521B TRACK HARVESTER
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 Cat 521B 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. 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.
SPECIFICATIONS
Gross Power226.0 kW
Max Reach w/ Head9.9 m
Operating Weight w/o Head26966.0 kg
BENEFITS AND FEATURES
power train
Built for power, reliability, low maintenance, fuel efficiency and low emissions.
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hydraulic packages
Powerful hydraulic system combined with a powerful boom and stick maximize productivity.
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engine
Gross Power226.0 kW
operating specifications
Max Reach w/ Head9.9 m
weights
Operating Weight w/o Head26966.0 kg
undercarriage
Pitch215.9 mm
Size330 EX (D7)
hydraulic system
PumpsDedicated variable displacement pump for travel circuit - 200 cc
PumpsDedicated variable displacement pump for boom and implement functions - 200 cc
PumpsElectric hydraulic oil fill pump
service refill capacities
Cooling System41.0 L
Engine Oil39.0 L
Hydraulic System448.0 L
Swing Drive10.0 L
Fuel Capacity856.0 L
track gauge
521B2591.0 mm
standards
CabCab meets FOPS/OPS/ROPS/WCB/OR-OSHA requirements
power train
Displacement8.8 L
Engine ModelCat® C9 ACERT™
Gross Power226.0 kW
Gross Power @ 1,800 rpm226.0 kW
Rated Power @ 2,100 rpm210.3 kW
boom system
Track Harvester Configuration - Lift over front of tracks: Bare Pin Lift @ Maximum Reach (without head)4000 kg @ 9.8 m (8,800 lb @ 32 ft 5 in)
Track Harvester Configuration - Lift over front of tracks: Maximum Reach (with head)9.9 m
ground clearance
Ground Clearance889.0 mm
track length
Track Length4855.0 mm
operating weights without heads standard counterweight
Track Harvester Configuration - 521B26966.0 kg
tractive effort
521B31978.0 kg
BENEFITS AND FEATURES
POWER TRAIN
Built for power, reliability, low maintenance, fuel efficiency and low emissions.
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HYDRAULIC PACKAGES
Powerful hydraulic system combined with a powerful boom and stick maximize productivity.
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521B STANDARD EQUIPMENT
- electrical
24 volt electrical system
Two 12 volt maintenance free batteries with 950 CCA
95 Amp alternator
IQAN programmable controls
MD3 monitor 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/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 - power train
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 - undercarriage
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
Welded, non-leveling carbody - hydraulics
Dedicated fixed displacement pilot pump
Dedicated variable displacement pumps for track and implement functions
325 EX swing drive and swing motor
Electric hydraulic oil fill pump
265 L (70 gal) hydraulic tank - antifreeze
50% concentration extended life coolant - other standard equipment
Heavy duty hood enclosure
Flexxaire fan
Vandalism protection
Spare hose storage area
Grease gun bracket and storage area
856 L (226 gal) fuel tank
521B OPTIONS
- linkages
Harvester Long
Omission - Linkage - hydraulics
Harvester - track systems
610 mm (24 in) SG pads, clipped corners, with mud/snow reliefs
711 mm (28 in) SG pads, clipped corners, with mud/snow reliefs
711 mm (28 in) DG pads, clipped corners, with mud/snow reliefs
914 mm (36 in) Tri-track, clipped corners, with mud/snow reliefs
Star Carrier Rollers
Standard Carrier Rollers - other equipment
Lighting Gp-HID, replaces certain standard lights
Heavy Counterweight
Starting Aid, Cold Weather - includes two additional batteries
Starting Aid, Arctic - includes engine and hydraulic oil Arctic heater - field installed attachments
Skylight, peaked, removable
MOTEUR
Built for power, reliability, low maintenance, fuel efficiency and low emissions.
BENEFITS AND FEATURES
Powerful Performance The Cat C9 electronically controlled ACERT engine delivers power while meeting all current U.S. EPA emission standards. All models contain a fuel/water separator, engine air intake heater and a dual-stage combination air cleaner with precleaner.
High Capacity Cooling System The side-by-side radiator/oil cooler gives excellent cooling capacity for high production bunching and harvesting. On-demand Flexxaire fan activates only when required and allows the cooling fan to purge debris from the radiator area, keeping a cleaner cooling system. The IQAN control system automatically adjusts the Flexxaire fan blade angle, reducing horsepower demand and lowering fuel consumption. The purge cycle frequency and duration can be set by operator in the cab to suit varying application conditions.
Engine Oil Cat engine oil is formulated to optimize engine life and performance and is recommended for use in Cat diesel engines. Extended oil change intervals reduce maintenance and machine downtime.
Service The clamshell style engine compartment provides easy access to all filters, oil dipstick, coolant reservoir, hydraulic fill pump, valves and hoses reducing maintenance time.
Low Exhaust Emissions The Cat C9 ACERT engine is a low emission engine designed to meet U.S. EPA emission regulations.
Batteries An optional starting aid for colder climates is available for 521B machine models. This option provides two (2) additional batteries and HD battery cables.
Powerful hydraulic system combined with a powerful boom and stick maximize productivity.
BENEFITS AND FEATURES
Electric Hydraulic Oil Fill Pump An easy accessible service wand allows hydraulic oil to be pumped through the hydraulic filtering system and into the tank. This reduces maintenance downtime and helps to maintain oil cleanliness requirements.
Variable Displacement Pump 521B track feller bunchers are equipped with variable displacement pumps for travel and implement functions. Hydraulics for dangle harvesting or processor heads are available for all models.
Cat Hydraulic Oil Provides maximum protection against mechanical and corrosive wear in all hydraulic systems. Its high zinc content reduces wear and extends pump life. Biodegradable hydraulic oil (HEES) is also available from your Cat dealer and provides an environmentally-sound alternative to mineral based oils.
ToughGuard™ Hoses Abrasion resistant hoses along the boom and stick provide strength and flexibility. The ToughGuard cover consists of a thin layer of UHMW polyethylene bonded to the rubber cover, providing exceptional abrasion resistance.
Superior comfort and visibility.
BENEFITS AND FEATURES
Operator Comfort The operator station is designed with joysticks and an air ride seat, reducing operator fatigue and providing easy operation. An HVAC system with updated air ducts provides better cooling and heating. A large side window with side screen allows fresh air into the cab, and an isolated mounted cab and engine reduces noise levels and vibration. Ergonomically located pedals with side-by-side foot rests provide operator comfort while operating machine travel.
Visibility The cab design optimizes post structures and window placement to provide excellent operator visibility to front, sides and rear. A large polycarbonate skylight provides excellent upward visibility.
Safety The standard 32 mm (1.25 in) thick “Margard” front window maximizes operator protection. All purpose built forestry cabs meet FOPS/ROPS/OPS/WCB, OR-OSHA requirements. The skylight provides an alternate escape hatch.
Monitor The IQAN MD3 display allows the operator to continuously monitor the operating system of the machine. The monitor has been downsized slightly to improve the operator’s line of sight out the right front corner of the cab. The IQAN control system allows the operator to adjust all control parameters.
Electrical System The B Series track feller bunchers feature dual in-cab 12 volt power points and one 24 volt power point. Power is provided by two 12 volt maintenance free batteries and 95 amp alternator. An optional cold weather starting attachment may be selected to provide two additional batteries and HD starter cables.
Heavy duty forestry undercarriage.
BENEFITS AND FEATURES
Undercarriage The 521B Series machines utilize larger 330 size components providing extended life and reduced O
Travel Motor
BENEFITS AND FEATURES
18550559 Track Guards
18550559 Carbody
18550559 Carrier Rollers
18550572 Boom and Stick
18550572 Boom and Stick
18550568 Sustainability
18550574 Serviceability
18550574 Flexxaire Fan
18550574 Clam-Shell Service Door
18550570 Customer Support
BENEFITS AND FEATURES
Extended Service Intervals