279D3 Compact Track Loader

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Description

Technical Specifications

Benefits and Features

Equipment

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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
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.
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
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.

Quiet and Comfortable

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.

Maximum Performance

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.

Making Your Job Easier

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 Smooth Ride

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.

Optimized Machine Capability

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.

Sustainability

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.

Standard Equipment:

Electrical
- 12 volt Electrical System
- 80 ampere Alternator
- Ignition Key Start/Stop Switch
- Lights: Gauge Backlighting, Two Rear Tail Lights, Two Rear Halogen Working Lights, Two Adjustable Front Halogen Lights, Dome Light
- Backup Alarm
- Heavy Duty Battery, 850 CCA
Operator Environment
- Advanced Display with Rearview Camera: Full Color, 127 mm (5 in) LCD screen; Advanced Multi-operator Security System; On-screen Adjustments for Implement Response, Hystat Response, and Creep Control
- Gauges: Fuel Level, Hour Meter
- Operator Warning System Indicators: Air Filter Restriction, Alternator Output, Armrest Raised/Operator Out of Seat, Engine Coolant Temperature, Engine Oil Pressure, Glow Plug Activation, Hydraulic Filter Restriction, Hydraulic Oil Temperature, Park Brake Engaged, Engine Emission System
- Adjustable Vinyl Seat
- Fold In Ergonomic Contoured Armrest
- Control Interlock System, when operator leaves seat or armrest raised: Hydraulic System Disables, Hydrostatic Transmission Disables, Parking Brake Engages
- ROPS Cab, Open, Tilt Up
- FOPS, Level I
- Top and Rear Windows
- Floor Mat
- Interior Rearview Mirror
- 12 volt Electric Socket
- Horn
- Hand (Dial) Throttle, Electronic
- Adjustable Joystick Controls
- Anti-theft Security System with 6-button Keypad
- Storage Compartment with Netting
Power Train
- Cat C3.3B, Turbo Diesel Engine, Meeting Tier 4 Final and Stage V Emission Standards
- Air Cleaner, Dual Element, Radial Seal
- S·O·SSM Sampling Valve, Hydraulic Oil
- Filters, Cartridge-type, Hydraulic
- Filters, Canister-type, Fuel and Water Separator
- Radiator/Hydraulic Oil Cooler (side-by-side)
- Spring Applied, Hydraulically Released, Wet Multi Disc Parking Brakes
- Hydrostatic Transmission, Two Speed Travel
- Suspension – Independent Torsion Axles (4)
Other
- Engine Enclosure, Lockable
- Extended Life Antifreeze, –37° C (–34° F)
- Machine Tie Down Points (6)
- Support, Lift Arm
- Hydraulic Oil Level Sight Gauge
- Radiator Coolant Level Sight Gauge
- Radiator, Expansion Bottle
- Cat ToughGuard^™ Hose
- Auxiliary, Hydraulics, Continuous Flow
- Heavy Duty, Flat Faced Quick Disconnects with Integrated Pressure Release
- Split D-Ring to Route Work Tool Hoses Along Side of Left Lift Arm
- Electrical Outlet, Beacon
- Belly Pan Cleanout
- Variable Speed Demand Fan
- Product Link^™ PL243, Cellular
Mandatory Equipment
- Hydraulics, Standard or High Flow XPS
- Quick Coupler, Mechanical or Powered
- High Visibility Seat Belt, 50 mm (2 in) or 75 mm (3 in)
- Steel Imbed Rubber Track – 450 mm (17.7 in)
- Dual Flange Front Idler/Single Flange Rear Idler or Triple Flange Front/Rear Idlers
- PERFORMANCE PACKAGES:
  – Performance Package H1: Standard Flow Hydraulics (No Self Level)
  – Performance Package H2: Standard Flow Hydraulics, Dual Direction Electronic Self Level (Raise and Lower), Work Tool Return to Dig, Work Tool Positioner, and Electronic Snubbing (Raise and Lower)
  – Performance Package H3: High Flow XPS, Dual Direction Electronic Self Level (Raise and Lower), Work Tool Return to Dig, Work Tool Positioner, and Electronic Snubbing (Raise and Lower)
- COMFORT PACKAGES:
  – Open ROPS (C0): Static Seat (No Foot Throttle, Headliner, Heater or Door)
  – Open ROPS (C1): Foot Throttle, Headliner, Cup Holder, and choice of Seat (Mechanical Suspension or High Back, Heated, Air Ride Seat) (No Heater or Door)
  – Enclosed ROPS with Heater (C2): Foot Throttle, Headliner, Heater and Defroster, Side Windows, Cup Holder, Radio Ready, choice of Seat (Mechanical Suspension or High Back, Heated, Air Ride Seat) and Door (Glass or Polycarbonate)
  – Enclosed ROPS with A/C (C3): C2 + Air Conditioner