OPERATOR'S MANUAL U.S.A. : KUBOTA TRACTOR CORPORATION 3401 Del Amo Blvd., Torrance, CA 90503, U.S.A. Telephone : (310)370-3370 Western Division : 1175 S. Guild Avc., Lodi, CA 95240 Telephone : (209)334-9910 Central Division : 14855 FAA Blvd., Fort Worth, TX 76155 Telephone : (817)571-0900 Northern Division : 6300 at One Kubota Way, Groveport, OH 43125 Telephone : (614)835-1100 Southeast Division : 1025 Northbrook Parkway, Suwanee, GA 30024 Telephone : (770)995-8855 Canada : KUBOTA CANADA LTD.
ABBREVIATION LIST Abbreviations API Definitions American Petroleum Institute ASTM American Society for Testing and Materials, USA CECE Committee for European Construction Equipment DIN German Institute for Standards, Federal Republic of Germany EN European Standard FOPS FRONT Hi Falling Object Protective Structures "Front" means the front view towards the boom and dozer High speed ISO International Standardization Organization JIS Japanese Industrial Standard L L/min Volume (Liter) Liter pe
GENERAL SYMBOLS The instruments and operation elements have been marked with a series of symbols in order to simplify the operation of your excavator. These symbols are listed below with the respective descriptions.
FOREWORD You are now the proud owner of a KUBOTA excavator. This excavator is a product of KUBOTA quality engineering and manufacturing. It is made of excellent materials and under rigid quality control systems. It will give you long, satisfactory service. To obtain the best use of your excavator, please read this manual carefully. It will help you become familiar with the operation of the excavator and contains many helpful hints about excavator maintenance.
CONTENTS SAFE OPERATION ............................................................................................ -1 DEALER SERVICE...................................................................................................... 1 TECHNICAL DATA...................................................................................................... 2 DESCRIPTION OF MACHINE PARTS........................................................................ 3 INSTRUMENT PANEL AND CONTROL ELEMENTS............
CONTENTS STARTING WITH AN AUXILIARY BATTERY ....................................................... 26 Observe Following Guidelines when Starting with an Auxiliary Battery.......................... 26 CHECK POINTS AFTER STARTING THE ENGINE ............................................. 27 STOPPING THE ENGINE...................................................................................... 27 Engine Stop Button..............................................................................................
CONTENTS Cup Holder...................................................................................................................... 57 DAILY CHECKS..................................................................................................... 57 Checking Coolant Level.................................................................................................. 57 Checking Fuel Level .......................................................................................................
CONTENTS EVERY 3000 SERVICE HOURS ........................................................................... 75 Checking Injection Pump ................................................................................................ 75 ANNUAL SERVICING............................................................................................ 75 Electrical Wiring and Fuses ............................................................................................ 75 Checking the Electrical Circuit .....
SAFE OPERATION -1 SAFE OPERATION Careful operation is your best insurance against an accident. Read and understand this manual carefully, before operating the excavator. Every user, however experienced, should carefully read and understand this manual and those of the attachments and accessories before operating the excavator. The owner is obliged to inform all operators of these instructions in detail. Keep this manual in the storage location.
-2 SAFE OPERATION 9. Check the surroundings carefully before using the excavator or when attachments are being attached. A Pay attention to the overhead clearance with electric wires. 11. Do not wear baggy, torn or oversized clothing when working with the excavator as such clothing can get caught in rotating parts or control elements which can cause accidents or injuries. Wear adequate safety clothing, e.g. safety helmet, safety shoes, eye protection, ear protection, working gloves, etc.
SAFE OPERATION 2. OPERATING THE EXCAVATOR 1. Mount and dismount the machine safely. Always face the machine. Always use handrails and available steps and keep yourself well balanced. Do not grab or hold any of the control levers and switches. Do not jump on or off the machine, whether stationary or in motion. 2. Start and control the excavator only from the operator's seat. The driver should not lean out of his seat when the engine is running. 3.
-4 3. SAFE OPERATION AFTER OPERATION Before leaving the machine, A Park the excavator on a firm, flat and level surface. If this is not possible, park across the slope. A Lower the attachments and the dozer blade to the ground. A Stop the engine. A Release pressure in the hydraulic system. A Lock all control levers. A Remove the key. A Lock the cab door (if equipped) 4. SAFE LOADING AND TRANSPORT OF THE EXCAVATOR 1. Observe all regulations concerning the transport of excavators on public roads. 2.
SAFE OPERATION Max. drawbar pull at coupling hook 116.9 kN (11920 kgf) Max. vertical load at coupling hook 12.1 kN (1234 kgf) -5 7. Do not open the radiator cap before the radiator has cooled down sufficiently First loosen the cap to the first stop and allow the system enough time to release the remaining pressure. Then loosen the cap completely. 7. Do not use the hooks on the roof of CAB for lifting the excavator. 5.
-6 SAFE OPERATION 13. To avoid fire, do not heat the hydraulic components (tanks, pipes, hoses, cylinders) before they have been drained and washed. 14. Use eye protection or a face mask to protect the eyes and respiratory system against dust and other foreign particles. 15. Securely support excavator with stands or suitable blocking before working underneath. For your safety, do not work under any hydraulically supported devices. They can settle, suddenly leak down, or be accidentally lowered. 16.
SAFE OPERATION 6.
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SAFE OPERATION -9
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SAFE OPERATION -11
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SAFE OPERATION 7. 1. 2. 3. 4. -13 CARE OF DANGER, WARNING AND CAUTION LABELS Keep danger, warning and caution labels, clean and free from obstructing material. Clean danger, warning and caution labels with soap and water, dry with a soft cloth. Replace damaged or missing danger, warning and caution labels with new labels from your KUBOTA dealer.
DEALER SERVICE DEALER SERVICE Your KUBOTA dealer is always ready to help so that your excavator offers the best performance. After having carefully read these instructions, you will realize that much of the routine maintenance can be done by yourself. Your KUBOTA dealer is responsible for servicing and the delivery of spare parts. When ordering spare parts from your KUBOTA dealer, always mention the serial number of the excavator and the engine. Note these numbers right away in the supplied lines.
2 TECHNICAL DATA TECHNICAL DATA KUBOTA EXCAVATOR U48-4 Model name Type Operating weight (including operator's) kg Canopy CAB 4685 4775 Water cooled 4 cycle diesel engine with 4 cylinder Type (No air conditioner type) V2607-DI-E3-BH-6 (Air conditioner type) V2607-DI-E3-BH-4 Model name Engine Total displacement cc 2615 Engine power SAE J1955 gross Rated speed kW 31.2 rpm 2200 Low idling speed rpm 1050 to 1200 Unit swing speed rpm 9.3 Fast km/h 4.9 Slow km/h 2.
DESCRIPTION OF MACHINE PARTS DESCRIPTION OF MACHINE PARTS DEPICTED CONTENTS (1) Bucket cylinder (2) Arm (3) Bucket link 2 and 3 (4) Bucket link 1 (5) Bucket (6) Swing bracket (7) Arm cylinder (8) Canopy (9) Seat (10) Swing frame (11) Boom cylinder (12) Dozer cylinder (13) Dozer blade (14) Boom (15) Cab (16) Drive sprocket (17) Track roller (18) Front idler 3
4 INSTRUMENT PANEL AND CONTROL ELEMENTS INSTRUMENT PANEL AND CONTROL ELEMENTS B Instrument Panel, Switch (1) LCD display (2) Horn switch (3) Travel speed switch (4) Starter switch (9) User setting switch (Switch 1) (10) (Switch 2) (11) AUX port enable switch (Switch 3) (12) Information switch (Switch 4) (13) Display selector switch (Switch 5) (5) Throttle potentiometer (6) Working light switch (7) Auto idle control switch (8) Beacon light switch Ref. page Starter switch..............................
INSTRUMENT PANEL AND CONTROL ELEMENTS 5 B Control Pedals and Levers (1) Drive lever (left) (2) Attachment control lever (left) (3) Boom swing pedal (4) Drive lever (right) (5) Attachment control lever (right) (6) Dozer control lever (7) Drive pedal (left) (8) Drive pedal (right) Ref. page Drive lever (left) ............................................... 31 Attachment control lever (left) .......................... 35, 36 Boom swing pedal ...........................................
6 CHECKS BEFORE START CHECKS BEFORE START DAILY CHECKS In order to avoid damage, it is important to check the condition of the excavator before starting. To avoid personal injury: A Do maintenance work on the excavator only on level ground with the engine off and the lock lever in the "Lock" position. Checks Go around the excavator and check for visual damage and wear. Check coolant level. (See "DAILY CHECKS" in "MAINTENANCE" section.) Check fuel level. Check engine oil level.
CHECKS BEFORE START BDisplay Selector Switch BLCD Display for Normal Operation Press the display selector switch while the engine is running. The LCD meter display will change from one indication mode to the other. Change the two-mode display according to your jobs. C Fuel gauge 7 To avoid personal injury: A Before adding fuel, be sure to stop the engine. A Be sure to keep open flame away from the machine. Otherwise a fire may result.
8 CHECKS BEFORE START C Fuel level audible indication switch (when refueling) 1. With the starter key at the "OFF" position, press the fuel level audible indication switch, and the fuel level can be checked by the buzzer. 2. Start refueling the machine. The buzzer beeping intervals vary according to how much fuel is poured into the tank. As the fuel tank is filled up, the buzzer will sound almost continuously. 3. While refueling the machine, listen to the buzzer to know how much the fuel tank is filled.
CHECKS BEFORE START C Overheat warning 1. If the coolant temperature becomes too high, the message "Water temp. is Rising" appears onscreen for a certain period of time. The LCD display then gets back to normal, but the coolant temperature sensor marker " " starts blinking at 1-second intervals. C Hour-meter Indicates the total operating hours of the machine. How the indicator works A The meter advances one hour after an hour of operation regardless of the engine rpm.
10 CHECKS BEFORE START C Glow indicator The indicator is displayed when the starter key is turned to the "RUN" position but the engine requires preheating. Wait until the indicator goes out, and then start the engine. BLCD Display for Warning C Remaining fuel warning When the fuel level is very low, the lamp (yellow) starts flashing and the following message appears in the display.
CHECKS BEFORE START C Engine oil pressure low warning 11 Information When the engine oil pressure drops too low, the lamp (red) starts flashing and the following message appears in the display. Immediately stop the engine and check the engine oil level. (1) Information switch (1) Oil lamp A If the starter key is turned to the "RUN" position without running the engine and the oil lamp stays off, then the hydraulic system may have failed.
12 CHECKS BEFORE START User settings A If you have any question, consult your KUBOTA Dealer. 3. Press the switch 2 twice to move the cursor into position. Then press the save switch 5 to make the following screen appear. By pressing the switch 4, the year, month, day, hour and minute will be selected in this order. Select an item to readjust. BSetting the Clock 1. Turn the starter key to the "RUN" position. (1) Switch 5 (2) Switch 2 (1) Starter switch (A) STOP (B) RUN (C) START 2.
CHECKS BEFORE START 13 4. Save the new setting with the switch (Switch 5). Press this switch 5 again to set the clock. (1) Switch 5 (1) Switch 5 [Status after setting the clock] BReordering the year/month/day and Changing the AM/PM System to the 24hour One 1. On the user Settings". setting screen, select (1) Switch 5 A Be careful not to accidentally press the switch 5 on the clock setting screen. Otherwise the seconds will be set to "00" and the clock will show the wrong time.
14 CHECKS BEFORE START 3. Press the switch 5 and the following detailed screen shows up. (1) Switch 2 and 3 (2) Switch 4 (3) Switch 5 2. Press the switch 1 to make the menu appear onscreen. 3. Press the switch 2 and 3 to select the log record. Fix this choice with the switch (Switch 5). (A) Year/month/day display (B) Clock display (1) Using the switch 2 and 3, move up and down the items. The year/month/day on Side (A) will be reordered. (2) Using the switch 4, move the cursor to Side (B).
CHECKS BEFORE START BPeriodic Check The following message appears on the LCD display 10 hours before a periodic check. BIf All the Check Points are not Displayed at a Glance on a Single Screen 1. Press the switch 4. 2. Each time the switch 2 or 3 is pressed, the check points scrolled up or down. Press the switch 4 to see the check results. (1) Switch 4 (2) Switch 2 (1) Switch 4 Do the following servicing listed below.
16 CHECKS BEFORE START C Service hour meter When the hour meter reaches the hours circled in the maintenance list below, a message appears. The message shows up as follows. No.
CHECKS BEFORE START 17 BWhen the Check-up is Completed When the check-up is completed, perform the following procedure to make the Periodic Check disappear from the screen. 1. The message below appears onscreen to prompt the completion of the check-up. 2. To take a look at the check points, press the information switch. The check points appear onscreen. 3. When the check-up has been completed, press the switch 5. If not, press the switch 1 to go back to the previous screen.
18 CHECKS BEFORE START BAuto Idle Switch BTravel Speed Switch The switch is used to enable and disable the Auto Idle control. Travel speed will increase when this switch is pushed down. Switching the dual travel speed: 1. Press the travel speed switch. The buzzer beeps twice and the travel speed changes from low to high. The symbol lights up. 2. Press the travel speed switch again, and the buzzer beeps once and the travel speed changes from high speed to low. The symbol goes out.
CHECKS BEFORE START A The travel speed automatically changes into first speed (low speed) when the drive resistance increases while traveling second speed (high speed). Thereafter, when the resistance decreases, it returns to second speed. A If the tracks are clogged with sand or gravel while working on soft ground, lift up the track with the help of the boom, arm and bucket and dozer blade, and let the track rotate to remove the sand and gravel.
20 CHECKS BEFORE START BCab Light Switch BOpening/Closing of CAB Door To turn on the cab light, set the starter switch to the "RUN" position and then the cab light switch to the "ON" position, respectively. 1. Unlock the CAB door and pull the knob. Open the CAB door fully until fixed into place. 2. To close the CAB door, push the release lever down and close the door.
CHECKS BEFORE START BOpening/Closing of Front CAB Window To avoid personal injury: A Keep hands and feet away from the area between front window and CAB frame. Otherwise the operator risks serious pinching or crushing injuries. A Other persons should stay clear when opening the window. To open and close the front window, take the steps below. 1. Push the lock levers beside grip. 21 BOpening/Closing of Side CAB Window 1.
22 CHECKS BEFORE START AIR CONDITIONER Position the inlet selector lever to the desired position. BAir Flow Air in the CAB and fresh air introduced into the CAB flow as shown in the figure. Adjust the five air outlet ports to obtain the desired condition.
CHECKS BEFORE START BAir Control Vent C Front air outlet The front air outlets can be independently adjusted as required. To defrost the windshield, rotate the outlets toward the windshield. 23 BOperation C Heating 1. Adjust the blower (1/2/3) switch and the temperature control dial to achieve the desired temperature level. C Dehumidifying-heating 1. Press and turn on the air-conditioner switch. 2. Turn on the blower (1/2/3) switch. 3.
24 OPERATION OF THE ENGINE OPERATION OF THE ENGINE To avoid personal injury: A Read "SAFE OPERATION" at the beginning of this operator's manual. A Obey the danger, warning and caution labels on the excavator. A To avoid the danger of exhaust fume poisoning, do not operate the machine in a closed building without proper ventilation. A Always start the engine from the operator's seat. Do not start the engine while standing next to the excavator.
OPERATION OF THE ENGINE 4. Set the starter key to the "RUN" position. Hold the key at this position until the " " mark on the display panel disappears. 25 A If you keep the pilot control lock lever at "UNLOCK" and try to start the engine, "Up Lever Lock" appears on the meter panel and the engine cannot be started. Before staring the engine, make sure the pilot control lock lever is set at the "LOCK" position. A When the engine starts, the meter may momentarily turn off and a beep may sound.
26 OPERATION OF THE ENGINE STARTING WITH AN AUXILIARY BATTERY 12. Remove the cloth and replace the vent caps. To avoid personal injury: A Battery gases can explode. Do not smoke and keep sparks and flames away. A Do not start the engine with an auxiliary battery if excavator battery is frozen. A Do not connect the black jumper cable to the negative (-) terminal of the excavator battery. BObserve Following Guidelines when Starting with an Auxiliary Battery 1.
OPERATION OF THE ENGINE CHECK POINTS AFTER STARTING THE ENGINE After starting the engine, but before starting operation, check the following points: 1. Put the throttle potentiometer in the middle between " " and " " symbols and let the engine idle for approx. five minutes. This allows the engine lubricant to warm up and penetrate every part of the engine. 2. Once the engine has warmed up, check: A the warning lamp "Engine oil pressure" has gone out.
28 EXCAVATOR OPERATION EXCAVATOR OPERATION RUNNING-IN OF THE NEW EXCAVATOR The operation and care of the new excavator influences its life span. Your new excavator has been carefully checked and tested before leaving the factory. In spite of this, all movable components must run-in during the first 50 work hours. Do not work with full rpm's and full loads during this period. It is very important to run-in your excavator properly in order to achieve its full performance and longevity.
EXCAVATOR OPERATION BSeat Belt To avoid personal injury or death: A Always use the seat belt with a ROPS/FOPS protection structure. Adjust the seat to the optimal position and buckle up. 29 BPilot Control Lock Lever To avoid personal injury: A To avoid injuries, check safety aspects all around the excavator. A If the pilot control lock lever is pulled down, the engine will fail to start.
30 EXCAVATOR OPERATION DRIVING A Recommended technique for working on a slope. To avoid personal injury or death: A Before starting the engine, make sure that no one is near the excavator. A Before operating the excavator, check the track direction. (Front idler and dozer blade to the front of the excavator). 1. Adjust the engine speed from idling to an intermediate speed. 2. Unlock the pilot control lock lever and pull in the bucket and hold the bucket about 20 to 40 cm above the ground.
EXCAVATOR OPERATION 3. Activate the dozer control lever to raise the dozer. 31 TURNS To avoid personal injury: A Do not change direction on steep slopes, or the excavator could tip over. A Before changing direction, beware of people in the work area. BPivot Turn A Movement as illustrated is done with the dozer blade in front of the operator. (1) Dozer control lever (2) Dozer (A) "Raise" (B) "Lower" BDrive Levers(Right,Left) C Change of Direction while Travelling 1.
32 EXCAVATOR OPERATION C Change of Direction while Stationary 1. Push the left drive lever forward; the excavator will turn in the direction of the arrow of the illustration below. 2. Pull the left drive lever backward; the excavator will turn in the direction of the arrow of the illustration below. BSpin Turn When both drive levers are activated in the opposite directions, both tracks will rotate with the same speed but in opposite directions. The center of rotation is the center of the excavator.
EXCAVATOR OPERATION UP AND DOWNHILL DRIVING To avoid personal injury: A When travelling up or down a slope, use extra caution and follow the instructions below. While traveling uphill, keep the lower edge of the bucket approx. 20 to 40cm above the ground. Although the KUBOTA excavator will not slip easily because of the tracks, it is safer to let the bucket slide over the ground while traveling downhill. Always choose slow speed for uphill and downhill traveling.
34 EXCAVATOR OPERATION TWO PATTERN SELECTION SYSTEM(TPSS) To avoid personal injury: A Study control lever pattern A and pattern B. Then choose the one which is most familiar. A Position the pattern selector lever (located on the right side of operator's seat) in either the lower position (Pattern A) or the upper position (Pattern B). A Engage the lever lock to prevent accidental pattern change. A Familiarize yourself with the pattern selected by operating slowly. BPattern Change 1.
EXCAVATOR OPERATION OPERATION OF THE BOOM To raise the boom, pull the attachment control lever back. The boom is equipped with a cushion cylinder which helps prevent excavated material in the bucket from falling out. At low hydraulic oil temperature, (e.g. after starting the engine in cold weather) the cushioning function will be effected for a short period of time (approx. 3 to 5 seconds). This condition results from the viscosity of the hydraulic oil and is not a sign of malfunction.
36 EXCAVATOR OPERATION OPERATION OF THE BUCKET To dig using the bucket, move the right attachment control lever from the neutral position, left. Moving the control lever right, moves the bucket outwards and empties its contents. BUnit Swing Operation 1. Move the control lever to the left and the upper structure will turn to the left. 2. Move the control lever to the right and the upper structure will turn to the right. BBoom Swing Operation 1. Flip the pedal lock up to unlock the pedal. 2.
EXCAVATOR OPERATION 37 AUXILIARY PORT OPERATION The auxiliary port enable switch is used to operate hydraulic attachment such as hammers. BSelecting the Action Modes The AUX port has been factory-set to three action modes. You can select one of them. Up to five action modes can be preset. Each time the AUX port enable switch (switch 3) is pressed, the action modes change over one after another. And the icon and action mode number on the screen change accordingly.
38 EXCAVATOR OPERATION C Checking the settings of each action mode When an action mode is selected and the " " mark appears at the lower right of the icon, the flow volume setting gets displayed by pressing the switch 4. BAUX Port Handling Procedure (1) Icon (2) Information mark (3) Information switch (Switch 4) (1) Starter switch 1. Turn the starter key to the "RUN" position. Let the engine warm up after start-up for approx. 10 minutes under no load conditions.
EXCAVATOR OPERATION 3. Push the AUX port enable switch (switch 3). 39 4. If the machine is equipped with the AUX 1 port, move the AUX port knob of the right attachment control lever to the right to send oil to the AUX port 1. Move the AUX port knob of the right attachment control lever to the left to send oil to the AUX port 2. If the machine is equipped with the AUX 2 port, move the AUX port knob of the left attachment control lever to the right to send oil to the AUX port 3.
40 EXCAVATOR OPERATION C One way hold [AUX 1 and 2 modes] Press the one way hold switch of the right attachment control lever, and the oil continues to flow through the AUX port 4. Press this switch again or move the AUX port knob, and the oil flow is interrupted. BSetting the Maximum Flow Volume The AUX port has been factory-set to three action modes 1, 2 and 3. The action modes 4 and 5 can also be preset. C How to make the settings 1.
EXCAVATOR OPERATION 41 3. Each time the switch 5 is pressed, the mode number changes. Select your desired setting mode number. 5. Each time the switch 2 or 3 is pressed, the icon changes. Select your desired icons. (1) Icon (2) Mode No. (3) Switch 5 (1) Switch 2 (2) Switch 3 (3) Icon 4. Take the following steps to set the icons. Each time the switch 4 is pressed, the setting cursor (arrow mark) shifts position. Move the cursor above the icon.
42 EXCAVATOR OPERATION A There is no relationship between the icons and the flow control settings. Select icons to suit the images of attachments to be connected. A In an action mode with the disable icon preset, such action mode is skipped even if selected. 6. Set the maximum flow volume for each AUX port. Press the switch 4 to move the setting cursor (arrow mark) to the port 2 position of Thumb port at the right.
EXCAVATOR OPERATION 7. Press the switch 2 or 3 to preset the maximum flow volume. Set the bar to the highest level, and the flow volume will be maximized. Set the bar to the lowest level (no bar displayed), and there will be no oil flow. Then press the switch 4 to go to the next port, and make the settings for all the other ports. 43 8. Go back to Step 3 to make settings for the next action mode.
44 EXCAVATOR OPERATION
EXCAVATOR OPERATION HOW TO RELEASE PRESSURE TRAPPED IN THE HYDRAULIC SYSTEM 1. Lower the attachments and the blade down to the ground. 2. Turn the key to "STOP" position and shut off the engine. 3. After stopping the engine, turn the key to "RUN" position. 4. Set the lock lever to "Unlock" position. 3. Make sure that the flow volume in all the AUX ports is not minimized.
46 EXCAVATOR OPERATION 1-way or 2-way CIRCUIT SELECTION VALVE OPERATION A selection valve which selects 1-way or 2-way circuit of service port has been installed on the hydraulic tank. 1. When equipment which needs a 1-way circuit will be used, position the arrow, by using the selector lever, on the axis of the selection valve to the 1-way circuit position, to reduce the back pressure. 2.
EXCAVATOR OPERATION AUTO IDLE (AI) OPERATION 1. Throttle Potentiometer With this potentiometer the operator can adjust the engine speed when the Auto Idle control is activated. 2. Switch for Auto Idle (AI) Control With this switch the Auto Idle control is turned on or off. The Auto Idle control allows the engine speed to drop to idle speed when the control levers are left in neutral for longer than four seconds. If the control is activated, the engine speed rises immediately to the preset rpm.
48 TRANSPORTING THE EXCAVATOR ON A VEHICLE TRANSPORTING THE EXCAVATOR ON A VEHICLE B Transporting on a Truck To avoid serious injury or death: A No directional changes should be made when the excavator is on the ramp. Should a change of direction be necessary, drive off the ramp completely and make the turn. A When driving forwards or backwards onto the vehicle, or when swinging the upper body, make sure that neither the CAB or the gates of the vehicle will be damaged.
TRANSPORTING THE EXCAVATOR ON A VEHICLE 49 3. For additional safety, use blocks or supports under the ramps and the bed. (1) Chain (2) Block 4. Completely align the ramps and the tracks and then drive the excavator slowly up the ramps. After ensuring that the tracks are completely on the bed, swing the upper body around to the back of the vehicle. 5. Lower the dozer onto the bed. 6. Pull in the bucket and arm completely. Then lower the boom. 7.
50 LIFTING OF THE EXCAVATOR LIFTING OF THE EXCAVATOR To avoid serious injury or death: A The correct instructions for safe handling are described here. Read these instructions carefully before moving the machine. Make sure that the operating personnel read the operator's manual carefully. B Basics when Lifting with Cables or Straps 1. The lifting and crane operation is to be undertaken according to the safe operation guidelines described. 2.
LIFTING OF THE EXCAVATOR 2. Attaching the steel cables or straps. (1) Always hook the excavator at three points. (one on the boom and left and right of the dozer) (2) Always use a shackle on each lifting hole when attaching the cables or straps. (3) Keep the angle between the front and rear cables or straps within 51 . (1) Cable or strap (A) 55 or less A While lifting, carefully keep the machine well balanced with its center of gravity in mind.
52 MAINTENANCE MAINTENANCE MAINTENANCE INTERVALS No. Check points 1 Coolant 2 Fuel 3 4 5 check Hour meter indicator 50 100 200 250 300 350 400 450 Interval Ref.
MAINTENANCE No. Check points 1 Coolant 2 Fuel 3 Engine oil 4 Hydraulic oil Measures check Hour meter indicator 500 550 650 700 750 800 1000 Interval Ref.
54 MAINTENANCE C Air-conditioner No. Check points 1 Air filter 2 Air conditioner condenser 3 Air conditioner pipes and hoses 4 Refrigerant (gas) No. Check points 1 Air filter 2 Air conditioner condenser 3 Air conditioner pipes and hoses 4 Refrigerant (gas) Hour meter indicator Interval Ref. page clean every 200 hrs 69 *2 replace every 1000 hrs - *2 clean every 200 hrs 70 check every 1 year 75 replace every 2 years 76 service as required 78 Interval Ref.
MAINTENANCE OPENING AND CLOSING OF COVERS BOpening/Closing of the Engine Hood To avoid personal injury: A Do not open the engine hood with the engine running unless in an emergency. A Do not touch the exhaust muffler or the exhaust pipe; serious burns can occur. 55 BOpening/Closing of the Side Cover 1. Insert the starter key in its hole and turn it clockwise to unlock the side cover. Pull the catch, and hold up the side cover until the gas spring fixture stay gets locked. 2.
56 MAINTENANCE BWhere to store the Tool The tool box is located in front of the right side bonnet. (1) Grease gun (2) Grease receiver (1) Box for storage BWhere to store the Grease Gun 1. Open the side cover, and the grease gun storage spot will be found inside. (1) Side cover 2. After using the grease gun, secure it back to its fixture and close the side cover. If grease is collected in the grease receiver, wipe it clean with waste cloth or the like.
MAINTENANCE BWhere to keep Operator's Manual 57 DAILY CHECKS To avoid personal injury: A When operating, keep hands and body inside of the ROPS / FOPS protective envelope. A Do not touch the control levers and the pedals from outside the cab during the engine running. For your own safety and to assure the long life of your machine, a careful check should be made before each operation.
58 MAINTENANCE A Do not fill the recovery tank over the "FULL" marking. A Do not fill with dirty or salty water. 2. If necessary, open the cap and fill in fuel. BChecking Fuel Level To avoid personal injury: A Stop the engine and remove the key before fuelling. A Do not smoke while fuelling. A By temperatures over -5 , use No.2-D diesel fuel, when temperatures are under -5 , use No.1-D diesel fuel. A Make sure that the fuel tank is not run empty.
MAINTENANCE BChecking Hydraulic Oil Level To avoid personal injury: A Stop the engine and remove the key before checking the oil level. 59 2. Check the oil level as to whether it lies on the center of the gauge at normal temperature (10 to 30 ). 3. Enough oil is present when oil is at center mark. 4. Should the oil level be too low, loosen the oil filling plug gradually to release pressure in the tank, then fill up with oil at oil fill port.
60 MAINTENANCE BChecking Radiator and Oil Cooler To avoid personal injury; A Always stop the engine and remove the key before checking the radiator. A Wear eye protection when cleaning with compressed air. A Replace all water hoses every two years. A Inspect all water hoses daily. Have the excavator repaired immediately if any of the following defects are discovered. (Such defects may cause burns or injury. They may also cause engine failure or serious engine damage.
MAINTENANCE A Radiator and oil cooler fins and ribs must be clean in order to avoid overheating the engine and to allow free flow of air through the cooling elements. A Pressure of compressed air must be under 205 kPa (2.1 kgf.cm , 30 psi) BChecking Washer Liquid If the windows washer is switched on with the washer liquid tank empty, the motor may be damaged. Always keep the tank filled.
62 MAINTENANCE BGreasing Front Attachments (without Bucket Pin and Boom Swing Fulcrum) To avoid personal injury: A First lower all attachments on the ground then stop the engine and remove the key. A While greasing, take care not to step on the bucket teeth. A When doing excavation work in water, generously grease the following points. After ending work, grease again. Grease the marked grease nipples shown by arrows in the illustration below.
REGULAR CHECKS AND MAINTENANCE WORK 63 REGULAR CHECKS AND MAINTENANCE WORK BDraining Water Separator To avoid personal injury: A When operating, keep hands and body inside of the ROPS / FOPS protective envelope. A Do not touch the control levers and the pedals from outside the cab during the engine running. EVERY 50 SERVICE HOURS BDraining the Water from the Fuel Tank To avoid personal injury: A Before draining the water from the fuel tank, be sure to stop the engine and remove the key.
64 REGULAR CHECKS AND MAINTENANCE WORK BBattery To avoid the possibility of a battery explosion: For refillable type battery, follow the instructions below. A 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.
REGULAR CHECKS AND MAINTENANCE WORK BBattery Charging To avoid personal injury: A When the battery is being activated, hydrogen and oxygen gases in the battery are extremely explosive. Keep open sparks and flames away from the battery at all times, especially when charging the battery. A When charging battery, remove battery vent plugs. A When disconnecting the cable from the battery, start with the negative terminal first. When connecting the cable to the battery, start with the positive terminal first.
66 REGULAR CHECKS AND MAINTENANCE WORK EVERY 200 SERVICE HOURS Do all 50 and 100 hour servicing at the same time. BAdjusting V-belt Tension C Checking and adjustment of the fan belt tension 1. Press the fan belt down in the middle, with a force of approx. 68.6 N (7 kgf). The belt tension is correct if it deflects about 12 to 15 mm. If otherwise, loosen bolt and shift the alternator in the direction shown by the arrow. 2. Replace the fan belt if worn out, cracked or torn.
REGULAR CHECKS AND MAINTENANCE WORK BChecking Radiator Hoses and Clamps To avoid personal injury: A Wait long enough for the radiator coolant to cool down. 67 BInspection and Cleaning Air Filter Element Open the engine hood and remove the dust-cover. Take out only outer element, clean the element, case interior and reassemble. During reassembly, take care to install the dust-cover so that its TOP mark (arrow) faces upwards. Do not remove the inner element. Check the coolant hoses for proper connection.
68 REGULAR CHECKS AND MAINTENANCE WORK BAir Filter Maintenance To avoid personal injury: A Wear eye protection. BGreasing Swing Ball Bearing 1. Grease through the respective grease nipple. (at the central nipple) 2. Grease at each 90 (1.58 rad.) position of the swing frame. (1) Grease nipple The quickest and safest method of maintenance is the exchange of the paper cartridge. Furthermore there are different methods of cleaning the cartridge.
REGULAR CHECKS AND MAINTENANCE WORK BChecking Fuel Line and Intake Air Line 1. Check to see that all lines and hose clamps are tightened and not damaged. 2. If hoses and clamps are found worn or damaged, replace or repair them at once. 69 AIR CONDITIONER BCleaning Air Filter Open the cover and remove the filter cover, remove the air filter. (1) Air filter (1) Fuel lines (2) Clamp bands To avoid personal injury: A Wear eye protection.
70 REGULAR CHECKS AND MAINTENANCE WORK EVERY 250 SERVICE HOURS Do all 50 hour servicing at the same time. BChanging Engine Oil (First Engine Oil Change after 50 Service Hours) To avoid personal injury: A First stop the engine then remove the key and wait long enough for the oil to cool down. (1) Filter (A) "AIR-CONDITIONER AIRFLOW" 1. Remove the drain plug on the underside of the engine and drain all oil. 2. Re-tighten the drain plug. A Pressure of compressed air must be under 205 kPa (2.
REGULAR CHECKS AND MAINTENANCE WORK 4. Let the engine idle for approx. 5 min. Check the engine oil level. To check the engine oil level, insert the engine oil dipstick completely into the respective port opening and pull out again. If the oil level lies between both markings, no oil must be added. 71 EVERY 500 SERVICE HOURS Do all 50, 100 and 250 hour servicing at the same time.
72 REGULAR CHECKS AND MAINTENANCE WORK BReplacing Fuel Filter Cartridge To avoid personal injury: A Keep fire away. EVERY 1000 SERVICE HOURS Do all 50, 100, 200, 250 and 500 hour servicing at the same time. BReplacing the Hydraulic Pilot Filter Element 1. Remove the filter with the filter wrench. 2. Apply a light film of fuel to the seal of the new filter and turn in tightly by hand. 3. Open the cock of the fuel filter again. 1. 2. 3. 4. 5. 6. 7. 8.
REGULAR CHECKS AND MAINTENANCE WORK 73 A Always check the oil level when replacing the filter element. BHydraulic Oil Change (Including Replacing of the Suction Filter in the Hydraulic Tank) To avoid personal injury: A Wait long enough for the hydraulic fluid to cool down. Then begin with the change of the hydraulic fluid. (1) Head cover (2) Element (3) O-ring (4) Case 1. Park the excavator on a firm, flat and level surface. Lower the attachments and dozer blade to the ground and stop the engine.
74 REGULAR CHECKS AND MAINTENANCE WORK 4. Retighten the drain plug. BHydraulic Oil Check with Hydraulic Hammers (1) Oil filling plug (2) Pin (3) Suction filter (4) Drain plug 5. Fill oil through the oil filling opening on the top side of the tank. 6. Let the engine run and operate the boom, arm, bucket and boom swing device. Then bring the boom to the highest position, pull the arm, bucket inward and boom swing left end. 7. Fill oil again up to the center of the gauge.
REGULAR CHECKS AND MAINTENANCE WORK 75 EVERY 1000 SERVICE HOURS OR ONCE A YEAR ANNUAL SERVICING BReplacing Air Filter Element Check the terminals periodically for proper connections. Loose wiring or damaged cables can cause improper functioning or short circuiting of the electrical system. Check wiring and replace damaged components immediately. If a fuse blows out soon after having been replaced, contact your nearest KUBOTA dealer. Never use a fuse other than specified.
76 REGULAR CHECKS AND MAINTENANCE WORK BIENNIAL SERVICING To avoid personal injury: A Do not loosen the radiator cap before the radiator has cooled down sufficiently. Only loosen the cap after allowing enough time for the pressure in the system to be reduced. Thereafter, one can remove the cap completely. BReplacing Air-Conditioner Pipes and Hoses To avoid personal injury: A Do not touch the coolant hoses or the heater with your hand. You may get burned.
REGULAR CHECKS AND MAINTENANCE WORK 77 Stop the engine, then remove the key and wait until it has cooled down completely. 1. Open the drain plug on the bottom of the radiator and drain coolant completely. Should a recovery tank be equipped, disconnect the line from the tank floor and then open the drain cock. 2. To clean, rinse the radiator with water. 3. Close the drain plug, and fill the radiator and the recovery tank with coolant fluid. Let the engine idle for about 5 min.
78 REGULAR CHECKS AND MAINTENANCE WORK 2. Look into the sight glass to see if the refrigerant is flowing through its circuit. BReplacing Intake Air line Replace the hoses and clamps, if necessary. (See "Checking Fuel and Intake Air Line" in "EVERY 200 SERVICE HOURS") (1) Sight glass (1) Hoses (2) Hose clamps SERVICING AS REQUIRED BChecking Amount of Refrigerant (gas) To avoid personal injury: A Liquid contact with eyes or skin may cause frostbite. A In the event of a leakage, wear safety goggles.
OTHER ADJUSTMENTS AND REPLACEMENTS 79 OTHER ADJUSTMENTS AND REPLACEMENTS PURGING OF THE FUEL SYSTEM 1. Fill up the excavator with fuel. 2. Turn the starter key to the position "RUN". 3. The air in the fuel system will automatically be purged within one minute. After adjustment is completed: Using the socket wrench, tighten the grease nipple. Tightening torque must be between 98 to 108 N-m. A If the tracks are too tight, wear is increased.
80 OTHER ADJUSTMENTS AND REPLACEMENTS To avoid serious injury or death: A Do not work under the machine in this condition. A For your safety do not rely on hydraulically supported devices, they may leak down and suddenly drop or be accidentally lowered. To avoid personal injury or death: A When lifting the machine itself with an attachment, place a safety block or safety post to prevent the machine from turning over. Keep the lock lever for attachment control in the "LOCK" position.
OTHER ADJUSTMENTS AND REPLACEMENTS CHANGING THE BUCKET To avoid personal injury: A There are two people required to replace the bucket. One person operates the excavator, and the other one mounts the bucket. The person who mounts the bucket must command-guide the movements of the front end attachments. The operator should move the front end attachments only according to the commands of the person who mounts the bucket. Continuous visibility between both persons is indispensable.
82 OTHER ADJUSTMENTS AND REPLACEMENTS BFuse Capacities and Circuits [CAB (Air-conditioner type)] [Canopy] 1 Cab Light 13 AI Motor 2 Work Light 14 Horn SW 1 Cab Light 10 Fuel Pump 3 Meter (+B) 15 ECU (+B) 2 Work Light 11 Lever Lock 4 Horn 16 Beacon 3 Meter (+B) 12 Starter 5 Room Light 17 A/C Controller (+B) 4 Horn 13 AI Motor 6 Alternator 18 Engine Stop 5 Room Light 14 Horn SW 7 Cab Relay 19 Blower Motor 6 Alternator 15 ECU (+B) 8 Meter (AC) 20 Elect
OTHER ADJUSTMENTS AND REPLACEMENTS BAuxiliary Electric Max power is less than 110 W including the equipped light 55W. If you need another auxiliary electric, contact your KUBOTA dealer for details. 83 C Replacement procedure [80 Amp. Slow-blow fuse] 1. Disconnect the negative cord of the battery. 2. Remove the slow blow fuse case. (1) Slow blow fuse case (1) Auxiliary Electric 3. Open the slow blow fuse case cap and cover then remove the bolts and draw out the slow blow fuse (B).
84 TROUBLESHOOTING TROUBLESHOOTING If the excavator does not show the desired performance, or when trouble arises, refer to the table below and undertake appropriate measures. Trouble Starting difficulties Insufficient engine power Engine Engine suddenly stops. Abnormal exhaust gas color Water temperature in red zone (Overheating) Cause Countermeasure Lock levers in "UNLOCK" position * Bring lock lever into "LOCK" position. Fuel is too viscous. * Check fuel tank and filter.
TROUBLESHOOTING Trouble Engine Hydraulic System Water temperature in red zone (Overheating) Cause Cylinder head gasket is damaged (Coolant loss). * Replace. Engine oil level too low * Fill to prescribed level. Maladjustment of fuel injection * Readjust ignition timing. Use of poor fuel * Use prescribed fuel. Boom, arm, Hydraulic oil level too low bucket, drive, swing and dozer Leakages of hoses and / power is too low. or joints Swing motor and front attachment does not work.
86 OPERATION UNDER COLD WEATHER CONDITIONS OPERATION UNDER COLD WEATHER CONDITIONS PREPARATION FOR OPERATION IN COLD WEATHER 1. Replace engine oil and hydraulic oil with those of viscosities suitable for cold weather. 2. In cold weather, battery power drops, and the battery fluid may freeze if the battery is not sufficiently charged. To prevent the battery fluid from freezing, be sure to keep the battery charged at least 75% or more of its capacity after operation.
LONG STORAGE 87 LONG STORAGE To avoid personal injury: A Do not clean the excavator with the engine running. A To avoid the danger of exhaust fume poisoning, do not operate the engine in a closed building without proper ventilation. A When storing, remove the key from the starter switch to avoid unauthorized persons from operating the excavator and getting injured. A Bring the excavator on a firm, flat, and level surface. Lower the attachments and dozer blade on the ground.
88 LONG STORAGE Periodic replacement of important component parts To ensure safety in operation, you are strongly requested to inspect and service the machine at regular intervals. For added safety, ask your KUBOTA dealer to replace the following important component parts. These parts are prone to degradation in material or subject to wear and tear with time. It is difficult to judge how much they have been affected at regular inspection.
RECOMMENDED OILS RECOMMENDED OILS 1. Before delivery the hydraulic oil used was Shell Tellus S2M46. 2. Use engine oil API service classification CJ-4 . 3. Use SAE 90 (API, GL-4/GL-5) as drive unit oil for all seasons.
90 APPENDICES APPENDICES MAIN DIMENSIONS mm U48-4 (A) 815 (B) 625 (C) 1960 (D) 5440 (E) 3770 (F) 3380 (G) 2670 (H) 990 U48-4 (K) 440 (L) 410 (M) 2550 (N) 1960 (O) 5710 (P) 5330 (Q) 1830 (R) 2390 A Above dimensions are based on the machine with KUBOTA original bucket. A Above dimensions are based on the machine with rubber track. A Specifications subject to change without notice.
LIFTING CAPACITY 91 LIFTING CAPACITY 1. The lifting capacities are based on ISO 10567 and do not exceed 75% of the static tilt load of the machine or 87% of the hydraulic lifting capacity of the machine. 2. The strokes are as follows. (1) The load point corresponds to the front bolt part of the arm. (2) The machine positions are (i) over - front (Blade down), (ii) over - front (Blade up), and (iii) over - side. (3) The operating cylinder is the boom cylinder. 3.
92 LIFTING CAPACITY
LIFTING CAPACITY 93
94 LIFTING CAPACITY
LIFTING CAPACITY 95
96 LIST OF SCREENS LIST OF SCREENS LIST OF NORMAL SCREENS No. Message Problem or failure (What happened) Machine behavior (Provisional measure) Correction Glow screen 1 Wait until the glow mark This screen indicates that disappears. Then get the the glow lamp is on. engine started. - This screen shows the normal status. (Hour meter) - - This screen shows the normal status.
LIST OF SCREENS NAVIGATION LIST OF SCREENS 97 If an error occurs with the machine, one of the following messages appears in the LCD display. In case of trouble, immediately contact your local dealer for inspection and repair. While the ( ) (information mark) appears onscreen, press the information switch, and detailed information will be displayed. Notify your local dealer of this and other information. No.
98 No. LIST OF SCREENS Message Not equipped with overload warning function 7 Problem or failure (What happened) Machine behavior (Provisional measure) Correction This message appears if the overload warning switch is pressed on machines not equipped with overload warning system. - - Fuel is running out. - Out of fuel 8 The fuel sensor system is in trouble. The fuel level indicator does not appear on the meter.Press the display selector switch, and the normal display is switched back.
LIST OF SCREENS No. Message Problem or failure (What happened) Machine behavior (Provisional measure) Correction The engine automatically reduces rpm's avoid an overheat. Leave the engine idling until this warning disappears. Do not stop the engine because the coolant temperature will increase sharply and may boil and gush out. Be sure to cool down the engine without stopping it. Refill the radiator with coolant by its boiled-over amount. Unclog the radiator and other components before use again.
100 LIST OF SCREENS No. Message Problem or failure (What happened) Machine behavior (Provisional measure) The sensor's or switch's 12V line is short-circuited. The majority of systems fail. * The engine may start and the machine may move. But do not try any jobs. (Just move the machine to a safe place.) Immediately contact your local dealer. The communication (CAN) system is in trouble. Some meter readings may be erroneous or some switches may malfunction.