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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 522B 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. The 522B model is a leveling machine for more comfort on steep terrain. 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


Gross Power
303 HP

Operating Specifications

Maximum Reach - With Head
32.5 ft


Operating Weight - Without Head
70532 lb

Service Refill Capacities

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


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

Hydraulic System

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

Track Length

Track Length
191.1 in

Power Train

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


8.5 in
330 EX (D7)

Ground Clearance

Ground Clearance
35 in