Form No. 3328-777 52in Mower for Mid-Size Traction Unit Model No. 30151—240000001 & Up Operator’s Manual Register your product at www.Toro.
Introduction We want you to be completely satisfied with your new product, so feel free to contact your local Authorized Service Dealer for help with service, genuine replacement parts, or other information you may require. Whenever you contact your Authorized Service Dealer or the factory, always know the model and serial numbers of your product. These numbers will help the Service Dealer or Service Representative provide exact information about your specific product.
Contents Safety and Instruction Decals . . . . . . . . . . . . . . . . . . Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Loose Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Installing the Castor Wheels . . . . . . . . . . . . . . . . Installing the Carrier Frame to the Traction Unit Installing the Cutting Deck . . . . . . . . . . . . . . . . . Installing the Drive Belt . . . . . . . . . . . . . . . . . . . . Operation . . . . . . . . . . . . . . . . . . . .
Safety 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. See Traction Unit Operator’s Manual for Glossary of Safety Symbols ON BOTH SIDES OF CUTTING UNIT (Part No. 66-1340) ON LEFT, CENTER AND RIGHT SIDES OF DECK, UNDER SHIELDS (Part No. 67-5360) DANGER DO NOT OPERATE THIS UNIT UNLESS ALL SHIELDS ARE FIRMLY SECURED. ON LEFT SIDE OF CUTTING UNIT (Part No.
Assembly Loose Parts Note: Use the chart below to identify parts used for assembly. DESCRIPTION QTY.
Assembly Installing the Castor Wheels 1. Place the 2 thrust washers and spacer onto the castor wheel fork (Fig. 1). 2. Insert the castor wheel fork into the carrier frame mounting tube (Fig. 1). 3. Install 2 thrust washers onto the castor wheel fork, then secure with a locking pin (Fig. 1). Installing the Carrier Frame to the Traction Unit 1. Align the carrier frame holes with the mounting holes in the traction unit frame (Fig. 2). 2.
Assembly Installing the Cutting Deck Installing the Drive Belt 1. Position the cutting deck under the carrier frame. 1. Remove the hand knobs holding the deck cover to the top of the cutting unit and remove the deck cover. 2. Mount the cutting deck to the carrier frame with four (4) clevis pins and hairpin cotters (Fig. 3). Note: All four pins must be in the same hole locations to prevent uneven cutting. 8 1 2.
Assembly 4. Thread two (2) 1/2 inch jam nuts approximately 9 inch (22.8 cm) up on each adjusting shaft (Fig. 5). 5. Slide a 1/2 inch spacer, spring and bushing onto each adjusting shaft. Make sure to install the bushing with the flange end against the spring (Fig. 5). 9. Check the position of the belt guides. The guides should be positioned about 1/8 inch (3 mm) away from the belt (Fig. 7). Adjust the belt guides as necessary. 1 3 1 2 3 6 4 5 m–2542 m–7759 Figure 5 1. 2. 3. 4.
Operation Side Discharge or Mulch Grass The mower has a hinged grass deflector that disperses clippings to the side and down toward the turf. Adjusting the Height-of-Cut The height-of-cut is adjustable from 2 inch to 5 inch (51 to 127 mm) in 1/2-inch (13 mm) increments by relocating the clevis pins in different hole locations in brackets at each corner of the cutting unit (Fig. 8). Stop the engine before adjusting the height-of-cut. Note: All four pins must be in the same hole location for even cutting.
Operation Adjusting Gage Wheels Adjusting Center Gage Wheels The gage wheels must be adjusted in the proper hole location for each height-of-cut position. The gage wheels must be adjusted in the proper hole location for each height-of-cut position. 1. After adjusting height-of-cut remove nut and washer while holding stud with wrench (Fig. 9). 1. After adjusting height-of-cut remove bolt and nut (Fig. 10). Note: Do not remove the wheel nut and washer (Fig. 9). 2.
Operation Tips for Mowing Grass Long Grass Fast Throttle Setting 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. For best mowing and maximum air circulation, operate the engine at FAST.
Maintenance Service Interval Chart Service Operation Each Use Cutting Blades – check 8 Hours 25 Storage Hours Service X X Belts – check for wear/cracks X Blade Spindle Bearings – grease X Idler Arm – grease X Castor Wheels – grease X Mower Housing – clean X Chipped Surfaces – paint Cutting Blades To ensure a superior quality of cut, keep the blades sharp. For convenient sharpening and replacement, you may want to keep extra blades on hand.
Maintenance Inspecting the Blades Checking for Bent Blades 1. Inspect the cutting edges (Fig 11). If the edges are not sharp or have nicks, remove and sharpen the blades. Refer to Sharpening the Blades on page 12. 1. Rotate the blades until the ends face forward and backward (Fig. 12). Measure from a level surface to the cutting edge of the blades (Fig. 13). Note this dimension. 2. Inspect the blades, especially the curved area (Fig. 11).
Maintenance Removing the Blades Sharpening the Blades Blades must be replaced if a solid object is hit, if the blade is out of balance or is bent. To ensure optimum performance and continued safety conformance of the machine, use genuine TORO replacement blades. Replacement blades made by other manufacturers may result in non-conformance with safety standards. 1. Use a file to sharpen the cutting edge at both ends of the blade (Fig. 15). Maintain the original angle.
Maintenance Correcting Cutting Unit Mismatch Setting the Front-to-Rear Pitch If one cutter blade cuts lower than the other, correct as follows: 2. Position the blades front-to-rear (Fig. 17). Measure at C and D locations (Fig. 17) from a level surface to the cutting edge of the blades (Fig. 18). 1. Stop the engine, remove the key and disconnect the spark plug wire(s) from the spark plug(s). 2. Adjust the tire pressure in all tires to specifications and check that the blades are not bent.
Maintenance 4. To change the front-to-rear pitch, move an equal number of thrust washers on both castor wheel forks. Move the thrust washers from the top of the carrier frame mounting tube to the bottom to raise the front of the mower. Move the thrust washers from the bottom of the mounting tube to the top to lower the front of the mower (Fig. 19). Setting the Side-to-Side Leveling 5. Check the side-to-side leveling of the cutting unit. 3.
Maintenance Greasing the Bearings and Bushings 4. Disconnect the idler arm spring to relieve tension on the idler arm and idler pulley, then remove the worn deck belt (Fig. 23). The cutting unit must be lubricated regularly. Refer to the Service Interval Chart on page 10. Grease with No. 2 general purpose lithium base or molybdenum base grease. 5. Install the new deck belt around the two outboard spindle pulleys, the idler pulley, and in the lower groove of the center spindle pulley (Fig. 23). 1.
Maintenance Replacing the Drive Belt Squealing when the belt is rotating, blades slipping when cutting grass, frayed belt edges, burn marks and cracks are signs of a worn drive belt. Replace the drive belt if any of these conditions are evident. 6. Tighten the jam nuts on the adjusting shafts until the springs are compressed to a length of 5 inch (12.7 cm) (Fig 26). 2 1. Stop the engine, remove the key and disconnect the spark plug wire(s) from the spark plug(s). 2.
Maintenance Replacing the Castor Wheel Fork Bushings 4. Insert a pin punch into the mounting tube and carefully drive out the bushings (Fig. 28). Clean the inside of the mounting tube. The castor wheel forks are mounted in bushings pressed into the top and bottom of the carrier frame mounting tubes. To check the bushings, move the castor forks back and forth and side-to-side. If a castor fork is loose, the bushings are worn and must be replaced. 5. Grease the inside and outside of the new bushings.
Maintenance Servicing the Castor Wheels and Bearings Replacing the Grass Deflector Warning The castor wheels rotate on a roller bearing supported by a spanner bushing. If the bearing is kept well lubricated, wear will be minimal. Failure to keep the bearing well lubricated will cause rapid wear. A wobbly castor wheel usually indicates a worn bearing. An uncovered discharge opening could allow the lawn mower to throw objects in the operator’s or bystander’s direction and result in serious injury.
Maintenance Storage 1. Clean any dirt and chaff from the top of the mower. 2. Scrape any heavy buildup of grass and dirt from the underside of the mower, then wash the mower with a garden hose. 3. Check the condition of the blades. Refer to Cutting Blades on page 10. 4. Check the condition of the drive and deck belts. 5. Check and tighten all bolts, nuts and screws. Repair or replace any part that is damaged or defective. 6. Paint all scratched or bare metal surfaces.
Troubleshooting PROBLEM Abnormal vibration. Uneven cutting g height. g Blades do not rotate. 20 POSSIBLE CAUSES CORRECTIVE ACTION 1. Cutting blade(s) is/are bent or unbalanced. 1. Install new cutting blade(s). 2. Blade mounting bolt is loose. 2. Tighten blade mounting bolt. 3. Engine mounting bolts are loose. 3. Tighten engine mounting bolts. 4. Loose engine pulley, idler pulley, or blade pulley. 4. Tighten the appropriate pulley. 5. Engine pulley is damaged. 5.
