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MAG-170VP-3800 Travel Motor
The MAG-170VP-3800 from KYB is an integrated swash plate axial piston travel motor with planetary reduction, designed for 25–30 t crawler excavators and other heavy tracked machinery. Rated pressure is 34 MPa, with a maximum output torque of 3,800 kgf·m. Featuring dual-speed variable displacement, built-in brake, and balance valve, it delivers high-pressure, high-efficiency performance with flexible dual-speed operation, reliability, low noise, and a compact design-making it a leading choice for heavy-duty tracked equipment drive systems.
Key Features
Dual-Speed Variable Displacement & Integrated Planetary Reduction
Swash plate axial piston motor with dual-speed variable displacement (~95/180 cc/r), speed ratio ~1.5–2:1. External pilot control (2–7 MPa) enables reliable shifting. Integrated high-strength planetary reducer with rotating housing distributes load evenly, fits inside track installation, and provides compact, high-efficiency power transmission.
High Pressure & Efficient Hydraulic Balance
Piston hydraulic balance structure ensures stable operation under high pressure with low friction loss. Exceptional volumetric and mechanical efficiency enables low-speed, high-torque output, ideal for heavy starts and climbing operations. Maximum working pressure: 34 MPa.
Comprehensive Safety & Reliable Braking
Built-in dual balance valves and non-impact crossover relief valve minimize shifting and braking shock. Mechanical negative parking brake integrates with balance valves for automatic locking at stop and release at start, preventing rollback and enhancing operational safety.
Smooth, Low-Noise Operation
Optimized valve and flow channel design reduce hydraulic noise. Variable displacement switching and braking are smooth, providing jerk-free travel and enhanced operator comfort.
Durable & Built for Harsh Conditions
High-precision planetary gears and heavy-duty bearings with wear-resistant treatment withstand dust, vibration, and extreme temperatures. Optional freewheel and automatic shift features adapt to various operating requirements.
Easy Installation & Broad Compatibility
Multiple interface options and installation dimensions allow direct replacement for Doosan TM40, Nabtesco GM38VA, and other competitive units. Suitable for mainstream 25–30 t excavators (e.g., Kobelco SK260-8, Sumitomo SH225X-3). Spare parts are widely available, with mature maintenance techniques.
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Core Advantages
Advantage | Description |
Wide Power Adaptability | Dual-speed variable displacement + 3,800 kgf·m torque balances heavy-load low-speed and high-efficiency high-speed needs, supporting climbing, transit, and fine operation scenarios to enhance work efficiency. |
High Safety | Multiple hydraulic protections and mechanical parking brake prevent overload, rollback, and impact damage, ensuring operator and equipment safety. |
Energy Efficient | Hydraulic balance design and low-loss transmission reduce fuel consumption and system heat, extending hydraulic oil and component life. |
Reliable & Durable | High-strength reducer and wear-resistant components ensure long-term stable operation under harsh conditions, minimizing downtime and maintenance costs. |
Flexible Compatibility | Standardized interfaces and installation dimensions allow direct replacement of equivalent products for mainstream 25–30 t excavators, reducing retrofit costs. |
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Applications
Primarily used as the travel drive for 25–30 t crawler excavators. Also suitable for crawler drills, mining tracked equipment, and other heavy-duty tracked machinery. Ideal for construction, mining, road engineering, and other high-load, multi-function applications, especially where power, safety, and reliability are critical.