Product Overview
The MS11-0-DQ4-R11-1130-8DEJ is a dual-displacement radial piston hydraulic motor from Poclain Hydraulics’ MS/MSE11 series, featuring a full displacement of 1048 cc/rev and a half displacement of 524 cc/rev. This model is part of displacement group 0 of the MS11 series and has manufacturer part number A28820B. The MS/MSE11 series is the large frame offering in Poclain’s multi-purpose motor line, covering displacements from 730 to 1687 cc/rev with up to 50 kW (67 HP) power, 10,700 N·m (7,891 lb-ft) maximum torque and 450 bar (6,527 psi) maximum pressure, with a multi-speed concept reaching up to 200 rpm.
The MS/MSE11 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, serving construction equipment, material handling, agriculture, environment, mining, rail, marine and industry. The 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 hydrostatic dynamic braking as an inherent design feature. The MS/MSE11 series features 100% interchangeable interfaces with original Poclain motors.
The model code breaks down as follows: MS11 identifies the MS series 11 frame size; 0 denotes displacement group 0 (1048/524 cc/rev dual displacement); DQ4 is the control and valving module code; R11 is the mounting flange and shaft configuration code (wheel flange mounting, 10×Ø22 on Ø225); 1130 is the port and additional option code; 8DEJ denotes additional options including port orientation, shaft seal type 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 MS11 series exactly, enabling true drop-in interchangeability with zero modification required.
Technical Specifications
MS11/MSE11 Series Frame Size Specifications:
MS11-7: Full displacement 730 ml/r (44.5 cu.in/rev), half displacement 365 ml/r (22.3 cu.in/rev), theoretical torque at 10 MPa 1,162 N·m (857 lb-ft), max power 50 kW (67 HP), max speed 200 rpm
MS11-8: Full displacement 837 ml/r (51.0 cu.in/rev), half displacement 418.5 ml/r (25.5 cu.in/rev), theoretical torque at 10 MPa 1,251 N·m, rated torque 3,127 N·m, max power 44 kW (1C)/29 kW (2C), rated speed 65 rpm, speed range 0–160 rpm
MS11-9: Full displacement 943 ml/r (57.5 cu.in/rev), half displacement 471.5 ml/r (28.8 cu.in/rev), theoretical torque at 10 MPa 1,409 N·m, rated torque 3,524 N·m, max power 44 kW (1C)/29 kW (2C), rated speed 65 rpm, speed range 0–160 rpm
MS11-0 (This Model): Full displacement 1,048 ml/r (63.9 cu.in/rev), half displacement 524 ml/r (32.0 cu.in/rev), theoretical torque at 10 MPa 1,566 N·m, rated torque 3,916 N·m, rated pressure 25 MPa, max pressure 40 MPa, max power 44 kW (1C)/29 kW (2C), rated speed 65 rpm, speed range 0–160 rpm
MS11-1: Full displacement 1,147 ml/r (70.0 cu.in/rev), half displacement 573.5 ml/r (35.0 cu.in/rev), theoretical torque at 10 MPa 1,714 N·m, rated torque 4,286 N·m, rated pressure 25 MPa, max pressure 35 MPa, rated speed 60 rpm, speed range 0–150 rpm
MS11-2: Full displacement 1,259 ml/r (76.8 cu.in/rev), half displacement 629.5 ml/r (38.4 cu.in/rev), theoretical torque at 10 MPa 1,882 N·m, rated torque 4,704 N·m, rated pressure 25 MPa, max pressure 35 MPa, rated speed 60 rpm, speed range 0–150 rpm
MS11/MSE11 Series Common Specifications:
Series Max Displacement: 1,687 cc/rev (102.9 cu.in/rev)
Series Max Torque: 10,700 N·m (7,891 lb-ft)
MS Series Max Working Pressure: 450 bar (6,527 psi)
MSE Series Max Working Pressure: 400 bar (5,802 psi)
Series Max Power: 50 kW (67 HP) (1C) / 33 kW (44 HP) (2C)
Series Max Speed: 200 rpm
Type: Radial piston LSHT hydraulic motor (internal curve cam ring design)
Control: Single or dual displacement
Brake: Service brake, parking brake and hydrostatic boosted brake options
Motor Type: Wheel motor / shaft motor (modular)
Anti-Skid Option: TwinLock™ integrated anti-skid available
Motor Inertia: 0.05 kg·m²
Displacement Range: 730–1687 cc/rev
Original Design: Poclain Hydraulics, France
MS11-0-DQ4-R11-1130-8DEJ Additional Specifications:
Model Code: MS11-0-DQ4-R11-1130-8DEJ
Manufacturer Part Number: A28820B
Type: Radial piston LSHT hydraulic motor, internal curve cam ring design
Displacement: 1,048 ml/r (63.9 cu.in/rev) full / 524 ml/r (32.0 cu.in/rev) half
Displacement Ratio: 2:1
Rated Working Pressure: 25 MPa (250 bar)
Max Working Pressure: 40 MPa (400 bar) / 450 bar (peak, MS version)
Rated Torque: 3,916 N·m (2,888 lb-ft)
Theoretical Torque at 10 MPa: 1,566 N·m (full displacement)
Rated Speed: 65 rpm
Speed Range: 0–160 rpm (1C single displacement configuration)
Valving Type: Dual displacement valving module (DQ4 code)
Mounting Flange: Wheel flange mounting, 10×Ø22 on Ø225 (R11 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
Original Design: Poclain Hydraulics, France
Key Technical Advantages
1. Low Noise Radial Piston Design for Quiet and Smooth Operation
The MS11-0-DQ4 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. The design features significantly low noise characteristics, with the coordinated action of multiple pistons and the cam ring effectively reducing operating noise and torque pulsation. With theoretical torque of 1,566 N·m at 10 MPa and rated torque of 3,916 N·m at full displacement, the motor operates smoothly across the 0–160 rpm speed range without stick-slip. High starting torque ensures reliable starting under load.
2. Modular Architecture with TwinLock™ Anti-Skid System
The MS/MSE11 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 (10×Ø22 on Ø225) supports wheel-drive mounting for wheel loaders, road rollers, scrapers and mining equipment. TwinLock™ integrated anti-skid provides differential locking via hydraulic control for improved traction on challenging terrain. Brake options include service brake, parking brake and hydrostatic boosted brake modules.
3. High-Precision Cam Ring and High Radial Load Capacity
The MS11-0-DQ4 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 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. The modular design allows replacement of individual worn modules rather than the entire motor.
4. Hydrostatic Dynamic Braking and High Starting Torque
Hydrostatic dynamic braking is an inherent design feature of the motor, providing reliable dynamic braking without additional braking mechanisms. The high starting torque characteristic combined with 3,916 N·m rated torque ensures reliable starting and stable operation under load. The MS11 series maintains high volumetric and mechanical efficiency at 50 kW maximum power and 450 bar maximum pressure, making a major contribution to machine energy efficiency.
5. 100% Simulated Load Testing & Drop-In Interchangeability
Each MS11-0-DQ4-R11-1130-8DEJ 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 MS11 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 MS11/MSE11 series is widely deployed in heavy-duty travel and tool drives:
Motor Graders: SEM 922 and similar motor grader travel drive systems
Construction: wheeled excavator travel drives, scraper drives, rotary drill head drives, trenchers
Horizontal Directional Drilling: drill pipe drives and travel drive systems
Agriculture: combine harvesters, self-propelled sprayers, cotton pickers
Material Handling: heavy-duty forklifts, aerial work platforms, beam carriers
Mining: roadheader star wheel drives, subsurface loaders, coal mining machinery travel drives
Marine & Offshore: deck machinery, winch drives
Industrial: shredders, industrial conveyors, mill drives
Expert Maintenance Tips
1. Dual Displacement Valving Module Maintenance: The dual displacement valving module is controlled by pilot pressure. 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. Inspect pilot control pressure and valving module seal condition every 1,000 hours.
2. Wheel Flange Mounting Surface Inspection: The MS11-0-DQ4-R11 features wheel flange mounting (10×Ø22 on Ø225). 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.
5. Periodic Piston Group and Cam Ring Inspection: As a radial piston motor, the MS11-0-DQ4’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. Both displacement cam surfaces require inspection. 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.
6. Modular Repair Strategy: The MS/MSE11 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.
