Hyundai Excavator R450LC-7. Service and repair manual - page 2

SERVICE MACHINE SAFELY

Tie long hair behind your head. Do not wear a
necktie, scarf, loose clothing or necklace when
you work near machine tools or moving parts.
If these items were to get caught, severe injury
could result.

Remove rings and other jewelry to prevent
electrical shorts and entanglement in moving
parts.

STAY CLEAR OF MOVING PARTS

Entanglements in moving parts can cause
serious injury.

To prevent accidents, use care when working
around rotating parts.

AVOID HIGH PRESSURE FLUIDS

Escaping fluid under pressure can penetrate the
skin causing serious injury.

Avoid the hazard by relieving pressure before
disconnecting hydraulic or other lines. Tighten
all connections before applying pressure.

Search for leaks with a piece of cardboard.
Protect hands and body from high pressure
fluids.

If an accident occurs, see a doctor immediately.
Any fluid injected into the skin must be surgically
removed within a few hours or gangrene may
result.

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13031GE16

13031GE17

13031GE18

13031GE19

AVOID HEATING NEAR PRESSURIZED
FLUID LINES

Flammable spray can be generated by heating
near pressurized fluid lines, resulting in severe
burns to yourself and bystanders. Do not heat
by welding, soldering, or using a torch near
pressurized fluid lines or other flammable
materials.

Pressurized lines can be accidentally cut when
heat goes beyond the immediate flame area.
Install fire resisting guards to protect hoses or
other materials.

PREVENT BATTERY EXPLOSIONS

Keep sparks, lighted matches, and flame away
from the top of battery. Battery gas can
explode.

Never check battery charge by placing a metal
object across the posts. Use a volt-meter or
hydrometer.

Do not charge a frozen battery; It may explode.
Warm battery to 16

。

C (60

。

F ).

REVENT ACID BURNS

Sulfuric acid in battery electrolyte is poisonous.
It is strong enough to burn skin, eat holes in
clothing, and cause blindness if splashed into
eyes.

Avoid the hazard by:
1. Filling batteries in a well-ventilated area.
2. Wearing eye protection and rubber gloves.
3. Avoiding breathing fumes when electrolyte is added.
4. Avoiding spilling of dripping electrolyte.
5. Use proper jump start procedure.

If you spill acid on yourself:
1. Flush your skin with water.
2. Apply baking soda or lime to help neutralize the acid.
3. Flush your eyes with water for 10-15 minutes.

Get medical attention immediately.

If acid is swallowed:
1. Drink large amounts of water or milk.
2. Then drink milk of magnesia, beaten eggs, or

vegetable oil.

3. Get medical attention immediately.

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13031GE20

13031GE21

13031GE22

USE TOOLS PROPERLY

Use tools appropriate to the work. Makeshift
tools, parts, and procedures can create safety
hazards.

Use power tools only to loosen threaded tools
and fasteners.

For loosening and tightening hardware, use the
correct size tools. DO NOT use U.S.
measurement tools on metric fasteners. Avoid
bodily injury caused by slipping wrenches.

Use only recommended replacement parts.
(See Parts catalogue.)

DISPOSE OF FLUIDS PROPERLY

Improperly disposing of fluids can harm the
environment and ecology. Before draining any
fluids, find out the proper way to dispose of
waste from your local environmental agency.

Use proper containers when draining fluids. Do
not use food or beverage containers that may
mislead someone into drinking from them.

DO NOT pour oil into the ground, down a drain,
or into a stream, pond, or lake. Observe
relevant environmental protection regulations
when disposing of oil, fuel, coolant, brake fluid,
filters, batteries, and other harmful waste.

REPLACE SAFETY SIGNS

Replace missing or damaged safety signs. See
the machine operator's manual for correct safety
sign placement.

LIVE WITH SAFETY

Before returning machine to customer, make
sure machine is functioning properly, especially
the safety systems. Install all guards and
shields.

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13031GE25

13031GE24

13031GE23

1-9

GROUP 2 SPECIFICATIONS

1. MAJOR COMPONENT

Turning joint

Oil cooler

Radiator

Hydraulic oil tank

Main pump

Fuel tank

Tool box

Engine

Battery

Main control valve

Swing motor

Bucket

Tooth

Counterweight

Precleaner

Cab

Boom cylinder

Boom

Arm cylinder

Arm

Bucket cylinder

Side cutter

Connecting link

Connecting rod

Idler

Track roller

Carrier roller

Track

Sprocket

Travel motor

Muffler

45072SP00

1-21

7. UNDERCARRIAGE

TRACKS
X-leg type center frame is integrally welded with reinforced box-section track frames. The design
includes dry tracks, lubricated rollers, idlers, sprockets, hydraulic track adjusters with shock
absorbing springs and assembled track-type tractor shoes with triple grousers.

TYPES OF SHOES

NUMBER OF ROLLERS AND SHOES ON EACH SIDE

mm(in)

kg(lb)

kgf/cm

(psi)

mm(ft-in)

600(24)

44900(99000)

0.78(11.09)

3340(10' 11")

700(28)

45400(100100)

0.67( 9.53)

3440(11' 3")

750(30)

45700(100800)

0.63( 8.96)

3490(11' 5")

800(32)

46000(101400)

0.60( 8.53)

3540(11' 7")

900(36)

46500(102500)

0.54( 7.68)

3640(11' 11")

Triple grouser

Shapes

Shoe width

Operating weight

Ground pressure

Overall width

R450LC-7

Model

Carrier rollers

Track rollers

Track shoes

2EA

9EA

53EA

Item

Quantity

SELECTION OF TRACK SHOE
Suitable track shoes should be selected according to operating conditions.

Method of selecting shoes
Confirm the category from the list of applications in table 2, then use table 1 to select the shoe.
Wide shoes(Categories B and C) have limitations on applications. Before using wide shoes, check
the precautions, then investigate and study the operating conditions to confirm if these shoes are
suitable.
Select the narrowest shoe possible to meet the required flotation and ground pressure. Application
of wider shoes than recommendations will cause unexpected problem such as bending of shoes,
crack of link, breakage of pin, loosening of shoe bolts and the other various problems.

※

Table 1

Track shoe