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279D3 Compact Track Loader

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.

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Engine

Gross Power - SAE J1995	74.3 HP
Net Power - SAE 1349	72.9 HP
Displacement	203 in³
Bore	3.7 in
Stroke	4.7 in
Peak Torque - 1,500 rpm - SAE J1995	195 ft·lbf
Net Power	72.9 HP
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
Engine Model	Cat C3.3B DIT (turbo)
Net Power - ISO 9249	73.7 HP

Operating Specifications

Rated Operating Capacities - 35% Tipping Load	2220 lb
Tipping Load	6345 lb
Breakout Force - Tilt Cylinder	7285 lb
Rated Operating Capacities - 50% Tipping Load	3170 lb
Ground Contact Area - With 450 mm/17.7 in Track	2272 in²
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
Ground Pressure - With 450 mm/17.7 in Track	4.4 psi

Weights

Operating Weight	10095 lb
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

Length - Track on Ground	64.2 in
Overall Length - Track	83.8 in
Height - Top of Cab	83.2 in
Ground Clearance	8.9 in
Departure Angle	32°
Maximum Dump Angle	39°
Bucket Pin Height - Carry Position	7.8 in
Turning Radius from Center - Machine Rear	70.7 in
Turning Radius from Center - Coupler	55.5 in
Maximum Overall Height	159.5 in
Maximum Reach - With Arms Parallel to Ground	54 in
Turning Radius from Center - Bucket	88.8 in
Bucket Pin Height - Maximum Lift	124.9 in
Length - With Bucket on Ground	146.2 in
Length - Without Bucket	117.9 in
Reach - Maximum Lift/Dump	22.6 in
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
Vehicle Width (450 mm/17.7 in tracks)	78 in
Rack Back Angle - Maximum Height	84°

Hydraulic System

Hydraulic Flow - Standard - Loader Hydraulic Pressure	3335 psi
Hydraulic Flow - High Flow XPS - Maximum Loader Hydraulic Flow	32 gal/min
Hydraulic Flow - Standard - Loader Hydraulic Flow	23 psi
Hydraulic Flow - Standard - Hydraulic Power (Calculated)	44 HP
Hydraulic Flow - High Flow XPS - Maximum Loader Hydraulic Pressure	4061 HP
Hydraulic Flow - High Flow XPS - Hydraulic Power (Calculated)	76 HP

Cab

ROPS	ISO 3471:2008
FOPS	ISO 3449:2005 Level I

Power Train

Travel Speed - Forward or Reverse - Two Speed	8.3 mile/h
Travel Speed - Forward or Reverse - One Speed	4.5 mile/h

Service Refill Capacities

Hydraulic System	13.7 gal (US)
Hydraulic Tank	10.3 gal (US)
Fuel Tank	27.7 gal (US)
Engine Crankcase	3 gal (US)
Cooling System	3.7 gal (US)

Air Conditioning System (if equipped)

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

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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