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Takeuchi Mini excavator TB215R (Serial No.215000003~). Operators Manual (2013) - page 5

MAINTENANCE

WHEN REQUIRED

Installation

5. Slide the O-ring (4).

1. Set the O-ring (4) on the bucket as shown

Replacing the pin seal

on the figure above.

1. Set the pin seal (3) in the direction shown

2. Align the pin hole (A) on the bucket with

on the figure above.

the pin hole on the arm (5), and install the

2. Use a mallet to slowly press the pin seal

pin (2).

in. Be careful not to damage the seal.

3. Operate the cylinder, align the pin hole (B)

on the bucket with the pin hole on the link

arm (6), and install the pin (2).

1

AD6G034

4. Align the turn prevention holes, install the

lock pin (1), and then engage the ring

inside.

5-51

MAINTENANCE

WHEN REQUIRED

LUBRICATING THE LEVERS

Set the machine to the parking posture,

stop the engine, remove the starter key

and store it. Failure to do so may result in

the machine moving abruptly, leading to

serious injury or death.

If the levers or pedals no longer move

smoothly, grease them.

Operating levers

1. Remove the lower mount section of the

boot (1) and turn it upward.

2. Wipe off the old grease.

3. Apply grease to points (A) and (B).

4. Set the boot (1) back as it was.

5-52

MAINTENANCE

WHEN REQUIRED

INSPECTING THE RUBBER CRAWLERS

(3) Metal core

Repair or replace the rubber crawlers if their

condition becomes as described below.

Consult your sales or service dealer for repair

or replacement.

Rubber crawler

Replace the crawler if the entire crawler is

stretched and cannot be adjusted.

(1) Lug

Replace if even one metal core is off.

(4) Rubber

Replace if the height of (A) is 5 mm (0.2 in.)

or below.

(2) Steel cord

Repair if there are cracks of 60 mm (2.4 in.)

or greater in length.

If the steel cord is visible, repair as soon as

possible, regardless of the length of the

crack.

Replace if the steel cord is exposed for two

links or more.

Replace if the half or more of the steel cords

on one side are cut.

5-53

MAINTENANCE

WHEN REQUIRED

REPLACING THE RUBBER CRAWLERS

Removal

1. Fully release the tension of the rubber

crawler.

Refer to “Inspecting and adjusting the

• If you must work beneath the raised

crawler tension” on page 5-26.

machine or working equipment, always

use wood blocks, jack-stands or other

rigid and stable supports. Never get

under the machine or working

equipment if they are not sufficiently

supported.

• If maintenance must be performed with

the engine running, always work as a

two person team communicating each

other.

· One person must sit in the operator’s

seat so that he/she can immediately

stop the engine when necessary. He/

2. Use the working equipment to lift the

she must take care not to touch the

body.

lever or pedal unless necessary.

· The one who performs maintenance

must make sure to keep his/her body

or clothing away from the moving part

of the machine.

3. Set an iron pipe (1) in the rubber crawler

and turn the sprocket slowly in the reverse

direction.

4. Turn until the iron pipe (1) is directly next to

the idler and the rubber crawler lifts away

from the idler, then stop turning the

sprocket.

5. Slide the rubber crawler sideways and

remove it from the crawler frame.

Remove the other rubber crawler using

the same procedure.

5-54

MAINTENANCE

WHEN REQUIRED

Installation

1. Use the working equipment to lift the

body.

2. Set the rubber crawler on the sprocket.

3. Set an iron pipe (1) in the rubber crawler

and turn the sprocket slowly in the reverse

direction.

4. Turn until the iron pipe (1) is directly next to

the idler and the rubber crawler lifts away

from the idler, then stop turning the

sprocket.

5. Slide the rubber crawler inward, engage it

on the idler, then pull out the iron pipe.

6. Check that the rubber crawler is securely

engaged on the sprocket and idler.

7. Tighten the rubber crawler to the standard

tension.

Refer to “Inspecting and adjusting the

crawler tension” on page 5-26.

8. Install the other rubber crawler using the

same procedure.

5-55

TROUBLESHOOTING

SYMPTOMS THAT ARE NOT MALFUNCTIONS

• It becomes less easy to operate the

SYMPTOMS THAT ARE NOT

machine when an attachment weighing

more than a standard arm or bucket is

MALFUNCTIONS

installed.

The symptoms listed below are not

malfunctions.

AG7J002

• The arm retracting speed momentarily

slows down when it reaches an almost

vertical position while the engine is running

at low speed.

AG7J003

• The bucket teeth moving speed

momentarily slows down when it reaches

an almost horizontal position while the

engine is running at low speed.

• The slew motor produces noise at the

beginning and end of the slewing.

• The travel motor produces noise when

stopped suddenly from its high speed

traveling.

• The control valve produces noise if

excessive force is applied to the working

equipment or when it moved to the stroke

end.

6-2

TROUBLESHOOTING

IF THE ENGINE OVERHEATS

Remedy procedure

IF THE ENGINE OVERHEATS

1. Park the machine in a safe place.

2. Check if steam is coming out of the closed

engine hood and covers.

• Do not open the engine hood and

3. If there is steam, stop the engine

covers when steam is coming from it.

immediately and contact your sales or

The steam or hot water may spurt out

service dealer for repair. If steam, is not

and cause burns.

coming out run the engine at low idle and

• Do not try to remove the radiator cap or

let the water temperature cool down.

the drain plug when the cooling water is

4. When the water temperature gauge LED

hot. Stop the engine, wait until the

drops in the green zone, stop the engine.

engine and the radiator cool, and then

5. Perform the inspections and the remedies

slowly loosen the radiator cap to release

listed below once the engine cools down.

the internal pressure.

· Fan belt slack

Adjust

• Before performing maintenance, stop

Refer to page 5-23.

the engine and allow the machine to

· Coolant level

Add

cool down.

Refer to page 5-16.

· Water leakage

Repair

The symptoms listed below indicate

· Radiator fins

Clean

overheating.

Refer to page 5-36.

· Sediment in cooling system

............................... Clean

Refer to page 5-40.

If the problem persists after the above

remedies, contact your sales or service

dealer for repair.

• An alarm is sounded and the engine

emergency lamp and the coolant

temperature warning lamp start flashing.

• The water temperature gauge LED is in the

red zone.

• The engine slows down and the engine

power decreases.

• Steam comes from the engine room.

6-3

TROUBLESHOOTING

IF THE BATTERY GOES DEAD

Connecting the jumper cables

IF THE BATTERY GOES DEAD

The symptoms below indicate that the

IMPORTANT: Set the starter keys of the

battery is dead.

booster vehicle and the dead machine to

• The starter motor does not turn or fails to

the OFF position.

start the engine.

• The horn is too weak.

Remedy procedure

Start the engine using the booster battery on

the other vehicle (booster vehicle) and the

jumper cables.

• When starting the engine using the

jumper cables, be sure to connect the

cables by following the proper steps.

Improper use of jumper cables can

1. Connect the clip of jumper cable (R) to the

result in battery explosion or

positive (+) battery terminal of the dead

unexpected machine motion.

machine.

· Do not allow the booster vehicle and

2. Connect the other clip of jumper cable (R)

the machine with a dead battery (dead

to the positive (+) battery terminal of the

machine) to touch each other.

booster vehicle.

· Do not allow the positive (+) and the

3. Connect the clip of jumper cable (B) to the

negative (-) clips of the jumper cables

negative (-) battery terminal of the booster

to touch each other.

vehicle.

· When connecting, attach the jumper

4. Connect the other clip of jumper cable (B)

cable to the positive (+) terminals first.

to the engine block of the dead machine.

When disconnecting, remove the

Connect the clip to a place as far from the

cable from the negative (-) terminal

battery as possible.

(ground) first.

· Connect the last clip of the jumper

Starting the engine

cable to a point as far away from the

1. Check that the clips are securely

battery as possible.

connected to the terminals.

• Always wear the protective goggle when

2. Start the engine of the booster vehicle and

jump starting the engine by using the

run it at high speed.

jumper cables.

3. Start the engine of the dead machine.

IMPORTANT: Use the jumper cables and

clips of a size suited to the capacity of

battery. Do not use damaged or corroded

jumper cables and clips.

IMPORTANT: Be sure that the battery of

the booster vehicle has the same

capacity as the battery of the dead

machine.

IMPORTANT: Be sure to connect the clips

securely.

6-4

TROUBLESHOOTING

IF THE BATTERY GOES DEAD

Disconnecting the jumper cables

Once the dead machine is successfully

running, remove the jumper cables by

following the same steps as for connection in

the reverse order.

1. Disconnect the clip of jumper cable (B)

from the engine block of the dead

machine.

2. Disconnect the other clip of jumper cable

(B) from the negative (-) battery terminal of

the booster vehicle.

3. Disconnect the clip of jumper cable (R)

from the positive (+) battery terminal of the

booster vehicle.

4. Disconnect the clip of jumper cable (R)

from the positive (+) battery terminal of the

dead machine.

Recharging

Ask your sales or service dealer for

recharging the dead battery.

6-5

TROUBLESHOOTING

IF A FUSE BLOWS

Fuse layout and circuits protected

IF A FUSE BLOWS

If a light does not come on or the electrical

Capacity

Symbol

Protected circuit

system does not work, a fuse may be blown.

Inspect the fuses.

25A

Starter switch

INSPECTING AND REPLACING THE FUSE

Third auxiliary

10A

AUX3

hydraulic

5A

Lever lock

If the fuse blows again soon after

replacement, then the electric system is

15A

Light

likely faulty. It may pose a fire hazard if

not properly repaired. Contact your sales

15A

Feed pump

or service dealer for advice.

15A

OPT

Option

1. Turn the starter key to the OFF position to

stop the engine.

10A

Horn

2. Open the maintenance cover B.

15A

Cluster

3. Open the fuse box cover (1).

4. Check for any blown fuses.

5. If a fuse is blown, replace it with a spare

fuse of the same capacity.

6-6

TROUBLESHOOTING

IF A FUSE BLOWS

INSPECTING THE FUSIBLE LINK

If the machine is not turned on after turning

the starter switch to the ON position, the

cartridge type fusible link (1) is likely blown.

Open the maintenance cover and inspect. If

the fusible link is blown, please contact your

sales or service dealer.

Note: Fusible links are large type fuses used

in high current applications. Like a regular

fuse, they act as fuses by protecting the

electric components and wirings from

damage caused by excessive current draw.

6-7

TROUBLESHOOTING

RESTARTING AFTER ADDING FUEL

RESTARTING AFTER ADDING

FUEL

BLEEDING AIR FROM THE FUEL SYSTEM

3. Turn the starter key to the ON position and

hold it for about 10 to 15 seconds.

The automatic air bleeder bleeds air from

the fuel system.

Note: Air in the fuel system causes the

1. Add fuel.

engine to fail to start or to have other

problems. Always bleed air when the fuel

tank is emptied or when there is air in the

fuel system.

2. Open the valve (2) of the water separator

and the fuel filter.

6-8

TROUBLESHOOTING

IF A WARNING LAMP FLASHES

IF A WARNING LAMP FLASHES

If an alarm is sounded or a warning lamp starts flashing during operation, park the machine in

a safe place and perform the remedy procedures described below.

Warning lamp

Lamp name

Causes and remedies

Engine

There is a problem in the engine.

emergency

lamp

Refer to the respective warning lamp below.

Battery charge

There is a problem with the fan belt or charger.

warning lamp

Check the fan belt for slack or breakage and adjust as

necessary.

If the lamp continues flashing after maintenance, there is

likely a problem with the charger. Consult your sales or

service dealer for help.

Refer to “Inspecting and adjusting the fan belt” on page

5-23.

Engine oil

A problem has occurred in the engine lubrication system.

pressure

Inspect the engine oil level.

warning lamp

If the lamp is flashing when the oil is normal or if it

continues flashing after replenishment of oil, consult your

sales or service dealer.

Refer to “Inspecting and replenishing the engine oil” on

page 5-17.

Coolant

The coolant temperature is too high and the engine is

temperature

overheating.

warning lamp

Refer to “If the engine overheats” on page 6-3.

Fuel level

The fuel level is too low. Add fuel.

warning lamp

Refer to “Inspecting the fuel level” on page 5-18.

6-9

TROUBLESHOOTING

OTHER SYMPTOMS

OTHER SYMPTOMS

For symptoms not included in the table below or if the problem persists after the proper

remedies have been taken, consult your sales or service dealer.

Symptoms

Major causes

Remedies

Left and right operating levers

• Insufficient grease on the

• Grease the levers.

do not move smoothly

left and right operating

Refer to page 5-52.

levers

Blade lever and throttle lever

• Wire is stretched too lose

• Adjust or replace (ask your

do not move smoothly

sales or service dealer).

Hoe attachment, slewing or

• Safety lock lever is raised

• Lower (release) the safety

traveling operation not

(locked)

lock lever.

possible

Refer to page 2-19.

• Fuse is blown

• Replace the fuse.

Refer to page 6-6.

• Adjustment of travel lock is

• Adjust the travel lock (ask

faulty

your sales or service dealer).

Digging force is insufficient

• Hydraulic oil level too low

• Add to the specified level.

Refer to page 5-19.

• Hydraulic oil is not warm

• Perform the warm-up.

enough

Refer to page 3-8.

• Air cleaner is clogged

• Clean the air cleaner.

Refer to page 5-34.

• Hydraulic oil is not of

• Replace the hydraulic oil.

suitable type

Refer to page 5-46.

Traveling is not possible or

• Stones or foreign objects

• Remove the foreign object.

not smooth

are stuck

Machine veers to the right/left

• Stones or foreign objects

• Remove the foreign object.

are stuck

• Faulty crawler tension

• Adjust the crawler to the

adjustment

prescribed tension.

Refer to page 5-26.

Travel speed cannot be

• Fuse is blown

• Replace the fuse.

changed

Refer to page 6-6.

6-10

TROUBLESHOOTING

OTHER SYMPTOMS

Symptoms

Major causes

Remedies

Slewing is not possible or not

• Insufficient grease on slew

• Grease the bearing.

smooth

bearing

Refer to page 5-28.

Hydraulic oil temperature is

• Hydraulic oil level too low

• Add up to the specified

too high

level.

Refer to page 5-19.

Starter motor turns but

• Insufficient fuel

• Add fuel.

engine does not start

Refer to page 5-18.

• Air in fuel system

• Bleed air.

Refer to page 6-8.

• Water in fuel system

• Drain water.

Refer to page 5-29.

Crawlers come off

• Crawlers too loose

• Increase the tension.

Refer to page 5-26.

Engine exhaust is white or

• Excessive engine oil

• Adjust to the specified level.

bluish

Refer to page 5-17.

• Poor fuel

• Replace the fuel.

Engine exhaust is

• Air cleaner is clogged

• Clean the air cleaner.

occasionally black

Refer to page 5-34.

Irregular noise is produced

• Low quality fuel is being

• Replace the fuel.

from the engine

used

(combustion or mechanical

• Engine is overheating

• Refer to “If the engine

noise)

overheats” on page 6-3.

• Damage inside the muffler

• Replace the muffler.

For replacement, ask your

sales or service dealer.

6-11

TROUBLESHOOTING

LOWERING THE BOOM TO THE GROUND

LOWERING THE BOOM TO

THE GROUND

If the hoe attachment must be lowered to the

ground while the engine is stopped, use the

following procedure.

This operation is dangerous and requires

experience. Ask your sales or service dealer

for it.

Procedure

2. Remove the cover (2).

3. Remove the cover (4). Remove the

harness of the auxiliary 3rd switch (3)

• Keep away from the working area when

together with the cover (4).

the hoe attachment is lowered. You may

be hit by dirt falling out of the bucket or

the hoe attachment as it drops.

• Gradually lower the boom slowly by

slowly turning the set screw on the

shut-off valve. Do not turn the screw

more than the specified amount.

4. Loosen the lock nut (5) while holding the

adjust screw (6) in place with a hexagonal

wrench so that the adjust screw (6) will not

be loosened together with the lock nut (5).

5. Turn the adjust screw (6) slowly 1/4 turn to

lower the boom.

6. Check for safety and stability of the

1. Remove the floor mat (1).

machine.

7. Return the adjust screw (6) to the original

position.

8. Tighten the lock nut (5) while holding the

adjust screw (6) in place with a hexagonal

wrench so that the adjust screw (6) will not

be loosened together with the lock nut (5).

· Lock nut (5) tightening torque: 12.4 to

13.6 N·m (9.1 to 10 ft-lb.)

· Adjust screw (6) tightening torque: 6.3 to

7.5 N·m (4.6 to 5.5 ft-lb.)

9. Reinstall the floor mat (1), cover (2), cover

(4) and the harness of the auxiliary 3rd

switch (3).

6-12

TROUBLESHOOTING

TOWING

Towing the machine

TOWING

Use the procedure described below to tow

heavy objects or the machine itself if it

should get stuck in the mud and not be able

When towing, serious injury or death

to get out on its own.

could result, if performed incorrectly or

the wire rope being used is inappropriate

or not properly inspected.

• It becomes dangerous if the wire rope

breaks or becomes disengaged. Use a

wire rope appropriate for the required

tractive force.

• Do not use a wire rope that is kinked,

twisted or otherwise damaged.

• Do not apply heavy loads abruptly to

the wire rope.

• Wear safety gloves when handling the

wire rope.

• Permissible forces: 23.2 kN (5208 lbf)

• Make sure there is an operator on the

machine being towed as well as on the

1. Attach the wire rope to the shackle (1).

machine that is towing.

2. Fasten the shackle (1) to the towing holes

• Never tow on slopes.

(2).

• Do not let anyone come near to the wire

3. Make sure that the wire rope is at a cone

rope while towing.

angle of 20° or less to the travel frame.

4. Move the machine to tension the wire

IMPORTANT: Do not tow a machine if its

rope.

engine does not start or if the machine

5. Operate the machine slowly and tow.

does not run. Doing so could damage the

machine being towed.

IMPORTANT: Be sure to follow the steps

below closely when using the towing hole

to tow. Failure to heed even one of the

steps may cause damage to the towing

hole or other parts of the frame.

6-13

TROUBLESHOOTING

IF THE CAB OR CANOPY IS DAMAGED

IF THE CAB OR CANOPY IS

DAMAGED

Immediately replace the damaged cab or

canopy. Serious injury or death may occur

if the machine is operated with damaged

cab/canopy.

Do not operate the machine until the

replacement is complete. Do not try to

repair the damaged cab or canopy by

welding. Doing so could endanger the

safety of the cab/canopy.

Canopy parts No.(1): 03384-00031

Canopy parts No.(2): 03384-00039

6-14

SPECIFICATIONS

BASIC SPECIFICATIONS

BASIC SPECIFICATIONS

Type

Canopy

MASS

Operating mass

kg (lb)

Rubber crawlers

1575 (3470)

PERFORMANCE

Heaped

0.038

(1.34)

Bucker capacity

m³ (cu. ft.)

(Standard bucket)

Struck

0.028

(0.99)

Slew speed

min^-1 (rpm)

9.2

(9.2)

1st

2.2

(1.37)

Travel speed

km/h (mph)

Rubber crawlers

2nd

4.2

(2.61)

Gradeability

(degrees)

30

Ground pressure

kPa (psi)

Rubber crawlers

26.2

(3.8)

Sound power level

LWA 93

Noise level

dB (A)

Sound pressure level

LpA 80

ENGINE

Manufacturer and model

Yanmar 3TNV70-PTB1R

Net (ISO 14396)

11.5/2400 (15.4/2400)

kW/min^-1 (hp/rpm)

Rated output

Net (ISO 9249/SAEJ 1349)

10.9/2400 (14.6/2400)

kW/min^-1 (hp/rpm)

Displacement

ml (cu.in.)

854 (52.1)

Starter

V-kW

12-1.0

Alternator

V-kW

12-0.48

Battery

V-A·h

12-38

7-2

SPECIFICATIONS

MACHINE DIMENSIONS

MACHINE DIMENSIONS

7-4

SPECIFICATIONS

MACHINE DIMENSIONS

Unit: mm (inch)

Item

Rubber crawlers

A

Overall length

3445 (135.6)

B

Upperstructure overall width

980 (38.5)

C

Overall height

2345 (92.2)

D

Slew radius

720 (28.3)

E

Clearance height under upperstructure

460 (18.1)

F

Crawler base

1155 (45.6)

G

Crawler overall length

1520 (59.9)

H

Crawler overall width (narrow)

980 (38.6)

H²

Crawler overall width (wide)

1300 (51.2)

J

Crawler shoe width

230 (9.1)

K

Ground clearance of undercarriage

205 (8.0)

L

Minimum radius of equipment and attachment

1450 (57.0)

M

Minimum radius of equipment at maximum front offset

1185 (46.7)

P

Offset distance of bucket (Left)

395 (15.6)

Q

Offset distance of bucket (Right)

555 (21.9)

R

Dozer blade width (narrow)

980 (38.6)

R²

Dozer blade width (wide)

1300 (51.2)

S

Dozer blade height

250 (9.8)

T

Front distance to axis of rotation

2725 (107.3)

U

Dozer blade distance to axis of rotation

855 (33.6)

V

Boom swing angle (Left)

70°

W

Boom swing angle (Right)

50°

X

Overall length (dozer blade at rear)

3585 (141.1)

7-5

SPECIFICATIONS

OPERATING RANGES

7-6

SPECIFICATIONS

OPERATING RANGES

Unit: mm (inch)

Item

Rubber crawlers

A

Maximum reach

3815 (150.2)

B

Maximum reach at ground reference plane

3760 (148.0)

C

Maximum digging depth

2190 (86.2)

D

Maximum vertical digging depth

1780 (70.1)

E

Reach at maximum vertical digging depth

2705 (106.5)

F

Maximum height of cutting edge

3430 (135.1)

G

Maximum dumping height

2400 (94.6)

H

Minimum dumping height

835 (32.9)

J

Dozer blade maximum lifting

215 (8.4)

K

Dozer blade maximum lowering

210 (8.3)

7-7

SPECIFICATIONS

LIFTING CAPACITIES

7-10

SPECIFICATIONS

LIFTING CAPACITIES

7-11

OPTIONS

GENERAL PRECAUTIONS

CAUTIONS WHEN OPERATING

• Slewing on slopes

ATTACHMENTS

• If there is a heavy attachment is

installed, the machine takes longer

distance than usual to come to a

complete stop when the stopping

Long attachments reduce stability of the

operation is performed. Carefully judge

machine. The machine may tip over if it

the distance so as not to bump into an

loses the balance when traveling or

object around the machine. Keep a safe

slewing on slopes.

distance from surrounding obstacles.

Never perform the operations listed below

When a heavy attachment is installed,

as they are extremely dangerous.

natural drop (the gradual dropping of

the attachment under its own weight

when it is stopped in midair) increases.

• The machine can tip over more easily in

the lateral direction than in the

longitudinal direction.

· Do not slew sideways with a heavy

load at the how attachment. In

particular, do not slew sideways on

slopes.

· The attachment is heavier for

machines equipped with breakers or

crushers than for machines equipped

• Traveling down the slopes with the

with the standard bucket. Do not

attachment raised

operate such machines sideways,

especially digging downhill.

• Traveling across slopes

8-3

OPTIONS

ATTACHMENT COMBINATION TABLE

ATTACHMENT COMBINATION TABLE

The table below shows which bucket should be installed when the machine is using a

standard arm or long arm. Select a proper bucket by following the table.

• Consult with Takeuchi before installing an optional attachment.

• Do not use any attachments not approved by Takeuchi. Doing so may cause safety

problems. Or, it may adversely affect the machine’s operation or service life.

• We will not be held responsible for any injuries, accidents or damage to its products

caused by the use by a non-approved attachment.

• The swing stopper must be mounted when a bucket wider than a 450W bucket is

mounted. Failure to mount the swing stopper may result in the bucket hitting the

machine body.

√ :Can be used.

∆ :Can be used only for light operations (digging and loading of dry and loose soil or mud)

— :Cannot be used.

Rated capacity

Bucket cutting width

Standard arm

Bucket

m³ (cu. yd.)

mm (inch)

930mm (37 in.)

260W

0.020

(0.026)

265 (10.4)

√

350W

0.027

(0.035)

335 (13.2)

√

450W (Standard)

0.038

(0.049)

435 (17.1)

√

500W

0.043

(0.056)

485 (19.1)

√

3-hole bucket

0.049

(0.064)

457 (18.0)

—

Total bucket weight = Within 116 (255 lb.)

Within 485 (19.1)

√

Hydraulic Breaker (TKB-72)

√

8-4

OPTIONS

SELECTING A LEVER PATTERN

SELECTING A LEVER PATTERN

The operating pattern of the left and right operating levers can be changed.

Before starting the engine, check the selector to see which operating pattern the left

and right operating levers are set.

SWITCHING THE LEVER PATTERN

1. Park the machine on a flat and rigid

ground, and stop the engine.

2. Open the maintenance cover A.

3. Loosen the wing bolt (1).

4. Turn the selector valve lever (2) to switch

the pattern.

5. Tighten the wing bolt (1) and fasten the

lever (2) in place.

6. Close the maintenance cover A.

7. Confirm the lever pattern.

(A) : ISO pattern

(G) : G pattern

8-5

OPTIONS

HYDRAULIC BREAKER

Cautions on operating

HYDRAULIC BREAKER

For handling of the breaker, read the

hydraulic breaker’s manual, provided

separately.

• Start the engine and run it at 75% of the

maximum speed.

Do not use the breaker when the crawler

width is narrowed!

• Always operate the machine with the

crawler width extended to 1300 mm

(51.2 in.) to maximize the machine

stability. If the machine is operated with

the crawler width narrowed (980 mm,

38.6 in.), the machine may tip over due

to its poor stability.

• Pound with the chisel pressed

• If the machine must be operated with

perpendicular to the surface to be

the narrowed crawler width (980 mm,

pounded.

38.6 in.), traveling should be done after

• When pounding, press the chisel properly

folding the hoe attachment, lowering the

against the object to be broken so as to

boom to lower the center of gravity and

avoid pounding the air.

keeping the machine facing forward.

When an optional attachment, such as a

breaker, tilted bucket or clamshell, is

operated, be sure that the crawler width is

extended to 1300 mm (51.2 in.).

IMPORTANT: When installing an

attachment, make sure that it is

appropriate for the machine being used.

Contact your sales or service dealer for

advice on selecting attachments.

• Do not pry with the chisel or do not pry

while pounding.

• Do not move the chisel while pounding.

• Do not pound continuously for over 30

seconds on the same surface.

8-6

OPTIONS

HYDRAULIC BREAKER

REPLACING THE HYDRAULIC OIL

REGULARLY

When a hydraulic breaker is used, the oil

deteriorates more quickly than that used for

a usual operation. Be sure to replace the

hydraulic oil and the return filter elements.

• Failure to replace these in time can lead to

damage to the machine and the breaker

hydraulic system. To improve the service

life of the hydraulic systems, be sure to

• Do not pound with the cylinder fully

replace the hydraulic oil and return filter

extended or retracted (at the stroke end).

element after the number of hours shown

Leave a margin of at least 50mm(2 in).

on the diagram below.

• When replacing the hydraulic oil, clean the

suction strainer.

Replacement interval (hours)

Item

Hydraulic oil

Filter element

1st time

—

25

2nd time

—

100

Periodically

1200 (600)

200

• Do not pound with the arm placed

When the breaker operating ratio is 100%.

perpendicular to the ground surface.

• Do not drop the breaker itself on the object

to be broken in order to break it.

• Do not move objects to be broken or rocks

with the breaker itself.

• Slew the machine occasionally to cool the

engine.

• If a hydraulic hose is vibrating abnormally,

(

): When using conventional antiwear

nitrogen gas may be leaking from the

hydraulic oil.

accumulator. Ask for an inspection early.

8-7

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