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Caterpillar 312D/312D L Hydraulic Excavator

Achieve high productivity and lower operating costs with the Cat® 312D Hydraulic Excavator. Unmatched versatility, improved controllability, easy operation and a comfortable, redesigned operator station help make the 312D an industry-leading performer.

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Overview &
Specifications

Features
& Benefits

Standard
Equipment

Optional
Equipment

Work Tools &
Attachments

Engine

Engine Model	Cat® C4.2 ACERT™

Flywheel Power	90 hp / 67 kW

Gross Power	97 hp / 72 kW

SAE J1349	90 hp / 67 kW

Bore	4 in / 102 mm

Stroke	5.1 in / 130 mm

Displacement	259 in3 / 4.25 L

Net Power (SAE J1349)	90 hp / 67 kW

Weights

Operating Weight	28480 lb / 12920 kg

Operating Weight - Standard Undercarriage	28480 lb / 12920 kg

Operating Weight - Long Undercarriage	29650 lb / 13450 kg

Drive

Maximum Drawbar Pull	25600 lb / 114 kN

Travel Speed	3.4 mph / 5.5 km/h

Swing Mechanism

Swing Torque	22830 lb ft / 30950 kN·m

Swing Speed	12.4 RPM / 12.4 RPM

Hydraulic System

Main Implement System - Maximum Flow (2x)	33.5 gal/min / 127 L/min

Maximum Pressure - Implements	4424 psi / 30500 kPa

Maximum Pressure - Travel	3340 psi / 35000 kPa

Maximum Pressure - Swing	3336 psi / 23000 kPa

Pilot System - Maximum Flow	9.5 gal/min / 36 L/min

Pilot System - Maximum Pressure	598 psi / 4120 kPa

Blade System - Maximum Pressure	2990 psi / 20600 kPa

Boom Cylinder - Bore	4.3 in / 110 mm

Boom Cylinder - Stroke	40 in / 1015 mm

Stick Cylinder - Bore	4.7 in / 120 mm

Stick Cylinder - Stroke	47.1 in / 1197 mm

Bucket Cylinder - Bore	3.9 in / 100 mm

Bucket Cylinder - Stroke	37 in / 939 mm

Service Refill Capacities

Fuel Tank	66 gal / 250 L

Cooling System	4.7 gal / 17.9 L

Engine Oil	4.6 gal / 17.5 L

Swing Drive (each)	.79 gal / 3 L

Final Drive (Each)	.79 gal / 3 L

Hydraulic System (Including Tank)	27.5 gal / 104 L

Hydraulic Tank	23.9 gal / 90.7 L