Product Overview
The MS35-0-1B9-R35-2A50-5EJM is a large-frame single-displacement radial piston hydraulic motor from Poclain Hydraulics’ MS35 series, belonging to displacement group 0 with a displacement of 3494 cc/rev, featuring wheel flange mounting (2A50) and integrated parking brake module (5EJM).
The MS35 series is the large frame offering in Poclain’s MS multipurpose motor line, covering displacements from 2439 to 4198 cc/rev with up to 110 kW (148 HP) power, 30,000 N·m (22,126 lb-ft) maximum torque and 450 bar (6,527 psi) maximum working pressure, with a multi-speed concept reaching up to 140 rpm. The series is built on a tried and tested radial piston cam design, employing 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 demanding applications across construction equipment, material handling, agriculture, environment, mining, rail, marine and industry.
The model code breaks down as follows: MS35 identifies the MS series 35 frame size; 0 denotes displacement group 0 (3494 cc/rev single displacement); 1B9 is the flow-distribution/function module code; R35 is the shaft and mounting configuration code; 2A50 is the wheel flange mounting and output-end code; 5EJM is the parking brake module and additional option identifier.
Every MS35-0-1B9-R35-2A50-5EJM unit undergoes 100% simulated operating-condition bench testing prior to shipment, covering pressure cycling, speed stepping and brake performance. Mounting flange, shaft end and port dimensions match the original Poclain MS35 series exactly, enabling true drop-in interchangeability with zero modification required.
Technical Specifications
MS35 Series Frame Size Specifications:
MS35-8: Full displacement 2439 ml/r (148.8 cu.in/rev), half displacement 1220 ml/r (74.4 cu.in/rev), theoretical torque at 100 bar 3,878 N·m (1,972 lb.ft), max speed 140 rpm, max pressure 450 bar
MS35-9: Full displacement 3143 ml/r (191.7 cu.in/rev), half displacement 1572 ml/r (95.8 cu.in/rev), theoretical torque at 100 bar 4,997 N·m (2,541 lb.ft), max speed 140 rpm, max pressure 450 bar
MS35-0 (This Model): Full displacement 3494 ml/r (213.1 cu.in/rev), half displacement 1747 ml/r (106.5 cu.in/rev), theoretical torque at 100 bar 5,555 N·m (2,825 lb.ft), max speed 130 rpm, max pressure 450 bar
MS35-2: Full displacement 4198 ml/r (256.0 cu.in/rev), half displacement 2099 ml/r (128.0 cu.in/rev), theoretical torque at 100 bar 6,675 N·m (3,394 lb.ft), max speed 110 rpm, max pressure 450 bar
MS35 Series Common Specifications:
Series Max Displacement: 4,198 cc/rev (256 cu.in/rev)
Series Max Torque: 30,000 N·m (22,126 lb-ft)
Series Max Pressure: 450 bar (6,527 psi)
Series Rated Pressure: 400 bar (5,000 psi)
Series Max Power: 110 kW (148 HP) favorable / 73 kW (98 HP) unfavorable
Series Max Speed: 140 rpm
Type: Radial piston LSHT hydraulic motor (internal curve cam ring design)
Control: Single or dual displacement (multi-speed concept)
Brake: Parking brake, service brake and hydrostatic boosted brake options
Motor Type: Wheel motor / shaft motor (modular)
Anti-Skid Option: TwinLock™ integrated anti-skid available
Motor Inertia: 0.5 kg·m²
Displacement Range: 2,439–4,198 cc/rev
MS35-0-1B9-R35-2A50-5EJM Additional Specifications:
Model Code: MS35-0-1B9-R35-2A50-5EJM
Type: Radial piston LSHT hydraulic motor, internal curve cam ring design, integrated parking brake
Displacement: 3,494 ml/r (213.1 cu.in/rev) single displacement
Theoretical Torque at 100 bar: 5,555 N·m (2,825 lb.ft)
Max Torque: 30,000 N·m (22,126 lb-ft, series maximum)
Rated Working Pressure: 400 bar (5,000 psi)
Max Working Pressure: 450 bar (6,527 psi)
Max Power: 110 kW (148 HP)
Max Speed: 130 rpm
Valving Type: 1B9 valving module
Mounting Flange: Wheel flange mounting (2A50 configuration)
Brake Module: 5EJM parking brake module
Shaft Configuration: Internal splined shaft, DIN 5480 standard
Anti-Skid Option: TwinLock™ available
Motor Type: Wheel motor / shaft motor
Operating Temperature Range: -40°C to +115°C
Hydraulic Fluid: Mineral oil (ISO VG46/68), synthetic oil, water glycol
Weight: ~185 kg (depending on configuration)
Key Technical Advantages
1. Internal Curve Radial Piston Design for High Startup Torque and Smooth Low-Speed Operation
The MS35-0-1B9 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 5,555 N·m at 100 bar and maximum torque of 30,000 N·m at full displacement, 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 heavy-duty wheel-drive and tool drive applications.
2. Integrated Parking Brake Module (5EJM) for Safe Parking
This model integrates the 5EJM parking brake module with a hydraulically released, spring-applied fail-safe design. The brake automatically locks when system pressure is lost, ensuring safe machine parking. Static brake torque can be verified before installation to confirm factory performance. This configuration makes the MS35-0-1B9 particularly suitable for heavy construction vehicles and mining equipment requiring reliable parking brakes.
3. Modular Architecture for Maximum Adaptability
The MS35 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 (2A50) supports wheel-drive mounting for large wheel loaders, mining trucks and heavy-duty forklifts. Optional TwinLock™ integrated anti-skid provides differential locking via hydraulic control for improved traction on challenging terrain.
4. High-Precision Cam Ring and High Radial Load Capacity
The MS35-0-1B9 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 features large diameter bearing support (internal splined shaft DIN 5480), 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, substantially reducing total cost of ownership.
5. 100% Simulated Load Testing & Drop-In Interchangeability
Each MS35-0-1B9-R35-2A50-5EJM unit 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 MS35 series exactly, enabling direct replacement without pipework or interface modification. Both complete motors and spare parts are 100% interchangeable.
Application Areas
The MS35 series is widely deployed in heavy-duty travel and tool drives:
Construction: large wheel loaders (Caterpillar 980H/988K, Volvo L220H/L260H, Komatsu WA600/WA700), large excavator travel drives
Road Rollers: large vibratory roller wheel drives and vibration shaft drives
Agriculture: large tractors (John Deere 9570RX/9620RX, Case IH Steiger 540/620)
Mining: subsurface loaders, mining truck auxiliary drives, heavy-duty handling cars
Marine & Offshore: deck machinery, winch drives, thruster drives
Industrial: large shredders, industrial conveyors, mill drives
Rail: track maintenance vehicle drives
Expert Maintenance Tips
1. Parking Brake Module (5EJM) Maintenance: The 5EJM parking brake module uses spring-applied, hydraulically released design. Periodically inspect 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. When installing the motor, ensure the motor housing drain port (port 1) is at the highest point.
2. Wheel Flange Mounting Surface Inspection: The MS35-0-1B9-R35-2A50 features 2A50 wheel flange mounting. 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 MS35-0-1B9’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.
