Kubota zd 331 Manual Download

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TROUBLESHOOTING

If you have any questions, contact your local KUBOTA Dealer.

Mower loads down
machine.

Engine r.p.m. too low.

Mow at full throttle, check and reset engine r.p.m..

Ground speed too fast.

Slow down.

Debris wrapped around mower
spindles.

Clean mower.

Front of deck lower than rear.

Adjust deck.
(See "MOWER DECK" in "ADJUSTMENT"
section.)

Trouble

Cause

Remedy

Summary of Contents for zd 331

Page 1: ...emperature Gauge 15 Hour Meter 16 COLD WEATHER STARTING 16 BLOCK HEATER OPTION 16 WARMING UP 16 Warm up and Transmission Oil in the Low Temperature Range 16 JUMP STARTING 17 STOPPING THE ENGINE 18 Engine Stop Lever Inside the Hood 18 OPERATING THE MACHINE 19 OPERATING NEW MACHINE 19 Changing Lubricating Oil for New Machines 19 Engine Break in 19 Machine Break in 19 OPERATING FOLDABLE ROPS 20 To Fo...

Page 2: ...40 Hood 40 Front Cover 40 Step 40 HOW TO RAISE THE OPERATOR S SEAT 41 HOW TO TILT UP THE MACHINE 42 HOW TO OPEN THE LEVER GUIDE 43 LIFT UP POINT 44 Front side 44 Rear side 44 DAILY CHECK 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 T...

Page 3: ... Nozzle Injection Pressure 63 EVERY 3000 HOURS 63 Checking Injection Pump 63 EVERY 1 YEAR 63 Replacing Air Cleaner Primary Element and Secondary Element 63 Flush Cooling System and Changing Coolant 64 Anti freeze 65 EVERY 2 YEARS 66 Replacing Hydraulic Hose 66 Replacing Fuel Lines 66 Replacing Radiator Hose 66 Replacing Mower Gear Box Oil Seal 66 Replacing Intake Air Line 66 SERVICE AS REQUIRED 66...

Page 4: ...CONTENTS MACHINE STORAGE 78 REMOVING THE MACHINE FROM STORAGE 78 TROUBLESHOOTING 79 ENGINE TROUBLESHOOTING 79 BATTERY TROUBLESHOOTING 80 MACHINE TROUBLESHOOTING 80 MOWER TROUBLESHOOTING 81 ...

Page 5: ... 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 RO...

Page 6: ...ace 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 caut...

Page 7: ... 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 A...

Page 8: ...e 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 a...

Page 9: ...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 ...

Page 10: ...SAFE OPERATION 6 7 DANGER WARNING AND CAUTION LABELS ...

Page 11: ...7 SAFE OPERATION ...

Page 12: ...SAFE OPERATION 8 ...

Page 13: ...ger 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 WARNIN...

Page 14: ......

Page 15: ...e 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 E...

Page 16: ...SERVICING OF MACHINE 2 1 Mower identification plate 2 Mower serial No 1 ROPS serial No ...

Page 17: ...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...

Page 18: ... 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...

Page 19: ...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 1...

Page 20: ... 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 ...

Page 21: ...e 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 ...

Page 22: ...INSTRUMENT PANEL AND CONTROLS 8 ILLUSTRATED CONTENTS 1 Anti scalp roller Front swivel type 29 2 Anti scalp roller Front 29 3 Anti scalp roller Rear 29 ...

Page 23: ...re 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 At...

Page 24: ...ck 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 ...

Page 25: ... 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...

Page 26: ... 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 Checke...

Page 27: ... 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 glo...

Page 28: ...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...

Page 29: ...n 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 ...

Page 30: ... warm up period the troubles such as seizure breakage or premature wear may develop BWarm up and Transmission Oil in the Low Temperature Range Hydraulic oil serves as transmission oil In cold weather the oil may be cold with increased viscosity This can cause delayed oil circulation or abnormally low hydraulic pressure for some time after engine start up This in turn can result in a trouble in the...

Page 31: ...tive red or pos terminal of the dead battery and clamp the other end of the same cable to the positive red or pos terminal of the helper battery 7 Clamp the other cable to the negative black or neg terminal of the helper battery 8 Clamp the other end to the engine block or the frame of the disabled machine as far from the dead battery as possible 9 Start the helper vehicle and let its engine run f...

Page 32: ...s turned OFF If the engine does not stop make sure the motion control levers are in the NEUTRAL LOCK position the PTO lever is OFF the mower lowered to the ground and apply the parking brake then carefully get off the machine Then open the hood and pull engine stop lever Red mark and hold it until the engine stops Then contact your local KUBOTA Dealer immediately To avoid personal injury A Do not ...

Page 33: ...ODIC SERVICE section To avoid serious injury or death A Do not operate the mower without the deflector shield in the down position To avoid personal injury A The machine relies upon the engine driven transmission for speed direction and steering 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 imme...

Page 34: ... possible interference with installed implements and attachments if interference occurs contact your KUBOTA Dealer BTo Fold the ROPS 1 Unscrew the knob bolts 1 to 2 turns 2 Remove both lock pins 3 Fold the ROPS To avoid personal injury A Hold the ROPS tightly with both hands and fold the ROPS slowly and carefully 4 Align lock pin holes and insert both lock pins and secure them with the hair pins T...

Page 35: ... Tighten the knob bolts slightly To avoid personal injury A Make sure that both lock pins are properly installed as soon as the ROPS is in the upright position and secured with the hair pins BAdjustment of Foldable ROPS A Adjust free fall of the ROPS upper frame regularly A If you feel less friction when folding the ROPS tighten the nut 1 until you feel the right friction in the movement and then ...

Page 36: ...e forward by itself C Suspension adjustment Pull the suspension adjust knob and turn it to achieve the optimum suspension setting After setting push back the knob C Lumbar support adjustment Turn the lumbar support adjust lever to the desired position C Arm rest Arm rest may be set at upright position if desired C Arm rest angle adjustment Turn the arm rest angle adjust knob to the desired angle C...

Page 37: ...ion is attempted when the engine is still cold the hydraulic system may be damaged A Do not operate at slow Engine rpm Move the throttle lever above 1 2 A If noises are heard when implement is lifting after the hydraulic lift control pedal has been activated the hydraulic mechanism is not adjusted properly Contact your local KUBOTA Dealer for adjustment A Do not depress the hydraulic lift control ...

Page 38: ...ition rapidly Sudden direction changes could cause loss of control or damage to the machine or property A Do not make sharp turns at high speeds Fast and sharp turns could cause loss of control A Motion control levers must be in NEUTRAL LOCK position to safely enter and exit the operator s seat or to carry out maintenance and safety checks C Neutral lock position A Forward and reverse movement of ...

Page 39: ... linkages are adjustable If adjustment is required see ADJUSTMENT section We recommend you to contact your local KUBOTA Dealer C Re start on the slopes To avoid personal injury A Do not stop or change directions on the slopes These operations could cause loss of the machine traction or control Starting procedure on the slopes is different from the usual start mode on a flat surface understand how ...

Page 40: ...ight motion control lever further forward than the left motion control lever For forward travel to the left GENERAL RIGHT TURN A Push left motion control lever further forward than the right motion control lever For forward travel to the right SHARP ZERO LEFT TURN A Push right motion control lever forward and pull left motion control lever rearward at the same time SHARP ZERO RIGHT TURN A Push lef...

Page 41: ...rsonal injury A Park the machine on level ground If necessary to park on an incline 1 Stop the machine 2 Apply the parking brake then 3 Stop the engine A If you stop the engine on an incline without applying the parking brake the machine could move and run away A The parking brake pedal is for parking and emergency use only If the parking brake is applied when the motion control levers are not in ...

Page 42: ...ply parking brake A Lower all implements to the ground A Shut off the engine A Remove the key A Place the motion control levers in the NEUTRAL LOCK position If necessary to park on an incline be sure to chock the wheels on the downhill side to prevent accidental rolling of the machine TRANSPORTING 1 Transport the machine on a trailer A Turn the fuel valve to the OFF position A Fasten the machine t...

Page 43: ...inch 5 For best appearance grass should be cut in the afternoon or evening when it is free of moisture ADJUSTING CUTTING HEIGHT To avoid serious injury or death A Do not engage the mower in the transport position 1 Before adjusting cutting height check that all tire pressures are correct If necessary adjust to the correct tire pressure 2 To set the cutting height depress the hydraulic lift control...

Page 44: ...OPERATING THE MOWER 30 1 Anti scalp roller Front swivel type 2 Anti scalp roller Rear 1 Anti scalp roller Front swivel type 2 Anti scalp roller Rear 1 Anti scalp roller Front 2 Anti scalp roller Rear ...

Page 45: ... 0 1 19 mm 1 75 1 3 13 mm 2 00 1 2 19 mm 2 25 2 4 13 mm 2 50 2 3 19 mm 2 75 3 5 13 mm 3 00 3 4 19 mm 3 25 4 6 13 mm 3 50 4 5 2 19 mm 3 75 4 7 3 13 mm 4 00 4 6 3 19 mm 4 25 4 7 3 13 mm 4 50 4 7 3 19 mm 4 75 4 7 3 25 mm 5 00 4 7 3 31 mm 1 Marked dimension shows ground clearance of bolt shift type 2 For cutting heights above 3 5 The anti scalp rollers will still be effective against scalping 3 Use it...

Page 46: ... safety features are built in BStarting To avoid serious injury or death A Engine components can get extremely hot from operation To prevent severe burns do not touch these areas while the engine is running or immediately after it is turned off Never operate the engine without heat shields or guards 1 Sit on the operator s seat 2 Start the engine 3 Engage the PTO lever 4 Disengage the parking brak...

Page 47: ...ts frequently and keep them tightened BInflation Pressure Though the inflation pressure is factory set to the prescribed level it naturally drops slowly in the course of time Thus check it everyday and inflate as necessary WHEELS A When re fitting a wheel tighten the wheel bolt to the following torques then recheck after traveling 200 m 200 yards changing directions several times Wheels with bevel...

Page 48: ...leeve and wheel bolt 5 Remove the wheel from assembly yoke C Installing 1 Install the replacement wheel 2 Install the wheel bolt and lock nut with nylon sleeve 3 Install the nut A Insert the wheel bolt from the outside of the yoke A Tighten the nut gradually until wheel bearing play is eliminated and wheel turns freely by hand Reference 4 Lower machine Tightening torque 20 to 25 N m 14 8 to 18 4 f...

Page 49: ...il filter Replace every 200Hr 60 5 Hydraulic oil filter Replace every 400Hr 62 6 Motion control lever pivot Adjust every 200Hr 60 7 Front axle pivot Adjust every 200Hr 61 8 Safety device Check every 50Hr 49 9 Mower gear box oil Check every 50Hr 50 Change every 150Hr 57 10 Greasing without mower every 50Hr 51 11 Throttle Cable Oil every 50Hr 52 12 Air cleaner primary element Clean every 100Hr 53 1 ...

Page 50: ...equired maintenance on the engine according to the above instruction Please see the Warranty Statement in detail 16 Parking brake Adjust every 100Hr 54 2 17 Battery condition Check every 100Hr 56 18 Radiator hose and clamp Check every 200Hr 59 Replace every 2 years 66 2 19 Hydraulic hose Check every 200Hr 59 Replace every 2 years 66 2 20 Intake air line Check every 200Hr 61 Replace every 2 years 6...

Page 51: ...37 MAINTENANCE PERIODIC SERVICE CHART LABEL 1 Part No K3181 6552 3 ENGLISH 2 Part No K3181 6553 3 SPANISH ...

Page 52: ...15W 40 77 0 to 25 SAE20 SAE10W 30 or 15W 40 32 to 77 Below 0 SAE10W SAE10W 30 or 15W 40 32 Transmission case with filter hose Rear axle gear case RH LH 12 1 L 12 8 U S qts KUBOTA UDT or SUPER UDT fluid 1 Mower gear box 0 4 L 0 4 U S qts SAE90 gear oil API service classification more than GL 3 Greasing No of greasing points Capacity Type of grease Motion control lever pivot bushing and contact posi...

Page 53: ...to EN 590 or ASTM D975 are recommended A No 2 D is a distillate fuel of lower volatility for engines in industrial and heavy mobile service SAE J313 JUN87 A Since this engine adopts EPA Tier 4 and Interim Tier 4 standards the use of low sulfur fuel or ultra low sulfur fuel is mandatory in EPA regulated area North America Therefore please use No 2 D S500 or S15 diesel fuel as an alternative to No 2...

Page 54: ...ing A Never open the step while the engine is running A Do not touch muffler or exhaust pipes while they are hot Severe burns could result BHood To open the hood pull the latch lever frontward BFront Cover To open the front cover pull the bottom edge of the front cover BStep To open the step pull the grip 1 Latch lever 2 Hood A RELEASE 1 Hood 1 Front cover 1 Step 2 Grip A PULL ...

Page 55: ...g 2 Pull the latch lever on the seat panel frontward 3 Raise the operator s seat to the LOCK position C Lower To avoid personal injury A Do not drop the seat to close it A Watch your hands Do not place your hands under the seat when closing 1 Pull up the seat support rod and release the LOCK 2 Lower the seat slowly to lock 3 Slide the seat to proper position 1 Latch lever A PULL 1 Operator s seat ...

Page 56: ...he machine 1 Lower the forward right anti scalp roller to the lowest position RCK72 RCK60 only 2 Fully open the front cover 3 Unfold the tilt lever 4 Keep the front cover opened 5 Remove two L lips 6 Insert L pins to both sides of the front axle to position the front wheels As shown below 7 Turn the tilt lever clockwise to raise the axle to the stop 8 Remove the L pin of the raised wheel and inser...

Page 57: ...W TO OPEN THE LEVER GUIDE To avoid personal injury A Park the machine on a firm and level surface A Stop the engine remove the key and apply the parking brake 1 Remove the screw of the lever guide 2 Pull up the lever guide How to install the lever guide 1 Install the lever guide 2 Tighten the screw A If the lever guide is out of alignment with the motion lever move the lever guide to align it with...

Page 58: ... and the parking brake securely set or chock the rear wheels 1 Front axle support 2 Nylon sling 3 Jack 1 Rear frame 2 Nylon sling 3 Bottom plate 4 Jack No Check item Ref Page Walking around the machine 1 Tire pressure wear and damage 33 47 2 Oil and water leak 3 Engine oil level 45 4 Transmission fluid level 48 5 Coolant level in the radiator and the recovery tank 48 6 Damage of machine body tight...

Page 59: ...e remove all of the old oil and oil filter Never mix two different types of oil 6 Use the proper Engine Oil SAE according to the ambient temperatures See LUBRICANTS in MAINTENANCE section While sitting in the operator s seat 1 Motion control lever 2 Parking brake Turning the key switch ON 1 Performance of the Easy Checker TM light 14 Starting the engine 1 Color of the exhaust fumes 2 Safety start ...

Page 60: ...y 5 hours of operation check to be sure the radiator screen and the bonnet screen are clean Dirt or chaff on the radiator screen or bonnet screen decrease cooling performance 1 Remove the radiator screen and the bonnet screen and remove all foreign material 2 Remove the dust from between the fins and the tube 3 Tighten the fan drive belt as necessary For this refer to EVERY 100 HOURS in PERIODIC S...

Page 61: ...essure shown in the Operator s Manual A Do not use tires larger than specified BInflation Pressure Though the inflation pressure is factory set to the prescribed level it naturally drops slowly in the course of time Thus check it and inflate as necessary 1 Radiator screen 1 Bonnet screen Tire sizes Recommended Inflation Pressure Front 15 x 6 0 6 Semi pneumatic Non Flat Tire Rib 15 x 6 0 6 4PR Rib ...

Page 62: ...Check the coolant level daily both the radiator and the recovery tank before starting engine 1 Remove the radiator cap and check to see that the coolant level is just below the fill port 2 Check to see that the coolant level is between the FULL and LOW marks of recovery tank 3 When the coolant level drops due to evaporation add water only up to just below the fill port of the radiator and the full...

Page 63: ...control levers to the NEUTRAL LOCK position 4 Turn the key switch to START position 5 The engine must not crank Test 2 OPERATOR ON THE SEAT 1 Do not set the parking brake release it from test 1 2 Shift the PTO lever to DISENGAGE OFF position 3 Set the motion control levers to the NEUTRAL LOCK position 4 Turn the key switch to START position 5 The engine must not crank Test 3 OPERATOR ON THE SEAT 1...

Page 64: ...machine 6 The engine must shut off Test 7 OPERATOR ON THE SEAT 1 Start the engine 2 Do not set the parking brake 3 Shift the PTO lever to ENGAGE ON position 4 Stand up Do not get off the machine 5 The engine must shut off A If the engine cranks Test 1 through 4 consult your local KUBOTA Dealer to have the unit checked before operation BChecking Gear Box Oil Level To avoid personal injury A Always ...

Page 65: ...onal injury A Be sure to stop the engine and remove the key before greasing Grease the following location 1 King pin LH RH 2 Center pin 3 Front wheel LH RH 1 Motion control lever pivot bushing LH RH 1 Motion control lever contact position LH RH ...

Page 66: ...PERIODIC SERVICE 52 BOiling 1 Machine universal joint 1 Seat adjuster 1 Throttle cable Oil 1 Throttle cable Oil ...

Page 67: ...ty place to get rid of large particles of dust and dirt BChecking Fuel Lines and Fuel Filter To avoid personal injury A Be sure to stop the engine and remove the key when attempting to make the following checks and changes A 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 connections...

Page 68: ...urface A Stop the engine and chock the wheels before checking or adjusting A Wrong adjustment may cause machine damage 1 Check brake spring 1 Place the motion control levers to the NEUTRAL LOCK position 2 Be sure to chock the rear wheels 3 Apply the parking brake to the lock position 4 Check the length of the brake springs on both sides 5 Release the parking brake completely 6 Hold the brake rod l...

Page 69: ...ace the motion control lever to the NEUTRAL LOCK position 2 Apply the parking brake to the lock position 3 Loosen the lock nuts 4 Adjust the spring length to the recommendation 5 Lock the nuts 6 Check the brake spring play to the recommendation If there is no play adjust the brake spring play again 7 Adjust the other side spring to the same dimension 2 Check on the slope 1 Place the machine on a 1...

Page 70: ...ep open sparks and flames away from the battery at all times especially when charging the battery To avoid personal injury A When charging battery ensure that the vent caps are securely in place if equipped A When disconnecting the cables from the battery start with the negative terminal first When connecting the cables to the battery start with the positive terminal first A Never check battery ch...

Page 71: ...essary EVERY 150 HOURS BChanging Gear Box Oil To avoid personal injury A Be sure to stop the engine and remove the key before changing the oil 1 To drain the used oil remove the drain plug and filler plug at the gear box and drain the oil completely into the oil pan 2 After draining reinstall the drain plug 3 Remove the oil level check plug 4 Fill with the new oil up to the check plug port See LUB...

Page 72: ...er Cartridge To avoid personal injury A Be sure to stop the engine and remove the key before changing the oil and the oil filter cartridge A Allow engine to cool down sufficiently oil can be hot and may cause burns 1 The oil filter cartridge must be changed every 200 service hours 2 Apply a slight coat of oil onto the rubber gasket of new cartridge 3 Tighten the filter quickly until it contacts th...

Page 73: ...ked BChecking Hydraulic Hose To avoid personal injury A Be sure to stop the engine and remove the key before checking and replacing the hydraulic hose A Allow the transmission case to cool down sufficiently oil can be hot and may cause burns Check to see if hydraulic hoses are properly fixed every 200 hours of operation 1 Check to see that all lines and hose clamps are tight and not damaged 2 If h...

Page 74: ...l normally lowers a little Add fluid to proper level Check for oil leaks around filter gasket A To prevent serious damage or premature failure to the hydraulic system use only a KUBOTA genuine filter BAdjusting the Motion Control Lever Pivot To avoid personal injury A Be sure to stop the engine and set the parking brake to ON before checking 1 Set the motion control lever in NEUTRAL position 2 Sli...

Page 75: ... before changing or checking the oil A Allow transmission case to cool down sufficiently oil can be hot and may cause burns The fluid in the transmission case is also used for the hydrostatic drive system 1 To drain the transmission oil place oil pan underneath the transmission case and the rear axle gear case RH LH and remove the drain plug at the bottom of the transmission case and the rear axle...

Page 76: ...ilter Cartridge To avoid personal injury A Be sure to stop the engine and remove the key before changing the oil filter cartridge A Allow transmission case to cool down sufficiently oil can be hot and may cause burns 1 The oil filter cartridge must be changed every 400 service hours 1 Drain plug 2 Transmission oil filter 1 Drain plug 2 Rear axle gear case LH 1 Oil level dipstick 2 Oil plug and bre...

Page 77: ...draulic system use only a KUBOTA genuine filter BReplacing Fuel Filter Consult your local KUBOTA Dealer for this service EVERY 1500 HOURS BChecking Fuel Injection Nozzle Injection Pressure Consult your local KUBOTA Dealer for this service EVERY 3000 HOURS BChecking Injection Pump Consult your local KUBOTA Dealer for this service EVERY 1 YEAR BReplacing Air Cleaner Primary Element and Secondary Ele...

Page 78: ... instruction 6 After flushing fill with clean water and anti freeze until the coolant level is just below the fill port on the radiator Install the radiator cap securely 7 Fill with coolant up to the FULL mark on the recovery tank 8 Start and operate the engine for a few minutes 9 Stop the engine and let cool 10 Check coolant level of recovery tank add coolant if necessary and install the drain pl...

Page 79: ...a target temperature When mixing stir it up well and then fill into the radiator 4 The procedure for the mixing of water and anti freeze differs according to the make of the anti freeze and the ambient temperature Refer to SAE J1034 standard more specifically also to SAE J814c A When the anti freeze is mixed with water the anti freeze mixing ratio must be less than 50 D At 1 013 x 10 Pa 760mmHg pr...

Page 80: ...our local KUBOTA Dealer for this service BReplacing Intake Air Line See Checking Intake Air Line in EVERY 200 HOURS in PERIODIC SERVICE section SERVICE AS REQUIRED BReplacing Fuses Replacement of the fuse 1 Raise the operator s seat 2 Remove the blown fuse 3 Place a new fuse of the same capacity in position A If the new fuse happens to blow out within a short time contact your dealer for inspectio...

Page 81: ...T UP THE MACHINE in PERIODIC SERVICE section 2 Wedge a block of wood between the blade and mower housing or use a box wrench over the pulley nut to prevent the spindle from rotating while removing the blade bolts loosen the blade bolt as illustrated A Use the proper metric size box or socket wrench to tighten or loosen the blade mounting bolt FUSE NO CAPACITY A Protected circuit 1 20 A Engine stop...

Page 82: ... blade to slip excessively Replace the 2 cup washers if either is damaged 6 Before checking or replacing the blade wipe grass and mud off the top and inside of the mower Especially clean up the inside of the belt cover because otherwise the belt life will be reduced A Tighten the three blade bolts to 98 to 117 6 N m 10 to 12 kgf m 72 to 87 ft lbs of torque A The blade bolts have Right hand threads...

Page 83: ...k and slip the belt over the top of the gear box 6 To install a new belt reverse the above procedure A Tighten bracket bolts securely 77 6 to 90 2 N m 8 0 to 9 2 kgf m 57 1 to 66 5 ft lbs BBleeding Fuel System Air must be removed 1 When the fuel filter or lines are removed 2 When tank is completely empty 3 After the machine has not been used for a long period of time C Bleeding procedure is as fol...

Page 84: ... in ADJUSTMENT section 5 Pull the latch lever and raise the operator s seat 6 Remove the connector from the seat safety switch then temporarily install a jumper wire across the terminals in the connector of the wire harness To avoid personal injury A Do not operate the machine with a jumper wire A If you feel you are unable to make the following adjustments correctly and safety please contact your...

Page 85: ... adjust again 10 Adjust the other side equally 11 After adjustment be sure to stop the engine immediately BMAXIMUM SPEED FORWARD Consult your local KUBOTA Dealer for this service BMOTION CONTROL LEVER ALIGNMENT C Check the alignment Check the gap and space between the levers at the maximum forward position If positions of the control levers are unequal an adjustment is necessary To avoid personal ...

Page 86: ... Stop the engine and remove the key A Wait for all moving parts to stop A The flattest cut can be achieved by having the anti scalp rollers adjusted off the ground Check anti scalp roller adjustments each time the mower deck cutting height is changed It is recommended that all the anti scalp rollers be kept off the ground to minimize scuffing 1 Check the machine tire pressure Inflate tires to the ...

Page 87: ...vel Side to Side A Mower deck anti scalp rollers should not contact the ground 1 Raise the mower deck to the transport position Also the top end 2 Turn the cutting height set dial to the 3 in cutting height position 3 Lower the mower deck 4 Position the right mower blade in the Side to Side position 5 Measure from outside blade tip to the level surface with a short ruler or leveling gauge Referenc...

Page 88: ...p the engine remove the key and remove the mower u joint while checking or adjusting the level of the mower deck A Check the machine tire pressure Inflate tires to the correct pressure See TIRES AND WHEELS section C Checking level Front to Rear A Mower deck anti scalp rollers should not contact the ground 1 Raise the mower deck to the transport position Also the top end 2 Turn the cutting height s...

Page 89: ... on the wood block 4 Lower the mower deck 5 Loosen the lock nuts of the front side of the machine 6 Adjust the cutting height fine tuning bolts to set 76 mm 3 in height Both front side bolts must be adjusted 7 Lock the nuts 8 Adjust the other side equally A The difference between both measurements should be less than 6 mm 1 4 in Front side must be lower than rear side 9 Check the front to rear lev...

Page 90: ... 3 3 0 3 5 3 8 ft lbs N m kgf m 35 42 47 5 57 0 4 84 5 82 45 54 61 0 73 2 6 22 7 47 M10 ft lbs 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 ft lbs 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 ft lbs 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 ft lbs N m kgf m 110 132 149 2 179 0 15 22 18 27 160 192 217 0 260 4 22 14...

Page 91: ...9 3 45 1 42 2 2 9 4 0 4 6 4 3 0 3 35 4 41 2 38 3 2 9 48 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 86 1 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 A Figure 7 on the top of the bolt indicates that the bol...

Page 92: ...doors in a dry area that is protected from sunlight and excessive heat If the machine must be stored outdoors cover it with a waterproof tarpaulin 9 Jack the machine up and place blocks under the front and rear axles so that all four tires are off the ground Keep the tires out of direct sunlight and extreme heat A When washing the machine be sure to stop the engine Allow sufficient time for the en...

Page 93: ...ore it indoors Install it on the machine only when the machine is going to be used Insufficient engine power A Insufficient or dirty fuel A The air cleaner is clogged A Check the fuel valve position A Check the fuel system A Clean the element Engine stops suddenly A Insufficient fuel A Check the fuel valve position A Refuel A Bleed the fuel system if necessary Exhaust fumes are colored Black A Fue...

Page 94: ...attery was used too much without recharging A Charge battery sufficiently A Charge the battery properly Recharging is impossible A Battery life expired A Replace battery Terminals are severely corroded and heat up A Poor terminal connection A Clean the terminal and tighten securely A Keep the terminal clean and tight Apply grease and treat with anti corrosives Battery electrolyte level drops rapid...

Page 95: ...r to correct pressure A Anti scalp rollers not adjusted correctly A Adjust anti scalp rollers A Wheels pressure not adjusted correctly A Set both tire pressures to the correct pressure See TIRES in TIRES AND WHEELS section Blades scalping grass A Cutting height too low A Raise cutting height A Turning speed too fast A Reduce speed on turns A Ridges in terrain A Change mowing pattern A Rough or une...

Page 96: ...loads down machine A Engine r p m too low A Mow at full throttle check and reset engine r p m A Ground speed too fast A Slow down A Debris wrapped around mower spindles A Clean mower A Front of deck lower than rear A Adjust deck See MOWER DECK in ADJUSTMENT section Trouble Cause Remedy ...

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Kubota zd 331, Manual

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