Toro 73570 Manual



The T

oro Company – 1998

FORM NO. 3321–971

SET UP

INSTRUCTIONS

MODEL NO. 73570–9900001 & UP

520xi GARDEN TRACTOR

Loose

Parts

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

DESCRIPTION QTY. USE

Rear Wheel

Wheel Bolt

Installing the rear wheels

R.H. Wheel Spindle

L.H. Wheel Spindle

Unplated Thrust W

asher – 1.56” O.D x .06”

Thick

Plated Wheel W

asher –1.50” O.D x .05” Thick

Bolt – 5/16”-18 x 2.25” Long

Hex Nut – 5/16”-18

Spindle Cap

Front Wheel

Hubcap W

asher – 2.50” O.D x .05” Thick

Cotter Pin –.156” x 1.50” Long

Shim W

asher – 1.50” O.D x .015” Thick

Hubcap

Installing the front wheels

Steering Wheel

Boot W

asher

Nut

Lock W

asher

rim Cover

Installing the steering wheel

Seat Assembly

Shoulder Bolt – 5/16”

Locknut – 5/16”

Installing the seat

Set-Up Instructions

DESCRIPTION USEQTY.

Bolt – 1/4”-20 x .88” Long

Hex Nut – 1/4”-20

Flat washer

, 1/4”

Attaching the battery cables

Grille Screw – #8 x .50” Long

Grille W

asher – .75” O.D.

Securing the grille

Hitch Pin

Hairpin Cotter

Flat W

asher – .50” I.D.

Installing the drawbar hitch pin

Key 2

Use in ignition and “Key Choice” switches

Operator’

s Manual

Engine Operator

’

s Manual

Read before operating the tractor

Installing

the Rear Wheels

1. Remove the four wheel bolts holding the rear

shipping brackets to the rear hubs.

2. Using a jack or suitable hoist, raise the rear of

the tractor only high enough to install the rear

wheels.

3. Install the wheels onto the hubs with the valve

stems facing inward (Fig. 1).

4. Tighten the wheel bolts to 75–80 ft-lb

(105–112 Nm).

m–1278

Figure 1

1. Hub

2. Rear

wheel

Wheel bolt (5)

Installing

the Front Wheels

IMPORTANT: Never raise the front of the

tractor by placing a jack under the bumper

or front axle because the tractor may be

damaged.

1. The front hood support braces have two slots

(Fig. 2) that may be used to lift the tractor to

install the front wheel spindles. T

o access these

slots, remove the front grille and raise the hood.

m–3454

2 2

Figure 2

1. Slots 2. Grille

Grommets

Set-Up Instructions

Note: Remove, or be careful not to damage,

the two upper grille grommets (Fig. 2).

2. Using a suitable hoist, raise the front of the

tractor only high enough to install the front

wheel spindles.

IMPORTANT: Do not pivot the weight of the

tractor onto the rear drawbar hitch because

the hitch will be damaged.

3. Install a 1.56” O.D. x .06” thick unplated thrust

washer onto the splined shaft of the R.H. wheel

spindle (Fig. 4).

4. Install the splined end of the R.H. spindle

through the R.H. end of the front axle and into

the steering arm (Fig. 4).

Note: The L.H. and R.H. spindles are

different. Assemble the spindles as

shown in figure 3.

Note: The outside edge of the spindle must

be parallel to the end of the steering

arm (Fig. 3).

m–3610

Figure 3

1. R.H.

Spindle

L.H. Spindle

Steering arm

Parallel relationship

5. Secure the spindle shaft to the steering arm with

a 5/16”–18 x 2.25” bolt and 5/16” nut (Fig. 4).

Torque the nut to 230 25 in–lbs.

6. Insert a 1.50” O.D x .05” thick plated wheel

washer onto the R.H. spindle (Fig. 4).

7. Install a front wheel onto the R.H. spindle with

the valve stem facing inward (Fig 4).

8. Insert another 1.50” O.D x .05” thick plated

wheel washer onto the R.H. spindle (Fig. 4).

9. Install a 2.50” O.D x .05” thick hub cap washer

onto the spindle. Now insert a .156 x 1.50” long

cotter pin into the hole in the spindle (Fig. 4).

10. Check the front wheel end play. Install shim

washers inside the hubcap washer as necessary

so there is minimum end play.

m–3452

910

Figure 4

1. Wheel

spindle

Unplated thrust washer

1.56” x .06” thick

Front axle

Steering arm

Bolt 5/16”–18 x 2.25”

Nut 5/16”

Spindle cap

8. Plated

wheel washer 1.50”

O.D.

x .05” thick

Hub cap washer 2.50”

O.D. x .05” thick

10.

Shim washer 1.50” O.D. x

.015” thick

11.

Cotter pin .056” x 1.50”

12. Hubcap

Set-Up Instructions

11. Secure the wheel to the spindle with a cotter pin.

Bend the ends of the cotter pin completely

around the spindle.

12. Install a hubcap onto the hubcap washer until it

snaps in place (Fig. 4).

13. Look at the end of the steering arm and the

inside edge of the tire. The end of the steering

arm and the inside edge of the tire must be

parallel (Fig. 5). Adjust the steering arm if

required.

m–3451

Figure 5

1. Wheel

2. Steering

arm

Parallel relationship

14. Insert a spindle cap into the steering arm

(Fig. 4).

15. Repeat the procedure on the opposite end of the

front axle.

16. Lubricate both spindles and the front axle pivot

until grease begins to come out of the bearings.

17. After servicing the battery, replace the front

grille of the tractor and secure the grille with two

#8 x .50” long grille screws and .75” O.D. grille

washers in the upper two grille mounting holes

(Fig. 6).

m–3558

Figure 6

1. Grille

screw (1 of 2)

Grille washer (1 of 2)

Set-Up Instructions

Installing

the Seat

1. Mount the seat to the seat base using two 5/16”

shoulder bolts and lock nuts (Fig. 7).

2. Insert the seat switch wire through the center

opening in the seat base (Fig 7).

3. Push the seat switch wire connector into the wire

harness connector

m–3453

Figure 7

1. Seat

2. Seat

base

5/16” shoulder bolt (2)

5/16” Locknut (4)

Seat switch wire

connector

Opening for seat switch

wire

Installing

the Steering Wheel

1. Install the boot washer onto the steering shaft

(Fig. 8).

2. Remove the plastic trim cover from the steering

wheel (Fig. 8)

3. Install the steering wheel onto the shaft,

carefully aligning the splines (Fig. 8).

Note: Be sure to align steering wheel in the

straight ahead position.

4. Secure the steering wheel to the shaft with a lock

washer and nut

(Fig. 8). Tighten the retaining nut

to 45–50 ft–lbs.

5. Install the trim cover on the steering wheel.

m–2482

Figure 8

1. Boot

washer

Steering shaft

Steering wheel

Lock washer

5. Nut

6. T

rim cover

Set-Up Instructions

Check

to Insure that the

Steering Linkage is Centered

1. With the tractor on a level surface, turn the

steering wheel fully to the left and check the

clearance of the left hand spindle stop to the stop

on the front axle. There should be a slight

clearance between the stops (Fig. 9).

m–4265

Front of Tractor

Figure 9

1. Left

hand spindle stop

Axle stop

3. Clearance

2. Repeat for the right front tire in a right turn.

3. If the stops on one side hit, and on the other side

have clearance, shorten the tie rod on the side

that hits, and equally lengthen the tie rod on the

opposite side until both sides have clearance.

Recheck the toe in.

Checking

Front Wheel T

oe–In

With the tractor on a level surface, check to make

sure the front wheel toe-in is between 1/8” and 1/4”.

For instructions on adjusting toe-in, refer to the

Maintenance section in Operator’

s Manual.

Checking

ire Pressure

Check front and rear tire pressure. The correct front

and rear tire pressure is 20 psi (138 kPa).

Activating

the Battery

POTENTIAL

HAZARD

•Battery electrolyte contains sulfuric acid

which is a deadly poison and it causes

severe burns.

WHAT CAN HAPPEN

•If you carelessly drink electrolyte you could

die or if it gets onto your skin you will be

burned.

HOW TO AV

OID THE HAZARD

•Do not drink electrolyte and avoid contact

with skin, eyes or clothing. Wear safety

glasses to shield your eyes and rubber

gloves to protect your hands.

•Fill the battery where clean water is always

available for flushing the skin.

•Follow all instructions and comply with all

safety messages on the electrolyte container.

1. Remove the battery from the tractor (refer to

Removing the Battery in your tractor Operator’s

Manual).

Note: Never fill the battery electrolyte with

the battery installed in the tractor.

Set-Up Instructions

2. Remove the filler caps from the battery. Slowly

pour electrolyte into each cell until the

electrolyte level is up to the lower part of the

tube (Fig. 10). Use an electrolyte with a specific

gravity of 1.265.

1262

Figure 10

1. Filler

caps

2. Electrolyte 3.

Lower part of tube

POTENTIAL

HAZARD

•Charging battery pr

oduces gasses.

WHAT CAN HAPPEN

•Battery gasses can explode.

HOW TO AV

OID THE HAZARD

•Keep cigarettes, sparks and flames away

from battery.

3. Leave the filler caps off and connect a 3–4 amp

battery charger to the battery posts (Fig. 11).

Charge the battery at a rate of 4 amperes or less

for 4 hours (12 volts).

4. When the battery is fully charged, unplug the

charger from electrical outlet, then disconnect

the charger leads from the battery posts (Fig. 11).

1254

Figure 1

1. Positive

battery post

Negative battery post

Red (+) charger lead

Black (–) charger lead

5. Slowly pour electrolyte into each cell until the

level is once again up to “UPPER” line on the

battery case (Fig. 10), then install the filler caps.

6. Install the battery in the tractor and connect the

battery cables (refer to Installing the Battery in

your tractor Operator’s Manual).

Note: Do not run the tractor with the battery

disconnected.

Installing

the Drawbar Hitch

Insert the drawbar hitch pin into the drawbar hitch

and secure it with a .50” I.D. flat washer and hairpin

cotter (Fig. 12).

Set-Up Instructions

m–2481

Figure 12

1. Drawbar

hitch pin

Drawbar hitch

.50” Flat washer

Hairpin cotter

Checking

the W

iring and

Fasteners

•Inspect the tractor for any loose electrical

connections and secure them as required. Check

the wire routing to make sure moving parts do

not interfere with wires and cause a short.

•Assure all fasteners are tight.

Burnishing

the Clutch

The following break–in procedure must be performed

as part of pre–delivery service or when a new clutch

is installed.

Note: There must be a PTO driven

attachment installed to provide a load

in order to burnish the clutch facings

properly.

1. Run the engine at full throttle and engage the

clutch bringing the load to full speed. Then

disengage the clutch.

2. Let the load come to a full stop, then engage

again.

3. Repeat these procedures (1 and 2) 5 times.

Test

Driving the T

ractor

1. Check the oil level in the crankcase (refer to

Engine Oil in your tractor Operator’s Manual for

oil type, viscosity and crankcase capacity).

2. Check the oil level in the transaxle (refer to

Transaxle Fluid in your tractor Operator’s

Manual for oil type, viscosity and capacity).

3. Check to make sure all lubrication points have

been greased as shown in the Maintenance

section of tractor Operator’

s Manual.

4. Fill the tank with unleaded regular gasoline with

an octane rating of at least 85. Open the fuel

shutoff valve and check the fuel hose and fittings

for leaks.

5. As applicable, check and test the operation of the

following:

•Engine, choke and throttle controls

•Gauges

•

Headlights and taillights

•Indicator lights

•PTO clutch and brake

•Lift system

•Service and parking brakes

•T

ransmission controls

•Steering

•Tractor operation in forward and reverse

6. Test the operation of the safety interlock system

(refer to the tractor Operator’s Manual for the

correct procedure).

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