Takeuchi compact excavator TB125, TB135, TB145 / diesel TNE / diesel Yanmar. Service Manual

IV-146

HYDRAULIC UNITS

TRAVEL MOTOR

TB125, 135, 145

DISASSEMBLY AND ASSEMBLY

Table of Special Tools

EYE BOLT

A: EYE BOLT JIS B 1168 M10
B: WELD
C: BUSHING PT 3/8

1/4

NAME, DIMENSIONS

REMOVING JIG (A)

A: DIVIDED INTO 2 EQUAL PARTS

TIGHTENING JIG (B)

A: WELD

REMOVING JIG (C)

NAME, DIMENSIONS

PRESSURE FITTING JIG (D)

INSTALLATION JIG (E)

A: FINE CHAMFERING

INSTALLATION JIG (F)

A: R0.3 OR LESS

PRESSURE FITTING JIG (G)

Unit: mm

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TB125, 135, 145

PRESSURE FITTING JIG (H)

NAME, DIMENSIONS

PRESSURE FITTING JIG ( I )

PRESSURE FITTING JIG (J)

NAME, DIMENSIONS

INSTALLATION JIG (K)

PRESSURE FITTING JIG (L)

Unit: mm

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TB125, 135, 145

General Cautions

• Carry out disassembly and assembly operations in

a clean place and provide clean containers to place
the disassembled parts in.

• Before disassembly, clean around the ports and

remove the paint from each joint using a wire
brush.

• Wash the disassembled parts and dry them with

compressed air. Do not use a rag, as this could
cause clogging of dirt.

• Make match marks on each part so that they will be

assembled in the same positions when reassembled.

• Replace all seals with new ones each time the unit

is disassembled, coating them lightly with grease.

• Check each part to make sure there is no abnormal

wear or seizing and use sandpaper, etc. to remove
any burrs, sharp edges, etc.

Disassembly

1. Take out the cap screws and remove the plate.

2. Take out the plug (2) and remove the plug (3).

3. Remove the spring and spring seat.

E5D529

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HYDRAULIC UNITS

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TB125, 135, 145

4. Remove the spool assembly.

• Remove the spool assembly while turning it

gently.

• Be careful not to scratch or bruise the outside

surface.

5. Disassemble the spool assembly.

• Do not disassemble the spool assembly unless

it is absolutely necessary.
a. Take out the plug (4).

• Insert a ø5

30 mm pin (5) in the ø6

through hole in the spool, then fasten the
pin (5) by both ends in a vise and fasten
the spool assembly.

b. Remove the spring (6) and check valve (7).

• Be sure to keep the parts of the spool (8)

assembly so that the left-right combina-
tion of the check valve (7) with respect to
the spool (8) is kept the same when they
are assembled.

6. Remove the plug, then remove the spring and

spool.
• Do not scratch or bruise the outside surface of

the spool.

E5D530

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HYDRAULIC UNITS

TRAVEL MOTOR

TB125, 135, 145

7. Take out the cap screws.

8. Remove the valve body.

• Be careful not to let cylinder block come out.
• If it is difficult to remove, tap on it gently in the

removal direction using a plastic hammer or
pry it gently with a screw driver.

9. Remove the pin (11), valve plate (9), O-ring (53)

and spring (54).

10. Remove the brake piston (55).

• Blow compressed air into the parking brake

release port of the flange holder and remove
the brake piston.

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TB125, 135, 145

11. Remove the cylinder block assembly (12).

12. Disassemble the cylinder block assembly (12).

a. Remove the pin (13), guide (14), shoe holder

(15), piston assembly (16) and disc (56).
• Be careful not to scratch the sliding surfaces

of the cylinder block.

b. Remove the snap ring (17).
c. Remove the retainer (18), spring (19) and

retainer (20) from the cylinder block.
• Do not scratch the sliding surfaces of the

cylinder block.

13. Remove the swash plate (21), ball (22), piston

assembly (23) and spring (24) from the flange
holder.

14. Remove the cover (25).

a. Take out the plug, then set eye bolts (26) in the

threaded holes, pass a round bar through the
eye bolts and turn the cover (25) until the wire
(27) can be seen.

b. While pulling on the end of the wire (27) with

pliers, turn the cover (25) and pull the wire (27)
out.

c. Remove the cover (25) by hooking a hook in

the eye bolt (26) or using the round bar.

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HYDRAULIC UNITS

TRAVEL MOTOR

TB125, 135, 145

15. Remove the carrier assembly (28) and gear S1

(29).

16. Disassemble the carrier assembly (28).

a. Remove the thrust plate (30), then remove the

gear S2 (31).

b. Remove gear B2 (32) and inner race, needle

(33).

17. Remove the screw, then remove the thrust plate

(34).

18. Remove gear B1 (35), the needle (36), inner race

(37) and thrust washer (52).
• Do not scratch the gear tooth surfaces or the

rotating surface of the inner race (37).

19. Remove the plug.

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TB125, 135, 145

20. Take out the balls.

a. After degreasing with paint thinner, white gaso-

line or similar cleaning oil, blow with air to
remove the balls.
• If the balls are difficult to remove, tap on the

outside of the housing with a hammer.

b. Insert a piece of piano wire through the bolt

hole to make sure that all the balls have been
removed.

21. Disassemble the flange holder and housing.

a. Insert a metal plate or removing jig (A) be-

tween the flange holder and housing.

b. Tighten with 3 cap screws (M14

2.0) which

are spaced equally apart.

22. Take out the plug.

23. Remove the ring nut (38).

• Use a tightening jig (B).

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TB125, 135, 145

24. Remove the angular bearing (40) and remove the

floating seal (39).
• Place one end of a round bar against the steel

groove and tap the other end of the bar with a
hammer to remove the angular bearing (40).

25. Remove the floating seal.

26. Remove the shaft, then remove the oil seal.

• Bring a round bar in contact with the round

hole of the shaft and tap lightly with a hammer.

• Use a (–) screw driver to remove the oil seal.

27. Remove the bearing (41) from the shaft (42).

• Use removing jig (C).

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TB125, 135, 145

Assembly

1. Install the floating seal (43) in the flange holder

(44).
a. Insert the floating seal (43) temporarily using

installation jig (E).

b. Install it using installation jig (F).

2. Install the angular bearing.

• Use pressure fitting jig (D).

3. Install the other floating seal (39) on the housing.

a. Insert the floating seal temporarily using in-

stallation jig (E).

b. Install it using installation jig (F).

4. Install the flange holder.

• Use pressure fitting jig (G).

E5D531

E5D532

E5D533

E5D534

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TB125, 135, 145

5. Tighten the ring nut to secure the angular bearing.

• Use tightening jig (B).
• Ring nut tightening torque:

196

9.8 N·m (20

1 kgf·m)

6. Install the plug.

• The seal tape is unnecessary.
• Plug tightening torque:

14.7

4.9 N·m (1.5

0.5 kgf·m)

7. Stake the plug at 2 points with a punch.

8. Put in the balls (46).

E5D535

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TB125, 135, 145

9. Install the plug.

• Seal tape should be wound around the threads

of the plug.

• Plug tightening torque:

7.9

1.0 N·m (0.8

0.1 kgf·m)

10. Install the thrust washer, gear B1, the inner race

and the needle.

11. Install the thrust plate (34), then install the screw.

• Apply Loctite #262 to the screw.
• When applying Loctite, degrease all the sur-

faces thoroughly and use a hardening accelera-
tor.

• Screw tightening torque:

6.1

2.0 N·m (0.62

0.20 kgf·m)

12. Install the snap ring on the gear S1, then install the

gears S1.

13. Install the carrier assembly.

a. Install the inner race (37), the needle (36) and

gear B2 (32) in the carrier (28).

b. Install the carrier in the housing.
c. Install the gear S2 (31).

E5D536

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HYDRAULIC UNITS

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TB125, 135, 145

d. Install the thrust plate (30).

14. Fit the O-ring (49) on the cover (25) and install it

on the housing.
• Align the U-groove in the plug’s hole position.

15. Install the wire (27).

a. Bend the wire (27) at a point approximately 8

mm from the front end, then insert it in the bolt
hole in the housing.

b. Turn the cover and wind the wire (27) around

it.
• Use the eye bolts and a round bar.

16. Install the plug.

• Wind seal tape around the threads of the plug.
• Plug tightening torque:

7.9

1.0 N·m (0.8

1.0 kgf·m)

17. Install the oil seal in the flange holder.

• Use pressure fitting jig (H).

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HYDRAULIC UNITS

TRAVEL MOTOR

TB125, 135, 145

18. Install the ball bearing (41) on the shaft (42).

• Use pressure fitting jig (I).

19. Install the shaft assembly in the flange.

• Use pressure fitting jig (J).

20. Put in the balls and install the spring, piston

assembly and swash plate (21).
• Apply hydraulic oil to the sliding surfaces of

the swash plate.

21. Assemble the cylinder block assembly.

a. Install the collar, spring and washer in the

cylinder block.

b. Install the snap ring.

• Use the installation jig (K).

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HYDRAULIC UNITS

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TB125, 135, 145

c. Install the pin (13) in the cylinder block.

• Apply grease to the pin.

d. Install the guide (14), shoe holder (15), piston

assembly and disc (56).
• Apply hydraulic oil to the hole in the cylin-

der block.

22. Install the cylinder block assembly.

a. Install the shaft spline in the guide.

b. Push the cylinder block (12) by hand, making

sure the spring is working.
• Apply hydraulic oil to the sliding surfaces

of the cylinder block.

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TB125, 135, 145

23. Fit the O-ring (57), (58) on the brake piston (55).

24. Install the brake piston on the flange holder.

25. Install the spring (54), O-ring (10) and pin (11) in

the flange holder.

26. Install the ball bearing in the valve body.

• Use pressure fitting jig (L).

27. Install the pin and stake it at 2 points.

Takeuchi compact excavator TB125, TB135, TB145 / diesel TNE / diesel Yanmar. Service Manual - page 28