Specifications
The document provides detailed specifications for two models of full hydraulic excavators, TB285 and TB290. Both models have similar dimensions and features, with slight differences in engine specifications and weight. The TB285 weighs 8390 kg and is powered by a Yanmar 4TNV98T engine, while the TB290 weighs 8440 kg and uses an ISUZU 4JJIT engine. Both engines comply with Tier 3 standards and have a rated power of approximately 50 kW.

Performance
The excavators feature a powerful engine, adjustable service flow settings, and a load sensing system. They offer ease of operation with features like an easy control lever, eco drive mode, and auto decel system. The machines are equipped with a float angle dozer blade and automatic track tensioning system for enhanced performance.

Operator Comfort
Operator comfort is prioritized with features such as a 6-way multi-adjustable suspension seat, retractable seat belt, and automatic air conditioner. Additional options include an air suspension seat and rain guard.

Safety
Safety features include a ROPS/OPG top guard, travel alarm, work lights, and various guard options. The machines also have an audible and visual warning system with an LCD monitor.

Serviceability
The excavators are designed for easy maintenance with features like a wide opening engine cover, large side cover, and sight gauges for fuel and hydraulic fluid levels. They also include an automatic fuel bleed system and dual air filter element.

Options and Equipment
Various options are available to customize the excavators, including different arm lengths, rubber pads on steel tracks, and geo-grip tracks. Service ports and holding valves are also customizable to meet specific operational needs.