Caterpillar 521 Feller Buncher

Boom

Bare Pin Lift at Max Reach 15,653 lbs (7,100 kg)

Dimensions

Ground Clearance 3 in (7 cm)
Height 12 ft (4 m)
Height – Top of Cab 12 ft (4 m)
Max Reach 27 ft (8 m)
Overall Length 28 ft (9 m)
Overall Width 11 ft (3 m)
Shipping Length – With Attachment 431 in (1,095 cm)
Shipping Length – Without Attachment 340 in (864 cm)
Width – Minimum 126 in (320 cm)

Dimensions – Track Harvester Configuration

Height – Without Attachment 140 in (356 cm)
Shipping Length – Without Attachment 453 in (1,151 cm)
Width – Minimum – Without Attachment 126 in (320 cm)

Engine

Displacement 537 cu in (8,802 cu cm)
Engine Model Cat C9 ACERT
Gross Power 284 hp (212 kw)
Net Power 263 hp (196 kw)
Power Measured @ 2100 rpm
Rated Power 263 hp (196 kw)

Hydraulic System

Pump Size – Boom, Implements 12 cu in (190 cu cm)
Pump Size – Saw Motor 3 cu in (56 cu cm)
Pump Size – Travel Circuit 12 cu in (200 cu cm)

Operating Specifications

Alternator Supplied Amperage 95 amps
Bare Pin Lift at Maximum Reach – Without Attachment 7100 kg (15600 lb) @ 6.1 m (20 ft)
Bare Pin Lift at Maximum Reach – Without Attachment – Track Harvester Configuration 4100 kg (9100 lb) @ 9 m (29.5 ft)
Cooling System Fluid Capacity 16 gal (61 l)
Engine Oil Capacity 10 gal (39 l)
Fuel Capacity 140 gal (530 l)
Hydraulic System Fluid Capacity 79 gal (300 l)
Maximum Reach – With Attachment 27 ft (8 m)
Maximum Reach – With Attachment – Track Harvester Configuration 32 ft (10 m)
Operating Voltage 24 volts
Operating Weight w/o Attachment 59,710 lbs (27,084 kg)

Service Refill Capacities

Cooling System 16 gal (61 l)
Engine Oil 10 gal (39 l)
Fuel Tank 140 gal (530 l)
Hydraulic System 79 gal (300 l)
Hydraulic Tank 69 gal (262 l)
Pony Fuel Tank – Optional 90 gal (341 l)
Swing Drive 3 gal (10 l)

Track

Ground Clearance 33 in (84 cm)
Track Gauge 102 in (259 cm)
Track Length 189 in (480 cm)
Tractive Effort 70,500 lbs (31,978 kg)
Undercarriage Pitch 8 in (20 cm)
Undercarriage Size D6H HD

Undercarriage

Shoe Size 24 in (61 cm)
Track Gauge 16 ft (5 m)
Track Pitch 8 in (20 cm)
Tractive Effort 70,500 lbs (31,978 kg)

Weights

Operating Weight – Without Attachment 59,710 lbs (27,084 kg)
Operating Weight – Without Attachment – Track Harvester Configuration 57,440 lbs (26,054 kg)
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