MSE08-2-121-A08-0000-8D00 Poclain Motor | 450 Bar 1248cc

Product Overview

The MSE08-2-121-A08-0000-8D00 is a mid-large frame radial piston hydraulic motor from Poclain Hydraulics’ MS/MSE08 series, belonging to the MSE-series (E-version, 400 bar maximum working pressure). The MS/MSE08 series covers displacements from 467 to 1,248 cc/rev with up to 41 kW (55 HP) power, 7,945 N·m (5,859 lb-ft) maximum torque and 450 bar (MS version) / 400 bar (MSE version) maximum pressure, with a multi-speed concept reaching up to 450 rpm.

The MS/MSE08 series employs a modular design concept allowing a single base motor to be configured with different displacement groups, flow-distribution modules, brake modules and output-end modules for wheel-drive or shaft-drive installation. Primary applications include construction equipment, material handling, agriculture, environment, mining, rail, marine and industry. The MS08 series features 100% interchangeable interfaces with original Poclain motors, widely deployed in roadheader star wheel drives, road rollers, skid steer loaders and other heavy-duty travel drive applications.

The model code breaks down as follows: MSE08 identifies the MS/MSE series 08 frame size (E-version, 400 bar maximum working pressure); 2 denotes dual displacement configuration; 121 is the flow-distribution/function module code; A08 is the shaft and mounting configuration code (wheel flange mounting); 0000 is the standard option combination; 8D00 denotes additional options including brake configuration, port orientation and monitoring interface.

Every unit undergoes 100% simulated operating-condition bench testing prior to shipment. Mounting flange, shaft end and port dimensions match the original Poclain MSE08 series exactly, enabling true drop-in interchangeability with zero modification required.

Technical Specifications

MS08/MSE08 Series Frame Size Specifications:

• MS08-8: Full displacement 627 ml/r, half displacement 313 ml/r, theoretical torque at 10 MPa 937 N·m, rated torque 2,343 N·m, rated pressure 25 MPa, max pressure 40 MPa, rated speed 70 rpm, speed range 0–170 rpm

• MS08-9: Full displacement 702 ml/r, half displacement 351 ml/r, theoretical torque at 10 MPa 1,049 N·m, rated torque 2,623 N·m, rated pressure 25 MPa, max pressure 40 MPa, rated speed 70 rpm, speed range 0–170 rpm

• MS08-0: Full displacement 780 ml/r, half displacement 390 ml/r, theoretical torque at 10 MPa 1,166 N·m, rated torque 2,914 N·m, rated pressure 25 MPa, max pressure 40 MPa, rated speed 70 rpm, speed range 0–170 rpm

• MS08-1: Full displacement 857/428 ml/r, theoretical torque at 10 MPa 1,281 N·m, rated torque 3,202 N·m, rated pressure 25 MPa, max pressure 35 MPa, rated speed 65 rpm, speed range 0–155 rpm

• MS08-2: Full displacement 934/467 ml/r, theoretical torque at 10 MPa 1,396 N·m, rated torque 3,490 N·m, rated pressure 25 MPa, max pressure 35 MPa, rated speed 65 rpm, speed range 0–140 rpm

• MSE08 (This Model Series): Full displacement 1,043–1,248 ml/r (63.6–76.1 cu.in/rev), max torque 6,680–7,945 N·m (4,927–5,859 lb-ft), max pressure 400 bar (5,801 psi), max speed 130 rpm, max power 41 kW (55 HP)

MS08/MSE08 Series Common Specifications:

• Series Max Displacement: 1,248 cc/rev (76.1 cu.in/rev)

• Series Max Torque: 7,945 N·m (5,859 lb-ft)

• MS Series Max Working Pressure: 450 bar (6,527 psi)

• MSE Series Max Working Pressure: 400 bar (5,801 psi)

• Series Max Power: 41 kW (55 HP)

• Series Max Speed: 450 rpm

• Type: Radial piston LSHT hydraulic motor (internal curve cam ring design)

• Control: Single or dual displacement

• Brake: Emergency brake, service brake, parking brake options

• Motor Type: Wheel motor / shaft motor (modular)

• Anti-Skid Option: TwinLock™ integrated anti-skid available

• Displacement Range: 467–1,248 cc/rev

• Original Design: Poclain Hydraulics, France

Key Technical Advantages

1. Internal Curve Radial Piston Design for High Startup Torque and Smooth Low-Speed Operation

The MSE08-2 employs Poclain’s patented internal curve radial piston design, with multiple pistons distributed along the cam ring’s internal curve to deliver high torque at extremely low speeds. With a series maximum torque of 7,945 N·m, the motor operates smoothly across the 0–130 rpm speed range without stick-slip. High startup torque ensures reliable starting under load, making it ideal for wheel-drive and roadheader star wheel drive applications.

2. Modular Architecture for Maximum Adaptability

The MS/MSE08 series employs Poclain’s modular design concept, allowing displacement group, flow-distribution module, brake module and output-end module to be reconfigured. The wheel flange mounting configuration supports wheel-drive mounting for roadheaders, road rollers, wheel loaders, skid steer loaders and mining equipment. Optional TwinLock™ integrated anti-skid provides differential locking via hydraulic control for improved traction on challenging terrain.

3. High-Precision Cam Ring and Long Service Life

The MSE08-2 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, substantially reducing total cost of ownership.

4. High Radial Load Capacity

The MS/MSE08 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.

5. 100% Simulated Load Testing & Drop-In Interchangeability

Each MSE08-2 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 MSE08 series exactly, enabling direct replacement without pipework or interface modification. Both complete motors and spare parts are 100% interchangeable.

Application Areas

The MS08/MSE08 series is widely deployed in heavy-duty travel and tool drives:

• Mining: roadheader star wheel motors (typical application for this model), subsurface loaders, coal mining machinery travel drives

• Construction: road rollers, wheel loaders (New Holland W70C, etc.), compact excavator travel drives

• Agriculture: combine harvesters, self-propelled sprayers, mowers

• Material Handling: heavy-duty forklifts, beam carriers, aerial work platforms

• Marine & Offshore: deck machinery, winch drives

• Industrial: shredders, industrial conveyors, mill drives

Expert Maintenance Tips

1. 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 seal degradation. Replace hydraulic oil and filter after the first 500 hours, then follow a 2,000-hour or annual replacement cycle.

2. 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.

3. Wheel Flange Mounting Surface Inspection: 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.

4. Periodic Piston Group and Cam Ring Inspection: Inspect piston roller wear and cam ring working surface every 2,000 hours. Both displacement cam surfaces require inspection. Abnormal noise or efficiency loss requires immediate shutdown and service.

5. Modular Repair Strategy: The MS/MSE08 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.