Caterpillar 311B Specs

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Overview

The Caterpillar 311B is a hydraulic excavator listed in the Heavy Equipment Hub equipment database with structured specifications for comparison, research, and machine selection. Key specification points include engine power of 79 hp, operating weight of 28440 lb, working depth of 15.56 ft, reach of 23.92 ft, capacity of 0.6 yd³ and travel speed of 3.4 mph. This model can be reviewed for excavation, trenching, loading, site preparation, and fleet comparison workflows. Use the full specifications table to compare the Caterpillar 311B against similar hydraulic excavator models by power, weight, capacity, dimensions, speed, and other technical values.

Key Specifications

Operating Weight
28,440
lb

Net Power
95
hp

Gross Power
85
hp

Max Digging Depth
15.56
ft

Full Specifications

70 specs

Dimensions

Boom/Stick Option (Hex) 1 Boom 14\'1\" (4300mm) / Stick 1950mm

Ground Clearance 1.45 ft / 0.44 m

Height to Top of Cab 9.06 ft / 2.76 m

Length of Track on Ground 8.57 ft / 2.61 m

Max Cutting Height 25.14 ft / 7.66 m

Max Digging Depth 15.56 ft / 4.74 m

Max Loading Height 17.39 ft / 5.30 m

Max Reach Along Ground 23.92 ft / 7.29 m

Max Vertical Wall Digging Depth 13.62 ft / 4.15 m

Removal Counterweight Clearance 3 lb / 1 kg

Shipping Height Of Unit 9.06 ft / 2.76 m

Shipping Length Of Unit 23.79 ft / 7.25 m

Tail Swing Radius 6.99 ft / 2.13 m

Width To Outside Of Tracks 8.17 ft / 2.49 m

Engine

Alternator Supplied Amperage 50 A

Bore 4 in / 102 mm

Cooling System Fluid Capacity 4.10 gal / 15.5 L

Displacement 259 cu in / 4.2 L

Eec 80/1269 79

Engine Make 2236

Engine Model 3064T

Engine Oil Capacity 3.50 gal / 13.2 L

Flywheel Power 79 hp / 58.9 kW

Fuel Capacity 66.10 gal / 250.2 L

Fuel Tank 66 gal / 249.8 L

Gross Power 85 hp / 63.4 kW

Hydraulic Pump Flow Capacity 57.10 gal/min / 216.1 L/min

Hydraulic System Fluid Capacity 41.50 gal / 157.1 L

Hydraulic System Relief Valve Pressure 4,980 psi / 343.4 bar

Hydraulic Tank 25.90 gal / 98.0 L

Iso 9249 79

Maximum Bucket Capacity 1.10 yd³ / 0.84 m³

Minimum Bucket Capacity 0.50 yd³ / 0.38 m³

Net Power 79 hp / 58.9 kW

Number of Cylinders 4

Operating Voltage 24 V

Operating Weight 24,527 lb / 11,125 kg

Power Measured @ 1,800 rpm

Reference Bucket Capacity 0.60 yd³ / 0.46 m³

Sae J1349 78

Stroke 5.10 in / 130 mm

Swing Drive Fluid Capacity 0.80 gal / 3.0 L

Swing Speed 10.80 deg

Swing Torque 22,422 deg

Travel Speed 3.40 mph / 5.5 km/h

Hydraulics

Boom Cylinder - Bore 4 in / 102 mm

Boom Cylinder - Stroke 40 in / 1,016 mm

Bucket Cylinder - Bore 4 in / 102 mm

Bucket Cylinder - Stroke 37 in / 940 mm

Engine Oil 3.40 gal / 12.9 L

Main Implement System - Maximum Flow (2x) 28 gal/min / 106.0 L/min

Maximum Pressure - Implements 4,340 psi / 299.2 bar

Maximum Pressure - Swing 3,340 psi / 230.3 bar

Maximum Pressure - Travel 4,980 psi / 343.4 bar

Pilot System - Maximum Flow 4.50 gal/min / 17.0 L/min

Pilot System - Maximum Pressure 570 psi / 39.3 bar

Stick Cylinder - Bore 4.30 in / 109 mm

Stick Cylinder - Stroke 47 in / 1,194 mm

Other

Cooling System 4.10 gal / 15.5 L

Final Drive - Each 0.7

Hydraulic System - Including Tank 41.50 gal / 157.1 L

Maximum Drawbar Pull 20,720 lb / 9,398 kg

Net Power 95 hp / 70.8 kW

Operating Weight 28,440 lb / 12,900 kg

Swing Drive - Each 0.80 deg

Undercarriage

Drawbar Pull 20,720 lb / 9,398 kg

Ground Pressure 6 psi / 0.4 bar

Max Travel Speed 3.42 mph / 5.5 km/h

Shoe Size 19.69 in / 500 mm

Track Gauge 6.53 ft / 1.99 m

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Frequently Asked Questions

What is the operating weight of the Caterpillar 311B? +

The Caterpillar 311B has an operating weight of 24,527 lb (11,125 kg). This places it in a class suited for hydraulic excavator applications where ground pressure and transport weight are key considerations.

How powerful is the Caterpillar 311B engine? +

The Caterpillar 311B produces 85 hp (63.4 kW) of engine power. This output is typical for its weight class and designed to handle demanding Hydraulic Excavator work cycles efficiently.

What is the maximum digging depth of the Caterpillar 311B? +

The Caterpillar 311B has a maximum digging depth of 15.56 ft (4.74 m). This makes it suitable for trenching, foundation work, and other excavation tasks requiring vertical reach.

What is the maximum reach of the Caterpillar 311B? +

The Caterpillar 311B has a maximum reach along the ground of 23.92 ft (7.29 m), allowing it to work effectively across wide areas without repositioning.

What is the travel speed of the Caterpillar 311B? +

The Caterpillar 311B has a maximum travel speed of 3.4 mph (5.5 km/h), enabling efficient movement between work areas on the job site.

How does the Caterpillar 311B compare to similar Hydraulic Excavator models? +

You can compare the Caterpillar 311B side by side with any other model using the Heavy Equipment Hub compare tool. Key comparison points include engine power, operating weight, digging depth, hydraulic flow, and overall dimensions.