1300 881 064 
FIND A BRANCH
DIGITAL TOOLS
Photos
521B
521B Track Harvester
521B Track Harvester
521B
Track Harvesters
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.
Gross Power
303.0 hp/226.0 kW
Pumps (3)
Electric hydraulic oil fill pump
Pumps (2)
Dedicated variable displacement pump for boom and implement functions - 200 cc
Pumps (1)
Dedicated variable displacement pump for travel circuit - 200 cc
Key Features
Power Train
Hydraulic Packages
Operator Station
Undercarriage
Boom and Stick
Sustainability
Serviceability
Customer Support
Specifications
Metric
|
Imperial
Engine 
Gross Power
303.0 hp
226.0 kW
Hydraulic System
Pumps (3)
Electric hydraulic oil fill pump
Pumps (2)
Dedicated variable displacement pump for boom and implement functions - 200 cc
Pumps (1)
Dedicated variable displacement pump for travel circuit - 200 cc
Operating Specifications
Maximum Reach - With Head
32.5 ft
9.9 m
Service Refill Capacities
Engine Oil
10.3 gal (US)
39.0 l
Swing Drive
2.6 gal (US)
10.0 l
Hydraulic System
118.0 gal (US)
448.0 l
Cooling System
10.8 gal (US)
41.0 l
Fuel Capacity
226.0 gal (US)
856.0 l
Weights
Operating Weight - Without Head
59450.0 lb
26966.0 kg
Standards
Cab
Cab meets FOPS/OPS/ROPS/WCB/OR-OSHA requirements
Undercarriage
Size
330 EX (D7)
Pitch
8.5 in
215.9 mm
Power Train
Displacement
537.0 in³
8.8 l
Rated Power - 2,100 rpm
282.0 hp
210.3 kW
Gross Power - 1,800 rpm
303.0 hp
226.0 kW
Gross Power
303.0 hp
226.0 kW
Engine Model
Cat® C9 ACERT™
Boom System
Track Harvester Configuration - Lift Over Front of Tracks: Maximum Reach - With head
32.5 ft
9.9 m
Track Harvester Configuration - Lift Over Front of Tracks: Bare Pin Lift at Maximum Reach - Without Head
4000 kg @ 9.8 m (8,800 lb @ 32 ft 5 in)
Operating Weights - Without Heads, Standard Counterweight
Track Harvester Configuration - 521B
59450.0 lb
26966.0 kg
Track Gauge
521B
102.0 in
2591.0 mm
Track Length
Track Length
191.1 in
4855.0 mm
Ground Clearance
Ground Clearance
35.0 in
889.0 mm
Tractive Effort
521B
102.0 in
2591.0 mm
Equipment
Standard Equipment
Optional Equipment
