Toro 78280 Manuale utente

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. 3319-567

Wheel

Horse



52” Mowers

for

Lawn

& Garden T

ractors

Model No. 78280– 8900001 & Up

Model No. 78285– 8900001 & Up

The Toro Company – 1997

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

2371

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.

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

Installation 3

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

Loose Parts 3

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

Mower Preparation 4

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

Tractor Preparation 6

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

Installing the Mower 7

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

Transport Height Adjustment 8

. . . . . . . . . . .

Side-to-Side Mower Leveling 9

. . . . . . . . . .

Front-to-Rear Blade Slope 10

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

Removing the Mower 11

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

Removing RecyclingR Baf

fle 12

. . . . . . . . . .

Installing RecyclingR Baf

fle 12

. . . . . . . . . . .

Operation 13

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

Side Discharge 13

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

Page

Operating the Power Take Off (PTO) 13

. . . .

Attachment Lift Lever 14

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

Attachment Power Lift 14

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

Adjusting Dial-A-Height 15

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

Adjusting Anti-Scalp Wheels 15

. . . . . . . . . .

Tips for Mowing Grass 16

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

Maintenance 17

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

Service Interval Chart 17

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

Cutting Blade

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

Greasing and Lubrication 20

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

Blade Drive Belt 20

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

Power Take Off (PTO) Belt 21

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

Storage 22

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

Troubleshooting 23

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

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 DEFLECT

(Part No. 93–1

122)

ON MOWER REAR CENTER

(Part No. 94–4937)

ON MOWER LEFT AND

DISCHARGE CHUTE

(Part No. 92–7108)

NEXT T

O GAGE WHEELS

(Part No. 93–7282)

ON MOWER LEFT SIDE

(Part No. 94–2543)

UNDER GRASS DEFLECT

(Part No. 92–7109)

Installation

Loose

Parts

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

DESCRIPTION QTY. USE

Gage wheel

Shoulder bolt

Locknut 3/8–24 (with patch on threads)

Install gage wheels

Rear link

Washer 1/2” (13 mm)

Cotter pin 1” (26 mm)

Install rear link

Adjustable links

Washer 3/8” (10 mm)

Cotter pin 1” (26 mm)

Install front mount to mower

Grass deflector

Spring

Bolt 3/8– 24 x 3-1/2” (89 mm)

Locknut 3/8–24

Install grass deflector

Up stop

Install mower up stop

Hairpin cotter 3-3/8” (85 mm)

Washer 3/4” (19 mm)

Link pin

Hairpin cotter2-9/16” (65 mm)

Washer 1/2” (13 mm)

Install mower to tractor

Operator’

s Manual

Warranty card

Read before operating

Installation

Mower

Preparation

1. Attach gage wheels to the outside of arms on

rear carrier assembly. Grease fitting on wheel

must face out (Fig. 1).

2. Secure with shoulder bolt and 3/8” lock nut,

with internal locking patch on threads (Fig. 1).

Note:

Grease wheels.

m–2389

Figure 1

1. Carrier

arm

2. Wheel

Grease fitting out

Shoulder bolt

Lock nut 3/8” (with patch)

3. Install rear link between mower bracket and

carrier lift arm (Fig. 2).

4. Secure with 1/2” washers and 1” (26 mm) cotter

pins (Fig. 2).

m–3388

Figure 2

1. Rear

link

Carrier lift arm

3. W

asher 1/2”

Cotter pin 1” (26 mm)

5. Rotate adjustable links so bolt heads are up and

place between brackets, as shown, on front of the

mower (Fig. 3).

6. Secure to brackets with 1/2” washers and 1”

(26 mm) cotter pins (Fig. 3).

m–3285

Figure 3

1. Adjustable

link

2. Bracket 3. W

asher 1/2”

Cotter pin 1” (26 mm)

Installation

7. Place springs into brackets on mower with

hooked ends over raised back (Fig. 4).

8. Align grass deflector with holes in brackets and

spring straight ends in space under hinge and

above deflector (Fig. 4).

9. Secure deflector to bracket with 3/8–3-1/2 (89

mm) bolts through grass deflector, springs and

brackets. Secure with 3/8” lock nuts (Fig. 4).

10. Lift grass deflector and check that it is spring

loaded and pivots freely to the full down

position.

IMPORTANT: Grass deflector must be

spring loaded in the down position. Lift

deflector up to test that it snaps to the full

down position.

1783

Figure 4

1. Bracket

2. Spring

hook end

space for spring

Grass deflector

Bolt 3/8–3-1/2” (89 mm)

Lock nut 3/8”

POTENTIAL

HAZARD

•Without the grass deflector, discharge

cover, or 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 grass deflector from

the mower because the grass deflector

routes material down toward the turf. If the

grass deflector 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 key and pull the

wire off the spark plug(s).

Installation

Tractor

Preparation

1. Park the machine on a level surface and lower

attachment lift to the full “DOWN” position.

Refer to Operation: Attachment Lift page 14.

Note: Turn Dial-A-Height control to allow

lift to go to full “MOUNTING”

position.

2. Adjust air pressure in tires to recommended

pressure.

3. Adjust transport height nut until bottom of rear

lift arms are approximately 7-1/4” (188 mm)

from the level surface (Fig. 5).



Figure 5

1. Transport

height nut

Rear lift arms

7-1/4” (188 mm)

4. Raise attachment lift to the full “UP” position.

Refer to Operation: Attachment Lift page 14.

5. Remove E-ring, washer and lift link from front

lift arm (Fig. 6).

6. Hold front lift arm up until stop contacts frame

(Fig. 6).

7. Push back hard on lift rod, to raise linkage, and

check location of lift rod compared to mounting

hole location.

8. Adjust length of lift rod, by turning in\out of

trunnion, so end just slides into mounting hole in

front lift arm (Fig. 6).

9. Slide lift rod into hole and secure with

previously removed washer and E-ring (Fig. 6).

10. Check that stop is 0”–1/8” (0–3 mm) away frame

when fully assembled and lift in the full “UP”

position.

2m–3398

Figure 6

1. E-ring

2. Washer

3. Stop

on lift arm

Lift link

5. Trunnion

11. Remove bolts securing existing up-stop to

tractor frame (Fig. 7).

12. Place J-clip, holding drain hose, against frame

and mount new, long, up-stop to frame with

previously removed hardware (Fig. 7).

m–3390

Figure 7

1. Up-stop

(long)

2. J-clip 3.

Existing bolts

Installation

Installing

the Mower

1. Park the machine on a level surface, disengage

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

and turn the ignition key to “OFF” to stop the

engine. Remove the key.

2. Turn the front wheels straight ahead and raise

attachment lift lever all the way to the latched

position; refer to tractor Operator’

s Manual.

3. Slide the mower under tractor from right side,

turning front wheels as necessary. Align rear

mounting bushings with ends of lift arms.

4. Turn Dial-a-Height knob counterclockwise, all

the way, and lower attachment lift lever to the

mounting position; refer to Operation page 15.

5. Place rear guide bushings, first left side then

right, onto lift arms then slide deck left into

position (Fig. 8).

6. Secure deck to rear lift arms with 3/4” washers

and large hairpin cotters (Fig. 8).

7. Install front adjustable links to front lift arms

with 1/2” washer and small hairpin cotter

(Fig. 8).

8. Attach rear link to attachment lift with link pin,

1/2” washer and small hairpin cotter (Fig. 8).

m–2373

Figure 8

1. Lift

arm

2. W

asher 3/4”

Hair pin cotter–large

Attachment lift

5. W

asher 1/2”

Hair pin cotter–small

Link pin

9. Pull on drive belt and rotate onto engine pulley

to install (Fig. 9).

Note: Make sure belt is properly located in

engine and deck pulleys and around

idler pulley.

10. Adjust belt guide so distance between belt and

guide is 1/8” (4 mm) (Fig. 9).

322418

Figure 9

op V

iew

1. Idler

pulley

Drive belt

Engine pulley

1/8” (4 mm)

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

Leveling page 9, and Front-to-Rear Blade

Leveling page 10.

12. Raise attachment lift lever all the way to the

latched position and adjust mower transport

height adjustment; refer to page 8.

Installation

Transport

Height Adjustment

Transport height should be properly adjusted after

Tractor Preparation, page 6; however if the rear

brackets contact the footrest or up–stop contacts the

top of mower in the raised position, adjustment is

required.

1. Adjust by turning transport height nut, (Fig. 10)

on lift mechanism, clockwise to raise or

counterclockwise to lower mower.

2. Adjust nut until there is 1/4” (6 mm) clearance

between rear brackets and footrest and up–stop

and mower.

1223

Figure 10

1. Nut

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