Technical Specifications Overview

This document provides detailed technical specifications for a series of tracked vehicles/models identified as STX 150, STX 180, STX 220, STX 290, STX 350, and STX 430. The data covers dimensions, power units, hydraulic and electrical systems, transmission, weights, and cabin features.

1. Dimensions

• Key dimensions (A to L) are provided in millimeters and inches, showing variations across models. For example, length (B) ranges from 3671 mm (145 in) for STX 150 to 5002 mm (196 in) for STX 290.
• Other dimensions such as width, height, and track-related measurements are specified to define the vehicle footprint and operational envelope.

2. Power Unit

• Engines are branded FPT or VOLVO, with models varying by vehicle size.
• Net flywheel power ranges from 143 hp (105 kW) for STX 150 to 390 hp (290 kW) for STX 430, all rated at 2100 rpm.
• Engine cylinders range from 4 to 6, with displacements from 3.6 L (220 in³) to 12.78 L (780 in³).
• All engines comply with EU Stage V emissions standards.

3. Electrical System

• Voltage and battery configurations differ: smaller models use 12 V single battery, larger models use 24 V dual batteries.

4. Hydraulic System

• Two closed circuits are used for hydrostatic transmission.
• Open circuits for services vary from 4 to 7 depending on model.
• Maximum hydraulic flow ranges from 70 to 80 L/min (18.5 to 21.1 gpm).
• Maximum hydraulic pressure is generally 210 bar (3046 psi), with STX 350 slightly lower at 190 bar (2756 psi).

5. Transmission

• Maximum speeds vary by model: from 0 to 8 km/h (5 mph) for smaller models up to 12 km/h (7.5 mph) for larger ones.
• Controls are Full Speedtronic EVO type.

6. Fuel and Hydraulic Refills

• Fuel tank capacities range from 110 L (29 US gal) to 520 L (138 US gal).
• Hydraulic system refill volumes range from 170 L (45 US gal) to 380 L (100 US gal).

7. Weights and Ground Pressure

• Operating weights range from 5800 kg (12,787 lbs) to 18,100 kg (39,903 lbs).
• Ground pressure varies between 0.38 and 0.58 kg/cm² depending on model.

8. Carriages and Tracks

• Vehicles feature swinging track carriages with sealed and lubricated chains for durability and maintenance reduction.

9. 3-Point Hitch / Drawbar

• Categories II and IV are specified depending on model.
• Lifting capacities range from 3500 kg (7,716 lbs) to 12,000 kg (26,456 lbs).

10. PTO (Power Take-Off)

• Standard independent PTO speed is 1000 rpm.

11. Cabin and Safety Features

• Standard cabin includes spring suspension with side tilt capability.
• Features include one glass door, heating, cooling, ventilation, radio, horn, and six LED working lights.
• ROPS (Roll-Over Protective Structure) and FOPS (Falling Object Protective Structure) are standard for operator safety.

Summary

This document serves as a comprehensive technical reference for the STX tracked vehicle series, detailing critical parameters for design, operation, and maintenance. It highlights the progressive increase in size, power, and capacity across models, ensuring suitability for various heavy-duty applications. The inclusion of EU Stage V compliant engines and advanced hydraulic and transmission systems reflects modern standards and operational efficiency.