Poclain MS MSE Series Hydraulic Motor | MS05 High Torque Radial Piston Wheel Motor Replacement

Genlu Hydraulic proudly introduces our MS and MSE Series (comprehensively covering 02, 05, 08, 11, 25, 35, 50, and 83 base displacement module frame sizes) high-power multi-cam radial piston hydraulic motors. This series is fully engineered as a seamless, high-value, drop-in replacement for the classic Poclain MS/MSE series heavy-duty multi-purpose walking vehicle wheel motors (such as the specific wheel-hub configuration: MS05-2-133-R05-1220-E000). Serving as the absolute premium choice for independent all-wheel-drive (AWD) axleless vehicle setups, special construction utility machinery, and agricultural wheel drive subsystems, these motors feature a modular multi-plate architectural layout. The unit cleanly houses dynamic roller-piston kits, micro-ground valve plates, heavy-duty tapered wheel-hub bearings, and extensible multi-disc parking brakes. Genlu guarantees 100% Drop-in Interchangeability across standard wheel mounting configurations (1220 stud circle arrays), pilot dimensions, fluid port centerlines, and displacement shifts compared to original Poclain benchmarks. Every single motor undergoes 100% heavy-duty simulation testing under extreme dynamic torque loads to certify excellent low-speed stability and structural lifecycles.

Technical Specifications 

• Product Series: Poclain MS / MSE Series Multi-Cam Radial Piston Fixed Hydraulic Motors

• Specific Identification Code: MS05-2-133-R05-1220-E000

• Base Machine Platform: MS05 (Generation 2 Technological Matrix)

• Stator Geometric Displacement: 133 cc/rev (Full scale option matrix from 02 to 83 framework ranges available)

• Wheel Flange Interface: Code 1220 (Equipped with high-tensile wheel lug studs tailored for direct tire-rim bolting)

• Control & Valving Configuration: R05 (Standard single displacement clockwise rotation valve plate, adaptable for dual-displacement or high-speed bypass)

• Nominal Operating Pressure: 40 MPa (400 bar)

• Peak Dynamic Circuit Pressure: 45 MPa (450 bar)

• Max Permissible Shaft Torque: Up to 850 Nm (Intermittent value; torque climbs geometrically alongside frame displacement sizing)

• Operational Velocity Spectrum: 0 to 200 rpm (Enables continuous, cogging-free stability down to an ultra-low 1 rpm speed profile)

• Integrated Mechanical Braking: E000 (Standard configuration without supplementary brakes, or fully customizable with internal heavy wet-disc safe hydraulic brakes)

Key Technical Advantages:

• Multi-Piston Radial Multi-Cam Power Delivery: The internal pistons are arranged in a radially symmetric matrix pushing against a micro-ground wave-shaped cam ring ring. This kinematics strategy creates pure torque transmission, balancing out destructive piston side-loads and granting the motor exceptional Low-Speed High-Torque (LSHT) smooth operation without cogging.

• Heavy-Duty Monoblock Tapered Roller Wheel Bearings: The output wheel hub flange houses a high-rigidity, large-dimension dual-row tapered roller bearing cluster. This arrangement is purposely stress-rated to absorb severe radial vehicle weight distribution and intense axial cornering moments generated during rough off-road mobile usage, eliminating any need for separate load-bearing axles.

• Smooth Power-Saving Free-Wheeling Capabilities: Advanced internal geometry permits full piston free-wheeling functionality (critical during highway towing or high-speed machine cruising). When control pilot pressure drops, the rolling pistons retract fully into the cylinder core away from the cam ring, allowing high-speed coasting with zero frictional parasitic loss, zero drag heat, and zero component wear.

• Flat Surface Hardened Valving Interface: The core valve plate is machined from deep-hardened wear-resistant steel alloy, micro-polished to a mirror finish. Large-diameter cross-sectional flow passages lower flow restrictions, guaranteeing low bypass case leakage under high cyclic loads and maintaining volumetric efficiency well over $96\%$ across extensive service intervals.

Application Areas:

• High-Yield Agriculture & Forestry Fleet: Rear auxiliary wheel drive systems for large grain combine harvesters, self-propelled agricultural boom sprayers, and industrial timber forwarders undercarriages.

• Infrastructure Construction & Road Maintenance: Dynamic wheel-drive tracking for skid-steer loaders, steel vibratory drum drives for road rollers, and heavy road asphalt cold-milling planners.

• Special Logistics & Industrial Material Handling: Straddle carriers wheel hubs, Self-Propelled Modular Transporters (SPMT) driving axle arrays, and subterranean explosion-proof mining transport vehicles.

Expert Maintenance Tips:

• Enforce Independent Zero-Pressure Case Drain Plumbing (Mandatory Protocol): As high-power-density multi-cam radial piston motors, the MS05 relies heavily on dynamic internal case oil flow to cool and lubricate the roller-piston sliding contact zones. Run a dedicated, unrestricted drain line straight back to the reservoir, keeping case pressure strictly under $< 0.1 \text{ MPa}$. Restrictions or connection errors to a pressurized line will blow out the heavy-duty shaft lip seal, initiating catastrophic internal dry scuffing.

• Execute Mandatory Case Priming via Highest Port Prior to Crank: Once the motor is secured into the wheel assembly (typically on a horizontal axis layout), you must completely flood the inner casing with clean, filtered hydraulic oil through the highest structural drain opening before operational startup. Bleed all trapped air pockets. Running the system unprimed forces immediate mechanical galling between the piston heads and shoe components.

• Regularly Audit Wheel Stud Torque Profiles and Fluid Moisture Levels: Field vehicles operate in highly aggressive mud and rock parameters. Wheel lug nuts on the 1220 hub flange must be regularly checked with a torque wrench to prevent stress concentration fractures on the flange body. Additionally, during wet agricultural field operations, sample the oil every 300 hours to ensure the outer environmental exclusion seals have not been breached by external muddy moisture.

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