Toro 31974 Operator'S Manual Download Page 2

This product complies with all relevant European
directives. For details, please see the Declaration of
Incorporation (DOI) at the back of this publication.

Introduction

This rotary-blade lawn cutting unit is mounted to
a ride-on machine and is intended to be used
by professional, hired operators in commercial
applications. It is primarily designed for cutting grass
on well-maintained lawns in parks, sports fields,
and on commercial grounds. Using this product for
purposes other than its intended use could prove
dangerous to you and bystanders.

Read this information carefully to learn how to operate
and maintain your product properly and to avoid
injury and product damage. You are responsible for
operating the product properly and safely.

Visit

www.Toro.com

for product safety and operation

training materials, accessory information, help finding
a dealer, or to register your product.

Whenever you need service, genuine Toro parts, or
additional information, contact an Authorized Service
Dealer or Toro Customer Service and have the model
and serial numbers of your product ready.

Figure 1

identifies the location of the model and serial numbers
on the product. Write the numbers in the space
provided.

Important:

With your mobile device, you can

scan the QR code on the serial number decal (if
equipped) to access warranty, parts, and other
product information.

g296997

Figure 1

1.

Model and serial number location

Model No.

Serial No.

This manual identifies potential hazards and has
safety messages identified by the safety-alert symbol
(

Figure 2

), which signals a hazard that may cause

serious injury or death if you do not follow the
recommended precautions.

g000502

Figure 2

1.

Safety-alert symbol

This manual uses 2 words to highlight information.

Important

calls attention to special mechanical

information and

Note

emphasizes general information

worthy of special attention.

© 2020—The Toro® Company
8111 Lyndale Avenue South
Bloomington, MN 55420

2

Contact us at www.Toro.com.

Printed in the USA

All Rights Reserved

 

Summary of Contents for 31974

Page 1: ...or 72in Rear Discharge Rotary Mower Groundsmaster 3200 or 3300 Series Traction Unit Model No 31974 Serial No 400000000 and Up Model No 31975 Serial No 400000000 and Up Register at www Toro com Origin...

Page 2: ...service genuine Toro parts or additional information contact an Authorized Service Dealer or Toro Customer Service and have the model and serial numbers of your product ready Figure 1 identifies the...

Page 3: ...this Operator s Manual before starting the machine Use your full attention while operating the machine Do not engage in any activity that causes distractions otherwise injury or property damage may o...

Page 4: ...2 Add SAE 80w 90 API GL 5 oil every 50 hours decal116 8283 116 8283 1 Warning read the Operator s Manual for instructions on torquing the blade bolt nut to 75 to 81 N m 55 to 60 ft lb decal117 4979 1...

Page 5: ...Height of cut 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 shi...

Page 6: ...decal137 5949 137 5949 1 Height of cut 2 Mounting holes 6...

Page 7: ...you leave the key in the ignition switch someone could accidentally start the engine and seriously injure you or other bystanders Remove the key from the ignition switch before you do any maintenance...

Page 8: ...move the lift arms to the lowest position engage the parking brake shut off the engine and remove the key 2 Position the cutting unit in front of the traction unit 3 Slide the PTO shaft yoke onto the...

Page 9: ...justing the Height of Cut page 11 4 Installing the PTO Cover Parts needed for this procedure 2 Shoulder bolt 2 Spacer Procedure Use 2 shoulder bolts and 2 spacers to secure the PTO cover to the gearbo...

Page 10: ...change without notice Width of Cut Model No 31974 1 52 m 60 inches Model No 31975 1 82 m 72 inches Height of Cut Adjustable from 25 to 152 mm 1 to 6 inches in 13 mm 1 2 inch increments Net Weight Mode...

Page 11: ...to position the lift arm chains refer to Positioning the Height of Cut Chain page 12 Positioning the Castor Wheel Axles Position the castor wheel axles in the same holes in both castor forks Refer to...

Page 12: ...justing the Cutting Unit Pitch A blade pitch of 6 to 9 5 mm 1 4 to 3 8 inch is recommended i e the back of the blade plane is 6 to 9 5 mm 1 4 to 3 8 inch higher than the front A pitch larger than 9 5...

Page 13: ...to determine if all cutting units are cutting at the same height 6 If cutting unit adjustments are still needed find a flat surface using a 2 m 6 ft or longer straight edge 7 To ease measuring blade...

Page 14: ...than the usual setting and cut the grass Then cut the grass again using the lower normal setting Keep the Cutting Unit Clean Clean clippings and dirt from the underside of the cutting unit after each...

Page 15: ...box lubricant Tighten the castor wheel nuts Check the blade drive belt adjustment Clean under the cutting unit belt covers Every 100 hours Check the PTO driveshaft to gearbox fastener torque Every 400...

Page 16: ...mes with lubricant from the factory check the level before operating the cutting unit The gearbox capacity is 283 ml 15 fl oz 1 Park the machine on a level surface lower the cutting unit engage the pa...

Page 17: ...e shut off the engine and remove the key 4 Remove the bolts and washers that secure the lift arms to the castor arms g296375 Figure 19 1 Lift arm 3 Washer 2 Castor arm 4 Bolt 5 Remove the bolts and nu...

Page 18: ...or spindle for wear and replace it if damaged 7 Push the castor spindle through the bushings and mounting tube slide the thrust washer and spacer s onto the spindle and install the tensioning cap on t...

Page 19: ...3 Note The difference between the dimensions obtained in steps 3 and 4 must not exceed 3 mm 1 8 inch If the dimension exceeds 3 mm 1 8 inch the blade is bent and must be replaced refer to Removing an...

Page 20: ...Remove the blades and sharpen them on a grinder After sharpening the cutting edges install the blade refer to Removing and Installing the Cutting Unit Blade s page 19 Checking and Correcting Mismatch...

Page 21: ...lace the belt if any of these conditions occur 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 Remove the belt covers fro...

Page 22: ...special attention to these areas Underneath the cutting unit Under the cutting unit belt covers PTO shaft assembly All grease fittings and pivot points 5 Remove sharpen and balance the cutting unit b...

Page 23: ...Notes...

Page 24: ...Notes...

Page 25: ...Notes...

Page 26: ...6 42 EC 2000 14 EC Relevant technical documentation has been compiled as required per Part B of Annex VII of 2006 42 EC We will undertake to transmit in response to requests by national authorities re...

Page 27: ...for marketing purposes Retention of your Personal Information Toro will keep your personal information as long as it is relevant for the above purposes and in accordance with legal requirements For mo...

Page 28: ...ion of the original product warranty and become the property of Toro Toro will make the final decision whether to repair any existing part or assembly or replace it Toro may use remanufactured parts f...

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