MK05-2-124-F04-1340-0000 Poclain Motor | 400 Bar Wheel Drive

Product Overview

The MK05-2-124-F04-1340-0000 is a dual-displacement radial piston hydraulic motor from Poclain Hydraulics’ MK series of ultra-compact direct drive motors, featuring an integrated multi-disc parking brake (F04 module) and manufacturer part number 803044752. The MK series is Poclain’s ultra-compact direct-drive motor line engineered for space-constrained applications, featuring an ultra-short axial design and large diameter 4-contact roller bearing. The range covers displacements from 272 to 2812 cc/rev, ideal for wheel-drive and road roller vibration shaft applications.

The MK05 frame size delivers maximum displacement of 670 cc/rev, maximum power of 22.5 kW (30 HP), maximum torque of 4,265 N·m (3,146 lb-ft), maximum pressure of 400 bar (5,802 PSI) and maximum speed of 130 rpm. The series features a large diameter 4-contact roller bearing capable of directly handling wheel and vibration shaft radial loads without additional bearing support. The motor’s torque output is a flange-plane structure, enabling direct connection to wheel or tool ends. Designed specifically for road rollers, the MK05 series also serves mining, agricultural, environmental and other markets.

The model code breaks down as follows: MK05 identifies the MK series 05 frame size; 2 denotes dual displacement configuration; 124 is the flow-distribution/function module code; F04 is the brake module (F=multi-disc parking brake, 04=brake specification); 1340 is the mounting dimension and output-end configuration code; 0000 is the standard option combination.

Every unit undergoes 100% simulated operating-condition bench testing prior to shipment. Mounting flange, shaft end and port dimensions match the original Poclain MK05 series exactly, enabling true drop-in interchangeability with zero modification required.

Technical Specifications

MK05 Series Frame Size Specifications:

• MK05 Displacement Group 5: Displacement 272 cc/rev (16.6 cu.in/rev), theoretical torque at 100 bar 432 N·m (220 lb-ft), max power 22.5 kW (30 HP), max speed 130 rpm, max pressure 400 bar (5,800 PSI)

• MK05 Displacement Group 8: Displacement 447 cc/rev (27.3 cu.in/rev), theoretical torque at 100 bar 711 N·m (361 lb-ft), max power 22.5 kW (30 HP), max speed 80 rpm, max pressure 400 bar (5,800 PSI)

• MK05 Displacement Group 0: Displacement 558 cc/rev (34.0 cu.in/rev), theoretical torque at 100 bar 887 N·m (451 lb-ft), max power 22.5 kW (30 HP), max speed 65 rpm, max pressure 400 bar (5,800 PSI)

• MK05 Displacement Group 2 (This Model Series): Displacement 670 cc/rev (40.9 cu.in/rev), theoretical torque at 100 bar 1,065 N·m (542 lb-ft), max power 22.5 kW (30 HP), max speed 55 rpm, max pressure 400 bar (5,800 PSI)

MK05 Series Common Specifications:

• Series Max Displacement: 670 cc/rev (40.9 cu.in/rev)

• Series Max Torque: 4,265 N·m (3,146 lb-ft)

• Series Max Pressure: 400 bar (5,802 PSI)

• Series Max Power: 22.5 kW (30 HP)

• Series Max Speed: 130 rpm

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

• Bearing Type: Large diameter 4-contact roller bearing

• Control: Single or dual displacement

• Brake: Parking brake optional (F04 multi-disc brake)

• Motor Type: Wheel motor / shaft motor

• Original Design: Poclain Hydraulics, France

MK05-2-124-F04-1340-0000 Additional Specifications:

• Model Code: MK05-2-124-F04-1340-0000

• Manufacturer Part Number: 803044752

• Type: Ultra-compact radial piston motor, internal curve design

• Displacement: Dual displacement configuration (MK05 series group 2, max 670 cc/rev)

• Theoretical Torque at 100 bar: 1,065 N·m (full displacement)

• Max Torque: 4,265 N·m (3,146 lb-ft)

• Max Working Pressure: 400 bar (5,802 PSI)

• Max Power: 22.5 kW (30 HP)

• Max Speed: 55 rpm (at max displacement)

• Brake Type: F04 multi-disc parking brake

• Parking Brake Torque: ~3,500 N·m (2,580 lb-ft, with 0 bar in housing, new brake)

• Brake Release Pressure Range: 12–30 bar (174–435 PSI)

• Mounting Flange: 1340 standard mounting configuration

• Bearing Type: Large diameter 4-contact roller bearing

• 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. Ultra-Compact Direct Drive Design for High Torque in Space-Constrained Environments

The MK05-2-124-F04-1340-0000 features Poclain MK series’ signature ultra-short axial design with a large diameter 4-contact roller bearing capable of directly handling wheel and vibration shaft radial loads without additional bearing support. This makes it an ideal choice for road roller vibration shaft coaxial drives, allowing direct mounting on the vibration shaft to significantly simplify drivetrain architecture. With maximum displacement of 670 cc/rev and maximum torque of 4,265 N·m, the MK05 delivers high power density in a remarkably compact package.

2. Integrated Multi-Disc Parking Brake (F04 Module) for Safe Parking

This model integrates the F04 multi-disc parking brake module with a hydraulically released, spring-applied fail-safe design. The brake provides approximately 3,500 N·m of braking torque with 0 bar in the housing, with a release pressure range of 12–30 bar (174–435 PSI). Static brake torque can be verified before installation to confirm factory performance. This configuration makes the MK05-2-124-F04 particularly suitable for road rollers and construction vehicles requiring reliable parking brakes.

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

The MK05-2 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. The dual displacement configuration enables on-line switching between full and half displacement. The full-displacement mode delivers up to 4,265 N·m maximum torque for heavy-duty startup and vibratory compaction; the half-displacement mode significantly increases speed capability for light-load cruising. The motor operates smoothly even at very low speeds without stick-slip.

4. Large Diameter 4-Contact Roller Bearing and High Radial Load Capacity

The MK05 series features a large diameter 4-contact roller bearing capable of directly handling wheel and vibration shaft radial loads. This design enables direct integration into road roller vibration shaft and wheel-drive systems without additional bearing support mechanisms, simplifying drivetrain design. The motor’s robust construction allows maintenance-free operation at pressures up to 450 bar, with high durability and low maintenance requirements significantly reducing long-term operating costs.

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

Each MK05-2-124-F04-1340-0000 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 MK05 series exactly, enabling direct replacement without pipework or interface modification.

Application Areas

The MK05 series is designed specifically for road rollers and is also widely deployed across the following:

• Road Rollers: double drum asphalt roller vibration shaft coaxial drives, single drum roller wheel drives (Poclain is the market benchmark for double drum roller hydrostatic transmission)

• Construction: excavators, drilling machines, road machinery, special construction vehicles travel drives

• Mining: subsurface equipment drives, mining truck auxiliary drives

• Agriculture: tractor front axles, harvester drive systems

• Material Handling: forklifts, aerial work platforms

• Industrial: winches, conveyor drives, material handling equipment

Expert Maintenance Tips

1. Brake Running-In and Release Pressure Verification: The F04 multi-disc parking brake module requires running-in after installation. Brake release pressure range is 12–30 bar (174–435 PSI). After running-in, perform static brake torque verification to confirm release pressure is within the technical manual range. Abnormally high 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.

2. 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.

3. Mounting Flange Surface Inspection: The MK05-2-124 features 1340 standard mounting configuration. Periodically inspect the output flange plane and wheel/vibration shaft 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 brake friction plate and seal degradation. Replace hydraulic oil and filter after the first 500 hours, then follow a 2,000-hour or annual replacement cycle. 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 MK05-2’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.