MK05-2-124-F04-1340-0000 Poclain Motor 670cc 400bar

Product Overview

The MK05-2-124-F04-1340-0000 is a mid-displacement radial piston hydraulic motor from the Poclain Hydraulics MK compact motor series, MK05 frame size. The motor employs a radial piston cam-lobe design, integrating high torque output into an exceptionally compact housing, making it ideal for wheel motor or tool drive applications. The MK05 series offers a maximum displacement of 670 cc/rev, maximum power of 22.5 kW (30 HP), maximum torque of 4265 N·m (3146 lb-ft), maximum working pressure of 400 bar (5,802 PSI), and maximum speed of 130 rpm. The MK05-2-124-F04-1340-0000 specifically offers a displacement of 670 cm³/rev, theoretical torque of 1065 N·m at 100 bar, and weight of approximately 34 kg.

The MK05 series is specifically designed for road rollers and also finds application in mining, agriculture, environmental, and other markets, with its compact direct-drive design making it ideal for wheel motor or tool drive applications. The MK compact motor series covers MK04, MKD04, MK05, MK08, MK09, MK12, MKE12, MK18, MKE18, MK23, MK35, and MK47 frame sizes, with displacements from 272 cc/rev to 2812 cc/rev, primarily serving construction equipment, mining, agriculture, environment, material handling, railway, marine, and industrial applications.

The model code decodes as: “MK05” = MK compact series 05 frame size, “2” = second-generation design, “124” = displacement group (670 cc/rev), “F04” = F04 flange mounting, “1340” = wheel-mount interface configuration code, “0000” = additional function and port configuration code. The MK05-0-124-F07-1340-0000 in the original title is a radial flange variant (F07) within the same series, differing in mounting interface but sharing identical core hydraulic parameters.

The motor offers complete interchangeability: mounting flange, output shaft, and port configuration are identical to the original Poclain specification, enabling drop-in replacement without hose or bracket modification. Every unit undergoes 100% simulated duty-cycle testing before shipment.

Series-Related Models: MK04 offers a maximum displacement of 408 cc/rev, maximum power of 18 kW, maximum torque of 2600 N·m, and maximum speed of 120 rpm. MK08/MK09 offers a maximum displacement of 1000 cc/rev, maximum power of 30 kW, and theoretical torque of 1061 N·m at 100 bar. MK35 and MK47 are mid-large and large displacement frame sizes within the MK series for higher torque applications.

Technical Specifications

MK05-2-124-F04-1340-0000 (Primary Model)

• Model: MK05-2-124-F04-1340-0000

• Brand Series: Poclain Hydraulics MK Series / MK05

• Motor Type: Radial piston compact, low-speed high-torque

• Displacement: 670 cm³/rev (40.9 cu.in/rev)

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

• Theoretical Torque (@100 bar): 1065 N·m (542 lb-ft)

• Maximum Output Torque: 4265 N·m (3146 lb-ft)

• Maximum Power: 22.5 kW (30 HP)

• Maximum Speed: 130 rpm

• Mounting Flange: F04

• Mounting Configuration Code: 1340 (wheel-mount interface)

• Additional Configuration Code: 0000

• Rotary Group Inertia: 0.1 kg·m²

• Brake Options: Optional multi-disc parking brake / service brake

• Mounting Type: Wheel mount / shaft mount

• Operating Temperature Range: -20°C to +80°C (reference: MK series general data)

MK05-0-124-F07-1340-0000 (Series Reference — Radial Flange Variant)

• Model: MK05-0-124-F07-1340-0000

• Brand Series: Poclain MK Series / MK05

• Displacement: 670 cm³/rev

• Mounting Flange: F07 (radial connection)

• Configuration Code: 1340-0000

• Core Hydraulic Parameters: Same as F04 version (max pressure 400 bar, max torque 4265 N·m)

MK05 Series Displacement Variants (Series Reference)

• MK05 displacement 272 cm³/rev: Theoretical torque 432 N·m @100 bar, max power 22.5 kW, max speed 130 rpm

• MK05 displacement 447 cm³/rev: Theoretical torque 711 N·m @100 bar, max speed 80 rpm

• MK05 displacement 558 cm³/rev: Theoretical torque 887 N·m @100 bar, max speed 65 rpm

• MK05 displacement 670 cm³/rev: Theoretical torque 1065 N·m @100 bar, max speed 55 rpm

Note: MK05 series variant parameters are compiled from the Poclain MK05 official technical datasheet.

MK04 (Series Reference)

• Maximum Displacement: 408 cc/rev

• Maximum Power: 18 kW (24 HP)

• Maximum Torque: 2600 N·m

• Maximum Working Pressure: 400 bar

• Maximum Speed: 120 rpm

• Mounting Type: Wheel mount / shaft mount

• Features: Ultra-short structure, large-diameter four-point contact ball bearing

MK09 (Series Reference)

• Maximum Displacement: 1000 cc/rev

• Maximum Power: 30 kW (40 HP)

• Theoretical Torque (@100 bar): 1061 N·m

• Maximum Working Pressure: 400 bar

• Maximum Speed: 100 rpm

MK35 / MK47 (Series Reference)

• MK35: Mid-large displacement frame size in the MK compact series for high-torque drive applications

• MK47: Large displacement frame size in the MK compact series, with maximum displacement approaching 2812 cc/rev

Key Technical Advantages

① Radial Piston Cam-Lobe Design — High Power Density with Compact Structure

The MK05-2-124-F04-1340-0000 utilizes Poclain’s tried and tested radial piston cam design, which is continually being improved. Working cylinders arranged radially around a crankshaft deliver torque up to 4265 N·m at extremely low speeds (as low as 130 rpm) without requiring reduction gearing. MK series motors combine high power density with compact dimensions; maximum torque is increased compared to previous generations, with improved overall efficiency and reduced internal leakage. For road roller vibratory drum drives, skid steer loader wheel drives, and similar applications, this design minimizes installation space requirements while maintaining high torque output.

② Ultra-Short Structural Design with Large-Diameter Four-Point Contact Ball Bearing — Accommodates Constrained Installation Spaces

The MK05 series features an ultra-short structural design with a large-diameter four-point contact ball bearing, compressing the motor‘s axial dimensions to the extreme. The four-point contact ball bearing simultaneously accommodates radial and axial combined loads, offering significant advantages in road roller vibratory drum drives and other applications with combined radial and axial loading. The ultra-short structure enables direct integration of the motor into wheel hubs or tool drive shafts, significantly reducing overall drivetrain dimensions. MK motors are particularly suited for mounting on vibratory equipment, thanks to their large central hollow shaft design.

③ Integrated Brake System and TwinLock™ Anti-Skid Function — Safe Parking and Traction Optimization

The MK05 series offers multiple integrated brake options including emergency brake, service brake, and parking brake. The negative-type multi-disc parking brake works in conjunction with the motor’s distribution module, automatically engaging at stop and releasing at start, and engaging automatically in the event of hydraulic pressure loss or failure to prevent rollback on slopes. The MK series also offers the optional Poclain-patented TwinLock™ integrated anti-skid system, which automatically distributes flow between the two displacement chambers of the two-speed motor; when one wheel loses traction, the system transfers torque to the wheel with grip, significantly improving vehicle mobility on low-traction surfaces such as mud, sand, or slopes.

④ High Resistance to Variable Loads and Long-Life Design

MK05 series motors feature a reinforced housing structure specifically designed to withstand high variable loads and shock loads, suitable for high-impact operations such as road roller vibratory compaction. High-strength castings with internal reinforcement ribbing enhance overall casing rigidity and deformation resistance. The large-diameter four-point contact ball bearing offers load capacity far exceeding conventional bearing configurations, effectively preventing premature bearing failure in heavy-duty applications such as road roller travel drives, extending motor overhaul intervals. The MK compact motor achieves power density up to 22.5 kW within its exceptionally compact housing.

⑤ Broad Interchange Compatibility and Series Selection

The MK05-2-124-F04-1340-0000‘s standardized mounting interface (F04 flange) allows direct replacement of equivalent Poclain original motors. The MK compact motor series offers complete displacement coverage from MK04 (408 cc) to MK47 (2812 cc), enabling users to precisely select displacement size based on specific application torque, speed, and flow requirements. Standardized interface design maintains mounting compatibility across different displacement sizes within the same series, facilitating equipment upgrades or displacement adjustments. The MK series also offers optional speed sensors (T4/TR/TD types) for closed-loop control systems.

Application Areas

• Compaction Equipment (Primary Application): Bomag BW120 AD-3, BW138 AD, BW154 and similar vibratory road roller travel drives; Dynapac, Caterpillar road rollers

• Construction Equipment: Mini excavators, skid steer loaders, compact wheel loaders

• Mining Equipment: Underground LHDs, mining truck travel drives

• Agricultural Machinery: Tractors, combine harvesters, seeders

• Material Handling: Forklifts, telehandlers, port tractors

• Railway Equipment: Track maintenance vehicle travel drives

• Environmental Equipment: Municipal sweepers, garbage compaction trucks

• Industrial Applications: Compact hydraulic transmission systems requiring low-speed high-torque direct drive

Expert Maintenance Tips

Pre-Installation Inspection: Verify flatness and cleanliness of the F04 flange mating surface; check thread condition of mounting bolt holes. For wheel-mount (1340 configuration) applications, ensure wheel hub-to-output flange coaxiality within 0.05 mm; excessive misalignment causes bearing edge loading and premature seal wear. Use bolts of strength class 8.8 or higher, tightened in diagonal sequence to specified torque.

First Commissioning: The motor casing must be filled with clean hydraulic oil before initial start-up. Fill through the highest casing port until oil overflows from the level port. Dry starting causes metal-to-metal contact between piston-to-cam ring surfaces and the valve plate without lubrication, resulting in irreversible damage. For MK05 models equipped with integrated brakes, confirm the brake circuit has been properly bled to avoid delayed brake release.

Fluid Cleanliness: Maintain system oil cleanliness at NAS 8 (ISO 4406 18/16/13) or better. The radial piston motor’s valve plate and piston pairs are sensitive to particulate contamination; excessive contamination accelerates wear and causes volumetric efficiency degradation. Inspect return filter elements regularly and replace per the machine manufacturer‘s recommended interval.

Scheduled Inspection: Check casing drain flow and brake clearance every 500 operating hours. Under normal conditions, drain flow should remain stable; a sustained increase indicates accelerated wear of piston pairs or valve plate surfaces, and preventive maintenance should be scheduled. Inspect the output flange area for oil seepage; replace seals at the first sign of degradation. For road roller applications, pay particular attention to mounting bolt tightness under vibratory conditions, periodically rechecking torque.

Long-Term Storage Protection: If the motor will be idle for more than 3 months, fill the casing with rust-preventive hydraulic oil and manually rotate the shaft several turns monthly to prevent corrosion or adhesion on piston-to-cam ring interfaces and valve plate surfaces. Perform a no-load run-in before returning to service.