Sumitomo SH120 Final Drive Track Travel Motor
The Sumitomo SH120 Final Drive Track Travel Motor is a complete travel drive assembly for compatible excavators. It is mounted on the undercarriage and drives the track chain. The assembly combines a hydraulic motor, a planetary gear reducer and a brake. It converts hydraulic pressure into controlled track rotation. This allows the excavator to move forward, reverse and turn.
Final Drive Function
The final drive receives hydraulic oil from the travel control valve. The hydraulic motor converts pressure into rotation. The planetary reducer reduces speed and increases torque. The output shaft drives the sprocket, which moves the track chain. A brake holds the machine on slopes and prevents movement when the travel control is neutral. The final drive must support the weight of the machine and the forces produced during digging.
Construction
The assembly includes a hydraulic motor section, a reducer section and a brake section. The housing is made from high strength material. Gears and bearings are designed for high torque and shock loads. Seals keep hydraulic oil in and contaminants out. The output shaft and mounting flange are designed for the SH120 undercarriage. Correct fit and alignment are important for reliable operation.
Applications
The final drive is used in Sumitomo SH120 excavators and compatible machines. It supports travel on soil, gravel, mud and construction sites. It is used in digging, loading, grading and trenching work. The assembly can be used in repair, overhaul or replacement of a failed travel drive.
Installation Notes
Installation should be performed with proper lifting equipment and safety procedures. The machine should be supported securely. Hydraulic lines should be capped and clean. The mounting surface should be free from dirt and damage. Bolts should be tightened to the correct torque. After installation, fill the hydraulic system and bleed air. Check for leaks and verify travel direction before full operation.
Maintenance
Regular maintenance includes checking hydraulic oil cleanliness, filter condition and leaks. The final drive should be inspected for abnormal noise, vibration and overheating. Track tension should be maintained. Worn seals and bearings should be replaced during service. Following the maintenance schedule helps extend service life.
Conclusion
The Sumitomo SH120 Final Drive Track Travel Motor is a critical undercarriage component for excavator travel. It provides reliable hydraulic drive, speed reduction and braking. Correct installation, clean hydraulics and regular maintenance help ensure dependable performance.
