Product Overview
The MS05-0-G14-A05-2A50-5E00 is a single-displacement radial piston hydraulic motor from Poclain Hydraulics’ MS/MSE05 series, featuring a displacement of 468 ml/r. The manufacturer part number is A27163A. The MS/MSE05 series covers displacements from 260 to 750 cc/rev with maximum power of 50 kW (67 HP), maximum torque of 4,770 N·m (3,518 lb-ft), maximum working pressure of 450 bar (6,526 PSI) for MS version and 400 bar (5,801 PSI) for MSE version, with a multi-speed concept reaching up to 700 rpm. The modular design facilitates use in demanding applications across construction equipment, material handling, agriculture, environment, mining, rail, marine and industry.
The MS/MSE05 series is built on a tried and tested radial piston cam design that is continually being improved, delivering high efficiency at any speed or operating pressure. The motor features low noise, high radial load capacity and high starting torque, with a multi-piston cam ring structure. Hydrostatic dynamic braking is an inherent design feature. The MS05 series employs imported bearings and oil seals, modular design, and smooth running even at very low speeds, with permissible radial and axial loads and multi-disc brake availability.
The model code breaks down as follows: MS05 identifies the MS series 05 frame size; 0 denotes displacement group 0 (468/234 ml/r configuration); G14 is the flow-distribution/function module code; A05 is the brake module code; 2A50 is the output shaft configuration (wheel flange mounting, 10×Ø18 on Ø140); 5E00 denotes additional options.
Every MS05-0-G14-A05-2A50-5E00 unit undergoes 100% simulated operating-condition bench testing prior to shipment, covering pressure cycling, speed stepping and volumetric efficiency verification. Mounting flange, shaft end and port dimensions match the original Poclain MS05 series exactly, enabling true drop-in interchangeability with zero modification required.
Technical Specifications
MS05/MSE05 Series Frame Size Specifications:
MS05-8: Full displacement 376 ml/r (22.9 cu.in/rev), half displacement 188 ml/r (11.5 cu.in/rev), max power 25 kW (1C) / 17 kW (2C), theoretical torque at 10 MPa 562 N·m (full) / 275 N·m (half), rated torque 1,405 N·m, rated pressure 25 MPa, max pressure 40 MPa, rated speed 90 rpm, speed range 0–200 rpm
MS05-9: Full displacement 468 ml/r (28.5 cu.in/rev), half displacement 234 ml/r (14.3 cu.in/rev), max power 25 kW (1C) / 17 kW (2C), theoretical torque at 10 MPa 699 N·m (full) / 343 N·m (half), rated torque 1,749 N·m, rated pressure 25 MPa, max pressure 40 MPa, rated speed 90 rpm, speed range 0–200 rpm
MS05-0 (This Model): Full displacement 468 ml/r (28.5 cu.in/rev), half displacement 234 ml/r (14.3 cu.in/rev), max power 25 kW (1C) / 17 kW (2C), theoretical torque at 10 MPa 699 N·m (full) / 343 N·m (half), rated torque 1,749 N·m, rated pressure 25 MPa, max pressure 35 MPa, rated speed 90 rpm, speed range 0–200 rpm
MS05-1: Full displacement 514 ml/r (31.4 cu.in/rev), half displacement 257 ml/r (15.7 cu.in/rev), max power 25 kW (1C) / 17 kW (2C), theoretical torque at 10 MPa 768 N·m (full) / 376 N·m (half), rated torque 1,921 N·m, rated pressure 25 MPa, max pressure 35 MPa, rated speed 85 rpm, speed range 0–190 rpm
MS05-2: Full displacement 560 ml/r (34.2 cu.in/rev), half displacement 280 ml/r (17.1 cu.in/rev), max power 25 kW (1C) / 17 kW (2C), theoretical torque at 10 MPa 837 N·m (full) / 410 N·m (half), rated torque 2,092 N·m, rated pressure 25 MPa, max pressure 35 MPa, rated speed 80 rpm, speed range 0–180 rpm
MS05/MSE05 Series Common Specifications:
Series Max Displacement: 750 cc/rev (45.7 cu.in/rev)
Series Max Torque: 4,770 N·m (3,518 lb-ft)
MS Series Max Working Pressure: 450 bar (6,526 PSI)
MSE Series Max Working Pressure: 400 bar (5,801 PSI)
Series Max Power: 50 kW (67 HP) (1C) / 30 kW (40 HP) (2C, 2-displacement)
Series Max Speed: 700 rpm
Type: Radial piston LSHT hydraulic motor (internal curve cam ring design)
Control: Single or dual displacement (1C/2C)
Brake: Service brake, parking brake, emergency brake options
Motor Type: Wheel motor / shaft motor (modular)
Anti-Skid Option: TwinLock™ integrated anti-skid available
Displacement Range: 260–750 cc/rev
Original Design: Poclain Hydraulics, France
MS05-0-G14-A05-2A50-5E00 Additional Specifications:
Model Code: MS05-0-G14-A05-2A50-5E00
Manufacturer Part Number: A27163A
Type: Radial piston LSHT hydraulic motor, internal curve cam ring design
Displacement: 468 ml/r (28.5 cu.in/rev)
Theoretical Torque at 10 MPa: 699 N·m (516 lb-ft)
Rated Torque: 1,749 N·m (1,290 lb-ft)
Rated Working Pressure: 25 MPa (250 bar)
Max Working Pressure: 35 MPa (350 bar)
Max Power: 25 kW (33.5 HP)
Rated Speed: 90 rpm
Speed Range: 0–200 rpm
Valving Type: G14 valving module
Brake Module: A05 brake module
Mounting Flange: Wheel flange mounting, 10×Ø18 on Ø140 (2A50 configuration)
Anti-Skid Option: TwinLock™ available
Motor Type: Wheel motor
Operating Temperature Range: -40°C to +115°C
Hydraulic Fluid: Mineral oil (ISO VG46/68), synthetic oil, water glycol
Weight: ~35–45 kg (depending on configuration)
Original Design: Poclain Hydraulics, France
Key Technical Advantages
1. Internal Curve Radial Piston Design for High Startup Torque and Smooth Low-Speed Operation
The MS05-0-G14 employs Poclain’s patented internal curve radial piston design, with multiple pistons arranged radially around a cam ring to deliver high torque at extremely low speeds. With theoretical torque of 699 N·m at 10 MPa and rated torque of 1,749 N·m at full displacement, the motor operates smoothly across the 0–200 rpm speed range without stick-slip. High startup torque ensures reliable starting under load, making it ideal for wheel-drive and tool drive applications requiring high startup torque.
2. Modular Architecture for Maximum Adaptability
The MS/MSE05 series employs Poclain’s modular design concept, allowing displacement group, flow-distribution module, brake module and output-end module to be reconfigured. The modular design facilitates use in demanding applications across construction equipment, material handling, agriculture, environment, mining, rail, marine and industry. The wheel flange mounting configuration (10×Ø18 on Ø140) supports wheel-drive mounting for skid steer loaders, harvesters, forklifts and more. The G14 valving module supports standard hydraulic port configuration, while the A05 brake module integrates parking brake functionality.
3. High-Precision Cam Ring and Low Noise Design
The MS05-0-G14 cam ring is manufactured from high-hardness alloy steel with precision grinding to resist high-frequency contact fatigue from piston rollers. A hydrodynamic oil film forms between rollers and cam ring, significantly reducing wear rate and extending overhaul intervals. MS series motors are renowned for low noise output, with the coordinated action of multiple pistons and the cam ring effectively reducing operating noise and torque pulsation. The motor can withstand substantial axial and radial forces, with large diameter bearing support enabling direct handling of wheel or tool-end radial loads without additional bearing support mechanisms.
4. Integrated Brake Module and Hydrostatic Dynamic Braking
This model is configured with the A05 brake module, supporting service brake, parking brake or emergency brake functions. Static brake torque can be verified before installation to confirm factory performance. Hydrostatic dynamic braking is an inherent design feature of the motor, providing reliable dynamic braking without additional braking mechanisms. The modular design allows replacement of individual worn modules rather than the entire motor, substantially reducing total cost of ownership.
5. 100% Simulated Load Testing & Drop-In Interchangeability
Each MS05-0-G14-A05-2A50-5E00 unit is bench-tested under simulated operating conditions prior to dispatch, covering pressure cycling, speed shifting and thermal variation. Mounting flange, shaft end and port dimensions match the original Poclain MS05 series exactly, enabling direct replacement without pipework or interface modification. The product features high mechanical efficiency and high volumetric efficiency, and can be interchanged with POCLAIN MS and MSE series hydraulic motors on performance and dimensions. Both complete motors and spare parts are 100% interchangeable.
Application Areas
The MS05/MSE05 series is widely deployed in heavy-duty travel and tool drives:
Skid Steer Loaders: Bobcat, Gehl, Mustang and similar brands
Construction: road rollers, compact excavator travel drives, trenchers
Agriculture: combine harvesters, header drives, green bean and pea harvesting machines, orchard machinery
Material Handling: forklifts, aerial work platforms, beam carriers
Mining: coal mine scraper conveyor drives, subsurface loaders, heavy-duty handling cars
Marine & Offshore: deck machinery, winch drives
Industrial: shredders, industrial conveyors
Expert Maintenance Tips
1. Brake Module (A05) Maintenance: The A05 brake module requires periodic inspection of friction plate thickness and spring preload. Abnormally high brake release pressure typically indicates friction plate wear or piston seal failure—replace friction plates and seals promptly. During reassembly, coat the piston seal contact surface with anti-oxidizing grease. According to the Poclain MS05 repair manual, removal procedures include releasing pressure in the supply circuit, disconnecting the drain line at the tank level to avoid siphoning, and disconnecting and plugging the pipes or hoses connected to the motor.
2. Wheel Flange Mounting Surface Inspection: The MS05-0-G14-A05-2A50-5E00 features wheel flange mounting (10×Ø18 on Ø140). Periodically inspect the output flange plane and wheel hub mating surface for wear or deformation. Ensure flange mating surface parallelism deviation does not exceed 0.05 mm during installation, and tighten bolts evenly in a diagonal sequence to Poclain technical manual torque values. Mounting surface flatness requirement is 0.2 mm with Ra 12.5 μm surface roughness.
3. Oil Cleanliness and Temperature Control: Maintain system oil cleanliness at ISO 4406 18/16/13 or better. HV46 hydraulic oil is recommended. Operating oil temperature should be kept below 80°C; elevated temperatures accelerate seal degradation. Replace hydraulic oil and filter after the first 500 hours, then follow a 2,000-hour or annual replacement cycle. Case drain temperature is affected by pressure and speed and is always higher than circuit temperature—system temperature must not exceed 115°C at any point.
4. Drain Line Management and Housing Priming: The drain port must return to the reservoir independently—housing back pressure must not exceed 2 bar. The drain line end must remain submerged to prevent air ingestion. Fill the housing with clean hydraulic oil before first startup. After extended shutdown, fill the housing again before restarting. According to the Poclain repair manual, installation should be performed in the reverse order of removal operations, referring to the General Installation manual (reference 801478197L).
5. Periodic Piston Group and Cam Ring Inspection: As a radial piston motor, the MS05-0-G14’s primary wear points are the piston rollers and cam ring contact surface. Inspect piston roller wear and cam ring working surface every 2,000 hours. Abnormal noise or efficiency loss requires immediate shutdown and service. According to the Poclain repair manual troubleshooting guide, if abnormal conditions occur, check the setting and condition of the back-pressure valve, and replace the cylinder block and distribution as necessary. Use Poclain original specification parts when replacing piston groups to ensure fit accuracy and assembly torque per technical manual requirements.
