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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 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.

Cat Specs
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Engine

Gross Power
303 HP

Operating Specifications

Maximum Reach - With Head
32.5 ft

Weights

Operating Weight - Without Head
59450 lb

Service Refill Capacities

Cooling System
10.8 gal (US)
Hydraulic System
118 gal (US)
Swing Drive
2.6 gal (US)
Engine Oil
10.3 gal (US)
Fuel Capacity
226 gal (US)

Standards

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

Power Train

Engine Model
Cat® C9 ACERT™
Rated Power - 2,100 rpm
282 HP
Gross Power
303 HP
Displacement
537 in³
Gross Power - 1,800 rpm
303 HP

Hydraulic System

Pumps (2)
Dedicated variable displacement pump for boom and implement functions - 200 cc
Pumps (3)
Electric hydraulic oil fill pump
Pumps (1)
Dedicated variable displacement pump for travel circuit - 200 cc

Undercarriage

Size
330 EX (D7)
Pitch
8.5 in

Ground Clearance

Ground Clearance
35 in

Track Gauge

521B
102 in

Tractive Effort

521B
70500 lb

Track Length

Track Length
191.1 in