Hyundai R55-7A Owner Manual
Hyundai R55-7A is a mini crawler excavator with a 57 HP Yanmar engine, providing exceptional power and torque for demanding tasks. Its advanced hydraulic system ensures smooth and precise operation, while the reinforced lower frame and durable undercarriage guarantee stability and longevity. The spacious and comfortable cab offers excellent visibility and ergonomic controls for enhanced operator experience. With its offset boom swing, powerful dozer blade, and easy-to-reach control levers, the Hyundai R55-7A is an ideal choice for various construction and excavation projects.
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MINI CRAWLER EXCAVATOR Applied Tier 3 Engine
55-7A
I Photo may include optional equipment
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Robex 55 -7A
Highest Engine Power in its Class
YANMAR 4TNV98-EPHYB
42.5 kW (57 HP) / 2,400 rpm
With a rated power of 57 HP at 2,400 rpm the Yanmar 4TNV98-
EPHYB engine provides 205 Nm (148 lbf.ft) of maximum torque.
The R55-7A, with the highest power in its class, gives you more power to get the job done.
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Maximum Workability
Comfortable Operating Environment
Advanced Hydraulic System
Enhanced Durability & Reliability
Improved Fuel Efficiency
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Robex 55 -7A
Technology in Cab Design
Wide Comfortable Operating Space
All the controls are designed and positioned according to the latest ergonomic research.
Reinforced pillars have been added for greater cab rigidity.
Reliable Instrument Panel
All information such as engine RPM, engine coolant temp., fuel status and the state of all electric switches are displayed on the instrument panel to provide the operator with the exact condition of machine.
This makes troubleshooting much easier.
M M DE
Comfortable Operating Space
Radio & CD Player
Deluxe radio & CD player is located at a convenient position.
Dial Type Engine Speed Switch and
Key Switch
Wide Cab with Excellent Visibility
The cab is spacious and ergonomically designed with low noise level and good visibility.
A full view front window, large rear and side windows provide excellent visibility in all directions.
High-output Air Conditioner &
Heater
Large capacity air conditioning system is installed for operator’s comfort in all climates.
For more convenience, the cab is equipped with a window-defroster for cold seasons.
755mm
Sensitive Joysticks and Easy
Entrance
New joystick grips for precise control have been equipped with 4 switches.
Tilting tower combined with large door provides more space to enter the cabin.
Left
Right
Horn / Dummy
Breaker / Dummy
Smooth Travel Pedals and
Foot Rests
Travel pedals and levers are equipped with ergonomically designed foot rests, for quick and easy work.
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Sliding Side Window
Sliding window enables operator to communicate outside and air to circulate without opening main door.
Big Size Sun Visor & Roof Glass
Glass on top front corner is large enough to give better visibility while sun visor protects operator from exposing to direct sunlight.
Rise-up Wiper
Rise-up wiper gives better front view to operator during rainy weather conditions.
Easy to Open Front Window
Sliding fold-in front window is easily opened and safely maintained in open position to improve working conditions.
Roof Glass : Bronze color laminated glass
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Robex 55 -7A
Improved technology and modified look
Strong and Stable Lower Frame
Reinforced box-section frame is all welded with lowstress and high-strength steel.
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Robex 55 -7A
Exceptional Traction &
Lifting Capacity
Considerable traction and lifting force enables fast work.
Reinforced Bucket
Higher bucket link durability and antiwear characteristics with additional reinforcement plates on cutting edge section. The bucket is reinforced with thicker steel and additional lateral plate.
Reinforced Arm
To protect the arm from impacts and wear, reinforcements are welded at the inner side of the arm.
Grade-ability
Grade-ability of 35 degrees (70%) and long tumbler distance make it easier to work on a slope.
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Powerful and Dynamic
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Anti-Restart System
During operation the anti-restart system prevents activation of the starter.
Easy-to-Reach Control Levers
Switches and other controls are located near the operator.
This reduces operator movements and enhances control with less operator fatigue.
Installation for Breaker Operation
Overload relief value and pipes are installed standard for customer’s convenience.
Offset Boom Swing
The R55-7A is designed for efficient work in congested residential and urban areas.
The boom can be offset within a range of 130 degrees.
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Robex 55 -7A
Performance and Durability
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Assembly of Bucket and Dozer
Blade
Boom-arm-bucket kinematics is designed to minimize dead space between bucket and blade during efficient grading work.
Powerful Dozer Blade
Large size dozer blade improves work efficiency, equipment durability and stability.
FEM (Finite Element Method)
Durability of structure is proven through
FEM (Finite Element Method) analysis and long term durability test.
Tough, Durable Undercarriage
The R55-7A has an undercarriage constructed with tough, durable, robotically welded steel. Tapered, upper roller side supports were installed to keep tracks properly aligned at all times.
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Rectangular Tube Cabin
Certified cabin for ROPS, FOPS and TOPS increases safety of operator in case external force is exerted on cabin.
Boom Cylinder Cover
Boom cylinder cover is installed as standard to prevent cylinder damage.
Applied Side Protector
In case of close turning, the side protector prevents any damage to engine hood.
Large Capacity Radiator
To improve performances for a heavy duty job, a large capacity radiator is installed.
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Robex 55 -7A
Easy Change of Air Cleaner
The R55-7A is fitted with durable plastic air cleaner for easy maintenance and quick service.
Fuel Filler Pump (Option)
Electric fuel filler pump to facilitate fuel filling of the machine.
High Capacity Water Separator
& Fuel Filter
To protect the injection system and minimize the risk of fuel breakdown, high capacity fuel filter and transparent water separator are applied for durability.
Centralized Grease Fittings
Grease fittings are centralized for easy access during service checks, saving time and money.
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Reliability and Serviceability
Full open doors and master key system provide easy access for servicing.
Easy to Maintain Engine Components
The R55-7A is designed with accessibility in mind. All doors, covers and hoods are built for complete open access.
You’ll find that the R55-7A offers plenty of space to complete your regular maintenance and service hassle-free.
Long Life Hydraulic Filter
High-performance filtering materials are applied for longer filter replacement intervals.
I Photo may include optional equipment
Centralized Fuse Box
Fuse box is arranged on the rear of seat for easy service.
Large Capacity Fuel Tank
The large capacity fuel tank provides longer working time.
Master Switch
The master switch enables checking and maintaining the battery while minimizing the discharge of battery.
Smooth and precise swing control
Shock absorbing design is improved to stop and start swing precisely and smoothly.
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S
pecifications
Engine
Model
Type
Rated flywheel horse power
J1995 (gross)
SAE
J1349 (net)
DIN
6271/1 (gross)
6271/1 (net)
Max. torque
Bore x stroke
Displacement
Battery
Starter motor
Alternator
YANMAR 4TNV98-EPHYB
Water cooled, 4 cycle diesel 4 cylinders in line, direct injection, low emission
42.5 kW (57 HP) at 2,400 rpm
41.2 kW (55,2 HP) at 2,400 rpm
42.5 kW (57,8 HP) at 2,400 rpm
41.2 kW (56 HP) at 2,400 rpm
205 Nm (148 lbf.ft) at 1,550 rpm
98 mm (38.6") x 110 mm (4.33")
3,319 cc (203 cu in)
1 x 12 V x 100 AH
12 V-3.0 kW
12 V-80 A
Hydraulic System
Main pump
Type
Rated flow
Sub-pump for pilot circuit
Hydraulic motors
Two variable displacement piston pumps
2 x 55.2 /min (12.1 gpm) pumps
Gear pump
Travel
Two speed axial piston motor with counter balance valve and parking brake
Axial piston motor with automatic brake Swing
Relief valve setting
Implement circuits
Travel circuit
Swing circuit
Pilot circuit
Service valve
Hydraulic cylinders
21.58 MPa (3,130 psi)
21.58 MPa (3,130 psi)
21.10 MPa (3,060 psi)
2.96 MPa ( 430 psi)
Installed
No. of cylinderbore x rod x stroke
Boom :
Arm :
Bucket
Boom swing :
Dozer blade :
1 - 110 x 65 x 715 mm (4.3" x 2.6" x 28.1")
1 - 90 x 55 x 850 mm (3.5" x 2.2" x 33.5")
1 - 80 x 50 x 660 mm (3.1" x 2.0" x 26.0")
1 - 95 x 50 x 527 mm (3.7" x 2.0" x 20.7")
1 - 110 x 60 x 214 mm (4.3" x 2.4" x 8.4")
Drives & Brakes
Drive method
Drive motor
Reduction system
Max. drawbar pull
Max. travel speed (high) / (low)
Grade-ability
Parking brake
Full hydrostatic type
Axial piston motor, in-shoe design
Planetary reduction gear
53 kN (11,700 lbf)
4.1 km/hr (2.5 mph) / 2.2 km/hr (1.4 mph)
35° (70%)
Multi-wet disc
Swing System
Swing motor
Swing reduction
Swing brake
Swing speed
Axial piston motor
Planetary gear reduction
Multi wet disc
9.3 rpm
Controls
Pilot pressure-operated joysticks and pedals provide almost effortless operation.
Pilot control
Traveling and steering
External Lights
Two joysticks with one safety lever
(LH): Boom Swing and arm,
(RH): Boom and bucket (ISO)
Two levers with pedals
Two lights mounted on the boom, one below the cab
Coolant & Lubricant Capacity
(Refilling)
Fuel tank
Engine coolant
Engine oil
Swing device-gear oil
Final drive(each)
Hydraulic tank
Hydraulic system liter
120.0
10.0
11.6
1.5
1.2
70.0
120.0
US gal
31.7
2.6
3.1
0.4
0.3
18.5
31.7
UK gal
26.4
2.2
2.6
0.3
0.2
15.4
26.4
Undercarriage
X-leg type center frame is integrally welded with reinforced box-section track frames. The undercarriage includes lubricate rollers, track adjusters with shock absorbing springs and sprockets, and track chain with triple grouser shoes.
Center frame
Track frame
No. of shoes on each side
No. of carrier roller on each side
No. of track roller on each side
X - leg type
Pentagonal box type
40
1
5
Operating Weight (approximate)
Operating weight, including 3,000 mm (9 ' 10") boom, 1,600 mm (5 ' 3") arm, SAE heaped 0.18 m 3 (0.24 yd 3 ) digging bucket, lubricant, coolant, full fuel tank, hydraulic tank and standard equipment.
Major component weight
Upper structure
Counterweight
Mono boom (with arm cylinder)
Operating Weight
Operating weight
2,650 kg ( 5,840 lb)
200 kg ( 440 lb)
310 kg ( 680 lb)
5,450 kg (12,020 lb)
• Mono boom with blade
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Buckets
Capacity
SAE heaped
CECE heaped
Without side cutters
0.07 m 3 (0.09 yd 3 )
* 0.18 m
3 (0.24 yd 3 )
0.06 m
0.15 m
3
3
(0.08 yd
(0.20 yd
3
3
)
)
315 mm (12.4")
670 mm (26.3")
* :
:
Standard digging bucket
Applicable for materials with density 1,600 kg/m 3 (2,700 lb/yd 3 ) or less
:
Applicable for materials with density 1,100 kg/m 3 (1,850 lb/yd 3 ) or less
Arm
Length
Weight
Bucket digging force
Arm crowd force
SAE
ISO
SAE
ISO
* 1,600 mm (5' 3")
210 kg (460 lb)
37.7 kN
3,850 kgf
8,490 lbf
42.4 kN
4,330 kgf
9,550 lbf
28.4 kN
2,900 kgf
6,390 lbf
31.9 kN
3,260 kgf
7,190 lbf
Width
With side cutters
360 mm (14.2")
735 mm (29.0")
1,900 mm (6' 3")
230 kg (510 lb)
37.7 kN
3,850 kgf
8,490 lbf
42.4 kN
4,330 kgf
9,550 lbf
25.5 kN
2,600 kgf
5,730 lbf
28.7 kN
2,930 kgf
6,460 lbf
Weight
84 kg (185 lb)
137 kg (300 lb)
SAE heaped
3.0 m (9' 10") Boom
1.6 m (5 ' 3") arm
0.07 m 3 (0.09 yd 3 )
* 0.18 m
3 (0.24 yd 3 )
Lifting Capacities R55-7A
Rating over-front Rating over-side or 360 degree
5.0 m
(16.40 ft)
4.0 m
(13.12 ft)
3.0 m
(10 ft)
2.0 m
(5 ft)
1.0 m
(5 ft)
Ground Line
-1.0 m
(-5 ft)
-2.0 m
(-5 ft)
-3.0 m
(-10 ft)
• Boom : 3.0 m (9’ 10”) • Arm : 1.6 m (5’ 3”) • Bucket : 0.18 m 3 (0.24 yd 3 ) SAE heaped • Dozer blade down with 200 kg (440 lb) counterweight.
Load point height m (ft)
2.0 m (5 ft) 3.0 m (10 ft)
Load radius
4.0 m (13.12 ft) 5.0 m (16.40 ft) kg lb kg lb kg lb kg lb kg lb kg lb kg lb kg lb kg lb
*3060
*6750
*2340
*5160
*3600
*7940
*3780
*8330
*2060
*4540
*3060
*6750
*2340
*5160
2760
6080
2800
6170
*2060
*4540
*1690
*3730
2230
4920
2160
4760
2140
4720
2160
4760
1610
3550
1490
3280
1430
3150
1410
3110
1430
3150
*1020
*2250
*1090
*2400
*1330
*2930
1420
3130
1380
3040
1360
3000
*1020
*2250
1070
2360
1020
2250
970
2140
930
2050
920
2030
1030
2270
1000
2200
990
2180
710
1570
680
1500
670
1480
*950
*2090
*980
*2160
880
1940
810
1790
790
1740
840
1850
960
2120
*1150
*2540
At max. reach
Capacity
• Boom : 3.0 m (9’ 10”) • Arm : 1.9 m (6’ 3”) • Bucket : 0.18 m 3 (0.24 yd 3 ) SAE heaped • Dozer blade down with 200 kg (440 lb) counterweight.
Load point height m (ft)
2.0 m (5 ft) 3.0 m (10 ft)
Load radius
4.0 m (13.12 ft) 5.0 m (16.40 ft)
5.0 m
(16.40 ft)
4.0 m
(13.12 ft)
3.0 m
(10 ft)
2.0 m
(5 ft)
1.0 m
(5 ft)
Ground Line
-1.0 m
(-5 ft)
-2.0 m
(-5 ft)
-3.0 m
(-10 ft)
NOTES kg lb kg lb kg lb kg lb kg lb kg lb kg lb kg lb kg lb
*2090
*4610
*2320
*5110
*3260
*7190
*4150
*9150
*2770
*6110
*2090
*4610
*2320
*5110
2720
6000
2760
6080
*2770
*6110
*1450
*3200
*2170
*4780
2160
4760
2120
4670
2130
4700
*1650
*3640
1400
3090
1400
3090
1460
3220
*1450
*3200
1510
3330
1430
3150
1. Lifting capacity is based on SAE J1097, ISO 10567.
2. Lifting capacity of the Robex Series does not exceed 75% of tipping load with the machine on firm, level ground or 87% of full hydraulic capacity.
*950
*2090
*1200
*2650
1430
3150
1380
3040
1350
2980
1360
3000
*950
*2090
1030
2270
980
2160
930
2050
910
2010
910
2010
*1000
*2200
1030
2270
1000
2200
980
2160
970
2140
730
1610
710
1570
680
1500
660
1460
650
1430
*870
*1920
*900
*1980
810
1790
750
1650
730
1610
770
1700
860
1900
1120
2470
3. The load point is a hook (standard equipment) located on the back of the bucket.
4. (*) indicates load limited by hydraulic capacity.
At max. reach
Capacity
500
1100
490
1080
510
1120
580
1280
760
1680
*870
*1920
650
1430
550
1210
*950
*2090
730
1610
600
1320
550
1210
540
1190
560
1230
650
1430
900
1980
Reach m
(ft)
4.56
(15.0)
5.89
(19.3)
6.12
(20.1)
6.13
(20.1)
5.92
(19.4)
5.46
(17.9)
4.65
(15.3)
Reach m
(ft)
4.12
(13.5)
5.07
(16.6)
5.59
(18.3)
5.83
(19.1)
5.84
(19.2)
5.62
(18.4)
5.13
(16.8)
4.22
(13.8)
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Dimensions
Working Ranges
Boom length
Arm length
A Max. digging reach
A ' Max. digging reach at ground
B Max. digging depth
B ' Max. digging depth
(8 ft level)
C Max. vertical wall digging depth
D Max. digging height
E Max. dumping height
F Min. front radius
1,600 mm (5 '
3 , 0 0 0 m m ( 9 ' 1 0 " )
3
6,150 mm (20' 2")
") 1,900 mm (6' 3")
6,400 mm (21' 0")
6,010 mm (19' 9") 6,270 mm (20' 7")
3,820 mm (12' 6") 4,060 mm (13' 4")
3,420 mm (11' 3") 3,700 mm (12' 2")
3,200 mm (10' 6")
5,780 mm (18' 12")
4,050 mm (13' 3")
2,350 mm ( 7' 9")
3,460 mm (11' 4")
5,920 mm (19' 5")
4,180 mm (13' 9")
2,360 mm ( 7' 9")
Unit (mm)
Standard Equipment
•
•
•
ISO standard cabin
Cabin ROPS (ISO 3471)
FOPS (ISO 3449)
TOPS (ISO 12117)
All-weather steel cab with all-around visibility
Safety glass windows
•
•
•
•
Sliding fold-in front window
Sliding side window
Lockable door
Accessory box & Ash-tray
Heater & Defroster
Air-conditioner
(4,000 kcal/hr, 16,000 BTU/hr)
Centralized monitoring
•
•
Engine speed
Gauges
Fuel level gauge
Engine coolant temperature gauge
• Warning
Fuel level
Engine oil pressure
Engine coolant temperature
Hyd. oil temperature
Low battery
Air cleaner closing
• Fuel prefilter
Door and cab locks, one key
AM/FM radio and cassette
Two outside rear view mirrors
Fully adjustable suspension seat with seat belt
Console box tilting system (LH.)
Four front working lights
Electric horn
Battery (1 x 12 V x 100 AH)
Battery master switch
12 volt power supply (DC-DC converter)
Removable clean out screen for radiator
Automatic swing brake
Removable reservoir tank
Water separator, fuel line
Counterweight (210 kg; 460 lb)
Mono boom (3.0 m; 9’ 10”)
Arm (1.6 m; 5’ 3”)
Track shoes (400 mm, 15.7”)
Track rail guard
Optional Equipment
Fuel filler pump (35 /min, 7.7 gpm)
Beacon lamp
Piping kit (breaker, etc)
Double acting piping kit (clamshell, etc)
Accumulator, work equipment lowering
Travel alarm
Quick coupler
Rubber crawler (400 mm, 16”)
Narrow bucket (0.07 m 3 , 0.09 yd 3 )
Arm (1.9 m)
Mechanical suspension seat with heater
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 are rounded off to nearest value. Materials and specifications are subject to change without notice.
PLEASE CONTACT
www.hyundai.eu
EN - 2008. 03 Rev 0.

Public link updated
The public link to your chat has been updated.
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Key features
- Highest engine power in its class (57 HP)
- Reinforced lower frame and durable undercarriage
- Advanced hydraulic system for smooth and precise operation
- Spacious and comfortable cab with excellent visibility
- Ergonomic controls and easy-to-reach levers
- Offset boom swing for efficient work in congested areas
- Powerful dozer blade for grading and leveling tasks