Caterpillar 551 Track Feller Buncher

A robust, reliable undercarriage utilizes proven components, customized for the most rugged forestry conditions. The unique boom design provides industry leading lift capacity throughout full reach range, a benefit in large timber. Three models are available with just the right horsepower, track size and hydraulic configurations to fit your application needs.
Engine
Gross Power 305 hp / 227.4 kW
Engine Model Cat® C9 ACERT™
Rated Power 282 hp / 210.3 kW
Displacement 537 in3 / 8.8 L

Operating Specifications
Max Reach w/ Attachment 28.2 ft / 8.6 m
Max Reach w/ Attachment (track harvester configuration) 37 ft / 11.3 m
Maximum Drawbar Pull 101540 lb / 46058 kg
Bare Pin Lift at Max Reach w/o Attachment 9400 kg (21,800 lb) @ 6.6 m (21.5 ft)
Bare Pin Lift at Max Reach w/o Attachment (track harvester configuration) 5000 kg (11,000 lb) @ 10.7 m (35 ft)
Bare Pin Lift at Max Reach (w/o attachment - long felling linkage) 7400 kg (16,300 lb) @ 8.2 m (27 ft)

Weights
Operating Weight w/o Attachment 68468 lb / 31057 kg
Operating Weight w/o Attachment (track harvester configuration) 69175 lb / 31377 kg
Operating Weight w/o Attachment (track harvester configuration - long felling linkage) 79339 lb / 35988 kg

Hydraulic System
Pump Size - Travel Circuit 110 gal/min / 416.4 L/min
Pump Size - Boom, Implements 110 gal/min / 416.4 L/min
Pump Size - Saw Motor 30 gal/min / 113.6 L/min

Track
Undercarriage Size 345 HEX
Undercarriage Pitch 8.5 in / 215.9 mm
Track Gauge 2591-2870 mm (102-113 in)
Track Length 193 in / 4903 mm
Ground Clearance 35 in / 889 mm
Number of Rollers 9 per side
Tractive Effort 104000 lb / 47174 kg

Service Refill Capacities
Fuel Tank 312 gal / 1181 L
Cooling System 16.1 gal / 61 L
Engine Oil 10.3 gal / 39 L
Hydraulic Tank 85.3 gal / 323 L
Hydraulic System 97.7 gal / 370 L
Swing Drive 2.64 gal / 10 L

Dimensions
Shipping length with attachment 461 in / 11709 mm
Shipping length w/o attachment 371 in / 9423 mm
Height 144 in / 3658 mm
Width 1 131 in / 3327 mm
Width 2 142 in / 3607 mm

Dimensions - Track Harvester Configuration
Shipping length w/o attachment 536 in / 13614 mm
Height w/o attachment 144 in / 3658 mm
Width 1 w/o attachment 131 in / 3327 mm
Width 2 w/o attachment 142 in / 3607 mm