Takeuchi Hydraulic excavator TB1140 (Serial No. 514400002~). Operator's Manual

DISASSEMBLY AND ASSEMBLY

UPPER FRAME

Removing the cab

1. Remove the battery ground cable from the battery

terminal.

2. Remove the operator's seat from the bracket.

3. Remove the cover R (11), cover C (12), and cover L

(13).

4. Remove the cover L (14) and cover R (15).

5. Disconnect the electrical wiring and air conditioner

ducts from the cab.

6. Disconnect the window washer hose from the cab.

7. Remove the seat bracket.

8. Take out the nuts and bolts holding the cab in place,

and suspend the cab and remove it.

Cab: 370 kg (815 lb)

Installing the cab

To install, follow the same procedures as for removal but

in the reverse order.

• Suspend the cab horizontally, and secure it in place

with nuts while it is suspended.

UPPER FRAME

4E0AS00

DISASSEMBLY AND ASSEMBLY

OPERATING DEVICE

Hydraulic pilot unit

Type A (ISO)

Pa7

Pa5

Pa4

Pa3

Pb5

Pb8

Pb3

Pb7

MP6

MT6

MP7

MT7

J3J1

J7J5

Pra3

Pra2

Prb3

Pa8

Pa9

Pra1

Prb2

Pa5

Pa4

Pc2

Prb1

Pc3

Pa6

Pb8

Pa3

Pa2

Pb9

Pc1

Pc3

Pa1

Pb6

Pb3

Pb1

Pb9

Pb5

BLT

Pb2

BLP

BL2

BL1

SS22

SS2P

SS2T

BST

SS21

SS1P

BSP

SS12

SS1T

SS11

BS1

TR4

BS2

TRT

MP2

TR3

MP3

MP4

MP5

TRP

TR1

MT2

MT3

MT4

TR2

MT5

OPERATING DEVICE

4F0AS00

DISASSEMBLY AND ASSEMBLY

OPERATING DEVICE

Table of connections

R1 ↔ J2

1. Pilot valve (Right)

R2 ↔ J4

2. Pilot valve (Left)

R3 ↔ J1

3. Pilot valve (Travel)

R4 ↔ J3

4. Pilot valve (Swing)

RP ↔ MP6

5. Pilot valve (Blade)

RT ↔ MT6

6. Solenoid valve (1st auxiliary line piping)

L1 ↔ J7

7. Solenoid valve (2nd auxiliary line piping)

L2 ↔ J5

8. Joint

L3 ↔ J8

9. Shockless valve

L4 ↔ J6

10. Control valve

LP ↔ MP7

11. Manifold

LT ↔ MT7

TR1 ↔ pa6

TR2 ↔ pb6

TR3 ↔ pa1

TR4 ↔ pb1

TRP ↔ MP2

TRT ↔ MT2

BS1 ↔ pra1

BS2 ↔ prb1

BSP ↔ TRP

BST ↔ TRT

BL1 ↔ prb2

BL2 ↔ pra2

BLP ↔ MP3

BLT ↔ MT3

SS11 ↔ pa2

SS12 ↔ pb2

SS1P ↔ MP5

SS1T ↔ MT5

SS21 ↔ pra3

SS22 ↔ prb3

SS2P ↔ MP4

SS2T ↔ MT4

J1 ↔ pa7

J2 ↔ pb7

J3 ↔ pa4

BSA ↔ pb8

J5 ↔ pa5

J6 ↔ pb5

J7 ↔ pa3

J8 ↔ pb3

pa4 ↔ pa8

pa5 ↔ pa9

pb5 ↔ pb9

pc1 ↔ pb9

Pc2 ↔ pb8

Pc3 ↔ pa3

Pc3 ↔ pb3

OPERATING DEVICE

4F0AS00

DISASSEMBLY AND ASSEMBLY

OPERATING DEVICE

Table of connections

R1 ↔ J2

1. Pilot valve (Right)

R2 ↔ SA

2. Pilot valve (Left)

R3 ↔ J1

3. Pilot valve (Travel)

R4 ↔ SB

4. Pilot valve (Swing)

RP ↔ MP6

5. Pilot valve (Blade)

RT ↔ MT6

6. Solenoid valve (1st auxiliary line piping)

L1 ↔ J7

7. Solenoid valve (2nd auxiliary line piping)

L2 ↔ SC

8. Joint

L3 ↔ J8

9. Shockless valve

L4 ↔ SD

10. Control valve

LP ↔ MP7

11. Manifold

LT ↔ MT7

12. Selector valve

TR1 ↔ pa6

TR2 ↔ pb6

TR3 ↔ pa1

TR4 ↔ pb1

TRP ↔ MP2

TRT ↔ MT2

BS1 ↔ pra1

BS2 ↔ prb1

BSP ↔ TRP

BST ↔ TRT

BL1 ↔ prb2

BL2 ↔ pra2

BLP ↔ MP3

BLT ↔ MT3

SS11 ↔ pa2

SS12 ↔ pb2

SS1P ↔ MP5

SS1T ↔ MT5

SS21 ↔ pra3

SS22 ↔ prb3

SS2P ↔ MP4

SS2T ↔ MT4

S1 ↔ J4

S2 ↔ J3

S3 ↔ J5

S4 ↔ J6

J1 ↔ pa7

J2 ↔ pb7

J3 ↔ pa4

BSA ↔ pb8

J5 ↔ pa5

J6 ↔ pb5

J7 ↔ pa3

J8 ↔ pb3

pa4 ↔ pa8

pa5 ↔ pa9

pb5 ↔ pb9

pc1 ↔ pb9

pc2 ↔ pb8

pc3 ↔ pa3

pc3 ↔ pb3

OPERATING DEVICE

4F0AS00

DISASSEMBLY AND ASSEMBLY

OPERATING DEVICE

Lever stand

Pilot valve (Left)

1 Adjusting the limit switch: When the limit switch is in

the ON position, the tip of the switch should be visi-

ble from the boot.

Apply rubber grease #9106 (for natural rubber).

1. Panel (Main)

9. Elbow rest

2. Panel (Side)

10. Plate

3. Base

11. Pilot valve (Left)

4. Lever

12. Gas spring

5. Plate

13. Limit switch

6. Plate

14. Snatch lock

7. Bracket

15. Stopper

8. Shaft

16. Spring

OPERATING DEVICE

4F0AS00

DISASSEMBLY AND ASSEMBLY

ATTACHMENTS

A: Apply NEVER-SEEZ lubricant to the pin insertion hole

and then insert the pin into the hole.

20. Boom

27. Pin

21. Boom cylinder R

28. Shim (Selected usage)

21-1. Boom cylinder L

29. Shim (Selected usage)

22. Arm cylinder

30. Shim (Selected usage)

23. Pin

31. O-ring

24. Pin

32. O-ring

25. Pin

33. Shim (Selected usage)

26. Pin

34. Castle nut

ATTACHMENTS

4G0AS00

DISASSEMBLY AND ASSEMBLY

ATTACHMENTS

Removing the hoe attachment

WARNING

• Be sure to release any residual pressure in the piping

before disconnecting the hydraulic hose.

• Do not attempt to insert any fingers into the hole when

adjusting the pin hole position.

Important:

• When tightening the lock bolt with a double nut, allow a

clearance of 0.5 mm to 1.0 mm (0.0197 in. to 0.0394

in.) between the nut and the lock collar.

• Adjust the clearance for the pin connector to a width of

between 0.2 mm to 0.5 mm (0.0079 in. to 0.0197 in.)

using a shim.

• Be sure to bleed the air from the cylinder before starting

operation for the first time after reassembling hydraulic

devices such as the hydraulic cylinder or hydraulic pip-

ing.

The numbers in parentheses, ( ), listed after the names of

parts throughout this document are used to refer to the

same parts as the numbers listed in the construction di-

agram and parts lists.

Removing the bucket

1. Orient the back of the bucket downward, and lower

the bucket all the way down to the ground.

2. Take out the bolts, and remove the pins.

3. Remove the bucket.

Bucket: 305 kg (670 lb)

Installing the bucket

To install, follow the same procedures as for removal but

in the reverse order.

Before beginning attachment of the bucket, place the O-

ring in the temporary placement position “A” in the outer

circumference of the bucket bushing, and move it to the

specified position “B” after completing attachment.

ATTACHMENTS

4G0AS00

DISASSEMBLY AND ASSEMBLY

ATTACHMENTS

Removing the link

• Completely retract the bucket cylinder, and lower the

tip of the arm to the ground.

1. Take out the pin (6), and remove the link arm (2).

a. Guide links R (3) and L (4)

Exercise caution as

they may drop

b. Cylinder (12)

Place on the skid

c. Link arm (2)

Suspend temporarily

2. Take out the pin (7), and remove the guide links R (3)

and L (4).

Installing the link

To install, follow the same procedures as for removal but

in the reverse order.

Removing the arm

1. Disconnect the hydraulic hoses from the bucket cyl-

inder (12).

Next, disconnect the hydraulic hoses from the auxil-

iary line ports.

2. Suspend the bucket cylinder (12) temporarily and

then pull out the pin (8) and remove the bucket cylin-

der.

Bucket cylinder: 94 kg (205 lb)

3. Place the skid under the arm cylinder (22), and re-

move the pin (9).

4. Take out the cotter pin, and remove the castle nut

(34).

5. Suspend the arm (1) temporarily and then pull out the

pin (24) and remove the arm.

Arm: 273 kg (600 lb)

Installing the lift arm

To install, follow the same procedures as for removal but

in the reverse order.

Important:

When securing the arm with the fixing pin (24) and castle

nut (34), make sure not to tighten the castle nut (34) too

much.

After tightening down the castle nut (34) with a hand, firm-

ly tighten it down until the tightening hole positions for the

fixing pin (24) and cotter pin for the castle nut (34) line up

properly.

ATTACHMENTS

4G0AS00

DISASSEMBLY AND ASSEMBLY

ATTACHMENTS

Removing the boom

Lower the tip of the boom all the way to the ground.

1. Disconnect the hydraulic hoses from the arm cylin-

der (22).

2. Suspend the arm cylinder (22) temporarily and then

pull out the pin (23) and remove the arm cylinder.

Arm cylinder: 147 kg (325 lb)

3. Remove the boom cylinders.

a. Disconnect the hydraulic pipings from the boom

cylinders R (21) and L (21-1).

b. Remove the covers and plates from the boom cyl-

inders R and L.

c. Suspend the boom cylinder R (21) temporarily.

d. Push in the pin (27), and disconnect the rod side

of the cylinder and lower the cylinder to the

ground.

• Push in the pin (27) only until the rod becomes

disconnected.

e. Suspend the boom cylinder L (21-1) temporarily

and then remove the pin (27) and lower the rod

side of the cylinder all the way to the ground.

f. Suspend the boom cylinder R (21) temporarily,

disconnect the head side from the head pin (26),

and raise the cylinder.

Boom cylinder: 110 kg (245 lb)

g. Suspend the boom cylinder L (21-1) temporarily,

take out the head pin (26), and raise the cylinder

as in the above step.

4. Disconnect the electrical wiring (38) to the boom light

from the wiring on the machine body side.

5. Disconnect the hydraulic hoses connected from the

machine body side from the pipes.

6. Suspend the boom (20) temporarily and then pull out

the pin (25) and remove the boom.

Boom: 669 kg (1475 lb)

Installing the boom

To install, follow the same procedures as for removal but

in the reverse order.

ATTACHMENTS

4G0AS00

DISASSEMBLY AND ASSEMBLY

ATTACHMENTS

Removing the swing bracket

1. Remove the cover and clamp from the boom bracket

(42).

2. Remove the plate, take out the pin (46), and discon-

nect the swing cylinder (47) from the swing bracket.

3. Suspend the boom bracket (42) temporarily and then

pull out the pins (43) and (44) and remove the swing

bracket.

• Be careful not to damage the hoses when working

with them.

Pin insertion bolt: 102 N·m (75.2 ft.-lb)

Boom bracket: 497 kg (1095 lb)

Installing the swing bracket

To install, follow the same procedures as for removal but

in the reverse order.

• During assembly, apply NEVER-SEEZ NS lubricant (an

anti-seizing lubricant) to the fixing pin holes on the

swing bracket and then insert the pins (46) and (45)

into the appropriate holes.

• Attach the washer (49) with the side with the grease

groove facing upward (toward the boom bracket side).

ATTACHMENTS

4G0AS00

DISASSEMBLY AND ASSEMBLY

ATTACHMENTS

Removing the blade

Lower the blade all the way down to the ground.

1. Disconnect the hydraulic hoses from the blade cylin-

ders R (51) and L (52).

2. Suspend the blade cylinder R (51) temporarily and

then take out the pins (53) and remove the blade cyl-

inder.

Next, remove the blade cylinder L in the same way as

for the blade cylinder R.

Blade cylinder R: 61 kg (135 lb)

3. Suspend the blade (50) temporarily and then take

out the pins (53) and remove the blade (50).

Blade: 567 kg (1250 lb)

Installing the blade

To install, follow the same procedures as for removal but

in the reverse order.

ATTACHMENTS

4G0AS00

DISASSEMBLY AND ASSEMBLY

ATTACHMENTS

Adjusting the clearance between the bucket and arm (Equipment)

WARNING

• Set all movable equipment against the ground or in the

lowermost position possible before performing mainte-

nance or repairs under the machine.

• When adjusting clearances, secure all relevant equip-

ment to prevent any accidental movement.

1. Lower the bucket all the way to the ground in a stable

position as shown in the above diagram.

2. Slew the upper structure slightly to the left, and lightly

push the arm toward the leftside of the bucket. (To-

ward the side without an adjuster.)

3. Set the safety lock lever in the locked position, and

stop the engine.

4. Loosen the three bolts (2) slightly using a wrench,

and remove the shim from the clearance C between

the blade (3) and the bucket. The shim is split into

two parts. Insert a screwdriver into the seam be-

tween the left and right shims and loosen the bolt

slightly to make it easier to remove the shims.

5. Move the O-ring (5) over, and measure the width of

the clearance (a).

6. To eliminate the clearance (a), push down on the

head of the bolt (2) with a finger. Pushing down on

the head of the bolt causes the clearance (b) to be-

come wider. Insert enough of the shims removed in

the above step into the clearance (b) as will go in

comfortably.

7. Insert the rest of the shims into the clearance (c) and

then tighten down the bolt to secure everything in

place.

Bolt: 83 N·m (61.5 ft.-lb)

This completes the clearance adjusting procedure.

Supplementary notes: The number of shims used for the

T clearances (b) and (c) is two sets of six or twelve total.

If the shim to be inserted into clearance (c) in 7. above is

omitted and forgotten, the end of the bolt (2) may jut past

the boss (6). If this occurs, the boss on the end of the arm

may be damaged or the bolt may break in two. If the end

surface of the boss (6) becomes worn and the width of

the groove for the O-ring exceeds 5 mm (0.2 in.), replace

the existing boss with a new one.

ATTACHMENTS

4G0AS00

DISASSEMBLY AND ASSEMBLY

HYDRAULIC TANK

ThreeBond #1324

1. Hydraulic tank

9. Check valve

16. Elbow

2. Suction pipe

10. Sight gauge

17. Elbow

3. Cover

11. O-ring

18. Cover

4. Suction filter

12. Plug

19. Bracket

5. Return filter

13. Adapter

20. Plate

6. Relief valve

14. Elbow

21. Check valve

7. Spring

15. Adapter

22. Spacer (Selected usage)

8. Air breather

HYDRAULIC TANK

4H0AS00

DISASSEMBLY AND ASSEMBLY

HYDRAULIC TANK

Removing the hydraulic tank

The numbers in parentheses ( ), listed after the names of

parts throughout this document are used to refer to the

same parts as the numbers listed in the construction di-

agram and parts lists.

1. Remove the covers from the perimeter around the

hydraulic tank.

“Removing the covers”

2. Drain the hydraulic oil from the hydraulic tank (1).

a. Push the button on the air breather (8) to release

the internal pressure in the hydraulic tank.

b. Loosen the drain plug (12), and drain out the oil.

• Tank level capacity: 95 L (25.1 US gal.)

3. Disconnect the low-pressure hoses from the hydrau-

lic tank.

4. Disconnect the high-pressure hoses from the hy-

draulic tank.

• Attach an identification tag on each hoses to avoid

mixing them up during reassembly.

5. Take out the bolts holding the hydraulic tank in place,

and suspend the hydraulic tank and remove it.

• During assembly, if any clearance exists between

the attachment surfaces of the machine body and

the hydraulic tank, insert a spacer (22) to get rid

of the clearance.

Bolt: ThreeBond #1324

Bolt: 102 N·m (75.2 ft.-lb)

Hydraulic tank: 94 kg (205 lb)

Installing the hydraulic tank

For installation of the hydraulic tank, follow the same pro-

cedures as for removal but in the reverse order.

HYDRAULIC TANK

4H0AS00

DISASSEMBLY AND ASSEMBLY

HYDRAULIC TANK

Inspecting and refilling the oil in the hydraulic tank

WARNING

• Oil may spurt out if caps or filters are removed or pipes

are disconnected before the pressure in the hydraulic

system is released.

• Push the button on the air breather (8) to release the in-

ternal pressure in the hydraulic tank.

Inspection

The oil level changes with the oil temperature. Inspect

the oil while maintaining the machine at the attitude

shown in the figure.

Machine attitude for inspecting the hydraulic oil level

1. Start the engine, and run it at low speed.

2. Fully retract the arm cylinder and the bucket cylinder,

and then lower the bucket to the ground.

3. Stop the engine.

4. Inspect the oil level using the sight gauge (10).

When the oil temperature is about 20°C (68°F): The

level should be halfway between the upper limit (H)

and the lower limit (L). If it is below the lower limit (L),

replenish.

When the oil temperature is about 50 to 80°C (122 to

176°F): The level should be near the upper limit (H).

Refilling the oil

Important: Do not refill to above the (H) mark. Doing so

may cause damage to the hydraulic circuit or cause oil to

spurt out. If the oil level is accidentally filled to above the

(H) mark, stop the engine and allow the hydraulic oil to

cool down before draining off the excess oil from the drain

plug (12).

Important: Failure to pressurize the hydraulic tank may

cause the pump to suck in air, which will adversely affect

the hydraulic units.

1. Push the button on the air breather to release the in-

ternal pressure in the hydraulic tank, and remove the

tank.

2. Add oil to the tank up to the halfway point on the side

gauge (10).

Bleeding off the air

Important: After replacing the hydraulic oil, bleed the air

from the hydraulic circuits and hydraulic devices. Failure

to do so may damage the hydraulic devices.

HYDRAULIC TANK

4H0AS00

DISASSEMBLY AND ASSEMBLY

HYDRAULIC TANK

Emergency shut-off valve

1. Place a receptacle under hose (A) or hose (B) to

catch waste oil that is drained out.

2. Start the engine, and let it run at a low-idling speed.

3. Move the safety lock lever to the full-release position.

a. Boom

4. Secure the hose fitting (A) in place with a wrench to

keep it from moving and then slowly loosen the hose

nut (1).

5. Slowly move the boom downward little by little until

air bubbles no longer escape from the hose nut (1)

connector.

6. Secure the hose fitting (A) in place with a wrench to

keep it from moving and then tighten the hose nut (1).

: 50 N·m (36.9 ft.-lb)

b. Arm

7. Slowly loosen the hose (B).

8. Slowly pull the arm outward little by little until air bub-

bles no longer escape from the hose (B) connector.

9. Screw the hose (B) back on.

: 50 N·m (36.9 ft.-lb)

Slew motor and cylinder

1. Start the engine, and let it run at a low-idling speed

for 10 minutes.

2. With the engine left idling, extend and retract each

cylinder 4 or 5 times without letting any reach the

stroke end.

3. Slowly slew the machine to the left and right several

times.

4. Run the engine at high speed and then extend and

retract each cylinder 4 or 5 times without letting any

reach the stroke end.

5. Slew the machine to the left and right several times.

6. Return the engine speed to low idle and then extend

and retract each cylinder 4 or 5 times without letting

any reach the stroke end.

HYDRAULIC TANK

4H0AS00

DISASSEMBLY AND ASSEMBLY

HYDRAULIC PUMP (MAIN)

Construction

04. Gear pump

156. Bushing

314. Valve plate L

535. Stopper S

774. Oil seal

05. PTO unit

157. Spring

401. Cap screw

548. Pin

789. Backup ring

111. Shaft

211. Shoe plate

402. Cap screw

702. O-ring

792. Backup ring

113. Shaft

212. Swash plate

406. Cap screw

710. O-ring

806. Nut

116. First gear

214. Bushing

466. Plug

711. O-ring

808. Nut

123. Bearing

251. Support

467. Plug

717. O-ring

824. Ring

124. Needle bearing

255. Pin

468. Plug

723. O-ring

886. Spring pin

127. Spacer

261. Cover

490. Plug

724. O-ring

901. Screw

141. Cylinder block

271. Casing F

531. Pin

727. O-ring

953. Adjusting screw

151. Piston

272. Casing R

532. Servo piston

728. O-ring

954. Adjusting screw

152. Seal

312. Block

533. Plug

732. O-ring

983. Pin

153. Plate

313. Valve plate R

534. Stopper L

733. O-ring

HYDRAULIC PUMP (MAIN)

4I0AS00

DISASSEMBLY AND ASSEMBLY

HYDRAULIC PUMP (MAIN)

Disassembly and assembly

The numbers in parentheses, ( ), listed after the names of

parts throughout this document are used to refer to the

same parts as the numbers listed in the construction di-

agram and parts lists.

General precautions

•

Perform disassembly and assembly work in a clean

place. Provide clean containers to hold parts during

disassembly.

•

Clean around the ports before disassembly. Remove

paint around connectors with a wire brush.

•

Clean the disassembled parts with wash oil.

•

Put alignment marks on all parts to ensure that they are

reassembled in the same positions.

•

After each disassembly, replace all seals and apply a

thin layer of grease to each.

•

Check each part for abnormal wear or seizing. Re-

move any burrs with sandpaper.

•

Remove adhesive from screw holes that use adhesive

through the tap. Do not reuse mounting bolts or

screws.

•

Do not use cloth gloves during assembly. Fibers from

the gloves could fall off and clog valves, etc., which

could cause parts to become faulty.

•

During assembly, be sure to apply clean hydraulic oil

to all moving parts in and sliding parts that come into

contact with the hydraulic motor and valve parts be-

fore installing or attaching the part.

•

Plug all ports once assembly has been completed in

order to prevent dust and dirt from entering.

•

Do not attempt to adjust the adjusting screws at times

other than when necessary.

HYDRAULIC PUMP (MAIN)

4I0AS00

DISASSEMBLY AND ASSEMBLY

HYDRAULIC PUMP (MAIN)

5. Take out the cap screws, and disassemble the cas-

ings (271) and (272) and the valve block (274).

6. Remove the first gear (116) from the valve block

(274).

7. Remove the cylinder block (141), the piston (151),

the shoe (152), the plate (153), the bushing (156),

and the spring (157) from the casings (271) and

(272).

8. Take out the cap screws, and remove the cover

(261).

• Insert a flat-bladed screwdriver into the notched

groove on the cover and use it to pry open the

cover to remove.

• Be careful not to damage the oil seal (774) for the

cover.

HYDRAULIC PUMP (MAIN)

4I0AS00

DISASSEMBLY AND ASSEMBLY

HYDRAULIC PUMP (MAIN)

9. Lightly tap on the rear ends of the shafts (111) and

(113) to remove the shafts from the casings (271)

and (272).

10. Remove the shoe plate (211) and swash plate (212)

from the casings (271) and (272).

11. Remove the pin (255) from the support (251).

• Push it out using a piece of wire or other object.

• When pushing the wire into the hole, make sure

not to confuse the pin insertion hole with the oil

supply line for the support.

• If the O-ring (728) has hardened, making it diffi-

cult to remove the pin, lightly tap the O-ring with a

hammer or other tool to loosen it.

12. Remove the valve plates (313) and (314) from the

block (312).

HYDRAULIC PUMP (MAIN)

4I0AS00

DISASSEMBLY AND ASSEMBLY

HYDRAULIC PUMP (MAIN)

Assembly

1. Attach the support (251) to the casings (271) and

(272).

2. Adjust the position of the pin groove on the support

(251).

3. Insert the pin (255).

• If the O-ring has hardened, making it difficult to in-

sert the pin, lightly tap the O-ring with a hammer

or other tool to loosen it.

4. Attach the swash plate (212) and the shoe plate

(211) to the support (251).

a. Attach the shoe plate (211) to the swash plate

(212).

b. Attach the bushing of the swash plate to the pin

(531).

• Using your fingers on both hands, check to en-

sure that the swash plate slides smoothly.

• Take care not to damage the sliding surfaces of

the shoe plate.

• Apply grease to sliding surfaces of the swash

plate

(212), support

(251), and shoe plate

(211).

5. Insert the shafts (111) and (127) into the casings

(271) and (272).

HYDRAULIC PUMP (MAIN)

4I0AS00

DISASSEMBLY AND ASSEMBLY

HYDRAULIC PUMP (MAIN)

6. Attach the cover (261) to the casing (271).

• The cover can be attached as is without grease

applied as there is grease on the oil seal (774) in-

side the cover.

• Take care not to damage the inner oil seal when

attaching the cover.

Cap screw: 21 N·m

7. Insert the piston (151), shoe (152), plate (153), bush-

ing (156), and spring (157) into the cylinder block

(141). (Cylinder block assembly.)

8. Slide the cylinder block assembly and guide (156)

onto the shaft (111), and insert the resultant assem-

bly into the casing.

9. Line up the valve plates (313) and (314) with the

spring pin (886) and insert them into the block (312).

• Take care not to confuse the intake and exhaust

directions on the valve plates.

HYDRAULIC PUMP (MAIN)

4I0AS00

Takeuchi Hydraulic excavator TB1140 (Serial No. 514400002~). Operator's Manual - page 5