Milton CAT 305.5D CR User Manual

303.5D CR, 304D CR,

305D CR, 305.5D CR

Mini Hydraulic Excavators

	303.5D CR	304D CR	305D CR	305.5D CR
Engine
Engine Model	Mitsubishi S3Q2	Mitsubishi S3Q2-T	Mitsubishi S4Q2	Mitsubishi 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 Canopy	3540 kg (7,800 lb)	3855 kg (8,500 lb)	4995 kg (11,012 lb)	5305 kg (11,696 lb)
Operating Weight with Cab	3700 kg (8,160 lb)	4015 kg (8,852 lb)	5155 kg (11,365 lb)	5465 kg (12,048 lb)
Operating Specifications
Maximum Dig Depth	3180 mm (10'4")	3430 mm (11'3")	3670 mm (12'1")	3870 mm (12'8")

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 303.5D CR 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

fuel efficiency.

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
Performance.........................................................	4
Compact Radius, Zero Tail Swing.....................	5
Coupler and Work Tool Options.........................	6
Dozer Blade..........................................................	7
Undercarriage......................................................	7
Serviceability........................................................	8
Customer Support................................................	8
Specifications......................................................	9
Standard Equipment..........................................	15
Optional Equipment...........................................	15

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.

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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 work area.

•A pattern control changer (not available in all regions) is accessible 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 is available as an option and features:

•Sealed cab with heat and optional air conditioning

to keep you comfortable in a wide range of conditions.

•Radio ready with speakers and easy radio installation.

•Removable lower front window and sliding windows for excellent 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 of damage.

Joystick Controls

The boom swing and auxiliary hydraulic functions are located at your fingertips 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 floor for more room for the operator’s feet.

100% pilot controls provide consistent flow and pressure throughout the life of the machine. This also allows

all controls to be locked out while starting the machine and when the safety lockout bar is in the up position.

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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 the optional 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 flow for smooth, powerful performance and increased

fuel efficiency.

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. It also allows for easier vertical wall digging without having to reposition the machine.

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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 confined 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, the upper 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.

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