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The new B Series track feller bunchers feature smoother hydraulic performance, increased engine HP, a more comfortable operator station and better right side operator visibility. The 522B Series are zero tail swing machines designed for medium to high production clear cut and or select cut on rough terrain. These machines perform in a variety of small through larger tree size applications. The 522B model is a leveling machine for more comfort on steep terrain. A robust undercarriage utilizes proven components, customized for demanding forestry conditions. The unique boom design provides industry leading lift capacity throughout full reach range, a benefit in large timber.


Gross Power 303.0 hp 226.0 kW Less

Operating Specifications

Max Reach w/ Attachment 26.5 ft 8.1 m Less

Hydraulic System

Pumps Electric hydraulic oil fill pump Electric hydraulic oil fill pump Less
Pumps Dedicated variable displacement pump for travel circuit - 200 cc Dedicated variable displacement pump for travel circuit - 200 cc Less
Pumps Dedicated variable displacement pump for boom and implement functions - 200 cc Dedicated variable displacement pump for boom and implement functions - 200 cc Less
Pumps Dedicated variable displacement pump for saw motor - 55 cc Dedicated variable displacement pump for saw motor - 55 cc Less

Service Refill Capacities

Cooling System 10.8 gal 41.0 L Less
Engine Oil 10.3 gal 39.0 L Less
Hydraulic System 118.0 gal 448.0 L Less
Swing Drive 2.6 gal 10.0 L Less
Fuel Capacity 226.0 gal 856.0 L Less


Operating Weight w/o Attachment 71711.0 lb 32528.0 kg Less

Power Train

Displacement 537.0 in3 8.8 L Less
Engine Model Cat® C9 ACERT™ Cat® C9 ACERT™ Less
Gross Power 303.0 hp 226.0 kW Less
Gross Power @ 1,800 rpm 303.0 hp 226.0 kW Less
Rated Power @ 2,100 rpm 282.0 hp 210.3 kW Less

Boom System

Track Feller Buncher - Lift over front of tracks: Bare Pin Lift @ Maximum Reach (without head) 6100 kg @ 6.2 m (13,500 lb @ 20 ft 6 in) 6100 kg @ 6.2 m (13,500 lb @ 20 ft 6 in) Less
Track Feller Buncher - Lift over front of tracks: Maximum Reach (with head) 26.5 ft 8.1 m Less


Pitch 8.5 in 215.9 mm Less
Size 330 EX (D7) 330 EX (D7) Less


Cab Cab meets FOPS/OPS/ROPS/WCB/OR-OSHA requirements Cab meets FOPS/OPS/ROPS/WCB/OR-OSHA requirements Less

Operating Weights (without heads, standard counterweight)

Track Feller Buncher - 522B 71711.0 lb 32528.0 kg Less

Track Gauge

522B 2591 mm-2870 mm (102 in-113 in) 2591 mm-2870 mm (102 in-113 in) Less

Track Length

Track Length 191.1 in 4855.0 mm Less

Ground Clearance

Ground Clearance 35.0 in 889.0 mm Less

Tractive Effort

522B 75500.0 lb 34246.0 kg Less
522B Optional High Drawbar 85000.0 lb 38555.0 kg Less

Power Train

Built for power, reliability, low maintenance, fuel efficiency and low emissions.

Hydraulic Packages

Powerful hydraulic system combined with a powerful boom and stick maximize productivity.

Operator Station

Superior comfort and visibility.

Leveling System

Stability and comfort in steep slope conditions.


Heavy duty forestry undercarriage.

Boom and Stick

Maximum reach and lift capacity.


Work tool attachments to meet your needs.


Maximum efficiency and productivity while conserving natural resources.


Easy servicing and extended service intervals.

Customer Support

Count on your Cat dealer.

522B Standard Equipment

  • 24 volt electrical system
  • Two 12 volt maintenance free batteries with 950 CCA
  • 95 Amp alternator
  • IQAN programmable controls
  • MD3 monitor display screen

  • Hydraulically actuated hinged engine enclosure with warning alarm
  • Engine fan guard
  • Bottom guards
  • Isolation mounted cab and engine
  • Heavy duty radiator guard door

  • OPS/FOPS/ROPS/WCB/OR-OSHA certified cab
  • Dual joystick control
  • Reverse slope windshield
  • Air ride seat
  • Skylight - alternate escape hatch
  • Top escape hatch
  • 76.2 mm (3 in) retractable seat belt
  • DIN mount radio ready with speakers
  • Operator sound suppression to standards
  • Travel alarm
  • Cup holders (2)
  • Two 12 volt and one 24 volt power outlets
  • Front window, 32 mm (1.25 in) thick Margard
  • Positive filtered ventilation, pressurized cab with bi-level air conditioner, heater and defroster with manual control
  • Left side fresh air window with screen
  • Forced air fan
  • Washable floor mat
  • Neutral lever (lockout) for all controls

  • C9 ACERT engine meets U.S. EPA emission standards
  • Variable travel speed (3 ranges)
  • Under hood primary air filter
  • 43° C (109° F) degree ambient temperature cooling package: - Aluminum core ATAAC and side-by-side radiator and oil cooler - Removable debris screen - Swing out A/C condenser
  • Electric fuel priming pump
  • Fuel water separator

  • Track roller guards with access holes
  • Hydraulic track adjusters
  • Double flange track rollers
  • GFT80 Lohmann final drives
  • Cat 330 size undercarriage components
  • Nine (9) track rollers and two (2) carrier rollers per side
  • Bolted, variable gauge leveling carbody with three cylinder tilt mechanism

  • Dedicated fixed displacement pilot pump
  • Dedicated variable displacement pumps for track and implement functions
  • Variable displacement saw pump for feller buncher hydraulics only
  • 325 EX swing drive and swing motor
  • Electric hydraulic oil fill pump
  • High flow hydraulic arrangement for felling heads with two cylinder arm design 180 L/min (48 gal/min)
  • Low flow hydraulic arrangement for felling heads with single cylinder and link design 120 L/min (32 gal/min)
  • 265 L (70 gal) hydraulic tank

  • 50% concentration extended life coolant

  • Heavy duty hood enclosure
  • Flexxaire fan
  • Vandalism protection
  • Spare hose storage area
  • Grease gun bracket and storage area
  • 856 L (226 gal) fuel tank

522B Optional Equipment

  • Intermittent
  • Feller Buncher
  • Omission - Linkage

  • Intermittent
  • Feller Buncher - Low Flow
  • Feller Buncher - High Flow

  • HF201B*
  • *Heads available with Full Tilt 330 degree, or Partial Tilt 40 degree

  • 610 mm (24 in) SG pads, clipped corners, with mud/snow reliefs
  • 711 mm (28 in) SG pads, clipped corners, with mud/snow reliefs
  • Star Carrier Rollers
  • Standard Carrier Rollers

  • Lighting Gp-HID, replaces certain standard lights
  • High Drawbar final drives
  • Heavy Counterweight
  • Starting Aid, Cold Weather - includes two additional batteries
  • Starting Aid, Arctic - includes engine and hydraulic oil Arctic heater

  • Skylight, peaked, removable

Combining equipment, technology and services to help build your success.

Cat Connect makes smart use of technology and services to improve your jobsite efficiency. Using the data from technology-equipped machines, you’ll get more information and insight into your equipment and operations than ever before. Working with your Cat dealer, you can find the right combination of Cat Connect technologies and services for your jobsites. Whether your goal is to maximize production, reduce costs or improve safety, Cat Connect gives you the options you need to build the successful, sustainable business you want.

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