The Cat® 279D3 Compact Track Loader, with its radial lift design, delivers impressive mid-lift reach and excellent digging performance with outstanding drawbar power. Its standard, suspended undercarriage system provides superior traction, flotation, stability and speed to work in a wide range of applications and underfoot conditions.
Engine | |
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Gross Power - SAE J1995 | 74.3 hp / 55.4 kW |
Net Power - SAE 1349 | 72.9 hp / 54.4 kW |
Displacement | 203 in³ / 3.3 l |
Bore | 3.7 in / 94 mm |
Stroke | 4.7 in / 120 mm |
Peak Torque - 1,500 rpm - SAE J1995 | 195 ft·lbf / 265 N·m |
Net Power | 72.9 hp / 54.4 kW |
Note | Net power advertised is the power available at the flywheel when the engine is equipped with alternator, air cleaner, muffler/aftertreatment and cooling fan. |
Gross Power | 74.3 hp / 55.4 kW |
Engine Model | Cat C3.3B DIT (turbo) |
Net Power - ISO 9249 | 73.7 hp / 54.9 kW |
Operating Specifications | |
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Rated Operating Capacities - 35% Tipping Load | 2220 lb / 1010 kg |
Tipping Load | 6345 lb / 2885 kg |
Breakout Force - Tilt Cylinder | 7285 lb / 3304 kg |
Rated Operating Capacities - 50% Tipping Load | 3170 lb / 1445 kg |
Ground Contact Area - With 450 mm/17.7 in Track | 2272 in² / 1.47 m² |
Note | Operating Weight, Operating Specifications and Dimensions all based on 75 kg (165 lb) operator, all fluids, two speed, OROPS, 2036 mm (80 in) low profile bucket, 450 mm (17.7 in) tracks, dual flange front idler/single flange rear idler, standard flow hydraulics, mechanical suspension seat, no optional counterweights and manual quick coupler (unless otherwise noted). |
Rated Operating Capacity with Optional Counterweight | 3390 lb / 1540 kg |
Ground Pressure - With 450 mm/17.7 in Track | 4.4 psi / 30.4 kPa |
Weights | |
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Operating Weight | 10095 lb / 4579 kg |
Note | Operating Weight, Operating Specifications and Dimensions all based on 75 kg (165 lb) operator, all fluids, two speed, OROPS, 2036 mm (80 in) low profile bucket, 450 mm (17.7 in) tracks, dual flange front idler/single flange rear idler, standard flow hydraulics, mechanical suspension seat, no optional counterweights and manual quick coupler (unless otherwise noted). |
Dimensions | |
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Length - Track on Ground | 64.2 in / 1630 mm |
Overall Length - Track | 83.8 in / 2129 mm |
Height - Top of Cab | 83.2 in / 2113 mm |
Ground Clearance | 8.9 in / 226 mm |
Departure Angle | 32° |
Maximum Dump Angle | 39° |
Bucket Pin Height - Carry Position | 7.8 in / 198 mm |
Turning Radius from Center - Machine Rear | 70.7 in / 1796 mm |
Turning Radius from Center - Coupler | 55.5 in / 1410 mm |
Maximum Overall Height | 159.5 in / 4051 mm |
Maximum Reach - With Arms Parallel to Ground | 54 in / 1373 mm |
Turning Radius from Center - Bucket | 88.8 in / 2256 mm |
Bucket Pin Height - Maximum Lift | 124.9 in / 3173 mm |
Length - With Bucket on Ground | 146.2 in / 3714 mm |
Length - Without Bucket | 117.9 in / 2995 mm |
Reach - Maximum Lift/Dump | 22.6 in / 575 mm |
Note | Operating Weight, Operating Specifications and Dimensions all based on 75 kg (165 lb) operator, all fluids, two speed, OROPS, 2036 mm (80 in) low profile bucket, 450 mm (17.7 in) tracks, dual flange front idler/single flange rear idler, standard flow hydraulics, mechanical suspension seat, no optional counterweights and manual quick coupler (unless otherwise noted). |
Clearance at Maximum Lift and Dump | 97.8 in / 2485 mm |
Vehicle Width (450 mm/17.7 in tracks) | 78 in / 1981 mm |
Rack Back Angle - Maximum Height | 84° |
Hydraulic System | |
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Hydraulic Flow - Standard - Loader Hydraulic Pressure | 3335 psi / 23000 kPa |
Hydraulic Flow - High Flow XPS - Maximum Loader Hydraulic Flow | 32 gal/min / 121 l/min |
Hydraulic Flow - Standard - Loader Hydraulic Flow | 23 psi / 86 kPa |
Hydraulic Flow - Standard - Hydraulic Power (Calculated) | 44 hp / 33 kW |
Hydraulic Flow - High Flow XPS - Maximum Loader Hydraulic Pressure | 4061 hp / 28000 kW |
Hydraulic Flow - High Flow XPS - Hydraulic Power (Calculated) | 76 hp / 57 kPa |
Cab | |
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ROPS | ISO 3471:2008 |
FOPS | ISO 3449:2005 Level I |
Power Train | |
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Travel Speed - Forward or Reverse - Two Speed | 8.3 mile/h / 13.3 km/h |
Travel Speed - Forward or Reverse - One Speed | 4.5 mile/h / 7.2 km/h |
Service Refill Capacities | |
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Hydraulic System | 13.7 gal (US) / 52 l |
Hydraulic Tank | 10.3 gal (US) / 39 l |
Fuel Tank | 27.7 gal (US) / 105 l |
Engine Crankcase | 3 gal (US) / 11 l |
Cooling System | 3.7 gal (US) / 14 l |
Air Conditioning System (if equipped) | |
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Air Conditioning | The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 1.0 kg of refrigerant which has a CO2 equivalent of 1.430 metric tonnes. |
Noise Level | |
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Note (2) | **The declared dynamic operator sound pressure levels per ISO 6396:2008. The measurements were conducted with the cab doors and windows closed and at 70% of the maximum engine cooling fan speed. The sound level may vary at different engine cooling fan speeds. |
Outside Cab*** | 103 dB(A) |
Note (3) | ***The labeled sound power level for the CE marked configurations when measured according to the test procedure and conditions specified in 2000/14/EC. |
Inside Cab** | 83 dB(A) |
Note (1) | Cab and Rollover Protective Structures (ROPS) are standard in North America and Europe. |
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