How it Works
Kubota
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zd 331
User Manual
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Kubota zd 331 User Manual

CONTENTS
SAFE OPERATION ................................................................................................. 1
SERVICING OF MACHINE ......................................................................................... 1
SPECIFICATIONS....................................................................................................... 3
IMPLEMENT LIMITATIONS ........................................................................................ 6
INSTRUMENT PANEL AND CONTROLS................................................................... 7
MOWER MOUNTING .................................................................................................. 9
MOUNTING THE MOWER DECK ........................................................................... 9
DISMOUNTING THE MOWER DECK ................................................................... 10
OPERATING THE ENGINE....................................................................................... 11
Key Switch......................................................................................................................13
Immediately Stop the Engine if:......................................................................................14
Easy Checker (TM)......................................................................................................... 14
Fuel Valve, Fuel Gauge and Warning Lamp...................................................................14
Coolant Temperature Gauge..........................................................................................15
Hour Meter......................................................................................................................16
Warm-up and Transmission Oil in the Low Temperature Range....................................16
Engine Stop Lever (Inside the Hood).............................................................................. 18
OPERATING THE MACHINE.................................................................................... 19
Changing Lubricating Oil for New Machines...................................................................19
Engine Break-in ..............................................................................................................19
Machine Break-in............................................................................................................19
To Fold the ROPS ..........................................................................................................20
To Raise the ROPS to Upright Position.......................................................................... 21
Adjustment of Foldable ROPS........................................................................................ 21
Operator's Seat...............................................................................................................22
Seat Belt .........................................................................................................................23
Hydraulic Lift Control Pedal ............................................................................................23
Throttle Lever..................................................................................................................23
Parking Brake Pedal.......................................................................................................24
Motion Control Lever ......................................................................................................24
CONTENTS
OPERATING THE MOWER ...................................................................................... 29
MAKING THE MOST OF YOUR MOWER............................................................. 29
PTO Lever ......................................................................................................................32
Starting ...........................................................................................................................32
TIRES AND WHEELS ............................................................................................... 33
Inflation Pressure............................................................................................................33
Remove and Install Front Caster Wheels.......................................................................34
MAINTENANCE......................................................................................................... 35
PERIODIC SERVICE CHART LABEL ................................................................... 37
LUBRICANTS ........................................................................................................ 38
PERIODIC SERVICE................................................................................................. 40
Hood ...............................................................................................................................40
Front Cover.....................................................................................................................40
Step ................................................................................................................................40
HOW TO RAISE THE OPERATOR'S SEAT.......................................................... 41
Front side:.......................................................................................................................44
Rear side: .......................................................................................................................44
Checking Engine Oil Level.............................................................................................. 45
Checking Amount of Fuel and Refueling ........................................................................46
Checking and Cleaning Radiator Screen and Bonnet Screen to Prevent Overheating.. 46
Checking Tire Pressure .................................................................................................. 47
Inflation Pressure............................................................................................................47
Checking Transmission Fluid Level................................................................................48
Checking Coolant Level..................................................................................................48
Lubricating All Grease Fittings........................................................................................ 49
Safety Devices................................................................................................................49
Checking Gear Box Oil Level..........................................................................................50
Greasing .........................................................................................................................51
Oiling...............................................................................................................................52
Cleaning Air Cleaner Primary Element ........................................................................... 53
Checking Fuel Lines and Fuel Filter ...............................................................................53
CONTENTS
Adjusting Fan Drive Belt Tension ...................................................................................54
Adjusting Parking Brake .................................................................................................54
Battery Condition ............................................................................................................56
Changing Gear Box Oil................................................................................................... 57
Changing Engine Oil....................................................................................................... 58
Replacing Engine Oil Filter Cartridge .............................................................................58
Checking Radiator Hose and Clamp ..............................................................................59
Checking Hydraulic Hose ...............................................................................................59
Replacing HST Transmission Oil Filter Cartridge...........................................................60
Adjusting the Motion Control Lever Pivot........................................................................60
Adjusting Front Axle Pivot...............................................................................................61
Checking Intake Air Line................................................................................................. 61
Changing Transmission Fluid and Rear Axle Gear Case Oil (RH & LH)........................61
Replacing Hydraulic Oil Filter Cartridge..........................................................................62
Replacing Fuel Filter.......................................................................................................63
Checking Fuel Injection Nozzle (Injection Pressure) ......................................................63
Checking Injection Pump................................................................................................63
Replacing Air Cleaner Primary Element and Secondary Element.................................. 63
Flush Cooling System and Changing Coolant................................................................64
Anti-freeze ......................................................................................................................65
Replacing Hydraulic Hose ..............................................................................................66
Replacing Fuel Lines ......................................................................................................66
Replacing Radiator Hose................................................................................................66
Replacing Mower Gear Box Oil-Seal..............................................................................66
Replacing Intake Air Line................................................................................................ 66
Replacing Fuses.............................................................................................................66
Checking and Replacing Blade.......................................................................................67
Mower Belt Replacement................................................................................................69
Bleeding Fuel System..................................................................................................... 69
ADJUSTMENT........................................................................................................... 70
HST NEUTRAL............................................................................................................... 70
MOTION CONTROL LEVER NEUTRAL POSITION ...................................................... 71
MAXIMUM SPEED (FORWARD) ...................................................................................71
MOTION CONTROL LEVER ALIGNMENT .................................................................... 71
ANTI-SCALP ROLLERS................................................................................................. 72
LEVEL MOWER DECK (Side-to-Side) ........................................................................... 73
LEVEL MOWER DECK (Front-to-Rear) .........................................................................74
GENERAL TORQUE SPECIFICATION ................................................................. 76
STORAGE ................................................................................................................. 78
CONTENTS
TROUBLESHOOTING............................................................................................... 79
BATTERY TROUBLESHOOTING ......................................................................... 80
MACHINE TROUBLESHOOTING ......................................................................... 80
MOWER TROUBLESHOOTING............................................................................ 81
1SAFE OPERATION
SAFE OPERATION
Careful operation is your best insurance against an accident. Read and understand this manual carefully before operating the machine. All operators, no matter how much experience they may have had, should read this and other related manuals before operating the machine or any implement attached to it. It is the owner's obligation to instruct all operators in safe operation. This mowing machine is capable of amputating hands and feet and throwing objects. Failure to observe the following safety instructions could result in serious injury or death.
1. The ZERO TURN MOWING MACHINE has different steering characteristics than other machines with a steering wheel and does not have a service brake pedal (but, has a parking brake lock pedal that can be used to stop the machine in an emergency. Normal slowing down and stopping is done with the motion control levers.). Read and understand the operators manual before operating the machine. Practice operating machine at low engine speed without mower engaged in an unobstructed area.
2. Know your equipment and its limitations. Read all instructions in this manual before attempting to start and operate the machine.
3. Pay special attention to the warning, caution and danger labels on the machine itself.
4. KUBOTA recommends the use of a Roll Over Protective Structures (ROPS) and seat belt in almost all applications. This combination will reduce the risk of serious injury or death, should the machine be upset. The machine is equipped with a Foldable ROPS, which may be temporarily folded down only when absolutely necessary for areas with height constraints. (There is no operator protection provided by the ROPS in the folded position. For operator safety the ROPS should be placed in the upright and locked position and the seat belt fastened for all other operations.) If the ROPS is loosened or removed for any reason, make sure that all parts are reinstalled correctly before operating the machine. Never modify or repair a ROPS because welding, bending, drilling, grinding, or cutting may weaken the structure. A damaged ROPS structure must be replaced, not repaired or revised. If any structural member of the ROPS is damaged, replace the entire structure at your local KUBOTA Dealer.
5. Always use the seat belt when the ROPS are upright. Do not use the seat belt if the ROPS is down or if there is no ROPS. Check the seat belt regularly and replace if frayed or damaged.
6. Do not operate the machine or any attachments while under the influence of alcohol, medication, controlled substances or when fatigued.
7. Do not wear loose, torn, or bulky clothing around machine. The clothing may catch on moving parts or controls, leading to the risk of accident. Wear and use any additional safety items such as hard hat, safety boots or shoes, eye and hearing protection, gloves, etc. As appropriate or required.
8. Do not wear radio or music headphones while operating the machine. Safe operation requires your full attention.
9. Carefully check the vicinity before operating machine or any implement attached to it. Clear the work area of objects (wires, rocks, etc.) that might be picked up and thrown. Check for overhead clearance which may interfere with a grass catcher.
10.Check brakes and other mechanical parts for correct adjustment and wear. Replace worn or damaged parts promptly. Check the tightness of all nuts and bolts regularly. (For further details, see "PERIODIC SERVICE" and "ADJUSTMENT" section.)
11.Keep all shields and guards in place. Replace any that are damaged or missing.
12.Before allowing other people to use your machine, explain how to operate and have them read this manual before operation.
13.Do not allow any bystanders around or near machine during operation.
1. BEFORE OPERATING
(1) ROPS (2) Seat belt
SAFE OPERATION2
14.Do not allow passengers, children or non-qualified operators on the machine at any time. The operator must remain in the machine seat throughout operation.
15.In addition to the design and configuration of equipment, hazard control and accident prevention are dependent upon the awareness, concern, and prudence of personnel involved in the operation, transport, maintenance of facilities.
16.Keep the machine and attachments in good operating condition and keep safety devices in place and in proper working condition.
17.Do not modify the machine. Unauthorized modification may affect the function of the machine, which may result in personal injury.
18.Use only implements recommended by KUBOTA. Use proper ballast to front or rear of machine to reduce the risk of upsets. Follow the "Safe Operation" procedures, specified in the manuals with equipment.
19.Keep your machine clean. Accumulations of dirt, grease, and trash can contribute to fires and lead to personal injury.
20.The exhaust gas from the muffler is very hot. To prevent fire, do not expose dry grass, mowed grass, oil and any other combustible materials to exhaust gas. Use a spark arrester where required. Also keep the engine and muffler clean all the time.
C Starting
1. Always sit in the operator's seat when starting engine or operating levers or controls.
2. Before starting the engine make sure that the motion control levers are in neutral lock, the parking brake is applied, and Power Take Off (PTO) is disengaged (OFF).
3. Do not start engine by shorting across starter terminals. The machine may start in gear and move if normal starting circuitry is bypassed.
4. Do not operate or idle engine in a non-ventilated area. Carbon monoxide gas is colorless, odorless, and deadly.
5. Do not start engine while titling deck.
C Working
1. Do not turn sharply when driving at high speed.
2. To avoid tip over, slow down when turning on uneven terrain or before stopping.
3. Do not operate near ditches, holes, embankments, or other terrain, which may collapse under the machine weight. The risk of machine tip over increases when the ground is loose or wet.
4. Park the machine on the firm and level surface.
5. Watch where you are going at all times. Watch for and avoid obstacles. Be alert at curbs, near trees, and other obstructions and hidden hazards.
6. Know what is behind you before backing up. Look to the rear before and when backing. Do not mow while in reverse unless absolutely necessary and make sure the area immediately behind you is clear of obstructions or holes and small children. Use extra caution when machine is equipped with Grass Catcher. Your view to the rear is restricted.
7. When working in groups, always let others know what you are doing ahead of time.
8. Do not drive machine on streets or highways. Watch for traffic when you cross roads or operate near roads.
9. Be aware of the mower discharge direction and do not point it at anyone.
10.When using any attachments, never direct discharge material toward bystanders. Do not allow anyone near the attachments while in operation. Do not mow when bystanders are present in the mowing area.
11.To reduce fire hazards, keep the engine exhaust area free of grass or leaves.
12.Be sure rotating blades and engine are stopped and the key is removed before placing hands or feet near blades and cleaning blockages or unclogging chute.
13.Shut the engine off and wait for all movement to stop before removing grass catcher or unclogging chute.
14.Always inspect the mower for damage after striking a foreign object. Repair or replace any damaged parts before restarting.
15.Operate during daylight or in bright artificial light.
C Children
Tragic accidents can occur if the operator is not alert to the presence of children. Children are attracted to the machine and the mowing activity. Never assume that children will remain where you last saw them.
1. Keep children out of the mowing area and under the watchful care of another responsible adult.
2. Be alert and turn machine off if children enter the area.
3. Before and when backing, look behind and down for small children.
4. Never carry children. They may fall off and be seriously injured or interfere with safe machine operation.
5. Never allow children to operate the machine, even under adult supervision. Local regulation can restrict the age of the operator.
6. Use extra care when approaching blind corners, shrubs, trees, or other obstructions that might hide children from sight.
7. Do not mow in reverse unless it is absolutely necessary.
2. OPERATING
3SAFE OPERATION
C Operators, age 60 years and above
Data indicates that operators, age 60 years and above, are involved in a large percentage of machine-related injuries. These operators should evaluate their ability to operate the machine safely enough to protect themselves and others from serious injury.
C Operation on slopes
Slopes are major factor related to loss-of-control and tip­over accidents, which can result in severe injury or death. All slopes require extra caution. If you cannot back up the slope or if you feel uneasy on it, do not mow it. If the engine stops when operating on a slope apply the parking brake immediately to prevent machine run away.
DO
1. To avoid tip over, operate across the slopes not up and down. Stay off hills and slopes too steep for safe operation.
2. Remove obstacles such as rocks, tree limbs, etc.
3. Stay alert for holes in the terrain and other hidden hazards. Keep away from drop-offs. Uneven terrain could overturn the machine. Tall grass can hide obstacles.
4. Follow the manufacturer's recommendations for wheel weight or counterweights to improve stability.
5. Keep all movement on the slopes slow and gradual. Do not make sudden changes in speed or direction.
6. Avoid starting or stopping on a slope. If tires lose traction, disengage PTO and proceed slowly straight down the slope.
7. Reduce speed and exercise extreme caution on slopes and in sharp turns to prevent tip-over or loss of control.
8. Use special caution when changing direction on slopes. Slow down, and use extra caution when changing direction on a slope.
DO NOT
1. Do not turn on slopes unless necessary. If necessary, turn uphill slowly and gradually.
2. Do not mow near drop-offs, ditches, or embankments. The mower could suddenly turn over if a wheel is over the edge of cliff or ditch, or if an edge caves in.
3. Do not mow on wet grass. Reduced traction could cause sliding and loss of control.
4. Do not try to stabilize the machine by putting your foot on the ground.
5. Do not use grass catcher on steep slopes.
6. Do not start or stop suddenly when going uphill or downhill. Avoid sudden start and stops on slopes.
7. Never "freewheel". Do not let the machine travel downhill with motion control levers at neutral lock position or in neutral.
8. Do not operate machine without the mower deck installed.
C Stopping
1. Park the machine on level ground.
2. Make sure that the machine and all attachments have come to a complete stop before dismounting.
3. Before dismounting, apply parking brake, place the motion control levers in their neutral lock positions, disengage the PTO, lower all attachments to the ground, turn off the engine, and remove the key.
4. Do not park the machine on dry grass or leaves.
1. Before installing or using PTO-driven equipment, read the manufacturer's manual and review the safety labels attached to the equipment.
2. Wait until all moving components have completely stopped before connecting, disconnecting, adjusting, cleaning, or servicing any PTO-driven equipment.
3. Use the PTO with KUBOTA approved attachments.
The speed of PTO: ZD321 / ZD326 2530 rpm at 3200 engine rpm ZD331 2538 rpm at 3000 engine rpm
1. Use lift link only with authorized attachments designed for lift link usage.
1. Disengage power to attachment(s) when transporting or not in use.
2. Do not tow this machine. Use a suitable truck or trailer when transporting on public roads.
3. Use extra care when loading or unloading the machine into a trailer or truck.
4. This machine is not allowed to be used on public roads.
3. USING THE PTO
4. USING THE LIFT LINK
5. TRANSPORTING
SAFE OPERATION4
C Servicing
1. Before servicing, park the machine on a firm, level surface and apply the parking brake. Remove the key to prevent accidental start-up.
2. Allow the machine time to cool before touching the engine, muffler, radiator, etc.
3. Always stop the engine before refueling. Avoid spills and overfilling. Wipe up spilled fuel immediately.
4. Use extra care in handling diesel fuels. They are flammable. (1) Use only an approved container. (2) Do not remove fuel cap or refuel with the engine
running. Allow engine to cool before refueling. Do not smoke while refueling or when standing near fuel.
(3) Do not refuel the machine indoors and always
clean up spilled fuel or oil.
(4) Do not store the machine or fuel container inside
where there is an open flame, such as in a water heater.
5. Do not smoke when working around battery or when refueling. Keep all sparks and flames away from battery and fuel tank. A battery, especially when charging, will give off hydrogen and oxygen gases, which can explode and cause serious personal injury.
6. Before "jump starting" a dead battery, read and follow all the instructions.
7. Disconnect the battery's ground cable before working on or near electric components.
8. Do not use or charge the refillable type battery if the fluid level is below the LOWER (lower limit level) mark. Otherwise, the battery component parts may prematurely deteriorate, which may shorten the battery's service life or cause an explosion. Check the fluid level regularly and add distilled water as required so that the fluid level is between the UPPER and LOWER levels.
9. Keep first aid kit and fire extinguisher handy at all times.
10.Do not remove the radiator cap while coolant is hot. When cool, slowly rotate cap to the first stop and allow sufficient time for excess pressure to escape before removing the cap completely. If the machine has a coolant recovery tank, add coolant there instead of the radiator.
11.Do not attempt to mount a tire on a rim unless qualified to do so and all proper safety precautions are followed.
12.Always maintain the correct tire inflation pressure. Do not inflate tires above the recommended pressure shown in the Operator's Manual.
13.Provide adequate support when changing wheels.
14.Make sure that wheel nuts and bolts have been tightened to the specified torque.
15.Escaping hydraulic fluid under pressure has sufficient force to penetrate the skin causing serious personal injury. Before disconnecting lines, be sure to relieve all pressure. Before applying pressure to the system, make sure all connections are tight and that lines, pipes, and hoses are not damaged.
6. SERVICING AND STORAGE
(1) Fuel tank cap
5SAFE OPERATION
16.Fluid escaping from pinholes may be invisible. Use a piece of cardboard or wood to search for suspected leaks: do not use hands. Use safety goggles or other eye protection. If injured by escaping fluid, see a medical doctor at once. Serious infection or reaction will result if proper medical treatment is not administered immediately. This fluid can produce gangrene or severe allergic reaction.
17.Do not make adjustments or repairs with the engine running.
18.Keep machine free of grass, leaves, or other debris build-up.
19.Do not change the engine governor setting or overspeed the engine.
20.Do not run a machine inside a closed area.
21.Mower blades are sharp and can cut your hands. Wrap the blade(s) or wear gloves, and use extra caution when servicing them.
22.Keep nuts and bolts, especially blade attachment bolts, tight and keep equipment in good condition.
23.Never tamper with safety devices. Check their operation for proper function regularly.
24.Waste products such as used oil, fuel, coolant, brake fluid, and batteries, can harm the environment, people, pets and wildlife. Please dispose of properly.
25.Do not use beverage containers for waste fluids or other products. Someone, particularly children, may drink them by mistake.
26.Securely support machine or any machine elements with stands or suitable blocking before working underneath. For your safety do not rely or hydraulically supported devices, they may leak down, suddenly drop or be accidently lowered.
27.See your local Recycling Center or KUBOTA Dealer to learn how to recycle or get rid of waste products.
A A Material Safety Data Sheet (MSDS) provides
specific details on chemical products; physical and health hazards, safety procedures, and emergency response techniques. The seller of the chemical products used with your machine is responsible for providing the MSDS for that product upon request.
C Storage
1. Keep the machine and supply of fuel in locked storage and remove the ignition key to prevent children or others from playing or tampering with them.
2. To avoid sparks from an accidental short circuit, always disconnect the battery's ground cable (-) first and reconnect it last.
3. To avoid the danger of exhaust fume poisoning, do not operate the engine in a closed building without adequate ventilation.
4. To reduce fire hazards, clean the machine thoroughly before storage. Dry grass and leaves around the engine and muffler may ignite.
(1) Cardboard (2) Hydraulic line (3) Magnifying glass
(1) Battery (2) Ground cable
(+): Positive terminal (-): Negative terminal
SAFE OPERATION6
7. DANGER, WARNING AND CAUTION LABELS
7SAFE OPERATION
SAFE OPERATION8
9SAFE OPERATION
1. Keep danger, warning and caution labels clean and free from obstructing material.
2. Clean danger, warning and caution labels with soap and water, and dry with a soft cloth.
3. Replace damaged or missing danger, warning and caution labels with new labels from your local KUBOTA Dealer.
4. If a component with danger, warning and caution label(s) affixed is replaced with new part, make sure new label(s) is (are) attached in the same location(s) as the replaced component.
5. Mount new danger, warning and caution labels by applying on a clean dry surface and pressing any bubbles to outside edge.
8. CARE OF DANGER, WARNING, AND CAUTION LABELS
1SERVICING OF MACHINE
SERVICING OF MACHINE
After reading this manual thoroughly, you will find that you can do some of the regular maintenance yourself. Your dealer is interested in helping you get the best performance from your new machine and wants to help you get the most value from it. When in need of parts or major service, be sure to see your KUBOTA Dealer. When in need of parts, be prepared to give your dealer the machine, engine and mower serial numbers.
Locate the serial numbers now and record them in the space provided.
Type Serial No.
Machine
Engine
Mower
Date of Purchase
Name of Dealer
(To be filled in by purchaser)
(1) Machine identification plate (2) Machine serial No.
(1) Engine serial No.
(1) Engine serial No.
(1) Mower identification plate (2) Mower serial No.
SERVICING OF MACHINE2
(1) Mower identification plate (2) Mower serial No.
(1) ROPS serial No.
3SPECIFICATIONS
SPECIFICATIONS
Model ZD321N ZD321 ZD326S ZD326P ZD331P ZD331LP
Engine
Model D782-E3-ZD D1005-E3-ZD-2 D1305-E3-ZD
Max. engine power (Gross)
kW (HP) 15.7 (21) (*1) 19.4 (26) (*1) 23.1 (31) (*1)
Type Liquid-cooled
Number of cylinders 3
Bore and stroke mm (in.)
67 x 73.6
(2.64 x 2.80)
76 x 73.6
(2.99 x 2.90)
78 x 88.0
(3.07 x 3.46)
Total displacement cm (cu. in.) 778 (47.5) 1001 (61.1) 1261 (77.0)
Rated revolution rpm 3200 3000
Fuel
Diesel fuel No.1 [below -10 (14 )] Diesel fuel No.2 [above -10 (14 )]
Starter Electric starter with battery, glow plug, 12V, 1.1kW
Lubrication Forced lubrication by gear pump
Cooling Liquid with pressurized radiator
Battery 51R (12V, RC:70min, CCA:450A)
Capacities
Fuel tank L (U.S.gals.) 49 (12.9)
Engine crankcase (with filter)
L (U.S.qts.) 3.5 (3.70) 3.9 (4.1) 5.7 (6.0)
Engine coolant L (U.S.qts.) 2.7 (2.85) 3.5 (3.70)
Recovery tank L (U.S.qts.) 0.25 (0.26)
Transmission case including Rear axle gear case
L (U.S.qts.) 12.1 (12.8) (*3)
Dimensions
Overall length mm (in.) 2185 (86.0) 2220 (87.4) 2335 (91.9)
Overall width w/o mower deck
mm (in.) 1365 (53.7) 1460 (57.5)
Overall height
With ROPS upright
mm (in.) 1915(75.4)
With ROPS folded
mm (in.) 1555 (61.2)
Wheelbase mm (in.) 1410 (55.5) 1525 (60.0)
Min. ground clearance mm (in.)
130 (5.12)
W/54",W/60"
130 (5.12)
W/60"
130 (5.12)
W/60",W/72"
Tread
Front mm (in.) 975 (38.4) 1070 (42.1)
Rear mm (in.) 1100 (43.3) 1150 (45.3)
Weight (W/MOWER DECK)
kg (lbs.)
730 (1609)
with 54"
755 (1664)
with 60"
798 (1759)
with 60"
813 (1792)
with 60"
820 (1808)
with 60"
845 (1863)
with 72"
4 SPECIFICATIONS
Traveling system
Tires
Front 15 x 6.0 - 6 (4PR) Rib 15 x 6.0 - 6 (Semi-pneumatic Non Flat Tire) Rib
Rear
26 x 10.5 - 12
(4PR) Turf
26 x 12.0 - 12 (4PR) Turf
Traveling speeds
Forward mph (km/h) 0 to 9.3 (0 to 15.0) 0 to 10.6 (0 to 17.0) (*2)
Reverse mph (km/h) 0 to 5.2 (0 to 8.3) 0 to 5.3 (0 to 8.5) (*2)
Steering 2 - Hand levers
Transmission 2 - HST w / Gear
Parking brake Wet multi disk / Foot applied, released
Min. turning radius mm (in.) 0 (0)
PTO
Revolution
1 speed
(2530 rpm at 3200 engine rpm)
1 speed
(2538 rpm at 3000 engine rpm)
Drive system Shaft drive, KUBOTA 10 tooth involute spline
Clutch type Wet multi disks
PTO brake Wet single disk
(Specifications and design subject to change without notice)
NOTE: *1: Manufacturer's estimate *2: At 3200 engine rpm [ZD321, ZD326] At 3000 engine rpm [ZD331] *3: Oil amount when the oil level is at the upper level.
Model ZD321N ZD321 ZD326S ZD326P ZD331P ZD331LP
5SPECIFICATIONS
*1: Engine Max rpm
Model RCK54P-321Z RCK60P-331Z RCK72P-331Z
PRO Commercial Deck (F abricated deck)
Suitable machine ZD321N
ZD321, ZD326S,
ZD326P, ZD331P
ZD331LP
Mounting method Quick joint, Parallel linkage
Adjustment of cutting height Dial gauge
Cutting width mm (in.) 1375 (54) 1524 (60.0) 1829 (72.0)
Cutting height mm (in.) 25 to 127 (1.0 to 5.0)
Weight (Approx.) kg (lbs.) 128 (281) 148 (327) 169 (373)
Blade spindle speed r/s (rpm) 58.8 (3530) *1 56.0 (3360) *1 47.2 (2830) *1
Blade tip velocity
m/s
(fpm)
87.8 (17300)*1 92.0 (18100)*1 92.6 (18200)*1
Blade length mm (in.) 475 (18.7) 523 (20.6) 625 (24.6)
Number of blades 3
Dimensions
Total length mm (in.) 940 (37.0) 1002 (39.4) 1170 (46.1)
Total width mm (in.) 1704 (67.1) 1911 (75.2) 2224 (87.6)
Total height mm (in.) 353 (13.9) 358 (14.1)
6 IMPLEMENT LIMITATIONS
IMPLEMENT LIMITATIONS
The KUBOTA Machine has been thoroughly tested for proper performance with implements sold or approved by KUBOTA. Use with implements which are not sold or approved by KUBOTA and which exceed the maximum specifications listed below, or which are otherwise unfit for use with the KUBOTA Machine may result in malfunctions or failures of the machine, damage to other property and injury to the operator or others. [Any malfunctions or failures of the machine resulting from use with improper implements are not covered by the warranty.]
Maximum loading weight
Implement weight W Maximum total weight
Front axle Wf Rear axle Wr
ZD321 [N]
200 kg (440 lbs.) 920 kg (2028 lbs.) 200 kg (440 lbs.) 1120 kg (2468 lbs.)ZD326P [S]
ZD331P [L]
7INSTRUMENT PANEL AND CONTROLS
INSTRUMENT PANEL AND CONTROLS
ILLUSTRATED CONTENTS ILLUSTRATED CONTENTS
(1) Parking brake pedal.......................... 11, 24 (9) Coolant temperature gauge.................. 15
(2) Parking brake lock pedal...................... 11, 24 (10) Fuel gauge (LH tank only)..................... 14
(3) Motion control lever.............................. 11, 24 (11) Key switch............................................ 13
(4) Cup holder............................................ - (12) Easy checker (TM)............................... 14
(5) Seat belt............................................... 23 (13) Cutting height control dial..................... 29
(6) Operator's seat..................................... 22 (14) Hour meter........................................... 16
(7) Hydraulic lift control pedal (DOWN)...... 23 (15) PTO lever............................................. 32
(8) Hydraulic lift control pedal (UP)............ 23 (16) Throttle lever........................................ 23
INSTRUMENT PANEL AND CONTROLS8
ILLUSTRATED CONTENTS
(1) Anti-scalp roller (Front, swivel type).......... 29
(2) Anti-scalp roller (Front)............................. 29
(3) Anti-scalp roller (Rear)............................. 29
9MOWER MOUNTING
MOWER MOUNTING
MOUNTING THE MOWER DECK
To avoid personal injury:
A Park the machine on a firm and level surface. A Apply the parking brake. A Stop the engine and remove the key.
1. Before mounting the mower deck, raise the lift links to the full up position.
2. Adjust the cutting height control dial to 1 in. position.
3. Tilt-up the machine with the maintenance lift system. (See "HOW TO TILT UP THE MACHINE" in "PERIODIC SERVICE" section.)
4. Place the mower deck at the right side of the machine.
5. Slide the mower deck under the machine, and make sure that the mower gear case is placed properly in the center of the machine, lower the axle from the tilt-up position to the normal position.
A For easy installation set the anti scalp roller as shown
below. 54" mower: Four places 60", 72" mower: Two places rear
6. Place 50 mm (2 in.) wood blocks under each side of the mower deck.
7. Depress the hydraulic lift control pedal (DOWN) and pull down the lift links.
8. Attach the lift links to the mower deck with attaching hardware.
9. Install universal joint. Pull back the coupler of the universal joint. Push the universal joint onto the PTO shaft until the coupler locks.
A Tug the universal joint backward and forward to make
sure it is locked securely.
(1) Anti scalp roller
(1) Lift link (2) Clevis pin, Plain washer, Snap ring
MOWER MOUNTING10
10.After mounting the mower, check the mower level. If necessary, adjust the mower level and anti-scalp rollers.
ADJUSTING THE MOWER
See "OPERATING THE MOWER" section.
DISMOUNTING THE MOWER DECK
For dismounting the mower deck, reverse the above procedures.
(1) Universal joint (2) Coupler
(A) "PULL"
11OPERATING THE ENGINE
OPERATING THE ENGINE
To avoid personal injury: A Read "SAFE OPERATION" in the front of this
manual.
A Read the danger, warning and caution labels
located on the machine.
A To avoid danger of exhaust fume poisoning, do
not operate the engine in a closed building without proper ventilation.
A Never start the engine while standing on the
ground. Start the engine only from operator's seat.
MOUNT AND DISMOUNT MACHINE SAFELY
DO NOT step on either side of the mower deck when mounting and dismounting the machine. When mounting the machine from either side, step over the mower deck.
STARTING THE ENGINE
To apply the parking brake:
Depress the parking brake pedal firmly with your right foot and the parking brake lock pedal simultaneously with your left foot. Then release the parking brake pedal while holding the parking brake lock pedal down.
To release the parking brake: Depress the brake pedal and release slowly with your right foot without pressing the parking brake lock pedal.
1. Sit on the operator's seat.
2. Apply the parking brake.
(1) Parking brake pedal (2) Parking brake lock pedal
(A) "DEPRESS"
OPERATING THE ENGINE12
A Do not depress the hydraulic lift control pedal.
When the engine is off, depressing the hydraulic lift control pedal (UP or DOWN) will lower the implement.
3. Make sure that the PTO lever is in the "DISENGAGED" (OFF) position.
(1) PTO lever "ENGAGED" (ON)
"DISENGAGED" (OFF)
4. Place the motion control levers in the "NEUTRAL LOCK" position.
(1) Motion control lever (LH) (2) Motion control lever (RH)
(A) "NEUTRAL LOCK" Position (B) "NEUTRAL" Position (C) "FORWARD" (D) "REVERSE"
5. Set the throttle lever 1/2 way forward.
(1) Throttle lever "FAST"
"SLOW"
6. Insert the key into the key switch and turn clockwise one notch. Make sure the Easy Checker (TM) lights are ON.
13OPERATING THE ENGINE
BKey Switch
A Because of the safety devices, the engine may not be
started except when the PTO clutch is "DISENGAGED" (OFF), the parking brake lock pedal is applied, motion control levers are in "NEUTRAL LOCK" position and the operator is sitting in the seat.
For the appropriate preheating time, refer to the table below:
A Glow plug indicator (1) comes on while the engine is
being preheated.
A Do not use starting fluid or ether. A To protect the battery and the starter, make sure that
the starter is not continuously turned for more than 10 seconds.
A Do not turn the key switch while the engine is running. A When the temperature is below 0 (32 ), run the
engine at medium speed to warm up the lubricant of the engine and transmission for at least 10 minutes. If the machine is operated before the lubricant is warm enough, the machine life will be shortened.
A Do not operate the machine under full load until it is
sufficiently warmed up.
A When the ambient temperature is less than -15
(5 ), remove the battery from the machine and store it somewhere warm until next operation.
OFF............ The position where the key can be
inserted into or removed from the key switch. [When the key is turned this position, the engine shuts off.]
ON.............. The engine keeps running.
PREHEAT... The super glow plug is heated.
START....... Apply the parking brake and turn the
key switch to this position to start the engine.
: "OFF" : "ON"
: "PREHEAT" : "START"
7. Turn the key switch clockwise, and hold it for about 5 seconds. (at the "PREHEAT" position)
Temperature Preheating Time
Over 0 (32 ) 5 sec.
Below 0 (32 ) 10 sec.
(1) Glow plug indicator
8. Turn the key switch to the "START" position and release the key to the "ON" position when the engine starts.
9. Make sure that the Easy Checker (TM)
lights have gone off. If the light is still on, immediately stop the engine and check the remedy following the instruction. (See "CHECK DURING OPERATING" in "OPERATING THE ENGINE" section.)
10. Warm the engine by running at
medium speed.
OPERATING THE ENGINE14
CHECK DURING OPERATING
While operating, make the following checks to see that all the parts are functioning normally.
BImmediately Stop the Engine if:
A The engine suddenly slows down or accelerates. A Unusual noises are suddenly heard. A Exhaust fumes suddenly become discolored.
BEasy Checker (TM)
If the warning lamps in the Easy Checker (TM) come on during operation, stop the engine immediately, and find the cause as shown below. Never operate the machine while Easy Checker (TM) lamp is "ON".
Engine oil pressure If the oil pressure in the engine goes below the prescribed level, the warning lamp in the Easy Checker (TM) will come on.
If this should happen during operation, stop the engine immediately and check level of engine oil.
Electrical charge If the alternator is not charging the battery, the warning
lamp in the Easy Checker (TM) will come on.
If this should happen during operation, check the electrical charging system or consult your local KUBOTA Dealer.
Fuel level [RH tank (primary tank) only] If the fuel in the RH tank (primary tank) goes below the prescribed level, the warning lamp in the Easy
Checker (TM) will come on. (less than 9.0 L (2.38 U.S. gals.) in the RH tank)
If this should happen during operation, switch to the LH tank (secondary tank).
BFuel Valve, Fuel Gauge and Warning Lamp
1. There are three switch positions in the fuel valve. (See "Fuel valve position" below.)
Fuel valve position
2. The fuel gauge shows the amount of fuel left in the LH tank (secondary tank).
3. Use the fuel in the RH tank (primary tank) first.
4. When the waring lamp in the Easy Checker (TM) comes on, switch to the LH tank (secondary tank).
(1) Easy checker (TM)
(1) Fuel valve (A) "OFF"
(B) RH (Primary tank) (C) LH (Secondary tank)
Rightward OFF
Downward RH (Primary tank)
Leftward LH (Secondary tank)
(1) Fuel gauge for LH tank (Secondary tank) (2) Fuel level warning lamp for RH tank (Primary tank)
(E) "EMPTY" (F) "FULL"
15OPERATING THE ENGINE
5. After switching to the LH tank, if the fuel gauge indicates "E", the fuel in the LH tank (secondary tank) is empty (less than 3.4 L (0.9 U.S gals.) in the LH tank). Refuel as soon as possible. (See "Checking Amount of Fuel and Refueling" in "DAILY CHECK" in "PERIODIC SERVICE" section.)
A Fill the fuel tank only to bottom of the filler neck. A Use the fuel from the RH tank (primary tank) first.
Before the RH tank (primary tank) becomes empty (less than 9.0 L (2.38 U.S. gals.) in the RH tank), switch to the LH tank (secondary tank).
A Be careful not to empty the fuel tank. Otherwise air
may enter the fuel system. Should this happen, the system should be bled. (See "Bleeding Fuel System" in "SERVICE AS REQUIRED" in "PERIODIC SERVICE" section.)
BCoolant Temperature Gauge
To avoid personal injury: A Do not remove radiator cap until coolant
temperature is well below its boiling point. Then loosen cap slightly to the stop to relieve any excess pressure before removing cap completely.
If the indicator reaches red zone, or horn sounds.
1. Place the PTO lever in the "DISENGAGE" (OFF) position.
2. Move the machine to the level surface, and apply the parking brake.
3. Place the throttle lever in the engine idle position, and let the engine run for a few minutes.
4. Check the Cooling System, after it has sufficient time to cool down.
Check the following items:
1. Shortage or leakage of the coolant.
2. Foreign matter on the radiator net or dust and dirt between the radiator fins.
3. Looseness of fan belt.
4. Blockage in the radiator tube.
(See "PERIODIC SERVICE" section.)
(1) Coolant temperature gauge
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