18HP Pistol-Grip Hydro Drive Model No. 31914—Serial No. 400000000 and Up *3420-243* B Register at www.Toro.com. Original Instructions (EN)
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You are responsible for operating the product properly and safely. You may contact Toro directly for product safety and operation training materials, accessory information, help finding a dealer, or to register your product...
Servicing the Spark Plug........25 Fuel System Maintenance ........26 Servicing the Fuel Tank........26 g000502 Servicing the Fuel Filter ........27 Figure 3 Drive System Maintenance ........28 Adjusting the Speed-Control Linkage....28 1. Safety-alert symbol Adjusting the Neutral Control Linkages ..... 29 Adjusting the Hydraulic Control This manual uses 2 words to highlight information.
Safe Handling of Fuels Safety • Use extra care when handling fuel. They are flammable and vapors are explosive. Improper use or maintenance by the operator or owner • Extinguish all cigarettes, cigars, pipes, and other can result in injury. To reduce the potential for injury, sources of ignition.
• Keep your hands and feet away from the cutting engine, and remove the key or disconnect unit. spark-plug wire. Wait for all movement to stop before adjusting, cleaning, or repairing. • Look behind and down before backing up to ensure a clear path.
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decal40-13-010 40-13–010 1. Cutting hazard of hand 2. Cutting hazard of foot decal106-2733 106-2733 1. Fast 3. Slow 2. Continuous variable setting decal95-5537(hydro) 95-5537 1. Read the Operator's 3. Pull back to disengage Manual for instructions on operating the cutting blade decal115-1039 115-1039 2.
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decal130-8375 130-8375 1. Read the Operator's 4. Increase right Manual. 2. Increase left 5. Tracking adjustment knob 3. Tracking adjustment decal130-8370 130-8370 1. Neutral lock decal119-6672 119-6672 1. Forward 10. Warning—read the Operator's Manual. 2. Neutral 11. Warning—do not operate this machine unless you are trained. 3.
Setup Loose Parts Use the chart below to verify that all parts have been shipped. Procedure Description Qty. – No parts required Check the fluids and tire pressure. Wheel Kit (sold separately) Install the Wheel Kit. Operator's Manual Read the Operator's Manual and watch Engine owner’s manual the operator training material before Operator training material...
Contact your Authorized Service Dealer or Distributor or go to Choke Control www.Toro.com for a list of all approved attachments and accessories. Use the choke control to start a cold engine. To ensure optimum performance and continued safety certification of the machine, use only genuine Toro replacement parts and accessories.
Recommended Fuel Operation • For best results, use only clean, fresh (less than 30 days old), unleaded gasoline with an octane Adding Fuel rating of 87 or higher ((R+M)/2 rating method). • Ethanol: Gasoline with up to 10% ethanol Fuel Safety (gasohol) or 15% MTBE (methyl tertiary butyl ether) by volume is acceptable.
Think Safety First Disengaging the Parking Brake Carefully read all the safety instructions and decals in the safety section. Knowing this information could help you or any bystanders avoid injury. CAUTION This machine produces sound levels in excess of 85 dBA at the operator's ear and can cause hearing loss through extended periods of exposure.
Shutting Off the Engine Place your thumbs on the upper part of the locks and move them back until the pins are in the Important: position (Figure 10). In an emergency, you can shut off EUTRAL the engine immediately by turning the key to the position.
Operating the Using the Safety-Interlock Blade-Control Knob (PTO) System The blade-control knob (PTO) is used in conjunction CAUTION with the operator-presence control (OPC) levers to engage and disengage the mower blades. If safety-interlock switches are disconnected or damaged the machine could operate Engaging the Mower Blades (PTO) unexpectedly causing personal injury.
Engage the neutral locks and move the speed-control lever to the N position. EUTRAL Start the engine; refer to Starting the Engine (page 12). Without holding the operator-presence control (OPC) levers, pull the blade-control knob (PTO) up. The engine should shut off. Disengage the blade-control knob (PTO).
Open the bypass valves by turning them counter height of cut. Refer to Height-of-Cut Chart (page 19) clockwise 1 to 2 times (Figure 14). to select the combination of adjustments required. Note: This allows hydraulic fluid to bypass the Adjusting the Blade Height pumps and the wheels to turn.
Adjusting the Caster Install the bolt, curved washer, blade, add extra spacers, and secure them with a thin washer Position and a nut (Figure 15). Torque the blade bolt to 101 to 108 N∙m (75 to Adjust the caster spacers to match with the axle 80 ft-lb).
Adjusting the Handle Height The handle position can be adjusted to match your height preference. Remove the hairpin cotters and clevis pins from the drive levers and neutral locks (Figure 18). g001734 Figure 19 1. Control rod fitting 6. High position 2.
Height-of-Cut Chart Number of spacers Number of 6 mm (1/4 inch) blade spacers below spindle below caster Axle Position 13 mm 5 mm (1/2 inch) (3/16 inch) 26 mm 32 mm 38 mm 45 mm 51 mm (1 inch) (1-1/4 inch) (1-1/2 inch) (1-3/4 inch) (2 inch)
Maintenance Note: Determine the left and right sides of the machine from the normal operating position. Recommended Maintenance Schedule(s) Maintenance Service Maintenance Procedure Interval • Change the engine oil. • Check the mower belt tension. After the first 8 hours •...
Lubrication Greasing the Pump Control and Bell Crank Figure 20 for locating the grease points on the machine. Service Interval: Every 50 hours—Grease the Grease type: No. 2 lithium or molybdenum grease pump-drive idler pivot. Park the machine on a level surface, disengage Every 50 hours—Grease the pump control.
Engine Maintenance Cleaning the Foam Air-Cleaner Element Servicing the Air Cleaner Wash the foam element in liquid soap and warm water. When the element is clean, rinse Service Interval: Every 25 hours (more often in dirty it thoroughly. or dusty conditions). Dry the element by squeezing it in a clean cloth.
Servicing the Engine Oil Engine Oil Specifications Oil Capacity: with a filter change—1.7 L (57 fl oz); without a filter change—1.5 L (51 fl oz) Viscosity: See the table below. g017470 Figure 22 Checking the Engine-Oil Level Service Interval: Before each use or daily Note: Check the oil when the engine is cold.
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g194610 Figure 25 Dispose of the used oil at a recycling center. g027476 Figure 24 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 25).
Changing the Engine-Oil Filter Servicing the Spark Plug Service Interval: Every 200 hours—Change the Service Interval: Every 100 hours engine-oil filter (more often in dirty Ensure that the air gap between the center and side or dusty conditions). electrodes is correct before installing the spark plug. Drain the oil from the engine;...
Checking the Spark Plug Fuel System Important: Do not clean the spark plug(s). Maintenance Always replace the spark plug(s) when it has a black coating, worn electrodes, an oily film, or cracks. Servicing the Fuel Tank If you see light brown or gray on the insulator, the engine is operating properly.
g001467 Figure 30 1. Fuel-shutoff valve 2. Fuel filter g001468 Figure 31 1. Hose clamp 3. Filter Servicing the Fuel Filter 2. Fuel line Remove the filter from the fuel lines. Replacing the Fuel Filter Install a new filter and move the hose clamps Service Interval: Every 200 hours/Yearly (whichever close to the filter.
Drive System Check to make sure that the safety switch is pressed and there is a 8 mm (5/16 inch) space Maintenance between the actuating tab and the switch (Figure 33). Perform the following linkage adjustments, Adjusting If needed, adjust switch location to create the the Speed-Control Linkage (page 28) through 8 mm (5/16 inch) space...
Adjusting the Neutral Squeeze 1 drive lever until you feel an increased resistance. This is the N position. EUTRAL Control Linkages Note: Make sure that you have not reached the end of the neutral lock slot. If you have, shorten the control lever linkage.
Adjusting the Hydraulic Loosen the front adjusting nut on left hydraulic control linkage as shown in Figure Control Linkages Turn the left rear adjusting nut counter-clockwise until wheel rotates forward (Figure 36). WARNING Turn the rear adjusting nut clockwise 1/4 turn at a time.
position. Repeat this until right wheel EUTRAL stops rotating forward (Figure 38). Hold the OPC levers down. Note: Hold the OPC levers down whenever the speed-control lever is out of the N EUTRAL position or the engine will shut off. The spring that keeps tension on the knob should normally not need adjustment.
Adjusting the Control Rod Adjust the rod length by releasing the drive lever and removing the hairpin cotter and clevis pin. Rotate the rod in the rod fitting (Figure 39). Lengthen the control rod if the tire is turning in reverse and shorten the rod if the tire is turning forward.
Cooling System Park the machine on a level surface, disengage the PTO, and engage the parking brake. Maintenance Shut off the engine, remove the key, and wait for all moving parts to stop before leaving the operating position. Cleaning the Air Intake For a heavier drive setting, relocate the spring anchor links to either the medium or heavy duty Screen...
Brake Maintenance Servicing the Brake Before each use, check the parking brake for proper operation. Always engage the parking brake when you stop the machine or leave it unattended. If the parking brake does not hold securely, adjust it. Checking the Parking Brake g001513 Service Interval: Before each use or daily Figure 44...
Belt Maintenance Checking the Belts Service Interval: Every 50 hours/Monthly (whichever comes first) Check the belts for squealing when the belt is rotating, blades slipping when cutting grass, frayed belt edges, burn marks and cracks are signs of a worn mower belt.
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Rotate the turnbuckle toward the front of the mower deck to decrease the tension on the belt (Figure 46). Note: Ensure that the eyebolt threads on both ends of the turnbuckle are engaged a minimum of 8 mm (5/16 inch). g001848 Figure 47 1.
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Shut off the engine, remove the key, and wait for all moving parts to stop before leaving the operating position. Engage the PTO. Adjust the linkage length to where the lower end of the bellcrank just clears the axle support gusset (Figure 49).
Hydraulic System Maintenance Servicing the Hydraulic System WARNING Hydraulic fluid escaping under pressure can penetrate skin and cause injury. • If hydraulic fluid is injected into the skin it must be surgically removed within a few hours by a doctor familiar with this type of g001855 Figure 51 injury.
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Wait for all moving parts to stop before leaving Locate filter under engine base and place drain the operating position and then engage the pan under filter (Figure 53). parking brake. Remove the old filter and wipe the filter adapter Clean area around cap and filler neck of gasket surface clean (Figure...
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critical area for purging air from the hydraulic system Lift the charge pump housing upward and is between the oil reservoir and each charge pump wait for a steady flow of fluid to flow out from located on the top of each variable displacement under the housing.
Mower Deck Maintenance Servicing the Cutting Blades For Rear-Discharge Decks g006530 Figure 55 Note: For the Flail Attachment, refer to the Operator’s 1. Cutting edge 3. Wear/slot forming Manual for the cutting unit. 2. Curved area 4. Crack To ensure a superior quality of cut, keep the blades sharp.
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To ensure optimum performance and continued safety conformance of Note: Maintain the original angle. the machine, use genuine Toro replacement blades. Replacement blades made by other manufacturers Note: The blade retains its balance if the same may result in non-conformance with safety standards.
Adjusting the Blade Brake Storage Park the machine on a level surface, disengage Park the machine on a level surface, disengage the PTO, and engage the parking brake. the PTO, and engage the parking brake. Shut off the engine, remove the key, and wait Shut off the engine, remove the key, and wait for all moving parts to stop before leaving the for all moving parts to stop before leaving the...
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into the spark plug hole. Now use the starter to crank the engine and distribute the oil inside the cylinder. Install the spark plug(s). Do not install the spark plug wires onto the spark plug(s). Check and tighten all bolts, nuts, and screws. Repair or replace any part that is damaged or worn.
Troubleshooting Problem Possible Cause Corrective Action The engine does not start, starts hard, or 1. The fuel tank is empty. 1. Fill the fuel tank with fuel. fails to keep running. 2. The fuel-shutoff valve is closed. 2. Open the fuel-shutoff valve. 3.
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Problem Possible Cause Corrective Action The blades do not rotate. 1. The mower deck belt is worn or loose. 1. Check the belt tension. 2. The mower deck belt is broken. 2. Install a new deck belt. 3. The mower deck belt is off a pulley. 3.
Schematics g016112 Electrical Schematic (Rev. A) g001544 Hydraulic Schematic (Rev. A)
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