Engine ModelMitsubishi S3Q2Mitsubishi S3Q2-TMitsubishi S4Q2Mitsubishi S4Q2-T
Net Power (ISO 9249)22 kW (30 hp)29 kW (39 hp)31 kW (42 hp)35 kW (47 hp)
Weights
Operating Weight with Canopy3540 kg (7,800 lb)3855 kg (8,500 lb)4995 kg (11,012 lb)5305 kg (11,696 lb)
Operating Weight with Cab3700 kg (8,160 lb)4015 kg (8,852 lb)5155 kg (11,365 lb)5465 kg (12,048 lb)
Operating Specifications
Maximum Dig Depth3180 mm (10'4")3430 mm (11'3")3670 mm (12'1")3870 mm (12'8")
Page 2
Features
Comfortable Operation
Spacious operator station provides a comfortable
working environment with easy-to-use, fingertip
controls for the boom swing and auxiliary
hydraulic functions.
Compact Radius Design
The machine’s compact design lets you work
easily in confined areas. New to the D-Series,
the 303.5DCR and the 304D CR feature a zero
tail swing (ZTS) design, keeping the radius of the
upper body within the width of the undercarriage.
Superior Performance
High digging forces and fast cycle times boost
your productivity. All four models feature a closedcenter, load-sensing hydraulic system providing
smooth, powerful performance and increased
fuelefficiency.
Work Tools
Increase the versatility of your machine with
Cat®Work Tools.
Durable Undercarriage
Rubber track undercarriage allows you to work
on multiple surfaces without damaging either
the surface or the machine. Steel tracks and
steel tracks with rubber pads are also available
depending on your application.
Contents
Operator Station ..................................................3
The Cat® D-Series Mini Hydraulic Excavators deliver
high performance in a compact size to help you work in
the tightest applications. All four models feature a large,
integrated counterweight and improved stability while
maintaining a compact radius design. Spacious operator
station and ergonomic, easy-to-use controls keep you
comfortable throughout the work day. Powerful digging
forces, fast cycle times and increased stability lead to
more production, helping you get more done and improve
your bottom line.
2
Page 3
Operator Station
Superior comfort to keep you productive throughout the work day.
Comfortable Working Environment
Spacious and comfortable operator station with excellent
visibility and legroom keeps the operator comfortable and
reduces fatigue. Standard features include:
• Reclining suspension seat with adjustable wrist rests.
• Pilot operated controls on all services including travel
levers and dozer functions.
• Two post canopy design for better visibility to the
workarea.
• A pattern control changer (not available in all regions)
isaccessible from the cab to switch between excavator
and backhoe style controls.
• Ample storage space under the seat that can be locked
for added security.
Optional Enclosed Cab
For even greater operator comfort, an enclosed cab
isavailable as an option and features:
• Sealed cab with heat and optional air conditioning
tokeep you comfortable in a wide range of conditions.
• Radio ready with speakers and easy radio installation.
• Removable lower front window and sliding windows
forexcellent overall visibility.
• Gas assisted front window slides up with minimal effort.
• Sliding door system offers good access and maintains
the machine’s compact dimensions, reducing the risk
ofdamage.
Joystick Controls
The boom swing and auxiliary hydraulic functions are
located at your ngertips providing smooth, easy operation.
These joystick mounted controls deliver more productivity
through precise movement of the boom swing and auxiliary
functions. They also eliminate foot pedals and free up the
oor for more room for the operator’s feet.
100% pilot controls provide consistent ow and pressure
throughout the life of the machine. This also allows
allcontrols to be locked out while starting the machine
andwhen the safety lockout bar is in the up position.
3
Page 4
Performance
Powerful digging with precise control.
Stability
All four D-Series models feature increased stability over
the previous series, while maintaining the compact radius
design. This increased stability leads to more productivity
and versatility through the use of heavier work tools and
theoptional long stick.
Fast, Powerful Digging with Load Sensing Hydraulics
High digging forces and fast cycle times deliver the productivity
that your job demands. Load sensing hydraulics optimize
ow for smooth, powerful performance and increased
fuelefciency.
Engine
High performance power train provides optimized engine
horsepower and strong performance. Engine meets U.S. EPA
Tier 4 Interim and EU Stage IIIA emissions requirements.
Automatic engine idle automatically lowers engine revolutions
when not in use to conserve fuel and lower environmental
noise and emissions. The D-Series models feature an engine
kill switch conveniently located in the cab and accessible
from ground level.
Automatic Two Speed
With the standard automatic two speed feature, the machine
will automatically balance high speed and torque travel
requirements based on the conditions to give the operator
the optimum speed and control. The machine can be put in
low gear if slower travel is desired while in tight conditions.
200 Degree Bucket Rotation
Industry leading bucket rotation of over 200 degrees
provides greater material retention during truck loading.
Italso allows for easier vertical wall digging without having
to reposition the machine.
4
Page 5
Compact Radius, Zero Tail Swing
Work in the tightest areas.
Compact Radius
The compact radius design gives greater machine versatility and the capability to work within conned
areas. This allows the operator to concentrate on the work being done without having to worry about
damaging the back of the machine or other job site obstacles. On the 305D CR and the 305.5D CR,
theupper body stays within 140 mm (5.5 in) of the undercarriage.
Zero Tail Swing
New to the D-Series, the 303.5D CR and the 304D CR models feature a zero tail swing design. On these
models, the radius of the upper body stays entirely within the width of the undercarriage.
5
Page 6
Coupler and Work Tool Options
New coupler design and multiple work tools increase versatility.
Couplers
The D-Series couplers have a new design with a choice
of either a mechanical pin-grabber or the new hydraulic
pin-grabber quick coupler option. The new design uses a
wedge to keep the tool secure to the coupler, reducing wear
and maintaining a tight t through the life of the coupler.
Thenew hydraulic coupler option allows the operator
to change tools without leaving the comfort ofthecab.
Hydraulic quick coupler lines are available from the
factoryas an option.
Wide Range of Work Tools
A wide range of Cat Work Tools have been designed
specically for the Cat Mini Hydraulic Excavators to maximize
machine performance. Available work tools include:
• Buckets (heavy duty and heavy duty capacity)
• Tilting, Ditch Cleaning Buckets
• Hydraulic Hammers
• Augers
• Thumbs (not available in all regions)
• Vibratory Compactors
• Shears (boom mounted on 305D CR/305.5D CR only)
• Quick Coupler
Standard Thumb Ready Sticks (optional in Europe)
Machines come standard with stick mounted brackets, ready
to t a hydraulic thumb for even greater machine versatility.
A factory installed bracket and relief valve make hydraulic
thumb installation simple and cost-effective.
Standard Auxiliary Lines and Accumulator
One-way and two-way auxiliary lines (combined function),
including quick connections, are tted as standard equipment
so the machine comes ready to work. A standard accumulator
allows for auxiliary pressure to be released, making connecting
and disconnecting work tools safer and easier.
6
Page 7
Dozer Blade
Standard dozer blade maximizes productivity.
Simple Dozer Control with Float Function
The dozer function is pilot controlled from inside the cab, providing smooth,
proportional operation. The standard oat function is enabled by pushing the
leverfully forward into the detent position. Cleanup and backlling is easier
sincethe operator does not have to adjust the blade height during travel.
Excellent Blade Visibility
Visibility to the blade is excellent in any position, allowing the blade to be
positioned behind the operator and away from the front linkage for better
accesswhen back dragging and nishing in tight areas.
Angle Blade Option
Increase machine versatility with the Cat angle dozer blade. Built for strength
anddurability, the hydraulic angle blade features a hardened steel wear edge and
good protection to cylinders and hydraulic lines. The angle blade can be positioned
straight ahead or angled up to 25 degrees to the left or right. This reduces the
number of times required to back up and reposition when backlling so you can
nish the job faster. All functions of the blade are controlled with one joystick
using a proportional roller switch for the angle function.
Undercarriage
Stability and durability.
Rubber Track
The standard rubber track lets you
work on multiple surfaces such as
grass, pavement or stone without
damaging the surface or machine.
Steel Track Option
Optional steel track is available
for harsh conditions such as
demolition. The extra weight of
the steel tracks generally provides
better stability when digging
over the side of the machine.
(Notavailable on the 304D CR.)
Rubber Pads
Optional rubber pads can be
attached to the steel track to
prevent damage to paved surfaces
and minimize noise and vibration
during travel with the steel track
system. This option provides
themaximum overall stability.
7
Page 8
Serviceability
Simplified service and maintenance save you time and money.
Easy Service
Convenient service features make maintenance easy, reducing
your downtime:
• Lifting side hood allows access to air lter, main
implement valve, 1-way/2-way auxiliary ow selector,
accumulator, fuel lter and hydraulic tank. This eliminates
the need to lift the cab when maintaining and servicing
the machine.
• Swing out rear door provides access to major components
and service points including engine oil check and
ll, vertically mounted engine oil lter, starter motor
andalternator.
• Easy access to the radiator and oil cooler results in
simplied cleaning and reduced maintenance times.
• 500 hour engine oil and lter change period reduces
operating costs and machine downtime.
Customer Support
Support you can count on.
Superior Dealer Services
Your Cat dealer is ready to assist you with your purchase
decision and everything after.
• Financing packages are exible to meet your needs.
• Unmatched parts availability keeps you working.
• Make comparisons of machines, with estimates of
component life, preventative maintenance and cost
ofproduction.
• Your Cat dealer can evaluate the cost to repair,
rebuild and replace your machine.
• For more information on Cat products, dealer
services and industry solutions, visit www.cat.com.
8
Page 9
303.5D CR, 304D CR, 305D CR and 305.5D CR Specifications
Engine
Engine Model
303.5D CR Mitsubishi S3Q2
304D CR Mitsubishi S3Q2-T
305D CR Mitsubishi S4Q2
305.5D CR Mitsubishi S4Q2-T
Rated Net Power (ISO 9249)
303.5D CR 22 kW 30 hp
304D CR 29 kW 39 hp
305D CR 31 kW 42 hp
305.5D CR 35 kW 47 hp
Gross Power
303.5D CR 23.2 kW 31 hp
304D CR 30.2 kW 41 hp
305D CR 32.2 kW 43 hp
305.5D CR 36.2 kW 49 hp
Bore 88 mm 3.5 in
Stroke 103 mm 4.1 in
Displacement
303.5D CR/
304D CR
305D CR/
305.5D CR
1.9 L 116 in
2.5 L 153 in
Weights *
Travel System
Travel Speed – High
303.5D CR/
304D CR
305D CR/
305.5D CR
Travel Speed – Low
303.5D CR/
304D CR/305D CR
305.5D CR 2.8 km/h 1.8 mph
Maximum Traction Force – High Speed
303.5D CR 17.0 kN 3,820 lb
304D CR 16.8 kN 3,777 lb
305D CR 24.0 kN 5,395 lb
305.5D CR 26.8 kN 6,025 lb
Maximum Traction Force – Low Speed
303.5D CR 31.0 kN 6,970 lb
304D CR 30.8 kN 6,924 lb
305D CR 45.2 kN 10,161 lb
3
3
305.5D CR 47.8 kN 10,745 lb
Ground Pressure
303.5D CR 30.4 kPa 4.4 psi
304D CR 29.6 kPa 4.3 psi
305D CR 28.5 kPa 4.1 psi
305.5D CR 30.2 kPa 4.4 psi
4.7 km/h 2.9 mph
4.6 km/h 2.8 mph
2.7 km/h 1.7 mph
Service Re ll Capacities
Cooling System
303.5D CR/
304D CR
305D CR/
305.5D CR
Engine Oil
303.5D CR/
304D CR
305D CR/
305.5D CR
Fuel Tank
303.5D CR 45 L 11.9 gal
304D CR 51 L 13.5 gal
305D CR/
305.5D CR
Hydraulic Tank
303.5D CR/
304D CR
305D CR/
305.5D CR
Hydraulic System
303.5D CR/
304D CR
305D CR/
305.5D CR
5.3 L 1.4 gal
10.7 L 2.8 gal
5.7 L 1.5 gal
8.2 L 2.2 gal
70 L 18.5 gal
33 L 8.7 gal
48 L 12.7 gal
65 L 17.2 gal
78 L 20.6 gal
Operating Weight with Canopy
303.5D CR 3540 kg 7,800 lb
304D CR 3855 kg 8,500 lb
305D CR 4995 kg 11,012 lb
305.5D CR 5305 kg 11,696 lb
Operating Weight with Cab
303.5D CR 3700 kg 8,160 lb
304D CR 4015 kg 8,852 lb
305D CR 5155 kg 11,365 lb
305.5D CR 5465 kg 12,048 lb
* Weight includes rubber tracks, bucket,
operator, full fuel and auxiliary lines.
9
Page 10
303.5D CR, 304D CR, 305D CR and 305.5D CR Specifications
Hydraulic System **
Pump Flow at 2,400 rpm
303.5D CR/
304D CR
305D CR 120 L/min 31.7 gal/min
305.5D CR 130 L/min 34.3 gal/min
Operating Pressure
– Equipment
Operating Pressure
– Travel
Operating Pressure – Swing
303.5D CR 172 bar 2,495 psi
304D CR 185 bar 2,683 psi
305D CR 185 bar 2,690 psi
305.5D CR 185 bar 2,695 psi
Auxiliary Circuit – Primary
(186 bar/2,734 psi)
303.5D CR/
304D CR
305D CR/
305.5D CR
Auxiliary Circuit – Secondary
(174 bar/2,524 psi)
303.5D CR/
304D CR
305D CR/
305.5D CR
Digging Force – Stick (standard)
303.5D CR 18.9 kN 4,250 lb
304D CR 21.6 kN 4,860 lb
305D CR 24.7 kN 5,550 lb
305.5D CR 28.9 kN 6,500 lb
Digging Force – Stick (long)
303.5D CR 16.9 kN 3,799 lb
304D CR 19.5 kN 4,385 lb
305D CR 21.3 kN 4,788 lb
305.5D CR 24.8 kN 5,575 lb
Digging Force – Bucket
303.5D CR 33.0 kN 7,420 lb
304D CR 37.8 kN 8,500 lb
305D CR 44.7 kN 10,050 lb
305.5D CR 50.9 kN 11,445 lb
** Load sensing hydraulics with variable
displacement piston pump.
88 L/min 23.2 gal/min
245 bar 3,553 psi
245 bar 3,553 psi
60 L/min 15.9 gal/min
70 L/min 18.5 gal/min
27 L/min 7.2 gal/min
35 L/min 9.3 gal/min
Swing System
Machine Swing
Speed
Boom Swing – Left (without stop)
303.5D CR/
305D CR/
305.5D CR
304D CR 70°
Boom Swing – Left (with stop)
303.5D CR/
304D CR
305D CR/
305.5D CR
Swing – Right 50°
9 rpm
80°
55°
60°
Blade
Width
303.5D CR 1780 mm 70.0 in
304D CR 1950 mm 76.8 in
305D CR/
305.5D CR
Height
303.5D CR/
304D CR
305D CR/
305.5D CR
Dig Depth
303.5D CR/
304D CR
305D CR/
305.5D CR
Lift Height
303.5D CR/
304D CR
305D CR/
305.5D CR
1980 mm 78.0 in
325 mm 12.8 in
375 mm 14.8 in
470 mm 18.5 in
555 mm 21.9 in
400 mm 15.8 in
405 mm 15.9 in
10
Page 11
Dimensions – 303.5D CR
Standard Stick Long Stick Standard Stick Long Stick
2880 mm 9'6" 3180 mm 10'4"
1
2320 mm 7'8" 2470 mm 8'2"
2
5060 mm 16'8" 5320 mm 17'6"
3
5200 mm 17'1" 5440 mm 17'10"
4
4920 mm 16'2" 5030 mm 16'6"
5
3520 mm 11'6" 3640 mm 11'11"
6
2060 mm 6'9" 2180 mm 7'2"
7
890 mm 2'11" 890 mm 2'11"
8
400 mm 1'4" 400 mm 1'4"
9
470 mm 1'7" 470 mm 1'7"
10
1420 mm 4'8" 1650 mm 5'4"
11
2500 mm 8'2" 2500 mm 8'2"
12
565 mm 1'10" 565 mm 1'10"
13
2220 mm 7'3" 2220 mm 7'3"
14
4730 mm 15'6" 4790 mm 15'9"
15
765 mm 2'6" 765 mm 2'6"
16
670 mm 2'2" 670 mm 2'2"
17
300 mm 1'0" 300 mm 1'0"
18
1780 mm 5'10" 1780 mm 5'10"
19
Lift Capacities at Ground Level *
Lift Point Radius 3000 mm (9'8") 4000 mm (13'1")
Front Side Front Side
Blade Down kg
lb
Blade Up kg
lb
* The above loads are in compliance with hydraulic excavator lift capacity rating standard ISO 10567:2007 and they do not exceed 87% of hydraulic lifting capacity
or 75% of tipping capacity. The excavator bucket weight is not included on this chart. Lifting capacities are for standard stick.
1450850960570
3,1971,8742,1161,257
870790580530
1,9181,7421,2791,168
11
Page 12
303.5D CR, 304D CR, 305D CR and 305.5D CR Specifications
Dimensions – 304D CR
Standard Stick Long Stick Standard Stick Long Stick
3130 mm 10'3" 3430 mm 11'3"
1
2420 mm 8'0" 2560 mm 8'5"
2
5220 mm 17'1" 5470 mm 18'0"
3
5350 mm 17'7" 5590 mm 18'4"
4
4980 mm 16'5" 5070 mm 16'8"
5
3590 mm 11'9" 3690 mm 12'1"
6
2110 mm 6'11" 2220 mm 7'3"
7
975 mm 3'2" 975 mm 3'2"
8
400 mm 1'4" 400 mm 1'4"
9
470 mm 1'7" 470 mm 1'7"
10
1480 mm 4'10" 1770 mm 5'9"
11
2500 mm 8'2" 2500 mm 8'2"
12
565 mm 1'10" 565 mm 1'10"
13
2220 mm 7'3" 2220 mm 7'3"
14
4820 mm 15'10" 4930 mm 16'2"
15
735 mm 2'5" 735 mm 2'5"
16
670 mm 2'2" 670 mm 2'2"
17
350 mm 1'1" 350 mm 1'1"
18
1950 mm 6'5" 1950 mm 6'5"
19
Lift Capacities at Ground Level *
Lift Point Radius 3000 mm (9'8") 4000 mm (13'1")
Front Side Front Side
Blade Down kg
lb
Blade Up kg
lb
* The above loads are in compliance with hydraulic excavator lift capacity rating standard ISO 10567:2007 and they do not exceed 87% of hydraulic lifting capacity
or 75% of tipping capacity. The excavator bucket weight is not included on this chart. Lifting capacities are for standard stick.
168010801120720
3,7042,3812,4691,587
980990650660
2,1602,1831,4331,455
12
Page 13
Dimensions – 305D CR
Standard Stick Long Stick Standard Stick Long Stick
3280 mm 10'9" 3670 mm 12'1"
1
2320 mm 7'7" 2630 mm 8'8"
2
5430 mm 17'10" 5810 mm 19'1"
3
5600 mm 18'5" 5960 mm 19'7"
4
5250 mm 17'3" 5440 mm 17'10"
5
3720 mm 12'2" 3920 mm 12'10"
6
2350 mm 7'8" 2530 mm 8'3"
7
1100 mm 3'7" 1100 mm 3'7"
8
405 mm 1'4" 405 mm 1'4"
9
555 mm 1'10" 555 mm 1'10"
10
1750 mm 5'9" 2150 mm 7'0"
11
2550 mm 8'4" 2550 mm 8'4"
12
615 mm 2'0" 615 mm 2'0"
13
2580 mm 8'5" 2580 mm 8'5"
14
5180 mm 17'0" 5290 mm 17'4"
15
785 mm 2'7" 785 mm 2'7"
16
695 mm 2'3" 695 mm 2'3"
17
400 mm 1'4" 400 mm 1'4"
18
1980 mm 6'6" 1980 mm 6'6"
19
Lift Capacities at Ground Level *
Lift Point Radius 3000 mm (9'8") 4500 mm (14'9")
Front Side Front Side
Blade Down kg
lb
Blade Up kg
lb
* The above loads are in compliance with hydraulic excavator lift capacity rating standard ISO 10567:2007 and they do not exceed 87% of hydraulic lifting capacity
or 75% of tipping capacity. The excavator bucket weight is not included on this chart. Lifting capacities are for standard stick.
242013401370760
5,3352,9543,0201,675
15801200880690
3,4832,6451,9401,521
13
Page 14
303.5D CR, 304D CR, 305D CR and 305.5D CR Specifications
Dimensions – 305.5D CR
Standard Stick Long Stick Standard Stick Long Stick
3470 mm 11'4" 3870 mm 12'8"
1
2330 mm 7'8" 2730 mm 9'0"
2
5630 mm 18'6" 6020 mm 19'9"
3
5790 mm 19'0" 6170 mm 20'3"
4
5330 mm 17'6" 5590 mm 18'4"
5
3820 mm 12'7" 4080 mm 13'4"
6
2400 mm 7'10" 2530 mm 8'3"
7
1130 mm 3'8" 1130 mm 3'8"
8
405 mm 1'4" 405 mm 1'4"
9
555 mm 1'10" 555 mm 1'10"
10
1740 mm 5'8" 2150 mm 6'11"
11
2550 mm 8'4" 2550 mm 8'4"
12
615 mm 2'0" 615 mm 2'0"
13
2580 mm 8'6" 2580 mm 8'6"
14
5330 mm 17'6" 5460 mm 17'10"
15
785 mm 2'7" 785 mm 2'7"
16
695 mm 2'3" 695 mm 2'3"
17
400 mm 1'4" 400 mm 1'4"
18
1980 mm 6'6" 1980 mm 6'6"
19
Lift Capacities at Ground Level *
Lift Point Radius 3000 mm (9'8") 4500 mm (14'9")
Front Side Front Side
Blade Down kg
lb
Blade Up kg
lb
* The above loads are in compliance with hydraulic excavator lift capacity rating standard ISO 10567:2007 and they do not exceed 87% of hydraulic lifting capacity
or 75% of tipping capacity. The excavator bucket weight is not included on this chart. Lifting capacities are for standard stick.
259013301380720
5,7102,9323,0241,587
15801190830640
3,4832,6241,8301,410
14
Page 15
303.5D CR, 304D CR, 305.5D CR, 305D CR Standard Equipment
Standard equipment may vary. Consult your Cat dealer for details.
1-way and 2-way (combined function)
auxiliary hydraulic lines
Adjustable wrist rests
Alternator
Automatic engine idle
Automatic swing park brake
Automatic two speed travel
Auxiliary line quick disconnects
Boom cylinder guard
Cab mounted work light
Canopy with FOPS ISO 10262 (Level1)
andTip-Over Protection (TOPS) ISO 12117
Coat hook
Cup holder
Control pattern changer
(not available in Europe)
Dozer blade with oat function
Floor mat
Foot travel pedals
Gauges or indicators for fuel level engine
coolant temperature, hour meter, engine oil
pressure, air cleaner, alternator and glow
plugs, service interval
Horn
Hydraulic oil cooler
Lifting eye on bucket linkage
Optional equipment may vary. Consult your Cat dealer for details.
Air conditioning
Angle dozer blade with oat function
Beacon socket for canopy machines
Boom check valve (Europe only)
Boom mounted light
Cab, radio ready with FOPS ISO 10262
Ecology drain valve for hydraulic tank
Ecology drain valve for engine oil
Fan and sun blind installation
Front screen guard for cab and canopy
High back suspension seat, fabric covered
Hydraulic quick coupler lines
Materials and specifications are subject to change without notice. Featured machines
in photos may include additional equipment. See your Cat dealer for available options.
CAT, CATERPILLAR, SAFETY.CAT.COM, their respective logos, “Caterpillar Yellow” and
the “Power Edge” trade dress, as well as corporate and product identity used herein,
are trademarks of Caterpillar and may not be used without permission.
20
AEHQ6136 (09-2010)
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