Toro 74923 Operator's Manual
Riding mower with 52in turbo force side discharge mower
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Summary of Contents for Toro 74923
- Page 1 Form No. 3408-484 Rev C Z Master ® Professional 6000 Series Riding Mower with 52in TURBO FORCE ® Side Discharge Mower Model No. 74923—Serial No. 400000000 and Up Model No. 78924—Serial No. 400000000 and Up *3408-484* C 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 Servicing the Engine Oil........39 Servicing the Spark Plug........42 Checking the Spark Arrester ......43 Safety ............... 4 Fuel System Maintenance ........44 General Safety ........... 4 Replacing the Fuel Filter ........44 Slope Indicator ........... 5 Servicing the Fuel Tank........44 Safety and Instructional Decals ...... -
Page 4: Safety
Safety This machine has been designed in accordance with ANSI B71.4-2012. 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. Using this product for purposes other than its intended use could prove dangerous to you and bystanders. -
Page 5: Slope Indicator
Slope Indicator g011841 Figure 3 This page may be copied for personal use. 1. The maximum slope you can safely operate the machine on is 15 degrees. Use the slope chart to determine the degree of slope of hills before operating. Do not operate this machine on a slope greater than 15 degrees. Fold along the appropriate line to match the recommended slope. -
Page 6: 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. decal58-6520 58-6520 decal106-2655 1. Grease 106–2655 1. Warning-do not touch or approach moving belts; remove the ignition key and read the instructions before servicing or performing maintenance. - Page 7 decal110-2068 110-2068 1. Read the Operator's Manual. decal112-9028 112-9028 1. Warning—stay away from moving parts; keep all guards in place. decal107-3069 107-3069 1. Warning–there is no rollover protection when the roll bar is down. decal114-4466 2. To avoid injury or death from a rollover accident, keep the 114-4466 roll bar in the fully raised and locked position and wear the seat belt.
- Page 8 decal116-1716 116-1716 1. Fuel 6. Hour meter 2. Empty 7. PTO 3. Half 8. Parking brake 4. Full 9. Neutral 5. Battery 10. Operator-presence switch decal117-0346 117-0346 1. Fuel leak hazard—read the Operator's Manual; do not attempt to remove the roll bar; do not weld, drill, or modify decal116-4858 116-4858 the roll bar in any way.
- Page 9 decal117-3864 117-3864 1. Read the Operator’s 2. Fill to bottom of filler neck; Manual. warning—do not overfill the tank. decal126-4398 126-4398 1. Read the Operator’s 3. Unlock manual 2. Lock decal120-5898 120-5898 1. Choke 4. Slow 2. Fast 5. Power takeoff (PTO), Blade-control switch 3.
- Page 10 decalbatterysymbols Battery Symbols Some or all of these symbols are on your battery 1. Explosion hazard 6. Keep bystanders a safe distance away from the battery. 2. No fire, open flame, or 7. Wear eye protection; smoking explosive gases can cause blindness and other injuries.
- Page 11 decal132-0871 132-0871 Note: This machine complies with the industry standard stability test in the static lateral and longitudinal tests with the maximum recommended slope indicated on the decal. Review the instructions for operating the machine on slopes in the Operator’s Manual as well as the conditions in which you would operate the machine to determine whether you can operate the machine in those conditions on that day and at that site.
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Page 12: Product Overview
Hour Meter Product Overview The hour meter records the number of hours the engine has operated. It operates when the engine is running. Use these times for scheduling regular maintenance (Figure Fuel Gauge The fuel gauge is located with the hour meter, and the bars light up when the ignition switch is in the O position (Figure... -
Page 13: Specifications
S , and O TART Authorized Service Dealer or Distributor or go to www.Toro.com for a list of all approved attachments Motion-Control Levers and accessories. Use the motion-control levers to drive the machine forward, reverse, and turn either direction. -
Page 14: Before Operation
Operation containers on the ground, away from your vehicle before filling. • Remove the equipment from the truck or trailer Note: Determine the left and right sides of the and refuel it while it is on the ground. If this is not machine from the normal operating position. -
Page 15: Using Stabilizer/Conditioner
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 •... -
Page 16: Checking The Engine-Oil Level
Checking the Engine-Oil Lower the roll bar to the down position (Figure Level Before you start the engine and use the machine, check the oil level in the engine crankcase; refer to Checking the Engine-Oil Level (page 16). Breaking in a New Machine New engines take time to develop full power. -
Page 17: Think Safety First
Think Safety First CAUTION This machine produces sound levels in Please read all safety instructions and symbols in the safety section. Knowing this information could help excess of 85 dBA at the operator’s ear and you or bystanders avoid injury. can cause hearing loss through extended periods of exposure. -
Page 18: Positioning The Seat
to the N position. Try starting the EUTRAL LOCK engine; the engine should not start. Positioning the Seat The seat moves forward and backward. Position the seat where you have the best control of the machine and are most comfortable. To adjust, move the lever sideways to unlock the seat (Figure 12). -
Page 19: Changing The Seat Suspension
Do not operate the machine while ill, tired, or • under the influence of alcohol or drugs. Use accessories and attachments approved by Toro only. • Never carry passengers on the machine and keep bystanders and pets away from the machine Rollover Protection System during operation. -
Page 20: Operating The Parking Brake
Disengaging the Parking Brake • Keep the roll bar in safe operating condition by thoroughly inspecting it periodically for damage and keeping all the mounting fasteners tight. • Replace a damaged roll bar. Do not repair or alter Slope Safety •... -
Page 21: Operating The Mower Blade-Control Switch (Pto)
Operating the Mower Blade-Control Switch (PTO) The blade-control switch (PTO) starts and stops the mower blades and any powered attachments. Engaging the Blade-Control g008946 Figure 19 Switch (PTO) Note: Engaging the blade-control switch (PTO) with the throttle position at half or less causes excessive wear to the drive belts. -
Page 22: Operating The Ignition Switch
Operating the Ignition Starting and Shutting Off Switch the Engine Turn the ignition key to the S position TART Starting the Engine (Figure 21). Raise the roll bar up and lock it into place, sit on Note: When the engines starts, release the key. the seat, and fasten the seat belt. - Page 23 Note: Additional starting cycles may be required when starting the engine for the first time after the fuel system has been without fuel completely. g008947 Figure 23 Shutting Off the Engine CAUTION Children or bystanders may be injured if they move or attempt to operate the machine while it is unattended.
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Page 24: Using The Motion-Control Levers
Using the Motion-Control CAUTION Levers Machine can spin very rapidly. Operator may lose control of machine and cause personal injury or damage to machine. • Use caution when making turns. • Slow the machine down before making sharp turns. c:\data\documentum\checkout\g004532 Figure 25 1. - Page 25 Driving Forward Driving Backward Move the levers to the center, unlocked position. Note: The engine stops when you move the traction-control with the parking brake engaged. To go backward, slowly pull the motion-control levers rearward (Figure 27). To stop, pull the motion-control levers to the N EUTRAL position.
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Page 26: Stopping The Machine
Stopping the Machine Adjusting the Height of Cut To stop the machine, move the traction-control levers Using the Transport Lock to neutral, and then move them to the locked position, disengage the blade-control switch (PTO), and turn The transport lock has 2 positions, and is used with the ignition key to the O position. -
Page 27: Adjusting The Anti-Scalp Rollers
Adjusting the Height-of-Cut Pin Adjusting the Anti-Scalp Rollers The height-of-cut is adjusted from 25 to 140 mm (1 to 5-1/2 inches) in 6 mm (1/4 inch) increments by relocating the clevis pin into different hole locations. Whenever you change the height-of-cut, it is recommended to adjust the height of the anti-scalp Move the transport lock to the lock position. -
Page 28: Adjusting The Flow Baffle Cam Locks
g027727 Figure 33 g000944 Figure 32 1. Anti-scalp roller 4. Flange nut 5. Bolt 2. Spacer Positioning the Flow Baffle 3. Bushing The following figures are only recommendations for use. Adjustments vary by grass type, moisture content, and the height of the grass. Adjusting the Flow Baffle Note: If the engine power draws down and the... - Page 29 Position B Use this position when bagging. Always align it with the blower opening. g005833 Figure 35 Position C This is the full open position. The suggested use for this position is as follows: • Tall, dense grass mowing conditions •...
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Page 30: Operating Tips
It is best to cut only about a third of the grass blade. genuine Toro replacement blade. Cutting more than that is not recommended unless grass is sparse, or it is late fall when grass grows more slowly. -
Page 31: After Operation
After Operation After Operation Safety General Safety • Clean grass and debris from the cutting units, mufflers, and engine compartment to help prevent fires. Clean up oil or fuel spills. • Shut off the fuel before storing or transporting the machine. -
Page 32: Transporting The Machine
Note: This allows hydraulic fluid to bypass the Use the tie-down loops on the machine to pump enabling the wheels to turn. securely fasten it to the trailer or truck with straps, chains, cable, or ropes (Figure 39). Disengage the parking brake before pushing the machine. - Page 33 WARNING Loading a machine onto a trailer or truck increases the possibility of tip-over and could cause serious injury or death (Figure 41). • Use extreme caution when operating a machine on a ramp. • Use only a full-width ramp; do not use individual ramps for each side of the machine.
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Page 34: Maintenance
Every 500 hours • Adjust the caster-pivot bearing. • Check the parking brake adjustment. • Change the hydraulic filters and hydraulic fluid when using Toro® HYPR-OIL™ 500 hydraulic fluid (more often in dirty or dusty conditions). • Check the battery charge. -
Page 35: Pre-Maintenance Procedures
If you leave the key in the ignition switch, someone could accidently start the engine and seriously injure you or other bystanders. Remove the key from the ignition before you perform any maintenance. Pre-Maintenance genuine Toro replacement parts and accessories. Replacement parts and accessories made by Procedures other manufacturers could be dangerous, and such use could void the product warranty. -
Page 36: Lubrication
Lubrication Yearly—Repack the front caster-wheel bearings (more often in dirty or dusty conditions). Grease more frequently when operating conditions Disengage the blade-control switch (PTO), move are extremely dusty or sandy. the motion-control levers to the N EUTRAL LOCK position, and engage the parking brake. Grease Type: No. -
Page 37: Lubricating The Caster-Wheel Hubs
Lubricating the Thread a grease fitting into the hole. Pump grease into the fitting until it oozes out Caster-Wheel Hubs around the top bearing. Service Interval: Yearly Remove the grease fitting in the hole. Shut off the engine, wait for all moving parts to Install the hex plug and dust cap (Figure 45). -
Page 38: Engine Maintenance
Engine Maintenance With the open end of the wheel facing up, fill the area inside the wheel around the axle full of general-purpose grease. WARNING Insert the second bearing and new seal into the Contact with hot surfaces may cause personal wheel. -
Page 39: Servicing The Engine Oil
Servicing the Engine Oil Oil Type: Detergent oil (API service SG, SH, SJ, or higher) Oil Capacity for Models 74923, 74925, and 74927 engines: with a filter change, 2.3 L (77 oz); with no filter change, 2.1 L (70 oz) Oil Capacity for Models 74922, 78922, and 78924 engines: with a filter change, 2.1 L (71 oz);... - Page 40 Changing the Engine Oil Shut off the engine, remove the key, and wait for all moving parts to stop before leaving the Service Interval: After the first 8 hours operating position (Figure 49). Every 100 hours (more often in dirty or dusty conditions).
- Page 41 Changing the Engine-Oil Filter Slowly pour approximately 80% of the specified oil into the filler tube and slowly add the Service Interval: Every 200 hours additional oil to bring it to the Full mark (Figure 51). Note: Change the engine-oil filter more frequently when operating conditions are extremely dusty or sandy.
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Page 42: Servicing The Spark Plug
Servicing the Spark Plug Service Interval: Every 100 hours Make sure 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(s) and a gapping tool/feeler g009922 gauge to check and adjust the air gap. -
Page 43: Checking The Spark Arrester
Installing the Spark Plug Install the left hydraulic-unit shroud (Figure 53). Tighten the spark plug(s) to 24.4 to 29.8 N∙m (18 to Checking the Spark Plug 22 ft-lb). 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. -
Page 44: Fuel System Maintenance
Servicing the Fuel Tank Fuel System Maintenance Do not attempt to drain the fuel tank. Ensure that an Authorized Service Dealer drains the fuel tank and services any components of the fuel system. Replacing the Fuel Filter Service Interval: Every 500 hours/Yearly (whichever comes first) (more often in dirty or dusty conditions). -
Page 45: Electrical System Maintenance
Removing the Battery Electrical System Maintenance WARNING Battery terminals or metal tools could short against metal machine components causing Electrical System Safety sparks. Sparks can cause the battery gasses to explode, resulting in personal injury. • Disconnect the battery before repairing the machine. -
Page 46: Servicing The Fuses
Installing the Battery Note: Position the battery in the tray with the terminal posts opposite from the hydraulic tank (Figure 58). g000960 Figure 60 1. Positive battery post 3. Red (+) charger lead 2. Negative battery post 4. Black (-) charger lead g032526 Servicing the Fuses Figure 59... -
Page 47: Drive System Maintenance
Drive System Maintenance Checking the Seat Belt Service Interval: Before each use or daily Visually inspect seat belt for wear, cuts, and proper operation of retractor and buckle. Replace before operating if damaged. Checking the Rollover Protection System (ROPS) Knobs Service Interval: Before each use or daily WARNING To avoid injury or death from rollover: keep... -
Page 48: Checking The Tire Pressure
If it tracks to the left, loosen the bolts and adjust the right stop plate rearward on the right T-slot until the machine tracks straight (Figure 63). Tighten the stop plate (Figure 63). g001055 Figure 64 Checking the Wheel-Lug Nuts Check and torque the wheel lug nuts to 122 to 129 N∙m (90 to 95 ft-lb). -
Page 49: Adjusting The Caster-Pivot Bearing
g001297 Figure 66 1. Spring washers 3. Dust cap g027341 2. Lock nut Figure 65 1. Slotted nut Using the Clutch Shim Adjusting the Caster-Pivot Some later model year units have been built with clutches that contain a brake shim. When the clutch Bearing brake has worn to the point where the clutch no longer engages consistently, the shim can be removed to... - Page 50 Removing the Clutch Shim Using needle-nose pliers, or by hand, hold the tab and remove the shim (Figure 70). Shut off the engine, wait for all moving parts to stop, remove the key, engage the parking brake, Note: Do not discard the shim until proper and allow the machine to cool completely before clutch function has been confirmed.
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Page 51: Cooling System Maintenance
Cooling System Maintenance Cleaning the Engine Screen and Engine-Oil Cooler Service Interval: Before each use or daily g010873 Remove any buildup of grass, dirt, or other debris Figure 72 from the oil cooler (Figure 73). 1. Feeler gauge • If the gap is less than 0.25 mm (0.01 inch), then install the shim;... -
Page 52: Checking And Cleaning The Hydraulic-Unit Shrouds
Checking and Cleaning the Hydraulic-Unit Shrouds Service Interval: Before each use or daily Disengage the blade-control switch (PTO) and engage the parking brake. Shut off the engine, remove the key, and wait for all moving parts to stop before leaving the operating position. -
Page 53: Brake Maintenance
Brake Maintenance Adjusting the Parking Brake Service Interval: After the first 100 hours Every 500 hours thereafter Note: This procedure must be followed after the first 100 hours or when a brake component has been removed or replaced. Drive the machine onto a level surface. g026961 Disengage the blade-control switch (PTO), move Figure 76... -
Page 54: Belt Maintenance
Belt Maintenance Inspecting the Belts Service Interval: Every 50 hours 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 55: Replacing The Hydraulic Pump-Drive Belt
Replacing the Hydraulic Pump-Drive Belt Disengage the blade-control switch (PTO) and engage the parking brake. Shut off the engine, remove the key, and wait for all moving parts to stop before leaving the operating position. Remove the mower belt; refer to Replacing the Mower Belt (page 54). -
Page 56: Controls System Maintenance
Controls System Unhook the idler spring from the frame (Figure 80). Maintenance Remove the belt from the hydraulic-unit-drive pulleys and the engine pulley. Install the new belt around engine pulley and Adjusting the the 2 drive pulleys. Control-Handle Position Using a ratchet in the square hole in the idler arm, install the idler spring to the frame (Figure There are 2 height positions for the control... -
Page 57: Adjusting The Motion-Control Linkage
Remove the electrical connection from the seat safety switch, located under the bottom cushion of the seat. Note: The switch is a part of the seat assembly. Temporarily install a jumper wire across the terminals in the connector of the main wire harness. -
Page 58: Adjusting The Motion-Control Damper
Adjusting the Motion the lever, allow the reverse-indicator springs to bring the levers back to neutral. Control Neutral-Lock Pivot Note: The wheels must stop turning or slightly creep in reverse. The flanged nut can be adjusted to obtain a more desired motion-control lever resistance when moving Shut off the unit, remove the jumper wire from it to the N... -
Page 59: Hydraulic System Maintenance
Seek immediate medical attention if fluid is injected into skin. Injected fluid must be surgically removed within a few hours by a doctor. Servicing the Hydraulic System Hydraulic-Fluid Type: Toro ® HYPR-OIL ™ hydraulic fluid or Mobil ® 1 15W-50. - Page 60 Mobil ® 1 fluid (more often in dirty or dusty conditions). Every 500 hours—Change the hydraulic filters and hydraulic fluid when using Toro ® HYPR-OIL ™ 500 hydraulic fluid (more often in dirty or dusty conditions).
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Page 61: Mower Deck Maintenance
Mower Deck Install the replacement hydraulic filter. Install the pump-drive belt and the mower belt. Maintenance Remove the jack stands and lower the machine (Figure 87). Leveling the Mower Deck Add oil to the hydraulic reservoir and check for any leaks. Clean up any spilled oil. - Page 62 g009196 Figure 90 1. 7.6 cm (3 inch) at position 3. Measure here from the A is correct blade tip to the hard surface 4. Measure at position A and 2. 8.3 cm (3-1/4 inch) at g027343 position B is correct B on both sides Figure 89 1.
- Page 63 Note: Loosen or tighten the single-point adjustment bolt enough to move the height-of-cut plate mounting bolts at least 1/3 the length of the available travel in their slots. This regains some up and down adjustment on each of the 4 deck links. g017036 Figure 93 g027344...
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Page 64: Servicing The Cutting Blades
Servicing the Cutting Inspecting the Blades Blades Service Interval: Before each use or daily Inspect the cutting edges (Figure 94). To ensure a superior quality of cut, keep the blades If the edges are not sharp or have nicks, remove sharp. - Page 65 LOCK position, and engage the parking brake. ensure optimum performance and continued safety conformance of the machine, use genuine Toro Shut off the engine, remove the key, and wait replacement blades. Replacement blades made by for all moving parts to stop before leaving the other manufacturers may result in nonconformance operating position.
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Page 66: Removing The Mower Deck
Removing the Mower Deck Note: If the blade stays in a horizontal position, the blade is balanced and can be used. Before servicing or removing the mower deck, lock Note: If the blade is not balanced, file some out the spring-loaded deck arms. metal off the end of the sail area only (Figure 97). - Page 67 g009197 Figure 101 g009038 1. Right stabilizer Figure 100 2. Deck strut (right side shown) 1. Clutch pulley 5. Square hole in the idler 3. Remove the shoulder bolt and nut. arm for the ratchet 4. Remove the shoulder bolt and nut. 2.
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Page 68: Replacing The Grass Deflector
Replacing the Grass Cleaning Deflector Cleaning under the Mower WARNING Service Interval: Before each use or daily An uncovered discharge opening could allow Disengage the blade-control switch (PTO), move the lawn mower to throw objects at you or the motion-control levers to the N EUTRAL LOCK bystanders, resulting in serious injury. -
Page 69: Storage
Storage Note: A fuel stabilizer/conditioner is most effective when mixed with fresh fuel and used at all times. Cleaning and Storing the Run the engine to distribute conditioned fuel through the fuel system (5 minutes). Machine Shut off the engine, allow it to cool, and Disengage the blade-control switch (PTO), drain the fuel tank;... -
Page 70: Troubleshooting
Troubleshooting Problem Possible Cause Corrective Action The starter does not crank. 1. The blade-control switch (PTO) is 1. Move the blade-control switch (PTO) engaged. to the disengaged position. 2. The parking brake is disengaged. 2. Engage the parking brake. 3. The motion-control levers are not in 3. - Page 71 Problem Possible Cause Corrective Action The machine does not drive. 1. The bypass valves are not closed tight. 1. Tighten the bypass valves. 2. The pump belt is worn, loose, or 2. Change the belt. broken. 3. The pump belt is off a pulley. 3.
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Page 72: Schematics
Schematics g009180 Wire Diagram (Rev. A) - Page 73 Notes:...
- Page 74 Notes:...
- Page 75 Notes:...
- Page 76 Customers who have purchased Toro products outside the United States or Canada should contact their Toro Distributor (Dealer) to obtain guarantee policies for your country, province, or state. If for any reason you are dissatisfied with your Distributor's service or have difficulty obtaining guarantee information, contact the Toro importer. If all other remedies fail, you may contact us at Toro Warranty Company.