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
- 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
- Gross Power
- 74.3 HP
- Engine Model
- Cat C3.3B DIT (turbo)
- Net Power - ISO 9249
- 73.7 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.
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 hydr
- 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 hydr
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 hydr
- 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°
Cab
- ROPS
- ISO 3471:2008
- FOPS
- ISO 3449:2005 Level I
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
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 spe
- 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.
