MS11-1-G54-R11 Poclain Motor | 450 Bar 1147cc Wheel Drive

Product Overview

The MS11-1-G54-R11-1920-25EJM is a dual-displacement radial piston hydraulic motor from Poclain Hydraulics’ MS/MSE11 series, featuring a full displacement of 1147 ml/r and a half displacement of 573 ml/r. This model is the original equipment travel motor for the LiuGong CLG4230D motor grader, corresponding to OEM part number 04Y0072.

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 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 model code breaks down as follows: MS11 identifies the MS series 11 frame size; 1 denotes displacement group 1 (1147/573 ml/r dual displacement); G54 is the flow-distribution/function module code; R11 is the shaft and mounting configuration code (wheel flange mounting, 10×Ø22 on Ø225); 1920 is the port and output-end configuration code; 25EJM denotes the brake and additional option configuration.

Every MS11-1-G54-R11-1920-25EJM unit undergoes 100% simulated operating-condition bench testing prior to shipment, covering pressure cycling, speed shifting and thermal variation. 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:

• MS11-8: Full displacement 837 ml/r (51.0 cu.in/rev), half displacement 418 ml/r (25.5 cu.in/rev), max power 44 kW, rated torque 3,127 N·m, rated pressure 25 MPa, max pressure 40 MPa, rated speed 65 rpm, speed range 0–160 rpm

• MS11-9: Full displacement 943 ml/r (57.5 cu.in/rev), half displacement 471 ml/r (28.8 cu.in/rev), max power 44 kW, rated torque 3,524 N·m, rated pressure 25 MPa, max pressure 40 MPa, rated speed 65 rpm, speed range 0–160 rpm

• MS11-0: Full displacement 1,048 ml/r (63.9 cu.in/rev), half displacement 524 ml/r (32.0 cu.in/rev), max power 44 kW, rated torque 3,916 N·m, rated pressure 25 MPa, max pressure 40 MPa, rated speed 65 rpm, speed range 0–160 rpm

• MS11-1 (This Model): Full displacement 1,147 ml/r (70.0 cu.in/rev), half displacement 573 ml/r (35.0 cu.in/rev), max power 44 kW (1C) / 29 kW (2C), 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 ml/r (38.4 cu.in/rev), max power 44 kW (1C) / 29 kW (2C), 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)

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

• Series Max Power: 50 kW (67 HP)

• Series Max Speed: 200 rpm

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

• Control: Single or dual displacement (1C/2C)

• 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

• Displacement Range: 730–1,687 cc/rev

• Original Design: Poclain Hydraulics, France

MS11-1-G54-R11-1920-25EJM Additional Specifications:

• Model Code: MS11-1-G54-R11-1920-25EJM

• OEM Application: LiuGong CLG4230D motor grader travel motor (OEM Part No. 04Y0072)

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

• Displacement: 1,147 ml/r (70.0 cu.in/rev) full / 573 ml/r (35.0 cu.in/rev) half

• Displacement Ratio: 2:1

• Rated Working Pressure: 25 MPa (250 bar)

• Max Working Pressure: 35 MPa (350 bar) / 450 bar (MS version peak)

• Rated Torque: 4,286 N·m (3,161 lb-ft)

• Max Power: 44 kW (1C) / 29 kW (2C)

• Rated Speed: 60 rpm

• Speed Range: 0–150 rpm

• Valving Type: Dual displacement valving module (G54 code)

• Mounting Flange: Wheel flange mounting, 10×Ø22 on Ø225 (R11 configuration)

• Brake Module: 25EJM option configuration (with brake)

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

The MS11-1-G54-R11 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 rated torque of 4,286 N·m at full displacement, the motor operates smoothly across the 0–150 rpm speed range without stick-slip. High startup torque ensures reliable starting under load, making it ideal for motor grader wheel-drive applications.

2. Dual Displacement Design for Wide Operating Range

The MS11-1 features a dual-displacement cam ring design with on-line switching between 1147 ml/r full displacement and 573 ml/r half displacement for a 2:1 ratio. The full-displacement mode delivers maximum torque for heavy-duty grading and grade climbing; the half-displacement mode significantly increases speed capability for fast travel and light-load operation. A single motor covers the full spectrum from low-speed high-torque grading to high-speed travel.

3. Engineering Performance Optimized for Motor Grader Travel Drives

This model is the original equipment travel motor for the LiuGong CLG4230D motor grader. Motor graders require precise travel speed control, high traction output and reliable braking performance. The MS11-1-G54-R11’s dual displacement design combined with the brake module (25EJM configuration) enables operators to maintain stable low-speed traction during grading operations, switch to high-speed mode for travel, and ensure safe parking on slopes through the brake module.

4. Modular Architecture and High Radial Load Capacity

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, with large diameter bearing support directly handling wheel-end radial loads without additional bearing support mechanisms. Optional TwinLock™ integrated anti-skid provides differential locking via hydraulic control for improved traction.

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

Each MS11-1-G54-R11-1920-25EJM 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.

Application Areas

The MS11/MSE11 series is widely deployed in heavy-duty travel and tool drives:

• Motor Graders: LiuGong CLG4230D and similar models (OEM application for this model)

• 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 G54 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. Brake Module (25EJM) Maintenance: The 25EJM option may include brake configuration. Multi-disc wet brakes require periodic inspection of friction plate thickness and spring preload. Abnormally high brake release pressure typically indicates friction plate wear or piston seal failure—replace promptly. During reassembly, coat the piston seal contact surface with anti-oxidizing grease.

3. Wheel Flange Mounting Surface Inspection: The MS11-1-G54-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.

4. 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.

5. 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.

6. Periodic Piston Group and Cam Ring Inspection: As a radial piston motor, the MS11-1’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. 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.