PDF Operation & Maintenance Manual Komatsu PC300 PC300LC PC350 PC350LC Hydraulic Excavator - 2 MB

Master the operation and daily maintenance of your Komatsu Galeo series hydraulic excavator.

This manual covers the PC300, PC300LC, PC350, and PC350LC models, providing crucial safety information, control layouts, and service schedules.

Following these guidelines will ensure maximum productivity and extend the life of your machine.

It is an essential read for every operator and site manager.

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--- Page 3 ---
CONTENTS                                                                                                                                          FOREWORD


CONTENTS

FOREWORD
FOREWORD ......................................................................................................................................................... 1-2

SAFETY INFORMATION...................................................................................................................................... 1-5

INTRODUCTION................................................................................................................................................... 1-7
         DIRECTIONS OF MACHINE ...................................................................................................................... 1-7
         BREAKING-IN OPERATION ...................................................................................................................... 1-7

PRODUCT INFORMATION .................................................................................................................................. 1-8
         PRODUCT IDENTIFICATION NUMBER (PIN), MACHINE SERIAL NO. PLATE....................................... 1-8
         ENGINE SERIAL NUMBER PLATE AND ITS LOCATION ......................................................................... 1-8
         SERVICE METER LOCATION ................................................................................................................... 1-9
         YOUR MACHINE SERIAL NUMBERS AND DISTRIBUTOR ..................................................................... 1-9


SAFETY
SAFETY INFORMATION...................................................................................................................................... 2-2

POSITION FOR ATTACHING SAFETY LABELS................................................................................................ 2-4
         POSITION FOR ATTACHING SAFETY LABELS....................................................................................... 2-4
         SAFETY LABELS ....................................................................................................................................... 2-5

SAFETY INFORMATION.................................................................................................................................... 2-10

SAFETY MACHINE OPERATION...................................................................................................................... 2-19
         STARTING ENGINE ................................................................................................................................. 2-19
         OPERATION............................................................................................................................................. 2-21
         TRANSPORTATION................................................................................................................................. 2-27
         BATTERY ................................................................................................................................................. 2-28
         TOWING ................................................................................................................................................... 2-30
         LIFTING OBJECTS WITH BUCKET ......................................................................................................... 2-31

SAFETY MAINTENANCE INFORMATION ........................................................................................................ 2-32


OPERATION
GENERAL VIEW .................................................................................................................................................. 3-2
         GENERAL VIEW OF MACHINE ................................................................................................................. 3-2
         GENERAL VIEW CONTROLS AND GAUGES........................................................................................... 3-3

EXPLANATION OF COMPONENTS.................................................................................................................... 3-4
         MACHINE MONITOR ................................................................................................................................. 3-4
         BASIC CHECK ITEMS................................................................................................................................ 3-5


1-10

--- Page 4 ---
POSITION FOR ATTACHING SAFETY LABELS                     SAFETY


(4) Warnings for high voltage (09801-03001)


(5) Warnings when opening front window (09839-03000)


(6) Warnings when stowing front window (09803-03000)


(7) Precautions for high-temperature oil (09653-03001)


2-6

--- Page 5 ---
SAFETY INFORMATION                                                                                       SAFETY


ATTACHMENT COMBINATIONS
Depending on the type or combination of work equipment, there is a hazard that the work equipment may hit the
cab or other parts of the machine. Before using unfamiliar work equipment, check if there is any hazard of interfer-
ence, and operate with caution.


CAB WIDOW GLASSES
●   If the cab glass on the work equipment side is broken, there is a hazard that the work equipment may contact
    the operator's body directly. Stop operation immediately and replace the glass.

●   Use water to clean roof windows made of organic glass (polycarbonate); do not use any organic solvent. If
    benzene, toluene, methanol, or other organic solvents are used, there will be chemical reactions such as the
    glass dissolving or decomposing, and the polycarbonate will deteriorate.


UNAUTHORIZED MODIFICATIONS
Any modification mode without authorization from Komatsu can create hazards. Before making a modification,
consult your Komatsu distributor.

●   Komatsu will not be responsible for any injuries, accidents, or product failures resulting from modifications
    made without authorization from Komatsu.


SAFETY AT JOBSITE
Before starting operations, thoroughly check the area for any unusual conditions that could be dangerous.

●   When carrying out operations near combustable materials such as thatched roofs, dry leaves or dry grass,
    there is a hazard of fire, so be careful when operating.

●   Check the terrain and condition of the ground at the worksite, and determine the safest method of operation.
    Do not carry out operations at places where there is a hazard of landslides or falling rocks.

●   If water lines, gas lines, or high-voltage electrical lines may
    be buried under the worksite, contact each utility and iden-
    tify their locations. Be careful not to sever or damage any
    of these lines.

●   Take action to prevent unauthorized people from approach-
    ing the jobsite.
    When working on public roads, position flagmen and erect
    barriers to ensure the safety of passing traffic and pedestri-
    ans.

●   When traveling or operating in shallow water or on soft
    ground, check the shape and condition of the bedrock, and
    the depth and speed of flow of the water before starting
    operations.


2-16

--- Page 6 ---
SAFETY MACHINE OPERATION                                                                                SAFETY


OPERATIONS ON SNOW
●   Snow-covered or frozen surfaces are slippery, so be extremely careful when traveling or operating the
    machine, and do not operate the levers suddenly. Even a slight slope may cause the machine to slip, so be
    particularly careful when working on slopes.

●   With frozen ground surfaces, the ground becomes soft when the temperature rises, and this may cause the
    machine to tip over.

●   If the machine enters deep snow, there is a hazard that it may tip over or become buried in the snow. Be care-
    ful not to leave the road shoulder or to get trapped in a snow drift.

●   When clearing snow, the road shoulder and objects placed beside the road are buried in the snow and cannot
    be seen. There is a hazard of the machine tipping over or hitting covered objects, so always carry out opera-
    tions carefully.


PARKING MACHINE
●   Park the machine on firm, level ground.

●   Select a place where there is no hazard of falling rocks or
    landslides, or of flooding if the land is low.

●   Lower the work equipment completely to the ground.


●   When leaving the machine, set lock lever (1) to the LOCK
    position, then stop the engine.

●   Always close the operator's cab door, and use the key to
    lock all the equipment in order to prevent any unauthorized
    person from moving the machine. Always remove the key,
    take it with you, and leave it in the specified place.


●   If it is necessary to park the machine on a slope, always do
    as follows.

    ●   Set the bucket on the downhill side, then dig it into the
        ground.

    ●   Put blocks under the tracks to prevent the machine
        from moving.


2-26

--- Page 7 ---
SAFETY MAINTENANCE INFORMATION                                                                             SAFETY


NOISE
If the noise from the machine is too loud, it may cause temporary or permanent hearing problems.

When carrying out maintenance of the engine and you are exposed to noise for long periods of time, wear ear cov-
ers or ear plugs while working.


WHEN USING HAMMER
When using a hammer, pins may fly out or metal particles may
be scattered. This may lead to serious injury. Always do as fol-
lows.

●   If hard metal parts such as pins, bucket teeth, cutting
    edges, or bearings are hit with a hammer, there is a hazard
    that pieces might be scattered and cause injury. Always
    wear safety goggles and gloves.

●   When hitting pins or bucket teeth, there is a hazard that
    broken pieces might be sent flying and injure people in the
    surrounding area. Always check that there is no one in the
    surrounding area.

●   If pins are hit with strong force, there is a hazard that the pin may fly out and injure people in the surrounding
    area.


WELDING WORKS
Welding operations must always be carried out by a qualified welder and in a place equipped with a proper equip-
ment. There is a hazard of fire or electrocution when carrying out welding, so never allow any unqualified person-
nel to carry out welding.


REMOVING BATTERY TERMINALS
When repairing the electrical system or when carrying out electrical welding, remove the negative (-) terminal of
the battery to prevent the flow of current.


2-36

--- Page 8 ---
OPERATION                                                                            EXPLANATION OF COMPONENTS


CAUTION ITEMS

                                                        CAUTION
If the warning monitor flashes or lights up, carry out inspection and maintenance of the appropriate point
as soon as possible.
If the problem is not corrected, it may lead to failure of the machine.


These are items which need to be observed when the engine is running. If any abnormality occurs, the item need-
ing immediate repair is displayed. If there is any abnormality, the abnormal location on the monitor will flash or light
up.


(1)   Charge level monitor                                (3)   Air cleaner clogging monitor
(2)   Fuel level monitor


                                                                                                                    3-7

--- Page 9 ---
OPERATION                                                                        EXPLANATION OF COMPONENTS


SWITCHES


(1)   Starting switch                                   (8) Horn switch
(2)   Fuel control dial                                 (9) Knob switch
(3)   Cigarette lighter                                 (10) Room lamp switch
(4)   Swing lock switch                                 (11) Emergency pump drive switch
(5)   Lamp switch                                       (12) Emergency fuel solenoid drive switch
(6)   Alarm buzzer stop switch                          (13) Swing brake cancel switch
(7)   Machine push-up switch                            (14) Rotating lamp switch (if equipped)

STARTING SWITCH
This switch (1) is used to start or stop the engine.
OFF position
The key can be inserted or withdrawn. The switches for the
electric system except the room lamp, are all turned off and the
engine is stopped.
ON position
Electric current flows in the charging and lamp circuits. Keep
the starting switch key at the ON position while the engine is
running.
START position
This is the engine-start position. Keep the key at this position
during cranking. Immediately after starting the engine, release
the key. It will automatically return to the ON position.
HEAT (preheat) position
When starting the engine in winter, set the key to this position. Whenthe key is set to the HEAT position, the pre-
heating monitor lightsup. Keep the key at this position until the monitor lamp flashes.Immediately after the pre-
heating monitor flashes, release the key.The key automatically returns to the OFF position. Then, start the engine
by turning the key to the START position.


                                                                                                              3-17

--- Page 10 ---
OPERATION                                                                         EXPLANATION OF COMPONENTS


FRONT WINDOW

                                  WARNING
●        Before opening or closing the front window, bottom
         window, or door, always set lock lever (1) to the LOCK
         position.
         If the control levers are touched by mistake, it may
         lead to serious personal injury or death.

●        Before opening or closing the front window of the cab,
         lower the work equipment to the ground at a horizon-
         tal place, then stop the engine.

●        When opening the front window, hold the grips
         securely with both hands, pull up, and do not release
         until the window fits on the automatic lock catch.

●        When closing the front window, there is danger of the
         window coming down under its own weight, so hold
         the grips securely with both hands and close the win-
         dow.


It is possible to store (pull up) the front window (top) in the roof
of the operator's compartment.


When opening
    1.    Move the machine to a horizontal place, lower the work equipment completely to the ground, then stop the
          engine.

    2.    Set the lock lever securely to the LOCK position.

    3.    Check that the wiper blade is stored in the right stay.


                                                                                                              3-27

--- Page 11 ---
OPERATION                                                        EXPLANATION OF COMPONENTS


VENT SELECTOR SWITCH
This switch (4) is used to select the vents.

●   When switch (4) is pressed, the display on monitor display
    (7) switches and air blows out from the vents displayed.

●   During automatic operation, the vents are automatically
    selected.


(A): Rear vents (4 places)
(B1): Face vent (1 place)
(B2): Front window vent (1 place)
(C): Foot vent (1 place)
(D): Front window vent (1 place)


                                                                                      3-37

--- Page 12 ---
OPERATION                                                                             EXPLANATION OF COMPONENTS


OTHER FUNCTIONS

SELF-DIAGNOSTIC FUNCTION
It is possible to carry out troubleshooting of the various sensors
and equipment used on the air conditioner.

    1.    Turn the starting switch key to the ON (B) position.

    2.    Press OFF switch (1). The temperature setting and air
          flow display on the liquid crystal display portion go out
          and operation stops.

    3.    If the "Β›" and "š" parts of temperature setting switch (3)
          are kept pressed at the same time for at least 3 seconds,
          the troubleshooting mode is displayed on the liquid crys-
          tal display portion.

<Monitor display and failure mode>

    Display                         Failure mode

         E--      No failure

         E11      Disconnection in recirculated air sensor

         E12      Short circuit in recirculated air sensor

         E15      Disconnection in water temperature sensor

         E16      Short circuit in water temperature sensor

         E18      Short circuit in sunlight sensor

         E43      Abnormality in vent damper

         E44      Abnormality in air mix damper

         E45      Abnormality in FRESH/RECIRC air damper


●        When more than one failure is detected, press the "Β›" or "š" portion of temperature setting switch (3) to dis-
         play the failures in turn.

●        After completing the troubleshooting, press OFF switch (1) again to return to the normal display.

If any abnormality is detected by the self-diagnostic function, ask your Komatsu distributor to carry out inspection
and repair.


                                                                                                                  3-47

--- Page 13 ---
OPERATION                                                         EXPLANATION OF COMPONENTS


CONTROLLER (COMPUTER)
An engine throttle and pump controller is installed.

NOTICE
●  Be careful not to get water, mud, or juice on the con-
   troller. This will cause failure.
●  If any abnormality occurs in the controller, do not dis-
   assemble it yourself. Contact your Komatsu distribu-
   tor for repairs.


TOOLBOX
Keep the tools in this toolbox.


NOTICE
Do not put large tools into the toolbox if they prevent the
cover from closing. There is danger that the radiator fins
may be damaged. Put large tools in the utility space. The
utility space is inside the front door on the left side of the
machine.


GREASE GUN HOLDER
This is inside the front door on the right side of the machine.
When not using the grease gun, fit it in this holder.


                                                                                       3-57

--- Page 14 ---
OPERATION                                                                      MACHINE OPERATIONS AND CONTROLS


ADJUST BEFORE OPERATION

                                WARNING
When adjusting the position of the operator's seat, always
set lock lever (1) to the LOCK position to prevent any
movement of the machine if the control levers are
touched by mistake.


A: Fore-and-aft adjustment
Pull lever (1) up, set the seat to the desired position, then
release the lever.
Fore-and-aft adjustment: 160 mm (6.3 in) (16 stages)

B: Adjusting reclining
NOTICE
The seat can be reclined to a large angle when the seat is
pushed fully forward, but the reclining angle is reduced
when the seat is moved back, so when moving the seat to
the rear, return the seat back to its original position.

Pull lever (2) and set the seat back to a position which is com-
fortable for operation, then release the lever.

Sit with your back against the seat back when adjusting. If your
back is not touching the seat back, the seat back may suddenly
move forward.

C: Adjusting seat tilt
●   Forward tilt
Push lever (3) up to adjust the angle of the front of the seat. (4
stages)
●   To raise the angle at the front of the seat, keep the lever pushed up and apply your weight to the rear of the
    seat.

●   To lower the angle at the front of the seat, keep the lever pushed up and apply your weight to the front of the
    seat.


●   Rear tilt
Pull lever (4) up to adjust the angle of the rear of the seat. (4stages)
●   To raise the angle at the rear of the seat,keep the lever (3) pulled up and stand up slightly to remove your
    weight from the seat.

●   To lower the angle at the rear of the seat,keep the lever (3) pulled up and apply your weight to the rear of the
    seat.

Amount of tilt: Up 13Β°, down 13Β°

●     Adjusting seat height
It is possible to move the seat up or down by combining adjustments 1 and 2.
After setting the forward tilt or rear tilt to the desired height, operate the opposite part to set the seat horizontal then
secure in position.
Height adjustment: 60 mm (2.4 in)


                                                                                                                       3-67

--- Page 15 ---
OPERATION                                                                  MACHINE OPERATIONS AND CONTROLS


AFTER STARTING ENGINE

                                                         WARNING
●        Emergency stop
         If there has been any abnormal actuation or trouble, turn the starting switch key to the OFF position.
●        If the work equipment is operated without warming the machine up sufficiently, the response of the
         work equipment to the movement of the control lever will be slow, and the work equipment may not
         move as the operator desires, so always carry out the warming-up operation. Particularly in cold
         areas, be sure to carry out the warming-up operation fully.


WARMING-UP OPERATION
NOTICE
●  When the hydraulic oil is at a low temperature, do not
   carry out operations or move the levers suddenly.
   Always carry out the warming-up operation. This will
   help to extend the machine life.
●  Do not suddenly accelerate the engine before the
   warming-up operation is completed.
   Do not run the engine at low idling or high idling con-
   tinuously for more than 20 minutes. This will cause
   leakage of oil from the turbocharger oil supply piping.
   If it is necessary to run the engine at idling, apply a
   load from time to time or run the engine at a mid-range
   speed.

REMARK
●  If the engine water temperature is above 30ΒΊC, to protect the turbocharger, the engine speed does not rise for
   2 seconds after starting, even if the fuel control dial is turned.
●  If the hydraulic oil temperature is low, the hydraulic oil temperature monitor display will be white.

After starting the engine, do not immediately start operations. First, carry out the following operations and checks.

    1.    Turn fuel control dial (2) to the center position between
          LOW IDLING and HIGH IDLING and run the engine at
          medium speed for about 5 minutes with no load.


    2.    Move lock lever (1) slowly, set it securely to the FREE
          position, then raise the bucket from the ground surface.


                                                                                                                 3-77

--- Page 16 ---
OPERATION                                                            MACHINE OPERATIONS AND CONTROLS


STEERING THE MACHINE

Steering

                                                       WARNING
Before operating the travel levers, check the position of the sprocket. If the sprocket is at the front, the
operation of the travel levers is reversed.


Use the travel levers to change direction.

Avoid sudden changes of direction as far as possible. In partic-
ular, when carrying out counter-rotation (spin turn), stop the
machine first before turning.

Operate two travel levers (1) as follows.


Steering the Machine when Stopped
When turning to the left:

Push the right travel lever forward to turn to the left when trav-
eling forward; and pull it back to turn left when traveling in
reverse.

REMARK
When turning to the right, operate the left travel lever in the
same way.


                                                                                                        3-87

--- Page 17 ---
OPERATION                                                                    MACHINE OPERATIONS AND CONTROLS


    2.    When traveling up a steep hill of more than 15ΒΊ, set the
          work equipment to the posture shown in the diagram on
          the right.


●        When traveling up steep slopes, to ensure the balance,
         extend the work equipment to the front, keep it raised 20 -
         30cm (10 - 20in) from the ground surface, and travel at low
         speed.


TRAVELING DOWNHILL
To brake the machine during downhill runs, put the travel lever in the neutral position. This will cause the brake to
be automatically applied.


ENGINE STOPPED ON SLOPE
If the engine stops when traveling uphill, move the all levers to the neutral position, then start the engine again.


PRECAUTIONS ON SLOPES
●        If the engine stops when the machine is on a slope, never use the left work equipment control lever to carry
         out swing operations. The upper structure will swing under its own weight.

●        Be extremely careful when opening or closing the door on slopes. The weight of the door may cause the door
         to open or close suddenly.
         Always set the door so that it is firmly locked in position.


                                                                                                                  3-97

--- Page 18 ---
OPERATION                                                         MACHINE OPERATIONS AND CONTROLS


LOCKING
Always lock the following places.

(1) Door of operator’s cab
    Always remember to close the window.
(2) Fuel tank filler port
(3) Engine hood
(4) Battery box cover
(5) Left side door of the machine
(6) Right side door of the machine
(7) Battery box side cover
    (only machines equipped with fuel supply pump)
(8) Hydraulic tank filler port
REMARK
Use the starting switch key to open and close all these places.


                                                                                             3-107

--- Page 19 ---
OPERATION                                                                                         TRANSPORTATION


LIFTING MACHINE

                                                          WARNING
●        The operator carrying out the lifting operation using a crane must be a properly qualified crane opera-
         tor.
●        Never raise the machine with any worker on it.
●        Always make sure that the wire rope is of ample strength for the weight of this machine.
●        When lifting, keep the machine horizontal.
●        When carrying out lifting operations, set the lock lever to the LOCK position to prevent the machine
         from moving unexpectedly.
●        Never enter the area under or around a raised machine.
Never try to lift the machine in any posture other than the posture given in the procedure below or using
lifting equipment other than in the procedure below.
There is a hazard that the machine may lose its balance.


NOTICE
The lifting procedure applies to machines with standard specifications.
The method of lifting differs according to attachments and options actually installed on the machine. For
the proper lifting procedures, contact your Komatsu distributor.

For details of the weight, see "SPECIFICATIONS (PAGE 5-2)".

When lifting the machine, carry out the operation on flat ground as follows.

    1.    Start the engine, then the swing the upper structure so that the work equipment will be on the side of
          sprocket (1).

    2.    Extend the bucket cylinder and arm cylinder fully, then
          lower the work equipment to the ground as shown in the
          diagram on the right using the boom cylinder.


    3.    Set the lock lever securely to the LOCK position (L).


    4.    Stop the engine, check that there is nothing around the operator's compartment, then get off the machine.
          Close the cab door and front glass securely.


                                                                                                                3-117

--- Page 21 ---
OPERATION                                                       TROUBLESHOOTING


DISCHARGED BATTERY

                            WARNING
●   It is dangerous to charge the battery while it is still
    mounted on the machine. Always remove the battery
    before charging it.

●   When checking or handling the battery, stop the
    engine and turn the starting switch key to the OFF
    position.

●   The battery generates hydrogen gas, so there is a haz-
    ard of explosion.
    Do not bring lighted cigarettes near the battery, or do
    anything that will cause sparks.

●   Battery electrolyte is dilute sulphuric acid, and it will
    attack your clothes and skin. If it gets on your clothes
    or on your skin, wash it immediately off with large
    amounts of water. If it gets in your eyes, wash it out
    with fresh water, and consult a doctor.

●   When handling batteries, always wear protective gog-
    gles and rubber gloves.

●   When removing the battery, first disconnect the cable
    from the ground (normally the negative (-) terminal).
    When installing, install the positive (+) terminal first.
    If a tool touches the positive terminal and the chassis,
    there is danger that it will cause a spark, so be
    extremely careful.

●   If the terminals are loose, there is danger that the
    defective contact may generate sparks that will cause
    an explosion.

●   When installing the terminals, install them tightly.
    When removing or installing the terminals, check
    which is the positive (+) terminal and which is the neg-
    ative (-) terminal.

●   Green rust around the terminals is a cause of self-dis-
    charge of the battery. Polish the terminals with sand-
    paper. After removing the rust, coat the terminals
    thinly with grease before installing.


                                                                           3-127

--- Page 22 ---
MAINTENANCE INFORMATION                                                                              MAINTENANCE


MAINTENANCE INFORMATION
Do not carry out any inspection and maintenance operation that is not found in this manual.


SERVICE METER READING
Check the service meter reading every day to see if the time has come for any necessary maintenance to be car-
ried out.


KOMATSU GENUINE REPLACEMENT PARTS
Use Komatsu genuine parts specified in the Parts Book as replacement parts.


KOMATSU GENUINE LUBRICANTS
Use Komatsu genuine oils and grease. Choose oils and grease with proper viscosities specified for ambient tem-
perature.


WINDSHIELD WASHER FLUID
Use automobile windshield washer fluid, and be sure not to let any dirt get into it.


FRESH AND CLEAN LUBRICANTS
Use clean oil and grease. Also, keep the containers of the oil and grease clean. Keep foreign materials away from
oil and grease.


CHECK DRAINED OIL AND USED FILTER
After oil is changed or filters are replaced, check the old oil and filters for metal particles and foreign materials. If
large quantities of metal particles or foreign materials are found, always report to the person in charge, and carry
out suitable action.


FUEL STRAINER
If your machine is equipped with a fuel strainer, do not remove it while fueling.


WELDING INSTRUCTIONS
●     Turn off the engine starting switch.

●     Do not apply more than 200V continuously.

●     Connect grounding cable within 1m (3.3 ft) from the area to be welded. If grounding cable is connected near
      instruments, connectors, etc., the instruments may have troubles.

●     Avoid seals or bearings from being between the area to be welded and the position of grounding point.

●     Do not use the area around the work equipment pins or the hydraulic cylinders as the grounding point.


4-2

--- Page 23 ---
RECOMMENDED FUEL, COOLANT AND LUBRICANTS                                                             MAINTENANCE


RECOMMENDED FUEL, COOLANT AND
LUBRICANTS
●   Komatsu genuine oils are adjusted to maintain the reliability and durability of Komatsu construction equipment
    and components.

    In order to keep your machine in the best conditioner for long periods of time, it is essential to follow the
    instructions in this Operation and Maintenance Manual.

●   Failure to follow these recommendations may result in shortened life or excess wear of the engine, power
    train, cooling system, and/or other components.

●   Commercially available lubricant additives may be good for the machine, but they may also cause harm.

    Komatsu does not recommend any commercially available lubricant additive.

●   Use the oil recommended according to the ambient temperature in the chart below.

●   Specified capacity means the total amount of oil including the oil in the tank and the piping. Refill capacity
    means the amount of oil needed to refill the system during inspection and maintenance.

●   When starting the engine in temperatures below 0Β°C (32Β°F), be sure to use the recommended multi-grade oil,
    even if the ambient temperature may become higher during the course of the day.

●   If the machine is operated at a temperature below -20Β°C (-4Β°F), a separate device is needed, so consult your
    Komatsu distributor.

●   When the fuel sulfur content is less than 0.5%, change the engine oil according to the period inspection table
    given in this Operation and Maintenance Manual.

    If the fuel sulfur content is more than 0.5%, change the oil according to the following table.

       Fuel sulfur content        Engine oil change interval

          0.5 to 1.0%                1/2 of regular interval

          Above 1.0%                 1/4 of regular interval


4-12

--- Page 24 ---
MAINTENANCE PROCEDURE                                                                          MAINTENANCE


MAINTENANCE PROCEDURE

INITIAL 250 HOURS MAINTENANCE (ONLY AFTER THE FIRST 250
HOURS)
Carry out the following maintenance only after the first 250 hours of operation on new machines.

●   Replace fuel filter cartridge

    Special tools are needed for inspection and maintenance, so contact your Komatsu distributor.

For details of the method of replacing or maintaining, see the section on EVERY 500 HOURS and 2000 HOURS
SERVICE.


INITIAL 1000 HOURS MAINTENANCE (ONLY AFTER THE FIRST
1000 HOURS)
Carry out the following maintenance only after the first 1000 hours of operation on new machines.

●   Check engine valve clearance,adjust

    Special tools are needed for inspection and maintenance, so contact your Komatsu distributor.

For details of the method of replacing or maintaining, see the section on EVERY 2000 HOURS SERVICE.


4-22

--- Page 25 ---
MAINTENANCE PROCEDURE                                                                         MAINTENANCE


CHECK AND ADJUST TRACK TENSION

                                                        WARNING
For details of starting the engine and operating the work equipment, see "BEFORE STARTING ENGINE
(PAGE 3-59)", "STARTING ENGINE (PAGE 3-73)", "AFTER STARTING ENGINE (PAGE 3-77)", and "WORK
EQUIPMENT CONTROLS AND OPERATIONS (PAGE 3-90)" in the OPERATION section.

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