Toro Groundsmaster 580-D User manual

FORM NO. 3319-945
The TORO COMPANY - 1998
GROUNDSMASTER580-D
MODEL NO. 30581 - 80001 & UP OPERATOR'S
MANUAL
(TRACTION AND CUTTING UNITS)
To understand this product, and for safety and
optimum performance, read this manual before
starting the engine. Pay special attention to SAFETY
INSTRUCTIONS highlighted by this symbol.
It means CAUTION, WARNING or DANGER -
personal safety instruction. Failure to comply with
the instruction may result in personal injury.
The GROUNDSMASTER 580-D meets or exceeds
the American National Standards Institute's safety
standards for riding mowers; thus TORO proudly
displays the ANSI safety seal.

2
FOREWORD
The Groundsmaster580-D was developed to satisfy the demand for a large scale rotary mower that combines
the productivity of a 16-foot mowing machine with the handling ease of a trim mower. The Groundsmaster 580-D
has advanced concepts in engineering and design, and if properly maintained, will provide excellent service.
Since the Groundsmaster 580-D is a high quality product, TORO is concerned about its future use and safety of the
user. Therefore, anyone involved with the product, including the operator, should read and understand this manual.
Major sections are:
- Safety Instructions
- Specifications
- Before Operating
- Controls
- Operating Instructions
- Maintenance
This manual emphasizes safety, mechanical and general product information. DANGER, WARNING and CAUTION
identify safety messages. Whenever the triangular safety alert symbol appears, understand the safety message
that follows. For complete safety instructions, read pages 3 - 7. IMPORTANT highlights special mechanical
information and NOTE emphasizes general product information worthy of special attention.
Diesel engine exhaust and some of its
constituents are known to the State of
California to cause cancer, birth defects,
or other reproductive harm.
SPARK ARRESTER
In some places a spark arrester muffler must be used because of local, state or federal regulations. Since the engine
on the Groundsmaster 580-D is fitted with a turbo-charger as standard equipment, it meets the spark arrestor
standards of the United States Department of Agriculture, the United States Forestry and Section 4442, Public
Resources Code of the State of California.
This product is equipped with a diesel engine certified by the manufacturer to meet EPA regulations for Nonroad
Diesel Engine Emission Standards in affect at the time of manufacture.
SERVlCE MANUAL
The Groundsmaster580-D Service Manual contains information for troubleshooting, testing and repair of the
hydraulic system, brakes and cutting units for the Groundsmaster580-D. To order this publication, contact your
local authorized Toro Distributor. Ask for Form 90-743-SL, Groundsmaster580-D Service Manual.
MITSUBISHI S4S-DT DIESEL ENGINE MANUAL ORDERING INFORMATION:
IN THE U.S.:
Contact Mitsubishi Engine North America Technical
Publications Department. 610 Supreme Drive
Bensenville, IL. 60106
OUTSIDE THE U.S.:
Contact your local Mitsubishi Engine Distributor (or
Your Authorized Toro Distributor).
Whenever you have questions or need service, contact your local authorized Toro Distributor. In addition to having a
complete line of accessories and professional turf care service technicians, the distributor has a complete line of
genuine TORO replacement parts to keep your machine operating properly. Keep your TORO all TORO. Buy
genuine TORO parts and accessories.

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TABLE OF CONTENTS
SAFETY INSTRUCTIONS 3-4. . . . . . . . . . . . . . . . . . .
SAFETY AND INSTRUCTION DECALS 5-7. . . . . .
SPECIFICATIONS 8-9. . . . . . . . . . . . . . . . . . . . . . . . .
LOOSE PARTS 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BEFORE OPERATING 11-14. . . . . . . . . . . . . . . . . . .
CONTROLS 15-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OPERATING INSTRUCTIONS 18-25. . . . . . . . . . . . .
LUBRICATION 25-26. . . . . . . . . . . . . . . . . . . . . . . . . .
DAILY MAINTENANCE CHECKLIST 27. . . . . . . . . . .
MAINTENANCE 28-42. . . . . . . . . . . . . . . . . . . . . . . . .
Engine Oil and Filter 28. . . . . . . . . . . . . . . . . . . . . .
Engine Fuel System 29. . . . . . . . . . . . . . . . . . . . . . .
Engine Cooling System 30. . . . . . . . . . . . . . . . . . .
Air Cleaner Maintenance 31. . . . . . . . . . . . . . . . . .
Hydraulic System Service 32. . . . . . . . . . . . . . . . . .
Planetary Gear Drive Service 33. . . . . . . . . . . . . . .
Battery Service 34. . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuses and Circuit Breaker 35. . . . . . . . . . . . . . . . .
Brake System Service 35. . . . . . . . . . . . . . . . . . . . .
Wheels and Tires 35. . . . . . . . . . . . . . . . . . . . . . . . .
Cutting Unit Lubrication 36. . . . . . . . . . . . . . . . . . .
Blade Maintenance 36. . . . . . . . . . . . . . . . . . . . . . .
Blade Bolt Torque 37. . . . . . . . . . . . . . . . . . . . . . . . .
Removing Cutting Unit Blades 37. . . . . . . . . . . . .
Inspecting and Sharpening Blade 37. . . . . . . . . .
Adjusting Cutting Unit Belt Tension 38. . . . . . . .
Replacing Blade Drive Belts 39. . . . . . . . . . . . . . . .
Separating Cutting Units from Traction Unit 39. .
Checking and Correcting Cutting Unit Blade
Mismatch 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjusting Winglet Stabilizers 41. . . . . . . . . . . . . . .
Traction Control Neutral Adjustment 41. . . . . . . .
Traction (Neutral) Switch Adjustment 41. . . . . . . .
Traction Control Rod Adjustment 42. . . . . . . . . . .
Cylinder Head Bolts 42. . . . . . . . . . . . . . . . . . . . . . .
Engine Valve Clearance 42. . . . . . . . . . . . . . . . . . .
ELECTRICAL SCHEMATICS 43-44. . . . . . . . . . . . . .
HYDRAULIC SCHEMATIC 45. . . . . . . . . . . . . . . . . . . .
MAINTENANCE SCHEDULE 46. . . . . . . . . . . . . . . . . .
PRODUCT IDENTIFICATION 47. . . . . . . . . . . . . . . . .
THE TORO PROMISE Back Cover. . . . . . . . . . . . . . . .
SAFETY INSTRUCTIONS
Improper use or maintenance by the operator or owner
of the machine can result in injury. Reduce the potential
for any injury by complying with the following safety
instructions.
BEFORE OPERATING
1. Read and understand the contents of this manual
before operating the machine. To get replacement
manuals, send complete model and serial number to:
The Toro Company
8111 Lyndale Avenue South
Bloomington, MN 55420-1196.
2. Never allow children to operate the machine or
adults to operate it without proper instruction.
3. Become familiar with the controls and know how to
stop the machine and engine quickly.
4. Keep all shields, safety devices and decals in
place. If a shield, safety device or decal is
malfunctioning, illegible or damaged, repair or replace
it before operating the machine.
5. Always wear substantial shoes. Do not operate
machine while wearing sandals, tennis shoes,
sneakers or when barefoot. Do not wear loose fitting
clothing that could get caught in moving parts and
possibly cause personal injury.
6. Wearing safety glasses, safety shoes, long pants
and a helmet is advisable and required by some local
ordinances and insurance regulations.
7. Make sure the work area is clear of objects which
might be picked up and thrown by the cutter blades.
8. Do not carry passengers on the machine. Keep
everyone, especially children and pets, away from the
areas of operation.
9. Since diesel fuel is highly flammable, handle it
carefully:
A. Use an approved fuel container.
B. Do not remove fuel tank cap while engine is hot
or running.
C. Do not smoke while handling fuel.
D. Fill fuel tank outdoors and only to within an
inch (25 mm) from the top of the tank, not the filler
neck. Do not overfill.
E. Wipe up any spilled fuel.
10. Be sure interlock switches are adjusted correctly
so engine cannot be started unless traction pedal is
released - neutral position - and PTO switch is in
NEUTRAL position.
WHILE OPERATING
11. Check interlock switches daily for proper
operation. If a switch malfunctions, replace or adjust it
before operating the machine. The interlock system is
for your protection, so do not bypass it. Replace all
interlock switches every two years.
12. Do not run engine in a confined area without
adequate ventilation. Exhaust is hazardous and could
be deadly.
13. Sit on the seat when starting and operating the
machine.
14. Before starting the engine each day, test warning
lamps and signal lights to assure proper operation.

4
SAFETY INSTRUCTIONS
15. Pay attention when using the machine. To prevent
loss of control:
A. Mow only in daylight or when there is good
artificial light.
B. Watch for holes or other hidden hazards.
C. Be extremely careful when operating close to
sand traps, ditches, creeks, steep hillsides or other
hazards.
D. Reduce speed when making sharp turns.
Avoid sudden stops and starts.
E. Look to the rear to assure no one is behind the
machine before backing up.
F. Watch for traffic when near or crossing roads.
Always yield the right-of-way.
G. Reduce speed when driving downhill.
16. Keep hands, feet and clothing away from moving
parts and the cutting units.
17. This product may exceed noise levels of 85 dB(A)
at the operator position. Ear protectors are
recommended, for prolonged exposure, to reduce the
potential of permanent hearing damage.
18. Do not touch engine, turbo-charger, radiator,
muffler or exhaust pipe while engine is running or soon
after it is stopped. These areas could be hot enough to
cause burns.
19. Before getting off the seat:
A. Move traction pedal to neutral.
B. Set parking brake.
C. Disengage cutting units and wait for blades to
stop.
D. Stop engine and remove key from switch.
E. Do not park on slopes unless wheels are
chocked or blocked.
20. If a cutting blade strikes a solid object or vibrates
abnormally, stop immediately, turn engine off, set
parking brake and wait for all motion to stop. Inspect
for damage. Repair or replace any damaged parts
before operating.
MAINTENANCE
21. Before servicing or making adjustments, stop
engine and remove key from the switch.
22. Assure entire machine is properly maintained and
in good operating condition. Frequently check all nuts,
bolts and screws.
23. Frequently check all hydraulic line connectors and
fittings. Assure all hydraulic hoses and lines are in
good condition before applying pressure to the
system.
24. If the Groundsmaster 580-D loses power and
needs to be moved, either by-pass the hydraulic
pump or unlock the front wheel hubs. Unlocking the
front wheels disables the machine braking system.
Block the wheels before unlocking the hubs to keep
the machine from moving. To tow the machine,
connect to the towing vehicle with a rigid towing
device. Do not use chains, cables or other non-rigid
devices for towing. Lock the hubs when towing is
completed.
25. Keep body and hands away from pin hole leaks or
nozzles that eject high pressure hydraulic fluid. Use
cardboard or paper to find hydraulic leaks. Hydraulic
fluid escaping under pressure can penetrate skin and
cause injury. Fluid accidentally injected into the skin
must be surgically removed within a few hours by a
doctor or gangrene may occur.
26. Before any hydraulic system maintenance, stop
engine and lower cutting units to the ground so all
pressure is relieved.
27. For major repairs or other assistance, contact your
local Toro Distributor.
28. To reduce potential fire hazard, keep engine area
free of excessive grease, grass, leaves and dirt.
29. If engine must be running to perform maintenance
or an adjustment, keep hands, feet, clothing and other
parts of the body away from cutting units and other
moving parts. Keep everyone away.
30. Do not overspeed the engine by changing
governor setting. Maximum engine speed is 2750 rpm.
To assure safety and accuracy, have an Authorized
Toro Distributor check maximum engine speed.
31. Shut engine off before checking or adding oil to the
crankcase.
32. Disconnect battery before servicing the machine.
If battery voltage is required for troubleshooting or test
procedures, temporarily connect the battery.
33. For optimum performance and safety, use genuine
Toro replacement parts and accessories.
Replacement parts and accessories made by other
manufacturers could be dangerous and may void the
product warranty of The Toro Company.

5
SAFETY AND INSTRUCTION DECALS
The following decals are installed on the machine. If any become damaged or illegible, replace it. The decal part
number is listed below and in your parts catalog. Replacement decals can be ordered from your Authorized Toro
Distributor.
UNDER LOWER CONTROL COVER
(Part No. 98-1487)
ON REAR FENDER AND FRONT FRAME
(Part No. 72-4080)
ON RIGHT SIDE OF SEAT
(Part No. 80-4890)
UNDER LOWER CONTROL COVER
(Part No. 95-0831)
ON CUTTING UNITS, UNDER COVERS
(Part No. 67-5360)
ON REAR FENDER AND FRONT FRAME
(Part No. 93-9371)
Replaces Decal Part No.
72-4080 for CE
ON CUTTING UNITS, UNDER COVERS
(Part No. 93-7273)
Replaces Decal Part No.
67-5360 for CE
ON FENDER ALONGSIDE HYDRAULIC TANK
(Part No. 95-0821)
ON FAN SHROUD
(Part No. 76-8750)

6
SAFETY AND INSTRUCTION DECALS
ON FLOOR, FORWARD
OF TRACTION PEDAL
(Part No. 69-0940)
ON DECK, UNDER COVER
(Part No. 95-0833)
ON FENDER
ALONGSIDE FUEL TANK
(Part No. 95-0822) ON LEFT REAR OF CUTTING UNIT
(Part No. 95-0817)
ON BOTH WHEEL HUBS
(Part No. 72-4070)
ON LOWER CONTROL PANEL
(Part No. 98-3040)
ON FRONT OF CUTTING UNITS
(Part No. 43-8480)
ON FLOOR, FORWARD
OF TRACTION PEDAL
(Part No. 95-0823)
Replaces Decal Part No.
69-0940 for CE
ON FRONT OF CUTTING UNITS
(Part No. 93-7815)
Replaces Decal Part No.
43-8480 for CE
ON BOTH WHEEL HUBS
(Part No. 95-0829)
Replaces Decal Part No.
72-4070 for CE

7
SAFETY AND INSTRUCTION DECALS
ON FRONT AND REAR CUTTING
UNITS MOTOR MOUNT PLATES
(Part No. 95-0845)
RIGHT SIDE NEAR TEST PORTS
(Part No. 95-0824)
ON CUTTING UNITS
(Part No. 66-1340)
ON CENTER CONTROL PANEL
(Part No. 95-0815)
ON STEERING COLUMN SUPPORT
(Part No. 95-0825)
ON DECK, UNDER COVER
(Part No. 95-0819) ON DECK, UNDER COVER
(Part No. 95-0820)
ON CUTTING UNIT CASTOR ARMS
(Part No. 95-0818)
RIGHT SIDE NEAR TEST PORTS
(Part No. 93-7824)
Replaces Decal Part No.
66-1340 for CE
RIGHT SIDE NEAR TEST PORTS
(Part No. 98-4387)

8
SPECIFICATIONS
TRACTION UNIT
Engine: Mitsubishi, Model S4S-DT 4 cycle, four
cylinder, over-head valve, 203.3 cu. in. (3331 cc)
displacement, water cooled diesel. Rated 80 hp @
2750 rpm. 17:1 compression ratio, direct injected and
turbo-charged. Crankcase capacity: 10.6 qt (10 l)
w/filter.
Air Cleaner: Heavy duty, centrifugal air type
w/replaceable element.
Cooling System: Radiator w/wide-spaced fins
(5 per in.). Variable speed fan controlled by engine
temperature. Full flow hydraulic oil cooler (7 fins/in.).
Coolant capacity 3.9 gal (14.7 l) of 50/50 mixture of
ethylene glycol and water.
Fuel System: Fuel tank capacity: 28 gal (106 l) of No. 2
diesel fuel.
Electrical: 12 volt automotive type system. Dual
maintenance free batteries w/1300 Amp cold cranking
power at 0F (18C). 50 Amp alternator with integral
regulator.
Controls: Individual deck lift levers, High Range/Low
Range ground speed selector, PTO and ignition
switches. Hand throttle, ON/OFF cruise control switch
and cruise engage button. Single implement shut-off,
steering tower and wheel tilt lever and service brake
pedal. Foot operated traction pedal and steering brake
pedals with parking brake latch.
Warning Systems: Indicator lights and audible signals
warn of:
Low engine oil pressure.
High water temperature.
No charge.
Water in fuel.
Low hydraulic oil level.
High hydraulic oil temperature.
Air cleaner clogged.
Hydraulic oil filter needs service.
Indicator lights alone indicate:
Parking brake on.
Cruise control is engaged.
Groundsmaster 580-D is in High Range ground
speed mode.
Interlock System: Prevents engine starting if traction
pedal is out of neutral. Stops engine if operator either
leaves seat or parking brake on with traction pedal out
of neutral. Prevents PTO engagement if operator is out
of seat, engine is off, or all cutting units are raised.
Prevents engagement of High Range ground speed
mode if a cutting unit is lowered, front cutting unit is not
fully raised or if engine is shut off.
Steering: 15-1/2 in. (39 cm) patented tilt steering
wheel and tower, released and locked by single control
lever. Dual hydraulic cylinder power steering for extra
sharp turning.
Seat and Storage: Deluxe seat w/armrests, backrest
and suspension. Adjustable fore and aft travel, weight
and height. Tool storage tray under hinged floor plate;
storage and beverage holder alongside control panel.
Brakes: Enclosed, multiple front hydraulic disc brakes
operated by right foot pedal. Mechanical steering
brakes via two pedals which lock together for parking
brake function. Dynamic braking through closed-loop
hydrostatic drive.
Tires/Wheels:
Front - two 31 x 12.50-15, 8-ply high floatation
turf tires w/tubes.
Rear - two 23 x 10.50-12, 6 ply tubeless turf tire.
Ground Speed: Infinitely variable.
Forward Speeds - Low; 0-7.5 mph (12.1 km/h).
High; 0-20 mph (32.2 km/h).
Reverse Speeds - Low; 0-3 mph (4.8 km/h).
High; 0-8 mph (12.9 km/h).
Ground Clearance: 8 in. (20.3 cm).
Hydraulic Oil System and Reservoir: 40 gal (151 l)
total system capacity. Reservoir capacity: 32 gal
(121 l). Replaceable spin-on 5 micron filter element.
Traction System: Hydrostatic closed loop system
driving gear reduction wheel drives. Has bypass valve
for towing. Adjustable foot pedal with speed stop
controls forward/reverse ground speed. Switch
engaged cruise control, disengaged by service brake
or ON/OFF switch. Cruise speed changeable without
disengagement.
Machine Fluid Recommendations:
Engine Oil: API Service Classification CD (see Before
Operating or Lubrication section for oil grade
recommendations).
Diesel Fuel: ASTM No. 2-D
Cooling System: 50/50 mix; Water & Ethylene Glycol
Hydraulic Oil (Recommended brands):
Mobil 15 M
Mobil DTE 26
Shell Tellus 68
Amoco Rykon Oil #68
Conoco Super Hydraulic Oil 68
Exxon Nuto H 68
Kendall Kenoil R & O AW 68
Pennzoil Penreco 68
Phillips Magnus A 68
Standard Energol HLP 68
Sun Sunvis 831 WR
Union Unax AW 68
Note: All are interchangeable.
IMPORTANT: Use only hydraulic oils specified.
Other fluids could cause system damage.
Note: A red dye additive for the hydraulic system oil is
available in 2/3 oz (20 ml) bottles. One bottle is
sufficient for 4-6 gal (15-23 l) of hydraulic oil. Order
Part No. 44-2500 from your Authorized Toro
Distributor.

9
SPECIFICATIONS
CUTTING UNITS
Cutting Unit Drive System: All hydraulic drive. Initial
cutting drive engagement via electric switch. Drive
shuts off or engages individually as cutting units are
raised or lowered.
Automatic Weight Transfer: Patented automatic
weight transfer from decks to traction unit under
demanding traction situations for improved traction
and deck floatation.
Cutting Unit Configuration: A 92 in. (234 cm) Triflex
front center cutting unit and two 57 in. (145 cm)
outboard cutting units.
Mowing Rate/Width: Mows up to 14-1/2 acres/hr (5.9
hectares at 7.5 mph (12.1 km/hr) using all cutting units
(assumes no overlap and stops).
Total cutting width: 192 in. (488 cm).
Height-of-Cut Range:
Low - 1-4 in. (2.5-10.2 cm).
High - 2-1/2 - 5-1/2 in. (6.3-14 cm).
Blades: Interchangeable heat treated steel blades, 20
in. (50.8 cm) long, 1/4 in.(6.3 mm) thick and 2-1/2 in.
(6.3 cm) wide. 5 blades on Triflex and 3 each on
outboard units.
Anti-scalp Devices: Cutting units equipped with
adjustable skids. Anti-scalp cup on each blade
assembly.
TRIFLEX CUTTING UNIT (FRONT)
Type: Triflex front mounted rotary cutting unit with 5
blade spindles and 92 in. (234 cm) width of cut.
Trimming Ability: Trims to either side. 8 in. (20.3 cm)
cutting unit offset from outside of wheel to trim side of
front cutting unit on either side.
Height-of-Cut Adjustment: 1/2 in. (12.7 mm)
increments by spacers on front castor shafts and clevis
pins on rear wheel forks.
Cutter Drive: Hydraulic gear motor. "BB" hex section
belt to center cutting unit spindles, "B" section belt to
wings. Splined shafts, each in two greaseable, tapered
roller bearings in cast iron housings (greaseable from
the top). Self tensioning and permanently lubricated
belt idlers.
Castor Wheels: Two 10.50 x 3.50 and two 12 x 5.00
heavy duty, pneumatic castor wheels.
OUTBOARD CUTTING UNITS
Type: Two, three spindle, side mounted rotary cutting
units each with a 57 in. (145 cm) width of cut.
Trimming Ability: Trims to either side. 58 in. (147cm)
cutting unit offset from outside of wheel to trim side of
side cutting unit on either side.
Height-of-Cut Adjustment: 1/2 in. (12.7 mm)
increments by spacers on all castor shafts.
Cutter Drive: Hydraulic gear motor. Three "B" section
belts to spindles
Castor Wheels: Four 10.50 x 3.50 heavy duty,
interchangeable, pneumatic castor wheels.
Cutting Unit Suspension: Outboard cutting unit arms
pivot from center, sweep cutting units forward in mow
and lift, and rotate cutting units down and back in
transport. Arms have rubber mount design for shock
absorption and more cutting unit floatation (patented).
Adjustable, spring-loaded, breakaway arms release
and rotate outboard cutting unit upon accidental
impact. Automatically reset when cutting unit is raised.
Cam lock links automatically secure outboard cutting
units in transport position.
Machine Width (Approx.):
Transport - 7 ft,11 in. (241 cm).
Mow - 16 ft, 3 in.(495 cm).
Machine Height (Approx.):
Transport - 7 ft, 7 in. (231 cm) - to top of raised cutting
units.
Mow - 4 ft,11 in.(152 cm) - to top of seat back.
Machine Overall Length (Approx.): 14 ft(427 cm).
Total Weight (with fluids) [Approx.]: 6540 lb
(2967 kg).
Accessories:
2-Post Roll Over Protection System
Canopy option
Canopy w/ windshield option
Cab with Roll Over Protection System
Road Light Package
8 ft (244 cm) Rotary Broom
Air Conditioning
7 Foot Snow blower
Leaf Mulcher
Cold Start Kit
Foam Filled Castor Tires
Extra Traction Drive Tire
Specifications and design subject to change without notice.

10
LOOSE PARTS
Note: Use this chart as a checklist to ensure all parts have been shipped.
DESCRIPTION QTY. USE
Deck Tilt Link 1 To secure front cutting unit in vertical position for
service. (Shipped in tool box)
Klik Pin 2 Used with Deck Tilt Link. (Shipped installed)
Operator's Manual 2 Read and understand before operating machine.
Parts Catalog 1
Registration Card 1 Fill Out and Return to Toro.(Shipped in tool box)