- Category: Excavators ➔
- Manufacturer: Caterpillar ➔
- Model: 312B ➔
The Caterpillar 312B is a hydraulic excavator in Caterpillar's 12-ton class, designed for general earthmoving, trenching, utility work, and site preparation. It is typically equipped with a diesel engine, hydraulic boom and stick system, and a standard excavator undercarriage for tracked mobility and stability on uneven ground. The 312B is known for its compact size relative to larger excavators, making it suitable for confined job sites while still providing digging depth, lifting capability, and attachment versatility. Common applications include construction, landscaping, roadwork, and material handling. Availability of configurations may vary by market, year, and serial number.
Boom/Stick Excavator Option 1
| Max Cutting Height | 27.10 ft (8.26 m)
|
| Max Digging Depth | 16.90 ft (5.15 m)
|
| Max Loading Height | 19.30 ft (5.88 m)
|
| Max Reach Along Ground | 25.60 ft (7.80 m)
|
| Max Vertical Wall Digging Depth | 14.60 ft (4.45 m)
|
Boom/Stick Excavator Option 2
| Max Cutting Height | 27.90 ft (8.50 m)
|
| Max Digging Depth | 18.30 ft (5.58 m)
|
| Max Loading Height | 20.00 ft (6.10 m)
|
| Max Reach Along Ground | 26.90 ft (8.20 m)
|
| Max Vertical Wall Digging Depth | 16.40 ft (5.00 m)
|
| Shipping Height of Unit | 9.10 ft (2.77 m)
|
| Shipping Length of Unit | 25.00 ft (7.62 m)
|
Boom/Stick Excavator Option 3
| Max Cutting Height | 28.60 ft (8.72 m)
|
| Max Digging Depth | 19.90 ft (6.07 m)
|
| Max Loading Height | 20.80 ft (6.34 m)
|
| Max Reach Along Ground | 28.30 ft (8.63 m)
|
| Max Vertical Wall Digging Depth | 17.60 ft (5.36 m)
|
| Shipping Height of Unit | 9.10 ft (2.77 m)
|
| Shipping Length of Unit | 25.00 ft (7.62 m)
|
Bucket
| Maximum Bucket Capacity | 1.10 cu yd (0.84 cu m)
|
| Minimum Bucket Capacity | 0.50 cu yd (0.38 cu m)
|
| Reference Bucket Capacity | 0.60 cu yd (0.46 cu m)
|
Dimensions
| Ground Clearance | 1.50 ft (0.46 m)
|
| Height - Top of Cab | 9.10 ft (2.77 m)
|
| Length of Track on Ground | 9.20 ft (2.80 m)
|
| Removal Counterweight Clearance | 3.10 ft (0.94 m)
|
| Tail Swing Radius | 7.00 ft (2.13 m)
|
| Width to Outside of Tracks | 8.20 ft (2.50 m)
|
DRIVE SYSTEM
| Maximum Drawbar Pull | 22,930.00 lbs (10,400.89 kg)
|
| Travel Speed | 3.40 mph (5.47 kph)
|
Engine
| Aspiration | Turbocharged
|
| Bore | 4.10 in (10.41 cm)
|
| Displacement | 259.00 cu in (4,244.26 cu cm)
|
| Engine Model | Cat 3064T Diesel Engine
|
| Flywheel Power | 84.00 hp (62.64 kw)
|
| Gross Power | 91.00 hp (67.86 kw)
|
| ISO 9249 | 84.00 hp (62.64 kw)
|
| Net Power | 84.00 hp (62.64 kw)
|
| Power Measured @ | 1900 rpm
|
| SAE J1349 | 84.00 hp (62.64 kw)
|
| Stroke | 5.20 in (13.21 cm)
|
Hydraulic System
| Boom Cylinder - Bore | 4.30 in (10.92 cm)
|
| Boom Cylinder - Stroke | 40.00 in (101.60 cm)
|
| Bucket Cylinder - Bore | 4.00 in (10.16 cm)
|
| Bucket Cylinder - Stroke | 37.50 in (95.25 cm)
|
| Main Implement System - Maximum Flow (2x) | 32.00 gpm (121.12 lpm)
|
| Maximum Pressure - Implements | 4340 psi
|
| Maximum Pressure - Swing | 3340 psi
|
| Maximum Pressure - Travel | 4980 psi
|
| Stick Cylinder - Bore | 4.80 in (12.19 cm)
|
| Stick Cylinder - Stroke | 47.00 in (119.38 cm)
|
Operating Specifications
| Alternator Supplied Amperage | 50 amps
|
| Cooling System Fluid Capacity | 4.10 gal (15.52 l)
|
| Engine Oil Capacity | 3.50 gal (13.25 l)
|
| Fuel Capacity | 66.10 gal (250.19 l)
|
| Hydraulic Pump Flow Capacity | 63.50 gpm (240.35 lpm)
|
| Hydraulic System Fluid Capacity | 42.80 gal (162.00 l)
|
| Hydraulic System Relief Valve Pressure | 4980 psi
|
| Operating Voltage | 24 volts
|
| Operating Weight | 27,410.00 lbs (12,432.98 kg)
|
| Swing Drive Fluid Capacity | 0.80 gal (3.03 l)
|
Service Refill Capacities
| Cooling System | 4.10 gal (15.52 l)
|
| Engine Oil | 3.40 gal (12.87 l)
|
| Final Drive - Each | 0.70 gal (2.65 l)
|
| Fuel Tank | 66.00 gal (249.81 l)
|
| Hydraulic System - Including Tank | 42.80 gal (162.00 l)
|
| Hydraulic Tank | 25.90 gal (98.03 l)
|
| Swing Drive - Each | 0.80 gal (3.03 l)
|
Swing Mechanism
Undercarriage
| Drawbar Pull | 22,930.00 lbs (10,400.89 kg)
|
| Ground Pressure | 5.7 psi
|
| Max Travel Speed | 3.50 mph (5.63 kph)
|
| Shoe Size | 19.70 in (50.04 cm)
|
| Track Gauge | 6.60 ft (2.01 m)
|
Weights
| Operating Weight | 28,680.00 lbs (13,009.05 kg)
|
