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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 Attachment
26.5 ft


Operating Weight - Without Attachment
71711 lb

Service Refill Capacities

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


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

Boom System

Track Feller Buncher - Lift Over Front of Tracks: Bare Pin Lift at 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

Hydraulic System

Pumps (3)
Dedicated variable displacement pump for boom and implement functions - 200 cc
Pumps (1)
Electric hydraulic oil fill pump
Pumps (4)
Dedicated variable displacement pump for saw motor - 55 cc
Pumps (2)
Dedicated variable displacement pump for travel circuit - 200 cc

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


330 EX (D7)
8.5 in

Ground Clearance

Ground Clearance
35 in

Track Length

Track Length
191.1 in