Takeuchi Hydraulic Excavator TB175 (No. 17512105~). Operator's Manual (2007)

112

MAINTENANCE

After First 50 Hours (New Machines Only)

1. Remove cap nut (2).
2. Press button (3) and bleed the air from

the tank.

3. Tighten securely by hand with cap nut (2).
4. Loosen the bolts, and remove the flange

(4).

5. Remove the return filter (5).
6. Install the new return filter.
7. Install the flange (4).
8. Inspect the level with the sight gauge (6),

and replenish if the level is low.
Refer to page 109 “Inspecting the
Hydraulic Oil Level and Replenishing”.

Replacing the Hydraulic Oil
Return Filter

WARNING

Stop the engine and allow the machine
to cool down before performing
maintenance.
• The engine, hydraulic lines and many

other parts of the machine are hot
directly after the engine is stopped.
Touching these parts will cause
burns.

• The hydraulic fluid is also hot and

under high pressure.
Be careful when loosening caps and
plugs. Working on the machine under
these conditions could result in
burns or injuries due to the hot oil
spurting out.

Never jump off the machine. Use the
steps and handrails when climbing on
and off the machine, and always
support your body at three points with
your hands and feet.

Oil may spurt out if caps or filters are
removed or pipes disconnected before
releasing the pressure in the hydraulic
system.
• Gradually press the air breather

button to relieve tank pressure.

• When removing plugs or screws or

disconnecting hoses, stand to the
side and loosen slowly to gradually
release the internal pressure before
removing.

3
1

L3G008

113

MAINTENANCE

2. Loosen the bolts and remove the under

cover.

3. Place a pan for catching the spent oil

under the drain plug (3).

4. Remove cap (A), install connector (B) and

drain the oil. (The oil comes out when the
screw is tightened.)

5. Remove connector (B) and install cap (A).

IMPORTANT: Check the spent oil. If it
contains large amounts of metal powder,
consult a Takeuchi sales or service outlet.

6. Install the under cover.

7. Open the maintenance cover.
8. Using a filter wrench, turn the filter (4)

counterclockwise and remove it.

9. Clean the surface of installation of the filter

stand.

10. Apply a thin layer of oil to the packing of

the new filter.

11. Install the new filter by hand.
12. Tighten 3/4 more turn with the filter

wrench after the filter packing comes in
contact with the surface of installation.

13. Supply oil up to the upper limit (H) of the

dipstick (1). Problems could arise if the
oil level is either too low or too high.

14. Tighten the oil supply cap (2).
15. Start the engine, run it at low idle for about

3 minutes, then stop it.

16. After about 10 minutes, inspect the oil

level.

After First 50 Hours (New Machines Only)

Replacing the Engine Oil and Oil
Filter

WARNING

Stop the engine and allow the machine
to cool down before performing
maintenance.
• The engine, muffler, radiator and

many other parts of the machine are
hot directly after the engine is
stopped. Touching these parts will
cause burns.

• The engine oil is also hot.

Be careful when loosening caps and
plugs. Working on the machine under
these conditions could result in
burns.

Never jump off the machine. Use the
steps and handrails when climbing on
and off the machine, and always
support your body at three points with
your hands and feet.

1. Open the engine hood and remove the oil

supply cap (2).

L3G005

L3G025

L3G030

114

MAINTENANCE

After First 50 Hours (New Machines Only)

Adjustment

1. Loosen the locking nut (6).
2. Turn the adjustment bolt (5) and adjust the

fan belt (4).
• Tighten: Clockwise
• Loosen: Counterclockwise

3. Tighten the locking nut (6).

Inspecting and Adjusting the Fan
Belt

WARNING

Stop the engine and allow the machine
to cool down before performing
inspection and maintenance.

The engine, muffler, radiator, hydraulic
lines, sliding parts and many other
parts of the machine are hot directly
after the engine is stopped. Touching
these parts will cause burns.

Inspection
1. Open the engine hood.

2. Press at the center of the fan pulley (2)

and alternator pulley (3) and check the
tension (about 98 N or 22 lbs.).
The slack (A) should be about 7 to 10 mm
(0.28 to 0.4 in.).

3. Inspect the fan belt (4) and replace it if:

• there are cuts or cracks.
• the belt is worn and touches the bottom

of the V groove in the pulley.

• the belt stretches and cannot be

adjusted.

115

MAINTENANCE

Every 50 Hours

2. Use the operating devices to lift the body.

Operate the levers slowly.

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

bottom surface of the frame at the center
of the crawler frame and the top surface
of the crawler.
The gap (A or B) should be within the
following range:
(A) Rubber crawler:

160 to 180 mm (6.3 to 7.1 in.)

(B) Steel crawler:

260 to 280 mm (10.2 to 11.0 in.)

(B) Segment rubber crawler:

245 to 265 mm (9.6 to 10.5 in.)

Adjustment
This machine uses a hydraulic cylinder to
adjust the tension of the crawler belts. Note
that it is not necessary to regularly perform
adjustments of the tension of the belt itself.

Inspecting the Crawler Tension

WARNING

If you must work beneath the raised
machine or equipment, always use wood
blocks, jack-stands or other rigid and
stable supports. Never get under the
machine or working equipment if they are
not sufficiently supported. This
procedure is especially important when
working on hydraulic cylinders.

Inspection

1. For rubber crawlers, move the machine

so that the “M” or “

∞

” mark at the coupling

is at the top center of the crawler frame.

E4G0192

E4G0201

A B

116

MAINTENANCE

Every 50 Hours

Lubricating the Slew Bearing

WARNING

Do not slew while lubricating. Doing so
is dangerous, as you may get caught in
the machine.

1. Stop the engine with the machine in the

posture shown on the diagram above.

2. Use the grease gun to supply grease to

the grease nipple (1).

3. Start the engine, lift the bucket and slew

clockwise 90

4. Ground the bucket and stop the engine.

5. Repeat steps 2 to 4 above three times.
6. Wipe off the grease expelled from the slew

bearing and grease nipple.

L3G011

L3G012

E4G026

117

MAINTENANCE

Every 50 Hours

Inspecting the Battery Fluid Level
and Replenishing

DANGER

Do not use the battery when the fluid
level is below the lower level. Doing so
will hasten the deterioration of the
internal portions of the battery and
shorten the battery life, and can also
cause rupturing (or an explosion).

Batteries generate flammable and
explosive gases. Keep arcs, sparks,
flames and lighted tobacco away.

Use a dampened cloth to clean the area
of the fluid level lines and check the
fluid level. Note that if this area is
cleaned with a dry cloth, static
electricity could cause ignition or
explosion.

WARNING

Do not fill the battery above the upper
level. Doing so could cause the fluid
to leak, contact and damage the skin,
or cause parts to corrode.

Batteries contain sulfuric acid which
will damage eyes or skin on contact.
• If acid contacts eyes, flush

immediately with clean water and get
prompt medical attention.

• If acid is accidentally swallowed,

drink large quantities of water or milk
and call a physician immediately.

• If acid contacts skin or clothing, wash

off immediately with clean water.

Inspection
IMPORTANT: Check the fluid level of all
cells, even when the fluid level can be
checked by indicator.

1. Open the left side cover.

2. Inspect the indicator (1).

• Blue: Good
• White: Charging needed
• Red: Insufficient battery fluid

3. Inspect the fluid level.

The fluid level should be between the lines
indicating the upper level (H) and lower
level (L). If not, add distilled water up to
line (H).

If the fluid level can not be checked by
fluid level lines.

Remove the caps (2) and look into the fluid
supply holes to check the fluid level. If the
fluid is below the sleeve (3), be sure to add
distilled water up to the bottom edge of the
sleeve (3).
Proper amount .... (A)

The fluid reaches up to the bottom edge
of the sleeve (3), so the surface tension
causes the fluid to swell and the plate
appears distorted.

Level too low ....... (B)

The fluid does not reach up to the bottom
edge of the sleeve (3), so the plate
appears laminar, not distorted.

4. Also check the terminals for looseness and

dirt.

118

MAINTENANCE

Every 50 Hours

Draining the Fuel Tank

WARNING

Never jump off the machine. Use the
steps and handrails when climbing on
and off the machine, and always
support your body at three points with
your hands and feet.

Do not smoke or permit open flames
while handling fuel or working on the
fuel system.

Stop the engine in a well-ventilated
place and allow it to cool down before
performing maintenance.

Clean up spilled fuel immediately.

Do this before operating the machine.

1. Remove the fuel filler cap (2).
2. Place a pan under the drain cock (3).
3. Open the drain cock (3) and drain the water

and sediment from the bottom of the tank.

4. Close the drain cock (3).
5. While watching the fuel gauge (1), supply

fuel.

6. Tighten the fuel filler cap (2) supply lock it

with the key.

7. Bleed the air.

Bleeding the air from the fuel system
Refer to page 145 “Bleeding the Air from the
Fuel System”.
Supplement: Air in the fuel system can
make it difficult to start the engine and cause
engine problems. Also bleed the air when
the fuel tank is emptied.

L3G006

Replenishing
When adding distilled water, do so before
starting operations in order to prevent
freezing.
1. Remove the caps (2), and add distilled

water until the upper level (H).

2. Inspect the indicator (1) then it turns blue.
3. Clean the cap’s exhaust hole, then tighten

the caps (2) securely.

119

MAINTENANCE

After First 250 Hours (New Machines Only)

Replacing the Travel Motor Gear
Oil

WARNING

Stop the engine and allow the machine
to cool down before performing
maintenance.
• The travel motors are hot directly

after the engine is stopped. Touching
them will cause burns.

• The gear oil is also hot and under

high pressure.
Be careful when loosening plugs.
Working on the machine under these
conditions could result in burns or
injuries.

The pressure in the travel motor
reduction gears case may cause oil or
the plug to fly out. Loosen the plug
slowly to release the pressure.

IMPORTANT: If the percentage of the
traveling time within the total operating
time is high, replace the gear oil earlier
than the specified time.

1. Set the travel motor so that plug (1) is at

the very bottom.

2. Place a pan for catching the spent oil

under plug (1).

3. Remove plugs (1), (2) and (3) and drain

the oil.

4. Wrap new sealing tape around the plugs.
5. Tighten plug (1).
6. Supply oil through the hole for plug (3) until

oil flows out of the hole of plug (2).

7. Tighten plugs (2) and (3).

L3G015

120

MAINTENANCE

1. Open the left side cover.

2. Loosen the clamps (1) and remove the

dust cup (2).

3. Clean the inside of the dust cup (2).
4. Remove the outer element (3).

Do not remove and clean the inner
element (5).

5. Clean the inside of the body (4).

6. Clean the outer element (3) with dried

compressed air {294 to 490 kPa (43 to 71
psi)}.
First blow the air from the inside of the
element along the flutes, then blow the air
from the outside, and finally from the inside
again.

Replacing the Engine Oil and Oil
Filter

Refer to page 113 “Replacing the Engine Oil
and Oil Filter”.

Inspecting and Adjusting the Fan
Belt

Refer to page 114 “Inspecting and Adjusting
the Fan Belt”.

Cleaning the Air Cleaner

WARNING

Stop the engine and allow the machine
to cool down before performing
maintenance.
• The engine, muffler, radiator and

many other parts of the machine are
hot directly after the engine is
stopped. Touching these parts will
cause burns.

Wear required appropriate equipment
such as safety glasses and filter mask
when using compressed air, as metal
fragments or other objects can fly and
cause serious personal injury.

IMPORTANT: Be careful not to scratch
the element. Do not use an element if it is
damaged.
IMPORTANT: When operating the
machine in very dusty places, inspection
and maintenance should be performed
every day.

Every 250 Hours

L3G016

E4G033

121

MAINTENANCE

7. Light up the inside of the outer element

(3) with a bulb, inspect it, and replace it if
there are small holes or thin spots.

8. Install the outer element (3).
9. Install the dust cup (2) with the “TOP” mark

at the top, then fasten it with the clamps
(1).

Every 250 Hours

E4G034

Cleaning the Radiator Fins and
Oil Cooler Fins

WARNING

Wear required appropriate equipment
such as safety glasses and filter mask
when using compressed air, as metal
fragments or other objects can fly and
cause serious personal injury.

IMPORTANT: Be careful not to damage
the radiator fins and oil cooler fins when
cleaning them.

When using compressed air or
pressurized water, make sure the
pressure is no higher than 200kPa (28
psi) and hold the nozzle sufficiently
away from the fins.

IMPORTANT: When using water, cover
the electrical system to prevent water
from getting in.
IMPORTANT: When operating the
machine in very dusty places, inspection
and maintenance should be performed
every day.

1. Open the left side cover and the engine

hood.

2. Blow compressed air on the radiator fins

and oil cooler fins to remove mud and dirt
stuck on them.

L3G017

122

MAINTENANCE

Replacing the Fuel Filter

WARNING

Do not smoke or permit open flames
while handling fuel or working on the
fuel system.

Stop the engine in a well-ventilated
place and allow it to cool down before
performing maintenance.

Clean up spilled fuel immediately.

1. Open the right side cover.
2. Using a filter wrench, turn the filter (1)

counterclockwise and remove it.

3. Clean the surface of installation of the filter

stand.

4. Apply a thin layer of oil to the packing of

the new filter.

5. Install the new filter by hand.
6. Tighten 2/3 more turn with the filter wrench

after the filter packing comes in contact
with the surface of installation.

7. Bleed the air.

Refer to page 145 “Bleeding the Air from
the Fuel System”.

Replacing the Hydraulic Oil
Return Filter

Refer to page 112 “Replacing the Hydraulic
Oil Return Filter”.

Every 500 Hours

L3G031

123

MAINTENANCE

Every 500 Hours

Replacing the Water Separator
Filter

WARNING

Do not smoke or permit open flames
while handling fuel or working on the
fuel system.

Stop the engine in a well-ventilated
place and allow it to cool down before
performing maintenance.

Clean up spilled fuel immediately.

1. Open the right side cover.
2. Place a pan under the drain hose.
3. Open the drain cock (1) and drain the fuel.
4. Remove the sensor (2).
5. Remove and discard the filter (3).
6. Install the sensor (2) on the new filter.
7. Clean the surface of installation of the filter

stand.

8. Apply a thin layer of oil to the packing of

the new filter.

9. Install the new filter by hand.
10. Tighten 2/3 more turn with the filter

wrench after the filter packing comes in
contact with the surface of installation.

11. Bleed the air.

Refer to page 145 “Bleeding the Air from
the Fuel System”.

L3G032

124

MAINTENANCE

Every 1000 Hours

1. Open the left side cover and the engine

hood.

2. Gradually loosen the radiator cap (3) to

release the internal pressure, then
remove.

3. Place a pan for catching the spent coolant

under the drain plug (4), then loosen the
drain plug (4) and drain the coolant.

4. Tighten the drain plug (4).
5. Add tap water through the radiator’s

coolant supply port up to the top of the
port. Take your time doing this, adding the
water slowly to avoid any air from entering
the radiator.

6. Close the radiator cap (3).
7. Start the engine and run it at a speed

slightly above low idling. Raise the water
temperature to at least 90

C, then run the

engine for about 10 minutes with the
thermostat open.

8. Stop the engine, let the water’s

temperature lower, then loosen the drain
plug (4) and drain the water.

Cleaning the Engine Cooling
System

WARNING

Stop the engine and allow the machine
to cool down before performing
maintenance.
• The engine, muffler, radiator and

many other parts of the machine are
hot directly after the engine is
stopped. Touching these parts will
cause burns.

• The engine coolant is also hot and

under high pressure. Be careful
when loosening caps and plugs.
Working on the machine under these
conditions could result in burns or
injuries due to the hot coolant
spurting out.

If maintenance must be performed with
the engine running, always work as a
two person team with one person
sitting in the operator’s seat while the
other works on the machine.
• When performing maintenance, be

sure to keep your body and clothing
away from moving parts.

Standing at the back of the machine
while the engine is running is extremely
dangerous, as the machine could move
suddenly. Never stand at the back of
the machine while the engine is
running.

Do not remove the radiator cap or drain
plugs when the coolant is hot. Stop the
engine, let the engine and radiator cool
and loosen the radiator cap or drain
plugs slowly.

When cleaning, if the temperature of the
coolant is low, the thermostat will be closed
and the coolant will not circulate in the
radiator. Heat the coolant water to at least
90

C before cleaning.

FULL

L3G004

LOW

L3G020

125

MAINTENANCE

Every 1000 Hours

Replacing the Air Cleaner
Elements

WARNING

Stop the engine and allow the machine
to cool down before performing
maintenance.

The engine, muffler, radiator and many
other parts of the machine are hot
directly after the engine is stopped.
Touching these parts will cause burns.

IMPORTANT: Do not use an element if its
flutes, gaskets or seals are damaged.

1. Open the left side cover.

2. Loosen the clamps (1) and remove the

dust cup (2).

3. Clean the inside of the dust cup (2).
4. Remove the outer element (3).

Do not yet remove inner element (5).

5. Clean the inside of the body (4).
6. Remove the inner element (5).
7. Install the new elements.
8. Install the dust cup (2) with the “TOP” mark

at the top, then fasten it with the clamps
(1).

L3G016

9. After draining the water, clean using

cleaning agent. Clean following the
instructions included with the cleaning
agent you are using.

10. Repeat steps 4 to 8 to rinse the cooling

system.

11. Tighten the drain plug (4).
12. Slowly add the new coolant (mixture of

antifreeze and tap water) through the
radiator’s coolant supply port up to the
top of the port. Take your time doing this.

13. Close the radiator cap (3).
14. Warm up the engine. Use the meters to

check that there are no irregularities in
the cooling system at this time.

15. Raise the water temperature to at least

C, then run the engine as such for

about 10 minutes.

16. Stop the engine, let the water ’s

temperature lower, then check the level
of coolant in the radiator, and replenish
up to the top of the coolant supply port.

17. Close the radiator cap (3).
18. Clean the interior of the reserve tank (1),

then add coolant to the upper limit (H).

19. After replacing the coolant, inspect the

coolant level once again after operating
the machine.
The coolant permeates the entire system
during operation, so the level decreases.
Replenish by the amount the level has
decreased.

126

MAINTENANCE

Every 1000 Hours

Inspecting and Adjusting the
Engine Valve Clearance

This operation requires experience. Have it
performed by a Takeuchi sales or service
outlet.

Retightening the Engine Cylinder
Head Bolts

This operation requires experience. Have it
performed by a Takeuchi sales or service
outlet.

Inspecting the Engine Fuel
Injection Pressure and Spray
Condition

This operation requires experience. Have it
performed by a Takeuchi sales or service
outlet.

Replacing the Travel Motor Gear
Oil

Refer to page 119 “Replacing the Travel
Motor Gear Oil”.

Replacing the Air Breather Filter

WARNING

Never jump off the machine. Use the
steps and handrails when climbing on
and off the machine, and always
support your body at three points with
your hands and feet.

Oil may spurt out if caps or filters are
removed or pipes disconnected before
releasing the pressure in the hydraulic
system.
• Gradually press the air breather

button to relieve tank pressure.

1. Remove cap nut (N) on the air breather.
2. Press botton (T) and bleed the air from

the tank.

3. Remove seal washers (W) and nut (G).
4. Remove cover (H).
5. Replace filter (A), making sure it is in the

proper direction.

6. Line up the cut section of body (B) and

cover (H) and install.

7. Install seal washers (W) and nut (G).
8. Tighten securely by hand with cap nut (N).

L2G023

127

MAINTENANCE

Every 2000 Hours

Replacing the Hydraulic Oil and
Cleaning the Suction Strainer

WARNING

Stop the engine and allow the machine
to cool down before performing
maintenance.
• The engine, hydraulic lines and many

other parts of the machine are hot
directly after the engine is stopped.
Touching these parts will cause
burns.

• The hydraulic fluid is also hot and

under high pressure.
Be careful when loosening caps and
plugs. Working on the machine under
these conditions could result in
burns or injuries due to the hot oil
spurting out.

Never jump off the machine. Use the
steps and handrails when climbing on
and off the machine, and always
support your body at three points with
your hands and feet.

Oil may spurt out if caps or filters are
removed or pipes disconnected before
releasing the pressure in the hydraulic
system.
• Gradually press the air breather

button to relieve tank pressure.

• When removing plugs or screws or

disconnecting hoses, stand to the
side and loosen slowly to gradually
release the internal pressure before
removing.

1. Slew 45

clockwise and set the machine

to the hydraulic oil level inspection posture.
Refer to page 109 “Inspecting the
Hydraulic Oil Level and Replenishing”.

2. Remove cap nut (2).
3. Press button (3) and release the pressure

in the tank.

4. Replace the air breather filter (A).

Refer to page 126 “Replacing the Air
Breather filter”.

5. Remove the plug (10).
6. Loosen the bolts, and remove the flange (4).
7. Remove the return filter (5).
8. Place a pan for catching the spent oil

under the drain plug (7).

9. Loosen the drain plug (7) and drain the

hydraulic oil.

10. Loosen the bolts, and remove the flange

(8).

11. Remove the suction strainer (9) and

clean it.

12. Clean the inside of the hydraulic tank.
13. Install the new return filter and suction

strainer (9).

14. Install the flanges (4) and (8).
15. Tighten the drain plug (7).
16. Supply hydraulic oil up to the middle of

the sight gauge (6) from the hole of plug
(10).

17. Tighten the plug (10).

3
1

L3G008

Takeuchi Hydraulic Excavator TB175 (No. 17512105~). Operator's Manual (2007) - page 8