Form No. 3367-141 Rev A TimeCutter® ZD420 Riding Mower Model No. 74433—Serial No. 311000001 and Up To register your product or download an Operator's Manual or Parts Catalog at no charge, go to www.Toro.com.
This machine is a ride-on, rotary-blade lawnmower intended to be used by homeowners in residential applications. It is primarily designed for cutting grass on well-maintained lawns. It is not designed for cutting brush, mowing grass and other growth alongside highways, or for agricultural uses.
Safety Lubrication............................................................. 26 Greasing the Bearings......................................... 26 Engine Maintenance............................................... 27 Replacing the Air Cleaner Element...................... 27 Servicing the Engine Oil ..................................... 27 Servicing the Spark Plug ..................................... 29 Fuel System Maintenance ....................................... 30 Draining the Fuel Tank.............
◊ lack of awareness of the effect of ground conditions, especially slopes; ◊ incorrect hitching and load distribution. • Preparation • While mowing, always wear substantial footwear and long trousers. Do not operate the equipment when barefoot or wearing open sandals. • Thoroughly inspect the area where the equipment is to be used and remove all objects which may be thrown by the machine. • Warning-Fuel is highly flammable. – Store fuel in containers specifically designed for this purpose.
Maintenance and Storage • Do not mow slopes when grass is wet. Slippery conditions reduce traction and could cause sliding and loss of control. • Keep all nuts, bolts and screws tight to be sure the equipment is in safe working condition. • Never store the equipment with fuel in the tank inside a building where fumes can reach an open flame or spark. • Allow the engine to cool before storing in any enclosure.
Uncertainty Value (K) = 0.8 m/s2 Measured values were determined according to the procedures outlined in EN 836. Whole Body Vibration Measured vibration level = 0.58 m/s2 Uncertainty Value (K) = 0.29 m/s2 Measured values were determined according to the procedures outlined in EN 836 (Riding & Stand-Ons).
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. 2. Align this edge with a vertical surface, a tree, building, fence pole, etc. 3. Example of how to compare slope with folded edge.
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 lost. 110-6691 1. Thrown objects hazard–keep bystanders a safe distance from the machine. 2. Thrown objects hazard, mower–keep the discharge deflector or collection system in place. 3. Cutting/dismemberment of hand or foot–stay away from moving parts. 106-2224 1. 2. 3. 4.
Battery Symbols Some or all of these symbols are on your battery 106-8742 1. Explosion hazard 1. Parking brake 2. No fire, open flame, or smoking. 3. Caustic liquid/chemical burn hazard 4. Wear eye protection 106-8743 5. Read the Operator’s Manual. 1. Height of cut 108-8769 1. Collect position 2. Recycler® position 108-8759 1. Belt routing 9 6. Keep bystanders a safe distance from the battery. 7. Wear eye protection; explosive gases can cause blindness and other injuries 8.
110-6567 1. Warning—read the Operator’s Manual. 2. Warning—read the instructions before servicing or performing maintenance; move the motion control levers to the brake position, remove the ignition key and disconnect the spark plug wire. 3. Cutting/dismemberment hazard, mower blade; entanglement hazard, belt—do not open or remove safety shields while engine is running. 4.
Product Overview Figure 4 1. Motion control lever 2. Height-of-cut lever 3. Control panel 7. Mower deck 8. Recycle-on-demand lever 9. Rear drive wheel 4. Collection bag 5. DFS lever 6. Operator’s position, seat 10. Cup holder 11. Footrest 12. Front caster wheel Figure 5 Collection bag removed 1. Motion control lever 2. Height of cut lever 4. Collection sensors 5. Rear access panel 7. Mower deck 8. Engine cover 3. Gas tank cap 6. Rear drive wheel 9. Discharge chute 11 10. Rear frame 11.
Controls the center position engages the parking brake and allows the operator to exit the machine (Figure 6). Become familiar with all of the controls in Figure 4, Figure 5, Figure 6 and Figure 7 before you start the engine and operate the machine. Parking Brake The parking brake is automatically set when the motion control levers are in the brake position. Always position the motion control levers into the brake position when you stop the machine or leave it unattended (Figure 6).
Throttle/Choke Control Operation The throttle and choke is combined into one control lever. The throttle controls the engine speed and it has a continuous variable setting from Slow to Fast. Engage the choke by moving the lever past the Fast setting until it stops (Figure 7). Note: Determine the left and right sides of the machine from the normal operating position. Think Safety First Please carefully read all of the safety instructions and decals in the safety section.
Important: Never use methanol, fuel containing methanol, or gasohol containing more than 10% ethanol because the fuel system could be damaged. Do not mix oil with fuel. WARNING Fuel is harmful or fatal if swallowed. Long-term exposure to vapors can cause serious injury and illness. DANGER • Avoid prolonged breathing of vapors. 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.
Starting and Stopping the Engine Starting the Engine Figure 12 1. Sit down on the seat and move the motion controls to the brake position. 1. Off 2. Run 2. Disengage the blades by moving the blade control switch to Off (Figure 10). 3. Start 4. Ignition Stopping the Engine 1. Move the throttle lever to Fast (Figure 11). 2. Disengage the blades by moving the blade control switch to Off (Figure 10). 3. Turn the ignition key to Off (Figure 12). 4.
2. Move the throttle to the Fast position. 3. Pull out on the blade control switch to engage blades (Figure 14). Figure 13 1. Center unlock position 2. Forward 3. Backward 4. Brake position Figure 14 1. Blade control switch-On 2. Blade control switch-Off To go straight, apply equal pressure to both motion control levers (Figure 13). Disengaging the Blades To turn, release pressure on the motion control lever toward the direction you want to turn (Figure 13).
Understanding the Safety Interlock System The safety interlock system is designed to prevent the engine from starting unless: • The blades are disengaged. • The motion control levers are in the brake position. The safety interlock system also is designed to stop the engine when the control levers are out of the brake position and you rise from the seat when the blades are engaged.
Emptying the Collection System A. Raise the lever to the upright position to open the deck door and allow clippings to be collected. Once the collection bag fills with enough grass to cover one or both of the sensors and break the infrared beam a beeping alarm will sound to alert the operator. The alarm shuts off once the blade control switch is turned Off. If one or both sensors are unplugged the mower blades will not engage. B.
Collection Bag Removing the Collection Chute The collection bag is retained in the engine cover by seating the lever side pin into a holed bracket in the right hand side of the engine cover. To remove, raise the bag up and first lift the pin in the open notch up and away from the cover. Then slide the lever side pin out the bracket until the bag is clear of the machine. When installing, seat this side first and then place the opposing pin in the open notch in the engine cover.
6. Return to the machine. Inspect the internal engine compartment and clear any clippings or debris dislodged during chute removal. WARNING Debris built up in the engine compartment, if not removed, could be ignited by a hot engine. A fire in the engine compartment could can burn you and others and can damage property. • Before using and while the engine is cool, check for debris in the engine compartment. • Keep the machine free of grass, leaves, or other debris build-up.
or completely surround the housing by uncut grass. Always try to have one side of the mower deck free from uncut grass; allowing air to be drawn into the mower deck. When making an initial cut through the center of an uncut area, operate the machine slower and back up if the mower starts to clog. To ensure optimum performance, clean the underside of the mower housing after each use. If residue is allowed to build up in the mower housing, cutting performance can decrease.
Adjusting the Motion Control Levers The machine is now able to be pushed by hand. The motion control levers can be adjusted higher or lower for maximum operator comfort. 1. Remove the 2 bolts holding the control lever to the control arm shaft (Figure 22). 2. Move the control lever to the next set of holes. Secure the lever with the 2 bolts (Figure 22). Figure 23 1. Bypass lever, lever position for pushing the machine 2.
Long Grass Operating Tips If the grass is ever allowed to grow slightly longer than normal, or if it contains a high degree of moisture, raise the cutting height higher than usual and cut the grass at this setting. Then cut the grass again using the lower, normal setting. Fast Throttle Setting For best mowing and maximum air circulation, operate the engine at the Fast position.
Maintenance Note: Determine the left and right sides of the machine from the normal operating position. Recommended Maintenance Schedule(s) Maintenance Service Interval Maintenance Procedure After the first 5 hours • Change the engine oil. Before each use or daily • • • • • Test the safety interlock system. Check the engine oil level. Check the cutting blades. Wipe clean the collection sensors. Clean the mower housing. Every 25 hours • Grease all lubrication points.
Premaintenance Procedures Accessing the Machine Some internal components can be accessed by simply raising the seat. Use the following procedures to access to the internal components as needed when performing the maintenance procedures described in this manual. G005900 Figure 26 Removing the Engine Hood Remove the engine hood to gain access to the engine compartment. To remove the engine hood the collection bag must be emptied and removed first.
Lubrication Greasing the Bearings Service Interval: Every 25 hours—Grease all lubrication points. Grease Type: No. 2 General Purpose Lithium Base Grease 1. Park the machine on a level surface and disengage the blade control switch. Figure 28 1. Rear access panel 2. Fastener 2. Move the motion control levers to the brake position, stop the engine, remove the key, and wait for all moving parts to stop before leaving the operating position. 3. Frame Installing the Engine Hood 3.
Engine Maintenance Viscosity: See the table below. Replacing the Air Cleaner Element Service Interval: Every 100 hours 1. Park the machine on a level surface and disengage the blade control switch. 2. Move the motion control levers to the brake position, stop the engine, remove the key, and wait for all moving parts to stop before leaving the operating position. 3. Remove the engine hood. 4. Clean around the air cleaner to prevent dirt from getting into the engine and causing damage. 5.
Figure 35 2. Metal end 1. Oil dipstick 4. Screw the oil dipstick fully onto the fill hole. Unscrew the dipstick, pull it out, and look at the end. If the oil level is low, slowly pour only enough oil into the fill hole to raise the level to, but not over, the Full mark on the dipstick. Figure 36 Important: Do not overfill the crankcase with oil because the engine may be damaged. 1. Oil drain hose, clipped on the engine shroud Changing the Oil 2. Oil drain hose cap 7.
Figure 37 1. Oil filter 2. Gasket 3. Adapter Figure 38 4. Install the replacement oil filter to the filter adapter. Turn the oil filter clockwise until the rubber gasket contacts the filter adapter; then tighten the filter an additional 1/2 to 3/4 turn (Figure 37). 1. Spark plug wire 2. Muffler 4. Remove the spark plug and metal washer. 5. Fill the crankcase with the proper type of new oil; refer to Changing and Draining the Oil. Checking the Spark Plug 1.
Fuel System Maintenance Important: Always make sure the panel is replaced and secured with the fasteners before operating the machine. Operating the machine with the access panel open would allow clippings and other debris entering the engine compartment possibly damaging the machine. Draining the Fuel Tank Service Interval: Before storage—Drain the fuel tank. DANGER In certain conditions, fuel is extremely flammable and highly explosive.
Electrical System Maintenance Servicing the Battery Always keep the battery clean and fully charged. Use a paper towel to clean the battery case. If the battery terminals are corroded, clean them with a solution of four parts water and one part baking soda. Apply a light coating of grease to the battery terminals to prevent corrosion. Figure 41 1. Hose clamp 2. Fuel line Voltage: 12 V 3. Filter Removing the Battery WARNING 6. Pull the fuel line off of the fuel filter (Figure 41).
5. Slide the rubber cover up the positive (red) cable. Disconnect the positive (red) cable from the battery post (Figure 42). 6. Remove the battery hold-down (Figure 42) and lift the battery from the battery tray. Figure 43 1. Vent caps 2. Upper line 3. Lower line 3. If the electrolyte is low, add the required amount of distilled water; refer to Adding Water to the Battery. Adding Water to the Battery The best time to add distilled water to the battery is just before you operate the machine.
3. Make sure that the vent caps are installed in the battery. Charge the battery for 1 hour at 25 to 30 amps or 6 hours at 4-6 amps. Do not overcharge the battery. 1. Raise the seat to gain access to the fuse holder (Figure 45). 2. To replace a fuse, pull out on the fuse to remove it (Figure 45). 4. When the battery is fully charged, unplug the charger from the electrical outlet, then disconnect the charger leads from the battery posts (Figure 44). Figure 44 1. Positive battery post 2.
Drive System Maintenance Mower Maintenance Checking the Tire Pressure Maintain sharp blades throughout the cutting season because sharp blades cut cleanly without tearing or shredding the grass blades. Tearing and shredding turns grass brown at the edges, which slows growth and increases the chance of disease. Servicing the Cutting Blades Service Interval: Every 25 hours—Check tire pressure. Maintain the air pressure in the front and rear tires as specified. Uneven tire pressure can cause uneven cut.
WARNING A blade that is bent or damaged could break apart and could seriously injure or kill you or bystanders. • Always replace bent or damaged blade with a new blade. • Never file or create sharp notches in the edges or surfaces of blade. Figure 47 1. Cutting edge 2. Curved area 3. Wear/slot forming Removing the Blades The blades must be replaced if a solid object is hit, if the blade is out of balance, or the blade is bent.
5. Carefully rotate the blade(s) side to side (Figure 52). Measure between the outside cutting edges and the flat surface (Figure 52). If both measurements are not within 3/16 inch (5 mm), an adjustment is required; continue with this procedure. Figure 50 1. Sharpen at original angle 2. Check the balance of the blade by putting it on a blade balancer (Figure 51). If the blade stays in a horizontal position, the blade is balanced and can be used.
Adjusting the Front-to-Rear Blade Slope 10. Measure from the tip of the front blade to the flat surface and the tip of the rear blade to the flat surface (Figure 55). If the front blade tip is not 1/16-5/16 inch (1.6-7.9 mm) lower than the rear blade tip, adjust the front locknuts. Check the front-to-rear blade level any time you install the mower. If the front of the mower is more than 5/16 inch (7.9 mm) lower than the rear of the mower, adjust the blade level using the following instructions: 1.
5. Remove the hairpin cotter and washer from the adjusting rod (Figure 58) on each side of the mower. 6. Remove the hairpin cotter and washer at the mower leveling brackets (Figure 58) on each side of the mower. Note which hole the leveling bracket is mounted in for future installation. Slide the brackets off of the mounting pin. Figure 56 1. Locknut and adjusting nut 2. Front tire 3. Adjustment nut 4. Lock nut 14.
5. Pull the idler arm in the direction shown in Figure 59 and roll the belt off of the pulleys. 5. Lower the height-of-cut lever to the lowest position. 6. Attach the adjusting rod to the machine with the washer and hairpin cotter (Figure 58) on each side of the mower. 7. Slide the leveling brackets onto the mounting pins and secure them with the washers and hairpin cotters (Figure 58). 8. Attach the front support rods to the machine with the clevis pins and hairpin cotters (Figure 57). 9.
Cleaning Cleaning the Collection Sensors Service Interval: Before each use or daily—Wipe clean the collection sensors. In the event the collection bag alarm goes off and the bag is less than full, gently wipe off the faces of the sensors with a soft cloth. The cloth can be damp with water. Important: Do not use solvents or chemicals of any kind to clean the face of the sensors. Figure 60 1. Washout fitting 2.
Storage Important: Do not store stabilizer/conditioned gasoline over 30 days. Cleaning and Storage 11. Remove the spark plug(s) and check its condition; refer to Servicing the Spark Plug in the Engine Maintenance section. With the spark plug(s) removed from the engine, pour two tablespoons of engine oil into the spark plug hole. Use the starter to crank the engine and distribute the oil inside the cylinder. Install the spark plug(s). Do not install the wire on the spark plug(s). 1.
Troubleshooting Problem The engine overheats. Possible Cause 1. The engine load is excessive. 1. Reduce ground speed. 2. The oil level in the crankcase is low. 3. The cooling fins and air passages under the engine blower housing are plugged. 4. The air cleaner is dirty. 2. Add oil to the crankcase. 3. Remove the obstruction from the cooling fins and air passages. 5. Dirt, water, or stale fuel is in fuel system.
Problem There is abnormal vibration. Reduced bagging performance. Frequent clogging of chute system. Possible Cause 1. The engine mounting bolts are loose. 1. Tighten the engine mounting bolts. 2. The engine pulley, idler pulley, or blade pulley is loose. 3. The engine pulley is damaged. 4. The cutting blade(s) is/are bent or unbalanced. 5. A blade mounting bolt is loose. 6. A blade spindle is bent. 2. Tighten the appropriate pulley. 1. Low engine speed. 1.
Schematics Electrical Diagram (Rev.
Notes: 45
Notes: 46
International Distributor List Distributor: Atlantis Su ve Sulama Sisstemleri Lt Balama Prima Engineering Equip. B-Ray Corporation Casco Sales Company Ceres S.A. CSSC Turf Equipment (pvt) Ltd. Cyril Johnston & Co. Equiver Femco S.A. G.Y.K. Company Ltd. Geomechaniki of Athens Guandong Golden Star Hako Ground and Garden Hako Ground and Garden Hayter Limited (U.K.) Hydroturf Int. Co Dubai Hydroturf Egypt LLC Ibea S.P.A. Irriamc Irrigation Products Int’l Pvt Ltd. Jean Heybroek b.v. Lely (U.K.
The Toro Total Warranty Conditions and Products Covered The Toro Company and its affiliate, Toro Warranty Company, pursuant to an agreement between them, jointly promise to the original purchaser to repair the Toro Products listed below if defective in materials or workmanship. 2. Bring the product and your proof of purchase (sales receipt) to the Service Dealer. 3.
