Hyundai Excavator R210LC-7. Service and repair manual - page 30

8-53

Cylinder assembly
Hold end of cylinder assembly(24) with
hands and assemble cylinder assembly to
housing(25).   Be careful to prevent
damage of seal by spline of shaft.
When assemble cylinder assembly, spline
shaft of cylinder is protruded from end of
housing, therefore put pads with length
30~50mm under bottom of housing.

Assemble plate(9) and lining plate(8).
Lubricate specified hydraulic oil on each
side.

Insert O-rings(10,12) into housing(25) and
piston(11).
Lubricate O-ring with grease.

Assemble outer race of taper roller
bearing(3) to motor housing(25).

(4)

(5)

ö

(6)

ö

(7)

ö

25038SM05(3)

(210-7)  SM32

25038SM05(1)

25038SM06(1)

8-54

Spring(13, brake unit)
Assemble spring(13) to piston(11) of
brake unit.
Insert spring(13) into original position.

Assemble bushing(20) with teflon ring(19)
and coned disk spring(18) to bushing hole
of cover(33).
Lubricate on both end surfaces of
bushing(20) and outer face of teflon
ring(19) with grease and assemble cover
to housing, and parts are adhered on
cover by grease viscosity which makes
assembling easy.

Brake piston
Lubricate specified hydraulic oil on outer
sliding face of piston(11) and assemble
brake piston to housing(25).
It is too tight to assemble piston(7)
because O-rings(10,12) are fitted,
therefore it is recommended to push
piston(11) horizontally by hands at once.

(8)

ö

(9)

ö

(10)

ö

Lubricate locating pin for antirotation of
balance plate(21) of cover(33) with grease
sufficiently and install locating pin to
housing.

(11)

25038SM06(2)

25038SM04(2)

(210-7)  SM38

25038SM07(1)

8-55

Assemble O-ring(12) to cover(33).
Lubricate O-ring with grease.

Apply three bond of white color to
distinguish oil leakage from remaining oil
in bolt hole(M16) of cover(33).

Balance plate
Assemble balance plate(21) to cover(33).
Be cautious of assembling direction.

(12)

ö

(14)

ö

(15)

Assemble inner race of needle bearing
(22) and snap ring(23) to cover(33).

(13)

25038SM07(2)

25038SM08(1)

(210-7)  SM41

25038SM08(2)

8-56

Make up valve
Assemble check(41) and spring(42) to
cover(33) and tighten cap(43) with 14mm
hexagonal socket bolt.

Â

Tightening torque : 14kgf

Â

m(101lbf

Â

ft)

B

B

ypass valve assembly

Assemble bypass valve assembly(29) to
cover(33) with 10mm hexagonal socket bolt.

Â

Tightening torque : 8kgf

Â

m(58lbf

Â

ft)

R

Relief assembly
Assemble relief valve assembly(34) to
cover(33) with 14mm hexagonal socket
bolt.

Â

Tightening torque : 8kgf

Â

m(58lbf

Â

ft)

Be cautious of assembling method.

C

Cover
Assemble cover(33) and balance plate
(21) to housing(25) lightly, holding them
up with hands.
When assembling, be careful not to
detach balance plate(21) and bushing
(20) from cover(33).
Fit matching marks on housing(25) and
cover(33) made before disassembling.

Tighten cover(33) and housing(25) with
16mm hexagonal socket bolt(36).

Â

Tightening torque : 29kgf

Â

m(210lbf

Â

ft)

(16)

ö

ö

(17)

(

(

18)

(19)

(20)

ö

25038SM03(1)

25038SM02(4)

25038SM09(1)

25038SM09(2)

8-57

Check of assembly
Load pilot pressure of 30kgf

cm

2

to brake

release port after opening inlet and outlet
port.
Check if output shaft is rotated smoothly
around torque of 4kgf

Â

m.

If not rotated, disassemble and check.

This completes assembly.

(21)

(210-7)  SM47

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).

Â

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)

ö

(4)

(5)

(6)

(7)

ö

2

2

)

(1)

(2)

Η
Θ

Ι
Κ

Λ

(3)

2

1

7

3

5

6

4

8

13031GE18

21078DA03

21078DA04

B. SWING DEVICE(RMF151, #1938 AND UP)

8-57-2

2. DISASSEMBLY AND ASSEMBLY OF SWING MOTOR

STRUCTURE

1)

K

4 1

26

9

1316

18 19 24 21 22 42

37

38

45

46

34

32

28

31

30

40

35

36

44

33

41

20

17

10

12

6

3

2

14

15

43

27

7

5

11

8 23

39

29

25

DETAIL :  K

220072SM02

1

Body

2

Oil seal

3

Roller bearing

4

Snap ring

5

Shaft

6

Bushing

7

Stop ring

8

Pin

9

Shoe plate

10

Cylinder block

11

Spring

12

Ball guide

13

Set plate

14

Piston assy

15

Friction plate

16

Plate

17

Brake piston

18

O-ring

19

O-ring

20

Spring

21

Rear cover

22

Needle bearing

23

Pin

24

Valve plate

25

O-ring

26

O-ring

27

Wrench bolt

28

Plug

29

Back up ring

30

O-ring

31

Spring

32

Check

33

Relief valve

34

Anti-inversion valve

35

Time delay valve

36

Wrench bolt

37

Plug

38

O-ring

39

Plug

40

Plug

41

Plug

42

Name plate

43

Rivet

44

Level gauge

45

Flange

46

O-ring

47

Plug

48

O-ring

49

O-ring

50

Back up ring

8-57-3

DISASSEMBLING

Disassemble  the  sub  of  a  TURNING
AXIS

Unloosing wrench bolt and disassemble
time delay valve assy(35) from rear
cover(21)

2)

(1)

Η

Disassemble level gauge(44) from body
(1).

Θ

14078SM201/201A

14078SM202/202A

Hang rear cover(21) on hoist, unloose
wrench bolt(27) and disassemble from
body(1).

Ι

14078SM203/203A

8-57-4

Using a jig, disassemble break piston(17)
from body(1).

Κ

14078SM204/204A

Disassemble respectively cylinder block
assy, fricktion plate(15), plate(16) from
body(1).

Λ

14078SM205/205A/B

14078SM206/205B

Disassemble cylinder block assy sub

Disassemble pistion assy(14), set plate
(13) from cylinder block assy.

(2)

Η

Disassemble ball guide(12) from cylinder
block(10).

Θ

14078SM207/207A

8-57-5

Disassemble spring(11) from cylinder
block(10).

Ι

14078SM208/208A

Disassemble shoe plate(9) from body(1).

Κ

14078SM209/209A

Using a plier jig, disassemble snap ring
(4) from shaft(5).

Λ

14078SM210/210A

Disassemble shaft assy from body(1).

Μ

14078SM211/211A

8-57-6

14078SM212/212A

Disassemble rear cover assy sub

Disassemble pin(8, 23), valve plate(24)
from rear cover(21).

(3)

Η

Using a torque wrench, disassemble
relief valve assy(33) 2 set from rear
cover(21).

Θ

14078SM213/213A

After disassembling plug with a L-wrench
from rear cover(21), disassemble
respectively back up ring, O-ring, O-ring,
spring, anti-inversion valve assy(34)

Ι

14078SM214/214A

Disassemble make up check valve assy
with a torque wrench from rear cover(21).

Κ

14078SM215/215A

8-57-7

Disassemble respectively plug(37, 40,
41), with a L-wrench from rear cover(21).

Λ

14078SM216/216A

8-57-8

ASSEMBLING

Assemble the sub of a turning axls

Put roller bearing(3), bushing(6) on
preheater and provide heat to inner
wheel(compressing temp : 290

Á

C for

2minutes)

Â

Roller bearing 

Ý

1EA

Â

Bushing

Ý

1EA

3

3

)

(1)

Η

14078SM217/217A/B

After assembling and compressing
preheated roller bearing(3), bushing(6)
into shaft(5).

Â

Stop ring 

Ý

1EA

Â

Shaft

Ý

1EA

Θ

14078SM218/218A/B

Put body(1) on a assembling jig, fix it with
bolts to prohibit moving.

Ι

14078SM219

6

3

5

7

8-57-9

Using a compressing tool and steel stick,
assemble oil seal(2) into body(1).

Â

Oil seal 

Ý

1EA

Κ

14078SM220/220A

Insert above shaft sub into body(1) and
assemble it with a steel stick.

Λ

14078SM211/211A 

Fix snap ring(4) to shaft with a plier jig.

Â

Snap ring 

Ý

1EA

Μ

14078SM210/210A 

Spread grease on shoe plate(9) and
assemble on the body.

Â

Shoe plate 

Ý

1EA

Ν

14078SM222/209A 

2

4

9

8-57-10

14078SM208/208A

Assemble  the  sub  of  cylinder  block
assy

Assemble spring(11) 9 set into cylinder
block(10).

Â

Spring 

Ý

9EA

(

(

2)

Η

Assemble ball guide(12) into cylinder.

Â

Ball guide 

Ý

1EA

Θ

14078SM207/207A

11

12

Assemble piston assy(14) 9 set into set
plate(13).

Â

Piston assy 

Ý

9EA

Â

SET plate 

Ý

1EA

Ι

14078SM223/223A

14

13

Assemble above item 

Θ

and 

Ι

.

Κ

14078SM224

8-57-11

Assemble cylinder block assy into body
(1).

Λ

14078SM225

Assemble O-ring(18) into body(1).

Â

O-ring 

Ý

1EA

Μ

14078SM226/226A

Assemble 3 set of plate(16), friction
plate(15) respectively into body.

Â

Plate 

Ý

3EA

Â

Friction plate 

Ý

3EA

Ν

14078SM227/205A

18

16

15

Assemble O-ring(19) into break piston
(17).

Â

O-ring 

Ý

2EA

Ξ

14078SM228/226A

19