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Takeuchi Hydraulic Excavator TB175W (S/N 17540001~). WORKSHOP MANUAL - page 3

II-16

SPECIFICATIONS

STANDARDS FOR JUDGING PERFORMANCE

Dozer Blade

Measuring Method

• Engine

: Maximum r.p.m.

• Hydraulic Oil Temp. : 50~60°C

• Mount the pressure gauge on the pressure detec-

tion port, operate the desired hydraulic circuit and

measure the relief pressure.

Adjusting Method

1. Loosen locknut (2), then begin adjusting pres-

sure by turning setting screw (1).

Turning clockwise ................ raises the set pressure.

Turning counterclockwise .... lowers the set pressure.

2. In order to keep the setting screw from turning

after pressure has been adjusted, tighten the

locknut while at the same time holding the set-

ting screw ﬁrmly in place.

3. Operate the relief valve once more to conﬁrm

that the pressure that has been set it stabilized.

Circuit

Pressure Detection Port

Relief

Valve

Port Position

Size

Dozer Blade

G1/4

II-17

SPECIFICATIONS

STANDARDS FOR JUDGING PERFORMANCE

Hydraulic Oil Pressure (Slewing Relief Valve

Set Pressure)

Measuring Method

• Engine

: Maximum r.p.m.

• Hydraulic Oil Temp. : 50~60°C

• Mount the pressure gauge on the pressure de-

tection port and set a solid obstacle so that the

upperstructure cannot slew in the direction to be

measured. Next, operate the circuit to be mea-

sured and measure the relief pressure.

Adjusting Method

1. Loosen locknut (2), then begin adjusting pres-

sure by turning setting screw (1).

Turning clockwise ................ raises the set pressure.

Turning counterclockwise .... lowers the set pressure.

2. In order to keep the setting screw from turning

after pressure has been adjusted, tighten the

locknut while at the same time holding the set-

ting screw ﬁrmly in place.

3. Operate the relief valve once more to conﬁrm

that the pressure that has been set it stabilized.

Circuit

Pressure Detection Port

Relief

Valve

Port Position

Size

Right Slew

G1/4

SR1

Left Slew

G1/4

SR2

II-18

SPECIFICATIONS

STANDARDS FOR JUDGING PERFORMANCE

Hydraulic Oil Pressure (Pilot Relief Valve

Set Pressure)

Measuring Method

• Engine

: Maximum r.p.m.

• Hydraulic Oil Temp. : 50~60˚C

• Mount pressure gauge on the pressure detection

port and measure the pilot relief pressure.

Pressure Adjustment

The relief valve pressure is set at the factory. Do not

adjust it unless necessary.

1. Remove the cap screws, and then remove the

cover (1).

2. Remove the spring (2) and the plunger (3).

3. Adjust the pressure with the shims (4)

Shim thickness ..........0.2 mm

Shim thickness ..........0.5mm

4. Upon completion of the pressure adjustment,

assemble the relief valve and conﬁrm that the

relief valve set pressure is stable.

Cap Screw: 3.92 N·m

Hydraulic Oil Pressure (Steering Relief Valve

Set Pressure)

Measuring Method

• Engine

: Maximum r.p.m.

• Hydraulic Oil Temp. : 50~60˚C

• Mount pressure gauge on the pressure detection

port and measure the pilot relief pressure.

Pressure Detection Port

Relief Valve

Port Position

Size

G1/4

––

0.2 mm Remove Decrease of approx. 0.13 MPa

Add

Increase of approx. 0.13 MPa

0.5 mm Remove Decrease of approx. 0.31 MPa

Add

Increase of approx. 0.31 MPa

Pressure Detection Port

Relief Valve

Port Position

Size

G1/4

II-19

SPECIFICATIONS

STANDARDS FOR JUDGING PERFORMANCE

Slew Time

• Engine

: Maximum r.p.m.

• Hydraulic Oil Temp. : 50~60°C

• Measurement Posture : Completely retract the

arm cylinder, fully extend the bucket cylinder and

adjust so that boom foot pin and bucket pin are

at matching height. Rest the dozer blade on the

ground.

• With the hoe attachment in a no-load state, wait

1 rotation, then measure the time required for the

next 2 rotations.

Overrun When Slewing Stops

• Engine

: Maximum r.p.m.

• Hydraulic Oil Temp. : 50~60°C

• Measurement Posture : Same as that for measur-

ing slew time.

• Draw matching marks on the outer race of the

slew bearing and lower frame at an exactly 180

degrees rotation from the starting point. With the

hoe attachment in a no-load state, rotate 180 de-

grees at, which point return the operation lever

to neutral. Measure the differential between the

position marks and the point the hoe attachment

stops.

Natural Slew Drop

• Engine

: Stopped

• Hydraulic Oil Temp. : 50~60°C

• Grade

: 15°

• Measurement Posture : Same as that for measur-

ing slew time.

• Rotate the upper machinery so that it is directly

abeam of the grade, then draw positional marks

on the slew bearingʼs outer race and the lower

frame. Then measure the distance that develops

between the marks after 5 minutes.

Boom Cylinder Speed

• Engine

: Maximum r.p.m.

• Hydraulic Oil Temp. : 50~60°C

• Measurement Posture : Completely retract the

arm cylinder, fully extend the bucket cylinder and

rest the dozer blade on the ground.

• Then measure the time required for the bucket to

reach its highest elevation point (lowest point)

from its lowest point (highest point) resting on the

ground. (Do not include the cushioning time.)

II-20

SPECIFICATIONS

STANDARDS FOR JUDGING PERFORMANCE

Arm Cylinder Speed

• Engine

: Maximum r.p.m.

• Hydraulic Oil Temp. : 50~60°C

• Measurement Posture : Completely retract the

arm cylinder, fully extend the bucket cylinder,

position the arm horizontally and rest the dozer

blade on the ground.

• Then measure the time required for the arm cyl-

inder to completely retract (extend) from a fully

extended state (retracted state).

Bucket Cylinder Speed

• Engine

: Maximum r.p.m.

• Hydraulic Oil Temp. : 50~60°C

• Measurement Posture : Completely retract the

arm cylinder, position the arm horizontally and

rest the dozer blade on the ground.

• Then measure the time required for the bucket

cylinder to completely retract (extend) from a

fully extended state (retracted state).

Dozer Blade Cylinder Speed

• Engine

: Maximum r.p.m.

• Hydraulic Oil Temp. : 50~60°C

• Measurement Posture : Using the hoe attachment,

lift up the dozer blade end of the excavator.

• Then, raising and lowering the dozer blade full

stroke, measure the time required per stroke in

each direction.

Swing Cylinder Speed

• Engine

: Maximum r.p.m.

• Hydraulic Oil Temp. : 50~60°C

• Measurement Posture : Same as that for measur-

ing slew time.

• While swinging the boom left (right) to right

(left), measure the time required for a full stroke

each way.

(Do not include the cushioning time.)

II-21

SPECIFICATIONS

STANDARDS FOR JUDGING PERFORMANCE

Adjust Cylinder Speed

• Engine

: Maximum r.p.m.

• Hydraulic Oil Temp. : 50~60°C

• Measurement Posture : Completely retract the

arm cylinder, fully extend the bucket and boom

cylinders, position the arm horizontally and rest

the dozer blade on the ground.

• Then measure the time required for the adjust cyl-

inder to completely retract (extend) from a fully

extended state (retracted state).

Natural Cylinder Drop

Boom, Arm, Bucket, Dozer Blade, Bucket Tip

• Engine

: Maximum r.p.m.

• Hydraulic Oil Temp. : 50~60°C

• Measurement Posture : Completely retract the

dozer blade and arm cylinders, fully extend the

bucket cylinder and adjust the bucket pin position

to the same height as the boom foot pin.

• Maintain this position for 10 minutes, then mea-

sure the change in rod length and the distance the

bucket tip falls.

Swing Cylinder

• Engine

: Stopped

• Hydraulic Oil Temp. : 50~60˚C

• Grade

: 15˚

• Measurement Posture : Same as that for measur-

ing slew time.

• Rotate the upper machinery so that it is directly

abeam of the grade, then measure the change in

rod length after 5 minutes.

II-22

SPECIFICATIONS

STANDARDS FOR JUDGING PERFORMANCE

III-

TB175W

III .

MACHINE CONFIGURATION

III-

MACHINE CONFIGURATION

TB175W

CONTENTS

Drive System ...........................................................................................................................................................3

Slew System ............................................................................................................................................................9

Travel System ....................................................................................................................................................... 11

Upper Frame .........................................................................................................................................................13

Control System......................................................................................................................................................21

Attachments ..........................................................................................................................................................27

Hydraulic System ..................................................................................................................................................33

Electrical System ..................................................................................................................................................37

Air Conditioner System ........................................................................................................................................44

MACHINE CONFIGURATION

DRIVE SYSTEM

III-

TB175W

1.  Engine Foot FL
2.  Engine Foot FR
3.  Engine Foot RL
4.  Engine Foot RR
5.  Stopper
6.  Stopper
7.  Cushion Rubber
8.  Cushion Rubber

9.  Ground Cable
10.  Bracket
11.  Exhaust Pipe
12.  Pipe
13.  Bracket
14.  Silencer
15.  Gasket
16.  Gasket

4 N·m

9 N·m

55 N·m

Apply thread-locking compound.

E: “A” Mark
F:

N·m

.9 N·m

III-

DRIVE SYSTEM

CONSTRUCTION

Engine Mount 1/2

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MACHINE CONFIGURATION

DRIVE SYSTEM

III-4

TB175W

Engine Mount 2/2

.9 N·m

4.9 N·m

1.  Bracket
2.  Air Cleaner
3.  Hose
4.  Hose
5.  Pipe
6.  Pipe
7.  Pipe
8.  Pipe
9.  Hose
10.  Hose
11.  Drain Vave

12.  Hose
13.  Hose
14.  Hose
15.  Sub Tank
16.  Bracket
17.  Plate
18.  Hose
19.  Sensor
20.  Joint
21.  Hose

III-4

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MACHINE CONFIGURATION

DRIVE SYSTEM

III-5

TB175W

III-5

Radiator and Oil Cooler

1. Stay
2. Stay
3. Shroud
4. Plate
5. Plate
6. Plate
7. Net

8. Bracket
9. Bracket

10. Guard
11. Cushion Rubber
12. Radiator

and

Oil Cooler

13. Cushion Rubber
14. Guard

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MACHINE CONFIGURATION

DRIVE SYSTEM

III-

TB175W

Pump Coupling

1. Engine Housing
2. Hydraulic Pump
3. Hab
4. Gear Pump

A: Supply molybdenum disulfide grease.

8 N·m

54.9 N·m

55.8 N·m

Travel, Bucket, Boom[1], Arm[2]

Travel, Auxiliary, Boom[2], Arm[1], Swing

Outrigger, Slew, Auxiliary

Steering, Brake

Pilot Pressure

The pump coupling connects the engine flywheel

and the hydraulic pump’s drive shaft. It is construct-
ed so that it absorbs vibrations, torsions, impact and
out of center of the engine and hydraulic pump.

• Refer to the table concerning the responsibility

of each of the pumps shown in the drawing at
right.

III-

W2C104

P3 P4