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Takeuchi Hydraulic Excavator TB285 (No.185000001~), TB290 (No.190000001~). Operator's Manual - page 6

Maintenance

When required

Replacing the rubber crawlers

Removal

Warning

• If you must work beneath the raised

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

1. Start the engine and raise the machine

other.

body with the hoe attachment and the

· One person must sit in the operator’s

dozer blade.

seat so that he/she can immediately

2. Stop the engine.

stop the engine when necessary. He/

she must take care not to touch the

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.

IMPORTANT: When replacing the crawler

belts, replace the right and left belts at

the same time.

IMPORTANT: When the travel speed

button is set to the 2nd speed side while

3. Remove the valve cover (1) at the center

the engine is running, the tensioning

of one of the crawler frames.

cylinder rods extend and the crawler belt

4. Turn the plug (2) counterclockwise and

tension is increased. Keep the engine at

remove it.

the 1st speed when replacing. Do not set

5. Turn the stem (3) counterclockwise with a

to the 2nd unless for increasing tension.

hex wrench to completely loosen the

tension of the crawler.

Note: This machine uses a hydraulic cylinder

6. Once the crawler belt is completely loose,

to adjust the tension of the crawler belts. It is

tighten the stem (3) until it is firm.

not necessary to regularly perform

· Tightening torque: 18.6 to 21.6 N·m

adjustments of the crawler belt tension.

(13.7 to 15.9 ft-lb.)

7. Tighten the plug (2).

· Tightening torque: 18.6 to 21.6 N·m

(13.7 to 15.9 ft-lb.)

8. Do the same for the other side.

5-66

Maintenance

When required

9. Slowly lower the dozer blade side of the

6. For rubber crawlers, move the machine so

machine body. (Do not start the engine.)

that the “M” or “∞” mark at the joint is at

10. Lower the machine body until the

the top center of the crawler frame.

crawlers contact the ground with the

maximum slack.

11. When the crawlers are disengaged from

the idlers, slide the crawlers to the

outside and remove them.

12. Remove the crawlers from the sprockets,

and then remove the crawlers from the

crawler frames.

Installation

1. Engage the crawlers around the left and

right sprockets.

2. Set the left and right crawlers on the

7. Inspect the gap (A or B) between the

idlers.

bottom surface of the frame at the center

3. Start the engine.

of the crawler frame and the top surface of

4. Press the travel speed button once to set

the crawler.

it to the 2nd speed side. The left and right

The gap (A or B) must be within the

crawler belts are tightened simultaneously.

following range:

(A)

Rubber crawler

160 to 180 mm (6.3 to 7.1 in.)

(B)

Steel crawler

260 to 280 mm (10.2 to 11.0 in.)

(B)

Rubber pads

245 to 265 mm (9.6 to 10.5 in.)

Note: When the self-adjusting shoe tension

system is properly working, the shoe should

have the gap (A or B) as described above, at

the time of installation.

5. Check that the crawler belts are properly

When the machine is lowered and driven in

tightened.

2nd speed, the crawler belts will be

stretched to the correct tension. The values

of shoe tension (gap values) after the 2nd

speed travel are different from those

described above.

5-67

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.

• The arm retracting speed momentarily

slows down when it reaches an almost

vertical position while the engine is running

at low speed.

• 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

Warning

engine hood.

• Do not open the engine hood when

3. If there is steam, stop the engine

steam is coming from it. The steam or

immediately and contact your sales or

hot water may spurt out and cause

service dealer for repair. If steam, is not

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 5-24.

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 5-39.

· Sediment in cooling system

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

Refer to page 5-48.

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.

Warning

• 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

Protected

Protected

Capacity

Capacity

system does not work, a fuse may be blown.

circuit

circuit

Inspect the fuses.

15A

ECM (ACC)

25A

Light

Inspecting and replacing the fuse

Starter switch

10A

10A

Wiper

(C)

Warning

5A

Controller (B)

20A

Solenoid

If the fuse blows again soon after

Horn, interior

Controller

10A

10A

replacement, then the electric system is

light

(ACC)

likely faulty. It may pose a fire hazard if

Cigarette

not properly repaired. Contact your sales

20A

lighter, radio,

or service dealer for advice.

beacon lamp

10A

Alarm

1. Turn the starter key to the OFF position to

stop the engine.

Air conditioner

25A

blower

Air conditioner

10A

compressor

Air conditioner

5A

controller

25A

Option (1)

15A

Option (2)

25A

Option (3)

2. Open the fuse box cover (1).

3. Check for any blown fuses (2).

4. 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 side cover and inspect it. If the

fusible link is blown, 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

2. Loosen the vent plug (5) of the main fuel

Restarting after adding

filter (2).

fuel

Bleeding air from the fuel system

3. Turn the starter key to the ON position and

wait for the air to be bled from the vent

AM1B0041

plug (5).

1. Add fuel.

4. Retighten the vent plug (5) when air

bleeding is finished and fuel starts leaking

<TB285>

out from around the vent plug (5).

5. Turn and hold the starter key to the ON

position for three minutes before turning it

back to the OFF position.

Note: Air in the fuel system causes the

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. 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.

<TB290>

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

Vehicle and

There is a problem in the machine.

engine

Refer to the respective warning lamp below.

emergency

Get the vehicle or engine error code number from the

lamp

multi-data display and consult your sales or service

dealer referring to the number on the “Vehicle error code

list” or “Engine error code list”.

Refer to “Vehicle error code list” on page 6-12.

Refer to “Engine error code list” on page 6-14.

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

5-24.

Engine oil

There is a problem in the engine lubrication system.

pressure

warning lamp

Check the engine oil level. If the lamp is flashing when

the level is normal or even after replenishment of oil or

coolant, 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.

6-10

Troubleshooting

If a warning lamp flashes

Warning lamp

Lamp name

Causes and remedies

Air cleaner

The air cleaner is clogged. Clean it.

warning lamp

Refer to “Cleaning the air cleaner” on page 5-38.

Water

Water is in the water separator. Drain water.

separator

Refer to “Draining the water from the water separator” on

warning lamp

page 5-63.

Third auxiliary

Pressure in the third auxiliary hydraulic line is too low

hydraulic

warning lamp

Consult your sales or service dealer for help.

Overload

This lamp starts flashing if the overload warning device is

warning lamp

activated. If it occurs, reduce the load to be lifted.

Refer to “Overload warning device” on page 2-53.

6-11

Troubleshooting

Vehicle error code list

Vehicle error code list

When the multi-data display is set to the data mode, the number that is corresponding to the

error, if applicable, appears in the error code field. Up to four types of error codes are

displayed (the leftmost code is the most recent error). If this occurs, consult your sales or

service dealer for help.

Error code

Error details

102

CAN communication error (BusOff)

902

CAN communication error (ECM)

1002

CAN communication error (cluster gauge)

1703

Power supply voltage error (too high)

1704

Power supply voltage error (too low)

1720

Proportional amplifier system abnormality

3300

Alternator charge faulty

3401

Engine oil pressure error

3500

Overheat

3600

Air cleaner clogged

3700

Water separator

3800

Hydraulic oil filter clogged

5303

Accelerator sensor error (too high)

5304

Accelerator sensor error (too low)

5603

Lift alarm sensor error (cable break)

5604

Lift alarm sensor error (short circuit)

6-12

Troubleshooting

Vehicle error code list

Error code

Error details

6513

AUX1 slide switch neutral error

6613

AUX2 slide switch neutral error

6503

AUX1 slide switch voltage value error (too high)

6504

AUX1 slide switch voltage value error (too low)

6603

AUX2 slide switch voltage value error (too high)

6604

AUX2 slide switch voltage value error (too low)

6731

AUX3 input error

6813

AUX1 button A error

6913

AUX1 button B error

7106

Pump PWM output electric current error (short circuit)

7105

Pump PWM output electric current error (open)

7206

AUX1 (L) PWM output electric current error (short circuit)

7205

AUX1 (L) PWM output electric current error (open)

7306

AUX1 (R) PWM output electric current error (short circuit)

7305

AUX1 (R) PWM output electric current error (open)

7406

AUX2 (L) PWM output electric current error (short circuit)

7405

AUX2 (L) PWM output electric current error (open)

7506

AUX2 (R) PWM output electric current error (short circuit)

7505

AUX2 (R) PWM output electric current error (open)

PWM = Pulse width modulation

6-13

Troubleshooting

Engine error code list

Engine error code list

When the engine error code is displayed on the multi-data display, the number that is

corresponding to the error, if applicable, appears in the error code field. Up to three types of

error codes are displayed, with the latest code at the top. If this occurs, consult your sales or

service dealer for help.

<TB285>

Error code

Error details

SPN

FMI

4

Engine Fuel Rack Position Sensor: Shorted to low source

1210

3

Engine Fuel Rack Position Sensor: Shorted to high source

4

Barometric Pressure Sensor: Shorted to low source

108

3

Barometric Pressure Sensor: Shorted to high source

2

Barometric Pressure Sensor: Intermittent fault

4

E-ECU Internal Temperature Sensor: Shorted to low source

3

E-ECU Internal Temperature Sensor: Shorted to high source

1136

2

E-ECU Internal Temperature Sensor: Intermittent fault

0

E-ECU Internal Temperature: Too high

4

Engine Coolant Temperature Sensor: Shorted to low source

3

Engine Coolant Temperature Sensor: Shorted to high source

110

2

Engine Coolant Temperature Sensor: Intermittent fault

0

Engine Coolant Temperature: Too high

4

Sensor 5V: Shorted to low source

1079

3

Sensor 5V: Shorted to high source

2

Sensor 5V: Intermittent fault

1

System Voltage: Too low

158

0

System Voltage: Too high

1078

4

Engine Fuel Injection Pump Speed Sensor: Shorted to low source

522402

4

Auxiliary Speed Sensor: Shorted to low source

4

Engine Fuel Rack Actuator Relay: Circuit fault A

3

Engine Fuel Rack Actuator Relay: Circuit fault B

522241

7

(Reserved)

2

Engine Fuel Rack Actuator Relay: Intermittent fault

4

Air Heater Relay: Circuit fault A

522243

3

Air Heater Relay: Circuit fault B

2

Air Heater Relay: Intermittent fault

4

Cold Start Device: Circuit fault A

522242

3

Cold Start Device: Circuit fault B

2

Cold Start Device: Intermittent fault

4

EGR Stepping Motor “A”: Circuit fault A

522251

3

EGR Stepping Motor “A”: Circuit fault B

4

EGR Stepping Motor “B”: Circuit fault A

522252

3

EGR Stepping Motor “B”: Circuit fault B

4

EGR Stepping Motor “C”: Circuit fault A

522253

3

EGR Stepping Motor “C”: Circuit fault B

4

EGR Stepping Motor “D”: Circuit fault A

522254

3

EGR Stepping Motor “D”: Circuit fault B

6-14

Troubleshooting

Engine error code list

<TB285>

Error code

Error details

SPN

FMI

4

Oil Pressure Switch: Shorted to low source

100

1

Oil Pressure: Too low

4

Battery Charge Switch: Shorted to low source

167

1

Charge warning

522314

0

Engine Coolant Temperature: Abnormal temperature

522323

0

Air Cleaner: Mechanical malfunction

522329

0

Oily Water Separator: Mechanical malfunction

190

0

Engine speed: Overspeed condition

4

Engine Fuel Rack Actuator: Shorted to low source

3

Engine Fuel Rack Actuator: Shorted to high source

638

7

Engine Fuel Rack Actuator: Mechanical malfunction

2

Engine: Malfunction

639

12

High-speed CAN Communication: Communication fault

2

E-ECU internal fault: EEPROM checksum error (Data Set 2)

630

12

E-ECU internal fault: EEPROM read/write fault

12

E-ECU internal fault: Flash ROM checksum error (Main software)

628

2

E-ECU internal fault: Flash ROM checksum error (Data Set 1)

2

E-ECU internal fault: Flash ROM checksum error (Data Set 2)

1485

4

E-ECU Main Relay: Shorted to low source

12

E-ECU internal fault: Sub-CPU error A

522727

12

E-ECU internal fault: Sub-CPU error B

12

E-ECU internal fault: Sub-CPU error C

522728

12

E-ECU internal fault: Engine Map Data Version Error

12

Immobilizer: CAN communication fault

522730

8

Immobilizer: Pulse communication fault

1202

2

Immobilizer: System fault

6-15

Troubleshooting

Engine error code list

<TB290>

Error code

Error details

SPN

FMI

3, 4

Coolant temp sensor failure

110

0

Engine overheat

3, 4

C. Rail press. sensor failure

2

C. Rail press. too hi

157

0

C. Rail press. hi 1

0

C. Rail press. hi 2

172

3, 4

Intake air temp sensor failure

174

3, 4

Fuel temp sensor failure

190

0

Engine overspeed

628

2

ROM error

633

7

Pressure limiter open

2

Cam sensor failure

636

7

Cam-Crank phase error

2

CAN BusOff error

639

3

CAN timeout error

651

3

Injector #1 failure

652

3

Injector #2 failure

653

3

Injector #3 failure

654

3

Injector #4 failure

655

3

Injector #5 failure (for 6cyl. ENG)

656

3

Injector #6 failure (for 6cyl. ENG)

675

3

Glow lamp failure

676

3

Glow relay failure

677

3

Starter cut relay failure

6-16

Troubleshooting

Engine error code list

<TB290>

Error code

Error details

SPN

FMI

723

2

Crank sensor failure

968

2

Idle up/down switch failure

987

3

Check engine lamp failure

1077

2

CPU error

1079

2

5V power system 1 failure

1080

2

5V power system 2 failure

1239

1

Pump press low (fuel leak)

1347

0

SCV failure

1381

3, 4

Clogged fuel filter failure

1485

2

Main relay failure

10001

3

EGR sensor failure

10002

2

EGR valve failure

10003

2

Injector com 1 failure

10004

2

Injector com 2 failure

10005

1

Charge circuit 1 failure

10006

1

Charge circuit 2 failure

10007

2

Sub CPU error

10008

2

A/D converter failure

10009

2

5V power system 3 failure

10010

2

5V power system 4 failure

10011

2

5V power system 5 failure

10012

2

12V power system failure

10013

2

EEPROM error

6-17

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 5-64.

levers

Travel levers, blade lever and

• Insufficient grease on travel

• Grease the levers and

pedals do not move smoothly

levers, blade lever and

pedals.

pedals

Refer to page 5-64.

Operation of hoe attachment,

• Safety lock lever is raised

• Lower (release) the safety

dozer blade, auxiliary

(locked)

lock lever.

hydraulics, slewing or

Refer to page 2-31.

traveling is not possible.

• Fuse is blown

• Replace the fuse.

Refer to page 6-6.

Digging force is insufficient

• Hydraulic oil level too low

• Add to the specified level.

Refer to page 5-20.

• 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 5-38.

• Hydraulic oil is not of

• Replace the hydraulic oil.

suitable type

Refer to page 5-54.

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

• Crawler belt tension is

• Check and adjust (ask your

faulty.

sales or service dealer).

Refer to page 5-28.

Travel speed cannot be

• Fuse is blown

• Replace the fuse.

changed

Refer to page 6-6.

6-18

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 5-30.

Hydraulic oil temperature is

• Hydraulic oil level too low

• Add up to the specified

too high

level.

Refer to page 5-20.

Starter motor turns but

• Insufficient fuel

• Add fuel.

engine does not start

Refer to page 5-19.

• Air in fuel system

• Bleed air.

Refer to page 6-8.

• Water in fuel system

• Drain water.

Refer to page 5-31.

Crawlers come off

• Crawlers too loose

• Check and adjust (ask your

sales or service dealer).

Refer to page 5-28.

• Tensioning cylinder valve is

• Increase the tension.

loose.

Refer to page 5-29.

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 5-38.

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.

6-19

Troubleshooting

Lowering the boom to the ground

• Do not loosen or remove the hoses not

Lowering the boom to

located in the specified places. Oil may

spurt out if wrongly handled.

the ground

If the hoe attachment must be lowered to the

ground while the engine is stopped, use the

following procedure.

Procedure 1 (when engine can be started)

Perform this operation within 10 minutes

after the engine stopping.

1. Sit at the operator’s seat.

2. Turn the starter switch to the ON position.

3. Lower the safety lock lever to the unlock

position

4. Slowly push the operating lever forward to

lower the boom.

2-Piece boom

Procedure 2 (when engine cannot be

started)

This operation is dangerous and requires

experience. Ask your sales or service dealer

for it.

Warning

• Stop the engine and allow the machine

to cool down before performing

maintenance.

· The engine and the hydraulic system

and many other parts of the machine

1. Place a pan under the hose to catch the

are hot immediately after the engine is

waste oil.

stopped. Touching these parts will

2. Hold the hose fitting (1) with a wrench and

cause burns.

loosen the hose nut (2) with another

· The hydraulic oil is also hot and under

wrench.

high pressure immediately after the

3. The oil in the boom cylinder is drained and

engine is stopped.

the hoe attachment is lowered.

Be careful when loosening the caps or

4. After the hoe attachment is lowered to the

plugs. Working on the machine under

ground, check the safety and stability of

these conditions could result in burns

the machine.

or injuries due to the hot oil spurting

5. Hold the hose fitting (1) with a wrench and

out.

tighten the hose nut (2) with another

• Keep away from the working area when

wrench.

the hoe attachment is lowered. You may

· Tightening torque: 24.5 to 29.4 N·m

be hit by dirt falling out of the bucket or

(18.1 to 21.7 ft-lb.)

the hoe attachment as it drops.

• Stand in a position away from danger of

lowering boom and loosen the hose nut.

Otherwise, you could be hit by the

boom.

6-20

Troubleshooting

Towing

Towing the machine

Towing

Use the procedure described below to tow

heavy objects or the machine itself if it

Warning

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.

• Maximum tractive force: 125.2 kN (28146

• Make sure there is an operator on the

lbf)

machine being towed as well as on the

machine that is towing.

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

• Never tow on slopes.

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

• Do not let anyone come near to the wire

(2).

rope while towing.

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

angle of 20° or less to the travel frame.

IMPORTANT: Do not tow a machine if its

4. Move the machine to tension the wire

engine does not start or if the machine

rope.

does not run. Doing so could damage the

5. Operate the machine slowly and tow.

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.

6-21

Specifications

Basic Specifications

Basic Specifications

<TB285>

Type

Mono boom

2-Piece boom

Mass

Rubber crawlers

8465 (18660)

8670 (19120)

Operating mass

kg (lb)

Steel crawlers

8700 (19185)

8905 (19635)

Performance

Heaped

0.245

(8.65)

Bucker capacity

m³ (cu. ft.)

(Standard bucket)

Struck

0.185

(6.53)

Slew speed

min^-1 (rpm)

10.3

(10.3)

1st

2.6

(1.62)

Rubber crawlers

2nd

5.0

(3.11)

Travel speed

km/h (mph)

1st

2.5

(1.55)

Steel crawlers

2nd

4.8

(2.98)

Gradeability

(degrees)

35

Rubber crawlers

37.9

(5.5)

38.8

(5.63)

Ground pressure

kPa (psi)

Steel crawlers

39.4

(5.72)

40.3

(5.85)

Sound power level

LWA 99

Noise level

dB (A)

Sound pressure level

LpA 74

Engine

Manufacturer and model

Yanmar 4TNV98T-ZXWTB2

Rated output

kW/min^-1 (hp/rpm)

49.6/2000 (66.5/2000)

Displacement

ml (cu.in.)

3318 (202.5)

Starter

V-kW

12-3.0

Alternator

V-kW

12-0.96

Battery

V-A·h

12-72

7-2

Specifications

Basic Specifications

<TB290>

Type

Mono boom

2-Piece boom

Mass

Rubber crawlers

8515 (18770)

8720 (19230)

Operating mass

kg (lb)

Steel crawlers

8750 (19295)

8955 (19745)

Performance

Heaped

0.245

(8.65)

Bucker capacity

m³ (cu. ft.)

(Standard bucket)

Struck

0.185

(6.53)

Slew speed

min^-1 (rpm)

10.3

(10.3)

1st

2.6

(1.62)

Rubber crawlers

2nd

5.0

(3.11)

Travel speed

km/h (mph)

1st

2.5

(1.55)

Steel crawlers

2nd

4.8

(2.98)

Gradeability

(degrees)

35

Rubber crawlers

38.1

(5.53)

39.0

(5.66)

Ground pressure

kPa (psi)

Steel crawlers

39.6

(5.74)

40.5

(5.87)

Sound power level

LWA 99

Noise level

dB (A)

Sound pressure level

LpA 74

Engine

Manufacturer and model

ISUZU AU-4JJ1TYSB-03

Rated output

kW/min^-1 (hp/rpm)

51.4/2000 (68.9/2000)

Displacement

ml (cu.in.)

2999 (183)

Starter

V-kW

12-2.5

Alternator

V-kW

12-1.32

Battery

V-A·h

12-72

7-3

Specifications

Machine dimensions

Machine dimensions

Mono boom

7-4

Specifications

Machine dimensions

<TB285/TB290>

Mono boom

Unit: mm (inch)

Standard arm

Middle arm

Long arm

Item

Rubber crawlers

A

Overall length

6530 (257.1)

6575 (258.9)

6660 (262.3)

B

Upperstructure overall width

2140 (84.3)

2565 (100.9)

C

Overall height

2560 (100.8)*

D

Slew radius

1650 (65)

785 (30.9)

E

Clearance height under upperstructure

760 (29.9)*

2210 (87)

F

Crawler base

2180 (85.8)*

2855 (112.4)

G

Crawler overall length

2830 (111.4)*

H

Crawler overall width

2200 (86.6)

J

Crawler shoe width

450 (17.7)

385 (15.1)

K

Ground clearance of undercarriage

360 (14.2)*

Minimum radius of equipment and

L

2240 (88.2)

2360 (92.9)

2495 (98.2)

attachment

Minimum radius of equipment at

M

1810 (71.3)

1910 (75.3)

2030 (79.9)

maximum front offset

P

Offset distance of bucket (Left)

845 (33.3)

Q

Offset distance of bucket (Right)

730 (28.7)

R

Dozer blade width

2200 (86.6)

S

Dozer blade height

500 (19.7)

T

Front distance to axis of rotation

4890 (192.5)

4935 (194.3)

5020 (197.7)

2055 (80.9)

U

Dozer blade distance to axis of rotation

2060 (81.1)*

V

Boom swing angle (Left)

70°

W

Boom swing angle (Right)

60°

X

Overall length (dozer blade at rear)

6945 (273.4)

6990 (275.1)

7075 (278.6)

*: With steel crawlers

7-5

Specifications

Machine dimensions

2-Piece boom

7-6

Specifications

Machine dimensions

<TB285/TB290>

2-Piece boom

Unit: mm (inch)

Item

Rubber crawlers

A

Overall length

6550 (257.8)

B

Upperstructure overall width

2140 (84.3)

2565 (100.9)

C

Overall height

2560 (100.8)*

D

Slew radius

1650 (65)

785 (30.9)

E

Clearance height under upperstructure

760 (29.9)*

2210 (87)

F

Crawler base

2180 (85.8)*

2855 (112.4)

G

Crawler overall length

2830 (111.4)*

H

Crawler overall width

2200 (86.6)

J

Crawler shoe width

450 (17.7)

385 (15.1)

K

Ground clearance of undercarriage

360 (14.2)*

L

Minimum radius of equipment and attachment

2580 (101.6)

M

Minimum radius of equipment at maximum front offset

2105 (82.9)

P

Offset distance of bucket (Left)

850 (33.4)

Q

Offset distance of bucket (Right)

730 (28.7)

R

Dozer blade width

2200 (86.6)

S

Dozer blade height

500 (19.7)

T

Front distance to axis of rotation

4910 (193.2)

2055 (80.9)

U

Dozer blade distance to axis of rotation

2060 (81.1)*

V

Boom swing angle (Left)

70°

W

Boom swing angle (Right)

60°

X

Overall length (dozer blade at rear)

6960 (274.1)

*: With steel crawlers

7-7

Specifications

Operating ranges

Operating ranges

Mono boom

7-8

Specifications

Operating ranges

<TB285/TB290>

Mono boom

Unit: mm (inch)

Standard arm

Middle arm

Long arm

Item

Rubber crawlers

A

Maximum reach

7105 (279.6)

7275 (286.3)

7435 (292.7)

Maximum reach at ground reference

B

6950 (273.6)

7125 (280.5)

7290 (287.0)

plane

C

Maximum digging depth

4220 (166.1)

4400 (173.2)

4570 (179.9)

D

Maximum vertical digging depth

3455 (136.1)

3635 (143.1)

3805 (149.9)

Reach at maximum vertical digging

E

4685 (184.4)

4720 (185.8)

4755 (187.1)

depth

F

Maximum height of cutting edge

7045 (277.3)

7175 (282.5)

7305 (287.5)

G

Maximum dumping height

5010 (197.2)

5140 (202.4)

5270 (207.4)

H

Minimum dumping height

1960 (77.2)

1795 (70.7)

1650 (65.0)

J

Dozer blade maximum lifting

520 (20.4)

K

Dozer blade maximum lowering

490 (19.3)

*: With an angle dozer blade

7-9

Specifications

Operating ranges

2-Piece boom

7-10

Specifications

Operating ranges

<TB285/TB290>

2-Piece boon

Unit: mm (inch)

Item

Rubber crawlers

A

Maximum reach

7700 (303.1)

B

Maximum reach at ground reference plane

7560 (297.6)

C

Maximum digging depth

4445 (175)

D

Maximum vertical digging depth

4015 (158.1)

E

Reach at maximum vertical digging depth

4045 (159.3)

F

Maximum height of cutting edge

7980 (314.2)

G

Maximum dumping height

6005 (236.4)

H

Minimum dumping height

2310 (90.9)

J

Dozer blade maximum lifting

520 (20.4)

K

Dozer blade maximum lowering

490 (19.3)

*: With an angle dozer blade

7-11

Specifications

Lifting Capacities

Standard arm <TB285>

7-14

Specifications

Lifting Capacities

Standard arm <TB285>

7-15

Specifications

Lifting Capacities

Middle arm <TB285>

7-16

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