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 1
Caterpillar 312B Excavator Boom/Stick 1 specifications
Boom/Stick 1
boom w/ stick 2100mm
Max Cutting Height
27.01 ft (8.23 m)
Max Digging Depth
16.84 ft (5.13 m)
Max Loading Height
19.23 ft (5.86 m)
Max Reach Along Ground
25.56 ft (7.79 m)
Max Vertical Wall Digging Depth
14.54 ft (4.43 m)
Boom/Stick 2
Caterpillar 312B Excavator Boom/Stick 2 specifications
Boom/Stick 2
Boom 14\'1\" (4300mm) / Stick 8\'2\" (2500mm)
Max Cutting Height
27.81 ft (8.48 m)
Max Digging Depth
18.21 ft (5.55 m)
Max Loading Height
20.00 ft (6.10 m)
Max Reach Along Ground
26.83 ft (8.18 m)
Max Vertical Wall Digging Depth
16.31 ft (4.97 m)
Shipping Height Of Unit
9.06 ft (2.76 m)
Shipping Length Of Unit
24.92 ft (7.60 m)
Boom/Stick 3
Caterpillar 312B Excavator Boom/Stick 3 specifications
Boom/Stick 3
Boom 14\'1\" (4300mm) / Stick 9\'10\" (3000mm)
Max Cutting Height
28.53 ft (8.70 m)
Max Digging Depth
19.85 ft (6.05 m)
Max Loading Height
20.77 ft (6.33 m)
Max Reach Along Ground
28.30 ft (8.63 m)
Max Vertical Wall Digging Depth
17.54 ft (5.35 m)
Shipping Height Of Unit
9.06 ft (2.76 m)
Shipping Length Of Unit
24.97 ft (7.61 m)
Buckets
Caterpillar 312B Excavator Buckets specifications
Maximum Bucket Capacity
1.1 cu yd
Minimum Bucket Capacity
0.5 cu yd
Reference Bucket Capacity
0.6 cu yd
Dimensions
Caterpillar 312B Excavator Dimensions specifications
Ground Clearance
1.45 ft (0.44 m)
Height
9.08 ft (2.77 m)
Height To Top Of Cab
9.06 ft (2.76 m)
Length
24.92 ft (7.59 m)
Length Of Track On Ground
9.13 ft (2.78 m)
Removal Counterweight Clearance
3.02 ft (0.92 m)
Tail Swing Radius
6.99 ft (2.13 m)
Weight
28,665.00 lbs (13,002.24 kg)
Width
8.17 ft (2.49 m)
Width To Outside Of Tracks
8.17 ft (2.49 m)
Drive
Caterpillar 312B Excavator Drive specifications
Maximum Drawbar Pull
22,930.00 lbs (10,400.89 kg)
Travel Speed
3.40 mph (5.47 kph)
Engine
Caterpillar 312B Excavator Engine specifications
Aspiration
Turbocharged
Bore
4.10 in (10.41 cm)
Displacement
259.00 cu in (4,244.26 cu cm)
Eec 80/1269
84.00 hp (62.64 kw)
Engine Make
2236
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)
Number Of Cylinders
4
Power Measured @
1900 rpm
Sae J1349
84.00 hp (62.64 kw)
Stroke
5.20 in (13.21 cm)
Hydraulic System
Caterpillar 312B Excavator Hydraulic System specifications
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
Pilot System - Maximum Flow
4.80 gpm (18.17 lpm)
Pilot System - Maximum Pressure
570 psi
Stick Cylinder - Bore
4.80 in (12.19 cm)
Stick Cylinder - Stroke
47.00 in (119.38 cm)
Operational
Caterpillar 312B Excavator Operational 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 V
Operating Weight
27,410.00 lbs (12,432.98 kg)
Swing Drive Fluid Capacity
0.80 gal (3.03 l)
Service Refill Capacities
Caterpillar 312B Excavator Service Refill Capacities specifications
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
Caterpillar 312B Excavator Swing Mechanism specifications
Swing Speed
12.3 rpm
Swing Torque
22,422.00 lbs ft (30,399.75 nm)
Undercarriage
Caterpillar 312B Excavator Undercarriage specifications
Drawbar Pull
22,930.00 lbs (10,400.89 kg)
Ground Pressure
5.66 psi
Max Travel Speed
3.42 mph (5.50 kph)
Shoe Size
19.69 in (50.01 cm)
Track Gauge
6.53 ft (1.99 m)
Weights
Caterpillar 312B Excavator Weights specifications
Operating Weight
28,680.00 lbs (13,009.05 kg)
