Kubota Z122E, Z121S, Z125E, Z125S Operators Manual

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AS . E . 2 - 2 . - . AK		5
	Code No. K3011-7123-2	S

PRINTED IN U.S.A.

© KUBOTA Corporation 2013

OPERATOR'S MANUAL

MODELS Z122E

Z121S

Z125E

Z125S

1BDABDYAP0010

READ AND SAVE THIS MANUAL

ABBREVIATION LIST

Abbreviations	Definitions
API	American Petroleum Institute
PTO	Power Take Off
RH/LH	Right-hand and left-hand sides are determined by facing in
	the direction of forward travel
ROPS	Roll-Over Protective Structures
rpm	Revolutions Per Minute
SAE	Society of Automotive Engineers

UNIVERSAL SYMBOLS

As a guide to the operation of your machine, various universal symbols have been utilized on the instruments and controls. The symbols are shown below with an indication of their meaning.

Safety Alert Symbol		Power Take-Off Switch Control-Off Position
Read Operator's Manual		(Disengaged)
		Power Take-Off Switch Control-On Position
Gasoline Fuel		(Engaged)
Fuel-Level		Hours
Parking Brake-Engaged position		Cutting Height
Parking Brake-Disengaged position		Fast
Engine-Stop		Slow
Engine-Run		Engine Speed Control
Starter Control		Choke

California Proposition 65

WARNING

Engine exhaust, some of its constituents, certain vehicle components and fluids, contain or emit chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

KUBOTA Corporation is ···

Since its inception in 1890, KUBOTA Corporation has grown to rank as one of the major firms in Japan.

To achieve this status, the company has through the years diversified the range of its products and services to a remarkable extent, until today, 19 plants and 16,000 employees produce over 1,000 different items, large and small.

All these products and all the services which accompany them, however, are unified by one central commitment. KUBOTA makes products which, taken on a national scale, are basic necessities. Products which are indispensable, products intended to help individuals and nations fulfill the potential inherent in their environment. For KUBOTA is the Basic Necessities Giant.

This potential includes water supply, food from the soil and from the sea, industrial development, architecture and construction, transportation.

Thousands of people depend on KUBOTA's know-how, technology, experience and customer service. You too can depend on KUBOTA.

This spark ignition system complies with Canadian ICES-002.

FOREWORD

You are now the proud owner of a KUBOTA ZERO TURN MOWER. This machine is a product of KUBOTA's quality engineering and manufacturing. It is made of excellent materials and under a rigid quality control system. It will give you long, satisfactory service. To obtain the best use of your machine, please read this manual carefully. It will help you become familiar with the operation of the machine and contains many helpful hints about machine maintenance. It is KUBOTA's policy to utilize, as quickly as possible, every advance in our research. The immediate use of new techniques in the manufacturing of products may cause some small parts of this manual to become outdated. KUBOTA distributors and dealers will have the most up-to-date information. Please do not hesitate to consult them.

3SAFETY FIRST

This symbol, the industry's ''Safety Alert Symbol'', is used throughout this manual and on labels on the machine itself to warn of the possibility of personal injury. Read these instructions carefully. It is essential that you read the instructions and safety regulations before you attempt to assemble or use this unit.

3DANGER : Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

3WARNING : Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

3CAUTION : Indicates a potentially hazardous situation which, if not avoided, could result in minor or moderate injury.

IMPORTANT : Indicates that equipment or property damage could result if instructions are not followed.

NOTE : Gives helpful information.

CONTENTS
SAFE OPERATION ............................................................................................	-1
SERVICING OF MACHINE .........................................................................................	1
SPECIFICATIONS.......................................................................................................	3
IMPLEMENT LIMITATIONS ........................................................................................	5
INSTRUMENT PANEL AND CONTROLS...................................................................	6
MOWER MOUNTING ..................................................................................................	8
MOUNTING THE MOWER DECK ...........................................................................	8
ADJUSTING THE MOWER .....................................................................................	8
DISMOUNTING THE MOWER DECK .....................................................................	8
OPERATING THE ENGINE.........................................................................................	9
MOUNT AND DISMOUNT MACHINE SAFELY.......................................................	9
STARTING THE ENGINE ........................................................................................	9
Throttle Lever..................................................................................................................	11
Key Switch......................................................................................................................	11
CHECK DURING OPERATING .............................................................................	12
Immediately Stop the Engine if:......................................................................................	12
Fuel Gauge.....................................................................................................................	12
Hour Meter......................................................................................................................	12
COLD WEATHER STARTING ...............................................................................	12
WARMING UP .......................................................................................................	13
Warm-up and Transmission Oil in the Low Temperature Range....................................	13
JUMP STARTING ..................................................................................................	13
STOPPING THE ENGINE......................................................................................	14
OPERATING THE MACHINE....................................................................................	15
OPERATING NEW MACHINE ...............................................................................	15
Changing Lubricating Oil for New Machines...................................................................	15
Engine Break-in ..............................................................................................................	15
Machine Break-in............................................................................................................	15
STARTING .............................................................................................................	16
Operator's Seat...............................................................................................................	16
Seat Belt .........................................................................................................................	16
Light Switch ....................................................................................................................	16
Mower Lift Pedal.............................................................................................................	17
Throttle Lever..................................................................................................................	17
Parking Brake Lever .......................................................................................................	17
Motion Control Lever ......................................................................................................	18
STOPPING.............................................................................................................	20
PARKING ...............................................................................................................	20
TRANSPORTING...................................................................................................	21
Hydrostatic Transaxle Bypass Rods...............................................................................	21

OPERATING THE MOWER ......................................................................................	22
MAKING THE MOST OF YOUR MOWER.............................................................	22

CONTENTS

ADJUSTING CUTTING HEIGHT ...........................................................................	22
OPERATING MOWER...........................................................................................	23
PTO Switch.....................................................................................................................	23
Starting ...........................................................................................................................	24
TIRES AND WHEELS ...............................................................................................	25
TIRES.....................................................................................................................	25
Inflation Pressure............................................................................................................	25
WHEELS ................................................................................................................	25
Remove and Install Front Caster Wheels.......................................................................	26
MAINTENANCE.........................................................................................................	27
SERVICE INTERVALS ..........................................................................................	27
LUBRICANTS AND FUEL......................................................................................	30
PERIODIC SERVICE.................................................................................................	31
HOW TO RAISE THE OPERATOR'S SEAT..........................................................	31
DAILY CHECK .......................................................................................................	32
Checking Engine Oil Level..............................................................................................	32
Checking Amount of Fuel and Refueling ........................................................................	33
Checking and Cleaning Air Intake Screen......................................................................	34
Checking Tire Pressure ..................................................................................................	34
Inflation Pressure............................................................................................................	34
Checking Transaxle Fluid Level......................................................................................	35
Checking Movable Parts.................................................................................................	35
EVERY 25 HOURS ................................................................................................	36
Cleaning Precleaner Element (Except Z125E) ...............................................................	36
Cleaning Air Cleaner Element (Z122E, Z125E)..............................................................	37
EVERY 50 HOURS ................................................................................................	39
Checking Engine Start System.......................................................................................	39
Checking OPC System...................................................................................................	40
Checking Carbon Canister Air Filter ...............................................................................	40
Changing Engine Oil (Z122E, Z125E) ............................................................................	41
Replacing Engine Oil Filter (Z122E, Z125E)...................................................................	42
Checking Muffler and Spark Arrester (if equipped).........................................................	43
EVERY 100 HOURS ..............................................................................................	43
Changing Engine Oil (Z121S, Z125S) ............................................................................	43
Replacing Precleaner Element (Except Z125E) .............................................................	44
Replacing Air Cleaner Element (Z122E, Z125E) ............................................................	44
Replacing Air Cleaner Element (Z121S, Z125S) ............................................................	44
Cleaning Engine Shroud.................................................................................................	45
Checking Spark Plug ......................................................................................................	46
Checking Fuel Lines .......................................................................................................	47
Battery Condition ............................................................................................................	48
Adjusting Throttle Cable .................................................................................................	50
Replacing Engine Oil Filter (Z121S, Z125S)...................................................................	51
EVERY 200 HOURS ..............................................................................................	52
Checking Hydraulic Hose ...............................................................................................	52
EVERY 400 HOURS ..............................................................................................	53
Replacing Transaxle Oil Filter Cartridge.........................................................................	53
Changing Transaxle Fluid...............................................................................................	54

EVERY 500 HOURS ..............................................................................................

54

	CONTENTS
Electric Clutch Adjustment..............................................................................................	54
Checking Engine Valve Clearance (Z121S, Z125S).......................................................	55
EVERY AFTER 500 HOURS .................................................................................	55
Cleaning Combustion Chamber......................................................................................	55
EVERY 1 YEAR .....................................................................................................	55
Replacing Precleaner Element (Except Z125E) .............................................................	55
Replacing Air Cleaner Element (Z122E, Z125E) ............................................................	55
Replacing Air Cleaner Element (Z121S, Z125S) ............................................................	55
Changing Engine Oil (Z122E, Z125E) ............................................................................	55
Replacing Engine Oil Filter (Z122E, Z125E)...................................................................	55
Replacing Fuel Filter (Z122E, Z125E) ............................................................................	55
Checking Muffler and Spark Arrester (if equipped).........................................................	55
Replacing Spark Plug .....................................................................................................	55
Checking Engine Valve Clearance (Z122E, Z125E).......................................................	55
EVERY 2 YEARS...................................................................................................	56
Replacing Hydraulic Hose ..............................................................................................	56
Replacing Fuel Lines ......................................................................................................	56
Replacing Engine Breather Hose ...................................................................................	56
Replacing Carbon Canister Air Filter ..............................................................................	56
SERVICE AS REQUIRED......................................................................................	56
Replacing Fuses.............................................................................................................	56
Checking and Replacing Blade.......................................................................................	57
Mower Belt Replacement................................................................................................	58
ADJUSTMENT...........................................................................................................	59
MOTION CONTROL LEVER .................................................................................	59
HST NEUTRAL...............................................................................................................	59
MAXIMUM SPEED (FORWARD) ...................................................................................	60
MOTION CONTROL LEVER ALIGNMENT ....................................................................	60
MOWER DECK LEVEL..........................................................................................	61
ANTI-SCALP ROLLERS.................................................................................................	61
LEVEL MOWER DECK (Side-to-Side) ...........................................................................	62
LEVEL MOWER DECK (Front-to-Rear) .........................................................................	63
GENERAL TORQUE SPECIFICATION .................................................................	64
TIGHTENING TORQUE CHART ...........................................................................	65
STORAGE .................................................................................................................	66
TROUBLESHOOTING...............................................................................................	67
ENGINE TROUBLESHOOTING ............................................................................	67
BATTERY TROUBLESHOOTING .........................................................................	69
MACHINE TROUBLESHOOTING .........................................................................	69
MOWER TROUBLESHOOTING............................................................................	70
INDEX........................................................................................................................	72

SAFE OPERATION -1

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.BEFORE OPERATING

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 lever. 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 and machine safety labels before attempting to start and operate the machine.

3.Pay special attention to the safety 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.

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.

If any structural member of the ROPS is damaged, replace the entire structure at your local KUBOTA Dealer.

(1)ROPS

(2)Seat belt

5.Always use the seat belt if the machine has the ROPS. Check the seat belt regularly and replace if frayed or damaged.

6.Do not allow any bystanders around or near machine during operation.

7.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.

8.Do not operate the machine or any attachments while under the influence of alcohol, medication, controlled substances or when fatigued.

9.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.

10.Do not wear radio or music headphones while operating the machine.

Safe operation requires your full attention.

11.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 or ROPS.

12.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.)

13.Keep all shields and guards in place. Replace any that are damaged or missing.

14.Before allowing other people to use your machine, explain how to operate and have them read this manual before operation.

-2 SAFE 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 and maintenance of the equipment.

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 approved 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.

2.OPERATING

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 tilting deck.

6.Check before each use that operator presence controls are functioning correctly. Test safety systems. (See "Checking Engine Start System" and "Checking OPC System" in "EVERY 50 HOURS" in "PERIODIC SERVICE" section.)

Do not operate unless they are functioning correctly.

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 a 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.Maintain all screens to avoid overheating conditions.

15.Always inspect the mower for damage after striking a foreign object. Repair or replace any damaged parts before restarting.

16.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 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. There is no safe place for them to ride. 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.

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 and make sure area to the rear is clear of children before doing so.

SAFE OPERATION -3

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 a 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.

3.TRANSPORTING

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.

4.SERVICING AND STORAGE

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, etc.

3.Always stop the engine before refueling. Avoid spills and overfilling. Wipe up spilled fuel immediately.

(1) Fuel tank cap

4.Use extra care in handling gasoline 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 SAFE OPERATION

(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 attempt to mount a tire on a rim unless qualified to do so and all proper safety precautions are followed.

11.Always maintain the correct tire inflation pressure. Do not inflate tires above the recommended pressure shown in the Operator's Manual.

12.Provide adequate support when changing wheels.

13.Make sure that wheel nuts and bolts have been tightened to the specified torque.

14.Do not make adjustments or repairs with the engine running.

15.Keep machine free of grass, leaves, or other debris build-up.

16.Do not change the engine governor setting or overspeed the engine.

17.Do not run a machine inside a closed area.

18.Mower blades are sharp and can cut your hands. Wrap the blade(s) or wear gloves, and use extra caution when servicing them.

19.Keep nuts and bolts, especially blade attachment bolts, tight and keep equipment in good condition.

20.Never tamper with safety devices. Check their operation for proper function regularly.

21.Waste products such as used oil, fuel, coolant, brake fluid, and batteries, can harm the environment, people, pets and wildlife. Please dispose of properly.

22.Do not use beverage containers for waste fluids or other products. Someone, particularly children, may drink them by mistake.

23.Securely support machine or any machine elements with stands or suitable blocking before working underneath. For your safety do not rely on hydraulically supported devices, they may leak down, suddenly drop or be accidently lowered.

24.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.

(1) Battery	(+): Positive terminal
(2) Ground cable	(-): Negative terminal

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.

SAFE OPERATION -5

5. DANGER, WARNING AND CAUTION LABELS

-6 SAFE OPERATION

SAFE OPERATION -7

-8 SAFE OPERATION

6.CARE OF DANGER, WARNING, AND CAUTION LABELS

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.

SERVICING OF MACHINE 1

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 serial number of the machine, ROPS, engine and mower.

Locate the serial numbers now and record them in the space provided.

Type	Serial No.

Machine

ROPS

Engine

Mower

Date of Purchase

Name of Dealer

(To be filled in by purchaser)

C Warranty

This machine is warranted under the Kubota Limited Express warranty, a copy of which may be obtained from your selling dealer. No warranty shall, however, apply if the machine has not been handled according to the instruction given in the Operator's Manual even it is within the warranty period.

C Scrapping the machine and its procedure

To put the machine out of service, correctly follow the local rules and regulations of the country or territory where you scrap it. If you have questions, consult your local KUBOTA Dealer.

(1)Machine identification plate

(2)Machine serial No.

[Z122E]

(1) Engine serial No.

[Z125E]

(1) Engine serial No.

2 SERVICING OF MACHINE

[Z121S, Z125S]

(1) Engine serial No.

(1)Mower identification plate

(2)Mower serial No.

(1) ROPS serial No.

SPECIFICATIONS 3

SPECIFICATIONS

	Model			Z122E		Z121S	Z125E	Z125S
	Model			GH731V-1		GH736V	GH733V-1	GH750V
	Max. engine power		kW (HP)	16.4 (22) *1*2		15.7 (21) *1*3	18.6 (25) *1*2	18.6 (25) *1*3
	(Gross)
	Type					Air-cooled gasoline engine
	Number of cylinders					2 (V-Twin)
	Bore and stroke		mm (in.)	79 x 73		83 x 67	79 x 73	83 x 69
				(3.11 x 2.87)		(3.27 x 2.64)	(3.11 x 2.87)	(3.27 x 2.72)
Engine
	Total displacement		cm (cu. in.)	724 (44)		725 (44)	724 (44)	747 (46)
	Rated revolution		rpm		3600
	Fuel					Unleaded gasoline
	Starter					Electric
	Lubrication					Full pressure lubrication
	Cooling					Air cooled
	Battery				U1 (12 V, RC: 45 min, CCA: 300, CA: 410)
	Fuel tank		L (U.S.gals.)		16 (4.2)
	Engine crankcase		L (U.S.qts.)		1.8 (1.9)
Capacities	(with filter)
	Transmission case
	including Rear axle gear		L (U.S.qts.)		4.8 (5.1) (*4)
	case
	Overall length		mm (in.)		1940 (76.4)
	Overall width		mm (in.)		1207 (47.5)
	w/o mower deck
	Overall	With ROPS	mm (in.)		1652 (65.0)
	height
Dimensions
	Wheelbase		mm (in.)		1155 (45.5)
	Min. ground clearance		mm (in.)	123 (4.84)			123 (4.84)
				W/48"			W/54"
	Tread	Front	mm (in.)		796 (31.3)
		Rear	mm (in.)		954 (37.6)
Weight (W/MOWER DECK)			kg (lbs.)	330 (728) with 48"		340 (750) with 48"	340 (750) with 54"	350 (772) with 54"
	Tires	Front				11 x 4 - 5 (4PR) Smooth
		Rear				22 x 10 - 14 (4PR) Turf
	Traveling	Forward	mph (km/h)			0 to 8.0 (0 to 12.9)
	speeds
Traveling		Reverse	mph (km/h)			0 to 4.0 (0 to 6.4)
system
	Steering					2 - Hand levers
	Transmission					2 - HST w / Gear
	Parking brake					Hand lever applied, released
	Min. turning radius		mm (in.)		0 (0)

4	SPECIFICATIONS
		Model	Z122E	Z121S		Z125E	Z125S
PTO		Drive system			Belt
		Clutch type			Electric

(Specifications and design subject to change without notice)

NOTE:

*1: Manufacturer's estimate

*2: The gross power rating for individual gas engine models is labeled in accordance with SAE (Society of

Automotive Engineers) code J1940 (Small Engine Power & Torque Rating Procedure), and rating performance has been obtained and corrected in accordance with SAE J1995 (Revision 2002-05). Torque values are derived at 3060 RPM; horsepower values are derived at 3600 RPM. Actual gross engine power will be lower and is affected by, among other things, ambient operating conditions and engine-to-engine variability. Given both the wide array of products on which engines are placed and the variety of environmental issues applicable to operating the equipment, the gas engine will not develop the rated gross power when used in a given piece of power equipment (actual "onsite" or net power). This difference is due to a variety of factors including, but not limited to, accessories (air cleaner, exhaust, charging, cooling, carburetor, fuel pump, etc.), application limitations, ambient operating conditions (temperature, humidity, altitude), and engine-to-engine variability. Due to manufacturing and capacity limitations, Briggs & Stratton may substitute an engine of higher rated power for this Series engine.

*3: Horsepower ratings exceed Society of Automotive Engineers Small Engine Test Code J1940. Actual engine horsepower is lower and affected by, but not limited to, accessories (air cleaner, exhaust, charging, cooling, fuel pump, etc.), application, engine speed and ambient operating conditions (temperature, humidity, and altitude). Kohler reserves the right to change product specifications, design, and standard equipment without notice and without incurring obligation.

*4: Oil amount when the oil level is at the upper level.

	Model				RCK48P-124Z		RCK54P-127ZA
	Suitable machine				Z122E, Z121S		Z125E, Z125S
	Mounting method					Parallel linkage
	Adjustment of cutting height					Dial gauge
	Cutting width			mm (in.)	1225 (48)		1375 (54)
	Cutting height			mm (in.)		38 to 114 (1.5 to 4.5)
PRO
	Weight (Approx.)			kg (lbs.)	60 (132)		68 (150)
Commercial
Deck	Blade spindle speed			r/s (rpm)	69.1 (4140) *1		61.7 (3700) *1
(Fabricated
	Blade tip velocity			m/s (fpm)	92.0 (18100) *1		92.0 (18100) *1
deck)
	Blade length			mm (in.)	424 (16.7)		475 (18.7)
	Number of blades					3
		Total length		mm (in.)	880 (34.6)		925 (36.4)
	Dimensions	Total width		mm (in.)	1552 (61.1)		1710 (67.3)
		Total height		mm (in.)		340 (13.3)

*1: Engine Max rpm

IMPLEMENT LIMITATIONS

5

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		Maximum total	Tongue weight	Towing capacity
		Front axle	Rear axle	weight	W	W
		Wf	Wr
	Z122E, Z121S,	98 kg (217 lbs.)	380 kg (837 lbs.)	478 kg (1054 lbs.)	34 kg (75 lbs.)	113 kg (250 lbs.)
	Z125E, Z125S

A Do not operate with trailer on incline greater than 10.

6 INSTRUMENT PANEL AND CONTROLS

INSTRUMENT PANEL AND CONTROLS

		ILLUSTRATED CONTENTS		ILLUSTRATED CONTENTS
(1)	Parking brake lever..............................	9, 17	(8)	Cutting height control dial.....................	22
(2)	Motion control lever..............................	9, 18	(9)	Key switch............................................	11
(3)	Seat belt...............................................	16	(10)	Hour meter...........................................	12
(4)	Cup holder............................................	-	(11)	PTO switch...........................................	23
(5)	Operator's seat.....................................	16	(12)	Throttle lever........................................	17
(6)	ROPS...................................................	-	(13)	Light switch (Z121S, Z125S)................	16
(7)	Mower lift pedal....................................	17

INSTRUMENT PANEL AND CONTROLS 7

ILLUSTRATED CONTENTS

(1) Anti-scalp roller (Front, bolt shift type).......

22

8 MOWER MOUNTING

MOWER MOUNTING

MOUNTING THE MOWER DECK

To avoid serious 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 1.5 in. position.

3.Change the direction of the front tires as shown in the figure.

4.Place the mower deck at the right side of the machine.

5.Slide the mower deck under the machine, then lower mower lift links.

6.Attach the lift links to the mower deck with attaching hardware.

7.Attach the PTO belt to the engine pulley. Refer the belt routing.

(1)PTO belt

(2)Engine pulley

8.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)Lift link

(2)Clevis pin, snap pin

OPERATING THE ENGINE

9

OPERATING THE ENGINE

To avoid serious injury:

A Read and understand "SAFE OPERATION" in the front of this manual.

A Read and understand the danger, warning and caution labels located on the machine.

ATo 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

1.Sit on the operator's seat.

2.Apply the parking brake.

To apply the parking brake:

Place the parking brake lever in the "ENGAGED" position.

(1) Parking brake lever	"ENGAGED"
	"DISENGAGED"

To release the parking brake:

Place the parking brake lever in the "DISENGAGED" position.

10 OPERATING THE ENGINE

3.Make sure that the PTO switch is in the "DISENGAGED" (OFF) position.

5. Set the throttle lever as follows.

AIf the engine is cold:

Place the throttle lever to the "CHOKE" position.

AIf the engine is warm:

Place the throttle lever midway between the "SLOW" and the "FAST" positions.

(1) PTO switch	"ENGAGED" (ON)
	"DISENGAGED" (OFF)

4.Place the motion control levers in the "NEUTRAL LOCK" position.

(1) Throttle lever	"FAST"
	"SLOW"
	"CHOKE"

(1)	Motion control lever (LH)	(A) "NEUTRAL LOCK"
(2)	Motion control lever (RH)	Position

(B) "NEUTRAL" Position (held by hands)

(C) "FORWARD"

(D) "REVERSE"

OPERATING THE ENGINE 11

6.Insert the key into the key switch. Turn the key switch to the "START" position and release the key to the "ON" position when the engine starts.

ABecause of the start interlocks, the engine can not be started except when the PTO switch is disengaged (OFF), the parking brake lever is applied, motion control levers are in "NEUTRAL LOCK" position and the operator is sitting on the seat.

BThrottle Lever

Pulling the throttle lever backward decreases the engine speed and pushing it forward increases the engine speed. When the lever is pushed beyond the "FAST" position, the choke is engaged.

[For a Cold Engine]

Always place the throttle lever to the "CHOKE" position to start the engine in cold conditions.

Gradually return the throttle lever to the usual position after the engine starts and warms up.

The engine/equipment may be operated during the warmup period, but it may be necessary to leave the choke partially on until the engine warms up.

[For a Warm Engine]

Always place the throttle lever to the usual position after the engine starts.

BKey Switch

OFF............	The position where the key can be
	inserted into or removed from the
	key switch. [When the key is turned
	to this position, the engine shuts off.]
ON..............	The engine keeps running.

: "OFF"	: "START"
: "ON"

A Do not use starting fluid or ether.

ATo protect the battery and the starter, make sure that the starter is not continuously turned for more than 10 seconds at a time.

If the engine does not start, allow 60 seconds cool down period between starting attempts.

AIf the starter does not turn the engine over, shut off the starter immediately. Do not make further attempts to start the engine until the condition is corrected. Do not jump start using another battery.

Consult your local KUBOTA dealer.

A Do not turn the key switch to the "START" position while the engine is running.

AWhen the temperature is below 0 (32 ), run the engine at medium speed to warm up the lubricant of the engine and the 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 2 or 3 minutes for temperature above 0 (32 ).

A When the ambient temperature is less than -15 (5 ), remove the battery from the machine and store it somewhere warm until the next operation.

7. Warm the engine by running at medium speed.

START........ Apply the parking brake and turn the key switch to this position to start the engine.

12 OPERATING THE ENGINE

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 suddenly occur.

A Exhaust fumes suddenly become discolored.

BFuel Gauge

The fuel gauge indicates the fuel level.

(1) Fuel gauge	(E) "EMPTY"
	(F) "FULL"

A Do not refuel over "F". Fill the tank only to the bottom of the filler neck in the fuel tank.

A Fill the fuel on a level ground.

BHour Meter

This meter gives readings for the number of hours the engine has been running.

(1) Hour meter

COLD WEATHER STARTING

If the ambient temperature is below 0 (32 ) and the engine is very cold, start it in the following manner:

1.Place the throttle lever to the "CHOKE" position.

2.Turn the key switch to the START (" ") position. A Operate the starter 5 seconds.

A If the engine does not start, wait 10 seconds. A Repeat this procedure until the engine starts.

3.When the engine starts, release the key to the "ON" (" ") position.

4.Place the throttle lever midway between the "SLOW" and the "FAST" positions.