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Performance and availability describe the Cat® 558 Forest Machine. Purpose built, it features extreme-duty component frames that can handle the machine's powerful engine and hydraulics systems ensuring productivity, durability and lower operating costs. Options are available to fit the 538 to your specific forestry tasks.


  • Engine Model Cat C7.1 Cat C7.1
  • Net Flywheel Power 239.0 HP 178.0 kW
  • Gross Power 239.0 HP 178.0 kW
  • Displacement 428.0 in³ 7.01 l
  • Engine Speed - Operation 1750.0 r/min 1750.0 r/min
  • Engine Speed - Travel 1800.0 r/min 1800.0 r/min
  • Gross Power at 2,200 rpm 239.0 HP 178.0 kW
  • Number of Cylinders 6 6


  • Estimated Operating Weight without Attachment: General Forestry (Reach) 85239.0 lb 38664.0 kg

Service Refill Capacities

  • Cooling System 7.9 gal (US) 30.0 l
  • Swing Drive 2.9 gal (US) 11.0 l
  • Hydraulic Tank 46.2 gal (US) 175.0 l
  • Final Drive - Each 2.9 gal (US) 11.0 l
  • Hydraulic System - Total 81.9 gal (US) 310.0 l
  • Fuel Tank - CWT 261.4 gal (US) 989.3 l
  • Engine Crankcase 6.3 gal (US) 24.0 l
  • DEF Tank 12.2 gal (US) 46.0 l

Hydraulic System

  • Auxiliary Pump - Reach with Rotate: Pump Drive Gear Ratio 1.28:1 1.28:1
  • Auxiliary Pump - Reach with Rotate: Maximum Flow 37.2 gal/min 141.0 l/min
  • Main Pumps - Maximum Flow - Both Pumps 126.8 gal/min 480.0 l/min
  • Maximum System Pressure - Heavy Lift Mode 5511.0 psi 38000.0 kPa
  • Maximum System Pressure - Travel 5076.0 psi 35000.0 kPa
  • Main Pumps - Maximum Flow - Per Pump 63.4 gal/min 240.0 l/min
  • Auxiliary Pump - Reach with Rotate: Maximum Pressure 1499.0 psi 10335.0 kPa
  • Maximum System Pressure - Swing 4641.0 psi 32000.0 kPa
  • Maximum System Pressure - Implements 5076.0 psi 35000.0 kPa

Operating Specifications

  • Maximum Speed - Turtle 1.5 mile/h 2.4 km/h
  • Maximum Swing Speed (GF) 7.5 r/min 7.5 r/min
  • Swing Torque (GF) 74494.0 ft·lbf 101.0 kN·m
  • Maximum Speed - Rabbit 2.3 mile/h 3.7 km/h
  • Maximum Drawbar Pull 72164.0 lbf 321.0 kN


  • Undercarriage Pitch 8.5 in 215.9 mm
  • Track Length 199.7 in 5072.0 mm
  • Track Gauge 115.0 in 2921.0 mm
  • Ground Clearance 29.5 in 749.0 mm

Dimensions - General Forestry - Boom Stretched Out

  • Ground Clearance 29.5 in 749.0 mm
  • Width - With 700 mm (28 in) Shoes 142.6 in 3621.0 mm
  • Overall Length (Reach) 499.2 in 12680.0 mm
  • Track Length 199.7 in 5072.0 mm
  • Track Gauge 115.0 in 2921.0 mm
  • Tail Swing Radius 143.8 in 3653.0 mm
  • Boom Height 146.5 in 3720.0 mm
  • Height of Tilted Side Entry Cab 137.7 in 3498.0 mm
  • Overall Height 164.5 in 4178.0 mm
  • Distance Between Idler and Sprocket Centerline 158.2 in 4019.0 mm


  • Cat C7.1 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


  • 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


  • 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


  • 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

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