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Doosan DX255LC. Operation and Maintenance Manual (2006) - page 3

CD Player (Optional)

AST/DIR

FG000109

Figure 123

Operating Controls

OP000482

2-56

MISCELLANEOUS ELECTRICAL

DEVICES

Cabin Light

A light is installed on the top of the operator's compartment.

The light will work despite starter switch position.

NOTE:

If light is left "ON" for a long time while the engine is

not running, the battery will be discharged.

FG000417

Figure 124

Pilot Cutoff Switch

When the safety lever is put into the "LOCK" position, the

switch deactivates the work and travel levers. With the work

and travel levers deactivated, no digging/operational work

can be done.

FG000211

Figure 125

Circuit Breaker

A main circuit breaker is in the battery box. It will

automatically cut off in case of an electrical short circuit or

overload. This will prevent the electric wiring and

components from being burned or damaged.

If the circuit breaker is cut off, check all related circuits, this

means something is wrong in the electric circuit.

After maintenance, press the red button for normal operation

of circuit breaker.

HAAE2110

Figure 126

OP000482

Operating Controls

2-57

Fusible Link

A fusible link is in the battery box.

A

If the engine does not crank, first check that the starter

switch is turned "ON" and that no power is available (No

indicator lights will light.). Check that the "A" portion (Figure

127) of the fusible link is not broken or burned through.

Replace the fusible link if damage and investigate cause.

HAAE2120

WARNING!

Figure 127

When changing the fusible link, replace the fusible link

with the same capacity part. Otherwise, a fire could

break out in the wiring harness and/or other components

of the circuit. Always use original DOOSAN parts.

Fuse Boxes

There are two fuse boxes (Figure 128) on the left side of

the heater box. The fuses prevent electrical devices from

overloading or shorting.

A decal attached to the inside of the fuse box access cover

indicates the function and amperage of each fuse.

NOTE:

For a further explanation see “Fuse Boxes” on

page 4-73.

Spare fuses are mounted on the inside of fuse box access

FG000110

cover.

Figure 128

Change a fuse if the element separates. If the element of a

new fuse separates, check the circuit and repair the circuit.

CAUTION!

Always replace fuses with the same type and capacity

fuse that was removed. Otherwise, electrical damage

could result.

Operating Controls

OP000482

2-58

SEAT ADJUSTMENT

WARNING!

Adjust the seat position before starting operations or

after changing the operator.

Always fasten your seat belt while operating machine.

Adjust the seat so that the control levers and pedals

can be operated freely and easily with the operator back

against the backrest.

1. Forward / Backward Adjustment

Holding lever (1, Figure

129), raise it up, move the

seat to the desired position. Release lever to lock the

seat in the selected position. Adjustment range is

200 mm (7.9 in).

4

2

2. Seat Tilt and Height Adjustment

1

3

FG000183

Forward Tilt

Figure 129

Push lever (2, Figure 129) down to adjust the angle of

the front of the seat. There are four positions that it

can be set at.

Rear Tilt

Pull lever (2, Figure 129) up to adjust the angle of the

rear of the seat. There are four positions that it can be

set at.

Seat Height

It is possible to move the seat up or down by

combining adjustments forward and rear tilt. Adjust the

seat according to operator's size and work conditions.

Height adjustment is 60 mm (2.4 in).

3. Suspension Adjustment

Turning knob

(3, Figure

129) to right makes the

suspension harder. Turning knob to left makes the

suspension softer. Adjust according to operator's weight

by checking the weight indicator dial. Adjustment range

is from 50 - 120 kg (110 - 265 lb).

OP000482

Operating Controls

2-59

4. Reclining Position Adjustment

Pulling up the right lever (4,Figure 129) allows the seat

backrest to be moved forward or backward.

Sit with your back against the seat back when

adjusting it. If your back is not touching the seat back,

the seat back may suddenly move forward.

5. Armrest Angle Adjustment

The angle of each armrest can be adjusted by turning

7

a dial

(5, Figure

130) on bottom of armrest. When

adjusting the angle, manually raise the armrest before

9

turning the dial.

5

8

6

6. Lumbar Support Adjustment

A lumbar support is located in the seat back.

Turn the dial

(6, Figure

130) counterclockwise to

FG000778

increase the force of the lumbar support

Figure 130

7. Headrest

The headrest (7, Figure 130) can be adjusted forward/

backward and up/down. Move it by holding both sides.

8. Seat Belt

WARNING!

The seat belt is for the operator's safety and

should always be worn. Before driving the machine,

adjust the seat to the desired position for maximum

comfort and machine control, then fasten the seat

belt. Seat belts must be worn across the pelvic

region and adjusted snugly to lessen the chance

and severity of injury in case of an accident. Never

fasten a seat belt across the abdomen.

Under no circumstances should the operator be

standing in the cabin when operating the excavator.

Do not adjust the seat position while the vehicle is

moving because a loss of control may result. Stop

the machine, apply the parking brake, and then

adjust the seat.

Always, check the condition of seat belt and belt

bracket before fastening it. Do not use it with twists

in it. Replace belt or bracket if damaged or worn.

Operating Controls

OP000482

2-60

Seat Belt Locking and Unlocking

Insert belt end (1, Figure 131) into the buckle (2). Pull

the belt to check that belt end is locked into buckle.

Adjust belt length so that it comfortably tight against

the operator's pelvic region (hipbone).

HAOB140L

Figure 131

Press the button (3, Figure 132) in the center of buckle

(2) and pull out belt (1) to unlock.

HAOB150L

Figure 132

9. Seat Back-pocket

The seat has a seat back pocket. It is used for storing

the operation and maintenance manual.

10. Left and Right Control Stand

Adjustment

For operator's convenience, the right and left control

stands and seat can slide together, within a 160 mm

(6.3 in) forward or backward travel distance.

11

Holding lever (10, Figure 133), raise it up, set the seat

to desired position. Release lever to lock the seat in

10

the selected position.

FG000185

Figure 133

11. Left and Right Control Stand Height

Adjustment

The left and right dials (11, Figure 133) at the lower

part of the seat can be turned to adjust the elevation

height of each control stand.

It can be used to adjust the height of the control

joystick.

OP000482

Operating Controls

2-61

12. Air Suspension Seat (Optional)

12

The operator seat is also available with air suspension

for even better comfort. The switch (12, Figure 134) in

the middle of the seat can be used to adjust the air

cushion. If the switch is pressed, the seat become

harder, and pulling it out makes the seat softer, when

the air is bleed out.

FG000187

Figure 134

13. Heating the Operator's Seat

(Optional)

O

The air suspension seat can be heated. The switch on

I

the left control stand is used to warm the seat. When

heating is not needed or seat is warmed, turn the

switch to "OFF" position.

FG000034

Figure 135

Operating Controls

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2-62

CEILING COVER

NOTE:

If the machine is equipped with the optional

transparent ceiling cover never use any chemical

cleaners on its surface. Only use warm water to wash

dust and dirt from its surfaces, and after that, dry it

with a soft fabric towel.

Opening the Ceiling Cover

FG000189

1.

Lower bucket to ground.

Figure 136

2.

Set safety lever (Figure 136) on "LOCK."

3.

Pull the lock (1, Figure 137) in front center of ceiling

cover and push it up with handle.

Closing the Ceiling Cover

1.

Lower bucket to ground.

2.

Set safety lever (Figure 136) on "LOCK."

3.

Pull down cover with the handle (Figure 137) so that

the lock (1) can be locked in the bracket in the ceiling

frame.

1

FG000190

Figure 137

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Operating Controls

2-63

FRONT WINDOWS

WARNING!

When leaving operator's seat, set the safety lever to

"LOCK" position (Figure 138), if not a serious accident

could occur by accidentally moving the work levers.

Front Upper Window

FG000189

The front upper window can be housed in the cabin's

Figure 138

ceiling.

Opening the Window

WARNING!

2

When stowing front window in the cabin roof, make

sure both release levers (1, Figure 139) are latched.

1.

Lower bucket to ground.

1

2.

Set safety lever (Figure 138) on "LOCK."

FG000192

3.

Set engine speed control dial to "LOW IDLE." Allow

Figure 139

engine to idle for three - five minutes.

4.

Shut down engine by turning key to "O" (OFF) position.

5.

Hold the window handles (1, Figure 139), then pull the

lock levers (2) to release the lock. The top of the front

window will come out.

6.

Pull window up, and push it against lock pin at the

rear of the cabin. Make sure that it is securely latched.

7.

Check that lock levers are securely latched in the lock

position.

NOTE:

When the front upper window is open, never

extend your head or body through the window

frame.

NOTE:

If the window happens to fall with a strong

impact against the machine, while some part of

your body is extended out of the cabin, it may

result in bodily injury.

Operating Controls

OP000482

2-64

Closing the Window

WARNING!

Be careful that your hands are not caught in window

frame.

1.

Lower bucket to ground.

1

2

2.

Set safety lever (Figure

138) on "LOCK," and shut

FG000193

down engine.

Figure 140

3.

Holding upper handles (1, Figure 140) of front window

with left and right-hand, pull lock levers (2, Figure 140)

to release the lock.

4.

Push window forward, and lower it slowly.

5.

When the bottom of the window, reaches the top of the

front bottom window, push the front window to engage

the lock (2, Figure 139).

6.

Check that lock levers are securely latched in the lock

position.

Front Bottom Window

1

The front bottom window can be removed and stored in the

rear of the cabin.

1.

After stowing the front upper window in the cabin

ceiling, remove bottom window

(1, Figure

141) from

cabin in direction of the arrow.

FG000194

Figure 141

2.

Set bottom window in rubber holders (2, Figure

142)

behind operator's seat. Secure window with left and

right knobs (3) with push button (4).

3

4

WARNING!

2

Never have wet hands when handling a window.

Never drop window or let it come into contact with

other parts of the machine.

FG001345

Figure 142

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Operating Controls

2-65

DOOR SIDE LATCH

1.

The door side latch (1, Figure 143) is used to secured

the door to the side of the cabin when it is opened.

NOTE:

Keep the door closed and locked when machine

is not in use.

1

FG000196

Figure 143

2.

To release door from side of cabin, push the latch

lever (2, Figure 144) down. The latch lever is to the

left of the operator's seat.

2

FG000673

Figure 144

Operating Controls

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2-66

CABIN STORAGE

2

COMPARTMENTS

There are two storage compartments behind the operator's

seat.

The large compartment

(1, Figure

145) is for storing

nonperishable items.

The covered other one (2, Figure 145) is interconnected with

1

the air conditioner. So, it can be supplied with either warm

FG000209

or cool air when air conditioner is turned "ON."

Figure 145

There is a separate small tray (3, Figure 146) on the right

side of operator's seat.

3

FG000675

Figure 146

ASHTRAY

An ashtray

(1, Figure

147) is to the right side of the

operator's seat on the side of the cabin. Always close

ashtray after putting out a cigarette.

1

FG000200

Figure 147

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Operating Controls

2-67

SUN VISOR

The sun visor can be used to reduce the amount of sunlight

coming through the front window and ceiling.

When wanting to reduce the amount of sunlight coming in

the front window, pull bar (1, Figure 148) down.

2

When not wanting protection, hold the bar with left-hand and

push the release button (2, Figure 148) with right-hand. This

will allow the visor to retract.

1

F

G0

00201

NOTE:

Do not allow the visor to roll back up without holding

Figure 148

it. Not holding it may result in damage to the visor and

retract mechanism.

Ceiling sun visor

(3, Figure

149) slides forward and

backwards.Move it with handle (4) on each side.

4

3

FG000676

Figure 149

When opening the ceiling cover (if equipped), push the sun

visor into its compartment (Figure 150).

FG000204

Figure 150

HANGER

A hanger (1, Figure 151) is located on the upper left side of

the operator's compartment.

WARNING!

1

Do not hang anything that will easily fall down, or will

impair your view out of the cabin.

FG000210

Figure 151

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OP000482

2-68

CUP HOLDER

There is a cup holder on the right side of the compartment

(1, Figure 152). Open the access cover and lower it to a

horizontal position.

1

FG000205

Figure 152

DOOR WINDOW HOLDER

1

When the machine is being operated with the cabin door

window opened, window vibration can be reduced by

tightening knob (1, Figure 153) against the window.

FG000206

Figure 153

EMERGENCY GLASS

BREAKING TOOL

The excavator is equipped with a glass breaking tool. It is to

the upper right corner of the cabin. This tool can be used in

case of an emergency situation which requires the breaking

of glass to exit from the cabin. Grip the handle firmly and

use the sharp point to break the glass.

FG000178

WARNING!

Figure 154

Protect your eyes when breaking the glass.

OP000482

Operating Controls

2-69

MISCELLANEOUS ACCESS

COVERS AND DOORS

Side Door

Open the side access door and slide prop rod (1, Figure

155) in slot (2) until it locks at the end of slot.

1

2

FG000165

Figure 155

Battery Box Door

1

Opening

Open door until locking device (1, Figure 156) latches.

Closing

While holding door, press locking device to release lock and

close door.

FG000166

Figure 156

Engine Cover

2

Open the cover and slide prop rod (1, Figure 157) in the

slot (2) until it locks in notch at the end of slot to support

the cover.

1

To close cover, move end of prop rod out of notch so it can

slide in slot.

FG000167

Figure 157

Operating Controls

OP000482

2-70

Operational Checks Before Starting

Engine

WARNING!

When leaving operator's seat, set the safety lever to

"LOCK" (Figure

1) position, if not a serious accident

could occur by accidentally moving the travel or work

levers.

FG000211

Figure 1

1.

Set safety lever on "LOCK" (Figure 1).

2.

Fasten seat belt. Check for proper operation and condition.

3.

Set all operation levers in "NEUTRAL."

NOTE:

Be careful not to touch any switches when

starting engine.

4.

Rotate the starter switch to the "I" (ON) position

(Figure 2). Check all indicator lights. A warning buzzer

will sound for about two seconds. After two seconds,

O I

all lights except the following will turn "OFF."

•

Charging warning light

•

Engine oil pressure warning light

•

Engine coolant temperature gauge

•

Fuel gauge

•

Hydraulic oil temperature gauge

FG000084

Figure 2

•

Engine rpm (0 rpm) digital readout

NOTE:

If all of the indicator lights do not come "ON"

when the key is first turned, there is a problem.

OP000483

Operation

3-3

Engine Start

WARNING!

Start the engine after sounding horn and making sure that

there are no people or obstacles in the area.

1.

Perform all steps in “Operational Checks Before

Starting Engine” on page 3-3.

2.

Set engine speed control dial slightly above "LOW

IDLE" (Figure 3).

3.

Sound horn.

HAOB34L

Figure 3

4.

Enter password.

NOTE:

If the security system is "LOCKED," a four-digit

02/05 [MO]

11:30

password will be required to start the engine. If the

system is "UNLOCKED," no password will be

ENTER

required and this display screen will not appear.

PASSWORD

C

H

E/G SPEED

0 RPM

FG001445

Figure 4

" "

5.

Turn starter switch to

(START) position (Figure

5). Engine should start in approximately five seconds.

O I

WARNING!

If the engine does not start after approximately fifteen

seconds of cranking, release the starter switch. Wait

about five minutes and repeat above step.

FG000085

6.

After engine has started, release key. Key will return to the

"I" (ON) position (Figure 5).

Figure 5

7.

Follow procedures in “Hydraulic System Warm-up” on

page 3-9.

Operation

OP000483

3-4

8.

After warming unit, check all operating indicators to make

sure that all engine systems (oil pressure, coolant, etc.) are

4

5

6

7

in the normal operating range. If any problems are noticed,

shut down engine. Normal indicators are:

CHECK

02/05 [MO] 11:30

2

1

3

E/G SPEED

1700 RPM

FG000092

Figure 6

INDICATOR

No.

INSTRUMENT PANEL LIGHT OR GAUGE

READING

1

Engine Coolant Temperature Gauge

Blue Range

2

Fuel Gauge

Blue Range

3

Hydraulic Oil Temperature Gauge

Blue Range

4

Charging Warning Light

OFF

5

Engine Oil Pressure Warning Light

OFF

6

Engine Coolant Temperature Warning Light

OFF

7

Engine Check Warning Light

OFF

9.

Check color of exhaust smoke.

•

No color or light blue - Engine is running in good

condition.

•

Black - Incomplete combustion. Check cause.

•

White or dark blue - Engine is burning engine oil.

Check cause.

10.

Check for usual engine vibration and noises. If any are

heard or felt, investigate cause.

NOTE:

If engine coolant temperature gauge pointer

moves into the red zone, the engine coolant

temperature warning light will turn "ON," a

warning buzzer will sound, and the engine

speed will be automatically reduced. Allow the

engine to run at low idle speed until the

temperature gauge registers in the blue zone

again. When the blue zone is reached, allow the

engine to idle for an additional three - five

minutes before shutting down the engine. If not

allowed to idle, heat surge may develop which

will damage the engine. Allowing the engine to

idle will dissipate heat. Check the coolant level,

look for a loose fan belt, inspect for debris

around radiator, and so on.

OP000483

Operation

3-5

Cold Weather Starting

WARNING!

DO NOT USE STARTING FLUIDS. The preheat system could

cause the starting fluid to explode. Starting fluids should

never be used.

1.

Perform all steps in "Operational Checks Before Starting

Engine."

2.

Set engine speed control dial slightly above "LOW

IDLE" (Figure 7).

3.

Sound horn.

HAOB34L

Figure 7

4.

Turn starter switch to the "I" (ON) position (Figure

8).

When preheat cycle is completed, the preheat indicator

light

(1, Figure 9) will turn "OFF."

O I

FG000084

Figure 8

1

CHECK

FG000217

Figure 9

Operation

OP000483

3-6

5.

After the preheat completion, immediately turn starter

" "

switch to

(START) position (Figure 10). Engine

O I

should start in approximately five seconds.

WARNING!

If the engine does not start after approximately fifteen

seconds of cranking, release the starter switch. Wait

FG000085

about five minutes and repeat above step.

Figure 10

6.

After engine has started, release key. Key will return to

the "I" (ON) position (Figure 10).

7.

After the engine starts, check all operating indicators to

make sure that all engine systems (oil pressure,

coolant, etc.) are in the normal operating range. If any

problems are noticed, shut down engine.

8.

Follow "Hydraulic System Warm-up" procedures in this

section. (See page 3-9)

Starting Engine With a Booster Cable

WARNING!

1.

An explosive gas is produced while batteries are in

use or being charged. Keep flames or sparks away

from the battery area.

2.

Charge batteries in a well ventilated area.

HAOA440L

3.

Always wear eye protection when starting a machine

Figure 11

with jumper cables.

4.

Improper jump starting procedures can cause an

explosion resulting in personal injury.

5.

Jump start vehicles on dry ground or concrete. Do not

jump start the machine on a steel floor, because the

floor is always grounded.

6.

When starting from another machine, make sure the

machines do not touch.

7.

Always connect the auxiliary battery positive

(+)

terminal too depleted battery positive (+) terminal first.

Then connect auxiliary battery negative (-) terminal to

the frame of the depleted battery machine second.

8.

Connect positive cable first when installing cables and

disconnect the negative cable first when removing.

OP000483

Operation

3-7

IMPORTANT

The machine has a

24V (-) negative ground electrical

system. Use the same capacity 24V booster batteries when

jump starting engine.

If the batteries are drained during starting procedures, jump

start engine using auxiliary or booster batteries according to

the following procedure;

Connecting the Booster Batteries

1

1.

Shut down engine of the machine on which booster

RED

batteries (3, Figure 12) are mounted.

2.

Connect one end of red cable (1, Figure 12) to the

positive (+) terminal of the machine batteries (4), and

the other end to the positive (+) terminal of the booster

batteries.

3

4

3.

Connect one end of black cable (2, Figure 12) to the

BLACK

negative (-) terminal of the booster batteries (3), and

2

5

then make ground connection to the upper frame (5) of

ARO0440L

the machine to be started with the other end of black

Figure 12

(-) cable

(2, Figure

12). When making the last

connection to upper frame, be sure to connect the

cable end as far away from the machine batteries as

possible. DO NOT CONNECT DIRECTLY TO THE

NEGATIVE BATTERY TERMINAL.

4.

Start the engine.

Disconnecting the Booster Batteries

1.

Disconnect black negative (-) cable (2, Figure 12) from

the machine frame (5) first.

2.

Disconnect the other end of black negative (-) cable (2,

Figure 12) from the booster batteries (3).

3.

Disconnect red positive (+) cable (1, Figure 12) from

the booster batteries (3).

4.

Disconnect red positive (+) cable (1, Figure 12) from

the machine batteries (4).

Operation

OP000483

3-8

Hydraulic System Warm-up

WARNING!

If a problem or abnormal operation occurs, immediately

shut down engine. Allow excavator to reach normal

operating temperature before starting work, especially in

cold weather.

The correct operating temperature of the hydraulic oil is 50°

- 80°C (120° - 175°F). Make sure to follow the procedures

listed here for hydraulic fluid warm-up.

1.

Run engine for approximately five minutes set at the

middle of the speed range, without a load.

HAOB410L

Figure 13

2.

Set safety lever (1, Figure 14) on "UNLOCK" position.

1

FG000093

Figure 14

3.

Slowly cycle boom, arm and bucket cylinders about five

times without a load to circulate the oil through the

system. Do this for five minutes.

4.

Check for clearance and fully raise the front

attachment. Swing clockwise

3 revolutions. Swing

counterclockwise 3 revolutions.

5.

Travel forward and reverse at low speed for two

revolutions of the drive sprocket.

FG000380

Figure 15

OP000483

Operation

3-9

Hydraulic System Warm-up - Cold

Weather

1.

Run engine at "LOW IDLE" (no load) for five minutes

(Figure 16).

HAOB290L

Figure 16

2.

Run engine for approximately five minutes set at the

middle of the speed range, without a load (Figure 17).

HAOB410L

Figure 17

3.

Set safety lever (1, Figure 18) on "UNLOCK" position.

1

FG000093

Figure 18

4.

Slowly cycle boom, arm and bucket cylinders about five

times without a load to circulate the oil through the

system. Do this for five minutes.

FG000380

Figure 19

Operation

OP000483

3-10

5.

Set engine speed control dial to "HIGH IDLE" (Figure

20).

6.

Repeat Step

4 for five minutes. If working speeds

continue to be slow, continue to operate, but use

extreme caution because the machine function may be

erratic.

7.

Check for clearance and fully raise the front

attachment. Slowly swing clockwise

3 revolutions.

Slowly swing counterclockwise 3 revolutions.

8.

Travel forward and reverse at low speed for two

HAOB550L

revolutions of the drive sprocket.

Figure 20

Engine Shut Down

NOTE:

Allow engine to idle for three - five minutes before

shutting down the engine. If not allowed to idle, heat

surge may develop which will damage the engine.

Allowing the engine to idle will dissipate heat.

1.

Park excavator on level and firm ground.

2.

Lower front end attachment to ground and make sure

all operating controls are in "NEUTRAL."

FG006915

Figure 21

3.

Set safety lever on "LOCK" position (Figure 22).

Unlock

lock

FG001091

Figure 22

4.

Set engine speed control dial to "LOW IDLE" (Figure

23). Allow engine to idle for three - five minutes.

HAOB290L

Figure 23

OP000483

Operation

3-11

5.

Shut down engine by turning key to "O" (OFF) position

(Figure 24).

O I

6.

Remove key from starter switch.

Check and Confirmation After Stopping

Engine

1.

Repair excavator, if there are any coolant or oil leaks.

2.

Inspect front attachment and under carriage for

FG000390

abnormal appearances. Correct any problems.

Figure 24

3.

Fill fuel tank.

4.

Get rid of any accumulated flammable materials such

as leaves and paper etc. in engine compartment.

5.

Clean all mud, etc. from undercarriage and tracks.

Make sure that all steps and hand holds are clean,

and that the operator's compartment is clean.

Operation

OP000483

3-12

SAFETY LEVER

WARNING!

When stopping engine or leaving the operator's seat,

"LOCK" the safety lever, otherwise, a serious accident may

occur by accidental movement of travel and work levers.

Whenever leaving the operator's seat, make sure the engine

is shut down and the safety lever is "LOCKED."

Especially, when adjusting the seat, control stands, or

raising the front window, lower window, or ceiling cover,

never forget to lock the safety lever in its "LOCKED"

position.

Be careful not to move the work levers (joysticks) when

moving safety lever.

1.

Push safety lever (Figure 25) down into the "LOCKED"

position. When safety lever is in the "LOCKED"

position, the front attachment, swing and travel

movement will be disabled even though a lever is

Unlock

moved.

NOTE:

Lower bucket (front attachment) to ground.

Place all control levers in "NEUTRAL" and shut

down engine, before using the safety lever.

2.

Set safety lever (Figure

25) on "RELEASE/UNLOCK"

lock

position, by pulling it up before starting work.

FG001091

NOTE:

When the engine is not running, but the safety

Figure 25

lever is "RELEASED" and the starter key is

tuned "ON," moving the work levers (joysticks)

may result in movement. The charged

accumulators in the system will provide pilot

pressure for control valve spool movement.

OP000483

Operation

3-13

TRAVEL

WARNING!

1.

Before operating the travel levers, make sure that

you know in which direction the machine is

pointing. Look at the end of the track assemblies. If

the drive motors are visible while sitting in the

operator's seat, you are looking at the back end of

the track assembly (therefore, you are looking

backwards). In this case, the response of the travel

levers will be the reverse of normal operation.

2.

Before moving, make sure that there are no

personnel in the way or on the machine. Sound the

horn to alert workers that you are about to move

the machine.

3.

Be sure the path is clear during travel.

4.

Use extreme caution when reversing travel. Be sure

there is a clear path behind the machine.

5.

Make sure to operate the travel control levers

smoothly to avoid sudden starts or stops.

6.

Before leaving the operator's seat, make sure to

lock out all control systems and shut down the

engine to avoid accidental activation.

Automatic Travel Speed Control

WARNING!

Do not change the travel mode while traveling. Always use

speed mode "O" when traveling down a slope. It is very

dangerous to change to speed modes indicated "I" or "II"

while going down a slope. Only change travel mode after

coming to a complete stop.

Two travel speed ranges can be selected by using the travel

speed selector switch on the control panel (Figure 26).

O

"O" (LOW) - In this position low travel speed and a higher

I

torque are selected.

II

"I" (HIGH) - In this position high travel speed and a lower

torque are selected.

"II" (AUTOMATIC) - Setting the control at the "II" position

enables the machine to change to a different speed range

automatically. This change happens automatically depending

on the hydraulic oil pressure in the travel circuit. When

FG000023

hydraulic oil pressure rises, the travel speed is automatically

Figure 26

set to low. An example is if the machine is traveling on a

Operation

OP000483

3-14

Travel Control Lever Operation

1.

To travel straight (Figure 27), push both travel control

levers/pedals fully forward or backwards. The farther

the levers/pedals are pressed, the faster the travel

speed.

NOTE:

"X" is the sprocket end of the track.

"X"

FG000303

Figure 27

2.

Pivot turns (Figure 28) are made by rotating only one

track forward or backward. The machine will pivot on

the nonmoving track.

NOTE:

"X" is the sprocket end of the track.

"X"

FG000304

Figure 28

3.

Spin turns (Figure 29) are made by rotating one track

forward and one track backward. The machine will spin

around its center point, thus counterrotating.

NOTE:

"X" is the sprocket end of the track.

"X"

FG000305

Figure 29

4.

Stopping travel (Figure 30) - Returning travel levers to

"NEUTRAL" position will automatically apply brakes and

stop excavator.

NOTE:

"X" is the sprocket end of the track.

"X"

FG000306

Figure 30

Operation

OP000483

3-16

General Travel Instructions

1.

Set engine speed control dial (Figure 31) on desired

speed.

HAOB550L

Figure 31

2.

Set safety lever on "UNLOCK" position, and folding the

front, raise it 40 - 50 cm (16 - 20 in) above ground.

See Figure 32.

40 ~ 50 cm

FG000123

Figure 32

3.

When possible, travel on firm, level ground. Avoid

sudden movements and sharp turns.

4.

When traveling on rough ground, travel at a slow

speed [1.0 - 1.5 km/h

(0.62

- 0.93 MPH)]. Reduced

engine speed, to avoid shock loading the equipment.

Be careful that an excessive force is not added to

equipment by touching or climbing on rocks.

FG000423

Figure 33

OP000483

Operation

3-17

5.

On rough, frozen or uneven terrain, travel slowly.

WARNING!

When traveling, keep bucket from 20 - 30 cm (8 - 12 in)

above ground.

Do not travel backward on a slope.

Never turn or travel crosswise on a slope.

Choose a safe alternate route before climbing a slope.

FG006916

If excavator starts to slip or becomes unstable, lower

Figure 34

the bucket immediately into the ground, using it as a

brake.

Avoid working on slopes, because there is a danger of

overturning by becoming unbalance while swinging

and performing front attachment operations.

It is very dangerous to swing towards bottom of slope

with a loaded bucket.

In unavoidable cases level the slope with fill soil,

to make the vehicle as horizontal as possible. See

Figure 34.

FG006917

Do not travel on slopes more than 30° due to turnover

danger.

Figure 35

6.

Travel straight up or down slopes, never diagonally

across the slope. See Figure 35 and Figure 36. Extend

the arm and lower the boom to keep the bucket about

20 - 30 cm (8 - 12 in) off the ground. If the machine

starts to slide or becomes unstable, lower the bucket to

regain control. If the engine stalls, lower the bucket,

make sure that all controls are in the neutral position

and restart the engine.

NOTE:

Even though engine stops on a slope, do not

operate swing control. The hydraulic

accumulators may cause the unit to swing.

FG006918

Figure 36

NOTE:

Do not open or close operator's door on a slope.

Make sure door is latched.

7.

If dirt or mud builds up in the track frame, raise each

track and rotate and clean that track.

CAUTION!

When using the boom and arm to lift any portion of the

machine, roll the bucket until the round base is against

the ground. The angle of the arm to the boom should

be at 90°.

FG000376

Figure 37

Operation

OP000483

3-18

Make sure that the material buildup has been cleared.

See Figure 37 and Figure 38.

8.

The excavator can travel in water that comes up to

center of upper carriage rollers. Make sure that footing

is solid so that the machine will not sink. See “Working

90 ~ 110

in Water” on page 3-30.

NOTE:

If the machine is submerged to the point that

water or mud gets into the swing bearing or

center joint, stop machine operation. Remove

the machine from the submerged location to

FG006919

firm, dry ground. Do not operate until proper

Figure 38

inspection and maintenance have been

completed. Refer to the Shop Manual or contact

your distributor.

OP000483

Operation

3-19

OPERATING INSTRUCTIONS

Engine Speed Control

Engine speed can be manually adjusted using the engine

speed control dial, Increase engine speed by rotating the

control knob clockwise. Decrease engine speed by rotating

the control knob counterclockwise.

IMPORTANT

The engine speed control system has been set at the

HAOA690L

factory and should not require adjustment as part of routine

Figure 39

maintenance.

Mode Selection

More efficient work can be done by choosing a proper

power and work mode combination, suitable to type of work

and conditions. Use the mode selection according to

following guide.

Power Mode

2

1.

When the starter switch is turned "ON" the power

mode is automatically defaulted to the standard setting.

2.

Select a proper power mode using button (1, Figure

1

40) before starting work.

1

2

3.

When the power mode button

(1, Figure

40) is

pressed, a signal sounds, changing the power mode to

either "ON" or "OFF." When the power mode is turned

"ON," the LED indicator (2, Figure 40) turns "ON."

5

6

FG000114

Deactivate the power mode by pressing it a second

Figure 40

time. When the power mode is turned "OFF," the LED

indicator

(2, Figure

40) turns "OFF" and the power

mode returns to the standard mode.

Mode

Selection Point

• General work.

STANDARD MODE

• Minimize fuel consumption.

• Required to perform heavy work in a short period of time.

POWER MODE

• Fast speed loading.

• Fast speed travel.

Operation

OP000483

3-20

Work Mode

1.

When the starter switch is turned "ON" the work mode

is automatically defaulted to the digging mode.

2.

Select the work mode using button

(3, Figure

41)

before starting work.

1

2

4

3.

When the work mode button (3, Figure 41) is pressed,

a signal sounds, changing the work mode to either

"Digging Mode" or "Trenching Mode." When the

3

trenching mode is selected, the LED indicator

(4,

5

6

Figure

41) turns "ON." When the digging mode is

FG000115

selected, the LED indicator (4, Figure 41) turns "OFF."

Figure 41

4.

When the trenching mode is selected, the control valve

is set to optimum condition for trenching work.

Mode

Selection Point

Feature of Control

• General excavation.

General standard.

• Loading dump trucks.

DIGGING MODE

• Lifting and transport of heavy objects.

• Breaker.

• Trenching.

TRENCHING

The swing is faster and stronger

• Excavating of side wall.

MODE

than boom or arm.

• Required to constant swinging.

Auto Idle Mode

6

1.

The system will automatically reduce engine speed to

idle speed approximately four seconds after all of the

control levers are in the neutral position. When a pilot

function is activated, engine speed is automatically

5

1

2

returned to the preselected range.

2.

When the starter switch is turned "ON," the work mode

is automatically defaulted to "AUTO IDLE."

3.

When the LED indicator (6, Figure 42) is turned "ON,"

5

6

the auto idle function is activated. Deactivate the auto

FG000116

idle function by again pressing the auto idle selector

Figure 42

button (5, Figure 42). At this time the LED indicator will

be turned "OFF."

WARNING!

Turn "OFF' auto idle function when performing work in

close operating area, i.e., work in a narrow area and

loading / unloading on or off a trailer.

OP000483

Operation

3-21

Boost Mode

I

1.

Power boost switch is used to gain maximum digging

O

force.

I

2.

The power boost is activated while the lower button is

being pressed on top of the right-hand work lever

(joystick). The breaker / boost / shear selector switch

must be in the "O" (BOOST) position.

NOTE:

The power boost mode does not affect forward

and reverse travel.

Do not use this switch for more than ten

seconds.

FG000117

Figure 43 RIGHT-HAND WORK LEVER

(JOYSTICK)

Operation

OP000483

3-22

Work Levers (Joysticks) (ISO Style)

1

5

WARNING!

3

4

7

8

Check surrounding area before swinging. When operating a

lever while in auto idle, do it carefully, because the engine

2

6

speed will increase rapidly.

NOTE:

When starting work, move work levers (joysticks)

FG000381

slowly and check movement of swing and front

Figure 44

attachment.

This equipment is manufactured using the lever configuration

described in ISO standards. Do not change valving, hoses,

etc., that would change this standard. The boom, arm and

bucket movements and swing direction of work levers

(joysticks) are as follows:

Left-hand Work Lever (Joystick) (Figure 44 and Figure

45)

4

1.

Arm dump

1

3

2.

Arm crowd

2

3.

Left swing

4.

Right swing

NOTE:

The swing brake is spring applied and

hydraulically released. It is always engaged

when the work lever (joystick) is in "NEUTRAL"

FG006920

or the engine is shut down.

Figure 45

NOTE:

The following is not a mechanical malfunction

but a proper phenomenon of the excavator.

When operating the arm, it may stop

momentarily. When the arm is operated, the

weight of the arm may cause it to move faster

than the amount of oil being supplied.

FG000120

Figure 46

OP000483

Operation

3-23

Right-hand Work Lever (Joystick) (Figure 44 and Figure

47)

6

5.

Boom down

6.

Boom up

7.

Bucket crowd

5

7

8.

Bucket dump

8

NOTE:

Even after stopping the engine, the front can be

lowered to the ground by operating work lever

(joystick), by setting safety lever on "UNLOCK"

FG006921

position and turning starter switch "ON."

Figure 47

Change Machine Control Pattern by

Select Valve (If Equipped)

1

5

WARNING!

3

4

7

8

Check surrounding area before swinging. When operating a

2

6

lever while in auto idle, do it carefully, because the engine

speed will increase rapidly.

FG000381

Figure 48

NOTE:

When starting work, move work levers (joysticks)

slowly and check movement of swing and front

<ISO PATTERN>

attachment.

The machine control pattern can easily be changed to the

ISO standard or to the standard backhoe loader hydraulic

system (BHL) by changing the position of the select valve (if

equipped). Use the following procedure to change the

position of the select valve.

The select valve is located in the rear of the cabin.

1.

Rotating spool to the ISO position or to the BHL

<BHL PATTERN>

position. (Figure 49)

FG004954

Figure 49

Operation

OP000483

3-24

Work Levers (Joysticks) (BHL Style)

Left-hand Work Lever (Joystick) (Figure 48 and Figure

2

50)

4

1.

Boom down

2.

Boom up

3

3.

Left swing

1

4.

Right swing

NOTE:

The swing brake is spring applied and

hydraulically released. It is always engaged

when the work lever (joystick) is in "NEUTRAL"

FG006938

or the engine is shut down.

Figure 50

Right-hand Work Lever (Joystick) (Figure 48 and Figure

51)

5.

Arm dump

5

6.

Arm crowd

6

7.

Bucket crowd

7

8.

Bucket dump

8

NOTE:

The following is not a mechanical malfunction

but a proper phenomenon of the excavator.

FG006939

When operating the arm, it may stop

momentarily. When the arm is operated, the

Figure 51

weight of the arm may cause it to move faster

than the amount of oil being supplied.

NOTE:

Even after stopping the engine, the front can be

lowered to the ground by operating work lever

(joystick), by setting safety lever on "UNLOCK"

position and turning starter switch "ON."

FG000120

Figure 52

OP000483

Operation

3-25

OPERATING PRECAUTIONS

WARNING!

Do not rest your feet on the travel pedals during normal

machine operation. Unexpected machine travel may occur

in this situation.

1.

Before starting work, investigate terrain and soil

condition. Level ground and drain area if necessary.

2.

Install window guards when working where there is a

possibility of falling rocks or other objects.

FG000374

Figure 53

3.

Check strength of supported structures in advance

before working on them. If insufficient, reinforce it. If

any doubt exists about structural strength, refuse to

operate unit.

4.

It is possible that the boom, arm or bucket may come

into contact with the upper or lower structure of the

machine. There are digging conditions which could

allow this to happen.

FG000375

Figure 54

5.

Do not continually "bottom out" the hydraulic cylinders.

Machine damage may occur if the cylinders are fully

extended or retracted, example: arm cylinder fully

retracted and the bucket cylinder is extended to rotate

the bucket into the ground.

FG006922

Figure 55

Operation

OP000483

3-26

6.

Do not use machine travel or swing when the bucket is

in the ground to provide additional breakout force. See

Figure 56.

FG006923

Figure 56

7.

Do not use machine weight to provide additional

breakout force. See Figure 57.

8.

When working on soft or muddy ground, make sure

that the machine is not sinking.

FG006924

Figure 57

9.

When working close to the excavated edge, make sure

that the ground the machine is sitting on is solid. Keep

the travel motors (1, Figure 58) to the rear. See Figure

58.

1

FG006925

Figure 58

10. Do not excavate underneath the machine. See Figure

59.

FG006905

Figure 59

OP000483

Operation

3-27

11. Make sure that there is adequate clearance from

overhead electrical supply lines. See Figure 60.

FG006907

Figure 60

12. If the excavation is in an underground location or in a

building, make sure that there is adequate overhead

clearance and that there is adequate ventilation. See

Figure 61.

FG006926

Figure 61

13. Do not use the bucket as a hammer or ramming

device. This is dangerous and causes damage to the

front attachment. See Figure 62.

FG006927

Figure 62

14. Do not dig with the excavator tracks raised. This can

result in structural and mechanical failures.

FG006928

Figure 63

Operation

OP000483

3-28

15. Do not operate travel lever quickly when traveling in

high range.

•

Avoid sudden starts.

•

When traveling in one direction come to a

complete stop before reversing directions. Do not

rock excavator back and forth with levers.

•

Avoid sudden stops. Return levers to neutral by

hand. Do not let them snap back to neutral on

their own.

FG000213

16. If the optional long fronts or attachments or heavy duty

Figure 64

front end attachments are used, the machine balance

will be altered. Follow these additional operating

precautions.

WARNING!

Do not travel downhill with the front end attachments

raised.

Do not travel across slopes; travel straight up or down

slope.

Use extreme caution when swinging the upper frame

when positioned on a slope.

Allow extra swing stopping room. The additional

momentum generated by the longer or heavier front

end equipment will increase the amount of time

needed to stop the swing motion.

Make sure that all optional equipment has been

authorized and installed properly.

17. Do not move dirt or objects by swinging the excavator

into them. This can result in structural and mechanical

failures.

OP000483

Operation

3-29

Working in Water

IMPORTANT

When working in water, do not exceed a slope of more than

15°. If the slope is over 15°, the rear part of the upper

structure will be immersed in water, resulting in radiator fan

and engine ECU damage.

FG006929

Figure 65

When working in water, do not operate in water over center

of upper roller (1, Figure 66).

If swing bearing gets wet, immediately grease it until all old

grease is purged from bearing.

If

water gets into swing gear housing, drain water

immediately by removing lower inspection cover. Apply new

grease.

After working in water, purge old grease on bucket pins.

1

FG006930

Figure 66

Operation

OP000483

3-30

PARKING EXCAVATOR

WARNING!

120

Park excavator on firm, level ground. Avoid parking on

slopes. If excavator must be parked on a slope, block tracks

and place bucket teeth in ground. See Figure 67.

FG006931

Figure 67

1.

Park excavator on firm, level ground. Lower bucket to

ground as shown in Figure 68.

FG006932

Figure 68

2.

Set engine speed control dial on "LOW IDLE."

HAOB290L

Figure 69

3.

If you touch the operation lever unintentionally, it may

create a serious accident. Before leaving operator's

seat, set safety lever on "LOCK" position.

Unlock

lock

FG001091

Figure 70

OP000483

Operation

3-31

TOWING PROCEDURE

Cloth

WARNING!

Never use a damaged wire rope or chain. They could brake

and cause a serious accident.

Towing Wire

Always wear gloves when handling a chain or wire rope.

When towing excavator use a wire rope or chain capable of

handling the load.

Attach chain or wire rope to track frame as shown in

Figure 71

Insert protective material such as thick cloths between

Shackle

track frame and wire rope to prevent the wire rope from

being damage.

Towing Wire_FG000669

Figure 71

IMPORTANT

Use shackle hook on track frame to only haul objects that

weigh less than 5 metric tons (5.51 U.S. Tons). Never use it

to haul objects over 5 metric tons (5.51 U.S. Tons).

Operation

OP000483

3-32

3.

Do not use the breaker as a hammer. See Figure 72.

Do not drop breaker from extreme heights.

The breaker is relatively heavy and drops fast. Do not

drop breaker from extreme heights or damage to upper

structure may result.

FG006933

Figure 72

4.

Do not operate the breaker with the boom or arm

cylinders fully extended (bottomed out). See Figure 73.

Leave over 100 mm (4 in) of clearance between rod

end of cylinder and cylinder head. This will help

prevent damage to cylinders during breaker operation.

FG006934

Figure 73

5.

Do not use the breaker if the hydraulic hoses vibrate

excessively. See Figure

74. Check the breaker's

1

hydraulic accumulator

(1) for damage and repair as

required. If excavator is operated under this condition,

structural and hydraulic components can be damaged.

FG006935

Figure 74

6.

Do not allow the breaker body to go into water if not

equipped for underwater operation. The breaker seal

can be damaged and allow rust, foreign material or

water to enter the hydraulic system and cause damage.

Only insert the breaker tool into water. See Figure 75.

HAOB970L

Figure 75

Operation

OP000483

3-34

7.

Do not any lifting or towing with a breaker. See Figure

76.

FG006936

Figure 76

8.

Operate the breaker only to the front and rear of the

excavator. Do not use the breaker to either side of the

excavator. Do not swing the breaker from side to side

when operating it. See Figure 77.

WARNING!

Operating a breaker with the upper body turned 90° to

the tracks can result in tipping over the machine or

reduction in service life.

HAOB990L

Figure 77

9.

Do not curl the breaker tool tip into the arm or boom

when traveling or parking the excavator. See Figure 78.

FG006940

Figure 78

OP000483

Operation

3-35

To activate breaker

I

1.

Set breaker selector switch to "II" (BREAKER) position.

O

2.

Press lower button on top of right-hand work lever

I

(joystick) to activate hydraulic breaker.

3.

Release lower button on top of right-hand work lever

(joystick) to deactivate hydraulic breaker.

FG000117

Figure 79 RIGHT-HAND WORK LEVER

(JOYSTICK)

Relief Valve Adjustment

1.

Cap pipe on arm end, using a cap capable of handling

350.0 kg/cm²

(5,000 psi) under the condition of

disconnecting hose to hydraulic breaker.

2.

Adjust pump pressure using activating the breaker, and

watching the pressure displayed on the instrument

panel. Press the display selector button to show digital

pressure reading. (A separate pressure gauge is not

required.)

3.

Adjust the relief valve pressure by turning the

adjustment screw of breaker relief valve. The relief

valve is installed on the left side of the upper structure

behind the boom. (Do not use the overload relief valve

FG006937

on the lower part of control valve for the breaker relief

Figure 80

valve.)

WARNING!

If the relief valve pressure is adjusted while the

hydraulic breaker is connected, there is possibility

that a high-pressure spike or setting could break a

hose or pipe. Personal injury or death could result

from a hydraulic hose or pipe failure.

Operation

OP000483

3-36

Hydraulic Oil and Filter Service Intervals

When using a hydraulic breaker, the viscosity breakdown

and contamination of hydraulic oil is faster because the work

condition is more severe than during normal digging work.

To prevent the hydraulic components (especially pump) from

having a shortened life cycle, replace the hydraulic oil and

main hydraulic oil return filter using the following schedule.

Attachment

Operation Rate

Hydraulic Oil

Filter

250 Hours (First Replacement)

Bucket Work

100%

2,000 Hours

1,000 Hours (After First Replacement)

Hydraulic Breaker

100%

500 Hours

100 Hours

Work

*

These service intervals only apply, when a genuine DOOSAN oil and filter are used. If any other

brands are used, the guaranteed changed interval should be reduced in half.

100

105

116

551

106

14

4

614

80

FILT

ER

692

112

171

(Firs

t Replacement)

119

214

782

60

128

275

893

HYDRAU

LIC OIL

137

335

1028

40

FILTER

15

6

412

(A

fter F

irst Replacement)

1196

175

500

1400

20

206

63

5

1658

0

500

1000

1500

2000

MACHINE OPERATING HOURS

FG000767

Figure 81

NOTE:

The replacement intervals of hydraulic oil and filter

depend upon the amount of time the hydraulic

breaker is being used. These intervals should be

followed as opposed to regularly scheduled

maintenance.

OP000483

Operation

3-37

ADJUSTING THE PUMP FLOW

NOTE:

For further information, see “Flow Control” on

page 2-46.

1.

On the instrument panel, press the flow control button

, the flow control screen (Figure

82) will be

displayed.

2.

Use "UP" (

) or "DOWN" (

) buttons to adjust flow

rate.

3.

Press "SELECT"

(

) button, to return to normal

display screen and save the flow rate setting.

02/05 [MO] 11:30

FLOW CONTROL

E

F

C

H

C

H

: APPLY

ESC: CANCEL

E/G SPEED 1700 RPM

<Normal Display>

<Flow Control Display>

FG001090

Figure 82

Setting

Flow Rate (l/min)

0

48

1

53

2

71

3

89

4

109

5

128

6

148

7

167

8

187

9

207

10

219

Operation

OP000483

3-38

Shear Pedal Valve (Optional)

Activating Shear with Pedal Valve

1.

Select shear with the selector switch of the right panel.

1

2.

Two-way operation is possible by rocking the pedal

back and forth between positions (1 and 2, Figure 83).

When the pedal is in its center (at rest) position the

valve is in "NEUTRAL" and hydraulic oil flow is

stopped.

2

3.

Before operating the attachment, be sure to check the

function controlled by the direction of the pedal

movement.

FG000402

Figure 83

Activating Breaker with Pedal Valve

1.

Select breaker with the selector switch of the right

panel.

5

2.

Rotate knob (3, Figure 84) 120° for stopper (4, Figure

84) be fastened to (5, Figure 84).

3.

In the condition that (2, Figure 84) is fastened, activate

the breaker to the direction (1, Figure 84).

3

4

FG000403

Figure 84

Adjusting the Stopper

1.

Rotate knob

(3, Figure

84) in the direction of the

arrow. then the pedal is activated according to the

display caused by (3, Figure 84) knob rotation.

CAUTION!

Breaker

When operating breaker or shear when using button

on a joystick, and it is not to be controlled by the

Lock

pedal, be sure to keep the stopper in the "LOCK"

position in order for the pedal not to be activated.

Shear

FG000434

Figure 85

OP000483

Operation

3-39

Rotating Pedal Valve (Optional)

1

Attachment Rotating by Using the Pedal Valve

1.

Pressing end (1, Figure 86) is used to turn clockwise.

2.

Pressing end

(2, Figure

86) is used to turn

counterclockwise.

2

NOTE:

Before activating the pedal, be sure to check

the function of the attachment.

FG000405

Figure 86

Locking the Pedal

When rotating is not needed, the pedal can be locked by

using the prop rod (3) locking device.

Locking is completed when the top end of the prop (3) is

3

positioned into pedal hole.

FG000406

Figure 87

A.

Location for "UNLOCKING."

B,

Location for "LOCKING."

A

B

FG000407

Figure 88

Attachment Rotation Using the Left-hand Work Lever

(Joystick)

For a machine equipped with an attachment that rotates,

rotation is activated while one of the control buttons is being

pressed on top of the left-hand work lever (joystick).

There are three buttons on top of the left-hand work lever.

The left and right ones are for controlling rotation.

NOTE:The middle button is for the horn.

Left button is for counterclockwise rotation, and the right one

FG000035

is for clockwise rotation.

Figure 89 LEFT-HAND WORK LEVER

(JOYSTICK)

Operation

OP000483

3-40

OPERATING TECHNIQUES

Lifting

IMPORTANT

There may be local or government regulations, about the

use of excavators for the lifting of heavy loads. Always

contact your local and government agencies in regards to

these regulations.

To prevent injury, do not exceed the rated load capacity of

the machine. If the machine is not on level ground, load

capacities will vary.

Short slings will prevent excessive load swing.

Use the lifting eye on the bucket that is provided to lift

objects.

Always try to maintain the lifting eye (Figure

90) straight

below the center line of the arm and bucket pin. In this

manner the weight of the load is being primarily held only

by the pin, and not by the bucket cylinder, link, and link

pins.

When a lifting eye is used, the sling/lifting device must be

fastened to the eye in a manner that will not allow it to

come loose.

The most stable position is over the corner of the machine.

For best stability, carry a load as close to the ground and

HAAD3830

machine as possible.

Figure 90

Lift capacity decreases as the distance from the machine

swing center line is increased.

OP000483

Operation

3-41

Lifting Unknown Weight

When loads are not accurately known are to be lifted, the

person responsible for the job shall ascertain that the weight

FRON

T LIFT

of the load does not exceed the machine LOAD RATING

ZO

N

E

CHART at the radius at which it is to be lifted.

It is recommended that you feel your way into any lift as a

precaution against tip-over. One method is to position the

boom at 90° over the side of the machine. Slowly lift the

SIDE LIFT

SIDE LIFT

ZONE

ZONE

load until it clears the ground. A lift over the side is the

most unstable, and as the load is swung into the front zone

of the excavator it will become more stable. DO NOT

INCREASE SWING RADIUS AFTER THE LOAD IS LIFTED.

REAR LIFT

ZONE

DANGER!

HAAD3842

Figure 91

If a load is picked up from the front zone and swung into the

side zone, a tip-over could result causing a deadly or fatal

injury.

Lifting Known Weight

The load chart is the governing factor when lifting known

weights. It is recommended that you feel your way into any

lift as a precaution against tip-over. Whenever possible, lift

and swing payloads between the front idler area.

Pick and Carry

The machine has the ability to pick and carry payloads

without added labor. We recommend when traveling with a

suspended payload, you evaluate the prevailing conditions

and determine the safety precautions required in each case.

The following factors must be considered before attempting

to pick and carry a load.

Align the boom with the forward direction of machine travel.

Maintain this boom position when turning the machine. Turn

only when necessary, at the slowest speed, and at a wide

turning radius.

1.

Use the shortest lifting radius distance possible.

2.

Keep the load as close to the ground as conditions will

permit.

3.

Provide tag lines to prevent load from pendulating.

Pendulating can cause a change in radius. A change in

radius could exceed the load chart rating or cause a

tip-over condition.

4.

Govern travel speed to suit conditions.

5.

Avoid sudden starts and stops.

Operation

OP000483

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