MK04-2-114-K04-3340-3000 Poclain Motor | 400 Bar 408cc

Product Overview

The MK04-2-114-K04-3340-3000 is a MK04 frame size ultra-compact radial piston hydraulic motor from Poclain Hydraulics’ MK series, featuring a displacement of 408 cc/rev, integrated parking brake, manufacturer part number 005643865L and weight of approximately 31.0 kg. This model is the original equipment travel motor for Bomag BW120 AD-3 and similar road rollers, engineered specifically for compactor vibration shaft coaxial drives and wheel-drive applications.

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 MK04 frame size delivers maximum displacement of 408 cc/rev, maximum power of 18 kW (24 HP), maximum torque of 2600 N·m (1918 lb-ft) and maximum speed of 120 rpm. Designed specifically for compactor drive applications, the MK04 series also serves mining, agricultural, environmental and other markets.

Every MK04-2-114-K04-3340-3000 unit undergoes 100% simulated operating-condition bench testing prior to shipment. Mounting flange, shaft end and port dimensions match the original Poclain MK04 series exactly, enabling true drop-in interchangeability with zero modification required.

Technical Specifications

MK04 Series Frame Size Specifications:

• MK04-8: Displacement 272 cc/rev (16.6 cu.in/rev), theoretical torque at 100 bar 432 N·m (220 lb-ft), max speed 120 rpm

• MK04-0: Displacement 340 cc/rev (20.7 cu.in/rev), theoretical torque at 100 bar 541 N·m (275 lb-ft), max speed 110 rpm

• MK04-2 (This Model): Displacement 408 cc/rev (24.9 cu.in/rev), theoretical torque at 100 bar 649 N·m (330 lb-ft), max speed 100 rpm

MK04-2-114-K04-3340-3000 Additional Specifications:

• Model Code: MK04-2-114-K04-3340-3000

• Manufacturer Part Number: 005643865L

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

• Displacement: 408 cc/rev (24.9 cu.in/rev)

• Theoretical Torque at 100 bar: 649 N·m (330 lb-ft)

• Max Torque: 2,600 N·m (1,918 lb-ft)

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

• Max Power: 18 kW (24 HP)

• Max Speed: 100 rpm (at max displacement)

• Brake Type: Integrated parking brake (spring-applied, hydraulically released)

• Brake Release Pressure Range: 17–30 bar (246.6–435 PSI)

• Mounting Flange: Ø204.9 mm chassis mounting, 7×M12×1.75 screws

• Tightening Torque: 12.9 N·m

• Motor Inertia: 0.028 kg·m²

• Weight: ~31.0 kg

Key Technical Advantages

1. Ultra-Compact Direct Drive Design with Large Diameter 4-Contact Roller Bearing

The MK04-2-114 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.

2. Integrated Parking Brake for Safe Parking

This model integrates a parking brake with a spring-applied, hydraulically released fail-safe design. The brake automatically locks when system pressure is lost, ensuring safe machine parking.

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

The MK04-2-114 employs Poclain’s patented internal curve radial piston design. Theoretical torque at 100 bar reaches 649 N·m with maximum torque of 2,600 N·m, operating smoothly across the 0–100 rpm speed range without stick-slip.

4. 100% Simulated Load Testing & Drop-In Interchangeability

Each unit is bench-tested under simulated operating conditions prior to dispatch. Mounting flange, shaft end and port dimensions match the original Poclain MK04 series exactly.

Application Areas

• Road Rollers: Bomag BW120 AD-3 and similar vibratory roller travel and vibration shaft drives (OEM application)

• Milling Machines: milling machine travel drives

• Construction: compactors, light-duty road roller drive systems

• Agriculture: vineyard autonomous robot track drives

• Material Handling: compact aerial work platform drives

• Municipal: compact street sweepers, snow removal equipment

Expert Maintenance Tips

1. Brake Running-In and Release Pressure Verification: Minimum brake release pressure is 17 bar, maximum 30 bar. Running-in is required after installation, followed by static brake torque verification.

2. Chassis Mounting Surface Inspection: Ø204.9 mm chassis mounting with 0.2 mm flatness and Ra 12.5 μm surface roughness requirements. Tighten 7×M12×1.75 screws evenly in a diagonal sequence to 12.9 N·m.

3. Housing Priming Before First Startup: Fill the motor housing with clean hydraulic oil (HV46 recommended) through the drain port before first startup.

4. Oil Cleanliness and Temperature Control: Maintain system oil cleanliness at ISO 4406 18/16/13 or better. Operating temperature below 80°C.