Product Overview
The MS05-0-G24-F04-1220-5EJMT is a Poclain Hydraulics MS-series multi-purpose radial piston hydraulic motor configured with two-speed variable displacement and an integrated multi-disc wet brake. The MS series employs a modular design concept covering displacements from 172 cc/rev to 15,000 cc/rev, making it ideal for wheel-end or tool-end direct drive applications. The MS05 frame size delivers a maximum displacement of 750 cc/rev, up to 50 kW of power, 4,770 N·m maximum torque, 450 bar maximum pressure and 700 rpm maximum speed.
The model code breaks down as follows: MS05 identifies the frame size; 0 denotes the displacement group (MS05-0 full displacement 468 cc/rev, half displacement 234 cc/rev); G24 is the flow-distribution/variable control module (G-series two-speed variable configuration); F04 is the brake module (F04 integrated multi-disc wet brake with service and parking brake); 1220 is the output-end/shaft configuration; 5EJMT denotes additional options including brake release and monitoring ports.
Every unit undergoes 100% simulated operating-condition bench testing prior to shipment, covering pressure cycling, speed shifting, brake performance and thermal variation. Mounting flange, shaft end and port dimensions are identical to the original Poclain MS05 series, enabling true drop-in interchangeability with zero modification required.
Technical Specifications
MS05 Series Frame Size Specifications:
MS05-8: Full displacement 376 ml/r, half displacement 188 ml/r, max power 25 kW, 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 (This Model): Full displacement 468 ml/r, half displacement 234 ml/r, max power 25 kW, 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: Full displacement 514 ml/r, half displacement 257 ml/r, max power 25 kW, 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, half displacement 280 ml/r, max power 25 kW, 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
MS05 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)
Series Max Pressure: 450 bar (6,527 psi)
Series Max Power: 50 kW (67 HP)
Series Max Speed: 700 rpm
Type: Radial piston LSHT hydraulic motor
Control: Single or dual displacement
Brake: Integrated multi-disc wet brake (service + parking)
Motor Type: Wheel motor / shaft motor (modular)
Anti-Skid Option: TwinLock™ available
Displacement Range: 260–750 cc/rev
Weight (max): ~57 kg (126 lbs)
Original Design: Poclain Hydraulics, France
Key Technical Advantages
1. Two-Speed Variable Control for Wide Operating Range
The MS05-0 features a two-speed variable design with an on-line shift mechanism in the flow-distribution module (G24 code), switching between 468 ml/r full displacement and 234 ml/r half displacement for a 2:1 ratio. The full-displacement mode delivers 1,749 N·m rated torque for heavy-duty startup and grade climbing; the half-displacement mode significantly increases speed capability for light-load cruising. A single motor covers the full spectrum from low-speed high-torque to high-speed low-torque operation.
2. Integrated Multi-Disc Wet Brake (F04 Module)
The F04 brake module combines service brake and parking brake functions in a single integrated unit. The brake employs a hydraulically released, spring-applied fail-safe design that automatically locks when system pressure is lost, ensuring safe machine parking. This makes the MS05-0 particularly suitable for wheel-drive applications requiring reliable parking brakes.
3. Modular Architecture for Maximum Adaptability
The MS series modular design allows displacement group, flow-distribution module, brake module and output-end module to be reconfigured without structural modification to the host machine. The 1220 output-end configuration supports both wheel-drive and shaft-output mounting, enabling a single motor platform to serve skid steer loaders, harvesters, forklifts and more.
4. High-Precision Cam Ring and Long Service Life
The MS05 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 motor runs smoothly even at very low speeds without stick-slip.
5. 100% Simulated Load Testing & Drop-In Interchangeability
Each motor is bench-tested under simulated operating conditions prior to dispatch, covering pressure cycling, speed shifting, brake performance 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.
Application Areas
The MS05 series is widely deployed in heavy-duty travel and tool drives across demanding markets:
Construction: skid steer loaders, excavator swing drives, road rollers
Agriculture: combine harvesters, cotton pickers, tractor front axles
Mining: coal mining machinery, subsurface loaders, scraper conveyors
Material Handling: forklifts, aerial work platforms, beam carriers
Marine: deck machinery, winch drives
Rail: track maintenance vehicle drives
Industrial: shredders, industrial conveyors
Expert Maintenance Tips
1. Brake Release Pressure Verification: F04 brake module release pressure should be set per the technical manual. 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, spring washer and snap ring grooves with anti-oxidizing grease.
2. Two-Speed Shift System Maintenance: Two-speed shifting is controlled by pilot pressure on the flow-distribution shaft. 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.
3. Oil Cleanliness and Temperature Control: Maintain system oil cleanliness at ISO 4406 18/16/13 or better. Operating oil temperature should be kept below 80°C; elevated temperatures accelerate brake friction plate and seal degradation. Replace hydraulic oil and filter after the first 500 hours, then follow a 2,000-hour or annual replacement cycle.
4. Drain Line Management: 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. After extended shutdown, fill the housing with clean hydraulic oil before restarting.
5. Periodic Piston Group and Cam Ring Inspection: As a radial piston motor, the MS05’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.
