Caterpillar 311B

Boom/Stick Excavator Option 1

Max Cutting Height25.20 ft (8 m)
Max Digging Depth15.60 ft (5 m)
Max Loading Height17.40 ft (5 m)
Max Reach Along Ground24 ft (7 m)
Max Vertical Wall Digging Depth13.70 ft (4 m)

Boom/Stick Excavator Option 2

Max Cutting Height25.60 ft (8 m)
Max Digging Depth16.60 ft (5 m)
Max Loading Height17.90 ft (5 m)
Max Reach Along Ground24.90 ft (8 m)
Max Vertical Wall Digging Depth14.60 ft (4 m)
Shipping Height of Unit9.10 ft (3 m)
Shipping Length of Unit23.80 ft (7 m)

Boom/Stick Excavator Option 3

Max Cutting Height26.70 ft (8 m)
Max Digging Depth18.40 ft (6 m)
Max Loading Height19 ft (6 m)
Max Reach Along Ground26.60 ft (8 m)
Max Vertical Wall Digging Depth16.30 ft (5 m)
Shipping Height of Unit9.10 ft (3 m)
Shipping Length of Unit23.90 ft (7 m)


Maximum Bucket Capacity1.10 cu yds (1 m)
Minimum Bucket Capacity0.50 cu yds (0 m)
Reference Bucket Capacity0.60 cu yds (0 m)


Ground Clearance1.50 ft (0 m)
Height - Top of Cab9.10 ft (3 m)
Length of Track on Ground8.60 ft (3 m)
Removal Counterweight Clearance3.10 ft (1 m)
Tail Swing Radius7 ft (2 m)
Width to Outside of Tracks8.20 ft (3 m)


Maximum Drawbar Pull20,720 lbs (9,399 kg)
Travel Speed3.40 mph (5 kph)


Bore4 in (10 cm)
Displacement259 cu in (0 m)
Engine ModelCat 3064T
Flywheel Power79 hp (59 kw)
Gross Power85 hp (63 kw)
ISO 924979 hp (59 kw)
Net Power79 hp (59 kw)
Power Measured @1,800 rpm
SAE J134978 hp (58 kw)
Stroke5.10 in (13 cm)

Hydraulic System

4.54.50 gal/min (17 l/min)
570570 psi
Boom Cylinder - Bore4 in (10 cm)
Boom Cylinder - Stroke40 in (102 cm)
Bucket Cylinder - Bore4 in (10 cm)
Bucket Cylinder - Stroke37 in (94 cm)
Main Implement System - Maximum Flow (2x)28
Maximum Pressure - Implements4,340 psi
Maximum Pressure - Swing3,340 psi
Maximum Pressure - Travel4,980 psi
Stick Cylinder - Bore4.30 in (11 cm)
Stick Cylinder - Stroke47 in (119 cm)

Operating Specifications

Alternator Supplied Amperage50 A
Cooling System Fluid Capacity4.10 gal (16 l)
Engine Oil Capacity3.50 gal (13 l)
Fuel Capacity66.10 gal (250 l)
Hydraulic Pump Flow Capacity57.10 gal/min (216 l/min)
Hydraulic System Fluid Capacity41.50 gal (157 l)
Hydraulic System Relief Valve Pressure4,980 psi
Operating Voltage24 V
Operating Weight24,526.50 lbs (11,125 kg)
Swing Drive Fluid Capacity0.80 gal (3 l)

Service Refill Capacities

Cooling System4.10 gal (16 l)
Engine Oil3.40 gal (13 l)
Final Drive - Each0.70 gal (3 l)
Fuel Tank66 gal (250 l)
Hydraulic System - Including Tank41.50 gal (157 l)
Hydraulic Tank25.90 gal (98 l)
Swing Drive - Each0.80 gal (3 l)

Swing Mechanism

Swing Speed10.80 rpm


Drawbar Pull20,720 lbs (9,399 kg)
Ground Pressure5.60 psi
Max Travel Speed3.50 mph (6 kph)
Shoe Size19.70 in (50 cm)
Track Gauge6.60 ft (2 m)


Operating Weight27,680 lbs (12,556 kg)

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