Product Overview
The MS05-1-113-A05-2A50-7M00 is a single-displacement radial piston hydraulic motor from Poclain Hydraulics’ MS/MSE05 series, featuring a displacement of 515 ml/r. The MS05-MSE05 series covers displacements from 260 to 750 cc/rev with up to 50 kW (67 HP) power, 4,770 N·m (3,518 lb-ft) maximum torque and 450 bar (MS version) / 400 bar (MSE version) maximum pressure, 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 MS05 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 and making a major contribution to machine energy efficiency. Optimized through thousands of hours of development and testing, MS series motors withstand the most extreme operating conditions while requiring very little maintenance, reducing machine downtime and optimizing productivity. The motor features low noise, high radial load capacity and high starting torque, with hydrostatic dynamic braking as an inherent design feature.
The model code breaks down as follows: MS05 identifies the MS series 05 frame size; 1 denotes displacement group 1 (515/258 ml/r configuration); 113 is the flow-distribution/function module code; A05 is the shaft and mounting configuration code; 2A50 is the mounting flange and shaft code; 7M00 denotes additional options.
Every unit undergoes 100% simulated operating-condition bench testing prior to shipment. 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:
MS05-6: Full displacement 260 ml/r (15.9 cu.in/rev), half displacement 130 ml/r (7.9 cu.in/rev), max power 50 kW (1C) / 50 kW (2C 1st) / 30 kW (2C 2nd)
MS05-8: Full displacement 376 ml/r (22.9 cu.in/rev), half displacement 188 ml/r (11.5 cu.in/rev), theoretical torque at 10 MPa 562 N·m, rated torque 1,405 N·m, rated pressure 25 MPa, max pressure 40 MPa, rated speed 90 rpm, speed range 0–200 rpm
MS05-0: Full displacement 468 ml/r (28.5 cu.in/rev), half displacement 234 ml/r (14.3 cu.in/rev), theoretical torque at 10 MPa 699 N·m, rated torque 1,749 N·m, rated pressure 25 MPa, max pressure 40 MPa, rated speed 90 rpm, speed range 0–200 rpm
MS05-1 (This Model): Full displacement 515 ml/r (31.4 cu.in/rev), half displacement 258 ml/r (15.7 cu.in/rev), theoretical torque at 10 MPa 768 N·m, 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), theoretical torque at 10 MPa 837 N·m, rated torque 2,092 N·m, rated pressure 25 MPa, max pressure 35 MPa, rated speed 80 rpm, speed range 0–180 rpm
MSE05-8: Full displacement 503 ml/r (30.7 cu.in/rev), half displacement 252 ml/r (15.4 cu.in/rev)
MSE05-0: Full displacement 625 ml/r (38.1 cu.in/rev), half displacement 313 ml/r (19.1 cu.in/rev)
MSE05-1: Full displacement 688 ml/r (42.0 cu.in/rev), half displacement 344 ml/r (21.0 cu.in/rev)
MSE05-2: Full displacement 750 ml/r (45.7 cu.in/rev), half displacement 375 ml/r (22.9 cu.in/rev)
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)
Series Max Speed: 700 rpm
Type: Radial piston LSHT hydraulic motor (internal curve cam ring design)
Control: Single or dual displacement (1C or 2C)
Brake: Service brake and parking brake options
Motor Type: Wheel motor / shaft motor (modular)
Anti-Skid Option: TwinLock™ integrated anti-skid available
Motor Inertia: 0.03 kg·m²
Displacement Range: 260–750 cc/rev
Original Design: Poclain Hydraulics, France
MS05-1-113-A05-2A50-7M00 Additional Specifications:
Model Code: MS05-1-113-A05-2A50-7M00
Manufacturer Part Number: 123823
Type: Radial piston LSHT hydraulic motor, internal curve cam ring design
Displacement: 515 ml/r (31.4 cu.in/rev)
Theoretical Torque at 10 MPa: 768 N·m
Rated Torque: 1,921 N·m (1,417 lb-ft)
Rated Pressure: 25 MPa (250 bar)
Max Working Pressure: 35 MPa (350 bar)
Rated Speed: 85 rpm
Speed Range: 0–190 rpm
Valving Type: Single displacement valving module (113 code)
Mounting Flange: A05 mounting configuration
Shaft Configuration: 2A50 configuration
Anti-Skid Option: TwinLock™ available
Motor Type: Wheel motor / shaft motor (modular)
Operating Temperature Range: -40°C to +115°C
Hydraulic Fluid: Mineral oil (ISO VG46/68), synthetic oil, water glycol
Weight: ~45–50 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 MS05-1 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 768 N·m at 10 MPa and rated torque of 1,921 N·m, the motor operates smoothly across the 0–190 rpm speed range without stick-slip. MS series motors feature high torque at low speed, exceptional shock load capacity and long working life. High startup torque ensures reliable starting under load.
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 A05 mounting configuration supports both wheel-drive and shaft-output mounting for skid steer loaders, harvesters, forklifts and more. Optional TwinLock™ integrated anti-skid provides differential locking via hydraulic control for improved traction.
3. High-Precision Cam Ring and Long Service Life
The MS05-1 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. The modular design allows replacement of individual worn modules rather than the entire motor. MS series motors withstand the most extreme operating conditions while requiring very little maintenance, reducing machine downtime and optimizing productivity.
4. High Radial Load Capacity and Hydrostatic Dynamic Braking
The MS/MSE05 series motors 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, simplifying drivetrain design. Hydrostatic dynamic braking is an inherent design feature of the motor, providing reliable dynamic braking without additional braking mechanisms. The MS05 motor was selected by Groupe EP and Zeal Motor Inc for amphibious vehicle propel systems due to its small volume, reasonable weight, overall efficiency and value.
5. 100% Simulated Load Testing & Drop-In Interchangeability
Each MS05-1-113-A05-2A50-7M00 unit is bench-tested under simulated operating conditions prior to dispatch, covering pressure cycling, speed stepping 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. Motor performance is very close to original Poclain motors, with both complete motors and spare parts 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, cotton pickers
Material Handling: forklifts, aerial work platforms, beam carriers
Mining: subsurface loaders, coal mining machinery travel drives, heavy-duty handling cars
Amphibious Vehicles: Poclain MS05 motors selected by Groupe EP and Zeal Motor Inc for amphibious vehicle propel systems, providing infinite transmission ratio and excellent off-road capability
Marine & Offshore: deck machinery, winch drives
Industrial: shredders, industrial conveyors
Expert Maintenance Tips
1. 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.
2. 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.
3. Mounting Flange Surface Inspection: The MS05-1-113-A05 features A05 mounting configuration. Periodically inspect the output flange plane and wheel/tool-end 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.
4. Periodic Piston Group and Cam Ring Inspection: As a radial piston motor, the MS05-1’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. Use Poclain original specification parts when replacing piston groups to ensure fit accuracy and assembly torque per technical manual requirements.
5. Modular Repair Strategy: The MS/MSE05 series modular design allows replacement of individual worn modules rather than the entire motor. Establish a modular spare parts inventory including flow-distribution module seals, piston groups and cam rings to minimize machine downtime. When replacing modules, follow Poclain official technical manual torque values and assembly sequences.
6. Pilot Control Pressure Check (If Dual Displacement Configured): If configured with dual displacement (2C) version, inspect pilot control pressure and valving module seal condition every 1,000 hours. If shift response is sluggish or excessively harsh, inspect the pilot control spool for sticking and the flow-distribution shaft O-rings for aging. Shift operations should be performed at low speed or standstill to avoid impact loading on the distribution mechanism.
