558 Forest Machine

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  • Cat 178 kW (239 hp) C7.1 ACERT™ Tier 4 Final engine with increased horsepower maintains maximum performance under load
  • Strong hydraulic horsepower for efficient implement performance and greater productivity
  • An increase in swing torque of 17 percent on General Forestry models, provides added power to move trees, which enables more efficiency and productivity
  • Heavy lift mode features increased lift capacity to handle larger payloads with improved control
  • 989 L (261 gal) counterweight fuel tank for extended machine operation and maximum uptime
  • Machine width and track length designed for stability in varied logging applications


  • Engine, hydraulics, and work tool integration are optimized to minimize power losses and increase overall machine efficiency
  • Steady state high idle speed and U.S. EPA Tier 4 Final technology reduce fuel consumption
  • Larger hydraulic pump allows engine to operate at lower rpms with increased performance to maximize efficiency
  • Component layout and back-to-back main hydraulic control valve reduce oil flow restrictions and aid in greater fuel economy
  • Machine designed for integration and optimization with Cat grapples
  • Powerful, multi-functioning hydraulics, combined with strong machine performance ensure work tools function quickly and smoothly to complete work faster

Application Versatility

  • Boom arrangements and hydraulic systems for specific applications enable more effective road building, loading, processing, shoveling, or millyard stacking
  • New track option meets shovel logging application requirements
  • Purpose built processor cab option that includes 19 mm (0.75 in) front windows

Reliability and Durability

  • Variable pitch, reversing cooling fan maintains optimum fluid temperature in heavy duty forestry applications
  • Cooling capacity increased 33 percent for trouble-free operation
  • Purpose built upper frame, high-wide carbody, robust linkage configurations, and heavy-duty enclosures are reinforced with thick doubler plates, extra gussets, and other reinforcements for structural integrity in severe applications
  • Large, 216 mm (8.5 in) pitch (349 HEX), grease lubricated tracks, provide excellent life in variable forestry working conditions
  • Validated and proven excavator technologies ensure overall machine reliability


  • One-piece engine hood design, with two opening angles, allows easy access to engine and cooling compartments
  • Side-by-side engine and hydraulic coolers are easy to access for cleaning, while reduced cooling fins per inch allows better debris flow-through and reduced clogging potential
  • 0.71 m3 (25 ft3) of storage space at ground level, provides ready access to tools, equipment, and supplies that operators use daily

Operator Comfort and Technology

  • Premium fit and finishes to maximize operator experience
  • Fully adjustable, air ride cab seat that includes heating and cooling capability for comfort and reduced operator fatigue
  • LED lights increase visibility
  • Rear entry cab option provides safe access through a fully lit platform through the use of a key FOB
  • Rear entry cab window design improves visibility for shovel logging and other applications
  • Rear entry cab includes a new innovative cab lock down system that minimizes transport time and improves uptime
  • Tool control as standard equipment for swapping and selecting tools quickly and efficiently
  • Cat Product Link™ allows for remote location of a machine and enables tracking of fuel consumption and other events
Engine Model Cat C7.1 ACERT
Net Flywheel Power 178 kW (239 hp)
Gross Power 178 kW (239 hp)
Gross Power at 2,200 rpm 178 kW (239 hp)
Engine Speed: Operation 1750 rpm (1750 rpm)
Engine Speed: Travel 1800 rpm (1800 rpm)
Displacement 7.01 L (428 in3)
Number of Cylinders 6
Estimated Operating Weight without Attachment: General Forestry (Reach) 38664 kg (85239 lb)
Operating Specifications
Maximum Speed (turtle) 2.4 km/h (1.5 mph)
Maximum Speed (rabbit) 3.7 km/h (2.3 mph)
Maximum Drawbar Pull 321 kN (72164 lbf)
Swing Torque (GF) 101 kNu2219m (74494 lbf-ft)
Maximum Swing Speed (GF) 7.5 rpm (7.5 rpm)
Hydraulic System
Main Pumps Maximum Flow (per pump) 240 L/min (63.4 gal/min)
Main Pumps Maximum Flow (both pumps) 480 L/min (126.8 gal/min)
Maximum System Pressure: Implements 35000 kPa (5076 psi)
Maximum System Pressure: Travel 35000 kPa (5076 psi)
Maximum System Pressure: Swing 32000 kPa (4641 psi)
Maximum System Pressure: Heavy Lift Mode 38000 kPa (5511 psi)
Auxiliary Pump u2013 Reach with Rotate: Pump Drive Gear Ratio 1.28:1
Auxiliary Pump u2013 Reach with Rotate: Maximum Flow 141 L/min (37.2 gal/min)
Auxiliary Pump u2013 Reach with Rotate: Maximum Pressure 10335 kPa (1499 psi)
Service Refill Capacities
Fuel Tank u2013 CWT 989.3 L (261.4 gal)
DEF Tank 46.0 L (12.2 gal)
Engine Crankcase 24.0 L (6.3 gal)
Cooling System 30.0 L (7.9 gal)
Final Drive u2013 Each 11.0 L (2.9 gal)
Hydraulic Tank 175.0 L (46.2 gal)
Hydraulic System u2013 Total 310.0 L (81.9 gal)
Swing Drive 11.0 L (2.9 gal)
Undercarriage Pitch 215.9 mm (8.5 in)
Track Gauge 2921 mm (115.0 in)
Track Length 5072 mm (199.7 in)
Ground Clearance 749 mm (29.5 in)
Dimensions: General Forestry (boom stretched out)
Height of Tilted Side Entry Cab 3498 mm (137.7 in)
Boom Height 3720 mm (146.5 in)
Overall Height 4178 mm (164.5 in)
Overall Length (Reach) 12680 mm (499.2 in)
Tail Swing Radius 3653 mm (143.8 in)
Distance Between Idler and Sprocket Centerline 4019 mm (158.2 in)
Track Length 5072 mm (199.7 in)
Ground Clearance 749 mm (29.5 in)
Track Gauge 2921 mm (115.0 in)
Width with 700 mm (28 in) Shoes 3621 mm (142.6 in)

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