521B Track Felller Buncher

Product Description

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
Us
Metric
Engine
Gross Power
303.0 hp
226.0 kW
Operating Specifications
Max Reach w/ Attachment
26.5 ft
8.1 m
Weights
Operating Weight w/o Attachment
60629.0 lb
27501.0 kg
Hydraulic System
Pumps
Electric hydraulic oil fill pump
Pumps
Dedicated variable displacement pump for travel circuit - 200 cc
Pumps
Dedicated variable displacement pump for boom and implement functions - 200 cc
Pumps
Dedicated variable displacement pump for saw motor - 55 cc
Service Refill Capacities
Cooling System
10.8 gal
41.0 L
Engine Oil
10.3 gal
39.0 L
Hydraulic System
118.0 gal
448.0 L
Swing Drive
2.6 gal
10.0 L
Fuel Capacity
226.0 gal
856.0 L
Tractive Effort
521B
70500.0 lb
31978.0 kg
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)
Track Feller Buncher - Lift over front of tracks: Maximum Reach (with head)
26.5 ft
8.1 m
Power Train
Displacement
537.0 in3
8.8 L
Engine Model
Cat® C9 ACERT™
Gross Power
303.0 hp
226.0 kW
Gross Power @ 1,800 rpm
303.0 hp
226.0 kW
Rated Power @ 2,100 rpm
282.0 hp
210.3 kW
Track Length
Track Length
191.1 in
4855.0 mm
Ground Clearance
Ground Clearance
35.0 in
889.0 mm
Track Gauge
521B
102.0 in
2591.0 mm
Standards
Cab
Cab meets FOPS/OPS/ROPS/WCB/OR-OSHA requirements
Operating Weights (without heads, standard counterweight)
Track Feller Buncher - 521B
60629.0 lb
27501.0 kg
Undercarriage
Pitch
8.5 in
215.9 mm
Size
330 EX (D7)
Standard/Optional

Standard Equipment

ELECTRICAL
GUARDS
OPERATOR ENVIRONMENT
POWER TRAIN
UNDERCARRIAGE
HYDRAULICS
ANTIFREEZE
OTHER STANDARD EQUIPMENT

Optional Equipment

LINKAGES
HYDRAULICS
FELLING HEADS
TRACK SYSTEMS
OTHER EQUIPMENT
FIELD INSTALLED ATTACHMENTS

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