279D3
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.
Gross Power - SAE J1995
74.3 HP
Rated Operating Capacities - 35% Tipping Load
2220 lb
Operating Weight
10095 lb
Specification
Value
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
Specification
Value
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
Specification
Value
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).
Specification
Value
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°
Specification
Value
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
Specification
Value
ROPS
ISO 3471:2008
FOPS
ISO 3449:2005 Level I
Specification
Value
Travel Speed - Forward or Reverse - Two Speed
8.3 mile/h
Travel Speed - Forward or Reverse - One Speed
4.5 mile/h
Specification
Value
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)
Specification
Value
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.
Specification
Value
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.
The industry leading sealed and pressurized cab option provides the operator with a cleaner and quieter operating environment with excellent work tool visibility. Continuing the industry leading trend, the D3 Series also includes as standard, seat mounted adjustable joystick controls for operator comfort.
High performance power train provides maximum performance and production capability through the Electronic Torque Management system, standard two speed travel and an electronic hand/foot throttle with decel pedal capability.
Cat® “Intelligent Leveling” system provides industry leading technology, integration, and available features such as dual direction self level, work tool return to dig, and work tool positioner.
A standard, fully independent torsion axle suspension combined with the optional Speed Sensitive Ride Control system improves operation on rough terrain, enabling better load retention, increased productivity and greater operator comfort.
Maximize machine capability and control with the available Advanced Display, providing on-screen adjustments for implement response, hystat response and creep control. Also features multi-language functionality with customizable layouts, security system and rearview camera.
- The Cat® C3.3B engine meets U.S. EPA Tier 4 Final and EU Stage V emission standards.
- Cat diesel engines are required to use ULSD (ultra-low sulfur diesel fuel with 15 ppm of sulfur or less) or ULSD blended with the following lower-carbon intensity fuels up to: 7% biodiesel FAME (fatty acid methyl ester). Refer to guidelines for successful application. Please consult your Cat dealer or “Caterpillar Machine Fluids Recommendations” (SEBU6250) for details.
- Cat® Extended Life Coolant and long-life HYDO Advanced hydraulic fluids not only reduce downtime but help decrease the amount of fluid and filters that are replaced over the life of the machine.
- Boost productivity with Cat technologies like work tool positioner, return to dig, and Cat Smart Attachments.
- Save fuel and reduce your greenhouse gas emissions with efficiency features such as foot throttle pedal and cooling system demand fan.
