Detailed instructions for use are in the User's Guide.
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MINI CRAWLER EXCAVATOR Applied Tier 3 Engine
55-7A
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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 4TNV98EPHYB 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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Hyundai Robex 55-7A
Maximum Workability Comfortable Operating Environment Advanced Hydraulic System Enhanced Durability & Reliability Improved Fuel Efficiency
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HYUNDAI CONSTRUCTION EQUIPMENT 02 /
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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. [. . . ] 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.
Roof Glass : Bronze color laminated glass
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.
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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. 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.
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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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Specifications
Engine
Model Type Rated flywheel horse power SAE DIN Max. torque Bore x stroke Displacement Battery Starter motor Alternator J1995 (gross) J1349 (net) 6271/1 (gross) 6271/1 (net) 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 YANMAR 4TNV98-EPHYB Water cooled, 4 cycle diesel 4 cylinders in line, direct injection, low emission
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
Hydraulic System
Main pump Type Rated flow Sub-pump for pilot circuit Hydraulic motors Travel Swing Relief valve setting Implement circuits Travel circuit Swing circuit Pilot circuit Service valve Hydraulic cylinders Boom : Arm : No. of cylinderbore x rod x stroke 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") 21. 58 MPa (3, 130 psi) 21. 58 MPa (3, 130 psi) 21. 10 MPa (3, 060 psi) 2. 96 MPa ( 430 psi) Installed Two speed axial piston motor with counter balance valve and parking brake Axial piston motor with automatic brake Two variable displacement piston pumps 2 x 55. 2 /min (12. 1 gpm) pumps Gear pump
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. of track roller on each side X - leg type Pentagonal box type 40 1 5
Drives & Brakes
Drive method Drive motor Reduction system Max. [. . . ] front radius
3, 000 mm (9' 10") 1, 900 mm (6' 3") 1, 600 mm (5' 3") 6, 150 mm (20' 2") 6, 400 mm (21' 0") 6, 010 mm (19' 9") 3, 820 mm (12' 6") 3, 420 mm (11' 3") 3, 200 mm (10' 6") 5, 780 mm (18' 12") 4, 050 mm (13' 3") 2, 350 mm ( 7' 9") 6, 270 mm (20' 7") 4, 060 mm (13' 4") 3, 700 mm (12' 2") 3, 460 mm (11' 4") 5, 920 mm (19' 5") 4, 180 mm (13' 9") 2, 360 mm ( 7' 9")
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 m3, 0. 09 yd3) Arm (1. 9 m) Mechanical suspension seat with heater
Standard and optional equipment may vary. Materials and specifications are subject to change without notice.
PLEASE CONTACT
www. hyundai. eu
EN - 2008. [. . . ]