Takeuchi Gear Box 357A10. Service Manual (1998)

TROUBLESHOOTINTG

SLEWING

RIGHT OR LEFT SLEWING CANNOT BE DONE.

Faulty

Repair or replace the pilot

Inspect the pilot valve.

valve.

Normal

Faulty

Inspect the operation of

Repair or replace the housing

the spool.

block.

Normal

Faulty

Inspect the slew relief

Repair or replace the slew re-

valve.

lief valve.

Normal

Faulty

Inspect the check valve

Repair or replace the slew

of the slew brake valve.

brake valve.

Normal

Repair or replace the slew

The slew motor is faulty.

motor.

1. Inspect the pilot valve.

It could be that the spool for only the side of the

pilot valve for which slewing is impossible will

not operate.

“V-10”

2. Inspect the operation of the spool.

It could be that the spool will not move only in the

direction in which slewing is impossible.

“V-10”

TB175W

V-12

SLEWING

TROUBLESHOOTINTG

3. Inspect the slew relief valve.

Try switching the left and right slew relief valves.

If slewing becomes possible, the relief valve is

faulty.

4. Inspect the check valve of the slew brake

valve.

If foreign matter is caught in one end of the check

valve (1), or if the valve is sticking, right or left

slewing will be impossible.

• If foreign matter is caught in one of the check

valves, the hydraulic oil returns to the tank

from the check valve.

5. The slew motor is faulty.

“IV. Hydraulic Units, Slew Motor”

V-13

TB175W

TROUBLESHOOTINTG

SLEWING

SLEWING SPEED IS LOW, OR THERE IS NO POWER.

Is the time needed for

Within the standard.

slewing within the stan-

Normal

dard?

Not within the standard

Faulty

Repair or replace the pilot

Inspect the pilot valve.

valve.

Normal

Inspect the operation of

Faulty

Repair or replace the housing

the spool.

block.

Normal

Inspect the slew hydrau-

Pressure is low.

Adjust the pressure of

Adjust the set pressure.

lic pressure.

the slew relief valve.

Normal

Pressure does not rise.

Repair or replace the slew re-

lief valve.

Inspect the check valve

Faulty

Repair or replace the slew

of the slew brake valve.

brake valve.

Normal

Faulty

Repair or replace the slew

Inspect the slew motor.

motor.

Normal

The slew bearing is faulty.

Replace.

TB175W

V-14

TROUBLESHOOTINTG

SLEWING

THE MACHINE SLEWS, BUT OVERRUN WHEN SLEWING STOPS IS GREAT, OR IT CANNOT BE STOPPED.

Is the amount of overrun

Within the standard.

when slewing stops

Normal.

within the standard?

Not within the standard.

Faulty

Repair or replace the pilot

Inspect the pilot valve.

valve.

Normal

Inspect the operation of

Faulty

Repair or replace the housing

the spool.

block.

Normal

Inspect the slew hydrau-

Pressure is low.

Adjust the pressure of

Adjust the set pressure.

lic pressure.

the slew relief valve.

Normal

Pressure doesn’t rise Repair or replace the slew re-

lief valve.

Inspect the slew brake

Repair replace the slew brake

valve.

1. Is the amount of overrun when slewing stops

within the standard?

“II. Specifications, Standards for Judging

Performance”

2. Inspect the pilot valve.

Inspect if the spool of the pilot valve returns to the

neutral position when the operation lever (slew)

is released after operation. Disconnect the hose

between the pilot valve and the control valve

(slew section) on the control valve side, then set

a pressure gauge in the disconnected hose.

• Read the pressure gauge after operating the

lever (slew), then releasing it.

• If the pressure is zero, the pilot valve is normal.

TB175W

V-16

SLEWING

TROUBLESHOOTINTG

3. Inspect the operation of the spool.

Inspect if the spool of the control valve (slew

section) returns to the neutral position when the

operation lever (slew) is released after operation.

Disconnect the line from the slew section of the

control valve, then set a pressure gauge in its

supply port.

• Read the pressure gauge after operating the

lever (slew), then releasing it.

• If the pressure is zero, the pilot valve is normal.

4. Inspect the slew hydraulic pressure.

“V-10”

5. Inspect the slew brake valve.

“IV. Hydraulic Units, Slew Motor”

V-17

TB175W

TROUBLESHOOTINTG

SLEWING

SLEWING IN SLOW GEAR IS NOT POSSIBLE.

Inspect the hydraulic

Faulty

Repair or replace the hydrau-

pump P5.

lic pump P5.

Normal

Faulty

Inspect the pilot relief

Adjust, repair or replace the

valve.

pilot relief valve.

Normal

Inspect the slow slew

Faulty

Replace the slow slew switch.

switch

Normal

Inspect the slow slew

Faulty

Repair or replace the slow slew

solenoid valve.

Normal

Inspect the slew flow

Faulty

Repair or replace the slew flow

control valve.

1. Inspect the hydraulic pump P5.

Inspect the hydraulic pump P5 which is the source

of the hydraulic pressure for switching to slow

gear.

“V-4”

Since clogging of the line filter can also be con-

sidered, inspect and clean the filter.

2. Inspect the pilot relief valve.

Measure the relief pressure of the pilot relief

valve.

• If the pressure is the standard value, the valve

is normal.

“II. Specifications Standards for Judging

Performance”

3. Inspect the slow slew switch.

Press the switch to obtain “ON” condition. The

switch is normal when the lamp lights in this

condition.

TB175W

V-18

SLEWING

TROUBLESHOOTINTG

4. Inspect the slow slew solenoid valve.

a. Turn the start switch “ON”.

b. Press the protruding portion of the solenoid

valve lightly.

c. Turn the slow slew switch “ON”.

d. If the spool moves and vibration can be felt

with the fingertip when the circuit changes,

then it is normal.

5. Inspect the slew flow control valve.

Inspect if the spool of the slew flow control valve

moves smoothly.

• Remove the spool cover at the FC port and try

pushing the spool with a finger. It is normal if

it moves smoothly about 9 mm.

V-19

TB175W

TROUBLESHOOTINTG

BOOM

THE BOOM CYLINDER DOESN’T MOVE.

Inspect the operation of

actuators other than the

boom cylinder.

Normal

Faulty

Repair or replace the pilot

Inspect the pilot valve.

valve.

Normal

Inspect the operation of

Faulty

Repair or replace the housing

the spool.

block.

Normal

Operation

Perform a port relief

became normal.

The port relief valve is

Repair or replace the port re-

valve switching test.

faulty.

lief valve.

Does not change.

Inspect the boom cylin-

Faulty

Repair or replace the boom

der.

cylinder.

1. Inspect the operation of actuators other than

the boom cylinder.

Inspect if the operation of the boom cylinder only

Lever Operated

Places inspected

is faulty by the table at right. If its operation is

Bucket

Relief Valve R1

Pump P1

faulty, inspect the main relief valve and the hy-

draulic pump.

“V-6”

TB175W

V-20

BOOM

TROUBLESHOOTINTG

2. Inspect the pilot valve.

Disconnect the hose between the pilot valve and

control valve (boom section) on the control valve

side, then set a pressure gauge in the disconnected

hose.

• Operate the (boom) lever and measure the

pressure.

• Depending the operation angle, if the pressure

is normal, it will range between 0~3.4 MPa.

W2E004

3. Inspect the operation of the spool.

Disconnect the hose between the control valve

(boom section) and the cylinder on the cylinder

side, then set a pressure gauge in the disconnected

hose.

• Operate the (boom) lever and measure the

pressure.

• A pressure of 27.5 MPa is normal.

W2E005

4. Perform a port relief valve switching test.

Switch the port relief valve for the port relief

valve of the normal arm. If the boom cylinder

operates, the boom side port relief valve is faulty.

W2E006

5. Inspect the boom cylinder.

a. Disconnect the hose between the control valve

and the boom cylinder on the control valve

side.

b. Connect the disconnected hose to the arm

section or the bucket section.

c. Try operating the boom cylinder. If the cylin-

der doesn’t operate, the cylinder is faulty.

When performing the operation in “a~c”

above, the bucket cylinder should be fully

W1-E004

extended, the arm cylinder should be fully

retracted and the bucket should be lowered

to the ground.

V-21

TB175W

TROUBLESHOOTINTG

BOOM

BOOM CYLINDER OPERATION IS SLOW, OR THERE IS NO POWER.

Is the boom cylinder’s

Within the standard.

speed within the stan-

Normal

dard?

Not within the standard.

Faulty

Repair or replace the pilot

Inspect the pilot valve.

valve.

Normal

Inspect the operation of

Faulty

Repair or replace the housing

the spool.

block.

Normal

Operation

Perform a port relief

became normal.

The port relief valve is

Repair or replace the port re-

valve switching test.

faulty.

lief valve.

Does not change

Inspect the boom cylin-

Faulty

Repair or replace the boom

der.

cylinder.

1. Is the boom cylinder’s speed within the stan-

dard?

“II. Specifications, Standards for Judging

Performance”

2. Inspect the pilot valve.

“V-21”

3. Inspect the operation of the spool.

Stroke the spools of the boom [1] and boom [2]

sections and inspect whether they move smoothly,

or remove the spools and check whether there is

any foreign matter engaged in them.

4. Perform a port relief valve switching test.

“V-21”

TB175W

V-22

BOOM

TROUBLESHOOTINTG

5. Inspect the boom cylinder.

Boom Cylinder internal Leakage Inspect (1)

a. With the bucket cylinder fully retracted and

with the rod of the arm cylinder a little ex-

tended from the fully retracted position, lower

the bucket front end to the ground.

W1-E005

b. Disconnect the rod side hose (A) only and let

the oil in the piping run out.

Insert a plug (1) in the disconnected hose.

• Test the left and right cylinders one at a

time. Remove both hoses from the cylinder

that is not being inspected at this time and

plug the disconnected hoses.

c. Retract the arm cylinder and lift the bucket so

it is floating above the ground.

At this time, if there is oil leaking from the

piping of the cylinder where the hose was

disconnected, and if the boom cylinder’s rod is

retracted, the cylinder is leaking internally.

Also, if there is no leakage of oil from the

cylinder’s piping, if the boom cylinder’s rod is

retracted, the control valve is leaking inter-

nally.

W1-E006

Boom Cylinder Internal Leakage Inspect (2)

a. Place the machine in the posture shown in the

figure.

W1-E008

V-23

TB175W

TROUBLESHOOTINTG

BOOM

b. Disconnect the head side hose (B) and let the

hydraulic oil out of the cylinder’s piping.

Insert a plug (2) in the disconnected hose.

• Test the left and right cylinders one at a

time. Remove both hoses from the cylinder

that is not being inspected at this time and

plug the disconnected hoses.

c. Operate the bucket and raise the machine’s

body.

At this time, if there is oil leaking from the

piping of the cylinder where the hose was

disconnected, and if the boom cylinder’s rod is

extended, the cylinder is leaking internally.

Also, if there is no leakage of oil from the

cylinder’s piping, if the boom cylinder’s rod is

extended, the control valve is leaking inter-

nally.

If the cylinder is damaged internally, the

system should be flushed out to remove any

W1-E008

broken pieces (NAS Class 9).

TB175W

V-24

BOOM

TROUBLESHOOTING

WHEN THE BOOM OPERATION LEVER IS PULLED GENTLY, THE BOOM DROPS TEMPORARILY.

Inspect the load check

Faulty

Repair or replace the housing

valve of the control valve.

block.

Normal

Inspect for internal leak-

Faulty

Repair or replace the boom

age in the boom cylinder.

cylinder.

1. Inspect the load check valve of the control

valve.

a. Disconnect the hose between the control valve

and boom cylinder at the control valve side.

b. Connect the disconnected hose to the arm or

bucket section.

c. Try operating the boom cylinder.

If operation is normal, the load check valve is

faulty.

Place the machine in the following posture

when performing the operation in “a~c” above.

• The bucket cylinder should be fully ex-

tended, the arm cylinder should be fully

retracted and the bucket should be low-

ered to the ground.

Reference: When the spool first starts to pull, the

oil’s pressure and flow are small, so if the load

check valve is faulty, it causes a load to bear on the

boom cylinder, which causes the oil to flow

backwards for a time. For this reason, the boom

will drop temporarily.

2. Inspect for internal leakage in the boom

cylinder.

When the boom cylinder’s piston or tube is faulty,

if oil is leaking from the head side (A) to the rod

side (B), since the oil’s pressure and flow are low

when the spool first starts pulling, the boom

cylinder will drop temporarily. Also, the cylinder

will have inadequate driving force. However, in

this case as well, the amount of natural drop will

be great.

• Cylinder Inspect

“V-23~24”

V-25

TB175W

TROUBLESHOOTING

BOOM

THE AMOUNT OF BOOM NATURAL DROP IS GREAT.

Is the amount of natural

Within the standard.

Normal

fall within the standard?

Not within the standard.

Inspect for internal leak-

Faulty

Repair or replace the boom

age in the boom cylinder.

cylinder.

Normal

Operation be-

Perform a port relief

came normal.

The port relief valve is

Repair or replace the port re-

valve switching test.

faulty.

lief valve.

Does not change.

The control valve is leaking

Replace the housing block.

internally.

1. Is the amount of natural drop within the

standard?

“II. Specifications, Standards for Judging

Performance”

2. Inspect for internal leakage in the boom

cylinder.

“V-23~24”

3. Perform a port relief valve switching test.

“V-21”

TB175W

V-26

BOOM

TROUBLESHOOTING

THE BOOM ADJUSTMENT CYLINDER DOESN’T MOVE.

Inspect the supply pres-

sure to the pilot valve

(swing).

Normal

Inspect the pilot valve

Faulty

Repair or replace the pilot

(swing).

valve (swing).

Normal

Inspect the operation of

Faulty

Repair or replace the housing

the spool.

block.

Normal

Faulty

Repair or replace the selector

Inspect the selector valve.

valve.

Normal

Inspect the port relief

Faulty

Repair or replace the port rerief

valve.

Normal

Inspect the boom adjust-

Faulty

Repair or replace the boom

ment cylinder.

adjustment cylinder.

1. Inspect the supply pressure to the pilot valve

5Pb1

(swing).

“V-7~8”

2. Inspect the pilot valve (swing).

Disconnect the hose between the pilot valve

(swing) and control valve on the control valve

5Pa1

side, then set a pressure gauge in the disconnected

hose.

• Operate the boom swing pedal and measure the

pressure.

BS2

• Depending the operation angle, if the pressure

BS1

is normal, it will range between 0~3.4 MPa.

W2E007

V-27

TB175W

TROUBLESHOOTING

BOOM

3. Inspect the operation of the spool.

Disconnect the hose between the control valve

(swing section) and the selector valve on the

selector valve side, then set a pressure gauge in

the disconnected hose.

5B1

5A1

• Operate the boom swing pedal and measure the

OP2

pressure.

• A pressure of 27.5 MPa is normal.

MA1

MA2

OP1

MA1

MP1

MB1

MA2

MP2

MB2

W2E008

4. Inspect the selector valve.

a. Inspect the fuse.

Operate the solenoid valve and check the fuse

for the power supply circuit.

b. Inspect the selector switch.

Press the selector switch to turn it “ON”. While

GRAY YELLOW

it is this condition, check if there is continuity

with a tester.

W2E009E

c. Inspect the relay.

Solenoid Valve (4-Section)

Press the selector switch to turn the relay to

Change and Speed Shift

“ON”. Check whether the voltage is applied to

the solenoid valve by using a tester. Be sure to

stop the engine before starting the inspection.

d. Inspect the solenoid valve.

“IV. Hydraulic Units, Solenoid Valves,

Swing/Adjust Cange”

W2E010E

TB175W

V-28

BOOM

TROUBLESHOOTING

e. Inspect the operation of the spool.

Disconnect the hose between the selector valve

and the cylinder on the selector valve side, then

set a pressure gauge in the disconnected hose.

• Operate the boom swing pedal and measure

5B1

5A1

the pressure.

OP2

• A pressure of 33.3 MPa is normal.

MA1

MA2

OP1

MP1

MA1

MB1

MA2

MP2

MB2

W2E011

5. Inspect the port relief valve.

“IV. Hydraulic Units, Port Relief Valve”

6. Inspect the boom adjustment cylinder.

“IV. Hydraulic Units, Cylinders”

V-29

TB175W

TROUBLESHOOTING

ARM

THE ARM CYLINDER DOESN’T MOVE.

Inspect the operation of

actuators other than the

arm cylinder.

Normal

Faulty

Repair or replace the pilot

Inspect the pilot valve.

valve.

Normal

Inspect the operation of

Faulty

Repair or replace the housing

the spool.

block.

Normal

Operation

Perform a port relief

became normal.

The port relief valve is

Repair or replace the port re-

valve switching test.

faulty.

lief valve.

Does not change.

Faulty

Repair or replace the arm cyl-

Inspect the arm cylinder.

inder.

1. Inspect the operation of actuators other than

the arm cylinder.

Inspect if the operation of the arm only is faulty by

Lever Operated

Places inspected

the table at right. If operation is faulty, inspect the

Swing

Relief Valve R1

Pump P2

main relief valve and the hydraulic pump.

“V-6”

2. Inspect the pilot valve.

“V-21”

TB175W

V-30

ARM

TROUBLESHOOTING

3. Inspect the operation of the spool.

Disconnect the arm hose connected to the pipe at

the boom foot, then set a pressure gauge in the

disconnected hose.

• Operate the (arm) lever and measure the pres-

sure.

• If the pressure is 27.5 MPa, it is normal.

4. Perform a port relief valve switching test.

Switch the port relief valve with that of the

normal boom. If the arm cylinder then operates,

the port relief valve is faulty.

W2E006

5. Inspect the arm cylinder.

Switch the arm hoses and bucket hoses connected

to the pipes at the boom foot.

• Try operating the (bucket) operation lever to

operate the arm cylinder.

• If the cylinder doesn’t operate, the cylinder is

faulty.

When performing the operation above, the

bucket cylinder should be fully extended, the

arm cylinder should be fully retracted, and

the bucket should be lowered to the ground.

V-31

TB175W

TROUBLESHOOTING

ARM

ARM CYLINDER OPERATION IS SLOW, OR THERE IS NO POWER.

Is the arm cylinder’s

Within the standard.

speed within the stan-

Normal

dard?

Not within the standard.

Faulty

Repair or replace the pilot

Inspect the pilot valve.

valve.

Normal

Inspect the operation of

Faulty

Repair or replace the housing

the spool.

block.

Normal

Operation

Perform a port relief

became normal.

The port relief valve is

Repair or replace the port re-

valve switching test.

faulty.

lief valve.

Does not change

Faulty

Repair or replace the arm cyl-

Inspect the arm cylinder.

inder.

1. Is the arm cylinder’s speed within the stan-

dard?

“II. Specifications, Standards for Judging

Performance”

2. Inspect the pilot valve.

“V-21”

3. Inspect the operation of the spool.

Stroke the spools of the boom [1] and boom [2]

sections and inspect whether they move smoothly,

or remove the spools and check whether there is

any foreign matter engaged in them.

4. Perform a port relief valve switching test.

“V-21”

TB175W

V-32

BUCKET

TROUBLESHOOTING

THE BUCKET CYLINDER DOESN’T MOVE, OR THERE IS NO POWER.

Inspect the operation of

actuators other than the

bucket cylinder.

Normal

Faulty

Repair or replace the pilot

Inspect the pilot valve.

valve.

Normal

Inspect the operation of

Faulty

Repair or replace the housing

the spool.

block.

Normal

Operation

Perform a port relief

became normal.

The port relief valve is

Repair or replace the port re-

valve switching test.

faulty.

lief valve.

Does not change.

Inspect the bucket cylin-

Faulty

Repair or replace the bucket

der.

cylinder.

1. Inspect the operation of actuators other than

the bucket cylinder.

Inspect if the operation of the bucket only is faulty

Lever Operated

Places inspected

by the table at right. If operation is faulty, inspect

Boom

Relief Valve R1

Pump P1

the main relief valve and the hydraulic pump.

“V-6”

2. Inspect the pilot valve.

“V-21”

3. Inspect the operation of the spool.

“V-21”

V-35

TB175W

TROUBLESHOOTING

BUCKET

4. Perform a port relief valve switching test.

When only “bucket load” side is inoperable:

Replace the port relief valve with that of the

normal boom, and test. If the bucket cylinder

operates, the replaced old port relief valve was

faulty.

W2E012

5. Inspect the bucket cylinder.

At the boom foot, exchange the arm hose with the

bucket hose that is connected to the pipe.

• Move the lever (arm) and check whether the

bucket cylinder operates.

• If the bucket cylinder does not operate, the

bucket cylinder is faulty.

This inspection should be done with the

bucket cylinder fully extended and the arm

cylinder fully retracted. Also, the bucket must

be lowered to the ground.

TB175W

V-36

BUCKET

TROUBLESHOOTING

THE AMOUNT OF BUCKET NATURAL DROP IS GREAT.

Is the amount of natural

Within the standard.

Normal

fall within the standard?

Not within the standard.

Inspect the bucket cylin-

Faulty

Repair or replace the bucket

der.

cylinder.

Normal

There is leakage inside

Replace the housing block.

the control valve.

1. Is the amount of natural drop within the

standard?

“II, Specifications, Standards for Judging

Performance”

2. Inspect the bucket cylinder.

a. Fully extend the bucket cylinder, fully retract

the arm cylinder and lower the bucket to the

ground,

b. Disconnect the 2 hoses connected to the cylin-

der.

Insert the plugs (1) in the disconnected hoses

and the piping.

c. Raise the boom and raise the hoe attachment so

that it floats above the ground, If the bucket

drops, the cylinder is faulty, If the bucket does

not drop, there is leakage inside the control

valve.

V-37

TB175W

TROUBLESHOOTING

BOOM SWING

THE SWING CYLINDER DOESN’T MOVE.

2-Piece Boom

Inspect the supply pres-

sure to the pilot valve

(swing).

Normal

Inspect the pilot valve

Faulty

Repair or replace the pilot

(swing).

valve (swing).

Normal

Inspect the operation of

Faulty

Repair or replace the housing

the spool.

block.

Normal

Faulty

Repair or replace the selector

Inspect the selector valve.

valve.

Normal

Inspect the swing cylin-

Faulty

Repair or replace the swing

der.

cylinder.

1. Inspect the supply pressure to the pilot valve

4. Inspect the selector valve.

(swing).

“V-28~29”

“V-7~8”

5. Inspect the swing cylinder.

2. Inspect the pilot valve (swing).

“IV. Hydraulic Units, Cylinders”

“V-27”

3. Inspect the operation of the spool.

“V-28”

TB175W

V-38

BOOM SWING

TROUBLESHOOTING

Mono Boom

Inspect the supply pres-

sure to the pilot valve

(swing).

Normal

Inspect the pilot valve

Faulty

Repair or replace the pilot

(swing).

valve (swing).

Normal

Inspect the operation of

Faulty

Repair or replace the housing

the spool.

block.

Normal

Faulty

Repair or replace the check

Inspect the check valve.

valve.

Normal

Inspect the swing cylin-

Faulty

Repair or replace the swing

der.

cylinder.

1. Inspect the supply pressure to the pilot valve

(swing).

“V-7~8”

2. Inspect the pilot valve (swing).

“V-27”

3. Inspect the operation of the spool.

Disconnect the hose between the control valve

(swing section) and the cylinder on the cylinder

side, then set a pressure gauge in the disconnected

hose.

• Operate the boom swing pedal and measure

the pressure.

• A pressure of 27.5 MPa is normal.

V-39

TB175W

ENGINE TROUBLE DIAGNOSTICS TOOL AND MAINTENANCE TOOL

1. Introduction

Our maintenance tools are designed to identify the causes of troubles so that machines can be quickly returned to

normal. We also offer a tool to adjust the quantity of oil in the service port for machines with an optional attachment,

to ensure safer maintenance work. These tools are offered only to the designated dealers, and are to be used by main-

tenance technicians with knowledge of computers, so the basic computer operations are not explained.

2. System overview

There are two main tools for maintenance: the engine trouble diagnostic tool provided by the engine manufacturer and

the maintenance tool provided by Takeuchi. Some of our machines have a control computer which can be connected

to a personal computer for communications, allowing computers to read or write data.

(1) Engine trouble diagnostic tool

This tool is used to diagnose troubles with the engine controller of machines with Tier 3-compliant engines and to

flash the engine control data. It can be purchased from the engine manufacturer, Isuzu or Yanmar. Tier 3-compliant

engines are electronically controlled by the Engine Control Unit (ECU) or Engine Control Module (ECM). These

controllers use data specific to Tier 3-compliant and regulation-approved engines, and the trouble diagnostic tool

is specifically designed for them; regular maintenance software for the controller intended for the whole machine

cannot be used.

In case of trouble, the engine trouble diagnostic tool is used to display the error codes and states, from which the

cause of trouble can be identified and action taken according to the engine manufacturerʼs manual.

To purchase the tool, contact our Sales or Parts department.

For details of the tool, read the userʼs manual of the manufacturer.

The maintenance software is permitted to be used only by licensed manufacturers and service dealers.

(2) Maintenance tool and maintenance software

This tool is used to read data from the machine controller and to adjust peripheral devices.

• Reading the error codes stored in the Takeuchi Electrical Control Unit (T-ECU)

Past trouble details can be read or deleted.

∗ For the details of error codes, refer to the manual included in the software CD and the maintenance manual.

• Reading the parameters and writing the modified data in the proportional amplifier for the service port

The proportional output for the first/second auxiliary line can be modified.

The operation speed of various attachments can be modified.

• It is possible to read each serial number and the software version of the controller connected to the device.

The serial number of the controller is necessary for manufacturing management or for troubleshooting.

Machine maintenance tool and trouble analysis tool

Engine manufacturer

Takeuchi maintenance tool

Emission

Develop-

Machine Ser.

maintenance tool

Model

standards

ment code

No.

Software CD

Engine

Name

Kit part No. *1

Description of software

part No.

17830001

TB180FR

F14C

later

15830001

• T-ECU maintenance soft-

F10C

17301-42800

17301-42700

later

ware

TB153FR

15820001

F10B

later

51410001

• T-ECU maintenance soft-

TB1140

A25B

later

ware

17301-42810

17301-42660

• Maintenance software for

51430001

TB1140

A25D

the proportional amplifier

later

of the service port

22400001

TL240

T-3

L8B

Yanmar

EDT

later

22300001

TL230

T-3

L6B

Yanmar

EDT

later

22200001

TL220

T-3

L5B

Yanmar

EDT

later

17840001

• T-ECU maintenance soft-

TB180FR

T-3

F14E

Yanmar

EDT

17301-42820

17301-42690

later

ware

17530001

TB175

T-3

A14E

later

• T-ECU maintenance soft-

Yanmar

EDT

17301-42830

17301-42680

17540001

ware

TB175W

T-3

A14EW

later

• T-ECU maintenance soft-

ware

• Controller

management

51420001

TB1140

T-3

A25C

Isuzu

EMPS-3

17301-42840

17301-42670

software

later

• Maintenance software for

the proportional amplifier

of the service port

• T-ECU maintenance soft-

ware

• Controller

management

A14E

Monitor ma-

TB175

T-3

Isuzu

EMPS-3

17301-42850

17301-42710

software

Isuzu

chines

• Maintenance software for

the proportional amplifier

of the service port

*1 The kit includes the USB cable assembly to be used to connect to the controller. (Part No.: 17301-42720)

T-ECU: Takeuchi-Electrical Control Unit (Takeuchi)

EDT: Engine Diagnostic Tool (Yanmar)

EMPS-3: Engine Module Programming System (Isuzu)

(2) Connection diagram for A25B and A25D

T-ECU: Takeuchi-Electrical Control Unit

Excavator

Engine model: 4BG1TRE (Isuzu)

TB1140 (A25B)

Compliant with Tier 2 emission standards

Serial No. 51410001 or later

TB1140 (A25D)

Serial No. 51430001 or later

Laptop computer

Engine

(Isuzu)

(Takeuchi)

Interface box

Proportional ampli-

fier for the service

Connection

port (Takeuchi)

upon selection

Optional for A25D

Takeuchi maintenance tool

Configuration

ᶃ Maintenance software CD (Part No. 17301-42660)

ᶄ Dedicated USB cable (Part No. 17301-42720)

Takeuchi Gear Box 357A10. Service Manual (1998) - page 3