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Takeuchi Mini excavator TB230 (No.130000003~). Operator's Manual (2014) - page 4

CONTROLS

ACCESSORIES

Third auxiliary hydraulic warning lamp

Auxiliary 2/4 select button (If equipped)

<Canopy>

This button is used to change from the

second auxiliary operation to the fourth

auxiliary operation.

<Cab>

Pressing this button displays the second

auxiliary on the LCD to indicate that the

second auxiliary operation is enabled.

Pressing this button again displays the

auxiliary 4th on the LCD to indicate that the

auxiliary 4th operation is enabled.

The actual operation is performed with the

auxiliary 2nd/4th switch (slider switch).

Refer to “Auxiliary 2nd/4th switch (If

equipped)” on page 2-51.

This lamp illuminates and an alarm sounds if

the auxiliary 3rd hydraulic pressure drops

abnormally while the engine is running.

2-74

CONTROLS

ACCESSORIES

OPERATING THE MACHINE WITH AN

ACCUMULATOR

Be sure to handle the high-pressure

nitrogen gas enclosed in the accumulator

with care. If handled incorrectly, it could

explode and cause serious injury. Strictly

observe the following precautions:

• Do not disassemble.

• Do not allow flame near or throw it into

6. Move or press the auxiliary hydraulic

a fire.

switches several times to release the

• Do not drill, weld or fuse.

residual pressure in the circuitry.

• Do not subject it to physical shock such

7. Move all the control levers and pedals

as hitting, rolling or dropping.

several times in all directions to release the

• Before disposing of the unit, the sealed

pressure from the working equipment

gas must be drained. Contact a

circuitry.

Takeuchi service agent for help.

8. Raise the safety lock lever to engage the

lock.

For a machine with an accumulator, the

residual pressure in the auxiliary hydraulic

Lowering the boom when the engine has

circuit or the working equipment circuit can

stopped

be released even after the engine is stopped.

Perform this operation within 10 minutes

after the engine stopping.

Releasing residual pressure

1. Sit at the operator’s seat.

Residual pressure refers to the pressure that

2. Turn the starter switch to the ON position.

remains in the hydraulic circuit after the

3. Lower the safety lock lever to the unlock

operation. Release the residual pressure as

position

necessary by using the following steps.

4. Slowly push the operating lever forward to

Perform the residual pressure releasing

lower the boom.

within 10 minutes after the engine stopping.

1. Return the throttle controller to idle the

engine at low speed.

2. Lower the bucket and dozer blade to the

ground.

3. Check that the safety lock lever is in the

released position.

4. Stop the engine.

5. Turn the starter switch to the ON position.

2-75

CONTROLS

ACCESSORIES

LOAD SAFETY DEVICE (IF EQUIPPED)

Arm (option)

The load safety devices include an

emergency shut-off valve and an overload

warning device.

Emergency shut-off valve

If the boom or arm stops due to the

breakage of hose, immediately move

away from the load being lifted and go to

a safe location.

If the hose breaks and the emergency shut-

The emergency shut-off valve (1) prevents

off valve (1) is activated to stop the operation

the boom or arm from falling rapidly in case

of boom or arm, lower the boom or arm by

the hydraulic hose is broken.

slowly operating the lever while ensuring

safety. Ask your sales or service dealer for

Boom

repair.

2-76

CONTROLS

ACCESSORIES

Overload warning device

If the overload is not removed after the

overload warning horn is sounded, the

machine may tip over. If the horn starts

sounding, stop operating the machine

and lighten the load.

If a weight greater than the lifting capacity is

applied or lifted, the overload warning device

is activated and the horn sounds. (When the

lift overload warning switch is turned on.)

Lift overload warning switch

OFF

Off

ON

On

2-77

OPERATION

BEFORE STARTING OPERATION

WALK-AROUND INSPECTION

BEFORE STARTING

Perform the walk-around inspections once a

OPERATION

day before starting the engine for the first

GETTING ON OR OFF THE MACHINE

time that day.

Refer to “MAINTENANCE, Walk-around

inspection”, on pages 5-16 and 5-17.

• Do not jump on or down from the

machine. Never attempt to get on or off

DAILY INSPECTION

the moving machine.

• When getting on or off the cab, first fully

Perform the daily inspections once a day

open the door to the locked position

before starting the engine for the first time.

and check that it does not move.

Refer to “MAINTENANCE, Daily inspection”,

on pages 5-18 to 5-23.

• Climb up/down the steps holding the

handrail to support your weight in a

three point secure stance (hand and

feet).

• Never use the safety lock lever or

control levers as hand holds.

3-2

OPERATION

STARTING AND STOPPING THE ENGINE

5. Insert the key into the starter switch, turn it

STARTING AND STOPPING

to the ON position, then perform the

following inspections:

THE ENGINE

BEFORE STARTING THE ENGINE

<Canopy>

1. Adjust the seat for a comfortable operating

position.

2. Fasten the seat belt.

<Cab>

3. Check that the safety lock lever is in the

locked position.

· All warning lamps flash and an alarm is

sounded for two seconds. The meters

also start functioning. After two seconds,

the deceleration lamp (3) stops flashing

4. Check that all levers and pedals are in the

and remains lit, while the battery charge

neutral position.

warning lamp (1) and engine oil pressure

warning lamp (2) remain flashing. (If the

auxiliary 3rd is selected, it is also

flashing.) The other lamps go out.

· Turn on the light switch to check that the

boom light, front light and tail lamps turn

on.

· Check the fuel level.

If a lamp does not light or the alarm is not

sounded, the display or a wire may be

damaged. Ask your sales or service dealer

for repair.

3-3

OPERATION

STARTING AND STOPPING THE ENGINE

STARTING THE ENGINE

press the deceleration button to cancel

the deceleration mode.

Starting in cold climates

• Clear all personnel from the work area.

• Sound the horn to warn people around

the machine.

Never use starting fluid on this engine, as

the starting fluid could cause an

IMPORTANT: Do not run the starter motor

explosion.

for more than 15 consecutive seconds. If

the engine fails to start, wait for 30

seconds, and then try again to start the

engine.

IMPORTANT: If the engine stalls due to

fuel shortage, add fuel, turn the key to the

ON position for 60 seconds, and then turn

it to the START position. Running the

starter for a long time before there is

enough fuel is going through can cause

the starter to fail.

Normal starting

1. Turn the throttle controller to the middle

position.

1. Turn the starter key to the START position

2. Turn the starter key to the ON position,

and start the engine.

and confirm that the glow lamp is on. (The

2. Once the engine starts, release the key.

glow lamp stays lit for 15 seconds when

The key automatically returns to the ON

the coolant temperature is -10°C (14°F).)

position.

3. After the glow lamp goes out, press the

3. Check that the warning lamps are off.

deceleration button (to cancel the

For safety reasons, it is designed that the

deceleration mode), and then turn the key

deceleration function is activated to set

to the START position to start the engine.

the engine revolutions to low idling

4. Once the engine starts, release the key.

whenever the engine is started.

The key automatically returns to the ON

Cancel the deceleration mode by pressing

position.

the deceleration button as necessary.

5. Check that the warning lamps are off.

4. Warm up the engine.

6. Return the throttle controller to the original

Refer to “Warming up the engine” on page

position and warm up the engine.

3-5.

Refer to “Warming up the engine” on page

5. After the completion of the warming up,

3-5.

3-4

OPERATION

STARTING AND STOPPING THE ENGINE

WARMING UP THE ENGINE

STOPPING THE ENGINE

IMPORTANT: Avoid racing the engine until

IMPORTANT: Do not stop the engine

it has warmed up.

suddenly when operating with heavy

Do not warm up the engine for a long time

loads or at the maximum speed. Doing so

(20 minutes or more). When idling is

may cause the engine to overheat or

required, occasionally place a load or run

seize. Never stop running the engine

the engine at medium speed.

suddenly except in emergency.

1. Return the throttle controller, and then run

1. Return the throttle controller.

at a low idle with no load for 5 minutes.

2. Idle the engine for about 5 minutes to

gradually let it cool.

3. Turn the starter key to the OFF position to

stop the engine.

3-5

OPERATION

OPERATING THE MACHINE

OPERATING THE MACHINE

LEVER PATTERN (ISO PATTERN)

• Before starting operation, carefully check which lever pattern you are going to use.

• It is described using the ISO pattern in this manual.

Left crawler forward

Right crawler forward

Left crawler reverse

Right crawler reverse

Arm out

Boom lower

Arm in

Boom raise

Upperstructure slew left

Bucket load

Upperstructure slew right

Bucket dump

Boom swing left

Dozer blade lower

Boom swing right

Dozer blade raise

3-6

OPERATION

OPERATING THE MACHINE

LEVER PATTERN (G PATTERN) (IF EQUIPPED)

• Before starting operation, carefully check which lever pattern you are going to use.

• It is described using the ISO pattern in this manual.

Left crawler forward

Right crawler forward

Left crawler reverse

Right crawler reverse

Boom lower

Arm out

Boom raise

Arm in

Upperstructure slew left

Bucket load

Upperstructure slew right

Bucket dump

Boom swing left

Dozer blade lower

Boom swing right

Dozer blade raise

Refer to “Selecting a lever pattern” on page 8-5.

3-7

OPERATION

OPERATING THE MACHINE

WARMING UP THE MACHINE

2. Fully lower the safety lock lever to

(HYDRAULIC OIL)

disengage the lock and lift the bucket from

the ground.

Operating the working equipment without

warming up the machine (hydraulic oil) is

dangerous, as the working equipment

cannot response to controls quickly or may

move in unexpected ways, and the safety

devices may not operate properly. Be

sure to sufficiently warm up the machine.

IMPORTANT: Do not operate the levers

too quickly when the hydraulic oil

temperature is below 20°C (68°F). The

3. Extend and retract each of the cylinders

proper hydraulic oil temperature during

slowly several times with no load.

operation is 50 to 80°C (122 to 176°F). If

operations must be performed at lower

temperatures, heat up the hydraulic oil to

at least 20°C (68°F).

Normal warm-up

4. Slew slowly to the left and the right several

times.

1. Turn the throttle controller to the middle

position, and then run the engine at medium

speed for about five minutes with no load.

5. Travel slowly forward and in reverse

several times.

3-8

OPERATION

OPERATING THE MACHINE

Warm-up in cold climates

<Cab>

1. Perform the normal warm-up procedure.

1. Check that the warning lamps and meters

2. Set the bucket cylinder at the stroke end

are as follows:

and keep it there.

· Are all warning lamps off?

Do not keep this condition for more than

· Is the water temperature level within the

30 seconds.

green range?

3. Repeat Step 2 until the bucket operating

2. Check that there are no irregularities in the

speed becomes normal.

exhaust color, sound and vibrations.

INSPECTION AFTER WARM-UP

After warming up the engine and machine

(hydraulic oil), perform the checks and

inspections described below, and repair if

necessary.

<Canopy>

3. Raise the safety lock lever to the locked

position, and then check that the

operating and travel levers are locked.

3-9

OPERATION

OPERATING THE MACHINE

OPERATING THE TRAVEL LEVERS/

Moving the machine forward and

PEDALS

backward

• Never allow anyone to enter the

machine’s slewing radius and path.

• Signal your intention to move by

sounding the horn.

• There is a blind spot in the rear of the

machine. Before traveling in reverse, as

necessary, swing the cab around in

reverse to check that the area is safe

and clear.

1. Turn the throttle controller and increase

the engine speed.

• Before operating the travel levers/

pedals, make sure that the dozer blade

is to the front of the operator’s seat.

2. Fully lower the safety lock lever to

Remember that when the dozer blade is

disengage the lock.

to the rear of the operator’s seat, the

travel levers/pedals must be operated in

the reverse direction from when it is to

the front.

• Clear all obstacles from the path of the

machine.

3. Fold the hoe attachment and lower it 30 to

40 cm (12 to 16 in.) above the ground.

4. Lift the dozer blade.

5. Operate the left and right travel levers as

below.

3-10

OPERATION

OPERATING THE MACHINE

Traveling in 2nd (High) speed

When a load greater than a set value is

applied during traveling in 2nd (high)

speed, the speed will automatically slow

down to 1st (low) speed. When the load

becomes lighter, the speed will increase

and return to 2nd (high) speed. It should

be noted that the travel speed changes

depending on the load condition (for

When the dozer blade is in front of the

machines with the automatic travel shift-

operator’s seat:

down system).

To move forward:

Tilt the levers forward.

To move backward:

Tilt the levers backward.

Press the travel speed switch to set to the

2nd (high) speed, and press it again to return

to the 1st (low) speed.

When the dozer blade is behind the

operator’s seat:

To move forward:

Tilt the levers backward.

To move backward:

Tilt the levers forward.

3-11

OPERATION

OPERATING THE MACHINE

Pivot turn

Spin turn

Turning to the left when stopped:

To spin left:

To turn forward to the left:

Tilt the left lever backward and the right

Tilt the right lever forward.

lever forward.

To turn backward to the left:

To spin right:

Tilt the right lever backward.

Tilt the right lever backward and the left

To turn to the right, operate the left lever in

lever forward.

the same way as for the right lever.

Turning to the left while traveling:

To turn left while traveling forward:

Set the left lever to neutral.

To turn left while traveling backward:

Set the left lever to neutral.

To turn to the right while traveling, operate

the right lever in the same way as for the left

lever.

3-12

OPERATION

OPERATING THE MACHINE

STOPPING TRAVEL

• Park the machine on a flat, rigid and

safe ground. Set the parking brake. If

you must park on a slope, chock the

tracks to block the machine.

• If any control is accidentally touched

when the safety lock lever is not locked,

the machine may suddenly move and

cause serious injury or death.

Never stop running the machine suddenly

except in emergency. Stop in good time,

if possible.

1. Set the left and right travel levers slowly to

the neutral position. The machine stops.

3-13

OPERATION

OPERATING THE MACHINE

OPERATING THE WORKING EQUIPMENT

Slewing

Check the surrounding area for safety

• Before starting operation, carefully

before slewing.

check which lever pattern you are going

to use.

• It is described using the ISO pattern in

this manual.

Upperstructure slew left:

Tilt the left operating lever to the left.

Upperstructure slew right:

Tilt the left operating lever to the right.

Use the right operating lever to operate the

boom and bucket.

Operating the boom

Use the left operating lever to operate the

arm and slewing.

Return the operating levers to the neutral

position to stop the hoe attachments.

1. Lower the safety lock lever to the

unlocked position.

2. Set the pedal cover to the unlocked

position.

Boom lower:

Tilt the right operating lever forward.

Boom raise:

Tilt the right operating lever backward.

3-14

OPERATION

OPERATING THE MACHINE

Operating the arm

Operating the boom swing

Arm in:

Boom swing left:

Tilt the left operating lever backward.

Step on the left side of the pedal.

Arm out:

Boom swing right:

Tilt the left operating lever forward.

Step on the right side of the pedal.

Operating the bucket

Operating the dozer blade

Bucket load:

Dozer blade lower:

Tilt the right operating lever to the left.

Tilt the lever forward.

Bucket dump:

Dozer blade raise:

Tilt the right operating lever to the right.

Tilt the lever backward.

3-15

OPERATION

OPERATING PROCEDURES

Be gentle when using the hydraulic

OPERATING PROCEDURES

cylinder

PROHIBITED OPERATIONS

• Do not operate on bedrock (hard or

soft).

• Do not slew /swing while traveling. If

you must operate the hoe attachment

while traveling, operate at speeds slow

enough so you have complete control at

all times.

Do not perform demolition or leveling

Do not extend the hydraulic cylinders to the

using slew force

stroke ends. Operate them with leeway.

Do not demolish walls or level ground using

Do not support the machine body with the

slew force. Also, do not dig the bucket teeth

hoe attachment when the body is lowering

into the ground during slewing. Doing so will

with the arm cylinder fully extended. Doing

damage the hoe attachment.

so concentrates the load on the arm cylinder

and could damage the arm cylinder.

Do not dig while traveling

Do not dig the bucket into the ground and

use the traveling force to dig.

3-16

OPERATION

OPERATING PROCEDURES

Do not drive piles with the bucket or dig

Digging bedrock

by banging the bucket

For hard base rock, break the rock up into

Doing so will shorten the service life of the

small pieces with a breaker, etc., before

hoe attachment. Use the hydraulic force to

digging. This prevents damage to the

dig.

machine and is thus more economical in the

end.

Do not perform operations using the

machine’s dropping force

Caution on exposing the dozer blade to

shocks

Hitting the dozer blade against rocks, etc.,

could damage the dozer blade or the blade

cylinder.

Putting excessive strain on the machine will

shorten its service life. When digging, use the

hydraulic force of the cylinders and the

shallow and long strokes.

3-17

OPERATION

OPERATING PROCEDURES

Caution on folding the hoe attachment

Pay attention to the dozer blade when

digging

Be careful not to let the bucket to hit the

dozer blade when the hoe attachment is

When digging deeply with the dozer blade

being folded.

positioned at the front, be careful that the

boom cylinder and bucket do not hit the

Do not use the dozer blade as an

dozer blade.

outrigger

Operate with the dozer blade at the rear

whenever possible.

Caution on digging down with the dozer

blade

This dozer blade is designed for simple earth

pushing. Do not dig down deeply with the

dozer blade. Doing so could damage the

dozer blade and undercarriage.

3-18

OPERATION

OPERATING PROCEDURES

CAUTIONS ON OPERATING

• When traveling in 2nd speed, do so with

the dozer blade at the front.

Cautions on traveling

Cautions on using machine in water

Traveling over obstacles (rocks, stumps, etc.)

may put a great load on the machine body

If the rear of the machine is submerged in

and may cause damage to it. Avoid crossing

water as shown in the figure above, it causes

over obstacles whenever possible. If you

the radiator fan to turn in water, resulting in

must do so, keep the hoe attachment near

damage to the fan. The rear of the machine

the ground, travel at a low speed, and go

must not be submerged.

over the obstacle at the center of the crawler.

Cautions on traveling in 2nd (High) speed

• Allowable water depth

Use the machine in water only when the

water is up to the bottom of the carrier

• On uneven ground, maintain the low speed

roller (1).

and avoid starting, stopping or changing

• For those parts used in water for a long

directions abruptly.

time, apply enough grease until the old

• When a load greater than a set value is

grease is expelled.

applied during traveling in 2nd (high)

• Never submerge the slew bearing or main

speed, the speed will automatically slow

body in water or sand. If submerged,

down to 1st (low) speed. When the load

contact a Takeuchi service agent for

becomes lighter, the speed will increase

inspection.

and return to 2nd (high) speed. It should be

noted that the travel speed changes

depending on the load condition. (for

machines with the automatic travel shift-

down system)

3-19

OPERATION

OPERATING PROCEDURES

CAUTIONS ON TRAVELING ON SLOPES

• The machine may slip sideways even on

a slight slope if they are covered with

grass or dead leaves, or when traveling

on a wet metal plate or frozen surfaces.

• Never travel on slopes that are too

Do not allow the machine to position

steep for the machine to maintain its

sideways to slopes.

stability. (maximum gradeability: 30°,

lateral tipping angle: 15°) Note that in

reality, the machine’s stability becomes

Traveling posture on slopes

lower than the above values depending

Climbing slopes

on the working condition.

• When traveling on slopes, lower the

bucket to a height of 20 to 30 cm (8 to

12 in.) above the ground. When climbing

a steep slope, extend the hoe

attachment to the front. In emergencies,

lower the bucket to the ground and stop

the machine.

• When traveling on slopes or grades,

drive slowly in 1st (low) speed.

• When climbing a hill, keep the

operator’s seat facing the hillside. When

descending a hill, keep the operator’s

When climbing slopes of 15° or more,

seat facing the downhill direction. In

maintain the machine posture as shown in

either case, travel must be done while

the figure above.

paying attention to the ground in front

of the machine.

Descending slopes

• Do not descend slopes in reverse.

When descending slopes of 15° or more,

• Do not change directions on slopes or

slow down the engine speed and maintain

traverse slopes. First return to a flat

the machine posture as shown in the figure

surface, and then take an alternative

above.

path.

3-20

OPERATION

OPERATING PROCEDURES

Braking when descending slopes

If the engine stops

When descending slopes, the brakes are

If the engine stops when descending a

applied automatically once the travel levers

slope, set the travel levers to the neutral

are returned to the neutral position.

position, stop the machine, then start the

engine.

If the crawler slips

Do not open the door while traveling on

slopes

If the crawler slips while climbing a slope and

impossible to travel, use the pulling force of

the arm to climb the slope.

Opening the door while traveling on slopes is

dangerous, as the force required to open

and close the door changes abruptly. Always

keep the door closed when traveling on

slopes.

3-21

OPERATION

OPERATING PROCEDURES

GETTING OUT OF MUD

OPERATIONS POSSIBLE WITH THIS

MACHINE

If the machine gets stuck in mud, use the

procedure below to get it out.

Excavating

If one crawler is stuck

1. Set the dozer blade on the side opposite

to the side you want to dig on.

1. Swing the bucket to the side of the

2. Use the arm and bucket and dig with

crawler being stuck.

shallow, long strokes. The maximum

2. Set the arm and boom to an angle of 90

digging force can be obtained when the

to 110°.

boom and arm angle is 80 to 120°. Use

3. Press the bottom of the bucket (not the

this angle for effective digging.

teeth) against the ground.

4. Place a plank or the like under the lifted

Digging ditches

crawler.

5. Lift the bucket and slowly move the

machine out of the mud.

If both crawlers are stuck

Install a bucket suited for digging ditches

and set the crawlers parallel to the ditch to

be dug for greater efficiency.

When digging wide ditches, dig the sides

first, and then dig the center.

1. Perform the steps 1 to 4 above for both

crawlers.

2. Dig the bucket into the ground in front of

the machine.

3. Pull with the arm while traveling forward to

slowly move the machine out.

3-22

OPERATION

OPERATING PROCEDURES

Digging side drains

Leveling

Use the boom swing function to dig side

1. Bring the hoe attachment close to the

ditches as shown in the figure.

body.

2. Gradually remove the dirt from the side of

Loading

the mound.

3. Once the mound is low, remove the dirt

from the top. If the load becomes too

heavy for the machine body, adjust by

raising or lowering the dozer blade.

When loading dirt onto a truck bed, load

from the back of the truck, as it is easier and

able to load more load than doing it from the

front.

Also, use a small slewing angle for greater

efficiency.

3-23

OPERATION

PARKING THE MACHINE

3. Lower the bucket and the dozer blade to

PARKING THE MACHINE

the ground.

PARKING

4. Raise the safety lock lever to the locked

position.

5. Stop the engine and remove the key.

Refer to “Stopping the engine” on page

3-5.

For machines equipped with accumulator:

Refer to “Operating the machine with an

accumulator” on page 2-75.

INSPECTION AND CHECKS AFTER

STOPPING THE ENGINE

1. Check for oil or water leak and inspect the

working equipment, covers and

• Park the machine on a flat, rigid and

undercarriage. If any irregularities are

safe ground. Set the parking brake.

found, repair.

2. Fill up the fuel tank.

Refer to “Inspecting the fuel level” on page

5-21.

3. Remove any paper scraps or dirt from the

engine room.

4. Remove any mud from the undercarriage.

Locking

Be sure to lock the following places:

If you must park on a slope or incline,

park the machine securely and block

the movement of the machine.

• When parking on a street, use barriers,

caution signs, lights, etc., so that the

machine can easily be seen even at

night to avoid collision with other

vehicles.

• Before leaving the operator’s seat, raise

the safety lock lever to engage the lock

• Cab door

and stop the engine. Also, be sure to

• Engine hood

remove the key, lock the door and

• Covers

covers, take it with you and store it in a

specified place.

1. Set the left and right travel levers to the

neutral position.

2. Return the throttle controller to set the

engine to low idling.

3-24

OPERATION

HANDLING RUBBER CRAWLERS

HANDLING RUBBER

CRAWLERS

Rubber crawlers have an inherent weakness,

lack of strength, due to their use of rubber.

Be sure to observe the prohibitions and

cautions below to prevent the crawlers from

being damaged or coming off.

PROHIBITIONS

• Do not let fuel, oil, salt or chemical solvents

Do not travel or operate the machine in the

get on the crawlers. These substances

following places:

may corrode the bonding of the steel cores

on the crawlers, resulting in rust or peeling.

If any of these substances gets on the

crawler, immediately clean it off with water.

• Traveling and slewing on crushed rock,

extremely rough hard rock, steel beams,

scrap iron, or near the edges of steel plates

will cause damage to the rubber crawlers.

• It will cause an irregular wear or damage to

the lugs, if the machine travels on irregular

surfaces such as recently paved with

asphalt, exposed to a bonfire or of hot iron

sheets under the blazing sun.

• Do not move earth in places where the

rubber crawlers may slip. Doing so may

speed up lug wear.

• Traveling on riverbeds or places where

there are large numbers of boulders may

cause the stones to get caught and

damage the crawler or make the crawler

come off.

• Do not use the machine on the seashore.

The salt may corrode the steel core.

3-26

OPERATION

HANDLING RUBBER CRAWLERS

CAUTIONS

Observe the following cautions when

operating the machine:

• Rubber crawler belts are not as stable as

steel crawler belts since the entire lugs are

made of rubber. Be very careful when

slewing and swinging sideways.

• Do not turn the undercarriage with the front

of the machine body lifted using the hoe

PREVENTING THE RUBBER CRAWLERS

attachment (the upperstructure is not

FROM COMING OFF

turned). Doing so will twist the crawlers

with the load concentrated on a single

Observe the following cautions to prevent

point on the crawler belt, causing rapid

the crawler from coming off:

damage to the crawlers.

• Always keep the crawlers at the proper

• Avoid changing course abruptly or spin-

tension.

turning on concrete surfaces whenever

possible. Doing so may wear or damage

the rubber crawlers.

• Avoid drops that may expose the rubber

crawlers to strong shocks.

• Salt, potassium chloride, ammonium

sulfate, potassium sulfate, and triple

superphosphate of lime can damage the

crawler belts. If any of these substances

gets on the crawler belts, wash if off

thoroughly with water.

• Do not let the sides of the rubber crawlers

rub against concrete or walls.

• When traveling over a large step such as a

• Do not damage the rubber crawlers by

cobblestone or rock (20 cm (8 in.) or

hitting the bucket against them.

deeper), climb up the step at the right

• Be especially careful on snowy or frozen

angle and do not change courses on top of

surfaces in winter, as the crawler belts tend

the step.

to slip in such conditions.

• Use rubber crawler belts at temperatures

between -25°C to +55°C (-14°F to 131°F).

• When storing the rubber crawlers for long

periods of time (three months or more), do

so indoors in a place not exposed to direct

sunlight or rain.

3-27

OPERATION

HANDLING RUBBER CRAWLERS

• When climbing in reverse, do not change

• Do not change directions when the crawler

directions at the point where the slope

belts are slack as shown in the figure.

starts.

• The rubber crawler belts will come off if the

• Avoid traveling by setting one crawler on a

machine travels backward in this condition.

slope or projecting portion and the other

crawler on a flat surface (with the machine

at a tilt of 10° or more). Travel with both

crawlers set on flat surfaces.

• The rubber crawler belts will come off if the

machine turns in this condition.

3-28

TRANSPORT

LOADING AND UNLOADING

LOADING AND UNLOADING

The machine may roll or tip over or fall

while being loaded or unloaded. Take the

following precautions:

• Select a firm, level surface and keep

sufficient distance from road shoulders.

• Secure the ramps of adequate strength

and size to the truck bed. The slope of

the ramps must not exceed 15°. If the

1. Set the parking brake on the transporter

rumps are bowed down too low,

and chock the wheels.

support them with poles or blocks.

2. Fix the ramps securely to the truck bed.

• Never use the working equipment to

The slope of the ramps must not exceed

load or unload the machine. Doing so

15°.

may result in tipping over or falling

3. Align the center of the truck bed with the

down of the machine.

center of the machine, and of the ramp

• Keep the truck bed and loading ramps

with the center of the crawler.

clean of oil, soil, ice, snow, and other

4. Make sure the dozer blade does not hit

materials to prevent the machine from

the ramps.

sliding sideways. Clean the crawlers.

5. Lower the hoe attachment as far as

• Chock the transporter wheels to prevent

possible without letting it touch the

movement.

transporter.

• Turn off the deceleration switch and

6. Decrease the engine speed.

auto-deceleration switch. Otherwise,

the engine speed may suddenly

increase to cause troubles.

• When being loaded or unloaded, travel

slowly in 1st (low) gear by following the

signal from the signal person.

• Never change courses on the ramps.

• Do not slew/swing on the ramps. The

machine may tip over.

• When slewing/swinging on the truck

bed, do it slowly as the footing should

be unstable.

• Lock the cab door after being loaded, if

applicable. Otherwise, the door may

open during transport.

• Chock the tracks and secure the

machine to the truck bed with wire rope

or chain.

When loading or unloading the machine, be

sure to use ramps or a platform and follow

the procedure below.

4-2

TRANSPORT

HOISTING THE MACHINE

4-5

TRANSPORT

SECURING THE MACHINE

SECURING THE MACHINE

After loading the machine at the specified position, secure it as described below.

Transporting posture

1. Lower the dozer blade.

Precautions to be taken during

2. Extend the bucket cylinder and arm

transportation

cylinder fully, and then lower the boom.

3. Raise the safety lock lever to the locked

position.

• Know and follow the applicable safety

4. Stop the engine, remove the starter key

rules, vehicle code and traffic laws

and lock all locks.

when transporting the machine.

5. Place the stoppers (chocks) in front and

• Select the best transport route by

behind the crawlers.

considering the length, width, height

6. Install a chain or wire rope over the lower

and weight of the truck with the

frame of the machine and fasten it

machine loaded on it.

securely to prevent the machine from

• Never abruptly start or stop or run at a

slipping sideways.

high speed at the sharp curves during

7. Secure the bucket with a chain or wire

transport. Doing so will move or lose the

rope.

balance of the loaded machine.

IMPORTANT: Place a wooden block under

the bucket to protect the floor from

damage caused by the bucket.

4-6

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