®

311C U
Utility
Hydraulic Excavator

Cat® 3064 T Turbocharged Diesel Engine

Gross Power 61 kW/82 hp
Flywheel Power 59 kW/79 hp
Operating Weight* 11 980 kg
Swing Torque 31 kN
* Standard undercarriage, 2800 mm stick and 500 mm shoes.
311C Utility Hydraulic Excavator
Increased horsepower, better controllability, extended service intervals and a redesigned
operator station increase your productivity and lower your operating costs.

Engine Undercarriage and Structures Operator Station

The 311C U is powered by the Cat® Rugged Caterpillar® undercarriage Larger, quieter, climate-controlled cab
3064 T engine. This engine includes design and proven structural has excellent sightlines to the work area
several design features which enhance manufacturing techniques assure to help keep operator fatigue low and
performance, efficiency and reliability. outstanding durability in the toughest production up throughout the entire
pg. 4 applications. New grease lubricated shift. pg. 7
seals protect and prolong track life.
pg. 6

Hydraulics
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. pg. 5

Increased horsepower, better controllability,

extended service intervals and a redesigned
operator station increase your productivity
and lower your operating costs.

2
Front Linkage Buckets, Quick Coupler and Work Tools Serviceability
Designed-in flexibility to help bring Ex-CWTS available buckets, Longer service intervals and easier
higher production and efficiency to quick couplers, multi-grapples, shears, maintenance result in better machine
all jobs. pg. 8 and ex-CIPL available hammers – availability and lower owning and
to provide a total solution package operating costs. pg. 9
to the end-user. pg. 10

Complete Customer Support

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.

3
Engine
The four cylinder turbocharged Cat 3064 T engine is built for power, reliability, economy
and low emissions.

Torque Rise. The engine is designed for

high torque rise at middle rpm, a feature
that is especially beneficial for heavy-
duty use.
Cylinder Block. The cylinder block is
cast iron for improved wear resistance.
The upper part is laser hardened to
reduce oil consumption and internal
component wear.
Maintenance. The oil level gauge, oil
filter, fuel filter and priming pump are
located on the right side of the upper
structure for easy maintenance. The
engine oil filter and fuel filter change
intervals have been extended.
Crankshaft. The eight balance, one-
piece, forged crankshaft enhances
balance and decreases vibration and is
induction hardened to improve abrasion
resistance.
Pistons. Heat resistant aluminum alloy
pistons have a short compression
height, reducing weight and improving
efficiency.
Fuel Consumption. 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.
Air Intake Heating. Air intake heating is
standard on the 311C U for easier cold
starts.

4
Hydraulics
Caterpillar hydraulics deliver power and control to keep material moving at high volume.

Component Layout. The 311C U

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.
Hydraulic Cross Sensing System.
Improves productivity with faster
implement speeds and quicker, stronger
pivot turns.
Automatic Boom and Swing Priority.
For simpler operation, work mode and
power mode switches have been
eliminated. Instead, the automatic boom
and swing priority function selects the
best mode, based on joystick
movement.
Stackable Valves. Up to two additional
control valves can be added to the main
control valve of the 311C U to run
additional tools.
Controllability. The hydraulic system
offers precise control to the 311C U,
reducing operator fatigue, improving
operator effectiveness and efficiency,
which ultimately translates into
enhanced performance.
Auxiliary Hydraulic Valve. For further
versatility, a dedicated hammer (single
function), thumb (double function), and
combined auxiliary hydraulics are
offered on the 311C U.
Hydraulic Snubbers. 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.

5
Undercarriage and Structures
Durable undercarriage absorbs stresses and provides excellent stability.

505 mm 311C U
885 mm 312C
Main Frame. The rugged main frame is Shorter Tail Swing Radius.
designed for maximum durability and The 311C U, with its reduced tail swing
efficient use of materials. radius, is easier to operate while against
walls and in tight areas, reducing
Grease Lubricated Track. New grease
the concern of the rear of the machine
lubricated seals protect the track link
during operation.The shorter tail
and deliver long track link pin and
measurement allows flexibility for ideal
bushing inner wear life.
use in urban construction, logging
Carbody Design and Track Roller Travel Motors. Automatic speed roads, and other space restricted sites.
Frames. X-shaped, box-section carbody selection enables the machine to
provides excellent resistance to automatically change up and down from
torsional bending. Robot-welded track high and low speeds in a smooth,
roller frames are press-formed, controlled manner.
pentagonal units to deliver exceptional
Idler Guard. An idler guard, which is
strength and service life.
integral to the track roller frame is
Structures. The 311C U structural standard. This guard helps maintain
components and undercarriage are the track alignment while traveling or
backbone of the machine’s durability. working on slopes.
Rollers and Idlers. Sealed and Blades. For further versatility and to
lubricated track rollers, carrier rollers meet more general purposes needs,
and idlers provide excellent service life, three blade width options are available
to keep the machine in the field longer. on the 311C U.

6
Operator Station
Designed for simple operation, the 311C U operator station allows the operator to focus on
production.

Operator Environment. The 311C U

operator work station is quiet with
ergonomic control placement and
convenient adjustments, low lever and
pedal effort, ergonomic seat design and
highly efficient ventilation.
Monitor. The 311C U’s newly designed
and conveniently located monitor allows
the operator to monitor machine performance
while sitting in a comfortable position.
Automatic Boom and Swing Priority
Function. For simpler operation, work
mode and power mode switches have been
eliminated. Instead, the automatic boom
and swing priority function selects the best
mode, based on joystick movement.
Redesigned Layout. Redesigned cab layout
emphasizes simplicity and ease of use.
Right-hand wall and console provide easy
access to all switches, dials and controls.
Travel Controls. A large rubber-covered
footrest at the side of the travel pedals
allows the foot to easily grip the pedal.
The travel lever stroke and force have been
enhanced to improve the 311C U’s fine
controllability, making the machine easier
to operate.
Seat. A new seat with a two-tone color
offers two types of cushions - soft and firm
- for operator comfort. The reclining knob
is located at the right-side of the seat for
easier reclining adjustment.
Automatic Climate Control. Fully automatic
climate control adjusts temperature and
flow and determines which air outlet is best
in each situation.
Skylight. A large polycarbonate skylight
delivers excellent natural lighting and good
ventilation. Standard sliding sunshade
protects from direct sunlight.

7
Front Linkage
Designed-in flexibility to help bring higher production and efficiency to all jobs.

Front Linkage. Front linkage variations

on the 311C U allow for the use of
one boom and two sticks. Using these
combinations improves the general-
purpose versatility of the 311C U
by suiting it to a diverse range of
applications.
Boom. The boom on the 311C U is
designed to provide maximum digging
capability. Caterpillar booms are
manufactured with high-tensile steel for
upper, lower and side plates and robot
welded for consistent quality.
Stick. Two sticks are available on
the 311C U. The customer’s working
envelope and bucket capacity needs
determine their stick choice.
Boom and Stick Construction.
Built for performance and long service
life, Caterpillar booms and sticks are
large, welded, box-section structures
with thick, multi-plate fabrications in
high-stress areas.
Bucket Linkage. The bucket linkage on
the 311C U includes the bucket cylinder,
idler link and power links.
Linkage Bearings. New bearing
technology has extended the front
linkage greasing intervals for all
bearings.

8
Serviceability
Simplified service and maintenance features save you time and money.

Pump Compartment. A service door on

the right side of the upper structure
allows ground-level access to the pump
and pilot filter.
Capsule 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 “Punched-Star” Plate. Anti-
skid punched-star plate covers the
maintenance walkway to prevent
Extended Service Intervals. 311C U Air Filter Compartment. The air filter slipping. The plate can be removed for
service and maintenance intervals have features a double-element construction cleaning.
been extended to reduce machine for superior cleaning efficiency. When
Engine Inspection. The engine can be
service time and increase machine the air cleaner plugs, a red warning sign
accessed from the upper structure or
availability. appears on the indicator near the air
from under the machine. The engine
cleaner.
Radiator Compartment. The left rear and pump compartment are separated
service door allows easy access to the Ground Level Service. The design and by a steel wall.
engine radiator and the oil cooler. A layout of the 311C U was made with the
reserve tank and drain cock are attached service technician in mind. Many
to the radiator for simplified service locations are easily accessible at
maintenance. ground level allowing critical
maintenance to get done quickly and
efficiently.

9
Buckets, Quick Couplers and Work Tools
The 311C U has designed-in flexibility to help bring total solutions for efficiency
to your jobs.

Quick Couplers. Caterpillar Quick Couplers enable the Pin Grabber Plus Quick Coupler. This hydraulically controlled
operator to simply release one work tool and pick up another. Pin Grabber Plus quick coupler makes changing buckets and
Your hydraulic excavator becomes highly versatile. To suit other popular work tools simple and fast. The Pin Grabber Plus
your business and application needs, Caterpillar offers two coupler mounts to the end of the stick and allows buckets,
different types of Quick Couplers. clamshells and other work tools to be used with little or no
modification.
CW-Series Dedicated Quick Coupler. The dedicated CW-
Each model fully adjusts to different pin
Series quick coupler enables a quick tool exchange while
spreads of various tools regardless of
maintaining top machine performance. It is available in a
manufacturer – it is the only coupler
hydraulic and spindle version.
that accommodates a wide range of

The hydraulic version is available in a standard
work tool makes and models.
and a narrow version and makes it very easy
Pin-on assembly makes coupler
for the operator to switch tools without
installation and removal fast and easy.
having to leave the cab.
Coupler retains the same bucket opening and closing angles.

The spindle version is a user-

Buckets can be reversed for greater flexibility when working
friendly mechanical version that can
around and under obstructions.
later be easily converted into the

Integrated lift eye.
hydraulic version if required. The spindle
version is also available in the narrow and Quick Coupler hydraulic Circuits for CAT 308C CR are available
standard version. as retrofit kits. Caterpillar offers two kits that are dedicated to

A lifting hook is added to the dedicated Quick Coupler CW and Pin Grabber Plus coupler. Ask your Cat dealer for more
for maximum lift capacity. specific information.

Buckets. A wide variety of buckets help optimize Work Tools. Work Tools for 311C U are
machine performance. Purpose designed and only available ex Caterpillar Work Tools &
built to Caterpillar’s high durability Services (NL) and ex Caterpillar Impact
standards. Products Ltd. (UK). For any specific work
tools needs not covered in machine price list
Excavation Bucket. Digs and loads soft
please contact your local dealer.
to medium materials such as clay and earth.
Features weld on tip adapters, hardened cutting Shear. Caterpillar's steel cutting shear meets
edge and side bars. your requirements in scrap recycling as well as
primary demolition and offers excellent flexibility.
Extreme Excavation Bucket. Digs and loads
compact/abrasive materials like earth/rock, Multi-Grapple. The Multi-Grapple is the ideal tool for stripping,
sand/clay, sand/gravel, coal, chalk and low sorting, handling and loading.
abrasion ores. Features abrasion resistant steel
Hammer. The Cat hammers provide the perfect match for
for all wear parts.
maximal life, efficiency and productivity.
Ditch Cleaning Bucket. Wide, light bucket
used mainly with long reach configurations
to clean waterbeds and banks.

Bucket Specifications
Contact your Caterpillar dealer for special bucket requirements.

Excavation Extreme
Excavation
A Bite width mm 600 750 900 1000 1100 1200 1200
B Tip radius mm 1230 1230 1230 1230 1230 1230 1230
Capacity m3 280 380 485 560 640 715 715
Weight kg 316 336 375 397 430 453 463 ➤ A ➤ ➤ B ➤
Engine Hydraulic System Cab/FOGS
Caterpillar 3064 T turbocharged
diesel engine. Main Implement System Optional Falling Object Guard System
Maximum Flow (2x) 108 l/min is designed to protect the operator from
Ratings at 1950 rpm kW hp falling objects, and is certified under
Maximum pressure
Gross power 61 82 ISO 10262 specifications.
Implements 29 900 kPa
Flywheel power 59 79
Travel 34 300 kPa
Net power
Swing 23 500 kPa
ISO 9249 59 79
Pilot System
EEC 80/1269 59 79
Maximum flow 24.3 l/min Sound
Dimensions Maximum pressure 4120 kPa
Bore 102 mm Blade System Operator Sound
Stroke 130 mm Maximum flow 53.2 l/min
The operator sound level measured
Displacement 4.25 liters Maximum pressure 20 594 kPa according to the procedures specified
Power rating conditions Boom Cylinder in ISO 6396 is 74 dB(A), for cab

net power advertised is the power Bore 100 mm offered by Caterpillar, when properly
available at the flywheel when the installed and maintained and tested
Stroke 1002 mm
engine is equipped with fan, air with the doors and windows closed.
Stick Cylinder
cleaner, muffler, and alternator Exterior Sound

no engine derating required below
Bore 110 mm
The labeled spectator sound power

1500 m altitude Stroke 1194 mm level measured according to the test

Meets Stage II EU Emission Bucket Cylinder procedures and conditions specified
Directive 97/68/EC. Bore 100 mm in 2000/14/EC is 103 dB(A).
Stroke 939 mm

Drive Swing Mechanism Service Refill Capacities

Maximum travel speed 5.6 km/h Swing Torque 31 kNm Liters

Maximum drawbar pull 92 kN Swing Speed 10.6 rpm Fuel Tank 195
Cooling System 17.5
Engine Oil 19.5
Swing Drive 3
Final Drive (each) 3
Hydraulic system(including tank) 160
Hydraulic tank 92

Operating Weights Undercarriage

Stick length 2250 mm 2800 mm Ground Pressure

Standard kg kg Standard
500 mm triple grouser 11 940 11 980 500 mm triple grouser 41 kPa
Optional Optional
600 mm triple grouser 12 160 12 200 600 mm triple grouser 35 kPa
700 mm triple grouser 12 390 12 430 700 mm triple grouser 31 kPa
770 mm triple grouser 12 510 12 550 770 mm triple grouser 28 kPa
Blade: add 830 830

311C U specifications 11
Dimensions
All dimensions are approximate.

6
4 7
5 8

mm mm mm mm
Stick Length 2250 2800 Stick Length 2250 2800
1 Shipping height 2770 2770 7 Track gauge 1990 1990
2 Shipping length 6910 6920 8 Transport width
3 Tail swing radius 1750 1750 500 mm shoe 2490 2490
4 Length to centers of rollers 2610 2610 600 mm shoes 2590 2590
5 Track length 3320 3320 700 mm shoes 2690 2690
6 Ground clearance 455 455 770 mm shoes 2760 2760

Working Ranges with One-Piece Boom (4300 mm)

m

Stick Length mm 2250 2800

8
1 Maximum digging depth mm 5040 5590
➤

7 2 Maximum reach at ground level mm 7570 8100

6 3 Maximum cutting height mm 7805 8125
4 Maximum loading height mm 5450 5770
➤

5
3 5 Minimum loading height mm 1880 1340
4
6 Maximum depth cut
3 4 for 2440 mm Level Bottom mm 4425 4940
2 7 Maximum vertical wall digging depth mm 4815 5440
➤

Digging forces (SAE):

1 5
Stick kN 58 50
➤➤

0
➤

➤
2
➤ Bucket kN 80 80
1
7 2250 mm
2 2800 mm
1 6
3

4
➤

➤
➤

6
9 8 7 6 5 4 3 2 1 0 1 m

12 311C U specifications
 Lift capacities with One-Piece Boom (4300 mm)
All weights are in kg

Medium Stick – 2250 mm 1.5 m 3.0 m 4.5 m 6.0 m 7.5 m

Shoes – 500 mm m
Bucket – 0.4 m3
6.0 m *2500 *2500 *1050 *1050 5.9
Blade up
4.5 m *2650 *2650 *1000 *1000 6.9
3.0 m *4150 *4150 *3200 2950 2250 1800 *1000 *1000 7.3
1.5 m *6200 5200 3450 2750 2150 1750 *1050 *1050 7.4
Ground *6450 4850 3300 2600 2100 1650 *1200 *1200 7.1
–1.5 m *4900 *4900 6400 4750 3200 2550 *1550 1550 6.3
–3.0 m *8600 *8600 *6150 4850 3250 2600 *2350 *2350 4.9

Medium stick – 2250 mm 1.5 m 3.0 m 4.5 m 6.0 m 7.5 m

Shoes – 500 mm m
Bucket – 0.4 m3
6.0 m *2500 *2500 *1050 *1050 5.9
Blade down
4.5 m *2650 *2650 *1000 *1000 6.9
3.0 m *4150 *4150 *3200 2950 *2850 1800 *1000 *1000 7.3
1.5 m *6200 5200 *3950 2750 *3100 1750 *1050 *1050 7.4
Ground *7250 4850 *4550 2600 *3350 1650 *1200 *1200 7.1
–1.5 m *4900 *4900 *7150 4750 *4650 2550 *1550 1550 6.3
–3.0 m *8600 *8600 *6150 4850 *3950 2600 *2350 *2350 4.9

Long stick – 2800 mm 1.5 m 3.0 m 4.5 m 6.0 m 7.5 m

Shoes – 500 mm m
Bucket – 0.3 m3
6.0 m *850 *850 6.6
Blade up
4.5 m *2100 1900 *800 *800 7.4
3.0 m *2800 *2800 2300 1850 *800 *800 7.9
1.5 m *5450 5400 3550 2800 2200 1750 *850 *850 7.9
Ground *6950 4900 3300 2600 2100 1650 *1000 *1000 7.7
–1.5 m *4250 *4250 *6350 4750 3200 2500 2050 1600 *1200 *1200 7.0
–3.0 m *7000 *7000 *6400 4750 3200 2500 *1750 *1750 5.7
–4.5m *4600 *4600 *3400 *3400 3.8

Long stick – 2800 mm 1.5 m 3.0 m 4.5 m 6.0 m 7.5 m

Shoes – 500 mm m
Bucket – 0.3 m3
6.0 m *850 *850 6.6
Blade down
4.5 m *2100 1900 *800 *800 7.4
3.0 m *2800 *2800 *2550 1850 *800 *800 7.9
1.5 m *5450 5400 *3650 2800 *2900 1750 *850 *850 7.9
Ground *6950 4900 *4350 2600 *3250 1650 *1000 *1000 7.6
–1.5 m *4250 *4250 *7300 4750 *4650 2500 *3350 1600 *1200 *1200 7.0
–3.0 m *7000 *7000 *6650 4750 *4300 2500 *1750 *1750 5.7
–4.5m *4600 *4600 *3400 *3400 3.8

Load Point Height Load Radius Over Front Load Radius Over Side Load at Maximum Reach
* Limited by hydraulic rather than tipping load.
The above loads are in compliance with hydraulic excavator lift capacity ratings standard ISO/DIS 10567, they do not exceed 87% of hydraulic lifting capacity
or 75% of tipping capacity. Weight of all lifting accessories must be deducted from the above lifting capacities.

311C U specifications 13
 Lift capacities with One-Piece Boom (4300 mm)
All weights are in kg

Medium Stick – 2250 mm 1.5 m 3.0 m 4.5 m 6.0 m 7.5 m

Shoes – 700 mm m
Bucket – 0.4 m3
6.0 m *2500 *2500 *1050 *1050 5.9
Blade up
4.5 m *2650 *2650 *1000 *1000 6.9
3.0 m *4150 *4150 *3200 3050 2300 1850 *1000 *1000 7.3
1.5 m *6200 5400 3600 2850 2250 1800 *1050 *1050 7.4
Ground 6700 5000 3400 2700 2150 1750 *1200 *1200 7.1
–1.5 m *4900 *4900 6600 4950 3350 2650 *1550 *1550 6.3
–3.0 m *8600 *8600 *6150 5050 3400 2700 *2350 *2350 4.9

Medium stick – 2250 mm 1.5 m 3.0 m 4.5 m 6.0 m 7.5 m

Shoes – 700 mm m
Bucket – 0.4 m3
6.0 m *2500 *2500 *1050 *1050 5.9
Blade down
4.5 m *2650 *2650 *1000 *1000 6.9
3.0 m *4150 *4150 *3200 3050 *2850 1850 *1000 *1000 7.3
1.5 m *6200 5400 *3950 2850 *3100 1800 *1050 *1050 7.4
Ground *7250 5000 *4550 2700 *3350 1750 *1200 *1200 7.1
–1.5 m *4900 *4900 *7150 4950 *4650 2650 *1550 *1550 6.3
–3.0 m *8600 *8600 *6150 5050 *3950 2700 *2350 *2350 4.9

Long stick – 2800 mm 1.5 m 3.0 m 4.5 m 6.0 m 7.5 m

Shoes – 700 mm m
Bucket – 0.3 m3
6.0 m *850 *850 6.6
Blade up
4.5 m *2100 1950 *800 *800 7.4
3.0 m *2800 *2800 2350 1900 *800 *800 7.9
1.5 m *5450 *5450 *3650 2900 2250 1850 *850 *850 7.9
Ground 6800 5100 3450 2700 2200 1750 *1000 *1000 7.7
–1.5 m *4250 *4250 6600 4900 3300 2600 2150 1700 *1200 *1200 7.0
–3.0 m *7000 *7000 6650 4950 3350 2600 *1750 *1750 5.7
–4.5m *4600 *4600 *3400 *3400 3.8

Long stick – 2800 mm 1.5 m 3.0 m 4.5 m 6.0 m 7.5 m

Shoes – 700 mm m
Bucket – 0.3 m3
6.0 m *850 *850 6.6
Blade down
4.5 m *2100 1950 *800 *800 7.4
3.0 m *2800 *2800 *2550 1900 *800 *800 7.9
1.5 m *5450 *5450 *3650 2900 *2900 1850 *850 *850 7.9
Ground *6950 5100 *4350 2700 *3250 1750 *1000 *1000 7.7
–1.5 m *4250 *4250 *7300 4900 *4650 2600 *3350 1700 *1200 *1200 7.0
–3.0 m *7000 *7000 *6650 4950 *4300 2600 *1750 *1750 5.7
–4.5m *4600 *4600 *3400 *3400 3.8

Load Point Height Load Radius Over Front Load Radius Over Side Load at Maximum Reach
* Limited by hydraulic rather than tipping load.
The above loads are in compliance with hydraulic excavator lift capacity ratings standard ISO/DIS 10567, they do not exceed 87% of hydraulic lifting capacity
or 75% of tipping capacity. Weight of all lifting accessories must be deducted from the above lifting capacities.

14 311C U specifications
Standard Equipment
Standard and optional equipment may vary. Consult your Caterpillar dealer for specifics.

Alternator, 50 amp Cab: Doors and caps lock with one-key

Automatic swing brake AM/FM radio, 24-volt security system
Automatic work modes Ashtray with cigar lighter Mirrors (frame and cab)
Auxiliary hydraulic valve (1) Drink holder Power Train:
Bolt-on Falling Objects Guard System Floor mat 24-volt electric starting
(FOGS) capability Horn Air intake heater
Boom, one piece Hydraulic neutralizer lever for all Cat 3064 T diesel engine
controls One touch low idle
Instrument panel and gauges Water separator
Joysticks, adjustable pilot-operated Undercarriage:
Light, box mounted (1) 500 mm triple grouser shoes
Lighting, interior Hydraulic track adjusters
Literature holder Idler section track guiding guards
Openable front windshield Track-type undercarriage with
Openable skylight grease lubricated
Suspension seat
Travel control pedals with
hand levers

Optional Equipment
Optimal equipment may vary. Consult your Caterpillar dealer for specifics.

Air conditioner Cold weather start Right-side boom lights

Auxiliary hydraulic lines Falling Objects Guard System Stick lowering check valve
for boom and sticks Guard track guiding Sticks
Blades Headrest 2800 mm stick
2500 mm, with replaceable cutting edges Heavy-duty bottom guard 2250 mm stick
for 500 mm triple grouser shoes Hydraulic arrangements, auxiliary: Swivel guard
2600 mm, with replaceable cutting edges single-function capability Tracks
for 600 mm triple grouser shoes double-function capability 600 mm triple grouser
2700 mm, with replaceable cutting edges combined single and double 700 mm triple grouser
for 700 mm and 770 mm function capability 770 mm triple grouser
triple grouser shoes Medium pressure hydraulic 500 mm segment rubber track
Boom lowering check valve arrangement Track guiding guard, center
Bucket linkage Power supply 12V-5A Travel alarm
Cab mounted working lights Rain protector Vandalism protection

311C U specifications 15
311C U Hydraulic Excavator

Materials and specifications are subject to change without notice. www.CAT.com

Featured machines in photos may include additional equipment. © 2005 Caterpillar
HEHH3070 (3/2005) hr See your Caterpillar dealer for available options. All Rights Reserved