Form No. 3327-566 Mid–Size Mower ProLine Gear 12.5 hp with 32 or 36 Side Discharge Mower Model No. 30520—Serial No. 220000001 and Up Model No. 30521—Serial No.
Warning Think Safety First . . . . . . . . . . . . . . . . . . . . . . . . . Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating the Parking Brake and Neutral Locks . Starting the Engine . . . . . . . . . . . . . . . . . . . . . . . . Stopping the Engine . . . . . . . . . . . . . . . . . . . . . . . Operating the Blade Control (PTO) Lever . . . . . . Understanding the Safety Interlock System . . . . . Driving Forward or Backward . . . . . . . . . . . . . . .
Introduction Safety Read this manual carefully to learn how to operate and maintain your product properly. The information in this manual can help you and others avoid injury and product damage. Although Toro designs and produces safe products, you are responsible for operating the product properly and safely. This machine meets or exceeds the B71.4–1999 specifications of the American National Standards Institute in effect at the time of production.
• Slow down and use caution when making turns and crossing roads and sidewalks. Stop blades if not mowing. • Use extra care when handling gasoline and other fuels. They are flammable and vapors are explosive. • Use only an approved container. • Be aware of the mower discharge direction and do not point it at anyone. • Never remove gas cap or add fuel with engine running. Allow engine to cool before refueling. Do not smoke. • Do not operate the mower under the influence of alcohol or drugs.
• Avoid starting or stopping on a slope. If tires lose traction, disengage the blades. This product is designed for cutting and recycling grass or, when equipped with a grass bagger, for catching cut grass. Any use for purposes other than these could prove dangerous to user and bystanders. • Mow slopes side-to-side. DO NOT General Operation • Do not mow slopes greater than 15 degrees. • Allow only responsible adults who are familiar with the instructions to operate the machine.
Slope Chart 7
Safety and Instruction 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. 1-43005 66-1340 67-5360 54-9220 95-2814 63-8440 1.
98-5130 1. Warning—read the Operator’s Manual for instructions on torquing the blade bolt/nut to 75-80 ft.-lb.(102-106 N⋅m). 95-5537 105-4104 1. Read the Operator’s Manual for instructions on operating the cutting blade 2. Push forward to engage 3. Pull back to disengage 1. Reverse 2. Neutral 3. Transmission speeds 105-4111 98-0776 98-3296 106-2734 1. Choke 2. Fast 3. Continuous variable setting 10 4. Slow 5.
106-2736 1. Park 2. Drive 3. Neutral 11 4. Warning—wear hearing protection.
Gasoline and Oil Warning Recommended Gasoline Gasoline is harmful or fatal if swallowed. Long-term exposure to vapors can cause serious injury and illness. Use unleaded regular gasoline suitable for automotive use (85 pump octane minimum). Use leaded regular gasoline if unleaded regular is not available. • Avoid prolonged breathing of vapors. • Keep face away from nozzle and fuel tank or conditioner opening. • Keep gasoline away from eyes and skin.
Setup Note: Determine the left and right sides of the machine from the normal operating position. Loose Parts Note: Use the chart below to verify all parts have been shipped. DESCRIPTION QTY. Caster assemblies 2 Bolt, 3/8 x 3/4 in. 8 Flange nut, 3/8 in. 8 Upper handle 1 Flanged bolt, 3/8 x 1 in. 4 Flanged nut, 3/8 in. 4 Wire tie 2 Clevis pin 2 Washer 2 Hairpin cotter 2 Fuel tank 1 Bolt, 5/16 x 3/4 in. 2 Lock washer, 5/16 in. 2 Locknut 2 Washer, 5/16 in.
3. Select the low, middle, or high position for the lower mounting hole according to the operator’s height (Fig. 3). 1 4. Secure each side of the handle to the rear frame (using the lower mounting hole) with a flange bolt (3/8 in. x 1 in.) and a flange nut (Fig. 3). Note: If you change the handle position, you must readjust the control rods and brakes. 3 5. Route the wire harness along the inside of the left handle and under the control panel (Fig. 12). 2 m–3777 6.
Installing the Control Rods 5. Check the operation of the control rod. If you need to adjust it, remove the hairpin cotter and the clevis pin that secure the control rod to the drive levers. 1. Thread the rod fittings an equal distance onto each control rod (Fig. 5). 6. Adjust the control rod length by repeating steps 3 and 4 (Fig. 6). 6 4 1 3 Adjusting the Parking Brakes Refer to Servicing the Brakes, page 31 for checking the brakes and adjusting them. 5 Connecting the Throttle Cable 2 1.
Installing the Blade Control (PTO) Rod 2. Slide the shift lever through the control panel, and align the mounting hole in the shift lever with the square on the transmission shaft (Fig. 9). 1. Rotate the blade control (PTO) lever vertically away from the left handle so that the blade control (PTO) rod drops down (Fig. 8). 3. Secure the lever to the transmission with the spring washer and locknut you previously removed (Fig. 9). 4. Install the spring washer (dish down) and the locknut (Fig. 9). 1 5.
3. Push the fuel line onto the fuel tank fitting, and secure the fuel line with a hose clamp (Fig. 11). 1 7 3 2 5 8 9 2 1 6 m–3778 4 Figure 11 1. Fuel line 2. Hose clamp 3. Fuel fitting 3 Operation m–5907 Figure 12 Note: Determine the left and right sides of the machine from the normal operating position. 1. Throttle control 2. Operator Presence Control (OPC) lever (2) 3. Gear shift lever 4. Drive lever (2) 5.
Setting the Neutral Locks Neutral/parking brake locks—Squeeze the drive levers back and move the locks rearward to activate the neutral lock. Squeeze the drive levers back and move the locks forward to activate the parking brake locks. 1. Squeeze the drive levers back (Fig. 13). 2. Place your thumbs on the upper part of the locks and move them rearward into the Neutral Lock position (Fig. 13). Blade control (PTO) lever—The blade control (PTO) lever engages and disengages power to the mower blades.
The safety interlock system is designed to stop the engine when: 4. Disconnect the wire from the spark plug to prevent someone from accidentally starting the machine while transporting or storing it. • the Operator Presence Control (OPC) levers are released when the transmission or the blades are engaged; 5. Close the fuel shut-off valve before transporting or storing the machine.
Side Discharging or Mulching the Grass 5. Slowly release the drive levers. Note: To go straight, release the drive levers equally. To turn, squeeze the drive lever on the same side as the direction you want to turn. This mower has a hinged grass deflector that disperses clippings to the side and down toward the turf. Driving Backward Danger 1. Ensure that the parking brakes are engaged. 2. Squeeze the OPC levers against the handles.
Adjusting the Wheel Drive Tension Adjusting the Height-of-Cut This machine has a 1 to 4-1/4 in. (26 to 108 mm) range for the height-of-cut. This can be achieved by adjusting blade spacers, rear axle height, and front caster spacers. Use the Height-of-Cut Chart on page 23 to select the combination required. You may need to increase the wheel drive belt tension under certain operating conditions, such as mowing over hilly terrain or while pulling a sulky. 1.
2. Stop the engine and wait for all moving parts to stop before leaving the operating position. 1 2 3. Loosen, but do not remove, the 2 axle pivot bolts and the 2 axle adjustment bolts (Fig. 16). 1 2 3 A B C m–3791 D Figure 17 E 1. Clevis pin 2. Spacer, 3/16 in. (5 mm) m–3789 3. Spacer, 1/2 in. (13 mm) Figure 16 1. Axle pivot bolt 2. Axle adjustment bolt 2. Remove the clevis pin, slide the caster from the support, and change the spacers (Fig. 17). 4.
Height-of-Cut Chart No. of Spacers Below Caster Axle Position 1/2 in. (13mm) 3/16 in. (5 mm) A 0 A Number of 1/4 in. Blade Spacers Below Spindle 4 3 2 1 0 0 1 in. (26 mm) 1–1/4 in. (32 mm) 1–1/2 in. (38 mm) 1–3/4 in. (45 mm) 2 in. (45 mm) 0 1 1–1/8 in. (29 mm) 1–3/8 in. (35 mm) 1–5/8 in. (41 mm) 1–7/8 in. (48 mm) 2–1/8 in. (55 mm) A 1 0 1–3/8 in. (35 mm) 1–5/8 in. (41 mm) 1–7/8 in. (48 mm) 2–1/8 in. (55 mm) 2–3/8 in. (55 mm) B 0 1 1–3/8 in. (35 mm) 1–5/8 in.
Maintenance Note: Determine the left and right sides of the machine from the normal operating position. Important Refer to your engine operator’s manual for additional maintenance procedures.
Caution Someone could accidently start the engine and seriously injure you or other bystanders. Disconnect the wire from the spark plug before you do any maintenance. Set the wire aside so that it does not accidentally contact the spark plug. Servicing the Cutting Blades 2. Inspect the blades, especially the curved area (Fig. 18). If you notice any damage, wear, or a slot forming in this area (item 3 in Fig. 18), immediately install a new blade. To ensure a superior quality of cut, keep the blades sharp.
2 Warning 1 A blade that is bent or damaged could break apart and could seriously injure or kill you or bystanders. m–1854 • Always replace bent or damaged blade with a new blade. • Never file or create sharp notches in the edges or surfaces of the blade. Figure 22 1. Sharpen at original angle 2. Sail 2. Check the balance of the blade by putting it on a blade balancer (Fig. 23). If the blade stays in a horizontal position, the blade is balanced and can be used.
2. Stop the engine and wait for all moving parts to stop before leaving the operating position. Cleaning the Paper Element 3. Clean around the air cleaner to prevent dirt from getting into the engine and causing damage. Unscrew the cover nuts and remove the air cleaner cover (Fig. 24). 1. Lightly tap the element on a flat surface to remove dust and dirt (Fig. 26). 1 1 2 ÓÓÓÓÓ ÓÓÓÓ ÓÓÓÓÓ ÓÓÓÓÓ ÓÓÓÓ ÓÓÓÓÓ 2 3 4 m-5709 Figure 26 5 1. Paper element 2072 2. Rubber seal Figure 24 1. Cover nut 2.
Oil Type: Detergent oil (API service SE/CC, SE, SF, or SG) Important Do not overfill the crankcase with oil and run the engine; engine damage can result. Crankcase Capacity: with filter, 54 oz. (1.6 l) with out filter, 47 oz. (1.4 l) Changing the Engine Oil Viscosity: Refer to the table below 1. Start the engine and let it run five minutes. This warms the oil so that it drains better. USE THESE SAE VISCOSITY OILS 2.
1 3 2 1 m–1256 2 m–2576 Figure 29 1. Oil filter 2. Gasket Figure 30 3. Adapter 1. Spark-plug wire 2. Spark plug 4. Clean around the spark plug to prevent dirt from falling into the engine and potentially causing damage. 3. Apply a thin coat of new oil to the rubber gasket on the replacement filter (Fig. 29). 5. Remove the spark plug and the metal washer. 4.
Installing the Spark Plug Applying the Grease 1. Install the spark plug and the metal washer. Ensure that the air gap is set correctly. 1. Disengage the blade control (PTO) lever and set the parking brakes. 2. Tighten the spark plug to 18 ft.-lb. (24 N.m). 2. Clean the grease fittings with a rag and scrape any paint from the front of the fitting(s). 3. Connect the wire to the spark plug (Fig. 30). Checking the Tire Pressure 3.
3. To adjust the brakes, rotate the wing nuts on the brake rods (Fig. 36). Rotate the wing nuts clockwise to tighten the brakes; rotate them counterclockwise to loosen them. 2 1 m-4749 Figure 35 m–5372 Servicing the Brakes Figure 36 Service Interval/Specification 1. Brake rod Before each use, check the brakes for proper operation. 2. Wing nut Always set the parking brakes when you stop the machine or leave it unattended. If the parking brakes do not hold securely, adjust them. 4.
2. Disengage the blade control (PTO) lever and set the parking brakes. 6. Install a new filter and move the hose clamps close to the filter. 3. Close the fuel shut-off valve in fuel line (Fig. 37). 7. Open the fuel shut-off valve at the fuel tank (Fig. 37). 8. Check for fuel leaks and make any needed repairs. Checking the Belts Service Interval/Specification Check all belts after every 50 operating hours or monthly, whichever occurs first. Look for dirt, wear, cracks, and signs of overheating.
Replacing the Traction Belt 4. Remove the idler pulley and the worn belt (Fig. 39). 5. Install the new mower belt. 1. Disengage the blade control (PTO) lever and set the parking brakes. 6. Install the idler pulley. 2. Stop the engine and wait for all moving parts to stop before leaving the operating position. 7. Engage the blade control (PTO) lever and check the belt tension. Refer to Adjusting the Mower Belt Tension, page 34. 3. Raise the rear of the machine and hold it up with jack stands.
3. Loosen the locknut on the turnbuckle (Fig. 42). 10. Remove the hairpin cotter and the clevis pin from the bell crank. 4. Rotate the turnbuckle toward the rear of the mower to increase the tension on the belt. Rotate the turnbuckle toward the front of the mower to decrease the tension on the belt (Fig. 42). 11. Rotate the clevis clockwise on the rod to increase the clearance; rotate it counterclockwise to decrease it (Fig. 41).
4 Adjusting the Grass/Mud Scraper 3 5 2 1. Loosen the locknut that holds the scraper to the engine frame (Fig. 44). 3 2 1 6 m-3781 Figure 45 1. Deflector 2. Spring 3. Deflector mount 1 m-3776 Figure 44 1. Scraper 2. Locknut 4. Locknut 5. Bolt 6. Spacer 2. Straighten the deflector mounts if they are bent (Fig. 45). 3. Pulley 3. Install a new deflector between the mounts with a spacer and a spring. 2. Rotate the scraper until it aligns with the center of the pulley grooves (Fig. 44). 4.
E D C B A DELTA MODULE (2001) F INTERLOCK MODULE GN BK BN R OR Y BU Y OPERATOR IS PRESENT) (SWITCH CLOSED WHEN GN SW3 OPERATOR PRESENCE SWITCH WHEN BLADE IS ENGAGED) OR (BLADE SWITCH OPENS SW1 BLADE SWITCH WHEN IN NEUTRAL) BN (NEUTRAL SWITCH CLOSES SW2 NEUTRAL SWITCH BK R R GND MODULE IGNITION ORANGE RED YELLOW SPARK PLUG SWITCH CLOSES WHEN THROTTLE PULLED BACK MAG GREEN OR BLUE GN R BROWN Y BU BLACK BN BK WIRE COLOR CODES Wiring Diagram
Cleaning and Storage 9. Empty the fuel tank using the following steps: A. Run the engine to distribute conditioned fuel through the fuel system (5 minutes). 1. Disengage the blade control (PTO) lever and set the parking brakes. B. Stop engine and wait for all moving parts to stop before leaving the operating position. 2. Remove grass clippings, dirt, and grime from the external parts of the entire machine, especially the engine.
Problem The engine g loses power. The engine g overheats. The machine does not drive. There is abnormal vibration. Possible Causes Corrective Action 1. The engine load is excessive. 1. Reduce the ground speed. 2. The air cleaner is dirty. 2. Clean the air cleaner element. 3. The engine oil level in the crankcase is low. 3. Add engine oil to the crankcase. 4. The cooling fins and air passages under the engine blower housing are plugged. 4.
Problem The cutting g height g is uneven. The blades do not rotate. The blades do not stop when they are disengaged. g g Possible Causes Corrective Action 1. The blades are not sharp. 1. Sharpen the blades. 2. The blades are bent. 2. Install new blades. 3. The mower is not level. 3. Level the mower from side-to-side and front-to-rear. 4. The underside of the mower is dirty. 4. Clean the underside of the mower. 5. The tire pressure is incorrect. 5. Adjust the tire pressure. 6.
The Toro Total Coverage Guarantee LCE A One-Year Limited Warranty Conditions and Products Covered Owner Responsibilities The Toro Company and its affiliate, Toro Warranty Company, pursuant to an agreement between them, jointly promise to repair any Toro Product used for commercial, institutional, or rental purposes if defective in materials or workmanship.
