Toro 73570 Manuel

Printed in the USA

2001 by The Toro Company

8111 Lyndale Avenue South

Bloomington, MN 55420-1196

Form No. 3325-566

Setup

Instructions

Model No. 73570–220000001 & Up

520xi

Wheel HorseGarden Tractor

Loose Parts

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

DESCRIPTION QTY. USE

Rear Wheel

Wheel Bolt 2

10 Installing the rear wheels

R.H. Wheel Spindle

L.H. Wheel Spindle

Unplated Thrust Washer, 1.56 in. O.D x 0.06 in.

thick

Plated Wheel Washer, 1.5 in. O.D x 0.05 in.

thick

Bolt, 5/16-18 x 2.25 in.

Hex Nut, 5/16-18 in.

Spindle Cap

Front Wheel

Hubcap Washer, 2.5 in. O.D. x 0.05 in. thick

Cotter Pin, 1.5 in.

Shim Washer, 1.5 in. O.D. x 0.015 in. thick

Hubcap

Installing the front wheels

Steering Wheel

Boot Washer

Nut

Lock Washer

Trim Cover

Installing the steering wheel

Seat Assembly

Shoulder Bolt, 5/16 in.

Locknut, 5/16 in.

2Installing the seat

Bolt, 1/4-20 x 0.88 in.

Washer, 1/4 in.

Hex Nut, 1/4-20 in.

2Attaching the battery cables

DESCRIPTION USEQTY.

Grill Screw, #8 x 0.5 in.

Grill Washer, 0.75 in. O.D. 2

2Securing the grill

Hitch Pin

Hairpin Cotter

Flat Washer, 0.50 in. I.D.

1Installing the drawbar hitch pin

Key 2Use in ignition and KeyChoice switches

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. Install the wheel bolts and torque then to 75 to 80 ft-lb

(105 to 112 Nm).

m–1278

Figure 1

1. Hub

2. Rear wheel 3. 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. The front hood support braces

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

to install the front wheel spindles. To access these slots,

remove the front grill and raise the hood.

1. Remove the front grill and raise the hood.

m–3454

Figure 2

1. Slots 2. Grill Grommets

2. Remove, or be careful not to damage, the two upper

grill grommets (Fig. 2).

3. 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.

4. Install a 1.56 in. O.D. x 0.06 in. thick unplated thrust

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

spindle (Fig. 4).

5. 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

2. L.H. Spindle 3. Steering arm

4. Parallel relationship

6. Secure the spindle shaft to the steering arm with a

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

7. Torque the nut to 205 to 255 in–lbs (23 to 29 Nm).

8. Insert a 1.50 in. O.D x 0.05 in. thick plated wheel

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

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

valve stem facing inward (Fig 4).

10.Insert another 1.50 in. O.D x 0.05 in. thick plated

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

11. Install a 2.50 in. O.D x 0.05 in thick hub cap washer

onto the spindle.

12.Insert a 1.50 in. long cotter pin into the hole in the

spindle (Fig. 4).

13.Check the front wheel end play.

14.Install shim washers inside the hubcap washer as

necessary so there is minimum end play.

m–3452

910

Figure 4

1. Wheelspindle

2. Unplated thrust washer,

1.56 x 0.06 in.

3. Front axle

4. Steering arm

5. Bolt, 5/16–18 x 2.25 in.

6. Nut, 5/16 in.

7. Spindle cap

8. Plated wheel washer, 1.50

x 0.05 in.

9. Hub cap washer, 2.50 x

0.05 in.

10. Shim washer, 1.50 x

0.015 in.

11. Cotter pin, 0.056 x 1.50 in.

12. Hubcap

15.Secure the wheel to the spindle with the cotter pin.

Bend the ends of the cotter pin completely around the

spindle.

16.Install a hubcap onto the hubcap washer until it snaps

in place (Fig. 4).

17.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).

18.Adjust the steering arm if required.

m–3451

Figure 5

1. Wheel

2. Steeringarm 3. Parallel relationship

19.Insert a spindle cap into the steering arm (Fig. 4).

20.Repeat steps 4 through 19 on the opposite end of the

front axle.

21.Grease both spindles and the front axle pivot until

grease begins to come out of the bearings.

22.Lower the tractor to the ground.

23.Leave the front grill off until you have serviced the

battery.

Installing the Seat

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

shoulder bolts and locknuts (Fig. 6).

2. Insert the seat switch wire through the center opening

in the seat base (Fig 6).

3. Push the seat switch wire connector into the wire

harness connector.

m–3453

Figure 6

1. Seat

2. Seat base

3. Shoulder bolt (2), 5/16 in.

4. Locknut (4), 5/16 in.

5. Seat switch wire

connector

6. Opening for seat switch

wire

Installing the Steering Wheel

1. Install the boot washer onto the steering shaft (Fig. 7).

2. Remove the plastic trim cover from the steering wheel

(Fig. 7)

3. Install the steering wheel onto the shaft, carefully

aligning the splines (Fig. 7).

Note: There is no fixed straight ahead position on power

steering models.

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

washer and nut (Fig. 7).

5. Tighten the retaining nut to 45 to 50 ft–lbs (61 to

67 Nm)

6. Install the trim cover on the steering wheel.

m–2482

Figure 7

1. Boot washer

2. Steering shaft

3. Steering wheel

4. Lock washer

5. Nut

6. Trim cover

Checking Front Wheel Toe-In

With the tractor on a level surface, check to make sure the

front wheel toe-in is between 1/8 and 1/4 in. (3 to 6 mm).

For instructions on adjusting toe-in, refer to the

Maintenance section in Operator’s Manual.

Ensuring 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. 8).

m–4265

Front of Tractor

Figure 8

1. Left hand spindle stop

2. 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.

4. Recheck the toe in.

Checking Tire Pressure

Check front and rear tire pressure. The correct front and

rear tire pressure is 20 psi (138 kPa).

Activating the Battery

Battery posts, terminals, and related accessories

contain lead and lead compounds, chemicals

known to the State of California to cause cancer

and reproductive harm. Wash hands after

handling.

Warning

Bulk electrolyte with 1.265 specific gravity must be

purchased from a local battery supply outlet.

Danger

Battery electrolyte contains sulfuric acid which is

a deadly poison and causes severe burns.

•Do not drink electrolyte and avoid contact with

skin, eyes or clothing. Wear safety glasses to

shield your eyes and robber gloves to protect

your hands.

•Fill the battery where clean water is always

available for flushing the skin.

1. Remove the battery from the tractor.

2. Clean the top of the battery with a paper towel.

Note: Never fill the battery with electrolyte while the

battery installed in the tractor. Electrolyte could be

spilled on other parts and cause corrosion.

3. Remove the vent caps from the battery (Fig. 9).

4. Slowly pour electrolyte into each battery cell until the

level is up to the upper line (Fig. 9) on the battery

case.

Important Do not overfill the battery because

electrolyte (sulfuric acid) can cause severe corrosion and

damage to the chassis.

5. Wait five to ten minutes after filling the battery cells.

Add electrolyte, if necessary, until the electrolyte level

is up to the upper line (Fig. 9) on the battery case.

6. Install battery filler caps.

m-5004

Figure 9

1. Fillercaps

2. Upper line 3. Lower line

7. Charge battery for 10 to 15 minutes at 25 to 30

amps or 30 minutes at 4 to 6 amps.

Charging the battery produces gasses that can

explode.

Never smoke near the battery and keep sparks

and flames away from battery.

Warning

8. When the battery is fully charged, unplug the charger

from the electrical outlet, then disconnect the charger

leads from the battery posts (Fig. 10).

m-4970

Figure 10

1. Positive Battery Post

2. Negative Battery Post 3. Red (+) Charger Lead

4. Black (–) Charger Lead

9. Install the battery in the tractor and connect the battery

cables. (Refer to the Operator’s Manual – Installing

the Battery.)

Note: Do not run the tractor with the battery disconnected,

electrical damage may occur.

10.After servicing the battery, replace the front grill of the

tractor and secure the grill with two #8 x .50” long

grill screws and .75” O.D. grill washers in the upper

two grill mounting holes (Fig. 11).

m–3558

Figure 11

1. Grill screw (1 of 2) 2. Grill washer (1 of 2)

Installing the Drawbar Hitch

Insert the drawbar hitch pin into the drawbar hitch and

secure it with a 0.50 in. I.D. flat washer and hairpin cotter

(Fig. 12).

3m–2481

4Figure 12

1. Drawbarhitch pin

2. Drawbar hitch 3. Flat washer, 0.50 in. I.D.

4. Hairpin cotter

Checking the Wiring 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.

•Ensure all fasteners are tight.

Test Driving the Tractor

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

Operator’s Manual for oil type, viscosity and

crankcase capacity).

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

Operator’s Manual for oil type, viscosity and

capacity).

3. Check the coolant level in the coolant recovery tank.

4. Ensure that all lubrication points have been greased as

shown in the Maintenance section of tractor Operator’s

Manual.

5. Fill the tank with unleaded regular gasoline with an

octane rating of at least 85.

6. Open the fuel shutoff valve and check the fuel hose

and fittings for leaks.

7. 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

•Transmission controls

•Steering

•Tractor operation in forward and reverse

8. Test the operation of the safety interlock system (refer

to the Operator’s Manual for the correct procedure).

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