MS05-2-133-R05-1220-EFJM Poclain Hydraulic Motor 750cc 450bar

Product Overview

The MS05-2-133-R05-1220-EFJM is a core model in the Poclain Hydraulics MS05 series of radial piston hydraulic motors. The MS series is Poclain Hydraulics’ globally renowned multipurpose direct-drive hydraulic motor range, featuring a proven radial piston cam-ring design and representing the quintessential LSHT (Low-Speed High-Torque) motor category. With exceptional low-speed stability, ultra-high starting torque, and outstanding reliability, MS motors have become an unrivaled benchmark in the hydraulic motor market worldwide.

The MS05 series features radial piston cam-ring technology, with working cylinders radially arranged around a crankshaft. The MS05-2 is a two-speed (dual displacement) configuration, offering switchable displacement between 750 cm³/rev and 375 cm³/rev to accommodate both low-speed high-torque and high-speed light-load operating conditions. The EFJM suffix denotes special seal and port configurations for heavy-duty industrial applications. This model is available in both wheel motor and shaft output configurations.

Our product provides a fully interchangeable direct replacement for the original Poclain Hydraulics MS05 series motor, with identical mounting dimensions, port specifications, and shaft configurations—plug-and-play with zero modifications required. Every unit undergoes 100% simulated duty-cycle testing—performance-validated under rated pressure, peak pressure, and full speed range to ensure volumetric efficiency, mechanical efficiency, torque output, noise levels, and thermal characteristics meet or exceed original OEM specifications.

Technical Specifications 

• Full Model: MS05-2-133-R05-1220-EFJM

• Brand: Poclain Hydraulics

• Series: MS05 (MS Multipurpose Series)

• Type: LSHT Radial Piston Hydraulic Motor

• Displacement Stages: 2C (Two-Speed / Dual Displacement)

• Max. Displacement: 750 cm³/rev

• Min. Displacement: 375 cm³/rev (based on 2:1 ratio)

• Max. Working Pressure: 450 bar

• Max. Torque @ 100 bar: 1,193 Nm

• Start-up Torque: Exceptionally high starting torque characteristic

• Max. Speed: 265 rpm

• Max. Power: 29 kW

• Displacement Ratio: 2:1 (two-speed switching)

• Mounting: Wheel Flange / Shaft Output (Splined Shaft)

• Brake Options: Emergency Brake, Service Brake, Parking Brake

• Anti-Skid: Integrated Twin-Lock Anti-Skid Function

• Noise Level: Low-noise design

• Housing Material: High-Strength Cast Iron

• Weight: Approx. 45–55 kg (depending on configuration)

Key Technical Advantages

1. Radial Piston Cam-Ring Design — Industry Benchmark
The MS series features the proven and continuously improved radial piston cam-ring technology. Working cylinders are radially arranged around a crankshaft, with pistons actuated by the cam ring. This design delivers exceptional efficiency at any speed or operating pressure, combined with outstanding impact resistance and heavy-load capacity.

2. Two-Speed Dual Displacement — Two Motors in One
The MS05-2 offers 2:1 dual displacement switching (750 cm³/rev ↔ 375 cm³/rev). Low-speed mode (large displacement) delivers maximum torque for heavy-load starting and climbing; high-speed mode (small displacement) provides higher output speeds for travel and transport. One motor covers two distinctly different operating conditions.

3. Ultra-High Starting Torque & Superior Low-Speed Stability
The radial piston cam-ring design endows the MS series with exceptionally high starting torque — approaching 90% of theoretical torque. The motor operates smoothly at extremely low speeds (approaching 0 rpm), enabling direct load drive without additional speed reducers.

4. Compact Design & High Power Density
Delivers 29 kW output power and 1,193 Nm/100 bar torque in a compact package. Direct-drive design eliminates intermediate transmission components, simplifying system architecture and improving overall efficiency.

5. Modular Design & Versatile Configurations
The MS series features a modular design philosophy, offering both wheel motor and shaft output configurations. Optional emergency brake, service brake, parking brake, and Twin-Lock integrated anti-skid functionality meet diverse OEM requirements.

Application Areas

The MS05-2-133-R05-1220-EFJM radial piston motor is widely used in travel drives and working function drives across construction and industrial equipment:

• Construction Equipment: Skid-steer loader travel drives (e.g., John Deere 280 series)

• Road Construction Equipment: Roller vibratory drum drives (Amkodor 2551/2561 models)

• Agricultural Machinery: Large combine harvester travel and header drives

• Material Handling: Telescopic handler travel drives

• Mining Equipment: Underground mining vehicle travel drives

• Drilling Equipment: Drill rig rotary drives

• Industrial Drives: Winch drives and heavy material handling equipment

• Forestry Machinery: Skidder and logging equipment travel drives

Expert Maintenance Tips

1. Shaft seals and all O-rings must be replaced after every disassembly.

2. Pre-lubricate all moving parts with clean hydraulic fluid before assembly.

3. Purge all air from the motor housing before initial start-up, and run at moderate load and speed for 10–15 minutes for break-in.

4. Recommended maximum system operating temperature should not exceed 82°C to ensure seal and fluid service life.

5. Monitor case drain flow regularly — an abnormal increase indicates potential piston or cylinder wear.

6. Two-speed shifting should be performed under low-load or zero-load conditions to prevent impact damage to the displacement switching mechanism.

7. Ensure hydraulic system filtration meets β₁₀ ≥ 75 (ISO 4406 cleanliness code不低于 18/16/13) to maximize motor service life.

8. For wheel mount applications, strictly follow specified bolt torque and use thread-locking compound to prevent loosening.

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