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


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

Service Refill Capacities

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

Hydraulic System

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

Operating Specifications

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


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

Dimensions - General Forestry - Boom Stretched Out

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


  • 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