Form No. 3425-836 Rev A 72in Mower Groundsmaster® 3280-D Traction Unit Model No. 31335—Serial No. 403370001 and Up Model No. 31336—Serial No. 403370001 and Up Register at www.Toro.com.
This product complies with all relevant European directives. For details, please see the Declaration of Incorporation (DOI) at the back of this publication. WARNING CALIFORNIA Proposition 65 Warning Use of this product may cause exposure to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. g243406 Figure 1 Introduction Model No.
Contents Safety ....................................................................... 4 General Safety ................................................... 4 Cutting Unit Safety.............................................. 4 Safety and Instructional Decals .......................... 5 Setup ........................................................................ 7 1 Securing the Grass Deflector ........................... 8 2 Installing the Lift Arms to the Traction Unit ..................................
Safety attachment after striking an object or if there is an abnormal vibration in the machine. Make all necessary repairs before resuming operation. This machine has been designed in accordance with EN ISO 5395:2013 and ANSI B71.4-2017. • Keep all parts in good working condition and all General Safety • Use only accessories, attachments, and hardware tightened. Replace all worn or damaged decals. replacement parts approved by Toro.
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. decal93-6697 93-6697 1. Read the Operator's Manual. 2. Add SAE 80w-90 (API GL-5) oil every 50 hours. decal107-1622 107-1622 Model 31336 only decal93-7818 93-7818 1. Warning—read the Operator's Manual for instructions on torquing the blade bolt/nut to 115 to 149 N∙m (85 to 110 ft-lb).
decal108-1988 108-1988 1. Belt routing decal120-6604 120-6604 1. Thrown object hazard—keep bystanders away from the machine. 2. Cutting/dismemberment hazard of hand, mower blade—stay away from moving parts, keep all guards and shields in place. 3. Cutting/dismemberment hazard of foot, mower blade—stay away from moving parts, keep all guards and shields in place. decal115-4505 115-4505 1. Warning—read the Operator's Manual. 2. Tipping hazard—lower the cutting unit when driving down slopes.
Setup Loose Parts Use the chart below to verify that all parts have been shipped. Procedure Description 1 2 3 4 5 Use Qty. No parts required – Secure the grass deflector. Right lift arm Left lift arm 1 1 Install the lift arms to the traction unit. No parts required – Connect the lift arms to the cutting unit. No parts required – Connect the PTO shaft to the cutting unit gearbox. No parts required – Grease the machine. Media and Additional Parts Description Use Qty.
Important: If the 72-inch Side-Discharge Cutting Unit (Model 31336) is being mounted to a Model 30307, 30308, 30309, 30343, 30344 or 30345 traction unit with a serial number prior to 311000301, install the Cutting Unit Alignment Kit (Part No. 120-6599) to mounting the cutting unit to the traction unit. 1 Securing the Grass Deflector g018264 Figure 3 Model 31336 Only No Parts Required 1. Grass deflector 4. Place the left J-hook end of the spring behind the cutting unit edge. 2. Spring 5.
7. Hook the brake return spring to the tab on the lift arm (Figure 4). g012393 Figure 4 1. Pivot pin 4. Brake return spring 2. Lift arm 3. Pivot bracket 5. Tab 8. Install the wheel and tire assembly. Torque the wheel nuts to 102 to 108 N∙m (75 to 80 ft-lb). 9. Repeat the procedure on the opposite side of the machine. g018216 Figure 5 3 1. Castor arm bracket 2. Hairpin cotter 3. Clevis pin Connecting the Lift Arms to the Cutting Unit 4.
4 5 Connecting the PTO Shaft Greasing the Machine to the Cutting Unit Gearbox No Parts Required No Parts Required Procedure Procedure Before operating the machine, it must be greased to ensure proper lubricating characteristics; refer to Lubrication (page 19). Failure to properly grease the machine will result in premature failure of critical parts. WARNING If the engine is started and the PTO driveshaft is allowed to rotate, serious personal injury and machine damage could result.
Product Overview Operation Specifications Note: Determine the left and right sides of the machine from the normal operating position. Note: Specifications and design are subject to CAUTION change without notice. Width of Cut 1.
Adjusting the Height of Cut detected, reverse the machines direction to pull any clippings away from the wheel/fork area. The height-of-cut is adjustable from 25 to 127 mm (1 to 5 inches) in 13 mm (1/2 inch) increments. To adjust the height-of-cut, position the castor wheel axles in the upper or lower holes of the castor forks and add or remove an equal number of spacers from the castor forks. 1. Start the engine and raise the cutting unit off the floor so that the height-of-cut can be changed.
Note: The rear castor fork assembly does not need to be removed from the castor arm to change the height of cut. 2. Remove or add C-shaped spacers at the narrow portion of the spindle shaft, below the castor arm, to get the desired height of cut. Ensure that the shims, not the spacers, contact the top and bottom of the castor arm. 3. Install the tensioning cap to secure the assembly. 4. Ensure that all four castor wheels are set at the same height of cut.
2. Select a hole so that the anti-scalp roller is positioned to the nearest corresponding height of cut desired. 3. Install the flange nut, bushing, spacer, and bolt. Torque to 54 to 61 N∙m (40 to 45 ft-lb) (Figure 13). Adjusting the Flow Baffle Model 31336 Only You can adjust the mower discharge flow for different types of mowing conditions. Position the cam locks and baffle to give the best quality of cut. g268888 Figure 12 1. Screw 2. Flange-head bolt 6. 3. Skid 4.
Position A This is the full rear position. The suggested use for this position is a follows: • Use for short, light grass mowing conditions • Use in dry conditions • For smaller grass clippings • Propels grass clippings farther away from the mower g016478 Figure 17 Adjusting the Cutting Unit Pitch Cutting unit pitch is the difference in height-of-cut from the front of the blade plane to the back of the blade plane. Use a blade pitch of 8 mm (5/16 inch).
9. Rotate the blade on each spindle until the ends face forward and backward. 10. Measure from the floor to the front tip of the cutting edge. 11. Adjust the shims on the castor fork(s) to match the height of cut to the decal; refer to Front Castor Wheels (page 12). Using the Side Discharge Model 31336 Only The mower has a hinged grass deflector that disperses clippings to the side and down toward the turf.
Operating Tips inside the cutting unit, cutting quality will eventually become unsatisfactory. Fast Throttle Setting/Ground Speed To reduce the risk of fire hazard, keep the engine, muffler, battery compartment, parking brake, cutting units, and fuel storage compartment free of grass, leaves, or excessive grease. Clean up any spilled oil or fuel. To maintain enough power for the machine and deck while mowing, operate the engine at the fast throttle position and adjust your ground speed for conditions.
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 2 hours • Tighten the castor wheel nuts. After the first 10 hours • Tighten the castor wheel nuts. • Torque the blade bolts. Before each use or daily • Lubricate the castor arm bushings. • Lubricate the castor wheel bearings. • Check the blades. After each use • Clean the cutting unit.
CAUTION 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 do any maintenance. Important: The fasteners on the covers of this machine are designed to remain on the cover after removal. Loosen all the fasteners on each cover a few turns so that the cover is loose but still attached, then go back and loosen them until the cover comes free.
2. Remove the dipstick/fill plug from the top of the gearbox (Figure 23) and ensure that the lubricant is between the marks on the dipstick. If the lubricant level is low, add enough lubricant until the level is between the marks. g012237 Figure 24 1. Lift arm 3. Hairpin cotter 2. Clevis pin 4. Castor arm bracket 3. Roll the cutting unit away from the traction unit, separating the male and female sections of the PTO shaft (Figure 25). g010548 Figure 23 1.
4. 5. Press the lift switch forward to the FLOAT position. Push a lift arm down until the holes in the lift arm line up with the holes in the castor arm bracket and you can insert the height-of-cut rod into the lift arm pads (Figure 26). Secure the lift arm to the castor arm with 2 thrust washers, a clevis pin, and a hairpin cotter, position the thrust washers between the lift arm and the castor arm bracket (Figure 26), and insert end of cotter pin into the slot in the castor arm tab to retain cotter pin.
Checking for a Bent Blade 1. Position the machine on a level surface. Raise the cutting unit, engage the parking brake, put the traction pedal in neutral, put the PTO lever in the OFF position, shut off the engine, and remove the ignition key. Block the cutting unit to prevent it from accidentally falling. 2. Rotate the blade until the ends face forward and backward. Measure from the inside of the cutting unit to the cutting edge at the front of the blade (Figure 29), and remember this dimension.
the grass is cut rather than torn. A dull cutting edge is evident when the tips of the grass appear brown and shredded. Sharpen the cutting edges to correct this condition. 1. Park the machine on a level surface. Raise the cutting unit, engage the parking brake, put the traction pedal in neutral, put the PTO lever in the OFF position, shut off the engine, and remove the key. 2. Examine the cutting ends of the blade carefully, especially where the flat and curved parts of the blade meet (Figure 31).
g000276 Figure 32 1. Sharpen at original angle g012239 Figure 34 Note: Remove the blades and sharpen them on a grinder; refer to Removing the Cutting Blades. After sharpening the cutting edges, install the blade with the anti-scalp cup and blade bolt. The blade sails must be on top of the blade. Tighten the blade bolt to 115 to 149 N·m (85 to 110 ft-lb). 1. Gearbox 3. Remove the old belt from around the spindle pulleys and idler pulley. 4.
2. (Figure 36). Remove the damaged or worn grass deflector. 4. Use a jack to raise the front of the machine and support it with jack stands. Place the spacer and spring onto grass deflector. Place the L-end of the spring behind the cutting unit edge. 5. Thoroughly clean the underside of the cutting unit with water. Note: Ensure that the L-end of the spring is installed behind the cutting unit edge before installing the bolt as shown in Figure 36. 3. Install the bolt and nut.
Storage 1. Disengage the PTO, release the traction pedal to the neutral position, lower the cutting unit, move the throttle lever to the SLOW positionand, and engage the parking brake. 2. Always shut off the engine, and remove the key. Wait for all movement to stop and allow the machine to cool before adjusting, cleaning, storing, or repairing it. 3.
Notes:
Notes:
Notes:
Declaration of Incorporation The Toro Company, 8111 Lyndale Ave. South, Bloomington, MN, USA declares that the following unit(s) conform(s) to the directives listed, when installed in accordance with the accompanying instructions onto certain Toro models as indicated on the relevant Declarations of Conformity. Model No. Serial No.
California Proposition 65 Warning Information What is this warning? You may see a product for sale that has a warning label like the following: WARNING: Cancer and Reproductive Harm—www.p65Warnings.ca.gov. What is Prop 65? Prop 65 applies to any company operating in California, selling products in California, or manufacturing products that may be sold in or brought into California.
The Toro Warranty A Two-Year Limited Warranty Conditions and Products Covered The Toro Company and its affiliate, Toro Warranty Company, pursuant to an agreement between them, jointly warrant your Toro Commercial product (“Product”) to be free from defects in materials or workmanship for two years or 1500 operational hours*, whichever occurs first. This warranty is applicable to all products with the exception of Aerators (refer to separate warranty statements for these products).
