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521 Track Feller Buncher

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. Four models are available with just the right horsepower, track size and hydraulic configurations to fit your application needs.

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SPECIFICATION SUMMARY
  • Gross Power 284.0 hp
  • Engine Model Cat® C9 ACERT™
  • Rated Power 263.0 hp
  • Displacement 537.0 in3

PRICE (USD)
Call 800-637-5000 for rate information

Engine

  • Gross Power
    284.0 hp
  • Engine Model
    Cat® C9 ACERT™
  • Rated Power
    263.0 hp
  • Displacement
    537.0 in3
  • Gross Power
    284 HP
  • Engine Model
    Cat® C9 ACERT™
  • Rated Power
    263 HP
  • Displacement
    537 in³

Hydraulic System

  • Pump Size - Travel Circuit
    12.2 in3
  • Pump Size - Boom, Implements
    11.59 in3
  • Pump Size - Saw Motor
    3.36 in3
  • Pump Size - Travel Circuit
    12.2 in³
  • Pump Size - Boom, Implements
    11.59 in³
  • Pump Size - Saw Motor
    3.36 in³

Track

  • Track Gauge
    102.0 in
  • Track Length
    189.0 in
  • Ground Clearance
    33.0 in
  • Undercarriage Size
    D6H HD
  • Undercarriage Pitch
    8 in
  • Tractive Effort
    70500 lb
  • Track Gauge
    102 in
  • Track Length
    189 in
  • Ground Clearance
    33 in
  • Undercarriage Size
    126 in

Service Refill Capacities

  • Fuel Tank
    140.0 gal
  • Cooling System
    16.1 gal
  • Engine Oil
    10.3 gal
  • Hydraulic Tank
    69.2 gal
  • Hydraulic System
    79.3 gal
  • Swing Drive
    2.6 gal
  • Pony Fuel Tank - Optional
    90 gal (US)
  • Fuel Tank
    140 gal (US)
  • Cooling System
    16.1 gal (US)
  • Engine Oil
    10.3 gal (US)
  • Hydraulic Tank
    69.2 gal (US)
  • Hydraulic System
    79.3 gal (US)
  • Swing Drive
    2.6 gal (US)

Dimensions

  • Height
    140.0 in
  • Shipping Length - With Attachment
    431 in
  • Shipping Length - Without Attachment
    340 in
  • Width - Minimum
    126 in
  • Height
    140 in

Operating Specifications

  • Maximum Reach - With Attachment
    26.6 ft
  • Maximum Reach - With Attachment - Track Harvester Configuration
    32 ft
  • Bare Pin Lift at Maximum Reach - Without Attachment
    7100 kg (15600 lb) @ 6.1 m (20 ft)
  • Bare Pin Lift at Maximum Reach - Without Attachment - Track Harvester Configuration
    4100 kg (9100 lb) @ 9 m (29.5 ft)

Weights

  • Operating Weight - Without Attachment
    59710 lb
  • Operating Weight - Without Attachment - Track Harvester Configuration
    57440 lb

Dimensions - Track Harvester Configuration

  • Shipping Length - Without Attachment
    453 in
  • Height - Without Attachment
    140 in
  • Width - Minimum - Without Attachment
    126 in

Powertrain

Hydraulic Packages

Operator Comfort

Leveling System

Undercarriage

Boom and Stick

Versatility

Owning and Operating Costs

Serviceability

Customer Focus

Standard Equipment:

  • Electrical
    • 24-volt electrical system
    • 2-12 volt maintenance free batteries with 950 CCA
    • 95 Amp alternator
    • IQAN programmable controls
    • MDL large display screen
  • Guards
    • Hydraulically actuated hinged engine enclosure with warning alarm
    • Engine fan guard
    • Bottom guards
    • Isolation mounted cab and engine
    • Heavy duty radiator guard door
  • Operator Environment
    • OPS/FOPS/ROPS cab
    • Dual joystick control
    • Reverse slope windshield
    • Air ride seat
    • Skylight - alternate escape hatch
    • Top escape hatch
    • 3 inch retractable seat belt
    • Heater/air conditioner w/climate control
    • DIN mount radio ready
    • Operator sound suppression to standards
    • Travel alarm
    • Cup holders (2)
    • 2-l2volt and 1-24 volt power outlets
    • Front Window, 1.25 in Thick Margard
  • Powertrain
    • C9 ACERT engine meets Tier 2 emissions requirements
    • Infinitely variable travel speed
    • Under hood centrifugal precleaner and primary air filter
    • 43C degree ambient temperature cooling package
    • Electric fuel priming pump
    • Fuel water separator
  • Undercariage
    • Track roller guards with access holes
    • Hydraulic track adjusters
    • Double flange track rollers
    • GFT80 Lohmann final drives
    • Caterpillar D6H HD grease lubricated and swaged undercarriage components
    • Welded, non-leveling carbody
  • Other Standard Equipment
    • Vandalism protection
    • Spare hose storage area
    • Grease gun bracket and storage area
    • 140 US gallon fuel tank
  • Hydraulics
    • Dedicated pilot pump
    • Two dedicated variable displacement track pump and implement pump
    • 30 gpm dedicated saw pump
    • Cat® 325C swing drive and swing motor
    • Electric hydraulic oil fill pump
    • 70 US gal hydraulic tank
  • Antifreeze
    • 50% concentration extended life coolant

Optional Equipment:

  • Track Systems
    • 24" SG pads, clipped corners, with mud/snow reliefs
    • 24" DG pads, clipped corners, with mud/snow reliefs
    • 28" SG pads, clipped corners, with mud/snow reliefs
    • 28" DG pads, clipped corners, with mud/snow reliefs
    • 36" Tri-track, clipped corners, with mud/snow reliefs
    • Star Carrier Rollers
  • Other Equipment
    • Starting Aid, Cold Weather
    • Starting Aid, Arctic
    • Pony Tank, additional 90 US gal (341 L) fuel capacity
    • Flexxaire™ Fan
  • Field Installed Attachments
    • CD Player with AM/FM Stereo - remote capable
    • Skylight, peaked, removable
    • Loose Linkage Arrangements
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