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.

3
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)

11
BEFORE OPERATING
CAUTION
Wear safety goggles and rubber gloves
when working with batteries. Charge bat
teries in a well-ventilated place so gases
produced while charging can dissipate.
Since the gases are explosive, keep elec
trical spark and open flame away from
batteries. Do not smoke. Nausea may
result if the gases are inhaled. Unplug
charger from electrical outlet before con
necting to or disconnecting charger leads
from battery posts.
CHECK BATTERIES (Initial preparation)
1. Unlatch the hood and left hand engine side panel
(Fig. 1). Raise and prop hood open and remove the left
side panel. Make sure hood prop is secured in one of
the mounting brackets on hood.
Figure 1
1. Engine Hood
2. Left Side Panel
3. Hood Latches
4. Side Panel
Latch
2. Remove the capscrews securing the battery tray
and slide the tray out (Fig. 2).
3. Check both batteries for charge with a hydrometer.
If batteries check acceptably, slide tray back in place,
secure with capscrews and lockwashers and install
side panel. If batteries require charging, proceed to
step 4.
4. Remove negative (-) battery cables from batteries
(Fig. 2). Connect a 3 to 4 Amp battery charger to the
posts. Charge the batteries at a rate of 3 to 4 Amperes
for 4 to 8 hours.
5. When batteries are fully charged, disconnect
charger from electrical outlet and battery posts.
6. Install negative (-) cable ends, slide tray back in
place, secure with capscrews and install side panel.
Figure 2
1. Battery Tray
2. Tray Mounting Holes
3. Negative (-) Connections
4. Positive (+) Connections
5. Battery Tray Mounting
Screws
CHECK ENGINE OIL (DAILY)
The engine is shipped with 10.6 qt(10.0 l) of oil in the
crankcase. However, check level of oil before and after
the engine is first started.
1. Be sure machine is positioned on a level surface.
2. Unlatch hood and raise and prop it open (Fig. 1).
Make sure hood prop is secured in one of the mounting
brackets on hood.
3. Remove dipstick, wipe with a clean rag (Fig. 3) and
insert into tube until fully seated. Remove dipstick from
tube and check oil level. If oil level is low, remove filler
cap (Fig. 4). Add oil until level is to top notch on
dipstick. DO NOT OVERFILL.
Figure 3
1. Dipstick
1
4. The engine uses any high quality detergent oil
having the American Petroleum Institute - API -
service classification" CD. Oil viscosity
recommendations are:

12
BEFORE OPERATING
AMBIENT TEMPERATURE PROPER
VISCOSITY
-20to 20F (-28.9to -6.7C )
105F (40.6C) and up
20to 105F (-6.7to 40.6C ) SAE 30
SAE 40
SAE 10
Note: Do not use multi-viscosity oils.
Figure 4
1. Engine Oil Fill Cap
1
IMPORTANT: Check oil after every 5 hours
operation or daily. Change oil and filter after the first
50 hours, then change both every 100 hours
operation thereafter. Change oil and filter more
frequently when engine is operated in extremely
dusty or dirty conditions.
5. Insert dipstick into tube and close and latch hood.
CHECK COOLING SYSTEM (DAILY)
The cooling system is filled with a 50/50 solution of
water and permanent ethylene glycol anti-freeze.
Check coolant level at beginning of each day before
starting the engine. Capacity of cooling system is
approximately 3.9 gal (14.7 l).
CAUTION
The best time to check coolant level is
each day before the engine has been
started because coolant system has not
been pressurized. When the engine is hot
and the radiator cap is removed, pressur
ized coolant can escape and cause burns.
If engine coolant is hot, slowly and care
fully remove radiator cap.
1. Unlatch, raise and prop hood open. Make sure
hood prop is secured in one of the mounting brackets
on hood.
2. Remove radiator cap (Fig.5). Level of coolant must
be above the radiator core and about 1 in. (25 mm)
below bottom of filler neck.
Figure 5
1. Radiator Cap
1
3. If coolant level is low, add a 50/50 mixture of water
and ethylene glycol anti-freeze. DO NOT USE
ALCOHOL/METHANOL BASE COOLANTS OR
WATER ONLY. DO NOT OVERFILL.
4. Install radiator cap, close and latch the hood.
CHECK HYDRAULIC SYSTEM FLUID
(DAILY)
1. Fluid level should be checked daily through sight
glass at rear of hydraulic reservoir (Fig. 6). When oil is
cold, level will be slightly below center, but should be in
the middle of the sight glass when the oil is warm.
Figure 6
1. Hydraulic Oil Level Sight Glass 2. Reservoir Fill Cap
2. If oil level is low, add hydraulic oil to the reservoir
(Fig. 6); refer to Machine Fluid Recommendations,
page 8.

13
BEFORE OPERATING
FILL FUEL TANK
CAUTION
Because diesel fuel is flammable, use
caution when storing or handling it. Do not
smoke while filling the fuel tank. Do not fill
the tank while engine is running, hot, or
when machine is in an enclosed area.
Always fill fuel tank outside and wipe up
spilled fuel before starting the engine.
Store fuel in a clean, safety approved
container and keep cap in place. Use
diesel fuel for the engine only; not for any
other purpose.
1. Remove fuel tank cap (Fig. 7).
2. Fill tank to about one inch (25 mm) below bottom
of filler neck with No. 2 diesel fuel. Install cap.
Figure 7
1. Fuel Tank Cap
CHECK TIRE PRESSURE (DAILY)
Since the Groundsmaster 580-D can be operated
under many different types of turf conditions, proper
tire pressure is very important. Use the following as a
guide:
Under Normal mowing conditions and when used
on a wide variety of turf grasses - 15 psi (103.4
kPa) front; 13 psi (89.6 kPa) rear. 50 psi (344.7 kPa)
castors.
When turf is wet and softer than normal - use low
pressure: 12 psi (82.7 kPa) front and 9 psi (62 kPa)
rear.
When turf is dry and harder than normal, use
higher tire pressure: 18 psi (124 kPa) front and
rear.
IMPORTANT: Do not operate in HIGH RANGE for
extended periods when tire pressure is less than 18
psi because tires may be damaged. When tire
pressure exceeds 18 psi, HIGH RANGE may be
used.
CHECK SYSTEMS OPERATION (DAILY)
Start engine. Move the Groundsmaster 580-D, slowly,
to an area where the machine can be checked for
proper function. Check operation of controls, safety
interlock system, engine, hydraulic system, brakes
and cutting units. Refer to Know Your Controls and
Operating Instructions sections for proper procedures.
CHECKING CUTTING UNIT MISMATCH
To assure all cutting units are at the same
height-of-cut:
1. Adjust all cutting units to the highest
height-of-cut. Position all castor arm height-of-cut
spacers to on the underside of the castor arms. Do not
move washers. Leave them in their original position.
Note: Unless all castor wheel axles are not in the same
location, axles do not have to be relocated. All,
however must be in the same holes (Fig.8).
2. Place a flat 4'x8' sheet of 3/4" plywood on a level
surface and lower a cutting unit onto the plywood.
3. Taking each cutting blade in turn, position blade so
it faces fore and aft. Measure from plywood to front tip
of cutter blade and record dimension. All blade heights
on same deck should be within 1/4" (6.3 mm) of one
another. If blade heights meet criteria, proceed to
step 5. If blade heights are not within 1/4" (6.3 mm),
proceed to step 4.
4. To match cutting blade height, transfer washers
from one side of a castor wheel arm to the other. If end
is to be lowered, transfer one or both washers from the
underside to the top. By contrast, if end is to be raised,
transfer washer(s) from the top to the underside. Each
washer is 1/8" (3 mm) thick. Repeat measurement of
blade tip height and record new dimensions.
5. Repeat steps 2-3 on remaining cutting units, and
step 4, if necessary. If washers are transferred on a
outboard cutting unit castor arm, be sure to transfer the
same number on both ends of the castor arm.
6. Compare blade height dimensions of all cutting
units. Blade heights must be within 3/8" (9.5 mm) of
one another. If they are not, determine which cutting
unit height can be changed to compensate for
difference and either transfer washers from bottom to
top to lower unit, or from top to bottom to raise. Transfer
an equal number of washers at all castor wheel
locations to keep cutting unit level - two on front unit,
four on outboard units.

14
BEFORE OPERATING
ADJUSTING HEIGHT-OF-CUT
The height-of-cut is adjustable from 1 to 5-1/2 in.(25
to 140 mm) in 1/2 in.(13 mm) increments. Positioning
the castor wheel axles in the top holes of the castor
forks (Fig. 8) allows Low range height-of-cut settings
from 1 to 4 in. (25 to 102 mm); positioning the castor
wheel axles in the lower holes of the castor forks (Fig. 8)
allows High range height-of-cut settings from 2-1/2
to 5-1/2 in. (63.5 to 140 mm).
Figure 8
1. Start engine, position the machine on a level
surface, lower cutting units to a point where castor
wheels can be removed from arms, set lift levers in
neutral, set parking brake and shut engine off. Remove
ignition key to prevent accidental startup.
2. Position castor wheel axles on all cutting units in
the same hole in the castor forks.
3. On the front cutting unit, remove the hairpin cotter
and clevis pins from the rear castor pivot arms (Fig. 9).
Align the pivot arm holes with selected height-of-cut
bracket holes in the deck frames, insert clevis pins and
install the hairpin cotters (Fig. 9).
Figure 9
1. Hairpin Cotter
2. Clevis Pin
3. Castor Axle mount holes
4. Pivot Arm
4. On all remaining castor wheel assemblies, remove
lynch pin from castor fork shafts (Fig. 10). Remove
castor fork shaft and spacer assembly from the castor
arm (Fig. 10). Place spacers onto castor spindle to
desired height-of-cut setting and install castor fork
shaft in arm (Fig. 9). Install remaining spacers onto
shaft and secure assemblies with the lynch pin
(Fig.10).
Figure 10
1. Lynch Pin
2. Spacers
3. Washers
ADJUSTING SKIDS
After initial set up or if height-of-cut is changed, deck
skids should also be adjusted. Adjust skids by
loosening flange lock nuts (Fig. 11), positioning skid at
specified height (see chart) and re-tightening flange
lock nuts.
Front Cutting Unit
All H.O.C.-3/8" to 1/2" above level surface
Outboard Cutting Units
1" H.O.C.-Skid positioned all the way up
1-1/2" to 3" H.O.C.- Skid positioned 1/2" to 1"
above level surface.
3" and above H.O.C.- Skid positioned all the way
down,
Figure 11
1. Skid

15
CONTROLS
Seat (Fig. 12) - Pull seat adjusting lever (right side)
outward,slide seat fore or aft to desired position and
release lever to lock seat in position. Seat moves 5.9
in.(15 cm) fore and aft in 19/32 in. (15 mm) increments.
Knob at lower center provides infinitely variable weight
adjustment from 110 - 285 lb (49.9 - 129.3 kg).
Figure 12
1. Seat Adjusting Lever
2. Weight Adjusting Knob
3. Weight Indicator
Seat height adjusts vertically to three positions. To
raise: lift seat to first or second click stop; to lower: lift
seat to highest position, then lower to lowest position.
Arm rests pivot up and down.
Warning Light Check Switch (Fig. 13) - Before
beginning operation, press switch button. All lights on
control panel should light. If a light fails to illuminate,
there is an electrical malfunction requiring immediate
repair.
Engine Oil Pressure Warning (Fig. 13) -
Dangerously low engine oil pressure is indicated by
both a warning indicator light and audible signal. When
this occurs, stop the engine immediately to keep
possible engine damage minimal.
No Charge Warning (Fig. 13) - No charge to the
batteries is indicated by a warning indicator light and
audible signal.
Fuel System Warning (Fig. 13) - A warning indicator
light and audible signal warn of water in the fuel and
need for service.
Coolant Temperature Warning (Fig. 13) - If engine
coolant temperature exceeds 215F (101.7C), a
warning indicator light illuminates and audible signal
sounds. If coolant temperature exceeds 230F (110
C), the engine automatically shuts down. Switch resets
automatically when system and engine cools down.
Hour Meter (Fig. 13) - Registers accumulated hours
of engine operation. Useful for determining intervals for
service maintenance and lubrication.
Coolant Temperature Gauge (Fig. 13) - Indicates
temperature of system coolant.
Fuel Gauge (Fig. 13) - Indicates quantity of fuel in fuel
tank.
Figure 13
5. Engine Oil Pressure Warning
6. No Charge Warning
7. Fuel System Warning
8. Warning Light Check Switch
1. Coolant Temperature
Gauge
2. Fuel Gauge
3. Hour Meter
4. Coolant Temperature
Warning
1
23
4
5
67
8
Hydraulic Oil Temperature Warning (Fig. 14) - A
warning indicator light and audible signal warn of
excessively high hydraulic oil temperature.
Figure 14
1. Hydraulic Oil Level Warning
2. Hydraulic Oil Temperature Warning
3. Hydraulic Oil Filter Warning
4. Air Cleaner Warning
5. Alarm silence Button
1
2
3
4
5
Hydraulic Oil Filter Warning (Fig. 14) - A warning
indicator light and audible signal warn the filter is
clogged and in need of service.
Hydraulic Oil Level Warning (Fig. 14) - A warning
indicator light and audible signal warn of low hydraulic
oil level. If oil level drops further, the engine will
automatically be stopped. Engine cannot be restarted
until oil supply is brought to a safe level.

16
CONTROLS
Air Cleaner Warning (Fig. 14) - A warning indicator
light and audible signal warn of a clogged air cleaner
requiring service. These warnings alert that the engine
has been operated in excess of when normal filter
maintenance should have occurred.
Alarm Silence Button (Fig. 14) - Pressing button
silences alarm. Alarm system will disengage and
automatically reset when problem is corrected.
Parking Brake Indicator (Fig. 15) - On steering
column. Alerts operator the parking brake is on.
Figure 15
1. Parking Brake Indicator
2. High Range Speed Mode Indicator
3. Cruise Control Engaged Indicator
4. Parking Brake Knob
5. Tilt Steering Control Lever
High Range Ground Speed Indicator (Fig. 15) - On
steering column. Alerts operator the Groundsmaster
580-D is in high range ground speed mode.
Cruise Control Indicator (Fig. 15) - On steering
column. Alerts operator the cruise control is engaged.
Tilt Steering Control (Fig. 15) - Single lever on right
side of steering column. Pivot lever rearward to release
and move steering column and tower to desired angle.
Pivot lever forward to lock steering column and wheel
in desired position.
Key Switch (Fig. 16) - Three positions: OFF, ON and
START. Rotate key to START and release when engine
begins running. To stop, rotate key to OFF position.
Throttle Control (Fig. 16) - Used to operate engine at
various speeds. Moving throttle forward increases
engine speed - FAST; rearward decreases engine
speed - SLOW.
Figure 16
1. Key Switch
2. Throttle Control
3. Cruise Control Switches
4. Deck Drive / PTO Switch
5. Engine Override Switch
6. High Range/ Low Range Ground Speed Switch
7. Cutting Unit Lift Controls
8. Glow Plug Indicator Light
1
2
7
3
8
4
6
5
Cruise Control Switches (Fig. 16) - Two switches on
panel to right of operator; one for ON/OFF control, the
other for cruise engagement. Cruise control operation,
when in either high range or low range mode, is
disengaged either by actuating the brake pedal or
turning the switch to OFF position.
High Range/Low Range Ground Speed Switch
(Fig. 16) - Single lever allows selection of either high
or low range ground speeds. Push switch forward for
High Range or pull back for Low Range. Switch returns
to neutral position. Switch automatically resets to Low
Range when a cutting unit is lowered, front cutting unit
is not fully raised or if engine is shut off.
Cutting Unit Lift Controls (Fig. 16) - The two outside
levers raise and lower the outside cutting units, the
center lever raises and lowers the front unit. Engine
must be running to lower and raise cutting units.
Cutting unit blades automatically stop whenever the
cutting units are raised. When lowering outside cutting
units, keep control levers actuated until cutting units
pass over center. Units will then "float" down to the turf.
Note: Holding the cutting unit levers in the actuated
position while the units are lowering could drive them
forcefully into the turf and cause cutting unit damage.
After lowering mowers, do not allow levers to snap
back to neutral. This could cause the levers to go past
neutral, lock the cutting units in a non-float mode and
prevent them from following turf contours.

17
CONTROLS
Glow Plug Indicator (Fig.16) - Automatically
actuates proper glow period when ignition key is
turned to ON position. Illuminates when glow plugs are
actuated. When glow plugs are heated sufficiently,
light goes off indicating engine is ready to start.
Deck Drive/PTO Switch (Fig. 16) - Pull sleeve upward
on switch lever and push lever to ENGAGE position
and release to actuate switch; lever will move to neutral
position when released. Move lever to DISENGAGE
position to stop. Switch automatically resets to
DISENGAGE when all three cutting units are raised or
engine is shut off.
Engine Over-ride Switch (Fig. 16 & 17) - If engine
has overheated and been shut-down by the safety
switch, depressing button will allow engine operation.
Use button only for emergencies and only at short
intervals.
Figure 17
1. Engine Over-ride Switch
1
Electrical System - Fuse block (Fig. 18) - The
electrical system is protected by one 5 Amp and two 15
Amp fuses located under the control panel to the
operator's right. A fusible link, located by starter, is
incorporated for the protection of the entire wiring
circuit. The link can be replaced if total loss of electrical
function results. However, the reason for the
malfunction should first be found and corrected.
Figure 18
1. Fuse Block
2. Fusible Link
2
1
Traction Pedal (Fig. 19) - Controls forward and
reverse operation. Depress top of pedal to move
forward and bottom to move in reverse. Ground speed
is dependent upon high range/low range ground
speed mode(slower in low than high range) and
proportionate to how far pedal is depressed.
Steering/Parking Brake Pedals (Fig. 19) - The left
and right turn pedals are connected to the front wheel
brakes. Since both brakes work independently, they
can be used to turn machine more sharply or to
increase traction if one wheel tends to slip while
operating on a hillside. However, wet grass or soft turf
can be damaged when brakes are used for turning. A
brake latch lever locks the two pedals together for
parking. Whenever the engine is shut off, set parking
brake to prevent accidental machine movement. Latch
pedals together, depress them and pull the parking
brake knob at the top of the steering tower up (Fig. 15)
Depress brake pedals to release the parking brake.
Figure 19
1. Traction Pedal
2. Brake Pedal
3. Steering / Parking Brake Pedals
4. Brake Latch Lever
Brake Pedal (Fig. 19) - Single pedal operated by the
right foot actuates fully enclosed, multiple disc front
brakes.
Note: There is dynamic braking through the
closed-loop hydrostatic traction drive system.
Storage (Fig. 20) - A large removable tool storage tray
is located under a hinged floor plate. A small storage
and beverage holder is to the operator's right.
Figure 20
1. Hinged Floor Plate
2. Removable Tool Tray

18
OPERATING INSTRUCTIONS
IMPORTANT: The fuel system must be bled if any of
the following have occurred:
A. Initial start-up of a new machine.
B. Engine has ceased running due to lack of
fuel.
C. Maintenance has been performed upon fuel
system components; i.e., filter replaced,
separator serviced, etc.
Refer to Bleeding Fuel System.
STARTING/STOPPING ENGINE
1. Sit on seat, keep foot off traction pedal. Ensure
parking brake is engaged. Set seat and tilt steering
wheel and tower to comfortable position before
starting engine.
Figure 21
1. PTO Switch
2. Cruise Control Switches
3. HIGH/LOW Range Switch
4. Cutting Unit Lift Controls
5. Throttle Lever
6. Ignition Key Switch
7. Glow Plug Indicator light
1
5
4
2
1
7
3
2. Turn ignition switch to ON position. When glow
plug indicator light goes off, engine is ready to START.
3. Rotate ignition key switch to START position
(Fig. 21). Release key immediately when engine starts
and allow it to return to RUN position.
Note: Do not run starter motor more than 10 seconds
at a time or premature starter failure may result. If
engine fails to start after 10 seconds, turn key to OFF
position. Recheck controls and procedures, wait 10
additional seconds and repeat starting operation.
4. When engine is first started, or after overhaul of the
engine, hydrostatic transmission, steering or wheel
drive, operate machine in forward and reverse for one
to two minutes. Turn steering wheel left and right to
check steering response and operate the lift levers to
check for proper operation. Then, shut engine off, set
parking brake and check for oil leaks, loose parts or
other malfunctions.
CAUTION
Shut engine off and wait for all moving
parts to stop before checking for oil leaks,
loose parts or other difficulties.
5. Before stopping engine, move HIGH/LOW RANGE
ground speed switch to LOW, disengage PTO and
cruise control switches and move lift levers and traction
pedal to neutral. Move throttle control to SLOW
position. Set parking brake and turn ignition key to
OFF position.
BLEEDING FUEL SYSTEM
1. Unlatch, raise and prop engine hood open and
remove left side panel (Fig. 22).
Figure 22
1. Engine Hood
2. Left Side Panel
3. Hood Latches
4. Side Panel Latch
2. At lower left side of engine, loosen air bleed screw
at top of fuel filter/water separator (Fig. 23).
Figure 23
1. Fuel Filter / Water Separator
Note: If fuel tank is over half full, gravity will fill the fuel
filter. If tank is less than half full, fill tank.

19
OPERATING INSTRUCTIONS
3. Loosen air vent plug on engine fuel filter assembly
about 1-1/2 turns (Fig. 24).
4. Rotate priming pump (Fig. 25) counter-clockwise
until spring in pump assembly releases. Operate pump
up and down until a solid stream of fuel flows out
around filter plug and tighten plug.
Figure 24
1. Fuel Filter Air Bleed Plug
1
5. Loosen air vent plug on injection pump about
1-1/2 turns (Fig. 25). Operate priming pump until solid
stream of fuel flows from the vent hole (Fig. 25), then
tighten air vent plug.
6. Push priming pump down to compress spring and
rotate clockwise to lock closed.
7. Try to start engine. If engine starts, install left side
panel, lower hood and resume operation. If engine
does not start, repeat steps 2-7.
Figure 25
1. Priming Pump
2. Injection Pump Air Bleed plug
1
2
DIAGNOSTIC LIGHT
The GM 580-D is equipped with a diagnostic light
which indicates if the electronic controller is
functioning correctly. The green diagnostic light is
located under the control panel. When the electronic
controller is functioning correctly and the key switch is
moved to the ON position, the controller diagnostic
light will be illuminated. The light will blink if the
controller detects a malfunction in the electrical
system. The light will stop blinking and automatically
reset when the key switch is turned to the OFF position.
Figure 26
1. Electronic Controller Light
1
When the controller diagnostic light blinks, one of the
following outputs has been detected in the controller:
1. One of the outputs has been shorted.
2. One of the outputs is open circuited.
Using the diagnostic display, determine which output
is malfunctioning, refer to Checking Interlock
Switches.
If the diagnostic light is not illuminated when the key
switch is in the ON position, this indicates that the
electronic controller is not operating. Possible causes
are:
1. Loopback is not connected.
2. Fuses are blown.
3. The light is burned out.
4. Not functioning correctly.
5. Fusible links are blown
Check electrical connections, input fuses and
diagnostic light bulb to determine malfunction. Make
sure loopback connector is secured to wire harness
connector.
Note: If the diagnostic light flashes during normal
operation of the machine, do not turn off the machine,
toggle to the output and touch any switch. The LED will
flash indicating the source of the failure.
DIAGNOSTIC ACE DISPLAY
The GM 580-D is equipped with an electronic
controller which controls most machine functions. The
controller determines what function is required for
various input switches (i.e. seat switch, key switch,
etc.) and turns on the outputs to actuate solenoids or
relays for the requested machine function.
For the electronic controller to control the machine as
desired, each of the input switches, output solenoids
and relays must be connected and functioning
properly.
The Diagnostic ACE display is a tool to help the user
verify correct electrical functions of the machine.

20
OPERATING INSTRUCTIONS
CHECKING INTERLOCK SWITCHES
The purpose of the interlock switches are to prevent
the engine from cranking or starting unless the traction
pedal is in NEUTRAL, to ensure cutting units
disengage when raised or when operator leaves the
seat. In addition, the engine will stop when the traction
pedal is depressed with operator off the seat.
THE INTERLOCK SWITCHES ARE FOR
THE PROTECTION OF THE OPERATOR
AND BYSTANDERS, AND TO ENSURE
CORRECT OPERATION OF THE MA
CHINE, SO DO NOT BYPASS OR DISCON
NECT THEM. CHECK OPERATION OF THE
SWITCHES DAILY TO ASSURE INTER
LOCK SYSTEM IS OPERATING. IF A
SWITCH IS DEFECTIVE, REPLACE IT BE
FORE OPERATING. THE CONTROLLER
HAS THE ABILITY TO DETECT BYPASSED
SWITCHES AND MAY PREVENT THE OP
ERATION OF THE MACHINE IF SWITCHES
ARE BYPASSED. DO NOT RELY ENTIRELY
ON SAFETY SWITCHES - USE COMMON
SENSE!
CAUTION
To verify interlock switch function:
1. Park machine on a level surface, lower the cutting
units, stop the engine and engage the parking brake.
2. Open control panel cover. Locate wire harness and
connectors near controller. Carefully unplug loop back
connector from harness connector (Fig. 27).
Figure 27
1. Wire Harness and Connectors
1
3. Connect the Diagnostic ACE display connector
(Fig. 28) to the harness connector. Make sure correct
overlay decal is positioned on Diagnostic ACE display.
4. Turn the key switch to the ON position, but do not
start machine.
Figure 28
1. Diagnostic ACE
Note: The red text on the overlay decal refers to input
switches and the green text refers to outputs.
5. The inputs displayed" LED, on lower right column
of the Diagnostic ACE, should be illuminated. If
outputs displayed" LED is illuminated, press the
toggle button, on Diagnostic ACE, to change LED to
inputs displayed".
6. The Diagnostic ACE will illuminate the LED
associated with each of the inputs when that input
switch is closed.
Individually, change each of the switches from open to
closed (i.e., sit on seat, engage traction pedal, etc.),
and note that the appropriate LED on Diagnostic ACE
will blink on and off when corresponding switch is
closed and opened. Repeat on each switch that it is
possible to be changed by hand.
7. If switch is closed and appropriate LED does not
blink on and off, check all wiring and connections to
switch and/or check switches with an ohm meter.
Replace any defective switches and repair any
defective wiring.
Now start engine and raise and lower each cutting unit.
Note the appropriate LED on the Diagnostic ACE (i.e.
LED is illuminated when cutting unit is lowered and
LED is not illuminated when cutting unit is raised.
The Diagnostic ACE also has the ability to detect which
output solenoids or relays are turned on. This is a quick
way to determine if a machine malfunction is electrical
or hydraulic.
To verify output function:
1. Park machine on a level surface, lower the cutting
units, stop the engine and engage the parking brake.
2. Open control panel cover. Locate wire harness and
connectors near controller. Carefully unplug loopback
connector from harness connector.