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FM538 GF/FM538 LL

Engine Model

Cat C7.1

Net Power - ISO 9249

172 HP

Engine Power - ISO 14396

174 HP


The Cat® FM538 is the best choice in its size class for today’s loggers. With its high-visibility forestry cab and factory logging configurations tailored to meet your needs, the FM538 makes your work in the woods more productive and profitable.



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  • Engine
    Spec Value
    Engine Model Cat C7.1
    Net Power - ISO 9249 172 HP
    Engine Power - ISO 14396 174 HP
    Net Power - ISO 9249 (DIN) 175 hp (metric)
    Engine Power - ISO 14396 (DIN) 176 hp (metric)
    Bore 4 in
    Stroke 5 in
    Displacement 428 r/min
    Biodiesel Capability B20¹
    Emissions Meets U.S. EPA Tier 4 Final, EU Stage V emission standards.
    Note (1) Net power advertised is the power available at the flywheel when the engine is equipped with fan, air intake system, exhaust system, and alternator with engine speed at 1,800 rpm. Advertised power is tested per the specified standard in effect at time of manufacture.
    Note (2) ¹Cat diesel engines are required to use ULSD (ultra-low sulfur diesel fuel with 15 ppm of sulfur or less) or ULSD blended with the following lower-carbon intensity fuels** up to: 20% biodiesel FAME (fatty acid methyl ester)* or 100% renewable diesel, HVO (hydrotreated vegetable oil) and GTL (gas-to-liquid) fuels. Refer to guidelines for successful application. Please consult your Cat dealer or Caterpillar Machine Fluids Recommendations (SEBU6250) for details. *Engines with no aftertreatment devices can use higher blends, up to 100% biodiesel (for use of blends higher than 20% biodiesel, consult your Cat dealer).** Tailpipe greenhouse gas emissions from lower-carbon intensity fuels are essentially the same as traditional fuels.
  • Drive
    Spec Value
    Maximum Travel Speed 3 mile/h
    Maximum Drawbar Pull 55303 lbf
  • Hydraulic System
    Spec Value
    Main System - Maximum Flow 124 gal/min
    Maximum Pressure - Equipment 5076 psi
    Maximum Pressure - Equipment - Lift Mode 5511 psi
    Maximum Pressure - Travel 5076 psi
    Maximum Pressure - Swing 4351 psi
  • Swing Mechanism
    Spec Value
    Swing Speed 11 r/min
    Maximum Swing Torque 72281 lb/ft
  • Weights
    Spec Value
    General Forestry 66140 lb
    Log Loader (U/U) 69640 lb
  • Service Refill Capacities
    Spec Value
    Fuel Tank 262 gal (US)
    Cooling System 5 gal (US)
    Engine Oil 7 gal (US)
    Swing Drive 3 gal (US)
    Final Drive - Each 1 gal (US)
    Hydraulic System - Including Tank 69 gal (US)
    Hydraulic Tank 38 gal (US)
    DEF Tank 11 gal (US)
  • Dimensions
    Spec Value
    Note (1) General Forestry
    Shipping Height - Tilted Cab 134 in
    Handrail Height 131 in
    Length: General Forestry - Boom Stretched Out 469 in
    Length: Log Loader - Boom Stretched Out 595 in
    Tail Swing Radius 124 in
    Counterweight Clearance 52 in
    Ground Clearance 31 in
    Track Length 185 in
    Track Length to Center of Rollers 158 in
    Track Gauge 110 in
    Transport Width 138 in
  • Working Ranges
    Spec Value
    Max Reach at Stick Nose at Ground Level - General Forestry Road Builder 388 in
    Max Reach at Grapple Mount on Heel at Ground Level - Log Loader Under/Under 421 in
  • Air Conditioning System
    Spec Value
    Note (1) The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 2.1 (22" Riser CAB)/2.2 (48"/72" Riser CAB) kg of refrigerant, which as a CO2 equivalent of 3.003/3.146 metric tonnes.

Standard Equipment


  • ROPS Forestry cab with polycarbonate windows
  • 4-point harness seat belt
  • Heated and cooled seat with air-adjustable suspension
  • Integrated joysticks
  • Tilt-up left-side console (side-entry cab only)
  • High-resolution touchscreen monitor
  • Bluetooth integrated radio (including USB, aux port and microphone)
  • 12V DC outlets
  • Keyless push-to-start engine control
  • Automatic bi-level air conditioner
  • LED dome and floor lights
  • Windshield wiper and washer
  • Behind seat storage
  • Retractable sunshade


  • VisionLink
  • Remote Services Capability


  • Maintenance-free 1000 CCA batteries (x4)
  • Centralized electrical disconnect switch
  • LED chassis, boom, and cab lights
  • 115-amp alternator
  • 24-volt electric starting
  • Pre-start monitoring system
  • Tool control software
  • Secondary engine shut off switch


  • Electric fuel priming pump
  • Three selectable modes: Power, Smart, Eco
  • Automatic engine speed control
  • Automatic engine idle shutdown
  • Up to 4600m (15,092 ft) altitude capability
  • 48° C (118° F) high-ambient cooling capacity
  • -32° C (-25° F) cold start capability
  • Hydraulic reverse fan
  • Two-stage fuel filter system
  • Double element air filter with integrated pre-cleaner


  • Boom and stick regeneration circuits
  • Boom and stick drift reduction valve
  • Electronic main control valve
  • Automatic hydraulic oil warm up
  • Automatic swing parking brake
  • High performance hydraulic return filter
  • Automatic two speed travel
  • Bio hydraulic oil capability
  • High torque swing drive
  • Swing cushion valve
  • Tool control software


  • Caterpillar One Key security system
  • Lockable service doors
  • Lockable external tool/storage box
  • Lockable fuel cap and hydraulic tank
  • Lockable disconnect switch
  • Right-hand rail and hand hold
  • Service platforms with anti-skid plate and countersunk bolts
  • Signaling/warning horn
  • Travel alarm
  • Swing alarm
  • Ground-level secondary engine shutoff switch
  • Reaview camera
  • Right-hand sideview camera


  • Integrated vehicle health management system
  • Side-entry service platform
  • Grouped location for engine oil and fuel filters
  • Ground level dipstick for engine oil
  • Scheduled Oil Sampling (S·O·S) ports


  • High Wide undercarriage
  • 203 mm (8") pitch Cat grease lubricated track chain with PPR3 positive pin retention
  • Catwalks
  • Tie down points
  • Counterweight fuel tank
  • Heavy-duty track rollers and frames
  • Heavy-duty travel motor guards
  • Heavy-duty bottom guards
  • Track guiding guards
  • High drawbar final drives
  • Heavy-duty recoil springs
  • Heavy-duty hydraulic swivel
  • Heavy-duty hydraulic swivel guard

Optional Equipment


  • 5.7 m (18'7") Reach boom - General Forestry
  • 5.9 m (19'6") Straight boom - Log Loader
  • 2.9 m (9'6") Thumb-ready stick
  • 3.7 m (12'2") Drop Nose stick
  • 3.5 m (11'6") under/under stick
  • 3.8 m (12'6") over/under stick
  • 3.8 m (12'6") power clam stick
  • B1 family bucket linkage


  • Rear entry
  • Side entry
  • 165 mm (6.5") fixed riser
  • 1219 mm (48") tilting riser
  • CB radio mounts
  • Cat Stick Steer
  • Auxiliary relay


  • Premium lighting - General Forestry - 6 additional LED lights
  • Premium lighting - Log Loader - 10 additional LED lights


  • Cold start package with block heaters and ether assist


  • Medium pressure circuit


  • Easy lock cab tilting system
  • Cab riser light
  • Inspection lighting
  • Swing alarm
  • Right-hand sideview camera
  • Inspection lighting


  • 900 mm (36") triple grouser Tri Link shoes
  • 800 mm (31") triple grouser shoes
  • 700 mm (28") double grouser shoes
  • 600 mm (24") double and single grouser shoes