Caterpillar 279D3 Track Loader Specifications

The Caterpillar 279D3 compact track loader is powered by 203.1 cu.in (3.3L) Cat C3.3B DIT 4-cylinder turbocharged diesel engine with a rated power of 72.9 hp (54.4 kW). The Caterpillar 279D3 is equipped with a 2-speed transmission, radial-lift loader boom, and steel embedded rubber tracks. The hydraulic system has standard or HF XPS pump with fluid flow rate of 23 gpm (86 lpm) or 32 gpm (121 lpm). The hydraulic pressure is 3335 psi (230 bar) or 4060 psi (280 bar). The track loader has a rated operating capacity of 2220 lbs (1010 kg) and tipping load of 6340 lbs (2890 kg). The lift height is 124.9" (3175 mm) to hinge pin, and dump height is 97.8" (2485 mm).

Engine Specs

Engine Model .................... Caterpillar C3.3B DIT
Engine Type .................... 4-cycle liquid cooled diesel
Number of Cylinders .................... 4, in-line
Displacement, cu.in (L) .................... 203.1 (3.30)
Cylinder Bore, in (mm) .................... 3.70 (94.0)
Piston Stroke, in (mm) .................... 4.72 (120.0)
Aspiration .................... Turbocharged
Rated Engine Power, hp (kW) .................... 72.9 (54.4)
Maximum Engine Power, hp (kW) .................... 74.3 (55.4)
Rated Engine Speed, rpm .................... 2400
Compression Ratio .................... 17:1
Firing Order .................... 1-3-4-2
Fuel System .................... Direct Injection
Air Cleaner .................... Dual element, radial seal
Emission Level .................... Tier 4 Interim
Fuel Tank Capacity, gal (L) .................... 27.7 (105.0)
Oil Capacity, qts (L) .................... 11.8 (11.0)
Coolant Capacity, qts (L) .................... 14.8 (14.0)
Electrical System Rating, Volts .................... 12
Charging System .................... Alternator
Alternator Rating, Amps .................... 80

Drive Train

Drive System Type .................... Hydrostatic direct drive
Number of Gears .................... 2 (low-high)
Pump Type .................... Axial-piston
Brakes Type .................... Hydraulic wet disc
Forward Speed (Low), mph (kph) .................... 4.5 (7.2)
Forward Speed (High), mph (kph) .................... 8.3 (13.3)
Reverse Speed (Low), mph (kph) .................... 4.5 (7.2)
Reverse Speed (High), mph (kph) .................... 8.3 (13.3)

Undercarriage

Tracks Type .................... Steel embedded rubber track
Track Width (Std), in (mm) .................... 15.7 (400)
Track Width (Opt), in (mm) .................... 17.7 (450)
Ground Pressure (Std Track), psi (Bar) .................... 5.0 (0.345)
Ground Pressure (Opt Track), psi (Bar) .................... 4.4 (0.303)
Ground Contact Area (Std Track), in2 (m2) .................... 2055 (1.34)
Ground Contact Area (Opt Track), in2 (m2) .................... 2272 (1.47)
Undercarriage Suspension .................... Two heavy-duty torsion axles

Hydraulic System

Hydraulic System Type .................... Load-sensing
Hydraulic Pump Type .................... Variable displacement, axial piston
Pump Flow (Standard), gpm (Lpm) .................... 23.0 (86.0)
Pump Flow (High Flow XPS), gpm (Lpm) .................... 32.0 (121.0)
System Pressure (Standard), Bar (psi) .................... 230 (3335)
System Pressure (High Flow XPS), Bar (psi) .................... 280 (4060)
Hydraulic Tank Capacity, gal (L) .................... 10.3 (39.0)
Hydraulic System Capacity, gal (L) .................... 13.7 (52.0)
Number of Valves .................... 3

Loader Performance

Rated Operating Capacity (35% tipping load), lbs (kg) .................... 2220 (1010)
Rated Operating Capacity (50% tipping load), lbs (kg) .................... 3170 (1445)
Tipping Load, lbs (kg) .................... 6340 (2890)
Bucket Breakout Force, lbs (kg) .................... 7285 (3304)
Loader Boom Type .................... Radial-lift

Dimensions and Weight

Length (Track On Ground), in (mm) .................... 64.2 (1630)
Length (w/o Bucket), in (mm) .................... 117.9 (2995)
Length (Bucket On Ground), in (mm) .................... 146.2 (3715)
Length of Undercarriage, in (mm) .................... 83.8 (2130)
Height (Operator Cab), in (mm) .................... 83.2 (2115)
Height (Boom Raised), in (mm) .................... 159.5 (4050)
Width (15.7" Track, w/o Bucket), in (mm) .................... 76 (1930)
Width (17.7" Track, w/o Bucket), in (mm) .................... 78 (1980)
Height to Hinge Pin (Fully Raised), in (mm) .................... 124.9 (3175)
Height to Hinge Pin (Carry Position), in (mm) .................... 7.9 (200)
Dump Angle At Max Height, deg .................... 32
Dump Height (Fully Raised), in (mm) .................... 97.8 (2485)
Dump Reach At Max Height, in (mm) .................... 22.6 (575)
Rollback Angle At Max Height, deg .................... 84
Departure Angle, deg .................... 39
Bucket Width, in (mm) .................... 80 (2035)
Ground Clearance, in (mm) .................... 8.9 (225)
Turning Radius (w/Bucket), in (mm) .................... 88.8 (2255)
Shipping Weight, lbs (kg) .................... 9175 (4170)
Operating Weight, lbs (kg) .................... 10095 (4580)