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LUBRICANTS AND FUEL

Locations

Capacities

Lubricants

Z231BR-

AU

Z231KH-

AU

Z251BR-

AU

Z251KH-

AU

Fuel

16.3 L (4.3 U.S. gals.)

•

Automobile unleaded or regular gasoline

•

Unleaded gasoline 87 octane or higher

Engine crankcase

1.8 L (1.9 U.S.qts.)

•

Engine oil: API service
Classification ,

SG

,

SH

,

SJ

or higher

Above 10

℃

(50

℉

)...SAE30

Between -18

℃

(0

℉

) to 38

℃

(100

℉

)...SAE10W-30

Below 0

℃

(32

℉

)...SAE5W-30

Transmission case
with filter, hose and
tank (RH and LH)

4.8 L (5.1 U.S.qts.)

•

Engine oil: API service
Classification SL
SAE20W-50

*1

Oil amount when the oil level is at the upper level of the oil level gauge.

Fuel:

• Clean, fresh, unleaded gasoline.
• A minimum of 87 octane/87AKI (90 RON).
• Gasoline with up to 10% ethanol (gasohol) or up to 15% methyl tertiary butyl ether (MTBE) is acceptable.
• Do not use unapproved gasoline, such as E85. Do not mix oil in gasoline or modify the engine to run on alternate

fuels. This will damage the engine components and void the engine warranty.

• This engine is certified to operate on gasoline. The emissions control system for this engine is engine

modifications (EM).

• High altitude:

At altitudes over 5000 feet (1524 meters), a minimum 85 octane / 85 AKI (89 RON) gasoline is acceptable. To
remain emissions compliant, high altitude adjustment is required. Operation without this adjustment will cause
decreased performance, increased fuel consumption, and increased emissions.
Operation of the engine at altitudes below 2500 feet (762 meters) with the high altitude kit is not recommended.

• The indicated capacity of fuel is the manufacturer's estimate.

Engine oil:

• Oil used in the engine should have an American Petroleum Institute (API) service classification and proper SAE

Engine oil according to the ambient temperatures as shown in the previous table.

• Synthetic oil meeting the listed classifications may be used after 50 hours of run time.

LUBRICANTS AND FUEL

MAINTENANCE

Z231BR-AU,Z231KH-AU,Z251BR-AU,Z251KH-AU

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Содержание Z231BR-AU

Страница 1: ...KUBOTA Corporation 2019 English Australia Code No K3014 7127 1 Z 2 3 1 B R A U Z 2 3 1 K H A U Z 2 5 1 B R A U Z 2 5 1 K H A U OPERATOR S MANUAL READ AND SAVE THIS MANUAL 1WNAM00001A01 MODELS Z231BR AU Z231KH AU Z251BR AU Z251KH AU ...

Страница 2: ...ment architecture construction and transportation Thousands of people depend on KUBOTA s know how technology experience and customer service You too can depend on KUBOTA Abbreviations Definitions API PTO RH LH ROPS rpm SAE American Petroleum Institute Power Take Off Right hand and left hand sides are determined by facing in the direction of forward travel Roll Over Protective Structures Revolution...

Страница 3: ...l 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 prod...

Страница 4: ...1 Fuel gauge 25 2 Hour meter 26 COLD WEATHER STARTING 26 WARMING UP THE ENGINE 26 1 Warm up and transmission oil in the low temperature range 26 JUMP STARTING 26 OPERATING THE MACHINE 28 OPERATING A NEW MACHINE 28 1 Changing lubricating oil for new machine 28 2 Engine break in 28 STARTING THE MACHINE 29 1 Operator s seat 29 2 Seat belt 29 3 Light switch 30 4 Mower lift pedal 30 5 Throttle lever 30...

Страница 5: ...e oil Z231BR AU Z251BR AU 51 4 Replacing engine oil filter Z231BR AU Z251BR AU 52 5 Checking the muffler and spark arrester if equipped 53 EVERY 100 HOURS 53 1 Changing the engine oil Z231KH AU Z251KH AU 53 2 Replacing precleaner element except Z251BR AU 54 3 Replacing air cleaner element Z231BR AU Z251BR AU 54 4 Replacing air cleaner element Z231KH AU Z251KH AU 54 5 Cleaning engine shroud 55 6 Ch...

Страница 6: ...g fuses 64 2 Checking and replacing blades 64 3 Replacing the mower belt 65 ADJUSTMENT 67 MOTION CONTROL LEVER 67 1 HST neutral 67 2 Maximum speed forward 68 3 Motion control lever alignment 68 3 1 Checking the alignment 68 3 2 Aligning the motion control levers 68 MOWER DECK LEVEL 68 1 Anti scalp rollers 68 2 Leveling the mower deck side to side 69 3 Leveling the mower deck front to rear 70 GENER...

Страница 7: ...4 Z231BR AU Z231KH AU Z251BR AU Z251KH AU ...

Страница 8: ...the risk of an accident Wear and use any additional safety items such as a hard hat safety boots or shoes eye and hearing protection gloves and so on as appropriate or required Do not wear radio or music headphones while operating the machine Do not operate the machine or any attachments while using or texting with a cellphone or any other electronic device Safe operation requires your full attent...

Страница 9: ...rain or before stopping Do not operate near ditches holes embankments or other terrain which may collapse under the machine s weight The risk of machine tip overs increases when the ground is loose or wet Park the machine on a firm and level surface Before you get off apply the parking brake place the motion control levers in their neutral lock positions disengage the PTO lower all attachments to ...

Страница 10: ...e terrain and other hidden hazards Keep away from drop offs Uneven terrain could overturn the machine Tall grass can hide obstacles Follow the manufacturer s recommendations for wheel weight or counterweights to improve stability Keep all movement on slopes slow and gradual Do not make sudden changes in speed or direction Avoid starting or stopping on a slope If tires lose traction disengage PTO a...

Страница 11: ...required so that the fluid level is between the UPPER and LOWER levels Keep a first aid kit and fire extinguisher handy at all times Do not attempt to mount a tire on a rim unless qualified to do so and all proper safety precautions are followed Always maintain the correct tire inflation pressure Do not inflate tires above the recommended pressure shown in the operator s manual Provide adequate su...

Страница 12: ...ers from playing or tampering with them To avoid sparks from an accidental short circuit always disconnect the battery s ground cable first and reconnect it last 1 Battery 2 Ground cable Positive terminal Negative terminal To avoid the danger of exhaust fume poisoning do not operate the engine indoors without adequate ventilation To reduce fire hazards clean the machine thoroughly before storage D...

Страница 13: ...SAFETY LABELS SAFE OPERATION 10 Z231BR AU Z231KH AU Z251BR AU Z251KH AU ...

Страница 14: ...SAFE OPERATION Z231BR AU Z231KH AU Z251BR AU Z251KH AU 11 ...

Страница 15: ...SAFE OPERATION 12 Z231BR AU Z231KH AU Z251BR AU Z251KH AU ...

Страница 16: ...SAFE OPERATION Z231BR AU Z231KH AU Z251BR AU Z251KH AU 13 ...

Страница 17: ...fety labels with new labels from your local KUBOTA Dealer If a component with safety label s attached is replaced with a new part make sure new label s is are attached in the same location s as the replaced component Attach new safety labels by applying on a clean dry surface and pressing any bubbles to the outside edge SAFE OPERATION 14 Z231BR AU Z231KH AU Z251BR AU Z251KH AU ...

Страница 18: ...prepared to give your dealer the product identification number PIN serial number and the ROPS engine and mower serial numbers Locate the PIN and serial numbers now and record them in the space provided Date of purchase Name of dealer To be filled in by purchaser Type PIN Serial number Machine ROPS Engine Mower To be filled in by purchaser 1 Machine identification plate 2 Product identification num...

Страница 19: ...ver apply if the machine has not been handled according to the instructions given in the operator s manual even if it is within the warranty period 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 SERVICING OF MACHINE WARRAN...

Страница 20: ...ts 1 8 1 9 Transmission case in cluding rear axle gear case L U S qts 4 8 5 1 4 Dimen sions Overall length mm in 1940 76 4 Overall width without mower deck mm in 1207 47 5 Overall height with ROPS mm in 1652 65 0 Wheelbase mm in 1155 45 5 Min ground clearance mm in 123 4 84 with 48 123 4 84 with 54 Tread Front mm in 796 31 3 Rear mm in 954 37 6 Weight without fuel with mower deck kg lbs 330 728 wi...

Страница 21: ...bility Due to manufacturing and ca pacity limitations Briggs and 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 and so on application engine speed and ...

Страница 22: ...ons listed below or Implements which are otherwise unfit for use with the KUBOTA Machine Any malfunctions or failures of the machine resulting from use with improper implements are not covered by the warranty Weight limit table Unit Maximum loading weight Maximum total weight Tongue weight W1 Towing capacity W2 Front axle Wf Rear axle Wr Z231BR AU Z231KH AU Z251BR AU Z251KH AU 98 kg 217 lbs 380 kg...

Страница 23: ...r 23 Motion control lever 31 3 Seat belt 29 4 Cup holder 5 Operator s seat 29 6 ROPS 7 Mower lift pedal 30 8 Cutting height control dial 35 9 Key switch 24 10 Hour meter 26 11 PTO switch 37 12 Throttle lever 30 13 Light switch Z231KH AU Z251KH AU 30 INSTRUMENT PANEL AND CONTROLS INSTRUMENT PANEL SWITCHES AND HAND CONTROLS 20 Z231BR AU Z231KH AU Z251BR AU Z251KH AU ...

Страница 24: ... RCK48P RCK54P Illustrated contents 1 Anti scalp roller front bolt shift type 35 2 Discharge deflector 28 Discharge deflector 36 MOWER INSTRUMENT PANEL AND CONTROLS Z231BR AU Z231KH AU Z251BR AU Z251KH AU 21 ...

Страница 25: ... the machine then lower mower lift links 6 Attach the lift links to the mower deck with attaching hardware 1 Lift link 2 Clevis pin snap pin 7 Attach the mower belt to the engine pulley Refer the belt routing 1 Mower belt 2 Engine pulley 3 Mower spring 4 Boss 8 Attach the mower spring to the boss on the mower deck 9 After mounting the mower check the mower level If necessary adjust the mower level...

Страница 26: ...N AND OFF THE MACHINE SAFELY Do not step on either side of the mower deck when you get on and off the machine When you get on and off 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 A ENGAGED B DISENGAGED To release ...

Страница 27: ...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 thro...

Страница 28: ... 5 Turn the fuel valve to the STOP OFF position 1 Fuel valve A STOP OFF B RUN IMPORTANT Do not stop the engine when the machine is on an incline for a long time The engine oil may go into the carburetor and the muffler through the valve system Before stopping the engine place the throttle control lever in the half speed position to help prevent the engine from backfiring CHECK DURING OPERATING IMP...

Страница 29: ... engine at about 50 of rated rpm according to the following table Ambient temperature Warm up time requirement Higher than 0 32 Approximately 5 minutes 10 to 0 14 to 32 5 to 10 minutes 20 to 10 4 to 14 10 to 15 minutes Below 20 4 More than 15 minutes IMPORTANT Do not operate unless the engine is well warmed up If operation is attempted while the engine is still cold the hydraulic mechanism will no...

Страница 30: ...5 Connect cables in numerical order Disconnect in reverse order after use 1 Dead battery 2 Jumper cables 3 Engine block or frame 4 Helper battery IMPORTANT This machine has a 12 volt negative ground starting system Use only same voltage for jump starting Use of a higher voltage source on the machine could result in severe damage to the machine electrical system Use only a matching voltage source w...

Страница 31: ...njury or death The machine relies upon the engine driven transmission for speed direction and motion control If the engine is not running the machine cannot be driven or controlled If the engine stops when operating on a slope apply the parking brake immediately to prevent a machine runaway Do not allow anyone other than the driver to ride on the machine Do not drive the machine close to the edges...

Страница 32: ...rator s seat WARNING To avoid serious injury or death Make adjustments to the seat only while the machine is stopped Make sure that the seat is completely secured after each adjustment Do not allow anyone other than the driver to ride on the machine 1 Armrest 2 Fore aft adjusting handle 3 Suspension adjust knob if equipped Fore aft adjustment Pull the seat adjusting lever and slide the seat Suspen...

Страница 33: ... the way then release the pedal to the desired mower deck cutting height 1 Mower lift pedal A RAISE and LOCK position B LOWER position 5 Throttle lever Move the throttle lever backward to decrease the engine speed Move it forward to increase the engine speed 1 Throttle lever A INCREASE B DECREASE C CHOKE 6 Parking brake lever To release the parking brake Place the parking brake lever in the DISENG...

Страница 34: ...d when these levers are in the NEUTRAL LOCK position the engine can only be started with levers in this position 1 Motion control levers A NEUTRAL LOCK position B NEUTRAL position held by hand 7 2 Operating position of the motion control lever Machine speed and steering is controlled by the motion control levers when the engine is running and the parking brake is released WARNING To avoid serious ...

Страница 35: ...r further forward than the right motion control lever Sharp zero left turn Push the right motion control lever forward and pull the left motion control lever rearward at the same time Sharp zero right turn Push the left motion control lever forward and pull the right motion control lever rearward at the same time Adjustment WARNING To avoid serious injury or death The motion control lever adjustme...

Страница 36: ...e engine and remove the key IMPORTANT Do not stop the engine when the machine is on an incline for a long time The engine oil may go into the carburetor and the muffler through the valve system Before stopping the engine place the throttle control lever in the half speed position to help prevent the engine from backfiring PARKING THE MACHINE WARNING To avoid serious injury or death Before leaving ...

Страница 37: ...e BYPASS POSITION hole 1 Left side HST bypass rod A Operating position B Bypass position 2 Pull the right side HST bypass rod out of the OPERATING POSITION hole and pull to the BYPASS POSITION Continue to hold the right side HST bypass rod in the BYPASS POSITION in order to move the machine 1 Right side HST bypass rod A Operating position B Bypass position H HOLD 3 After moving place both the righ...

Страница 38: ... first trip around the obstacle 4 Most lawns should be mowed to keep the grass approximately 50 to 80 mm 2 to 3 in high Best results are obtained by cutting often and not too short To keep a green lawn never mow more than 1 3 of the height of the grass or a maximum of 25 mm 1 in in 1 mowing For extremely tall grass set the cutting height at maximum cutting height for the first mowing then reset to...

Страница 39: ...ition IMPORTANT Never allow the rollers to contact the ground continuously as premature roller wear may develop if set incorrectly Anti scalp rollers must maintain a minimum clearance of 6 mm 0 25 in to the ground Bolt setting RCK48P RCK54P 1 Anti scalp roller front bolt shift type NOTE Operation of the mower deck in TRANSPORT position is allowed in order to achieve a cutting height of 4 5 in OPER...

Страница 40: ...ely after it is turned off Never operate the engine without heat shields or guards 1 Sit on the operator s seat Put on the seat belt Make sure that the parking brake is engaged 2 Start the engine 3 Engage the PTO switch 4 Disengage the parking brake 5 Speed up the engine by moving the throttle lever forward 6 Push or pull the motion control levers to move forward or rearward IMPORTANT Never attemp...

Страница 41: ...n the course of time Therefore check it everyday and inflate as necessary Tire sizes Recommended inflation pressure Front 11 4 5 4PR smooth 170 kPa 1 7 kgf cm2 25 psi Rear 22 10 14 4PR turf 110 kPa 1 1 kgf cm2 16 psi 1 Ground A INSUFFICIENT B NORMAL C EXCESSIVE WHEELS IMPORTANT When refitting a wheel tighten the wheel bolt to the following torques then recheck after traveling 200 m 200 yards chang...

Страница 42: ...wheels 1 Install the replacement wheel 2 Install the wheel bolt and the nut 1 Nut 2 Wheel bolt 3 Yoke 3 Tighten the nut Tightening torque 48 to 56 N m 36 to 41 lbf ft 4 9 to 5 7 kgf m 4 Lower the machine WHEELS TIRES AND WHEELS Z231BR AU Z231KH AU Z251BR AU Z251KH AU 39 ...

Страница 43: ...e every 50hr or every 1 year 52 63 1 4 Engine start system Check every 50hr 50 5 OPC system Check every 50hr 51 6 Muffler and spark arrester if equipped Check every 50hr or every 1 year 53 63 7 Engine shroud Clean every 100hr or every 1 year 55 8 Fuel filter Check every 100hr 56 Replace every 100hr or every 1 year 63 4 9 Battery condition Check every 100hr 58 10 Throttle cable Adjust every 100hr 5...

Страница 44: ...ours or every 1 year A genuine KUBOTA oil filter is a high efficiency oil filter 2 The initial 5 hours should not be a replacement cycle 3 This maintenance should be done daily or more often in dusty condition than in normal conditions Suggested cleaning interval is every 25 hours or every 1 year in normal conditions 4 Consult your local KUBOTA Dealer for this service 5 The initial 100 hours shoul...

Страница 45: ...ion chamber Clean after 500hr 62 4 17 Fuel line Check every 1 year 63 5 Replace every 4 years 64 3 18 Hydraulic hose Check every 1 year 63 5 Replace every 4 years 64 3 19 Fuse Replace Service as required 64 20 Blade Replace 64 21 Mower belt Replace 65 1 This maintenance should be done daily or more often in dusty condition than in normal conditions 2 The initial 100 hours should not be a replaceme...

Страница 46: ...lternate fuels This will damage the engine components and void the engine warranty This engine is certified to operate on gasoline The emissions control system for this engine is engine modifications EM High altitude At altitudes over 5000 feet 1524 meters a minimum 85 octane 85 AKI 89 RON gasoline is acceptable To remain emissions compliant high altitude adjustment is required Operation without t...

Страница 47: ... death Do not drop the seat when lowering it Watch your hands Do not place your hands under the seat when lowering it 1 Lower the seat slowly to lock DAILY CHECK To prevent trouble from occurring it is important to know the condition of the machine Check it before starting WARNING To avoid serious injury or death Be sure to check and service the machine on a level surface with the engine shut off ...

Страница 48: ...hese do not operate properly contact your local KUBOTA Dealer immediately 50 51 Others 1 Check the areas where pre vious trouble was experi enced 1 Checking the engine oil level WARNING To avoid serious injury or death Always stop the engine and remove the key before checking the oil 1 Check the engine oil before starting and 5 minutes or more after the engine has stopped 2 Wipe the dipstick area ...

Страница 49: ...or water to get into the fuel system Be careful not to spill fuel while refueling If a spill should occur wipe it off at once or it may cause a fire Do not use old fuel Use only unleaded gasoline with an octane rating index of 87 or higher NOTE Use fuel within approximately 30 days after purchase to avoid deterioration in fuel quality or add fuel stabilizer to keep fuel fresh and stabilized Fuel b...

Страница 50: ...it with a brush or cloth 3 Remove the dust and all foreign material from the engine plate 1 Air intake screen 2 Engine plate 4 Checking the tire pressure WARNING To avoid serious injury or death Do not attempt to mount a tire on a rim This should be done by a qualified person with the proper equipment Always maintain the correct tire pressure The inflation pressure in the front tires rises quickly...

Страница 51: ... air into the engine causing premature wear and failure Clean precleaner Z231BR AU Wash the precleaner every 25 hours of operation more often under extremely dusty or dirty conditions 1 Loosen the air cleaner cover knobs and remove the air cleaner cover 1 Air cleaner cover 2 Air cleaner cover knob 2 Remove the air cleaner element with the precleaner and remove the precleaner from it Make sure the ...

Страница 52: ...er cover 1 Air cleaner cover 2 Air cleaner cover knob 2 Remove air cleaner element with precleaner 1 Air cleaner element 2 Precleaner A Air intake B Base 3 Remove the precleaner from the paper element 4 Gently tap the paper element to dislodge dirt Do not wash the paper element or use pressurized air as this will damage the element Replace a dirty bent or damaged element with a genuine part Handle...

Страница 53: ...ck the engine start system periodically daily is best to test the function of the engine start system before operation WARNING To avoid serious injury or death Do not allow anyone near the machine while testing If the machine does not pass one of the following tests do not operate the machine Consult your local KUBOTA Dealer Sit on the operator s seat for all tests except for test 1 IMPORTANT Test...

Страница 54: ... OPC system The operator presence control OPC system in your machine is designed to protect you while operating Check the OPC system periodically daily is best to test function of the OPC system before operation WARNING To avoid serious injury or death Do not allow anyone near the machine while testing If the machine does not pass one of the following tests do not operate the machine Consult your ...

Страница 55: ...d serious injury or death Engine oil is a toxic substance Dispose of used oil properly Contact your local authorities for approved disposal methods or possible recycling WARNING To avoid serious injury or death Be sure to stop the engine and remove the key before changing the oil and the oil filter Allow engine to cool down sufficiently oil can be hot and may cause burns The oil filter must be cha...

Страница 56: ... hot Severe thermal burns can occur on contact Combustible debris such as leaves grass brush and so on can catch fire To avoid serious injury or death Allow the muffler engine cylinder and fins to cool before touching Remove accumulated debris from the muffler area and cylinder area It is a violation of California Public Resource Code Section 4442 to use or operate the engine on any forest covered...

Страница 57: ...eaner element Z231BR AU Z251BR AU See Cleaning air cleaner element Z231BR AU Z251BR AU on page 49 4 Replacing air cleaner element Z231KH AU Z251KH AU Every 100 hours of operation or annually replace the paper element Z231KH AU Z251KH AU 1 Unlatch the cover and remove the air cleaner cover 2 Remove the air cleaner element and precleaner 1 Air cleaner cover A UNLATCH B REMOVE 3 Remove the precleaner...

Страница 58: ...the shroud 2 Check to see if the engine s cooling fins are blocked with dust and dirt Clean them with compressed air if required Z231BR AU Z251BR AU Clean every 100hr or every 1 year whichever comes faster Z231KH AU Z251KH AU Clean every 100hr 1 Shroud Z251BR AU 1 Shroud Z231KH AU Z251KH AU 1 Shroud 6 Checking the spark plug Check the spark plug condition and gap every 100 hours of operation Repla...

Страница 59: ...ug CHAMPION XC12YC A 0 75 mm 0 03 in 7 Checking the fuel filter WARNING To avoid serious injury or death Be sure to stop the engine and remove the key when attempting to make the following checks and changes Never fail to check the fuel lines periodically The fuel lines are subject to wear and aging Fuel may leak out onto the running engine causing a fire The fuel line is made of rubber and ages r...

Страница 60: ... to enter into the fuel pump Entrance of dust and dirt causes malfunction of the fuel pump 1 Fuel valve 2 Fuel tank 3 Fuel line 4 Pipe clamp A CLOSE OFF B OPEN 1 Fuel line 2 Pipe clamp 3 Fuel filter 1 Fuel line 2 Pipe clamp 1 Fuel line 2 Pipe clamp 3 Fuel pump 1 Fuel line 2 Pipe clamp A Muffler B Carburetor 8 Checking the battery condition DANGER To avoid the possibility of battery explosion For t...

Страница 61: ...e costs The original battery is maintenance free but needs some servicing If the battery is weak the engine will be difficult to start and the lights will be dim It is important to check the battery periodically When exchanging an old battery with a new one use a battery of equal specifications as described in the following table Battery type Volts V Reserve capacity min Cold cranking amps Normal ...

Страница 62: ...of direct sunlight 2 The battery self discharges while it is stored Recharge it once every 3 months in hot seasons and once every 6 months in cold seasons 9 Adjusting the throttle cable Z231BR AU Z251BR AU 1 Move the throttle lever to the FAST position 1 Throttle lever 2 Attempt to pass a pin A with a diameter of 3 mm through the holes indicated 1 Bolt 2 Throttle lever cable sheath A Pin with a di...

Страница 63: ...l 3 4 to 1 turn 8 Fill the engine with the proper oil to the FULL or F mark on the dipstick Always check the oil level with the dipstick before adding more oil 9 Reinstall the oil fill cap dipstick and tighten securely 10 Start the engine and check for oil leaks Recheck oil level before placing the engine into service Stop the engine correct any leaks and allow a minute for the oil to drain down t...

Страница 64: ... The resulting symptoms in hydrostatic systems may be 1 Noisy operation 2 Lack of power or drive after short term operation 3 High operation temperature and excessive expansion of oil Before starting make sure the transaxle is at the proper oil level If it is not fill to the specifications outlined in this manual The following procedures are best performed with the machine drive wheels off the gro...

Страница 65: ...A Electric clutch Q Adjustment nut If the air gap is too narrow the clutch armature may drag when disengaged resulting in premature failure 2 Checking engine valve clearance Z231KH AU Z251KH AU Consult your local KUBOTA Dealer for this service EVERY AFTER 500 HOURS 1 Cleaning combustion chamber If you do not have the proper tools and or are not mechanically proficient consult your local KUBOTA Dea...

Страница 66: ...n page 55 10 Checking hydraulic hose WARNING To avoid serious injury or death Be sure to stop the engine remove the key and relieve pressure before checking and replacing the hydraulic hose Allow the transmission case to cool down sufficiently oil can be hot and may cause burns 1 Check to see that all lines and hose clamps are tight and not damaged 2 If hoses and clamps are found worn or damaged r...

Страница 67: ...njury or death Be sure to stop the engine and remove the key Blades may be sharp When you handle blades wear heavy gloves or wrap the end of the blades with a rag Mower deck cleaning Before checking or replacing the blades wipe grass and mud off the top and inside of the mower Especially clean inside the belt cover otherwise the belt life will be reduced Checking the blade The blade cutting edges ...

Страница 68: ... and blade To attach blades be sure to install the cup washer between the blade and bolt head Then tighten the bolt securely RCK48P RCK54P 1 Spindle holder 2 Cover 3 Blade 4 Cup washer 5 Bolt IMPORTANT Tighten the blade bolts from 103 to 118 N m 76 to 87 lbf ft of torque The blade bolts have right hand threads Turn them counterclockwise to loosen To prolong the service life of the blades repositio...

Страница 69: ...vious procedure NOTE Tighten the tension pulley bolt securely from 77 6 to 90 2 N m 8 0 to 9 2 kgf m 57 1 to 66 5 lbf ft 1 Tension pulley 2 Belt 3 Bolt 4 Shield PERIODIC SERVICE SERVICE AS REQUIRED 66 Z231BR AU Z231KH AU Z251BR AU Z251KH AU ...

Страница 70: ...Remove both rear wheels 3 Start the engine and run at maximum speed 4 Place the motion control lever in the NEUTRAL LOCK position 5 Loosen the 3 bolts of the guide plate Adjust the guide plate position until the rear axle rotation stops 6 Tighten the rear bolt and place the lever in NEUTRAL LOCK position Check that the rear axle does not rotate If the axle does not stop rotating adjust the HST NEU...

Страница 71: ...g brake Lever position high or low 1 Remove the bolts and select the motion control lever position high or low 2 Tighten the bolts 1 Bolt 2 Flange nut 3 Tab slot A Low position Lever alignment right and left 1 Loosen the bolts 2 Slide both levers forward or rearward to the desired position within tab slots until the levers are aligned 3 Tighten the bolts MOWER DECK LEVEL 1 Anti scalp rollers WARNI...

Страница 72: ...p to the level surface with a short ruler or leveling gauge Reference Height of the blade at the flat surface 76 mm 3 in NOTE There is a difference of blade height between flat surface and ground measurements 6 Check that the left side blade has the same height The difference between both measurements is less than 3 mm 0 125 in 7 If the side to side adjustment is not within the given tolerance adj...

Страница 73: ...sions The difference between both measurements should be less than 6 mm 0 25 in The front side must be lower than the rear side 8 If the front to rear adjustment is not within the given tolerance adjustment is necessary A Front B Rear Front to rear adjustment Less than 6 mm 0 25 in The front side must be lower than the rear side Adjusting the level front to rear 1 Raise up the mower deck to the en...

Страница 74: ... 1 Cutting height fine tuning bolt 2 Jam nut MOWER DECK LEVEL ADJUSTMENT Z231BR AU Z231KH AU Z251BR AU Z251KH AU 71 ...

Страница 75: ... 84 5 82 45 54 61 0 73 2 6 22 7 47 M10 lbf ft N m kgf m 35 5 41 2 48 1 55 8 4 9 5 7 44 9 52 1 60 8 70 5 6 2 7 2 1 2 lbf ft N m kgf m 80 96 108 5 130 2 11 07 13 29 110 132 149 2 179 0 15 22 18 27 M12 lbf ft N m kgf m 57 2 66 5 77 5 90 1 7 9 9 2 76 0 86 8 103 117 10 5 12 0 9 16 lbf ft N m kgf m 110 132 149 2 179 0 15 22 18 27 160 192 217 0 260 4 22 14 26 57 M14 lbf ft N m kgf m 91 2 108 124 147 12 6...

Страница 76: ...8 1 55 9 52 0 3 9 4 9 5 7 5 3 0 4 M12 17 or 19 46 3 53 5 49 9 3 6 62 8 72 6 67 7 4 9 6 4 7 4 6 9 0 5 57 1 66 5 61 8 4 7 77 6 90 2 83 9 6 3 8 0 9 2 8 6 0 6 M14 19 or 22 79 6 92 6 81 6 6 5 107 9 125 5 116 7 8 8 11 0 12 8 11 9 0 9 91 1 108 5 99 8 8 7 123 6 147 0 135 3 11 7 12 6 15 0 13 8 1 2 NOTE Figure 7 on the top of the bolt indicates that the bolt is made of special material Before tightening che...

Страница 77: ...e a month in the hot season and once every 2 months in the cold season 7 Drain the fuel tank fuel lines and carburetor or use a fuel stabilizer to prevent deterioration of the gasoline If you choose to use a fuel stabilizer follow the manufacturers recommendations and add the correct amount for the capacity of the fuel system Fill the fuel tank with clean fresh gasoline Run the engine for 2 to 3 m...

Страница 78: ... or replace the air cleaner Spark plug damaged Adjust the spark plug gap or replace the spark plug Check the spark plug wire connection Fuse blown Replace the fuse The engine oil viscosity is wrong Use oils of different viscosities depending on the ambient temperature The battery becomes weak and the engine does not turn over quick enough Clean battery cables and terminals Charge the battery In co...

Страница 79: ... or blue Excessive engine oil Reduce to the specified oil level Piston ring worn or stuck See your KUBOTA Dealer Engine overheats Engine overloaded Lower speed or reduce load Engine oil insufficient Fill engine oil The engine air intake screen and cooling fins are dirty Clean the air intake screen and cooling fins Air cleaner paper element plugged Clean or replace the air cleaner paper element Eng...

Страница 80: ...rminals are severely corroded and heated up Poor terminal con nection Clean the terminal and tighten securely Keep the terminal clean and tight Apply grease and treat with anti cor rosives The battery electrolyte level drops rapid ly There is a crack or pin holes in the elec trolytic cells Replace the battery Charging system trouble Contact your local KUBOTA Dealer If you have any questions contac...

Страница 81: ...cut Mower deck not level Level the mower deck Ground speed too fast Slow down Blades dull Have blades sharpened Blades worn or damaged Replace the blades Low tire inflation Add air to correct pressure Anti scalp rollers not adjusted correctly Adjust the anti scalp rollers Wheels pressure not adjusted correctly Set both tire pressure to the correct pressure See TIRES on page 38 Blades scalping gras...

Страница 82: ... reset the engine rpm Ground speed too fast Slow down Debris wrapped around mower spindles Clean the mower Front of deck too low Adjust the mower deck See MOWER DECK LEVEL on page 68 If you have any questions contact your local KUBOTA Dealer TROUBLESHOOTING Z231BR AU Z231KH AU Z251BR AU Z251KH AU 79 ...

Страница 83: ...61 engine jump starting 26 operating warning information 23 starting 23 starting in cold weather 26 starting information 24 stopping 25 stopping immediately 25 troubleshooting 75 warming up 26 engine break in 28 engine oil changing Z231BR AU Z251BR AU 51 63 changing Z231KH AU Z251KH AU 53 engine oil filter replacing Z231BR AU Z251BR AU 52 63 replacing Z231KH AU Z251KH AU 60 engine shroud cleaning ...

Страница 84: ...63 O OPC system checking 51 operator s seat 29 lowering 44 raising 44 P parking brake applying 23 releasing 23 parking brake lever 30 precleaner element cleaning except Z251BR AU 48 replacing except Z251BR AU 54 62 PTO switch 37 S safety before operating the machine 5 general information 5 operating on slopes 7 ROPS 6 servicing the machine 8 starting to operate the machine 6 stopping the machine 7...

Страница 85: ...wheels 38 82 Z231BR AU Z231KH AU Z251BR AU Z251KH AU ...

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