Form No. 3440-524 Rev A 60in or 72in Side Discharge Rotary Mower Groundsmaster® 3200 or 3300 Series Traction Unit Model No. 31970—Serial No. 400000000 and Up Model No. 31972—Serial No. 400000000 and Up Register at www.Toro.com.
This product complies with all relevant European directives, for details please see the separate product specific Declaration of Conformity (DOC) sheet. 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. Introduction g294594 Figure 1 1.
Contents Safety Safety ....................................................................... 3 General Safety ................................................... 3 Cutting Unit Safety.............................................. 3 Safety and Instructional Decals .......................... 4 Setup ........................................................................ 8 1 Preparing the Machine..................................... 9 2 Installing the CE Kit..........................................
• Keep all parts in good working condition and all hardware tightened. Replace all worn or damaged decals. • Use only accessories, attachments, and 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. decal93-7818 93-7818 1.
decal127-0326 127-0326 decal137-5945 137-5945 3. Remove the key and read the Operator's Manual before performing maintenance. 1. Read the Operator's Manual. 1. Height of cut (inches/millimeters) 2. Height of cut decal137-5946 137-5946 1. Height of cut (inches/millimeters) decal131-1180 131-1180 1. Read the Operator's Manual. 2. Short, light grass; dry conditions 3. Bagging setting 4. Tall, dense grass; wet conditions decal137-5947 137-5947 1.
decal140-3073 140-3073 decal137-5948 137-5948 1. Height of cut (inches/millimeters) decal138-7359 138-7359 1. Grease every 50 hours. 2. Belt routing decal139-6303 139-6303 1. Entanglement hazard—read the Operator’s Manual; stay away from moving parts; keep all guards and shields in place. 6 1. Thrown object hazard—keep bystanders away. 3. Cutting/dismemberment hazard of hand or foot, mower blade—stay away from moving parts. 2.
decal137-5949 137-5949 2. Mounting holes 1.
Setup Loose Parts Use the chart below to verify that all parts have been shipped. Procedure 1 2 3 4 5 6 Description Use Qty. No parts required – Prepare the machine. No parts required – Install the CE kit (if required). Hex-head bolt Washer Height-of-cut pin Shoulder bolt Spacer 2 2 2 2 2 No parts required – Level the cutting unit. No parts required – Grease the machine. Install the cutting unit to the traction unit. Install the PTO cover.
1 3 Preparing the Machine Installing the Cutting Unit to the Traction Unit No Parts Required Parts needed for this procedure: Procedure 1. Park the machine on a level surface. 2. Engage the parking brake. 3. Shut off the engine and remove the key. 2 Hex-head bolt 2 Washer 2 Height-of-cut pin Procedure 2 Installing the CE Kit If Required (CE-Compliant Countries Only) 1.
If you have previously used the bolts to install the cutting unit: Apply thread-locking compound to the threads of the bolts. g296376 Figure 4 g296657 1. Lift arm 2. Castor arm 8. Figure 5 3. Washer 4. Bolt 1. Shoulder bolt 2. Spacer 3. PTO cover Torque the bolts to the appropriate specification: • If you are using the bolts to install the cutting unit for the first time: 5 Torque the bolts to 256 to 313 N∙m (189 to 231 ft-lb). • If you have previously used the bolts to 9.
Product Overview Specifications Note: Specifications and design are subject to change without notice. g296783 Width of Cut • • Height of Cut Adjustable from 25 to 152 mm (1 to 6 inches) in 13 mm (1/2 inch) increments Net Weight • • Model No. 39190: 1.52 m (60 inches) Model No. 31972: 1.82 m (72 inches) Model No. 31970: 204 kg (450 lb) Model No. 31972: 238 kg (525 lb) Figure 6 1. Jam nuts 3. Height-of-cut chain Attachments/Accessories 2. U-bolt 7.
Operation Note: Determine the left and right sides of the machine from the normal operating position. 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. Adjusting the Height of Cut g008866 Figure 7 The height of cut is adjustable from 25 to 152 mm (1 to 6 inches) in 13 mm (1/2 inch) increments. To adjust the height of cut: 1.
Refer to Figure 8 to determine the combinations of spacers for your desired height-of-cut setting. required power, larger clippings, and a poorer quality of cut. A pitch less than 6 mm (1/4 inch) results in more required power, smaller clippings and a better quality of cut. Note: You may use the shims in any combination above or below the castor-arm hub (as required) to achieve the desired height of cut or cutting-unit level. 3. Push the castor spindle through the castor arm. 4.
Adjusting the Anti-Scalp Rollers Adjusting the Skid Mount the skid in the lower position when operating in height of cuts higher than 64 mm (2-1/2 inches) and in the higher position when operating in height of cuts lower than 64 mm (2-1/2 inches). Whenever you change the height-of-cut, adjust the height of the anti-scalp rollers (Figure 11). 1. Park the machine on a level surface, lower the cutting unit, engage the parking brake, shut off the engine, and remove the key. 2.
Adjusting the Flow Baffle Position B You can adjust the mower-discharge flow for different types of mowing conditions. Position the baffle to give the best quality of cut. Use this position when bagging. Always align it with the blower opening. 1. 2. Position C Park the machine on a level surface, lower the cutting unit, engage the parking brake, shut off the engine, and remove the key. This is the full open position. The suggested use for this position is as follows.
Using the Side Discharge Avoid Cutting Too Low The mower has a hinged grass deflector that disperses clippings to the side and down toward the turf. If the cutting width of the cutting unit is wider than the mower you previously used, raise the cutting height to ensure that uneven turf is not cut too short.
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 • Check the PTO driveshaft-to-gearbox fastener torque. • Tighten the castor wheel nuts. After the first 50 hours • Change the gearbox lubricant. Before each use or daily • Lubricate the castor arm bushings.
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. Greasing the Bearings and Bushings Service Interval: Every 50 hours Lubricate the grease fittings immediately after every washing. The machine has grease fittings that you must lubricate regularly with No. 2 lithium grease. 1. 2.
Checking the Lubricant in the Gearbox Service Interval: Every 50 hours After the first 50 hours Every 400 hours The gearbox in designed to operate on SAE 80-90 weight gear lube. Although the gearbox comes with lubricant from the factory, check the level before operating the cutting unit. The gearbox capacity is 283 ml (15 fl oz). 1. 2. Park the machine on a level surface, lower the cutting unit, engage the parking brake, shut off the engine, and remove the key.
Servicing the Bushings in the Castor Arms The castor arms have bushings pressed into the top and bottom of the tube, and after many hours of operation, the bushings wear. To check the bushings, move the castor fork back and forth and from side to side. If the castor spindle is loose inside the bushings, the bushings are worn; replace them. 1. Park the machine on a level surface, lower the cutting unit, engage the parking brake, shut off the engine, and remove the key. 2.
2. 3. servicing the blades. Only replace or sharpen the blades; never straighten or weld them. Remove the locknut from the bolt holding the castor wheel assembly between the castor fork (Figure 23). Grasp the castor wheel and slide the bolt out of the fork or pivot arm. • On multi-bladed machines, take care as rotating 1 blade can cause other blades to rotate. Remove the bearing from the wheel hub and allow the bearing spacer to fall out (Figure 23).
3. Grasp the end of the blade using a rag or thickly-padded glove. 4. Remove the blade bolt, anti-scalp cup, and blade from the spindle shaft (Figure 25). g004741 Figure 25 1. Blade bolt 5. 2. Anti-scalp cup Install the blade, anti-scalp cup, and blade bolt and tighten the blade bolt to 115 to 149 N∙m (85 to 110 ft-lb). Important: The curved part of the blade must be pointing toward the inside of the cutting unit to ensure proper cutting.
Replacing the Drive Belt Note: Remove the blades and sharpen them on a grinder. After sharpening the cutting edges, install the blade with the anti-scalp cup and blade bolt; refer to Inspecting and Sharpening the Cutting Unit Blade(s) (page 22). The blade drive belt, tensioned by the spring-loaded idler pulley, is very durable. However, after many hours of use, the belt will show signs of wear.
g295042 Figure 29 1. Belt routing g297469 Figure 30 6. Install the belt covers. Replacing the Grass Deflector 1. Bolt 5. Spring installed 2. Spacer 6. Grass deflector 3. Locknut 7. L-end of spring, place behind the cutting unit edge before installing bolt 4. Spring 8. J-hook end of the spring WARNING An uncovered discharge opening allows the machine to throw objects toward you or bystanders, which can result in serious injury. Contact with the blade can also occur.
Storage 1. Park the machine on a level surface, raise the cutting unit to the TRANSPORT position, engage the parking brake, shut off the engine, and remove the key. 2. Thoroughly clean the cutting unit, paying special attention to these areas: • Underneath the cutting unit • Under the cutting unit belt covers • PTO shaft assembly • All grease fittings and pivot points 3. Check and adjust the traction-unit front and rear tire pressure; refer to the traction-unit Operator’s Manual. 4.
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. 31970 with 31957 31972 with 31958 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 Two-Year or 1,500 Hours Limited Warranty Conditions and Products Covered Parts 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 2 years or 1,500 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).
