Toro 78261 Manuel utilisateur

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. 3322–353

Wheel

Horse



48” Mower

for

Lawn and Garden T

ractors

Model No. 78261 – 9900001 & 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

1275

1. Model

and 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.

Contents

Page

Safety and Instruction Decals 2.

. . . . . . . . . . . . .

Assembly 3

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Loose Parts 3

. . . . . . . . . . . . . . . . . . . . . . . . .

Installing Dischar

ge Chute

. . . . . . . . . . . . .

Install Rear and Adjustable Links 5

. . . . . . .

Installing the Mower 5

. . . . . . . . . . . . . . . . .

Transport Height Adjustment 7

. . . . . . . . . . .

Side-to-Side Mower Leveling 7

. . . . . . . . . .

Front-to-Rear Blade Slope 8

. . . . . . . . . . . . .

Removing the Mower 9

. . . . . . . . . . . . . . . . .

Operation 11

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Side Discharge 11

. . . . . . . . . . . . . . . . . . . . . .

Operating thePower Take Off (PTO) 11

. . . . .

Attachment Lift Lever 12

. . . . . . . . . . . . . . . .

Page

Attachment Power Lift 12

. . . . . . . . . . . . . . . .

Adjusting Dial-A-Height 13

. . . . . . . . . . . . . .

Adjusting Center Anti-Scalp Roller 13

. . . . . .

Adjusting Outer Anti–Scalp Wheels 14

. . . . .

Tips for Mowing Grass 14

. . . . . . . . . . . . . . .

Maintenance 16

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Service Interval Chart 16

. . . . . . . . . . . . . . . .

Cutting Blade

. . . . . . . . . . . . . . . . . . . . . . .

Greasing and Lubrication 19

. . . . . . . . . . . . . .

Blade Drive Belt 19

. . . . . . . . . . . . . . . . . . . . .

Washing the Underside of the Mower 20

. . . .

Storage 21

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Troubleshooting 22

. . . . . . . . . . . . . . . . . . . . . . . . .

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 DISCHARGE CHUTE

(Part No. 93–1

122)

ON MOWER RIGHT SIDE

(Part No. 1

16286)

ON MOWER LEFT AND

RIGHT SIDES

(Part No. 92–7108)

NEXT T

O GAGE WHEELS

(Part No. 68–3380)

Assembly

Loose

Parts

Note: Use the chart below to identify parts used for assembly.

DESCRIPTION QTY. USE

Discharge chute

orsion spring

Washer (1/2”)

Cotter pin (3/4”)

Plastic washer

Rubber bushing

Jam nut (3/8”–16)

Install discharge chute

Rear link

Washer (1/2”)

Cotter pin (1”)

Hairpin cotter (2–9/16”)

Install rear link

Adjustable link

Washer (1/2”)

Cotter pin (1”)

Hairpin cotter (2–9/16”)

Install front link to mower

V belt

Hairpin cotter (3–3/8”)

Washer (3/4”)

Install mower to tractor

Operator’

s Manual

Read before operating

Assembly

Installing

Discharge Chute

1. Locate items shown in Fig. 1.

2. Place the short end of the spring into the small

hole in the discharge chute.

3. Position spring and discharge chute over post on

rear of deck and secure with 1/2” washer and

3/4” cotter pin (Fig. 1).

4. Slide rubber bushing and plastic washer over

stud at front of mower.

Place dischar

ge chute over stud and secure with

second plastic washer and 3/8” jam nut (Fig. 1).

6

Figure 1

1. Grass

deflector

2. Spring

Cotter pin 3/4”

4. W

asher 1/2”

Rubber bushing

Plastic washer

Jam nut 3/8”

IMPORTANT: Discharge chute must be

spring loaded in the down position. Lift chute

up to test that it snaps to the full down

position.

POTENTIAL HAZARD

•Without the discharge chute or the

complete grass catcher assembly mounted

in place, you and others are exposed to

blade contact and thrown debris.

WHAT CAN HAPPEN

•Contact with rotating mower blade(s) and

thrown debris will cause injury or death.

HOW TO AV

OID THE HAZARD

•

NEVER r

emove the discharge chute from

the mower because the discharge chute

routes material down toward the turf. If the

discharge chute is ever damaged, replace it

immediately.

•Never put your hands or feet under the

mower.

•Never try to clear discharge area or mower

blades unless you move the power take off

(PTO) to “OFF” and rotate the ignition key

to “OFF.” Also remove the ignition key and

pull the wire off the spark plug(s).

Assembly

Install

Rear and Adjustable

Links

1. Install rear link to center wheel shaft bracket

with 1/2” washer and 1” cotter pin (Fig. 2).

m–2809

Figure 2

1. Rear

link

2. W

asher 1/2”

Cotter pin 1”

Attachment lift

Hairpin cotter 2–9/16”

2. Install both front adjustable links to mower

bracket with (2) 1/2” washers and (2) 1” cotter

pins (Fig. 3).

m–4244

Figure 3

1. Adjustable

link

2. W

asher 1/2”

Cotter pin 1”

Attachment lift

Hairpin cotter 2–9/16”

Installing

the Mower

1. Park the tractor on a flat surface, disengage the

power take off (PTO), set the parking brake, and

turn the ignition key to “OFF” to stop the

engine. Remove the ignition key.

2. Turn the front wheels fully to the left and raise

attachment lift lever all the way to the latched

position; refer to tractor Operator’

s Manual.

3. Slide the mower under the chassis from the right

side (Fig. 4) and align rear mounting bushings

with ends of lift arms.

4. Straighten the front wheels, turn Dial-A-Height

knob counterclockwise, all the way, and lower

the attachment lift lever to the mounting

position; refer to tractor Operator’

s Manual.

5. Place rear guide bushings, first left side then

right, onto lift arms then slide deck left into

position (Fig. 4).

6. Secure deck to rear lift arms with (2) 3/4”

washers and (2) 3–3/8” hairpin cotters (Fig. 4).

m–3619

Figure 4

1. Lift

arm

2. W

asher 3/4”

Hair pin cotter 3–3/8”

Rear link

Attachment lift

Assembly

7. Attach rear link to attachment lift with 1/2”

washer and 2–9/16” hairpin cotter (Fig. 2 & 4).

8. Install both front adjustable links to front lift

arms with (2) 1/2” washers and (2) 2–9/16”

hairpin cotters (Fig. 3 & 5).

m–4246

Figure 5

1. Adjustable

link

2. Washer 3.

Hairpin cotter

9. Rotate tension lever counterclockwise to relax

spring and install mower drive belt in engine

drive pulley (Fig. 6).

10. Rotate lever clockwise to tension spring and belt

(Fig. 6).

Note: Make sure belt is properly located in

engine and deck pulleys and around

idler pulley.

m–3621

Figure 6

op V

iew

1. Mower

belt

2. T

ension lever

Idler pulley

11. Check mower level; refer to Side-to-Side Mower

Leveling page 7, and Front-to-Rear Blade

Slope page 8.

12. Raise attachment lift lever all the way to the

latched position and adjust mower height-of-cut;

refer to page 12 and transport height adjustment;

refer to page 7.

Assembly

Transport

Height Adjustment

Transport height is set at the factory and should not

need adjustment; however, if the belt covers contact

the footrest in the raised position, adjustment is

required.

1. Adjust by turning transport height nut (Fig. 7) on

lift mechanism clockwise to raise or

counterclockwise to lower mower.

2. Adjust nut until there is 1/16–1/8 inch clearance

between belt cover and left footrest.

1223

Figure 7

1. Nut

Side-to-Side

Mower Leveling

The mower blades must be level from side to side.

Check the side-to-side level any time you install the

mower or when you see an uneven cut on your lawn.

Before you level the mower, set the air pressure in the

front and rear tires as specified in the tractor

operator’s manual.

2-3/4” to 4” Height-of-Cut Range

When the mower height-of-cut is set to the 2-3/4” to

4” range, the mower is suspended from the tractor.

1. Park the tractor on a flat surface, disengage the

power take off (PTO), set the parking brake, and

turn the ignition key to “OFF” to stop the

engine. Remove the ignition key.

2. Raise attachment lift lever all the way to the

latched position.

3. Carefully rotate blade(s) side to side (Fig. 8).

Measure between the outside cutting edges and

the flat surface (Fig. 8). If both measurements

are not within 3/16”, an adjustment is required;

refer to steps 4 and 6.

Front

Figure 8

1. Blades

side to side

Outside cutting edges

Measure here

4. Loosen adjustment bolt on one side and rotate

hanger bracket to raise or lower mower (Fig. 9).

5. After adjusting, tighten bolt and check

side-to-side level.

Assembly

IMPORTANT: If hanger is rotated to the end

of adjustment on one side and mower is not

level, adjust the opposite side.

1224

Figure 9

1. Bolt 2. Hanger

bracket

6. Now check the front-to-rear blade slope; refer to

Front-to-Rear Blade Slope, page 8.

7. Check that both links have equal tension.

3/4” to 2-3/4” Height-of-Cut Range

When the mower height-of-cut is set to the 3/4” to

2-3/4” range the rear gage wheels contact the ground.

There is no side-to-side adjustment for this height

range, see Front-to-Rear Blade Slope.

Front-to-Rear

Blade Slope

Check the front-to-rear blade slope any time you

install the mower. Before checking the slope, set air

pressure in the front and rear tires as specified in the

tractor operator’s manual. If the front blade tip is not

0–3/8” lower than the rear blade tip, adjust the blade

slope using the following instructions:

1. Park the tractor on a flat surface, disengage the

power take off (PTO), set the parking brake, and

turn the ignition key to “OFF” to stop the

engine. Remove the ignition key.

2. Check and adjust side-to-side blade level if you

have not checked the setting; refer to

Side-to-Side Mower Leveling, page 7.

3. Adjust the Dial-A-Height knob so the

height-of-cut is in the middle of the range and

lower attachment lift.

4. Carefully rotate blades so they are facing front

and rear (Fig. 10).

5. Measure from the tip of the front blade (Fig. 10).

and the tip of the rearward blades to a flat

surface. If the front blade tip is not 0–3/8” lower

than the rear blade tips adjust front adjustment

links.

Front 1078

Figure 10

1. Blade

front to rear

Measure front blade tip

Measure rear blade tip

Measure here

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