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Poclain Hydraulics Radial Piston Motor MS18 MSE18
Technical Specifications Comparison: MS18 vs. MSE18
| Technical Parameters | MS18 Specifications | MSE18 Specifications |
|---|---|---|
| Displacement Range | 1,091 cc/rev to 2,812 cc/rev | 1,091 cc/rev to 2,812 cc/rev |
| Nominal Pressure | 400 bar [4,350 psi] | 350 - 400 bar [5,076 - 5,800 psi] |
| Maximum Peak Pressure | 450 bar [6,526 psi] | 400 bar [5,800 psi] |
| Maximum Output Torque | Up to 17,900 N·m | Up to 15,500 N·m (varies by displacement) |
| Maximum Output Power | Approx. 68 - 70 kW | Up to 100 kW (for high-speed, light-duty batches) |
| Speed Range | 0 - 170 RPM (max displacement) / Up to 315 RPM | 0 - 170 RPM / Up to 380 RPM |
| Total Assembly Weight | Approx. 115 kg - 160 kg (varies with brake options) | Approx. 115 kg - 145 kg |
Core Technical Advantages
1. Multispeed Design: Supports both 1-Displacement (single-displacement) and 2-Displacement (dual-displacement/dual-speed switching) valve blocks. Utilizing a built-in electronically controlled pilot valve, it enables seamless switching between "high-torque, low-speed climbing" and "low-torque, high-speed travel" while the machine is in motion.
2. Exceptional Ultra-Low-Speed Stability: Featuring Poclain's patented Spherical Control Area and a multi-roller guide structure, the motor maintains a smooth output of full rated torque even at extremely low speeds of 1 RPM, completely eliminating the "crawling" or vibration phenomena often observed in conventional orbital motors.
3. Robust Axial and Radial Load-Bearing Capacity: Equipped with heavy-duty internal roller bearings, the motor's output flange directly withstands the substantial vehicle loads and lateral impact forces transmitted through the tires; it is frequently utilized as a "Wheel Motor," mounted directly onto the wheel assembly.
On-Site Hydraulic Maintenance Guidelines
1. Air Bleeding Required Upon Initial Startup: After replacing a motor or the hydraulic fluid, the drain port located at the top of the motor housing must be opened and filled with clean hydraulic fluid. Subsequently, operate the motor at a slow speed under no-load and low-pressure conditions for 10–15 minutes until all internal air bubbles have been completely purged. If any air remains trapped, a high-pressure startup will result in "cavitation" damage and burnout of the piston shoes.
2. Strictly Control Housing Back Pressure: The motor's drain line must run directly and independently to the hydraulic reservoir; connecting it in series with the system's main return line is strictly prohibited! If the back pressure exceeds 5 bar, the main shaft oil seal will instantly deform, leak fluid, or even rupture.
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