Product Overview
The MSE05-2-133-R05-1220-EJ00 is a high-performance radial piston hydraulic motor from the Poclain Hydraulics MS/MSE05 Series. The MS/MSE05 Series occupies a pivotal position within the Poclain MS Classic platform, achieving a maximum displacement of 750 cc/rev, maximum power of 50 kW, maximum torque of 4,770 Nm, and high speeds up to 700 rpm through a multispeed design concept. Through its compact radial piston cam-lobe architecture, modular design philosophy, and outstanding low-speed high-torque characteristics, this series has been extensively validated in wheel drive systems for construction equipment, agricultural machinery, material handling, and mining applications worldwide.
The MSE05-2-133-R05-1220-EJ00 is an MSE05 frame size configuration (dual displacement) with a displacement of approximately 749–750 cc/rev. Model code breakdown: MSE05 designates the 05 frame size dual displacement motor in the MS Series (MSE version working pressure 400 bar; MS version 450 bar); 2 indicates dual displacement (2-displacement) configuration; 133 is the displacement group code; R05 specifies the mounting flange and shaft configuration; 1220 defines port location and connection specification; EJ00 specifies the brake or special option configuration. The motor is manufactured to original Poclain Hydraulics specifications with 100% drop-in interchangeability, requiring no modification to mounting interfaces, port positions, or hydraulic connections. Every unit undergoes 100% simulated operating condition testing at the factory, including rated pressure loading, volumetric efficiency verification, seal integrity assessment, and low-speed smoothness validation prior to shipment.
Technical Specifications (Bulleted List)
MSE05-2-133-R05-1220-EJ00:
Series / Type: Poclain MSE05 Series radial piston hydraulic motor, dual displacement
Displacement group: Displacement Group 133
Maximum displacement: approximately 749–750 cc/rev (45.7 cu.in/rev)
Semi-displacement: approximately 375 cc/rev (after dual displacement switching)
Design: Radial piston cam-lobe design, working cylinders radially arranged around crankshaft
Working pressure (MSE version): 400 bar (5,801 psi)
Maximum pressure (MSE version): 400 bar
Maximum torque: 4,770 Nm (3,518 lb-ft)
Maximum speed: approximately 265–375 rpm (depending on displacement configuration; 1C configuration approximately 130 rpm, 2C configuration approximately 375 rpm)
Maximum power: 29–50 kW (depending on configuration)
Direction of rotation: Bidirectional
Mounting: Wheel flange mount
Brake: EJ00 configuration (with service brake / parking brake options)
Anti-skid: TwinLock™ integrated anti-skid system compatible
Housing material: High-strength cast iron
Approximate weight: 41–70 kg (varies with brake option configuration)
MS/MSE05 Series displacement range (for reference):
Group 6: 260 cc/rev
Group 8: 376 cc/rev
Group 0: 468 cc/rev
Group 1: 515 cc/rev
Group 2: 560 cc/rev
Group 8 (MSE): 503 cc/rev
Group 0 (MSE): 625 cc/rev
Group 1 (MSE): 688 cc/rev
Group 2 (MSE): 750 cc/rev
Note: The MSE version operates at 400 bar working pressure; the MS version operates at 450 bar. Displacement data above is sourced from Poclain official technical documentation. For final selection, always confirm against the original nameplate or official technical manual.
Key Technical Advantages
1. Radial Piston Cam-Lobe Principle for High Starting Torque
The MSE05-2-133-R05-1220-EJ00 employs Poclain’s signature radial piston cam-lobe architecture, with working cylinders arranged radially around the crankshaft and pistons converting radial force into crankshaft rotational torque through the cam ring. The engineering advantage of this design lies in the direct application of piston force to the crankshaft eccentricity, maximizing the moment arm and enabling extremely high starting torque even at very low speeds. Unlike axial piston motors, the radial piston design delivers maximum torque instantaneously upon startup without requiring oil film pressure build-up, making it ideally suited for wheel drive applications involving frequent start-stop cycles and heavy-load starting.
2. Dual Displacement Switching and Multi-Speed Drive Capability
The “2” designation indicates a dual displacement configuration, capable of switching between full and semi displacement. At full displacement (approximately 750 cc/rev), the motor delivers maximum torque for heavy-load starting and grade climbing. After switching to semi displacement (approximately 375 cc/rev), output speed can be approximately doubled at the same input flow, suitable for rapid travel and transfer operations. This dual-speed concept enables a single motor to cover both low-speed high-torque and high-speed light-load operating requirements without additional gearboxes or reduction mechanisms, simplifying drivetrain design.
3. Modular Design for System Integration Flexibility
The MS/MSE05 Series features a highly modular design with flexible configuration options for wheel flanges, shaft ends, brake types (service brake, parking brake, emergency brake), and the TwinLock™ integrated anti-skid system. The engineering value of the modular architecture lies in its ability to achieve different functional configurations by replacing end cap modules rather than the entire motor. For equipment manufacturers requiring multiple drive configurations, this design significantly simplifies spare parts management and system integration complexity. The TwinLock™ anti-skid function effectively prevents vehicle rollback on slopes or low-traction surfaces, enhancing machine safety.
4. Compact Structure and High Power Density
The MS/MSE05 Series achieves 750 cc/rev displacement capability within a compact housing, with maximum power of 50 kW — a power density that leads its class among low-speed high-torque radial piston motors. The motor can be installed directly within wheel hubs (wheel drive applications), with output shaft bearings accommodating simultaneous radial and axial external loads, eliminating the need for separate bearing support housings and simplifying system design while reducing installation costs.
5. Low Noise and Smooth Low-Speed Operation
The radial piston cam-lobe structure maintains stable oil film load-bearing capacity at low speeds, with smooth piston commutation and precision flow distribution through the cam ring profile, achieving smooth output and low noise across the full speed range. Even at extremely low speeds, the motor maintains smooth operation without stick-slip phenomena — critical for travel drive applications requiring precise speed control.
Application Areas
Construction equipment: Mini loaders, skid steer loaders, backhoe loaders wheel drives, roller travel systems
Agricultural machinery: Tractor wheel drives, combine harvester ground drives, self-propelled sprayers, harvester head drives
Material handling: Forklift travel drives, telehandlers, aerial work platform travel systems
Mining equipment: Mining mini loaders, underground transport vehicle drives
Rail and marine: Suspended locomotives, ship deck auxiliary drives
Environmental equipment: Sanitation vehicle travel drives, street sweeper drives
Tool drives: Drill, milling, and cutting tool rotary drives
Expert Maintenance Tips
1. Fluid Cleanliness Management Is the Primary Task
The MS/MSE05 Series operates with micron-level clearances between radial pistons and the cam ring, and between pistons and cylinder bores. Particulate contamination in hydraulic fluid is the leading cause of piston scoring and cam ring wear. Systems must be equipped with filtration rated to ISO 4406 18/16/13 or better. In high-contamination environments such as mining or construction job sites, consider increasing filtration to ISO 4406 17/15/12 and shortening filter replacement intervals to 500–800 hours.
2. Case Drain Line Configuration Requirements
Case drain from the MSE05 motor must be routed to the reservoir through the highest drain port, with case pressure strictly controlled within specified limits. Excessive case pressure will cause shaft seal failure; insufficient pressure will reduce lubrication and heat rejection effectiveness. The case drain line must terminate below the minimum oil level in the reservoir to maintain positive return flow under all operating conditions. For models equipped with a brake, the brake leakage oil circuit should drain independently and must not share the motor case drain line.
3. Dual Displacement Switching Mechanism Maintenance
For the dual displacement MSE05-2 configuration, periodically inspect the displacement switching valve response characteristics and seal condition. The switching valve actuation pressure must be set to the value specified in the Poclain technical manual. If displacement switching lag or failure to actuate is observed, it may indicate switching spool sticking or control oil circuit blockage, warranting timely inspection. All switching mechanism seals should be replaced during any teardown procedure.
4. Pre-Start Case Filling and Air Purging
Before first startup after installation or repair, the motor case must be filled with clean hydraulic fluid through the highest case port until fluid overflows. The MSE05 radial piston architecture creates a complex internal case cavity geometry; starting an un-purged motor can cause dry friction damage between piston ball ends and the cam ring, leading to irreversible premature wear.
5. Output Shaft Spline and Mounting Alignment
The MSE05 uses wheel flange mounting. During installation, verify that the output shaft spline is properly aligned with the mating component, and that spline engagement length meets design requirements. Installation misalignment will cause abnormal spline wear and bearing side loading, significantly shortening service life. For wheel drive applications, pay particular attention to the concentricity between the wheel hub and motor flange.
6. Low-Speed Smoothness Monitoring and Maintenance
One of the MSE05 Series’ core advantages is smooth low-speed operation. If crawling or vibration is observed at extremely low speeds, it may indicate increased piston-to-bore clearance, cam ring wear, or flow distribution surface sealing degradation. Record the minimum smooth operating speed under standard conditions quarterly as a trend monitoring baseline; deviation exceeding 15% from the initial value warrants inspection.
