Machine models

Cat forestry machine specifications

Choose a forestry task before comparing engine power

The 527 track skidder illustrates why the forestry list separates extraction equipment from harvesting and loading machines. Caterpillar offers it as a cable machine or with a swing-boom grapple. That distinction determines how the timber is gathered; a horsepower ranking cannot tell you whether the required winch or grapple is installed.

Its skidder torque converter is also distinguished from a bulldozer converter in the original specification. Caterpillar describes the skidder arrangement as transmitting torque to the tracks for pulling, while the dozer comparison concerns varying blade loads. A front blade on a forestry machine does not make its entire powertrain equivalent to a construction dozer.

The 527 undercarriage places extended track support beneath the rear winch or grapple load. Cable and grapple configurations have different track-roller arrangements and equipped weights. The appropriate transport figure therefore needs the actual rear equipment, cab and shoes; the base name alone does not identify the complete load.

Original Cat 527 AEHQ6116-00: powertrain/undercarriagep3 and cable/grapple specification conditions

The grapple opening and grapple capacity answer different questions

The same 527 brochure separates sorting and bunching grapples. Their opening dimensions and rated enclosed areas appear in different rows. An opening that admits a stem is not a statement of lifting capacity, and the grapple area is not a log's weight.

Auto-Grab hydraulics maintain gripping pressure as the load shifts. That feature concerns retention by the grapple; it does not turn the timber bundle into a certified suspended-lift rating. Compare the complete attachment configuration and the intended extraction method before choosing among the skidder references below.

Original Cat 527 AEHQ6116-00: Auto-Grabp5 and sorting/bunching grapple schedulep9

Every Cat forestry machine model with a full listing.

Short answer

14 Cat forestry machine models have a page here, 2 feller bunchers, 1 forwarder, 2 harvesters, 2 log loaders, and 7 skidders. The Cat forestry machine list runs from the 563 to the 525C Grapple, at 90 to 282 hp, in 39 listed versions.

The Cat forestry machine models covered

14 Cat forestry machine models have a page here, covering 39 listed versions between them.

The Cat forestry machine range by model and configuration

2 feller buncher pages: engine power from 197.2 hp on the 563 to 282 hp on the 541 Feller Buncher. 1 forwarder page: engine power from 111.4 hp on the 554 to 154.3 hp on the 574. 2 harvester pages: engine power from 154 hp on the 550 to 282 hp on the 541 Harvester, and the heaviest single listing is the 550 at 34,017 lb. 2 log loader pages: engine power from 143 hp on the 320C FM to 268 hp on the 330D FM. 7 skidder pages: engine power from 90 hp on the D4H to 219 hp on the 545C Grapple, and the heaviest single listing is the 527 at 39,044 lb. Half of the 39 Cat forestry machine models sit between 154 and 263 hp. The three most powerful are the 552 Harvester at 282 hp, 551 Harvester at 282 hp, and 541 Harvester at 282 hp. 11 of the 14 pages cover more than one version, and the 511 to 552 Feller Buncher has the most, at 7.

Feller buncher models

Cat feller buncher models with a page here, ordered by engine power
Model	Engine power	Listed weight	Versions
Cat 563 and 573	197.2 hp and 225.3 hp	See page	2
Cat 511 to 552 Feller Buncher	228 hp, 263 hp, 263 hp, 263 hp, 282 hp, 282 hp, and 282 hp	See page	7

Cat forestry machine: Forwarder models

Cat forwarder models with a page here, ordered by engine power
Model	Engine power	Listed weight	Versions
Cat 554 to 574	111.4 hp and 154.3 hp	See page	2

Harvester models

Cat harvester models with a page here, ordered by engine power
Model	Engine power	Listed weight	Versions
Cat 550	154 hp	34,017 lb	1
Cat 511 to 552 Harvester	228 hp, 263 hp, 263 hp, 263 hp, 282 hp, 282 hp, and 282 hp	See page	7

Log loader models

Cat log loader models with a page here, ordered by engine power
Model	Engine power	Listed weight	Versions
Cat 320C FM and 320D FM	143 hp and 157 hp	See page	2
Cat 324D FM, 325D FM, and 330D FM	188 hp, 204 hp, and 268 hp	See page	3

Skidder models

Cat skidder models with a page here, ordered by engine power
Model	Engine power	Listed weight	Versions
Cat D4H	90 hp	27,293 lb	1
Cat 508 Cable and 508 Grapple	95 hp and 95 hp	See page	2
Cat 518 Cable, 518 Grapple, and 528	130 hp, 130 hp, and 174.4 hp	See page	3
Cat 515 and 525	140 hp and 160 hp	See page	2
Cat 527	150 hp	39,044 lb	1
Cat 525B, 535B, and 545	160 hp, 180 hp, and 200 hp	See page	3
Cat 525C Grapple, 535C Grapple, and 545C Grapple	182 hp, 204 hp, and 219 hp	See page	3

Figure 1The 14 Cat forestry machine models with a page here, counted by kind of machine. A page that covers two or more closely matched models is counted once.

What the Cat forestry machine list holds

14 pages, ordered by power. 563 and 573 (197.2 hp and 225.3 hp); 511 to 552 Feller Buncher (228 hp, 263 hp, 263 hp, 263 hp, 282 hp, 282 hp, and 282 hp); 554 to 574 (111.4 hp and 154.3 hp); 550 (154 hp, 34,017 lb); 511 to 552 Harvester (228 hp, 263 hp, 263 hp, 263 hp, 282 hp, 282 hp, and 282 hp); 320C FM and 320D FM (143 hp and 157 hp); 324D FM, 325D FM, and 330D FM (188 hp, 204 hp, and 268 hp); D4H (90 hp, 27,293 lb); 508 Cable and 508 Grapple (95 hp and 95 hp); 518 Cable, 518 Grapple, and 528 (130 hp, 130 hp, and 174.4 hp); 515 and 525 (140 hp and 160 hp); 527 (150 hp, 39,044 lb); 525B, 535B, and 545 (160 hp, 180 hp, and 200 hp); 525C Grapple, 535C Grapple, and 545C Grapple (182 hp, 204 hp, and 219 hp). By kind: 2 feller bunchers at 197 to 282 hp and 27,276 to 78,661 lb; 1 forwarder at 111 to 154 hp and 28,500 to 38,000 lb; 2 harvesters at 154 to 282 hp and 34,017 to 79,367 lb; 2 log loaders at 143 to 268 hp and 66,800 to 100,974 lb; 7 skidders at 90 to 219 hp and 17,130 to 42,325 lb. The engines that recur are C9 ACERT (14), C7 Acert (5), 3126 DITA (2), 3126 DITA Diesel (2), and 3304 DIT (2).

Other Cat equipment directories

New to the figures? Start with the specifications section and the machine classes.

Sources for this page
Evidence class	Document, classification and recorded date
Manufacturer	Manufacturer Caterpillar U.S. product specifications: Caterpillar Inc.. As of 2026-09-24, rechecked annual.
Reference site	Reference site RitchieSpecs model listings: RitchieSpecs. As of 2026-09-24, rechecked annual.

Cat forestry machine questions

Which Cat forestry machine models are covered here?
Equipment inventory	14 models in 5 kinds of machine: 2 feller bunchers, 1 forwarder, 2 harvesters, 2 log loaders, and 7 skidders.
Named starting references	The list starts with 563, 511 Feller Buncher, and 554.

Recorded multi-configuration example
Comparison example	The 563 and 573 page is one example, setting 2 listed versions side by side.
Directory guides recorded	14

Recorded directory source observation
Reference pages	14
Observation date	2026-09-24
First named reference	563
Last named reference	525C Grapple

Historical listing-coverage record
Recorded field-count cutoff	20
Short listings recorded	159
Examples named in the record	SE60 V XW Vibratory Screed, SE60 V Asphalt Screed, and SE50 V Vibratory Screed

Historical edition comparison
Configurations recorded	39
Recorded engine-power range	Lower 90 hp Upper 282 hp

Recorded power-to-weight example
Model	550
Engine hp per 1,000 lb	4.5

Recorded engine-power span
Engine power in this directory	Lower 90 hp Upper 282 hp

Recorded reference date
Observation date	2026-09-24
Configurations in that observation	39

Price coverage of the historical directory
Guides in the stated price-exclusion scope	14

Equipment classes recorded
Count by class	2 feller bunchers, 1 forwarder, 2 harvesters, 2 log loaders, and 7 skidders

Power band for the recorded comparison
Engine-power range	Lower 90 hp Upper 282 hp

Recorded configuration coverage
Configurations	39
Reference pages	14