Hyundai HL757-7A User Manual

NEW 7A SERIES

HYUNDAI WHEEL LOADER Applied Tier III Engine

I Photo may include optional equipment.

NEW 7A SERIES

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New Generation - HL757-7A

Meet the new generation wheel loader with Hyundai.

The HL757-7A will give you the satisfaction in higher power,
lower fuel consumption, more comfort and lower emission .

Come and experience what Hyundai has created for you by bringing power and technology together.

HL757-7A_new_en 23-08-2007 09:23 Pagina 2

2

Hardworking

Hyundai Loaders

I Photo may include optional equipment.

Engine

.

Tier III Low emission certified

.

Electronic Engine Control

.

Engine Protection & Selfdiagnosis
System

.

Max Power 187 HP

.

2 Operating Modes :
Maximum Power & Best Economy

Transmission

.

2 Automatic Selection Modes

.

2 Kick Down Function Modes

.

AEB Function

Axle

. Limited Slip Pitterential
. Self-Adjusting & Wheel Speed Brake
. Impeaved Oil Circuit & Lubrication

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3

I Photo may include optional equipment.

I Photo may include optional equipment.

New Generation, Innovative Solution in Earth Moving, the

HL757-7A

The Centralized Display & Switch Panel

The centralized digital display shows the status and conditions of your machine at a glance.
Easy-to-read gauges with an instrument panel provide constant, and accurate information.

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4

ECU TCU

MCU

Adjustable
steering column

Full automatic shift lever

FNR Switch on Joystick
Control Lever

A forward/neutral/reverse travel
switch can be installed on top of it
for operators convenience.

The operator can easily control the
temperature and air flow. The
defroster on the front windshield and
rear window makes it convenient for
winter working usage.

Power Outlet &
Cigarette Jack

Cup Holder & Console Box

Storage Box







Joystick Controls

Boom an bucket are operated by a
pilot-pressure controlled joystick.

(Option)

A single lever on the left side of the
steering column gives the operator
fast and easy control of speed and
direction. Push the lever forward to
drive forward, pull it back for
reverse. Travelling is automatically
changed from 1st stage to given
stage according to travel speed and
traction effort. The operator can
select two kinds of automatic
modes (1st<->4th, 2nd<->4th). This
exclusive feature contributes to a
step-up in productivity and
reduction of operator’s fatigue.

Engine control Unit (ECU), Trans­mission control Unit (TCU) and
Machine control Unit (MCU) realize
the optimal performance through the
mutual CAN communications.

The Air Conditioning and Heating System

Up-to-Date-technology CAN System

Ride control is available for smooth travelling. It significantly reduces
machine bouncing and absorbs the shocks in the machine, enhancing
productivity. This system reduces the fatigue of the driver as well as the
stress on the structures and components.

Ride control system (option)

Control Center

The fully new, deluxe operating space was engineered by using 3-D modelling to
optimize drivers comfort. The wide, tinted and laminated front windshield has no
frame cutting through to ensure excellent visibility.

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40

40

80 mm

80 mm

1

3 4

2

5

New Generation, Innovative Solution in Earth Moving, the

HL757-7A

The CUMMINS QSB6.7 electronic control
engine combines full-authority electronic
controls with reliable performance. The
combination of improved airflow and evenly
dispersed fuel results in increased power,
improved transient response and reduced
fuel consumption. Through the use of
advanced electronics, the QSB6.7 the engine
meets the emission standards EPA TierIII/EU
StageIII.

I Photo may include optional equipment.

I Photo may include optional equipment.

HL757-7A_new_en 23-08-2007 09:23 Pagina 6

CUMMINS

QSB6.7

6

A Well Rounded System

Maximize your business productivity with HL757-7A.
With our vast experience in the production of construction equipment,
Hyundai is able to meet our customers demands.

Left and right access door Bucket cylinder guard

This guard helps to prevent possible
damage while loading material.

High-rigidity frames

Front and rear frames are designed
to work in the toughest conditions
and provide high rigidity for the
power train and loader equipment.
The sturdy frames, together with the
reinforced front/rear frame linkage,
resist loading stress and shocks
while in operation.

2 Operating mode

EEccoonnoo MMooddee
Maximum fuel efficiency for
general loading

PPoowweerr MMooddee
Maximum power output for hard
digging or climb hill

Battery master switch

A master switch disconnects the battery power
to protect the electrical system from excessive
electrical drainage.

Sealed loader linkage

Fully protected fitting including dust seals and o­rings on the bucket linkage will extend lubrication
intervals remarkably.

Frame lock

The machine can be locked by a locking bar to
prevent movement during transportation.

Multi Function Transmission

The newly developed transmission control represents the beating heart of transmission. The hydraulically operated
gear shifting with proportional valves allows precise clutch operation. For each gear change, the control unit
performs a monitoring function to ensure that the specified shift curve is adhered to, and readjusts the shift
pressure applied to the clutches accordingly. This result in smooth gearshifts under load without traction
interrupts. It also prevents standstills, sudden load changes or torque peaks during operation such as steep hill
driving with full load. In addition, there is the option for the driver to make manual gearshifts.

Improved Axle

•

Limited Slip Defferential in standard eqipment allows easy driving on variable ground condition.

•

Self adjusting Brake which regulate the Disk clearance automatically can maintain optimum Brake performance.

•

Due to Improved internal Oil circuit, durabiliy of Axle is increased.

LL

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7

Accessible and Serviceable

New Generation, Innovative Solution in Earth Moving, the

HL757-7A

Accessible grease fittings

Grease fittings are highlighted and
centralized on the machine for fast
access when doing your service
checks.

Simple air filter
replacements

The air cleaner is easily replaceable
by turning the wing nut on the outer
shell counter-clockwise.

Open pin access

You can quicker remove or tighten
your front attachment pin
(chromated) with this open
connector system.

Remote type drain port

It is now easier to change your
engine oil, coolant and hydraulic oil
with the remote drain port located
near the rear axle of the machine.

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8

An ideal arrangement of components ensures easy access and convenience for maintenance.
A highly accessible engine compartment assures fast and efficient maintenance.

Hydraulic tank

The hydraulic tank is located behind the cab to facilitate accessibility of
hydraulic hoses and piping.

Oil sight gauge

A sight gauge is installed on the side
of the hydraulic tank for convenient
ground level check out.

Transmission oil port

The transmission oil change port is
openly accessible. It comes with an
anti-vandalism lock for machine
protection.

Centralised electric controllers &
Fuse Box

The electric controllers for this loader are
centralized together with the fuse box to improve
serviceability and facilitate inspections.

Cabin Air Fresh Filter

The internal pressure is maintained slightly higher
than that of outside to exclude dust from and
reduce noise level in the cabin.

Coolant Sight Gauge

A sight gauge is installed on top of the radiator
tank for convenient checks of the coolant level.

Easy Access to All Engine
Components

Up-to-date hydraulic remote
cooling fan

Here you find engine oil check and
main and pre-filters. The large
access engine-side-panels permit
easy and safe inspections. The fuel
and oil filters can be spun on and
off for quick replacements.

Minimum fuel consumption and
low noise is realized by using a
hydraulic cooling fan sensing
coolant temperature, intake air
temperature, transmission oil
temperature and hydraulic oil
temperature. Reversible cooling
fan installed.

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9

Specification

Engine

Maker/Model

Type

Gross power

Net power

Maximum power

Maximum torque

No. of cylinders

CUMMINS QSB6.7

Bore x Stroke

107 mm (4.2”) x 124 mm (4.88”)

Displacement

6.7 litres (409 cu in)

Compression ratio

17.2 : 1

Air cleaner

Dry, dual elements

Alternator

24V, 70 Amp

Battery

2 x 12V, 130 Ah.

Starting motor

24V, 3.7 kW

Transmission

Axles

Hydraulic System

Torque converter type

Stall torque ratio

3-elements, single-stage

single-phase

2.527 :1

Drive system

Four-wheel drive system

Type

Open-centred, tandem circuit system.

Pilot-operated controls. Closed with

pressure and vacuum relief.

Bucket Controls

Type

Lift Circuit

Tilt Circuit

Cylinder

HL757-7A

HL757TM-7A

HL757-7A / HL757XTD-7A

HL757TM-7A

Cycle Time

Pilot operated lift and tilt circuit,

single-lever (joystick) control standard.

The valve has four functions:

raise, hold, lower and float.

An adjustment for automatic kick-out

from horizontal to full lift is installed.

The valve has three functions:

tilt back, hold and dump. An adjustment

for automatic bucket position to the

desired load angle is installed.

Type : Double acting

No. of cylinders-bore x stroke;
Lift 2-140 mm (5.5") x 750 mm (29.5")
Tilt 1-160 mm (6.3") x 475 mm (18.7")

2-120 mm (4.7") x 755 mm (29.7")

Raise (with load)

Dump

Lower (empty)

Total sec

6.1 sec

1.3 sec

3.1 sec

10.5 sec

6.1 sec

1.7 sec

3.1 sec

10.9 sec

Pump

Helical gear type, 230 litres/min

(58.1 gal/min)@governed rpm

Control Valve

Two function valve with single or two
lever controls: Optional third-function

valve with auxiliary lever.

Relief Valve Setting

Relief Valve Setting

20,5 MPa (2,990 psi)

2,9 MPa (427 psi)

Pilot System Type

Pilot oil pressure is generated by the pilot

oil supply unit.

Mount

Rigid front axle and oscillating rear axle

Rear axle oscillation

+/- 13° (total 26°)

Hub reduction

Planetary reduction at wheel end

Differential

Differential, limited slip (front/rear)

Reduction ratio

23.680

Travel speed

Forward

km/h (mph)

6.9 (4.3)

11.4 (7.1)

22.6 (14.0)

Reverse

35.6 (22.1)

7.2 (4.5)

12.0 (7.5)

23.7 (14.7)

4-cycle, turbocharged, charge air-cooled

direct injection, electronic controlled

diesel engine

129 kW (173 HP) at 2,100 rpm

122 kW (164 HP) at 2,100 rpm

133 kW (187 HP) at 1,800 rpm

830 Nm (600 lbf.ft) at 1,400 rpm

6

Net power output of standard engine as installed in this vehicle (per SAE J1349) complete with fan, air cleaner, alternator, water pump, lubricating oil pump and fuel pump.
No derating for continuous operating required up to 3,048 m (10,000 ft). This engine meets the EPA(Tier III) / EU(Stage III-A) Emission regulation.

Full automatic power shift, countershaft type with soft-shift in range and direction.
Properly matched torque converter to engine and transmission for excellent
working ability.

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10

Specification

Dimensions

Service Brakes

Brakes

Service Refill Capacities

Overview Tires

Steering System

Hydraulically actuated, wet disc

brakes actuate all 4 wheels

independent axle-by-axle system.

Self adjusting & wheel speed brake

Single pedal braking including clutch

cut off switch.

Type

Full hydraulic power steering

Pump

Helical gear type, 110 litres/min

(29.1 gal/min)@governed rpm

Relief Valve Setting

20,5 MPa (2,990 psi)

Type

Bore x Stroke

Double acting

70 mm (2.8”) x 436 mm (17.2”)

Steering Angle

Features

- Centre-point frame articulation.

- Load-sensing, pressure-compensated system.

- Steering-wheel operated metering pump controls flow to steering cylinders.

- Tilt and telescopic steering column.

40° (each direction)

Parking Brake

Spring-applied, hydraulically

released disc brake on

Transmission Output shaft.

Emergency Brake

When brake oil pressure drops,

indicator light alerts operator and

parking brake automatically applies.

Fuel tank

Description UNIT

Operating weight

kg (lb)

Bucket Capacity

Tipping load

Heaped

m3(yd3)

Struck

Description UNIT

Bucket Type

Description UNIT

G. Front overhang

H. Wheelbase

I. Ground clearance

J. Height over exhaust

K. Height over cab

M. Dump angle

Clearance circle

N. Overall width

mm (ft-in)

mm (ft-in)

mm (ft-in)

mm (ft-in)

mm (ft-i

n)

mm (ft-in)

mm (ft-

in)

C. Digging depth

E. Overall height (fully raised)

F. Bucket pivot max. height

General purpose bolt-on cutting edge

A. Dumping clearance at max.

height and 45° dump angle.

B. Reach

Full lift

7ft height

D. Overall length

on ground

at carry

mm (in)

mm (ft-in)

mm (ft-in)

mm (ft-in)

mm (ft-in)

mm (ft-in)

mm (ft-in)

mm (ft-in)

L. Roll-back angle

on ground

deg

at carry

deg

deg

m

3

(yd3)

Breakout force-bucket

kg (lb)

Straight

kg (lb)

Full turn

kg (lb)

295 liters (78 USgal)

Cooling system

35 liters (9.2 USgal)

Crankcase

16 liters (4.2 USgal)

Transmission

43 liters (11.4 USgal)

Front axle

29 liters (7.7 USgal)

Rear axle

24 liters (6.3 USgal)

Hydraulic tank

130 liters (34.4 USgal)

Hydraulic system

(including tank)

175 liters (46.3 USgal)

Type

Tubeless, loader design tires

Standard

Options include

Cylinder

HL757-7A_new_en 02-11-2007 15:30 Pagina 11

HL757-7A

13,800 (30,420)

2.7 (3.5)

2.3 (3.0)

12,720 (28,040)

11,020 (24,300)

9,510 (20,970)

HL757XTD-7A

14,300 (31,530)

2.7 (3.5)

2.3 (3.0)

12,560 (27,690)

9,670 (21,320)

8,340 (18,390)

HL757TM-7A

14,300 (31,530)

2.5 (3.3)

2.1 (2.8)

13,020 (28,700)

9,500 (20,940)

8,150 (17,970)

E

F

A

L

C

M

B

I

HG

D

J

K

20.5-25, 16 PR, L3

17.5-25, 12 PR, L3

20.5-25, 16 PR, L2

20.5 R25 XHA

20.5-25, 16 PR, L5

N

HL757-7A

2,860 (9’ 5”)

1,040 (3’ 5”)

1,590 (5’ 3”)

7,450 (24’ 7”)

7,390 (24’ 5”)

5,250 (17’ 3”)

3,910 (12’ 10”)

95 (3.7”)

HL757XTD-7A

3,720 (10’ 9”)

1,060 (3’ 6”)

1,950 (6’ 5”)

130 (5.1”)

7,880 (25’ 10”)

7,850 (25’ 9”)

5,650 (18’ 6”)

4,320 (14’ 2”)

2,900 (9’ 6”)

1,280 (4’ 2”)

1,790 (5’ 10”)

97 (3.8”)

7,670 (25’ 2”)

7,480 (24’ 6”)

5,330 (17’ 6”)

4,020 (13’ 2”)

A7-757LHA7-MT757LH

HL757XTD-7A

2,520 (8’ 3”)

3,030 (9’ 11”)

410 (1’ 4”)

3,130 (10’ 3”)

3,300 (10’ 10”)

12,350 (40’ 6”)

2,740 (9’)

2,930 (9’ 7”)

3,030 (9’ 11”)

3,130 (10’ 3”)

3,300 (10’ 10”)

41

46

47

12,720 (41’ 9”)

410 (1’ 4”)

41

48

47

2,740 (9’)

HL757TM-7A

2,670 (8’ 9”)

3,030 (9 11”)

410 (1’ 4”)

3,130 (10’ 3”)

3,300 (10’ 10”)

50

54

50

12,380 (40’ 7”)

2,740 (9’)

11

3.1
(4.1)

2.9
(3.8)

2.7
(3.5)

2.5
(3.3)

2.3
(3.0)

2.1
(2.7)

1.9
(2.5)

1400

2000 2500 3000 3500 4000

1600 1800 2000 24002200

HL757-7A

kg/m

3

lb/yd

3

HL757XTD-7A
HL757TM-7A

17.5-25 12PR L3

20.5-25 16

PR L2

20.5 R25 XHA

20.5-25 16

PR L5

-248 (-547)

-64 (-141)

+507 (+1118)

+596 (+1314)

-184 (-406)

-48 (-106)

+377 (+831)

+442 (+974)

-163 (-359)

-42 (-93)

+332 (+732)

+392 (+864)

Electrical system

Alternator, 70A
Alarms, audible and visual

.

air filter clogging

.

transmission error

.

alarm, back-up

.

alternator voltage

.

brake oil pressure

.

engine oil pressure

.

parking brake

.

hydraulic oil temperature

.

coolant temperature

.

service brake oil pressure

Batteries, maintenance-free

950 CCA, 12V, (2)

Gauges

.

engine coolant temperature

.

fuel level

.

hydraulic oil temperature

.

speedometer

.

transmission oil temperature

.

voltmeter

Horn, electric

Indicator lights

.

clutch cut-off

.

high beam

.

turn signal

.

work light

LCD Display

.

clock and fault code

.

operating hour counter

.

engine rpm

.

transmission gear range indicator

.

job time and distance

.

temperature
(coolant, hydraulic oil, t/m oil)

Lighting system

.

2 dome lights

.

2 stop and tail lights

.

4 turn signals

.

brake lights (counter weight)

.

license plate light

.

head light

2 on front tower

.

working lights
2 on front roof
2 on grill

Switches

.

buzzer stop

.

clutch cut-off

.

hazard

.

lgnition key, start/stop switch

.

main light

(illumination and head light)

.

parking

.

rear wiper & washer

.

work light

.

full automatic transmission

Starter, electric
Starting and charging system (24-volt)
Main disconnect switch

Cab

Air conditioner with heater

Cab, ROPS/FOPS
(sound suppressed and

pressurized) with :

.

cigar lighter & ashtray

.

coat hook

.

front/rear window defroster

.

intermittent wiper and washer,
front and rear

.

personal storage space:
console box
cool & hot box
holder, can and cup

.

rear view mirrors (2 inside)

.

rear view mirrors (2 outside)

.

seat belt

.

seat, adjustable suspension with

armrests

.

steering column, tilt and

telescopic

.

steering wheel with knob

.

sunvisor (front window)

.

tinted safety glass

.

two door cab, fixed glass

Magazine box
Pedals

.

one accelerator pedal

.

one brake pedal

Rubber floor mat
Wrist rest
Radio CD player

Engine

Antifreeze
Engine, Cummins QSB6.7

.

Low Emission Diesel, Tier-llI

Engine enclosure, lockable
Engine fuel priming pump
Fan guard
Fuel/water separator
Muffler, under hood with large

exhaust stack
Precleaner, engine air intake
Radiator
Starting aid (air intake heater)
Water sensor on fuel filter

Power Train

Brakes : Service, enclosed wet-disc
Differential, limited slip (front/rear)
Parking brake
Torque converter
Transmission, computer-controlled,

electronic soft shift, auto-shift and

quick-shift features included
Transmission oil cooler

Hydraulics

Boom lock safety valve
Boom kickout, automatic
Bucket positioner, automatic
Diagnostic pressure taps
Hydraulic oil cooler
Hydraulic system,

. 2 spool, single lever, pilot control

for boom and bucket actuation
FNR switch on joystick control lever
Steering, load-sensing
Remote cooling fan, hydraulically-

driven, temperature sensing type
Reversible cooling fan

Others

Articulation locking bar
Coolant level sight gauge
Counterweight
Door and cab locks, one key
Doors, service access (locking)
Drawbar with pin
Engine oil level dipstick gauge
Ergonomically located and slip
resistant, left & right

- handrails

- ladders

- platforms

- steps
Fenders (front/rear)
Guard, bucket cylinder rod
Hydraulic oil level sight gauge
License plate bracket
Lift and tie-down hooks
Loader linkage, sealed Z-Bar design
Steering stops, cushioned
Tires (20.5-25, 16PR, L3)
Transmission oil level dipstick gauge
Vandalism protection caplocks

24-volt to 12-volt DC converter
Air condition :

.

air condition

.

heater
Beacon light, rotating
Cutting edge, bolt-on type
Fire extinguisher
Fuel warmer
High lift arrangement with additional

counterweight, 280kg (617 lb)

Hourmeter
Hydraulic control, 2 lever
Hydraulic control, 3 lever
Hydraulic arrangement, 3-valve
Lighting, auxiliary, 4 on roof
Mud guard
Open Canopy (ROPS/FOPS)
Open Canopy (None-ROPS)
Operator suit

Ride control system
Emergency steering system

Seat

.

2” static seat belt & adjustable
mechanical suspension(vinyl)

.

3” static seat belt & adjustable
mechanical suspension

.

3” retractable seat belt &
adjustable air suspension

Tires :

.

17.5 - 25, 12PR, L3

.

20.5 - 25, 16PR, L2

.

20.5 R25 XHA *

.

20.5 - 25, 16PR, L5

Tool kit
Tooth, 1 piece, bolt-on type
Tooth, 2 pieces, bolt-on type

Guards

.

crankcase

.

transmission
Wheel chock
Window, sliding

(left and right side)

Standard and optional equipment may vary. Contact your Hyundai dealer for more information. The machine shown may vary according to International standards.
All US measurement rounded off to nearest pounds or inches.

Bucket Selection Guide

Standard Equipment

Optional Equipment

Supplemental Specifications

Description

Change in operating

weight

kg (lb)

Change in static

tipping load-straight

kg (lb)

Change in static
tipping load-40°

turn kg (lb)

Bucket Capacity, m

3

(yd

3

)

Material Density

PLEASE CONTACT

www.hyundai-ce.com EN - 2007.07 Rev 0

HL757-7A_new_en 23-08-2007 09:24 Pagina 12