312D2 GCNon-Current
312D2 GC - 2015, Tier 2, Stage II, LACD
Overview
Good machine performance combined with low owning and operating costs make the Cat 312D GC Series 2 hydraulic excavator the preferred machine of choice for utility contractors. Unmatched versatility, improved controllability, easy operation, and a comfortable, redesigned operator station help make the 312D GC Series 2 an industry-leading performer.
Specifications
| Engine Model | 3054C |
| Flywheel Power | — |
| Operating Weight | — |
Benefits & Features
Specifications
| Engine Model | 3054C |
| Flywheel Power | — |
| Bore | — |
| Stroke | — |
| Engine Power - ISO 14396 | — |
| Net Power - SAE J1349/ISO 9249 | — |
| Note | The 312D GC Series 2 meets EU Stage II or IIIB equivalent sound standard. |
| Operating Weight | — |
| Operating Weight - Standard Undercarriage | — |
| Swing Speed | — |
| Maximum Drawbar Pull | — |
| Maximum Travel Speed | — |
| Main System - Maximum Flow - Total | — |
| Boom Cylinder - Bore | — |
| Stick Cylinder - Stroke | — |
| Stick Cylinder - Bore | — |
| Maximum Pressure - Travel | — |
| Pilot System - Maximum Pressure | — |
| Maximum Pressure - Equipment | — |
| Maximum Pressure - Swing | — |
| Bucket Cylinder - Stroke | — |
| Pilot System - Maximum Flow | — |
| Bucket Cylinder - Bore | — |
| Boom Cylinder - Stroke | — |
Benefits & Features
Operator Station
Operator Station
The ergonomically designed operator station is spacious, quiet, and comfortable, assuring high productivity during a long work day. All switches are located on the right-hand console for convenient access.
Monitor
The monitor is a full-color Liquid Crystal Display (LCD) that can be adjusted to minimize sun glare and has the capability of displaying information in 27 languages.
Joystick Control
Low-effort pilot-operated joystick controls are designed to match the operator's natural wrist and arm position for maximum comfort and minimum fatigue.
Seat
The standard suspension seat provides a variety of adjustments to suit the operator's size and weight including fore/aft height and weight. Wide adjustable armrests and a seat belt are also included.
Console
The consoles feature a simple functional design to reduce operator fatigue, ease of switch operation, and excellent visibility. Both consoles have attached armrests with tilting adjustments.
Cab Exterior
The cab shell features thick steel tubing along the bottom perimeter of the cab, improving resistance to fatigue and vibration.
Cab Mounts
The cab shell is attached to the frame with viscous rubber cab mounts, which dampen vibrations and sound levels while enhancing operator comfort.
Windows
To maximize visibility, all glass is affixed directly to the cab, eliminating window frames. The upper front windshield opens, closes, and stores on the roof above the operator with a one-touch action release system.
Wipers
Pillar-mounted wipers increase the operator's viewing area and offer continuous and intermittent modes.
Engine
The Cat 3054C engine has been designed to meet U.S. EPA Tier 2 and EU Stage II equivalent emission standards. This engine incorporates a time-proven mechanical governor and a low-pressure fuel injection system that are major contributors to the improvement of fuel system robustness, high fuel efficiency, and ease of troubleshooting. High filtration performance from the primary filter incorporating a water separator and a secondary filter also help to improve fuel filtration system reliability.
Automatic Engine Control and Fuel Delivery
With a net power of 56 kW (75 hp) the 312D GC Series 2 has been designed with fuel economy in mind and burns approximately 14% less fuel when compared with the previous model depending on application.
Hydraulics
Outstanding Performance
- The 312D GC Series 2 hydraulic system is designed for high efficiency and performance. This compact design utilizes short tubes and lines to reduce friction and pressure drops, resulting in a more efficient use of power.
- Hydraulic snubbers at the rod end of the boom cylinders and both ends of the stick cylinders cushion shock, reduce sound, and increase cylinder life.
- Flow is reduced to a minimum when controls are in neutral to reduce fuel consumption and extend component life.
- A hydraulic cross-sensing system uses two hydraulic pumps up under all operating conditions, improving productivity with faster implement speeds and quicker, stronger pivot turns.
Boom and Stick Regeneration Circuit
The boom and stick regeneration circuit saves energy during boom-down and stick-in operation, increasing efficiency and lowering operating costs.
Easy Operation
Work mode and power mode switches have been eliminated making full power available at all times. Operators do not need to learn different modes. An automatic boom and swing priority function automatically selects the best mode based on joystick movement.
Undercarriage and Structures
Caterpillar uses advanced engineering and software to analyze all structures, creating a durable, reliable machine for robust 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. Robot-welded track roller frames are press-formed, pentagonal units that deliver exceptional strength and service life.
Grease Lubricated Track
Grease lubricated track seals protect the track link and deliver long track link pin and bushing inner wear.
Travel Motors
Travel motors with automatic speed selection let the 312D GC Series 2 automatically change up and down from high and low speeds in a smooth, controlled manner.
Front Linkage
Cat booms and sticks are welded, box-section structures with thick multi-plate high-strength steel fabrications. Service intervals are extended with self-lubricating bearings that resist corrosion and galling for superior durability.
Stick
A 2.5 m reach stick has new forged parts, and welded joints for increased durability, digging force, and lifting capability.
Boom
A 4.65 m reach boom features parts made from a new forging pattern. A light attached to the left side offers improved visibility in dark and low-light conditions.
Versatility
Cat Buckets and Cat Ground Engaging Tools (GET) are designed and matched to the machine ensuring optimal performance and fuel consumption. They are built to Caterpillar specifications guaranteeing quality and durability, whatever the application.
General Buckets
- For digging in low-impact, moderately abrasive materials such as dirt, loam, gravel, and clay.
- Shallow profile is easier to empty sticky materials.
- Lightest structures decrease load time and increase the weight that can be lifted.
- Pre-drilled sidebars for optional sidecutters.
Service and Maintenance
Ground Level Service
The design and layout of the 312D GC Series 2 was made with the service technician in mind. Most service locations are easily accessible at ground level allowing service and maintenance to get completed quickly and efficiently.
Pump Compartment
A service door on the right side of the upper structure allows ground-level access to the pump, pilot filter, drain filter, and the engine oil filter.
Radiator Compartment
The left service door allows easy access to the engine radiator, oil cooler, air-to-air-aftercooler, water separator and first and second fuel filter. A reserve tank and drain cock are attached to the radiator for simplified maintenance. The air filter features a double-element construction for superior cleaning efficiency. When the air cleaner plugs, a warning is displayed on the monitor screen inside the cab.
Hydraulic Filter
The hydraulic return filter is an in-tank design with a service life of 2,000 hours. A sensor indicates through the in-cab monitor when the filter is plugged and needs to be replaced.
Greasing Points
A concentrated remote greasing block on the boom delivers grease to hard-to-reach locations on the front.
Fan Guard
The engine radiator fan is 180 degree enclosed by fine wire mesh, reducing the risk of an accident.
Anti-Skid Plate
Anti-skid plate covers top of storage box and upper structure to prevent slipping during maintenance.
Diagnostics and Monitoring
The 312D GC Series 2 is equipped with S·O·SSM sampling ports and hydraulic test ports for the hydraulic system, engine oil, and for coolant. A test connection for the Cat Electronic Technician (Cat ET) service tool is located behind the cab.
Extended Service Interval
312D GC Series 2 service and maintenance intervals are long which results in reduced service time and increased machine availability.
Complete Customer Support
Product Support
You will find nearly all parts at our dealer parts counter. Cat dealers utilize a worldwide computer network to find in-stock parts to minimize machine downtime. Save money with remanufactured components.
Machine Selection
Make detailed comparisons of the machines you are considering before you buy. What are the job requirements, machine attachments and operating hours? What production is needed? Your Cat dealer can provide recommendations.
Maintenance Services
Repair option programs guarantee the cost of repairs up front. Condition monitoring services and diagnostic programs such as scheduled oil sampling, coolant sampling, and technical analysis help you avoid unscheduled repairs.
Customer Support Agreements
Cat dealers offer a variety of product support agreements, and work with customers to develop a plan that best meets specific needs. These plans can cover the entire machine, including attachments, to help protect the customer's investment.
Replacement
Repair, rebuild, or replace? Your Cat dealer can help you evaluate the cost involved so you can make the right choice.
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Standard Equipment
- ENGINE
- Diesel engine – Cat 3054C with mechanical governor: – 2300 m altitude capability – 50 amp alternator, air intake heater – Meets Tier 2 and Stage II equivalent emission standards
- 10 micron fuel filter
- 4 micron fuel pre-filter
- One touch low idle with AEC
- Remote engine oil filter
- Radial seal air filter, double element
- Two speed travel
- Water separator in fuel line with indicator
- Waved fin radiator with side by side type oil cooler
- Fix type A/C condenser
- 43° C High ambient cooling
- Air precleaner
- CAB
- Bolt-on FOGS capability
- Openable front windshield with assist device
- Pillar mounted upper windshield wiper and washer
- Front windshield glass split by 70/30
- Cab sliding upper door window
- Rear window, emergency exit
- Removable lower windshield with in cab storage bracket
- Metal hatch
- Interior lighting
- Standard joystick
- Laminated front upper windshield
- Seat high back, mechanical suspension with head rest
- Seat belt, retractable
- Floor mat
- Bi-level air conditioner (auto) with defroster
- Windshield washer
- Coat hook
- Ashtray and lighter
- Beverage holder
- Literature holder
- Radio mounting
- Mounting for two stereo speakers
- Antenna flexible type
- Storage compartment suitable for lunch box
- Monitor: – Language display – Full graphic and full color display – Warning information – Filter/fluid change information – Machine condition – Error code and tool mode setting information – Full time clock on monitor
- Positive filtered ventilation
- Seat integrated control joystick
- Adjustable armrest
- Adjustable console
- Neutral lever (lock out) for all controls
- Travel control pedals with removable hand levers
- Capability of installing two additional pedals
- ELECTRICAL
- Circuit breaker
- Cat battery
- COUNTERWEIGHT
- Counterweight without lifting eye (2100 kg)
- FRONT LINKAGE
- Boom, 4.65 m
- Stick, 2.5 m
- Bucket linkage
- TECHNOLOGY
- Product Link™, Satellite
- HYDRAULIC
- Hydraulic main pump
- High performance hydraulic return filter
- Regeneration control for boom and stick
- Boom lowering device for back up
- Boom drift reducing valve
- Stick drift reducing valve
- Reverse swing damping valve
- Automatic swing parking brake
- SAFETY AND SECURITY
- Cat one key security system
- Signaling/warning horn
- Mirrors, rearview (frame – right, cab – left)
- Secondary engine shutoff switch
- Door locks
- Cap locks on fuel and hydraulic tanks
- Lockable external tool/storage box
- Openable skylight for emergency exit
- Rearview camera-ready
- Travel alarm
- LIGHTS
- Halogen boom light (right side)
- Exterior lights integrated into storage box
- Halogen cab-mounted working lights
- Halogen boom lights
- UNDERCARRIAGE
- Grease lubricated track (GLT2)
- Idler section track guiding guard
- Towing eye on base frame
- Standard idler tension spring
- Guard, standard bottom
- 500 mm triple grouser shoes
Related Products
General Duty
Cat® General Duty Buckets are the perfect choice for general digging, loading and other dirt-handling applications.
| Model | Width | ||
|---|---|---|---|
| 1050mm (42in) | — | — | J250 |