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Hyundai R55-9A Excavator

Net Power 65.1 hp (48.5 kW) at 2,400 rpm
Operating Weight 5,650 kg (12,460 Ibs)
Standard Bucket 0.18 m3 (0.24 yd3)

Performance

  • Yanmar Tier 4 Final Engine
  • Boom Swing
  • Dozer Blade
  • Standard Tail Swing

Convenience

  • Monitor
  • Suspension Seat
  • Ergonomic Controls & Switches
  • Cab Entry

Serviceability

  • Centralized Lubrication
  • Long-life Components
  • Easy Access
  • Durable Cooler

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Overview

Operating a 9A series is unique to every operator. Operators can fully customize their work environment and operating preferences to fit their individual needs. 9A series is designed for maximum performance to keep the operator working productively.

Reliable & Durable

Hyundai construction equipment is precision designed with trusted and proven components and systems from leading OEM’s. The R55-9A is designed to be rugged and reliable for longer up time, reduced operating cost and improved productivity.

Engine & Hydraulic System

  1. Engine: Model
    YANMAR 4TNV98C
  2. Engine: Type
    Water-cooled, 4-cycle diesel 4 cylinders in line, direct injection, low emission
  3. Engine: Max. torque
    24 kgf. m (173.6 lbf. ft) at 1,560 rpm
  4. Engine: Bore X stroke
    98 mm (3.85") x 110 mm (4.33")
  5. Engine: Piston displacement
    3,319 cc (203 in3 )
  6. Battery
    1 x 12 V x 100 Ah
  7. Starting motor
    12 V - 3.0 kW
  8. Alternator
    12 V - 60 Amp
  9. Main Pump: Type
    Two variable displacement piston pumps + gear pump
  10. Main Pump: Max flow
    2 X 57.8 ℓ/min (15.3 gpm) pumps + 38.4 ℓ/min (10.1 gpm) at 2,100 rpm
  11. Main Pump: Sub-pump for pilot circuit (Gear pump)
    9.5 ℓ/min (2.5 gpm)

Cross-Sensing & Fuel-Saving Pump System

  1. Hydraulic Motors - Travel
    Two speed axial piston motor with counter balance valve and parking brake
  2. Hydraulic Motors - Swing
    Axial piston motor with automatic brake
  3. Relief Valve - Implement circuits
    240 kgf/cm2 (3,410 psi)
  4. Relief Valve - Travel circuit
    220 kgf/cm2 (3,130 psi)
  5. Relief Valve - Swing circuit
    220 kgf/cm2 (3,130 psi)
  6. Relief Valve - Pilot circuit
    30 kgf/cm2 (430 psi)
  7. Relief Valve - Service valve
    Installed
  8. Hydraulic Cylinders - No. of cylinders bore X stroke
    Boom: 1-110 x 715 mm (4.3” x 28.1”)
    Arm: 1-90 x 850 mm (3.5” x 33.5”)
    Bucket: 1-80 x 660 mm (3.1” x 26.0”)
    Boom swing: 1-95 x 527 mm (3.7” x 20.7”)
    Dozer blade: 110 x 219 mm (4.3" x 8.8")

Travel System

  1. Drive method
    Full hydrostatic type
  2. Drive motor
    Axial piston motor, in-shoe design
  3. Reduction system
    2-stage planetary
  4. Max. drawbar pull
    5,300 kgf (11,700 lbf)
  5. Max. travel speed (high) / (low)
    4.2 km/hr (2.6 mph) / 2.2 km/hr (1.4 mph)
  6. Gradeability
    35° (70%)
  7. Parking brake
    Multi-wet disc

Swing System

  1. Swing motor
    Axial piston motor
  2. Swing reduction
    Planetary gear reduction
  3. Swing bearing lubrication
    Grease-bathed
  4. Swing brake
    Multi wet disc
  5. Swing speed
    9.1 rpm

Controls

  1. Pilot control
    Two joysticks with one safety lever
    (LH): Arm swing, Boom swing
    (RH): Boom and bucket (ISO)
  2. Traveling and steering
    Two levers with pedals
  3. Engine throttle
    Electric, dial type

Weight (Approximate)

  1. Operating weight (cab)
    5,750 kg (12,570 lb)
  2. Ground pressure (cab)
    0.33 kg/cm2 (4.69 psi)

Coolant and Lubricant Capacities (Refilling)

  1. Fuel tank
    120L (31.7 gal)
  2. Engine coolant
    9.5L (2.5 gal)
  3. Engine oil
    11.6L (3.1 gal)
  4. Swing device - gear oil
    1.5L (0.4 gal)
  5. Final drive (each)
    1.2L (0.3 gal)
  6. Hydraulic tank
    70L (18.5 gal)
  7. Hydraulic system
    120L (31.7 gal)

Undercarriage

  1. Center frame
    X - leg type
  2. Track frame
    Pentagonal box type
  3. No. of track shoes on each side
    40
  4. No. of upper rollers on each side
    1
  5. No. of lower rollers on each side
    5
Hyundai R55-9A Dimensions Diagram

Dimensions mm (ft-in)

  1. A - Overall height of cab
    2,550 (8' 4")
  2. B - Tail swing radius
    1,650 (5' 5")
  3. C - Tumbler distance
    1,990 (6' 6")
  4. D - Overall length
    5,600 (18' 4")
  5. E - Track shoe width
    Steel: 380 (1' 3") | Rubber: 400 (1' 4")
  6. F - Track gauge
    1,600 (5' 3")
  7. G - Overall width
    2,000 (6' 7")
  8. H - Ground clearance
    380 (1' 3")
  9. 115 kg (255 lb) Bucket
    Capacity SAE Heaped: 0.07 m3 (0.09 yd3 )
    Capacity CECE Heaped: 0.06 m3 (0.08 yd3 )
    Width without side cutters: 315 mm (12.4")
    Width with side cutters: 360 mm (14.2")
  10. 170 kg (375 lb) Bucket
    Capacity SAE Heaped: 0.18 m3 (0.24 yd3 )
    Capacity CECE Heaped: 0.15 m3 (0.20 yd3 )
    Width without side cutters: 670 mm (26.4")
    Width with side cutters: 740 mm (29.1")

Working Range mm (ft-in)

  1. Boom length
    3,000 (9' 10")
  2. Arm length
    1,600 (5' 3") | 1,900 (6' 3")
  3. A - Max. digging reach
    6,150 (20' 2") | 6,400 (20' 1")
  4. A1 - Max. digging reach on ground
    6,010 (19' 9") | 6,270 (20' 7")
  5. B - Max. digging depth
    3,820 (12' 6") | 4,060 (13' 4")
  6. B1 - Max. digging depth (8 ft)
    3,420 (11' 3") | 3,700 (12' 2")
  7. C - Max. vertical wall digging depth
    3,200 (10' 6") | 3,460 (11' 4")
  8. D - Max. digging height
    5,780 (18' 12") | 5,920 (19' 5")
  9. E - Max. dumping height
    4,050 (13' 3") | 4,180 (13' 9")
  10. F - Min. swing radius
    2,350 ( 7' 9") | 2,360 ( 7' 9")
  11. G - Tail swing radius
    1,650 (5' 5") | 1,650 (5' 5")