Toro 73570 Manual

 The T oro Company – 1998
Printed in USA All Rights Reserved
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
2
10
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
1
1
2
4
2
2
2
2
2
2
2
2
Installing the front wheels
Steering Wheel
Boot W asher
Nut
Lock W asher
T
rim Cover
1
1
1
1
1
Installing the steering wheel
Seat Assembly
Shoulder Bolt – 5/16”
Locknut – 5/16”
1
2
2
Installing the seat

Set-Up Instructions
2
DESCRIPTION USEQTY.
Bolt – 1/4”-20 x .88” Long
Hex Nut – 1/4”-20
Flat washer , 1/4”
2
2
2
Attaching the battery cables
Grille Screw – #8 x .50” Long
Grille W asher – .75” O.D.
2
2
Securing the grille
Hitch Pin
Hairpin Cotter
Flat W asher – .50” I.D.
1
1
2
Installing the drawbar hitch pin
Key 2 Use in ignition and “Key Choice” switches
Operator’ s Manual
Engine Operator ’ s Manual
1
1
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
3
2
1
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.
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
11
2 2
Figure 2
1. Slots 2. Grille Grommets

Set-Up Instructions
3
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
3
2
1
4
Figure 3
1. R.H. Spindle
2. L.H. Spindle
3. Steering arm
4. 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.
1
5
2
6
8
8
11
m–3452
3
4
910
12
7
Figure 4
1. Wheel spindle
2. Unplated thrust washer
1.56” x .06” thick
3. Front axle
4. Steering arm
5. Bolt 5/16”–18 x 2.25”
6. Nut 5/16”
7. Spindle cap
8. Plated wheel washer 1.50”
O.D. x .05” thick
9. 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
4
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
1
2
3
Figure 5
1. Wheel
2. Steering
arm
3. 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
1
2
Figure 6
1. Grille screw (1 of 2) 2. Grille washer (1 of 2)

Set-Up Instructions
5
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 .
1
2
5
m–3453
3
4
6
Figure 7
1. Seat
2. Seat
base
3. 5/16” shoulder bolt (2)
4. 5/16” Locknut (4)
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. 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
1
3
2
4
5
6
Figure 8
1. Boot washer
2. Steering shaft
3. Steering wheel
4. Lock washer
5. Nut
6. T
rim cover

Set-Up Instructions
6
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
1
2
3
Front of Tractor
Figure 9
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.
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 T 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
7
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.
1
2
3
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).
4
1
23
1254
Figure 1 1
1. Positive battery post
2. Negative battery post
3. Red (+) charger lead
4. 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
Pin
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
8
2
1
3
m–2481
4
Figure 12
1. Drawbar hitch pin
2. Drawbar hitch
3. .50” Flat washer
4. 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).