Menu

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.

Compare Models
Engine
expand / collapse icon
Gross Power 303.0 HP 226.0 kW

Power Train

See more

Hydraulic Packages

See more

Operator Station

See more

Undercarriage

See more

Boom and Stick

See more

Sustainability

See more

Serviceability

See more

Customer Support

See more

521B Standard Equipment

ELECTRICAL
expand / collapse icon
  • 24 volt electrical system
  • Two 12 volt maintenance free batteries with 950 CCA
  • 95 Amp alternator
  • IQAN programmable controls
  • MD3 monitor display screen

521B Optional Equipment

LINKAGES
expand / collapse icon
  • Harvester Long
  • Omission - Linkage