General Specifications
The document outlines the specifications for the 28N, 35N, and 55N series mini excavators, focusing on bucket capacity, machine weight, transport dimensions, gradeability, ground pressure, and minimum ground clearance. These models are powered by Yanmar diesel engines, each offering different power outputs and fuel efficiency.

Engine and Electrical System
The mini excavators are equipped with Yanmar direct injection diesel engines, with each model having a distinct power output. The electrical system comprises a 12V battery, alternator, and starter motor.

Hydraulic System
The hydraulic system includes a Power Shift hydraulic circuit control system with variable displacement pumps and a gear pump, providing maximum flow and pressure settings for precise operation.

Slewing and Undercarriage
The slewing system utilizes an orbital hydraulic motor for angular positioning, while the undercarriage is designed for stability, detailing width, crawler shoe width, and track tension.

Travel System and Capacity
The travel system is driven by a two-speed axial piston hydraulic motor, with specified capacities for fuel, hydraulic, engine oil, and coolant for each model.

Safety and Comfort Features
Safety features include TOPS, ROPS, and FOPS certifications. Operator comfort is enhanced with a sprung vinyl seat, non-slip floor, and safety belt.

Optional Equipment
Optional features include long arms, quick coupling for attachments, additional lighting, and environmental protection options like biological hydraulic fluid and exhaust catalyser.

Performance and Efficiency
The document emphasizes the performance capabilities of each model, highlighting stability, digging performance, and operator comfort. Features like the Power Booster System and twin travel speed function enhance efficiency in challenging conditions.

Operator Comfort and Safety
Operator comfort and safety are prioritized with features such as an adjustable suspended seat, ergonomic control layout, and joystick servo controls with armrests. A safety system halts all operations when the operator leaves the seat.

Quick and Easy Maintenance
Maintenance is streamlined with easy access to components, a spacious engine compartment, and removable side panels.

Technical Specifications
Technical details include operating weight with canopy/cab, standard bucket, undercarriage length, rear swing radius, and maximum digging depth.

Variable Displacement Hydraulic Pumps
The hydraulic circuit's variable displacement pumps allow for multiple control operations, enhancing efficiency and speed.

Excellent Control
A new spool design in the hydraulic control valve ensures smooth and precise movements, with an anti-shock valve in the boom circuit reducing vibration during excavation.

Minimum Distance Between Bucket and Dozer Blade
The document describes optimal boom movement geometry and reduced distance between the bucket and dozer blade, facilitating close excavation and material loading.