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Caterpillar Feller Buncher

10 models in this series

The Caterpillar Feller Buncher series from Caterpillar comprises 10 models. Rated output ranges from 250.4 to 309.2 hp.

Caterpillar track feller bunchers 511 to 573 – tracked machines for clear-cutting: the 500 logic, 5x1 and 5x2 for undercarriage and levelling, C7 and C9 ACERT, with Weiler since 2019, 129 to 210 kW

Caterpillar's tracked feller bunchers are the machines of North American clear-cut logging: a saw head with accumulating arms cuts the trees at the stump, holds them in a bunch and lays them down for skidding – on the pine plantations of the South at hundreds of stems per hour. The type logic of the 500 series from LaGrange, Georgia: the hundreds digit 5 stands for the forestry machines, the tens digit orders the size class in ascending order – 511 and 521 the light, 532 to 553 the medium, 563 and 573 the heavy machines with levelling of the upper structure for slopes – and the final digit distinguishes undercarriage and equipment variants. The engines are Cat C7 and C9 ACERT six-cylinders of 8.8 litres, as also power the 320-class excavators. In 2019 Caterpillar sold the purpose-built forestry machines to Weiler of Knoxville, Iowa, which continues the range as Weiler feller bunchers through the Cat dealers.

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The register lists 10 versions with 129 to 210.3 kW from engines of 8,802 cm³ at rated speeds of 1,800 to 2,200 rpm, lengths from 7,614 to 9,424 mm and widths from 2,743 to 3,328 mm.

The tracked feller buncher differs from the wheeled feller in undercarriage and upper structure: it slews 360 degrees, works on slopes where wheeled machines are not permitted and carries saw heads with over 60 cm cutting diameter – the machine for heavy timber and steep terrain.

On used machines, operating hours, the condition of saw head, accumulating arms and saw unit, slew ring and levelling, undercarriage under forestry load and leak-free hydraulics count; parts run through Cat dealers and Weiler.

Sources: SpecCodex register, model data: Caterpillar Fällbündler, Weiler Forestry (Rechtsnachfolger der Caterpillar-Fällbündler seit 2019)

Models compared

10 of 10 models.

	511	521	522	532	541	551	552	553	563	573
Power	170 kW	196.1 kW	196.1 kW	196.1 kW	210.3 kW	210.3 kW	210.3 kW	129 kW	147.1 kW	168 kW
Rated speed	2,100 rpm	2,100 rpm	2,100 rpm	2,100 rpm	2,100 rpm	2,100 rpm	2,100 rpm	2,200 rpm	1,800 rpm	2,200 rpm
Displacement	8,801.5 cm³	8,801.5 cm³	8,801.5 cm³	8,801.5 cm³	8,801.5 cm³	8,801.5 cm³	8,801.5 cm³	–	–	–
Fuel tank capacity	530.3 l	530.3 l	530.3 l	530.3 l	1,181 l	1,181 l	1,181 l	273.3 l	273.3 l	273.3 l
Length	8,458.2 mm	8,638 mm	8,638 mm	8,613.6 mm	9,424.4 mm	9,424.4 mm	9,424.4 mm	7,613.9 mm	7,681 mm	7,681 mm
Width	3,200.4 mm	3,200.4 mm	3,200.4 mm	3,200.4 mm	3,328.4 mm	3,328.4 mm	3,328.4 mm	2,743.2 mm	2,923 mm	2,923 mm

Caterpillar Feller Buncher

Caterpillar track feller bunchers 511 to 573 – tracked machines for clear-cutting: the 500 logic, 5x1 and 5x2 for undercarriage and levelling, C7 and C9 ACERT, with Weiler since 2019, 129 to 210 kW

Models compared

Models

Forwarder in 3D section

511

521

522

532

541

551

552

553

563

573