312D/312D L Hydraulic Excavators Engine Engine Model Net Power (SAE J1349) Gross Power ® Cat C4.
Features Comfortable Operator Station Spacious and quiet, this world class cab lets the operator focus on performance and production. Industry-Leading Performance The 312D with a Cat® C4.2 ACERT™ engine and overall system efficiency delivers industry-leading productivity. Maximum Versatility Easily configure a large variety of work tools with the Cat Tool Control System.
Operator Station Enhanced comfort, operation and visibility Experience a spacious, quiet and comfortable operator station. The cab is pressurized to 50 Pa to reduce the amount of dust that enters the cab, keeping the operator comfortable the entire shift, while assuring high productivity during long work days. • The comfortable seat adjusts to suit the operator’s size and weight. Available as an option is the air suspension seat.
Engine Delivering the most work per liter/gallon of fuel consumed The Cat® C4.2 engine with ACERT™ Technology optimizes performance and meets U.S. EPA Tier 3 and EU Stage IIIA regulations. In conjunction with integrated electronics, ACERT Technology reduces emissions during the combustion process by using advanced technology in the air and fuel systems. The Cat C4.2 engine delivers exceptional power, allowing more hydraulic pressure to drive productivity and reduce your cost per ton of material moved.
Hydraulics Low effort and precise control for highly efficient performance Outstanding Performance With two percent more hydraulic pressure for additional lift and breakout forces, the 312D hydraulic system is designed for high efficiency and performance. Auxiliary hydraulic and electrical lines are routed to the boom foot making installation of hydraulic circuits much easier.
Undercarriage and Structures Strong, stable and easy to maneuver Caterpillar uses advanced engineering and software to analyze all structures, creating a durable, reliable machine for the toughest applications. More than 70 percent of the structural welds are robotic and achieve additional penetration over manual welds. These structural components and undercarriage are the backbone of the machine’s durability. Carbody Design X-shaped, box section carbody provides excellent resistance to torsional bending.
Versatility More options for more work Work Tools Caterpillar offers a variety of work tools, including hammers, thumbs, grapples, multi-processors, shears, pulverizers and vibratory compactors to fit your application needs. Additionally, a wide range of buckets are available to optimize machine performance. Auxiliary hydraulic and electrical lines are routed to the boom foot for easier installation of auxiliary hydraulic circuits, therefore reducing time, parts and cost required to add a work tool.
Serviceability Simplified service and maintenance saves time and money Designed with the service technician in mind, many service locations are at ground level so critical maintenance can be done quickly and efficiently. Longer maintenance intervals reduce cost and increase machine availability. • LCD monitor has the capability to memorize working hours for filters, fluids, components and work tools. Working time histories and recommended change intervals can be displayed.
Technology Products Advanced technologies improve productivity and simplify serviceability AccuGrade™ Systems AccuGrade™ Grade Control Systems are easy to use and deliver a wide range of benefits to customers, including: • Increased productivity • Increased job-site safety • Assistance with labor shortages • Improved employee satisfaction and retention • Increased equipment versatility • Integration into Cat® machines AccuGrade Site Reference System Advanced slope and elevation guidance simplifies excavat
Customer Support Unmatched support makes the difference • Make detailed comparisons of the machines you are considering before you buy with estimates of component life, preventive maintenance and the true cost of production. • Customize the machine that is right for you using Build and Quote applications on your dealer’s website or www.cat.com. • Get the latest training literature and trained staff. • Repair option programs guarantee the cost of repairs up front.
312D/312D L Hydraulic Excavator Specifications Engine Hydraulic System ® Engine Model Cat C4.2 ACERT™ Gross Power 72 kW 97 hp Net Power 67 kW 90 hp SAE J1349 67 kW 90 hp Bore 102 mm 4.02 in Stroke 130 mm 5.12 in Displacement 4.25 L 259.3 in3 • Net power advertise is the power available at the flywheel when the engine is equipped with fan, air cleaner, muffler and alternator. • No engine derating required below 2300 m (7,500 ft) altitude. • The 312D meets U.S.
312D/312D L Hydraulic Excavator Specifications Dimensions All dimensions are approximate. 2 3 1 9 10 7 8 1 2 3 4 5 6 7 8 9 10 12 6 Boom Options Stick Options Shipping Height Shipping Length Tail Swing Radius Length to Center of Rollers 312D 312D L Track Length 312D 312D L Ground Clearance Track Gauge 312D 312D L Transport Width 312D 312D L Cab Height Counterweight Clearance 4 5 Reach 2.5 m (8'2") 2830 mm (9'3") 7610 mm (25'0") 2140 mm (7'0") Reach 2.
Operating Weights Caterpillar designed and built track-type undercarriage.
312D/312D L Hydraulic Excavator Specifications Working Ranges ➤ ➤ All dimensions are approximate. 3 ➤ ➤ ➤ 2 7 ➤ 6 ➤ ➤ ➤ 1 5 ➤ ➤➤ ➤ ➤ 4 Boom 1 2 3 4 5 6 7 Stick Bucket Maximum Digging Depth Maximum Reach at Ground Level Maximum Cutting Height Maximum Loading Height Minimum Loading Height Maximum Depth Cut for 2440 mm (8'0") Level Bottom Maximum Vertical Wall Digging Depth Stick Digging Force (SAE) Bucket Digging Force (SAE) Reach 5.68 m (18'7") 2.5 m (8'2")* 0.52 m3 (0.
Buckets Buckets have tapered sides, angled corner teeth, dual radius curvature, horizontal wear strips and holes for optional side cutters. Width mm in 600 24 750 30 905 36 1055 42 1210 48 Recommended Maximum Material Density 2.8 m (9'2") Stick 3.0 m (9'10") Stick kg/m3 lb/yd3 kg/m3 lb/yd3 1800 3,000 1800 3,000 1800 3,000 1800 3,000 1800 3,000 1500 2,500 1500 2,500 1200 2,000 1500 2,500 1200 2,000 Capacity m3 yd3 0.30 0.39 0.40 0.53 0.52 0.68 0.63 0.82 0.74 0.
312D/312D L Hydraulic Excavator Specifications Reach Boom Lift Capacities Load Point Height Load at Maximum Reach R3.0 STICK – 3.0 m (9'10") BUCKET – 0.52 m3 (0.68 yd3) 1.5 m (5.0 ft) Load Radius Over Front Load Radius Over Side UNDERCARRIAGE – Long SHOES – 700 mm (28") triple grouser 3.0 m (10.0 ft) 4.5 m (15.0 ft) 6.0 m (20.0 ft) BOOM – Reach 4.65 m (15.25 ft) BLADE – Down 7.5 m (25.0 ft) m ft 7.5 m 25.0 ft kg lb *1400 *3,100 *1400 *3,100 5.86 18.73 6.0 m 20.
Reach Boom Lift Capacities Load Point Height Load at Maximum Reach R3.0 STICK – 3.0 m (9'10") BUCKET – 0.52 m3 (0.68 yd3) 1.5 m (5.0 ft) Load Radius Over Front Load Radius Over Side UNDERCARRIAGE – Long SHOES – 700 mm (28") triple grouser 3.0 m (10.0 ft) 4.5 m (15.0 ft) 6.0 m (20.0 ft) BOOM – Reach 4.65 m (15.25 ft) BLADE – Up 7.5 m (25.0 ft) m ft 7.5 m 25.0 ft kg lb *1400 *3,100 *1400 *3,100 5.86 18.73 6.0 m 20.0 ft kg lb *2250 *4,450 *2250 *4,450 *1200 *2,650 *1200 *2,650 7.22 23.
312D/312D L Hydraulic Excavator Specifications Reach Boom Lift Capacities Load Point Height Load at Maximum Reach R2.8 STICK – 2.8 m (9'2") BUCKET – 0.52 m3 (0.68 yd3) 1.5 m (5.0 ft) Load Radius Over Front Load Radius Over Side UNDERCARRIAGE – Long SHOES – 700 mm (28") triple grouser 3.0 m (10.0 ft) 4.5 m (15.0 ft) 6.0 m (20.0 ft) BOOM – Reach 4.65 m (15.25 ft) BLADE – Down 7.5 m (25.0 ft) m ft 7.5 m 25.0 ft kg lb *1500 *1500 5.55 6.0 m 20.
Reach Boom Lift Capacities Load Point Height Load at Maximum Reach R2.8 STICK – 2.8 m (9'2") BUCKET – 0.52 m3 (0.68 yd3) 1.5 m (5.0 ft) Load Radius Over Front Load Radius Over Side UNDERCARRIAGE – Long SHOES – 700 mm (28") triple grouser 3.0 m (10.0 ft) 4.5 m (15.0 ft) 6.0 m (20.0 ft) BOOM – Reach 4.65 m (15.25 ft) BLADE – Up 7.5 m (25.0 ft) m ft 7.5 m 25.0 ft kg lb *1500 *1500 5.55 6.0 m 20.0 ft kg lb *2050 *2050 *1300 *2,900 *1300 *2,900 6.99 22.71 4.5 m 15.
312D/312D L Hydraulic Excavator Specifications Reach Boom Lift Capacities Load Point Height Load at Maximum Reach R3.0 STICK – 3.0 m (9'10") BUCKET – 0.52 m3 (0.68 yd3) 1.5 m (5.0 ft) Load Radius Over Front Load Radius Over Side UNDERCARRIAGE – Long SHOES – 700 mm (28") triple grouser 3.0 m (10.0 ft) 4.5 m (15.0 ft) 6.0 m (20.0 ft) BOOM – Reach BLADE – None 7.5 m (25.0 ft) m ft 7.5 m 25.0 ft kg lb *1400 *3,100 *1400 *3,100 5.86 18.73 6.0 m 20.
312D/312D L Standard Equipment Standard equipment may vary. Consult your Caterpillar dealer for details. Alternator, 50 amp • Filter/fluid change information Mirrors (frame and cab) Automatic engine speed control • Level check for hydraulic oil, engine oil and coolant Power Train • Warning messages • Cat® C4.
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312D/312D L Hydraulic Excavator For more complete information on Cat products, dealer services, and industry solutions, visit us on the web at www.cat.com © 2008 Caterpillar Inc. All rights reserved Printed in the U.S.A. AEHQ5949 (02-2008) Replaces AEHQ5551 Materials and specifications are subject to change without notice. Featured machines may include additional equipment. See your Caterpillar dealer for available options. CAT, CATERPILLAR, SAFETY.CAT.
