Toro 78231 User manual

Operator’s Manual
IMPORTANT: Read this manual carefully. It contains information about your
safety and the safety of others. Also become familiar with the controls and
their proper use before you operate the product.
FORM NO. 3319–559 Rev A
Wheel Horse
42” Mower
for
Lawn and Garden Tractors
Model No. 78231 – 8900001 & Up

Printed in USA
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. You will find the model and serial
number plate located in a unique place on the product as
shown below.
1
1275
1. Modeland Serial Number Plate
For your convenience, write the product model and serial
numbers in the space below.
Model No:
Serial No.
The warning system in this manual identifies potential
hazards and has special safety messages that help you and
others avoid personal injury, even death. DANGER,
WARNING and CAUTION are signal words used to
identify the level of hazard. However, regardless of the
hazard, be extremely careful.
DANGER signals an extreme hazard that will cause
serious injury or death if the recommended precautions
are not followed.
WARNING signals a hazard that may cause serious injury
or death if the recommended precautions are not followed.
CAUTION signals a hazard that may cause minor or
moderate injury if the recommended precautions are not
followed.
Two other words are also used to highlight information.
“Important” calls attention to special mechanical
information and “Note” emphasizes general information
worthy of special attention.
The left and right side of the machine is determined by
sitting on the seat in the normal operator’s position.

1
Contents
Page
Safety and Instruction Decals 2. . . . . . . . . . . . . . . . . .
Assembly 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loose Parts 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing Discharge Chute 4. . . . . . . . . . . . . . . . . .
Install Rear and Adjustable Links 5. . . . . . . . . . . .
Installing the Mower 5. . . . . . . . . . . . . . . . . . . . . .
Transport Height Adjustment 6. . . . . . . . . . . . . . .
Side-to-Side Mower Leveling 7. . . . . . . . . . . . . . .
Front-to-Rear Blade Slope 8. . . . . . . . . . . . . . . . . .
Removing the Mower 9. . . . . . . . . . . . . . . . . . . . .
Operation 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Side Discharge 10. . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating the Power Take Off (PTO) 10. . . . . . . . .
Page
Attachment Lift Lever 11. . . . . . . . . . . . . . . . . . . . .
Attachment Power Lift 11. . . . . . . . . . . . . . . . . . . . .
Adjusting Dial-A-Height 12. . . . . . . . . . . . . . . . . . .
Adjusting Anti-Scalp Rollers 12. . . . . . . . . . . . . . . .
Tips for Mowing Grass 13. . . . . . . . . . . . . . . . . . . .
Maintenance 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Interval Chart 14. . . . . . . . . . . . . . . . . . . . .
Cutting Blade 15. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Greasing and Lubrication 17. . . . . . . . . . . . . . . . . . .
Blade Drive Belt 17. . . . . . . . . . . . . . . . . . . . . . . . .
Storage 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Safety
2
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.
ON GRASS DEFLECTOR
(Part No. 93–1122)
ON MOWER RIGHT SIDE
(Part No. 116286)
ON MOWER LEFT AND
RIGHT SIDES
(Part No. 92–7108)

3
Assembly
Loose Parts
Note: Use the chart below to identify parts used for assembly.
DESCRIPTION QTY. USE
Grass deflector
Torsion spring
Washer (1/2”)
Cotter pin (3/4”)
Plastic washer
Rubber bushing
Jam nut (3/8”–16)
1
1
1
1
2
1
1
Install grass deflector
Rear link
Washer (1/2”)
Cotter pin (1”)
Hairpin cotter (2–9/16”)
1
2
1
2
Install rear link
Adjustable link
Washer (1/2”)
Cotter pin (1”)
Hairpin cotter (2–9/16”)
1
2
1
1
Install front link to mower
V belt
Hairpin cotter (3–3/8”)
Washer (3/4”)
1
2
2Install mower to tractor
Operator’s Manual 1Read before operating