Hyundai Excavator R210LC-7. Service and repair manual - page 31

8-57-12

Insert break piston assy into body(1) and
compress it with a jig and hammer.

Ο

14078SM229/229A

Assemble spring(20)(20EA) into break
piston(17).

Â

Spring 

Ý

20EA

Π

14078SM230/230A

20

14078SM231/231A/B

Assemble  the  sub  of  rear  cover  assy
sub

Assemble the sub of make up check
valve assy.
Assemble O-ring(30), back up ring(29)
into plug(28) with a O-ring assembling jig.

Â

Plug

Ý

1EA

Â

Back up ring

Ý

1EA

Â

O-ring

Ý

1EA

(

(

3)

Η

28

30

Jig

29

Assemble respectively make up check
valve assy spring(31), check(32),
plug(28) into rear cover(21) after then
screw it torque wrench.

Â

Make up check sub 

Ý

2set

Â

Spring 

Ý

2EA

Â

Check 

Ý

3EA

Θ

14078SM215/215A

28

31

32

8-57-13

Assemble respectively plug(47), back up
ring, O-ring, O-ring, spring, anti-rotating
valve assy(34) into rear cover(21). 
(Bilateral symmetry assembling)

Â

Anti-Inversion v/v assy

Ý

2set

Â

O-ring(P12)

Ý

2EA

Â

O-ring(P18)

Ý

2EA

Â

Back up ring(P18)

Ý

2EA

Ι

14078SM214/214A

Assemble relief valve assy(33) 2set into
rear cover(21) with a torque wrench.
(Bilateral symmetry assembling)

Κ

14078SM213/213A

Assemble plug(37), plug(40, 41) into rear
cover(21) with a L-wrench.
* Plug

Ý

3EA(PF1/4)

Λ

14078SM216/216A

37

33

After assembling needle bearing(22) into
rear cover(21), with a hammer assemble
pin(8, 23).
* Pin

Ý

1EA

* Pin

Ý

2EA

Μ

14078SM212

8-57-14

Spreading grease on valve plate(24),
assemble into rear cover(21).

Â

Valve plate

Ý

1EA

Ν

14078SM212/212A

24

Lift up rear cover assy on body(1) by a
crane and assemble it with a wrench
bolt(27).

Ξ

14078SM203/203A

Assemble level gauge(44) into body(1).

Ο

14078SM202/202A

Assemble time delay valve assy(35) into
rear cover(21) with a wrench bolt(36).

Π

14078SM01/201A

44

35

8-57-15

14078SM232

Air pressing test
Be sure of leakage, after press air into
assembled motor

(4)

14078SM233/233A

Leakage check
After cleaning motor by color check No.1,
paint No.3 and be sure of leakage.

(5)

220078SM14

Mount test bench
Mounting motor test bench, test the
availability of each part.

(6)

8 - 58

3. REMOVAL AND INSTALL OF REDUCTION GEAR

REMOVAL

Remove the swing motor assembly.
For details, see 

removal of swing motor

assembly

.

Sling reduction gear assembly(1) and
remove mounting bolts(2).

Remove the reduction gear assembly. 

Reduction gear device weight : 180kg 

(396lb)

INSTALL

Carry out installation in the reverse order
to removal.

Tightening torque : 49.2~66.6kgf m

(356~481lbf ft)

2

1

(1)

(2)

(3)

1)

2)

(1)

13031GE18

21078DA05

8-59

4. DISASSEMBLY AND ASSEMBLY OF REDUCTION GEAR

STRUCTURE

1)

1

Casing

2

Drive shaft

3

Spacer

5

Roller bearing

6

Oil seal

7

Roller bearing

8

Thrust plate

9

Carrier 2

10

Stop ring

11

Ring gear

12

Knock pin

13

Pinion gear

14

Thrust washer

15

Planet gear 2

16

Pin & bushing

17

Spring pin

18

Sun gear 2

19

Carrier 1

20

Side plate 1

21

Pin 1

22

Needle cage

23

Bushing 2

24

Planet gear 1

25

Lock washer

26

Side plate 3

27

Sun gear 1

28

Stop ring

29

Plug

30

Plug

31

Socket bolt

34

Cover plate

35

Hexagon bolt

36

Lock plate

37

Hexagon bolt

38

Stop ring

39

Side plate 2

1

2

3

5

6

7

8

9

10

11

12

13

14

15 16

17

18 19

20

21

23

24

25

26

27

28

29

30

31

34

35

36

37

38

39

22

220072SF05A

8 - 60

DISASSEMBLY 

Spread off the 4 corners of lock washer
(25) with a tool.
Do not reuse lock washer(25).
Loosen the hexagon bolts(37) and then
remove lock washer(25) and lock plate
(36) from the pinion gear(13).
Remove pinion gear(13) and spacer(3)
from the drive shaft(2).
Remove cover plate(34) from the casing
(1) by loosening the hexagon socket bolts
(35).

Remove gauge bar(33) and gauge pipe
(32) from the swing motor casing.
Pour the gear oil out of reduction gear into
the clean bowl to check out the friction
decrease.

Loosen the socket bolts(31) to separate
swing motor from reduction gear.

33

32

25 37 36

13

3

35

34

1

2

31

(1)

2)

(2)

(3)

Tighten 3 M16 eye bolts to the ring gear
(11) and then lift the ring gear(11) out of
the casing(1).

11

1

(4)

21078SR001

21078SR002

21078SR003

21078SR004

8 - 61

Remove stop ring(28) and then sun gear1
(27).

27

28

19

(5)

Tighten two M10 eye bolts to carrier1(19)
and lift up and remove carrier1(19) as
subassembly.

19

19

38

39

22
24
20
17

21

26

(6)

Disassembling carrier1(19) assembly.

Remove stop ring(38).
Remove side plate2(39), planet gear1
(24), needle cage(22), side plate1(20)
and side plate3(26) from the carrier.
Using M8 solid drill, crush spring pin(17)
so that the pin1(21) can be removed by
hammering.
Remove side plate3(26) from carrier1(19).
Do not reuse spring pin(17).
Do not remove pin1(21), carrier1(19) and
spring pin(17) but in case of
replacement.
Put matching marks on the planet gear1
(24) and the pin1(21) for easy
reassembly.

(7)

21078SR005

21078SR006

21078SR007

8 - 62

Remove sun gear2(18) and thrust gear
(14).

18

14

(8)

Remove carrier2(9) assembly from casing
(1).

9

1

(9)

Remove thrust bearing(8) and stop ring
(10) from the drive shaft(2).

10

2

8

9

17

16

15

23

Disassembling carrier2(9) assembly

Using M8 solid drill, crush spring pin(17)
so that the pin2(16) can be removed.
Do not reuse spring pin(17).
Remove pin2(16), planet gear2(15) and
bush2(23) from the carrier2(9).
Put matching marks on the planet gear2
(15) and the pin2(16) for easy reassembly.
Do not disassemble pin2(16), carrier2(9)
and spring pin(17) but in case of
replacement.

(10)

(11)

21078SR008

21078SR009

21078SR010

21078SR011

8 - 63

Remove drive shaft(2) with roller
bearing(7) and oil seal(6) assembled.
Remove knock pin(12) from the casing(1).

1

6

7

2

12

(12)

Remove roller bearing(7) and oil seal(6)
from the drive shaft(2).
Do not reuse oil seal(6) once removed.

2

6

7

(13)

Using the bearing disassembly tool,
remove roller bearing(5).

5

1

(14)

Remove plugs(29, 30) from the casing(1).

1

29

30

30

(15)

21078SR012

21078SR013

21078SR014

21078SR015

8 - 64

ASSEMBLY 

Assemble roller bearing(5) inside the
casing(1).

Assemble the drive shaft(2) into the
casing(1) and then install oil seal(6) and
roller bearing(7).

1

2

6

7

5

1

(1)

3)

(2)

Install stop ring(10) and thrust bearing(8)
on top of drive shaft(2).

10

2

8

(3)

9

17

16

15

23

Assembling carrier2(9) assembly.

Install thrust gear(14) inside the carrier2
(9).
Install bush2(23) inside the planet gear2
(15) and then assemble them to the
carrier2(9).
Assemble the pin2(16) to the carrier2(9)
and then press the spring pin(17) by
hammering.
Punch 2 points of the spring pin(17) lip.
Take care not to mistake the matching
marks of each part.

(4)

21078SR016

21078SR017

21078SR018

21078SR019

8 - 65

Assemble carrier2(9) assembly correctly
to the drive shaft(2).

9

1

(5)

Assemble sun gear2(18) and thrust gear
(14) to the center of the carrier2(9)
assembly.

18

14

9

(6)

19

38

39

22
24
20
17

21

26

Assembling carrier1(19) assembly.

Assemble the pin1(21) to the carrier1(19)
and then press the spring pin(17) by
hammering.
Punch 2 points of the spring pin's(17) lip.
Install side plate3(26) onto the center of
carrier1(19).
Install needle cage(22) into the planet
gear1(24).
Assemble side plate(20), planet gear1
(24), side plate3(39) and then stop ring
(38) to the pin1(21).
Take care not to mistake the matching
marks of each part.

(7)

21078SR020

21078SR021

21078SR022

8 - 66

Install sun gear1(27) onto the side plate3
(26).

27

19

26

(8)

Assemble carrier1(19) assembly onto the
carrier2 assembly.

19

(9)

Apply loctite to the tapped holes of casing
(1).

Tighten 3 M16 eye bolts to the ring
gear(11) and lift up and then assemble it
onto the casing(1).
Don't fail to coincide the knock pin(12)
holes.

11

1

(10)

(11)

Hammer 4 knock pins(12) around the ring
gear(11).

Assemble stop ring(28) to the drive shaft
of the swing motor.

11

1

12

28

(12)

(13)

21078SR023

21078SR024

21078SR025

21078SR026

8 - 67

31

Apply loctite to the tapped holes of the
ring gear(11) and then mount swing motor
onto the ring gear(11).
Don't fail to coincide the gauge bar(33)
hole.

Tighten socket bolts(31) around the swing
motor assembly.

Tightening torque : 24kgf m(173lbf ft)

29
30

30

1

33
32

(14)

(15)

Assemble plugs(29, 30), gauge bar(33)
and gauge pipe(32).

(16)

Turn the swing motor assembly upside
down and assemble cover plate(34) by
tightening the hexagon socket bolts(35).
Install spacer(3) and pinion gear(13) to
the drive shaft(2).
Assemble lock plate(36) on the pinion
gear(13).
Assemble 2 lock washers(25) on the lock
plate(36) with their 2 hole coincided
individually to the tapped holes of drive
shaft(2).
Tighten hexagon socket bolts(37) to the
drive shaft(2) and then fold all the lock
washer(25) corners over the hexagon
bolts(37).

Tightening torque : 24kgf m(173lbf ft)

Inject oil into the reduction gear.

25 37 36

13

3

35

34

2

(17)

(18)

21078SR027

21078SR028

21078SR029

8-57-1

1. REMOVAL AND INSTALL OF MOTOR

REMOVAL 

Lower the work equipment to the ground
and stop the engine.

Operate the control levers and pedals
several times to release the remaining
pressure in the hydraulic piping.

Loosen the breather slowly to release the
pressure inside the hydraulic tank.
Escaping  fluid  under  pressure  can
penetrate  the  skin  causing  serious
injury.
When pipes and hoses are disconnected,
the oil inside the piping will flow out, so
catch it in oil pan.

Disconnect hose assembly(2).

Disconnect pilot line hoses(3, 4, 5, 6, 7).

Sling the swing motor assembly(1) and
remove the swing motor mounting bolts
(8).

·

Motor device weight : 230kg(507lb)

Remove the swing motor assembly.
When removing the swing motor
assembly, check  that  all the  piping have
been disconnected.

I

I

NSTALL

Carry out installation in the reverse order
to removal.

Bleed the air from the swing motor.

Remove the air vent plug.
Pour in hydraulic oil until it overflows from
the port.
Tighten plug lightly.
Start the engine, run at low idling and
check oil come out from plug.
Tighten plug fully.

Confirm the hydraulic oil level and check
the hydraulic oil leak or not.

1)

(1)

(2)

(3)

※

(4)

(5)

(6)

(7)

※

2

2

)

(1)

(2)

①
②

③
④

⑤

(3)

2

1

SH

7

PG

3

5

6

4

8

Mu

Dr

SGr

13031GE18

21078DA03

21078DA04

B. SWING DEVICE(RMF151, #1938 AND UP)

8-68

A. TRAVEL DEVICE(GM35VL, up to #2078)

1.  REMOVAL AND INSTALL 

REMOVAL

Swing the work equipment 90

。

and lower it

completely to the ground.

Operate the control levers and pedals
several times to release the remaining
pressure in the hydraulic piping.

Loosen the breather slowly to release the
pressure inside the hydraulic tank.
Escaping fluid under pressure can
penetrate the skin causing serious injury.
When pipes and hoses are disconnected,
the oil inside the piping will flow out, so
catch it in oil pan.

Remove the track shoe assembly.
For details, see r

r

emoval  of  track  shoe

assembly.

Remove the cover.

Remove the hose.
Fit blind plugs to the disconnected hoses.

Remove the bolts and the sprocket.

Sling travel device assembly(1).

Remove the mounting bolts(2), then
remove the travel device assembly.

·

Weight : 305kg(670lb)

INSTALL

Carry out installation in the reverse order
to removal.

Bleed the air from the travel motor.

Remove the air vent plug.
Pour in hydraulic oil until it overflows from
the port.
Tighten plug lightly.
Start the engine, run at low idling, and
check oil come out from plug.
Tighten plug fully.

Confirm the hydraulic oil level and check
the hydraulic oil leak or not.

GROUP  6  TRAVEL DEVICE

B

Dr

A

P

2

1

1)

2)

(1)

(2)

(3)

※

(4)

(5)

(6)

※

(7)

(8)

(9)

(1)

(2)

①
②

③
④

⑤

(3)

13031GE18

21078DA47