Skip to content
Caterpillar

521

Feller Buncher

Operating Weight w/o Attachment
59,710 lb
Displacement
537 in³
Gross Power
284.0 hp
All feller bunchers
Caterpillar 521 Feller Buncher
1 / 5
Image 1 of 5
Image: h-cpc.cat.com

Specifications

58 data points

Operating Specifications

Operating Specifications specifications
Operating Weight w/o Attachment59,710 lb
Operating Weight57,431 lb
Fuel Capacity140.1 gal
Operating Voltage24 V
Alternator Supplied Amperage95 A
Hydraulic System Fluid Capacity79.3 gal
Cooling System Fluid Capacity16.2 gal
Engine Oil Capacity10.4 gal
Bare Pin Lift at Maximum Reach - Without Attachment7100 kg (15600 lb) @ 6.1 m (20 ft)
Bare Pin Lift at Maximum Reach - Without Attachment - Track Harvester Configuration4100 kg (9100 lb) @ 9 m (29.5 ft)
Maximum Reach - With Attachment319 in
Maximum Reach - With Attachment - Track Harvester Configuration384 in

Engine

Engine specifications
Engine ModelCat C9 ACERT
Displacement537 in³
Power Measured @2,100 rpm
Gross Power284.0 hp
Net Power263.0 hp
Rated Power263.0 hp

Weights

Weights specifications
Operating Weight - Without Attachment59,710 lb
Operating Weight - Without Attachment - Track Harvester Configuration57,440 lb

Hydraulic System

Hydraulic System specifications
Pump Size - Boom, Implements12 in³
Pump Size - Saw Motor3 in³
Pump Size - Travel Circuit12 in³

Dimensions

Dimensions specifications
Ground Clearance3 in
Height - Top of Cab141 in
Overall Length341 in
Overall Width126 in
Height141 in
Shipping Length - non tilt454 in
Max Reach319 in
Shipping Length - With Attachment431 in
Shipping Length - Without Attachment340 in
Width - Minimum126 in

Undercarriage

Undercarriage specifications
Track Gauge190 in
Shoe Size24 in
Track Pitch8 in
Ground Clearance33 in
Tractive Effort70,499 lb
Track Length190 in

Boom

Boom specifications
Lift Capacity at Max Reach9,039 lb
Bare Pin Lift at Max Reach15,653 lb
Max Reach w/ Head386 in

Service Refill Capacities

Service Refill Capacities specifications
Fuel Tank140.0 gal
Cooling System16.1 gal
Engine Oil10.3 gal
Hydraulic Tank69.2 gal
Swing Drive2.6 gal
Hydraulic System79.3 gal
Pony Fuel Tank - Optional90.0 gal

Track

Track specifications
Ground Clearance33 in
Track Length189 in
Tractive Effort70,500 lb
Undercarriage Pitch8 in
Undercarriage SizeD6H HD
Track Gauge102 in

Dimensions - Track Harvester Configuration

Dimensions - Track Harvester Configuration specifications
Height - Without Attachment140 in
Shipping Length - Without Attachment453 in
Width - Minimum - Without Attachment126 in

Comparable machines

Other feller bunchers in a similar weight class.