521 Track Feller Buncher

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. Four models are available with just the right horsepower, track size and hydraulic configurations to fit your application needs.







Units:  US 

Gross Power

284 hp

211.8 kW

Engine Model



Rated Power

263 hp

196.1 kW


537 in3

8.8 L

Operating Specifications

Max Reach w/ Head

26.5 ft

8.1 m

Maximum Drawbar Pull

66400 lb

30118.5 kg

Ground Clearance

33 in

838 mm

Service Refill Capacities

Hydraulic System

79.3 gal

300 L

Fuel Tank

140 gal

530 L

Cooling System

16.1 gal

61 L

Engine Oil

10.3 gal

39 L

Hydraulic Tank

69.2 gal

262 L

Swing Drive

2.6 gal

10 L


Undercarriage (size/pitch)

D6H HD/203.2 mm (8 in)

D6H HD/203.2 mm (8 in)

Track Length

189 in

4801 mm

Track Gauge

2591 mm to 2870 mm (102 in to 113 in)

2591 mm to 2870 mm (102 in to 113 in)

Number of Rollers

9 per side

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