MS08-2-11A-F08-0000-5DF0 Poclain Hydraulic Motor 780cc 400bar

Product Overview

The MS08-2-11A-F08-0000-5DF0 is a two-speed (dual displacement) model in the Poclain Hydraulics MS08 series of radial piston hydraulic motors, representing the quintessential LSHT (Low-Speed High-Torque) hydraulic motor category. The MS series is Poclain Hydraulics’ globally renowned multipurpose direct-drive hydraulic motor range, featuring a proven radial piston cam-ring design that has established itself as an unrivaled benchmark in the hydraulic motor market worldwide.

The MS08 series delivers maximum displacement of 1,248 cc/rev, maximum power of 41 kW, and maximum pressure up to 450 bar. The MS08-2 features two-speed (dual displacement) configuration, accommodating both low-speed high-torque and high-speed light-load operating conditions via displacement switching. This model is available in both wheel motor and shaft output configurations, with a modular design that enables flexible adaptation to diverse construction and industrial equipment.

Our product provides a fully interchangeable direct replacement for the original Poclain Hydraulics MS08 series motor, with identical mounting dimensions, port specifications, and shaft configurations. 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: MS08-2-11A-F08-0000-5DF0

• Brand: Poclain Hydraulics

• Series: MS08 (MS Multipurpose Series)

• Type: LSHT Radial Piston Hydraulic Motor

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

• Max. Displacement: 780 cm³/rev (47.6 in³/rev)

• Min. Displacement: 390 cm³/rev (23.8 in³/rev)

• Displacement Ratio: 2:1

• Rated Pressure: 250 bar (3,625 psi)

• Max. Pressure: 400 bar (5,800 psi)

• Peak Pressure: 450 bar (6,527 psi)

• Max. Speed: 0–170 rpm

• Max. Power: 36 kW (full displacement)

• Max. Torque @ 100 bar: 1,166 Nm

• Rated Torque @ 250 bar: 2,914 Nm

• Mounting: Wheel Flange / Shaft Output

• Brake Options: Multi-Disc Brake (Parking Brake)

• Anti-Skid: Twin-Lock Integrated Anti-Skid Function (Optional)

• Housing Material: High-Strength Cast Iron

• Weight: Approx. 50–65 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 MS08-2 offers 2:1 dual displacement switching (780 cc/rev ↔ 390 cc/rev). Low-speed mode (large displacement) delivers maximum torque output (2,914 Nm rated torque) for heavy-load starting and climbing; high-speed mode (small displacement) provides higher output speeds (up to 170 rpm) 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, enabling direct load drive without additional speed reducers.

4. Compact Design & High Power Density
Delivers 36 kW output power and 2,914 Nm rated 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 multi-disc parking brake and Twin-Lock integrated anti-skid functionality are available. The MS series also offers Classic and HighFlow™ versions, with HighFlow™ featuring integrated exchange valves and optimized port geometry for enhanced speed and power performance.

Application Areas

The MS08-2-11A-F08-0000-5DF0 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, road roller vibratory drum drives

• Building Machinery: Beam carriers, hoisting machines, milling machines, backhoe loaders

• Agricultural Machinery: Large sprayer travel drives

• Mining Equipment: Underground mining vehicles, heavy-duty handling cars, road headers, coal mine drills

• Forestry Machinery: Stumpers, loaders, forest felling machines

• Specialty Vehicles: Fire engine travel drives

• Marine Machinery: Marine deck cranes

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.

9. If equipped with a multi-disc brake, regularly inspect brake wear and adjust brake clearance per specifications.

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