Technical Data - buchhammer-handel.de

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Improved performance and rugged durability combine to maximize productivity. 

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Roomy and quiet with ergonomic 

control placement has excellent 

sightlines to the work area to help keep 

operator fatigue low and production up 

throughout the entire shift. Optional 

climate control maintains constant 

temperature in the cab in both hot and 

cold weather. �� 

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An user friendly new monitor that 

shows a wide variety of useful 

information for machine operation 

and provides high efficient service 

data and diagnostic capabilities 

while maximizing fuel efficiency 

and performance. �� 

Improved performance. 

Increased horsepower, better controllability, 

extended service intervals, optimized VA boom structure, 

a revolutionary tool control system and a redesigned 

ergonomic operator station increase your productivity 

and lower your operating costs. 

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The 312C is powered by the Cat 3064 T 

engine which complies with worldwide 

emissions requirements. This engine 

includes several design features which 

enhance performance, efficiency and 

reliability. Engine service intervals are 

at 500 hours. ��

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The open-center, two-pump hydraulic 

system features pump flow control 

which improves fuel efficiency, ensures 

smooth controllability, reduces sound 

levels and extends component life, 

through an increased maximum flow. 

The unique tool control option offers 

the ability to optimize the machine 

performances according to 5 tool 

specifications, and to set priorities 

between tools and implements for 

maximized efficiency. �� 

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Longer service intervals and easier 

maintenance results in better machine 

availability and lower owning and 

operating costs. Electronic diagnostics 

means increased productivity. �� 

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Rugged Caterpillar ® undercarriage 

design and proven structural 

manufacturing techniques assure 

outstanding durability in the toughest 

applications, resulting in stability, 

durability and low maintenance. 

Blade option adds versatility. Standard 

grease-lubricated tracks extend the 

undercarriage life. �� 

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Caterpillar design and manufacturing 

techniques assure outstanding durability 

and service life from these important 

components. �� 

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A wide variety of bucket types 

with aggressive bucket designs 

take advantage of the 312C L s higher 

power to improve productivity. 

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Ex-factory available Buckets, Multiprocessors, 

Sorting and Demolition 

Grapples, Hammers and Quick 

Couplers provide a total solution 

package to the end-user. �� 

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Your Cat dealer offers a wide range of 

services that can be set up under a 

customer support agreement when you 

purchase your equipment. The dealer 

will help you choose a plan that can 

cover everything from machine and 

attachment selection to replacement. 

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Designed for comfort and ease of operation. 

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�� This operator 

work station is quiet with ergonomic 

control placement and convenient 

adjustments, low lever and pedal 

effort, ergonomic seat design, and 

highly efficient ventilation. 

�� Excellent viewing area 

through large, wide windows. A large 

skylight provides upward visibility. 

The upper front window features 

parallelogram wiper to provide unobstructed 

front viewing. The upper 

left side door window can slide open. 

The lower window provides visibility 

to the tracks and the ground next to 

the machine. The rear window offers 

a good view behind and to the left. 

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Each of the controls is positioned 

within easy reach of the operator. 

�� The double wall, pressed 

cab shell is mounted to the swing 

frame using viscous mounts for 

reduced sound and vibrations. 

�� A standard large wiper for 

the upper and lower windows offers 

the selection between continuous 

and intermittent modes and provides 

a better visibility. 

�� Dial throttle with ten 

settings for simple, precise repeatable 

engine speed adjustment. 

�� Optional 

automatic climate control maintains 

constant temperature in the cab in both 

hot and cold weather conditions and, 

at the touch of a switch, the operator 

can choose between fresh or 

recirculated air. 

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Caterpillar monitor panel includes fuel 

level, hydraulic oil temperature and 

engine temperature gauges, machine 

condition indicators, and operator 

controls, all combined in one single 

display (refer to Multipro on pg. 6). 

� �� Joysticks control all 

implements and swing functions with 

minimal effort. This includes 4 switches 

on each joystick. The integrated joystick 

consoles adjust to operator preference. 

Joystick consoles are suspended as part 

of the seat arrangement. Special joystick 

for the tool control option feature 

modulated switches. 

� �� Hand or foot actuated 

travel controls allow the operator to 

move the excavator while working the 

boom, stick and bucket. Hand levers 

are easily removable. 

� �� Hydraulic 

activation control lever deactivates 

hydraulic functions and prevents startup 

when the operator exits the cab. 

� �� The fully adjustable 

suspension seat includes an impressive 

range of comfort features. In addition to 

fore/aft height and weight adjustments, 

it also offers wide arm support, headrest 

and a retractable seat belt. The height 

adjustment system of the seat and 

console allows to adjust them together, 

while the console height can be also 

adjusted independently. Moreover, 

the armrest also has its owns height 

adjustment mechanism, providing good 

access to control levers. 

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The Multipro manages the engine and hydraulics for maximum performance and enhanced 

monitoring capabilities through a new user friendly interface. 

�� It controls state-of-the-art 

hydraulics and engine performance for 

maximized productivity, increased fuel 

efficiency, and lower emission and 

sound levels. 

�� The 312C uses 

a compact monitor that nevertheless 

shows a variety of information. 

The 312C monitor uses a liquid crystal 

display, and the dot matrix screen is 

capable of displaying a wide range of 

items, such as written messages. 

It consists of an 8-key keyboard that 

makes it user friendly to the operator. 

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The 312C monitor is capable of 

recording five hydraulic pump flow 

and hydraulic pressure settings for 

various tools. This function is very 

convenient because it eliminates the 

need to adjust the hydraulics every time 

a tool is changed and instantly provides 

the operator with the correct setting 

of flow and pressure for each tool. 

�� This monitor is capable of autodiagnostic 

and is designed to alert an 

impending problem to the operator. 

�� In addition to icons, 

the 312C monitor displays languagebased 

information identifying various 

functions. 20 different display 

languages are available. 

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�� The monitor 

provides the number of hours that filter 

and fluids have been used. It also 

displays filter and oil change warnings 

when the number of hours used reaches 

the maintenance interval. 

�� consists of 

five areas: 

� Alert indicator 

� Engine speed dial indicator 

� Gauges 

� Message area 

� Key pad

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Caterpillar hydraulics deliver power and control to keep material moving at high volume. 

�� The 312C hydraulic 

system was designed to provide a high 

level of efficiency. With all major 

components located close together, 

shorter tubes and lines are needed, 

resulting in less friction loss in the lines 

and reduced pressure drops. 

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Improves productivity with faster 

implement speeds and quicker, 

stronger pivot turns. 

�� Use of O-ring 

face seals on all high-pressure and pilot 

circuits reduces leaks opportunities and 

makes assembly easy. 

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For simpler operation, work mode 

and power mode switches have been 

eliminated. Instead, the automatic boom 

and swing priority function selects 

the best engine and pump regulation, 

based on joystick movement. 

�� Three types of 

stackable valves are available on the 

312C and attached directly to the main 

control valve. Up to two stackable 

valves can be used in combination 

with the main control valve to provide 

a variety of different functions. 

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5 tools settings can be programmed and 

selected from the monitor: 

drastic reduction of mistake risk 

quick installation of a tool 

less repairs 

higher tool life 

automatic tool setting by single 

monitor selection 

full operation from joysticks 

�� The hydraulic system 

offers precise control of the 312C, 

reducing operator fatigue, improving 

operator effectiveness and efficiency, 

which ultimately translates into 

enhanced performance. 

�� The auxiliary 

hydraulic valve is standard of the 312C 

for use with optional hydraulic circuits. 

�� Hydraulic cylinder 

snubbers at the rod-end of boom cylinders 

and both ends of the stick cylinders 

cushion shocks, reduce sound and 

increase cylinder life. 

�� Scheduled oil sampling 

allows for scheduled replacement or repair 

of components before the machine is 

stopped because of a major breakdown. 

��With the tool control (option), 

the machine is being provided with an 

electronic additional programmable 

stackable valve and the ability to optimize 

the machine performances according to 

5 tool specifications (including settings for 

electrical relief valve for hammer circuit 

and flow). Flow distribution between 

implements is analyzed and optimized, 

with the ability to set priority on the tool or 

the implements. This option also includes 

special joysticks with modulated switches 

for medium and high pressure modulation. 

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The 4-cylinder turbocharged engine is built for power, reliability, economy and 

easy maintenance. 

�� The 312C is powered 

by a Cat 3064 T diesel engine, built for 

world-class performance and reliability, 

low maintenance, long life and 

excellent fuel economy for low 

operating costs. 

The 3064 T engine complies with 

Stage II Emission Directive 97/68/EC. 

EU Sound compliant (2000/14/EC) 

The oil filter, oil level gauge, fuel 

filter and priming pump are located 

on the top of the engine for easy 

maintenance. 

Big capacity of the sump and the oil 

cartridge allows to reinforce the 

maintenance intervals at 500 hours. 

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�� The engine is designed for 

high torque rise at middle rpm, a feature 

that is especially beneficial for heavyduty 

use. 

�� Designed to be as 

compact as possible while maintaining 

high performance and excellent 

response. 

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The automatic engine control (AEC) 

maximizes fuel efficiency and reduces 

sound levels. The control automatically 

reduces engine speed to suit application. 

For further ease and control, a onetouch 

low idle button on the right 

joystick lever will also reduce engine 

levels, conserve fuel and reduce engine 

sound levels. Operators can use the lowidle 

button at any time, such as between 

cycles when loading trucks. 

�� To avoid white 

smoke during cold starting, the 3064 T 

engine is equipped with an air heater on 

the inlet manifold. 

�� Efficient direct injection 

fuel system means lower operating cost. 

�� The 3064 T engine 

has the best fuel consumption in this 

class of diesel engines. It features 

improved thermal efficiency and 

reduced friction resistance between 

piston and liners. 

�� Eight balance, one-piece, 

forged crankshaft enhances balance and 

decreases vibration and is induction 

hardened to improve abrasion 

resistance. 

�� Heat resistant aluminum alloy 

pistons have a short compression 

height, reducing weight and improving 

efficiency.

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Simplified service and maintenance features save you time and money. 

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312C service and maintenance intervals 

have been extended to reduce machine 

service time and increase machine 

availability. 

�� The left rear 

service door allows easy access to 

the engine radiator and the oil cooler. 

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. 

�� The design 

and layout of the 312C was made 

with the service technician in mind. 

Many service locations are easily 

accessible at ground level allowing 

critical maintenance to get done 

quickly and efficiently. 

�� The oil cooler 

swings out horizontally for excellent 

cleaning (optional equipment). 

�� A service door 

on the right side of the upper structure 

allows ground-level access to the pump 

and pilot filter. 

�� The hydraulic return 

filter, a capsule filter, is situated outside 

the hydraulic tank. This filter prevents 

contaminants from entering the system 

when hydraulic oil is changed and keeps 

the operation clean. 

�� Anti-skid plate covers 

the top of storage box and upper 

structure to prevent slipping during 

maintenance. 

�� Remote greasing block 

on the boom and two grease points for 

the swing bearing deliver grease to hardto-reach 

locations. 

�� Engine can be 

accessed from the upper structure or 

from under the machine. The engine 

and pump compartment are separated 

by a partial steel wall. 

�� Water separator 

removes water from fuel even when 

under pressure and is located in the 

battery compartment. Optional water 

level sensor within cab alarm. 

�� Larger handrails 

and steps assist operator in climbing 

on and off machine. 

�� Grease 

lubricated seals protect the track link 

and deliver long track link pin and 

bushing inner wear life. 

�� Engine radiator fan is 

completely enclosed by fine wire mesh, 

reducing the risk of an accident. 

�� New boom and stick 

standard bearings only need greasing 

every 1000 hours. 

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Monitor Electronic Power Unit Control 

has diagnostic capabilities for service 

technicians use. Dealer service 

technicians can quickly and easily 

diagnose and adjust machine 

component maximizing uptime. 

Filter change information available 

in 20 different languages. 

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�� It includes a transceiver 

module (on-board the machine), office 

application PC software, and a satellite 

communications network to track 

machine hours, location, and warnings. 

Product Link simplifies maintenance 

scheduling, fleet management, 

unauthorized machine usage or 

movement, and product problem event 

tracking and diagnosis. 

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Durable undercarriage absorbs stresses and provides excellent stability. 

�� increases versatility. 

Helps level a working space so the 

312C sits firmly and digs vertically. 

Dozes and backfills trenches. 

Blade has a float position resulting 

in smooth levelling. 

Speeds site cleanup - objects can be 

trapped against the blade for easier 

bucket loading. 

With the blade down, lifting capacity 

over the front is increased. 

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�� Precision robotic 

welding helps ensure quality welds. 

These welds increase rigidity, reduce 

internal stresses and enhance durability 

for the chassis and track roller frames. 

�� Heavyduty, 

modified X-shaped chassis design. 

Cat undercarriage components are 

purposely oversized to offer heavy-duty 

performance and durability. 

�� Strutted track links are 

sealed for longer life. Track rollers, 

carrier rollers and idlers are also sealed 

and lubricated for excellent service life. 

�� Smooth auto 

shifting two-speed travel motors offer 

top travel speeds and plenty of pull on 

slopes or turns. 

�� Grease 

between pin and bushing, internal wear 

is reduced, contributing to extended 

undercarriage life. 

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Standard undercarriage is well suited 

for applications that have restricted 

working space, or have uneven or rocky 

terrain. 

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Long undercarriage (L) maximizes 

stability and lifting capacity. Long and 

sturdy undercarriage offers a very stable 

work platform. 

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The elimination of the ledge at carbody 

and roller frame juncture reduces 

material build-up and makes digging 

out easier. 

�� Standard idler guards 

maintain track alignment. Center 

section guards are standard on 312C L 

for additional protection on side slopes. 

* Custom product arrangements are available 

Consult your Caterpillar dealer for specifics.

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The 312C structural components are the backbone of the machine s durability. 

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Advanced carbody design stands up 

in the toughest applications. 

Modified X-shaped, box-section 

carbody provides excellent 

resistance to torsional bending. 

Upper structure weight and 

stresses are distributed evenly 

across the full length of the track 

roller frame. 

Smooth transitions and long 

welds reduce stresses at the 

carbody-to-roller frame junctions 

for excellent durability. 

Robotic welding ensures 

consistent, high-quality welds 

throughout the manufacturing 

process. 

�� Welded track roller 

frame pentagonal box section is pressformed 

to deliver exceptional strength 

and service life. 

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Rugged main frame is designed for 

maximum durability and efficient 

use of materials. 

Upper frame utilizes curved side 

rails, which are die-formed, 

for excellent uniformity and 

strength throughout the length. 

Box section channels improve 

upper frame rigidity under 

the cab. 

Inverted U-channels span the 

width of the main frame and are 

formed, rather than fabricated, 

for superior strength and 

reduced weight. 

Boom tower and main rails are 

constructed of solid, high-tensile 

strength steel plates. 

Boom foot and engine mount 

areas reinforced for additional 

strength. 

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The 312C L has designed-in flexibility to help bring total solution for higher production and 

efficiency to your jobs. 

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Select the right combination for the job 

with your Cat dealer and you ll help 

ensure top production from the start. 

�� Caterpillar excavator 

booms and sticks are built for 

performance and long service life. 

Large, welded, box-section structures 

with thick, multi-plate fabrications in 

high-stress areas. 

Construction allows structures to flex 

and dissipate stresses. 

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The choice of two standard application 

booms and three sticks plus a wide 

selection of buckets and attachments, 

means the 312C offers several 

combinations of reach and digging 

forces for optimum versatility. 

�� One-piece boom for 

all standard applications. 

�� A new variable 

angle boom (VA) with a significantly 

reduced weight, for vertical wall 

digging, working near obstacles or in 

tight quarters. The variable geometry 

boom offers flexibility and versatility in 

the working envelop. 

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With full extension, the working range 

gives both maximum dig depth and 

reach above ground. Equally, when the 

VA boom is retracted, it can work 

closer to its tracks, increase lifting 

capacity and work in confined areas. All 

hydraulic adjustments to the VA boom 

angle can be made from the cab during 

a work cycle for true versatility. 

�� Short stick for mass 

excavation and maximum breakout 

force bucket up to 0.75 m 3 . 

�� Medium stick for 

maximum versatility bucket up to 

0.68 m 3 . 

�� Long stick for all standard 

applications bucket up to 0.61 m 3 . 

�� New bearing 

technology has extended the front 

linkage greasing intervals for all 

bearings, up to 1000 hours for the 

boom and stick and up to 100 hours 

for the bucket. 

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All Cat buckets are available in both 

quick coupler and pin-on version. 

� �� Digs and loads soft 

to medium materials such as clay and 

earth. Features weld on tip adapters, 

hardened cutting edge and side bars. 

� �� Digs and 

loads compact/abrasive materials like 

earth/rock, sand/clay, sand/gravel, coal, 

chalk and low abrasion ores. Features 

abrasion resistant steel for all wear parts. 

� �� Wide, light 

bucket used mainly with long reach 

configurations to clean waterbeds 

and banks. 

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�� Penetration 

�� Penetration Long Life 

�� Short 

�� Long 

�� Heavy Duty Long 

�� Heavy Duty Abrasion 

�� Sharp / Corner Sharp 

�� Wide 

�� Twin Sharp 

�� Long Sharp 

�� Penetration Plus 

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User-friendly, integrated electro-hydraulics make changing tools easy and quick and 

allow the operator to focus on efficient work. 

�� Five hydraulic pump flow and pressure settings 

can be preset on the Multipro, eliminating the need to adjust 

the hydraulics each time a tool is changed. Selecting the proper 

setting from the Multipro s menu instantly provides the operator 

with the correct amount of flow and pressure for the tool. 

The unique Cat proportional sliding switches provide 

modulation to the tool and make precision work easy. 

�� Caterpillar Quick Couplers enable the operator 

to simply release one work tool and pick up another. 

Your hydraulic excavator becomes highly versatile. 

To suit your business and application needs, Caterpillar offers 

two different types of Quick Couplers. 

�� The dedicated CW-Series 

quick coupler enables a quick tool exchange while maintaining 

top machine performance. It is available in a hydraulic and 

spindle version. 

The hydraulic version is available in a standard 

and a narrow version and makes it very easy 

for the operator to switch tools 

without having to leave the cab. 

The spindle version is a user-friendly 

mechanical version that can later be 

easily converted into the hydraulic version 

if required. The spindle version is also 

available in the narrow and standard version. 

A lifting hook is added to the dedicated Quick Coupler 

for maximum lift capacity. 

�� This hydraulically controlled 

Pin Grabber Plus quick coupler makes changing buckets and 

other popular work tools simple and fast. The Pin Grabber Plus 

coupler mounts to the end of the stick and allows buckets, 

clamshells and other work tools to be used with little or no 

modification. 

Each model fully adjusts to different pin spreads of various 

tools regardless of manufacturer it is the only coupler that 

accommodates a wide range of work tool makes and models. 

Pin-on assembly makes coupler installation and removal fast 

and easy. 

Coupler retains the same bucket opening and closing angles. 

Buckets can be reversed for greater flexibility when working 

around and under obstructions. 

Integrated lift eye. 

A factory installed Quick Coupler hydraulic circuit avoids 

difficult and costly retrofitting of Quick Coupler hydraulics 

and allows usage of the most frequently used Quick Coupler 

systems. Ask your Cat dealer for more specific information. 

�� The Caterpillar Multi-Processors can be 

equipped with different jaw types depending on your need. 

�� The Multi-Grapple with unlimited left and 

right rotation is the ideal tool for stripping, sorting, handling 

and loading. 

�� Specifically designed for handling scrap 

and rock in recycling and transfer applications. 

�� The Cat hammers with a wide variety of tools 

provide the perfect match for maximal life, efficiency and 

productivity. 

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When choosing between various work tool models that can be installed onto the same machine configuration, consider work tool 

application, productivity requirements, and durability. Refer to work tool specifications for application recommendations and 

productivity information. 

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Caterpillar 3064 T turbocharged diesel engine. 

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Gross power 70 95 

Net power 

ISO 9249 67 91 

EEC 80/1269 67 91 

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Bore 102 mm 

Stroke 130 mm 

Displacement 4.2 liters 

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Two rocker pedals with detachable hand levers control steering and 

travel functions. 

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controls are pilot-operated for 

reduced efforts 

left pedal and lever control left track; 

right pedal and lever control right 

track 

when idlers are in front, pushing both 

pedals or levers forward moves the 

excavator straight ahead 

when the idlers are in front, rocking 

both pedals or pulling both levers 

backward moves the excavator 

straight back 

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Caterpillar designed and built track-type undercarriage. 

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All engine horsepower (hp) are metric 

including front page. 

net power advertised is the power 

available at the flywheel when the 

engine is equipped with fan, air 

cleaner, muffler, and alternator 

no engine derating required below 

1500 m altitude 

Meets Stage II EU Emission 

Directive 97/68/EC. 

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Track width* �� 

500 mm triple grouser 0.45 bar 0.47 bar 0.45 bar 




850 mm triple grouser 0.27 bar 0.25 bar 

* Custom product undercarriage are available. 

Consult your Caterpillar dealer for specifics. 

moving one pedal or lever more 

than the other, either forward or 

backward, results in a gradual turn 

moving one pedal or lever forward 

and the other pedal or lever 

backward counter-rotates the tracks 

for spot turns 

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The operator sound level measured 

according to the procedures specified 

in ISO 6396 is 74 dB(A), for cab 

offered by Caterpillar, when properly 

installed and maintained and tested 

with the doors and windows closed. 

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The labeled spectator sound power 

level measured according to the test 

procedures and conditions specified 

in 2000/14/EC is 101 dB(A). 

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Hydrostatic with independent planetary 

reduction. 

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Swing Torque 30.4 kNm 

Swing Speed 12.0 rpm 

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the swing mechanism is driven by a 

pinion gear sealed in a grease bath 

through a double-reduction planetary 

gear set 

swing priority and fine control are 

automatic 

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Meets the following standard: 

ISO 10265:1998 

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wet, multiple-disc brakes are used on 

the final drive input shafts 

spring-applied, hydraulically released 

actuating a travel control 

simultaneously releases the brakes 

when the controls are released, the 

brakes automatically apply 

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Drive system is fully hydrostatic. 

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Maximum drawbar pull 

312C 108 kN 

312C L 126 kN 

Maximum travel speed 

312C 5.5 km/h 

312C L 5.1 km/h 

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each track is driven by one 

independent, automatic shifting, twospeed 

axial piston motor via integral 

planetary final drives 

each drive module is well integrated 

into the roller frame for total 

protection 

heavy-duty travel drive increase 

drawbar pull and provide a better 

turnability. 

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Bolt-on Falling Object Guard System 

(FOGS) is available as an attachment. 

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Optional Falling Object Guard System 

is designed to protect the operator from 

falling objects, and is certified under 

ISO 3449-1984 specifications. 

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Two variable displacement, axial-piston 

pumps power the boom, stick, swing, 

bucket, auxiliary and travel circuits. 

One single-section, gear-type pump 

powers the pilot circuit. 

Main Implement System 

Maximum Flow (2x) 127 l/min 

Maximum pressure 

Implements 299 bar 

Travel 343 bar 

Swing 231 bar 

Pilot System 

Maximum flow 23.7 l/min 

Maximum pressure 41 bar 

Blade System 

Maximum flow 58.5 l/min 

Maximum pressure 206 bar 

Boom Cylinder 

Bore 110 mm 

Stroke 1015 mm 

Stick Cylinder 

Bore 120 mm 

Stroke 1197 mm 

Bucket Cylinder 

Bore 100 mm 

Stroke 939 mm 

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Fuel Tank 250 

Cooling System 17.5 

Engine Oil 17.5 

Swing Drive 3 

Final Drive (each) 2.5 

Hydraulic system 

(including tank) 164 

Hydraulic tank 90 

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Two joystick hand levers actuate boom, 

stick, bucket and swing. 

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move forward and backward to lower 

and raise boom 

move left and right to control bucket 

curl and dump 

button on top is one-touch low idle 

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move forward and backward to move 

stick out and in 

move left and right to control 

direction of swing 

button on top controls horn 

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oblique movement of either lever 

operates two functions 

simultaneously 

manually applied lever on left console 

cuts off pilot pressure for joysticks 

and travel controls and electrical 

power for engine starting circuit 

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revolutionary joysticks with 

modulated switches are available 

with tool control option 

Allows a modulated actuation of 

medium pressure on the left joystick 

and a hammer or any other tool on 

right joystick.

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All dimensions are approximate. 

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� Shipping height (with bucket)* 

Short stick 2650 

Medium stick 2655 

Long stick 2655 

� Shipping length 

Short stick 7630 

Medium stick 7595 

Long stick 7610 

� Tail swing radius 2130 

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� Swing ground clearance 900 

� Length to centers of rollers 

312C 2780 

312C L 3040 

� Track length 

312C 3490 

312C L 3750 

� Shipping width 

shoes of 500 mm 2490 

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Machine is equipped with One-piece boom and 900 mm/0.54 m 3 bucket. 

Weights will depend on final machine configuration. 

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� Track gauge 1990 

� Ground clearance 440 

� Cab height 2900 

� Overall width with 

mirrors installed 2820 

� Shipping width upper frame 2550 

* may be limited by cab height �� 

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500 mm triple grouser 12 720 12 790 12 868 




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2780 mm Blade 850 850 850 

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Contact your Caterpillar dealer for special bucket requirements. 

� Bite width mm 

� Tip radius mm 

Capacity m 3 

Weight kg 

Number of teeth 

� Bite width mm 

Capacity m 3 

Weight kg 

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Bite width mm 

Weight kg 

Capacity m 3 

Short stick kg/m 3 

Medium stick kg/m 3 

Long stick kg/m 3 

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Clay, dry 1500 

Clay, wet 1660 

Earth, dry 1510 

Earth, wet 1600 

Loam 1250 

Gravel, dry 1510 

Gravel, wet 2000 

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450 1000 1000 1100 1200 600 700 450 1000 

1220 1220 1220 1220 1220 1220 1220 1220 1220 

0.24 0.55 0.61 0.68 0.75 0.33 0.40 0.24 0.61 

236 332 348 371 390 264 287 236 348 

3 5 5 6 6 3 4 3 5 

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1800 2000 

0.63 0.83 

450 530 

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450 1000 1000 1100 1200 600 700 450 600 1000 

236 332 348 371 390 264 287 236 291 348 

0.24 0.55 0.61 0.68 0.75 0.33 0.40 0.24 0.33 0.61 

1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 

1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 

1800 1800 1800 1500 1500 1800 1800 1800 1800 1800 

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Gravel, pit run 1930 

Rock/dirt, 50% 1720 

Sand, dry 1425 

Sand, wet 1700 

Sand and Clay 1600 

Stone, crushed 1600 

Top soil 950 

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One-piece boom �� 

Long stick 0.235 to 0.61 m 3 

Medium stick 0.235 to 0.68 m 3 

Short stick 0.235 to 0.75 m 3 

Variable Adjustable Boom (VA) 

Long stick 0.235 to 0.61 m 3 

Medium stick 0.235 to 0.68 m 3 

Short stick 0.235 to 0.75 m 3

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� Maximum vertical wall digging depth 4629 5012 5520 

� Maximum digging depth 

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� Maximum reach at ground level 7814 8195 8644 

� Maximum cutting height 8274 8529 8751 

� Maximum loading height 5834 6083 6316 

� Minimum loading height 2396 1997 1510 

Digging forces: 

Stick 71 kN 63 kN 57 kN 

Bucket 84 kN 84 kN 84 kN 

Bucket Tip Radius 1.22 m 1.22 m 1.22 m 

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� Maximum digging depth 4740 5130 5620 

� Maximum vertical wall digging depth 2820 3210 3640 

� Maximum digging depth 

at 2440 mm flat floor 4610 5000 5500 

� Maximum reach at ground level 7814 8220 8680 

� Maximum cutting height 9170 9520 9910 

� Maximum loading height 6910 7260 7650 

� Minimum loading height 3185 2830 2540 


19

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Standard and optional equipment may vary. Consult your Caterpillar dealer for specifics. 

�� 

55 Ampere alternator 

Light, storage box mounted (one) 

Signaling / Warning horn 

Caterpillar batteries (750 CCA) 

�� 

Bottom guard 

Track motor guards 

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Sound and vibration suppressed cab 

with double wall cab shell 

Bolt-on FOGS capability 

Washable floor mat 

Integrated joystick consoles and 

suspended as part of seat arrangement 

Each joystick with 3 auxiliary functions 

and electrical wiring protection 

Fully adjustable standard suspension 

seat: 

Ergonomic design 

Adjustable armrests and headrest 

Four way adjustable (up-down, 

front-rear) 

Weight adjustment and retractable 

seatbelt 

Language display Multipro monitor: 

Warning information 

Filter/Fluid change information 

Working hour information 

Machine condition 

Error code 

Tool mode setting information and 

prognostic 

Start up level check for oil and 

coolant 

Full time clock (2 weeks after 

shut off) 

Cab windows: 

Front windshield split glass by 50/50 

Openable front windshield upper & 

lower with assist device 

Alternate exit : Hammer to break glass 

Sliding upper door window 

Polycarbonate skylight 

Single windshield parallel wiper and 

washer 

Neutral lever lock out for all controls 

Travel control pedals with removable 

hand levers 

Platform with provision for two 

attachment control pedals 

Dial-type throttle 

Highly efficient ventilation system 

Heater and defroster 

Positive filtered ventilation, 

pressurized cab 

Radio mounting (DIN) on upper rear, 

with wiring, antenna and provision 

for 2 stereo speakers 

Ashtray with lighter 

Beverage holder, coat hook 

Storage compartment suitable for lunch 

box and literature holder 

Utility space for magazines 

Interior lighting 

12V-5A Power supply 

(Cigar lighter type socket) 

�� 

Cat 3064 T diesel engine: 

Low Emission, Low Noise version 

24 volt electric starting and electrical 

start aid 

Mechanical governor 

1500 m altitude capability 

Air intake standard air inlet heater 

One touch low idle with AEC 

Water separator in fuel line 

Stage II emission package 

Two speed travel with automatic shift 

change 

Straight line travel 

Variable displacement, Negative Flow 

Control hydraulic system 


�� 

Greased Lubricated Track 

undercarriage: 

600 mm triple grouser shoes on 

312C, 312C L 

Hydraulic track adjuster 

Idler-end track guiding guards 

Center track guiding guards 

Heavy Duty travel drives 

Step group to meet EU regulations 

�� 

Hydraulic cross sensing system 

Auxiliary hydraulic valve 

(high pressure) 

Auto regeneration control for boom 

and stick 

Reverse swing damping valve 

Automatic swing parking brake 

Hydraulic cylinder snubbers 

Boom and stick drift reducing valves 

Caterpillar XT hoses 

O-ring face seal couplings 

Over heat prevention system 

Hydraulic oil cooler 

Partial firewall between pump 

compartment and engine 

Electronic Power Unit Control, with 

internal diagnostic capabilities 

Capability of auxiliary circuit 

Capability of stackable valves for main 

valve 

Separate no-oil-drip hydraulic capsule 

filter avoiding spills and 

contamination during replacement 

Scheduled Oil Sampling port 

Remote greasing block 

(boom, swing bearing) 

Caterpillar Radial Seal Air Filter 

Rearview mirrors, frame-right and 

cab-left 

Counterweight 

Machine lifting point plate on 

counterweight 

Door and cap locks plus Caterpillar one 

key security system 

CE Mark package 

Stage II package to meet EU Sound 

regulation.

�� 

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Boom: 

one-piece, with light, left side: 4.65 m 

hydraulically adjustable (VA), 

with light, left side 

Single Offset Boom 

Stick: 

3000 mm 

2500 mm 

2100 mm 

Boom lowering check valve 

Stick lowering check valve 

VA Boom and offset boom check valves 

Bucket linkage 

Buckets and tips 

Quick coupler 

�� 

Light: 

working, cab mounted (two) 

falling objects guard (two) 

boom, right side 

Travel alarm 

Cab working lights 

�� 

Swivel guard 

Falling objects guard (FOGS) 

Bottom guard, heavy duty 

�� 

Air conditioner, with automatic 

climate control 

Sun protective visor, windshield 

Rain protective visor, windshield 

Radio AM/FM, Tape 

Optional fully adjustable suspension 

seat with: 

headrest 

higher back seat 

tiltable integrated consoles 

Seat heater with headrest 

Lunch box cover 

12V-7A power supply 

Special comfort packages 

�� 

Grease-lubricated Track with: 

500 mm triple grouser 






900 mm LGP (custom product)* 

1400 mm LGP (custom product)* 

Sealed and lubricated tracks with: 

600 mm triple grouser (312C L) 


Special arrangement High/Wide 2080 mm 

(custom product)* 

Special arrangement LGP 2420 mm 


Rubber pads: 500 mm and 600 mm 


Blade (for 312C L) : 

2490 mm for 500 mm 

triple grouser shoes 

2625 mm for 600 mm 


2780 mm for 700 and 770 mm 


Center track guiding guard 

Front and rear track guiding guard 

Full length track guiding guard 

(for 312C L) 

�� 

High pressure auxiliary hydraulic 

arrangements: 

single function arrangement 

hydraulic combined function 

arrangement (includes 2 pump 

flow capability) 

two pump flow arrangement 

electronic combined function 

arrangement (tool control) 

High pressure auxiliary hydraulic lines 

for boom and stick 

Medium pressure hydraulic 

arrangement 

Medium pressure hydraulic lines for 

boom and stick 

Quick coupler hydraulic arrangement 

Quick coupler hydraulic lines for 

boom and stick 

Clamshell actuator 

Bio oil filling ex-factory 

Blade hydraulic medium pressure 

Versatility package 

�� 

Swing-Out Oil Cooler 

High ambient cooling (52� C) 

�� 

Electric refueling pump 

Water fuel separator with electrical 

sensor for alarm 

Product link (satellite transmission of 

machine data) 

Converter 24-12V 

Compartment storage with lid 

Special paint 

Services instructions 

* Consult your Caterpillar dealer for custom 

product arrangements. 


27

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www.CAT.com 

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© 2005 Caterpillar 

�� All rights reserved

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