Toro 78363 Manuel utilisateur

Operator’s Manual

IMPORTANT: Read this manual, and your tractor manual, carefully. They

contain 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. 3322–392

Wheel

Horse



48” Mower

for 5xi Tractors

Model No. 78363 – 9900001 & Up

The TORO Co. – 1999

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

1m–3520

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 3

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

Installing the Mower 4

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

Attach the PTO Drive Belt 7

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

Adjusting the Mower 9

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

Removing the Mower 12

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

Operation 14

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

Side Discharge 14

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

Operating the Power Take Off (PTO) 14

. . . .

Attachment Lift Lever 15

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

Adjusting the Two Front Wheels 16

. . . . . . . .

Check for Debris 16

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

Tips for Mowing Grass 16

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

Page

Maintenance 18

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

Service Interval Chart 18

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

Cutting Blade

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

Greasing and Lubrication 21

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

Checking PTO Drive Belt Tension 21

. . . . . .

Extending PTO Drive Belt Life 21

. . . . . . . . .

Blade Drive Belt 22

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

Storage 22

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

Washing the Underside of the Mower 23

. . . .

Troubleshooting 24

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

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 MOWER RIGHT SIDE

(Part No. 98–3481)

ON DISCHARGE CHUTE

(Part No. 93–1

122)

(2) ON LEVELER BAR

(Part No. 98–3478)

NEXT T

O FRONT WHEELS

(Part No. 93–7282)

ON MOWER REAR T

(Part No. 98–3480)

ON HEIGHT–OF–CUT

BRACKET

(Part No. 1

11655)

(1) ON DECK RIGHT SIDE

(1) ON DECK LEFT SIDE

(Part No. 92–7108)

Installation

Loose

Parts

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

DESCRIPTION QTY. USE

Discharge chute

Nylon washer 3/8”

Spring

Rubber bushing

Flat washer 1/2”

Lock nut 3/8”

Cotter pin 3/4”

Install discharge chute

O drive belt

Install PT

O drive belt

Pulley box

Install pulley box

Operator’

s Manual

Read before operating

Mower

Preparation

Install the Discharge Chute

1. Locate the items shown (Fig. 1).

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

hole in the discharge chute.

3. Position the spring and discharge chute over the

post on the rear of the deck and secure them with

a 1/2” (13 mm) washer and a 3/4” (19 mm)

cotter pin (Fig. 1).

4. Make sure the loop in the spring slides over the

stud on the mower housing.

5. Slide the rubber bushing and nylon washer over

the stud at the front of the mower.

6. Place the discharge chute over the stud and

secure it with a second nylon washer and 3/8”

lock nut (Fig. 1). The lock nut must be

tightened flush with the end of the stud.

IMPORTANT: The discharge chute must be

spring loaded in the down position. Lift the

chute up to test that it snaps to the full down

position.

6

Figure 1

1. Discharge

chute

2. Spring

Cotter pin 3/4” (19 mm)

4. W

asher 1/2” (13 mm)

Rubber bushing

Plastic washer

Jam nut 3/8”

Loop in spring

Post on mower housing

10.

Stud on mower housing

Installation

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 the discharge area or

mower blades unless you move the power

take off (PTO) to “OFF” and turn the

ignition key to “STOP.” Also remove the

ignition key and pull the wire(s) off the

spark plug(s).

Mower Belt Routing

1. Route the mower belt as shown in Fig. 2. Be

sure to install the belt on the lower mower deck

pulley.

m–3525

Figure 2

op V

iew

1. Mower

belt

Mower deck pulley

Installing

the Mower

Initial Preparation

The mower is most easily installed when done on a

level concrete surface. Rougher dirt or lawn surfaces

make installation more difficult.

1. Position the tractor and mower side by side, with

the mower on the right–hand side of the tractor.

2. Set the parking brake, raise the attachment lift,

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

engine. Remove the ignition key.

3. If you have previously had a snowthrower, blade

or tiller attached to the attachment lift, remove

the two clevis pins on each side of the

attachment lift (Fig. 3).

m–3433

Figure 3

1. Clevis

Hairpin cotter

4. Attach the pulley box if it is not already on the

tractor. Make sure the latches on the tractor’s

front Attach–A–Maticare open (Fig. 4). Then

slide the pulley box into the Attach–A–Matic

latches and seat it. Close the latches.

Installation

m–3463

Figure 4

1. Attach–A–Matic

latches

Pulley box

Idler pulley

Belt tension release arm

Belt tension adjustment

knob

Belt tension indicators

(one on each side)

7. Attach–A–Matic

button

(one on each side)

Attach the Mower

1. Make sure the mower wheels are set for low

height of cut.

2. Make sure the attachment lift is in the full up

position.

3. From the driver’s right–hand side of the tractor,

slide the mower under the tractor.

4. After sliding the mower under the tractor,

position it so that the slots in the side of each of

the mower’s mounting brackets (Fig. 5) are

aligned directly below the tractor’

s attachment

lift arm.

m–3519

Figure 5

1. Slots

in the side mounting

brackets (2)

Belt guide

Front–to–rear adjustment

rod

5. Start the tractor.

6. Lower the attachment lift arm fully and adjust

the deck’s position until you can pull out on the

J–pin of the lift arm and slide it into the slot in

the mounting bracket of the mower (Fig. 6).

7. On the driver’s left–hand side, pull out the

attachment lift J–pin and slide it into the slot on

the other mower mounting bracket.

m–3456

Figure 6

Left Side of Tractor Shown

1. J–pin 2. Mower

slot in side

mounting bracket.

Installation

8. After the two J–pins are seated through the

mower’s mounting brackets, using the

attachment lift and your hand on the right front

adjustable mower wheel bracket (Fig. 7),

position the mower so its attachment bar fits into

the mid Attach–A–Maticmount.

POTENTIAL HAZARD

•The “scissor” formed by the mower

mounting brackets and the attachment lift

arm is dangerous.

WHAT CAN HAPPEN

•Hands and fingers can get caught between

the mower parts and the tractor and be

injured.

HOW TO AV

OID THE HAZARD

•Keep hands away from moving parts while

operating the attachment lift.

•Always position the mower with your hand

on the right front mower wheel bracket.

•Never try to position the mower with your

hands on the mower mounting brackets or

below the mower housing.

m–35211

Figure 7

1. Place

hand here

9. Turn the lever of the Attach–A–Matic

counterclockwise to lock the mower to the

tractor (Fig. 8).

10. Set the parking brake, lower the attachment lift,

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

engine. Then remove the ignition key.

m–3611

Figure 8

1. Attach–A–Matic

button

2. Attach–A–Matic

lever

3. Lock

Installation

Attach

the PT

O Drive Belt

1. Hang the belt over the mower, then thread it

forward through the belt guide (Fig. 9) on the

mower.

m–3457

Figure 9

1. Belt 2. Belt

guide

2. Extend the belt through the center of the pulley

box, between the two pulleys.

3. Release the belt tension release arm on the

pulley box housing and swing it out toward you

(Fig. 12).

4. Remove the tractor’s grille by pulling it straight

out toward you.

POTENTIAL HAZARD

•Components under the hood will be hot if

the tractor has been running.

WHAT CAN HAPPEN

•Touching hot components can cause burns.

HOW TO AV

OID THE HAZARD

•Allow the tractor to cool before performing

maintenance or touching components

under the hood.

5. Position the belt into the groove of the PTO

pulley (Fig. 10), making sure it is also under the

pulleys in the pulley box.

m–4231 1

Figure 10

1. Pulley

box pulley

2. PT

O pulley

3. PT

O drive belt

6. Loop the other end of the belt over the drive

pulley of the mower. Additional belt slack can

be obtained (if needed) by turning the belt

tension adjustment knob (Fig. 12).

7. Make certain that the wide side of the PTO drive

belt is toward the outside diameter of all (four)

pulleys (Fig. 11).

m–4230

ÉÉÉÉ

Figure 1

1. Pulley

outside diameter

Wide side of belt

Installation

8. Now adjust the belt tension.

A. Push the belt tension release arm back

toward the pulley box to tension the belt.

B. Check the tension indicators on each side of

the pulley box.

C. If the tension indicators are not in the same

position on both the left and right sides,

release the belt tension, turn the adjustment

knob and repeat steps A and B until the

indicators move to the same position (Fig.

12).

D. Once the indicators are in the same position

on both sides, swing the tension release arm

into the pulley box and seat it by moving it

into the position shown in Figure 12.

m–3458

Figure 12

1. Belt

tension release arm

Belt tension indicator (2)

Belt tension adjustment

knob

Seating position for

tension arm

Belt tension released

9. Loosen the belt guide bolt (Fig. 13).

10. Adjust the belt guide so that it just touches the

belt on the inside arm of the guide (toward the

center of the deck) (Fig. 13).

m–3465

Figure 13

1. Belt

guide

2. Belt 3.

Belt touches here

Belt guide bolt

11. Tighten the belt guide bolt.

12. Replace the front grille of the tractor.

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