Content .. 25 26 27 28 ..

Hyundai Excavator R210LC-7. Service and repair manual - page 27

8-5

2. TORQUE CHART

Use following table for unspecified torque.

BOLT AND NUT - Coarse thread

Bolt size

M 6

1.0

M 8

1.25

M10

1.5

M12

1.75

M14

2.0

M16

2.0

M18

2.5

M20

2.5

M22

2.5

M24

3.0

M30

3.5

M36

4.0

0.85 ~ 1.25

2.0 ~ 3.0

4.0 ~ 6.0

7.4 ~ 11.2

12.2 ~ 16.6

18.6 ~ 25.2

25.8 ~ 35.0

36.2 ~ 49.0

48.3 ~ 63.3

62.5 ~ 84.5

124 ~ 168

174 ~ 236

lbf ft

6.15 ~ 9.04

14.5 ~ 21.7

28.9 ~ 43.4

53.5 ~ 79.5

88.2 ~ 120

135 ~ 182

187 ~ 253

262 ~ 354

350 ~ 457

452 ~ 611

898 ~ 1214

1261 ~ 1703

kgf m

1.14 ~ 1.74

2.73 ~ 4.12

5.5 ~ 8.3

9.8 ~ 15.8

16.7 ~ 22.5

25.2 ~ 34.2

35.1 ~ 47.5

49.2 ~ 66.6

65.8 ~ 98.0

85.0 ~ 115

169 ~ 229

250 ~ 310

lbf ft

8.2 ~ 12.6

19.7 ~ 29.8

39.8 ~ 60

71 ~ 114

121 ~ 167

182 ~ 247

254 ~ 343

356 ~ 482

476 ~ 709

615 ~ 832

1223 ~ 1655

1808 ~ 2242

10T

BOLT AND NUT - Fine thread

Bolt size

M 8

1.0

M10

1.25

M12

1.25

M14

1.5

M16

1.5

M18

1.5

M20

1.5

M22

1.5

M24

2.0

M30

2.0

M36

3.0

kgf m

2.17 ~ 3.37

4.46 ~ 6.66

7.78 ~ 11.58

13.3 ~ 18.1

19.9 ~ 26.9

28.6 ~ 43.6

40.0 ~ 54.0

52.7 ~ 71.3

67.9 ~ 91.9

137 ~ 185

192 ~ 260

lbf ft

15.7 ~ 24.3

32.3 ~ 48.2

76.3 ~ 83.7

96.2 ~ 130

144 ~ 194

207 ~ 315

289 ~ 390

381 ~ 515

491 ~ 664

990 ~ 1338

1389 ~ 1879

kgf m

3.04 ~ 4.44

5.93 ~ 8.93

10.6 ~ 16.0

17.9 ~ 24.1

26.6 ~ 36.0

38.4 ~ 52.0

53.4 ~ 72.2

70.7 ~ 95.7

90.9 ~ 123

182 ~ 248

262 ~ 354

lbf ft

22.0 ~ 32.0

42.9 ~ 64.6

76.6 ~ 115

130 ~ 174

193 ~ 260

278 ~ 376

386 ~ 522

512 ~ 692

658 ~ 890

1314 ~ 1795

1893 ~ 2561

10T

kgf m

8-6

PIPE AND HOSE

Thread size

1/4"

3/8"

1/2"

3/4"

Width across flat mm

kgf m

lbf ft

21.7

28.9

36.2

86.8

101

FITTING

Thread size

1/4"

3/8"

1/2"

3/4"

Width across flat mm

kgf m

lbf ft

28.9

36.2

43.4

94.0

109

1. REMOVAL AND INSTALL

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.

Loosen the drain plug under the hydraulic
tank and drain the oil from the hydraulic
tank.

Hydraulic tank quantity : 180

Remove socket bolts(74) and disconnect
pipe(9).

Disconnect pilot line hoses(4, 5, 6, 7, 8, 9).

Remove socket bolts(72) and disconnect
pump suction tube(3).
When pump suction tube is disconnected,
the oil inside the piping will flow out, so
catch it in oil pan.

Sling the pump assembly and remove the
pump mounting bolts.

Weight : 120kg(265lb)

Pull out the pump assembly from housing.
When removing the pump assembly,
check that all the hoses have been
disconnected.

8-7

GROUP 3 PUMP DEVICE

9
74

Pm2

Pm1

Psv

Pi1

Pi2

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

13031GE18

21078DA01

21078DA02

8-8

INSTALL

Carry out installation in the reverse order
to removal.

Remove the suction strainer and clean it.

Replace return filter with new one.

Remove breather and clean it.

After adding oil to the hydraulic tank to the
specified level.

Bleed the air from the hydraulic pump.

Remove the air vent plug(2EA).
Tighten plug lightly.
Start the engine, run at low idling, and
check oil come out from plug.
Tighten plug.

Start the engine, run at low idling(3~5
minutes) to circulate the oil through the
system.

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

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

8-9

2. MAIN PUMP(1/2)

STRUCTURE

Gear pump

111

Drive shaft(F)

113

Drive shaft(R)

114

Spline coupling

123

Roller bearing

124

Needle bearing

127

Bearing spacer

141

Cylinder block

151

Piston

152

Shoe

153

Set plate

156

Bushing

157

Cylinder spring

158

Spacer

211

Shoe plate

212

Swash plate

214

Bushing

251

Support

261

Seal cover(F)

271

Pump casing

312

Valve block

313

Valve plate(R)

314

Valve plate(L)

401

Hexagon socket bolt

406

Hexagon socket bolt

466

VP Plug

468

VP Plug

490

Plug

531

Tilting pin

532

Servo piston

534

Stopper(L)

535

Stopper(S)

548

702

O-ring

710

O-ring

717

O-ring

724

O-ring

725

O-ring

728

O-ring

732

O-ring

774

Oil seal

789

Back up ring

792

Back up ring

806

Hexagon head nut

808

Hexagon head nut

824

Snap ring

885

886

Spring pin

901

Eye bolt

953

Set screw

954

Set screw

789, 732 532 214 548 531 724 792 534 901 808 954 717 151 152 211 113 04

535
806

953

886
717
406
261
774

111

824
127
710
123
251

212

702

490

153

156 158 157 468 313 124 312 114 466

885

314

141

271

401

728

725

(210-7) 8-9

8-10

MAIN PUMP(2/2)

541

Seat

543

Stopper 1

544

Stopper 2

545

Steel ball

079

Proportional reducing valve

544

543

545

541

079

VIEW A

(210-7) 8-10

8-11

TOOLS AND TIGHTENING TORQUE

Tools

The tools necessary to disassemble/reassemble the pump are shown in the follow list.

(1)

Hexagon socket

head bolt

Hexagon socket

head bolt

Henagon nut

VP plug

(PF thread)

M 5

M 6

M 8

M10

M20, M22

M12

M16

M18

M20

M12

M16

M18

M20

VP-1/4

VP-1/2

VP-3/4

BP-1/16

BP-1/8

BP-1/4

BP-3/8

BP-1

PO-1/4

PO-3/8

PO-1, 1 1/4, 1 1/2

M 8

M10

M12, M14

M16, M18

PT plug

(PT thread)

PO plug

(PF thread)

Hexagon socket

head setscrew

Name

Tool name & size

Part name

Allen wrench

Double ring spanner,

socket wrench, double(Single)

open end spanner

Adjustable angle wrench

Screw driver

Hammer

Pliers

Steel bar

Torque wrench

Medium size, 1 set

Minus type screw driver, Medium size, 2 sets

Plastic hammer, 1 set

For snap ring, TSR-160

Steel bar of key material approx. 10 8 200

Capable of tightening with the specified torques

8-12

Tightening torque

(2)

Part name

Hexagon socket head bolt

Material : SCM435)

PT Plug(Materal : S45C)

Wind a seal tape 1 1/2 to 2

turns round the plug

PF Plug(Materal : S45C)

M 5

M 6

M 8

M10

M12

M14

M16

M18

M20

PT1/16

PT 1/8

PT 1/4

PT 3/8

PT 1/2

PF 1/4

PF 1/2

PF 3/4

PF 1

PF 1 1/4

PF 1 1/2

0.7

1.2

3.0

5.8

10.0

16.0

24.0

34.0

44.0

0.7

1.05

1.75

3.5

5.0

3.0

10.0

15.0

19.0

27.0

28.0

5.1

8.7

21.7

42.0

72.3

116

174

246

318

5.1

7.59

12.7

25.3

36.2

21.7

72.3

109

137

195

203

0.16

0.20

0.24

0.31

0.39

0.47

0.55

0.67

0.16

0.20

0.24

0.31

0.39

0.24

0.39

0.55

0.67

Bolt size

Torque

Wrench size

kgf m

lbf ft

8-13

DISASSEMBLY

Select place suitable to disassembling.
Select clean place.
Spread rubber sheet, cloth or so on on
overhaul workbench top to prevent parts
from being damaged.

Remove dust, rust, etc, from pump
surfaces with cleaning oil or so on.

Remove drain port plug(468) and let oil
out of pump casing(Front and rear pump).

Place pump horizontally on workbench
with its regulator-fitting surface down and
separate pump casing(271) from valve
block(312).
Before bringing this surface down, spread
rubber sheet on workbench without fail to
prevent this surface from being damaged.

(1)

(2)

(3)

(6)

Loosen hexagon socket head bolts(401)
which tighten swash plate support(251),
pump casing(271) and valve block(312).
If gear pump and so on are fitted to rear
face of pump, remove them before
starting this work.

(5)

Remove hexagon socket head bolts(412,
413) and remove regulator.

(4)

(210-7) MP01

(210-7) MP02

8-14

Pull cylinder block(141) out of pump
casing(271) straightly over drive
shaft(111). Pull out also pistons(151),
set plate(153), spherical bush(156) and
cylinder springs(157) simultaneously.
Take care not to damage sliding surfaces
of cylinder, spherical bushing, shoes,
swash plate, etc.

(7)

Remove hexagon socket head bolts(406)
and then seal cover(F, 261).
Fit bolt into pulling out tapped hole of seal
cover(F), and cover can be removed
easily.
Since oil seal is fitted on seal cover(F),
take care not to damage it in removing
cover.

Remove hexagon socket head bolts(408)
and then seal cover(R, 262).
In case fitting a gear pump, first, remove
gear pump.

Tapping lightly fitting flange section of
swash plate support(251) on its pump
casing side, separate swash plate support
from pump casing.

(8)

(9)

Remove shoe plate(211)and swash
plate(212) from pump casing(271).

(11)

(10)

(210-7) MP03

(210-7) MP04

(210-7) MP05

(210-7) MP06

8-15

If necessary, remove stopper(L, 534),
stopper(S, 535), servo piston(532) and
tilting pin(531) from pump casing(271),
and needle bearing(124) and splined
coupling(114) from valve block(312).
In removing tilting pin, use a protector to
prevent pin head from being damaged.
Since loctite is applied to fitting areas of
tilting pin and servo piston, take care not
to damage servo piston.
Do not remove needle bearing as far as
possible, except when it is considered to
be out of its life span.
Do not loosen hexagon nuts of valve
block and swash plate support.
If loosened, flow setting will be changed.

(14)

Remove valve plates(313, 314) from valve
block(312).
These may be removed in work(6).

(13)

Tapping lightly shaft ends of drive shafts
(111, 113) with plastic hammer, take out
drive shafts from swash plate supports.

(12)

(210-7) MP07

(210-7) MP08

8-16

ASSEMBLY

For reassembling reverse the
disassembling procedures, paying
attention to the following items.

Do not fail to repair the parts damaged
during disassembling, and prepare
replacement parts in advance.
Clean each part fully with cleaning oil and
dry it with compressed air.
Do not fail to apply clean working oil to
sliding sections, bearings, etc. before
assembling them.
In principle, replace seal parts, such as
O-rings, oil seals, etc.
For fitting bolts, plug, etc., prepare a
torque wrench or so on, and tighten them
with torques shown in page 8-11, 12.
For the double-pump, take care not to
mix up parts of the front pump with those
of the rear pump.

(1)

Fit swash plate support(251) to pump
casing(271), tapping the former lightly
with a hammer.
After servo piston, tilting pin, stopper(L)
and stopper(S) are removed, fit them
soon to pump casing in advance for
reassembling.
In tightening servo piston and tilting pin,
use a protector to prevent tilting pin head
and feedback pin from being damaged.
In addition, apply loctite(Medium strength)
to their threaded sections.

(2)

(210-7) MP09

8-17

Place pump casing with its regulator fitting
surface down, fit tilting bush of swash
plate to tilting pin(531) and fit swash plate
(212) to swash plate support(251)
correctly.
Confirm with fingers of both hands that
swash plate can be removed smoothly.
Apply grease to sliding sections of swash
plate and swash plate support, and drive
shaft can be fitted easily.

(3)

Assemble piston cylinder subassembly

cylinder block(141), piston subassembly

(151, 152), set plate(153), spherical bush
(156), spacer(158) and cylinder spring
(157) .
Fit spline phases of retainer and cylinder.
Then, insert piston cylinder subassembly
into pump casing.

(6)

Assemble seal cover(F, 261) to pump
casing(271) and fix it with hexagon socket
head bolts(406).
Apply grease lightly to oil seal in seal
cover(F).
Assemble oil seal, taking full care not to
damage it.
For tandem type pump, fit rear cover(263)
and seal cover(262) similarly.

(5)

To swash plate support(251), fit drive
shaft(111) set with bearing(123), bearing
spacer(127) and snap ring(824).
Do not tap drive shaft with hammer or so
on.
Assemble them into support, tapping
outer race of bearing lightly with plastic
hammer.
Fit them fully, using steel bar or so on.

(4)

(210-7) MP10

(210-7) MP11

(210-7) MP12

(210-7) MP13

8-18

Fit valve plate(313) to valve block(312),
entering pin into pin hole.
Take care not to mistake suction / delivery
directions of valve plate.

(7)

Putting feedback pin of tilting pin into
feedback lever of regulator, fit regulator
and tighten hexagon socket head bolts
(412, 413).
Take care not to mistake regulator of front
pump for that of rear pump.

(9)

Fit valve block(312) to pump casing(271)
and tighten hexagon socket head bolts
(401).
At first assemble this at rear pump side,
and this work will be easy.
Take care not to mistake direction of valve
block.
Clockwise rotation(Viewed from input
shaft side) - Fit block with regulator up
and with delivery flange left, viewed from
front side.
Counter clockwise rotation(Viewed from
input shaft side) - Fit block with delivery
flange right, viewed from front side.

(8)

Fit drain port plug(468).
This is the end of reassembling procedures.

(10)

(210-7) MP14

(210-7) MP16

(210-7) MP17

8-19

3. REGULATOR

STRUCTURE(1/2)

SECTION B-B

VIEW C

KR3G-9C32

755

858

614

615

613

611

438

801

924

647

648

723

642

801

656

438

735

722

897

612

875

874

412

641

730

643

708

644

645

646

728

413

438

496

724

725

436

(210-7) 8-19

8-20

412

Hexagon socket screw

413

Hexagon socket screw

436

Hexagon socket screw

438

Hexagon socket screw

496

Plug

601

Casing

611

Feed back lever

612

Lever(1)

613

Lever(2)

614

Fulcrum plug

615

Adjust plug

621

Compensator rod

622

Piston case

623

Compensator rod

624

Spring seat(C)

625

Outer spring

626

Inner spring

627

Adjust stem(C)

628

Adjust screw(C)

629

Cover(C)

630

Nut

631

Sleeve

641

Pilot cover

642

Pilot cover(QMC)

643

Pilot piston

644

Spring seat(Q)

645

Adjust stem(Q)

646

Pilot spring

647

Stopper

648

Piston(QMC)

651

Sleeve

652

Spool

653

Spring seat

654

Return spring

655

Set spring

656

Block cover

708

O-ring

722

O-ring

724

O-ring

725

O-ring

728

O-ring

730

O-ring

732

O-ring

733

O-ring

734

O-ring

735

O-ring

755

O-ring

756

O-ring

763

O-ring

801

Nut

814

Snap ring

836

Snap ring

858

Snap ring

874

875

887

897

898

924

Set screw

925

Adjust screw(Q)

REGULATOR(2/2)

734

653

654

836

651 652

601

624

629

630

628

655

641

814

898

631

732

733

622

801

925

627

732

621

623

625

626

887

763

756

SECTION A-A

(210-7) 8-20

Content .. 25 26 27 28 ..