4951000331, 4-951000331 COUPLING AMMANN

Overview

The 4-951000331 Coupling Ammann is a high-performance flexible coupling engineered for Ammann heavy machinery drive systems. It transmits torque smoothly between the engine and hydraulic pump while absorbing vibration and misalignment. Constructed with precision-molded elastomeric segments and reinforced metal inserts, this coupling ensures reliable power transfer, reduced mechanical stress, and extended drivetrain life. Supplied by 3GEN Export as an OEM-standard replacement, the 4-951000331 Coupling Ammann provides perfect compatibility with Ammann rollers, compactors, and pavers. Its robust, temperature-resistant material delivers consistent damping performance even under continuous high-load operation, making it ideal for demanding construction environments worldwide.

Function and Importance

A coupling is one of the most critical components in a compactor’s powertrain. The 4-951000331 Coupling Ammann connects the engine output shaft to the hydraulic pump input, allowing torque transmission while compensating for angular, radial, and axial misalignments. It absorbs torsional vibrations and shock loads produced by sudden speed changes or engine pulsations, protecting connected equipment from premature wear or failure.

• Absorbs torsional vibration and torque fluctuations.
• Reduces load peaks on hydraulic pumps and engines.
• Ensures smooth power transfer and stable operation.
• Protects drivetrain components from mechanical shock.
• Maintains alignment tolerance and easy assembly.

Construction and Materials

The 4-951000331 Coupling Ammann is built using a modular rubber-in-compression design, combining elastic and metallic elements for optimal flexibility and load distribution. The inner metal inserts provide mechanical strength, while the flexible polymer segments absorb vibrations. This design eliminates the need for lubrication and allows maintenance-free service throughout its operational life.

• Core Material: High-grade polyurethane elastomer for elasticity and temperature resistance.
• Insert Material: Hardened steel coupler hubs with anti-corrosion treatment.
• Configuration: Star-type or spider-type flexible coupling with eight bonded elements.
• Color: Beige elastomer segments with grey metallic inserts for easy identification.
• Design Life: Exceeds 10,000 operating hours under normal compaction loads.

Technical Specifications

Part Number	4-951000331
Alternative PN	4951000331
Part Name	Flexible Coupling
Brand	Ammann
Application	Engine-to-pump drivetrain connection
Material	Polyurethane elastomer and hardened steel hubs
Outer Diameter	190 mm (approx.)
Bore Size	25 – 30 mm (center bush adaptable)
Weight	2.9 kg (≈ 6.4 lbs)
Torque Capacity	Up to 220 Nm
Operating Temperature	−35 °C to +120 °C
Dynamic Hardness	80 ± 5 Shore A
Vibration Damping	High torsional and radial absorption efficiency

Compatible Ammann Models

The 4-951000331 Coupling Ammann is widely used across Ammann compaction and paving machines that rely on hydraulic drive systems. Commonly compatible models include:

• Ammann ARX 12 / ARX 16 / ARX 20 Light Tandem Rollers
• Ammann AV 26-2 / AV 70 / AV 95 Asphalt Rollers
• Ammann ARP 95 / ARP 120 Pivot-Steer Rollers
• Ammann ASC 70 / ASC 90 / ASC 110 Soil Compactors
• Ammann APH 6020 / APH 6520 Reversible Plate Compactors

This coupling fits various engine and hydraulic pump combinations used in Ammann machines, ensuring stable operation and minimal vibration transfer even under heavy-duty torque conditions.

Installation and Maintenance

Installation of the 4-951000331 Coupling Ammann is simple and requires only standard workshop tools. Follow the manufacturer’s alignment and tightening procedures to ensure optimal performance and longevity.

1. Inspect the engine and pump shaft ends for cleanliness and free rotation.
2. Align both shafts axially to within 0.2 mm tolerance.
3. Insert the coupling hubs on each shaft and secure with set screws or keys.
4. Position the elastomer element between hubs and tighten fasteners to specified torque.
5. Run the machine at low RPM to verify alignment before full load operation.

The coupling requires no grease or oil lubrication. Periodic visual inspection is recommended every 500 hours to check for elastomer fatigue, cracks, or hardening. Replace if any signs of wear are visible to prevent power loss or vibration increase.

Performance Benefits

Vibration Isolation and Shock Absorption

The elastic segments of the 4-951000331 Coupling Ammann absorb torsional shocks and vibration peaks, minimizing stress on connected components and ensuring smooth power delivery.

Extended Component Life

By eliminating direct metal-to-metal contact, this coupling protects shafts, bearings, and gear systems from premature fatigue and reduces the need for frequent alignment adjustments.

Maintenance-Free Operation

Manufactured from self-damping materials, the coupling operates without lubrication and requires no periodic servicing. This reduces operating costs and increases machine uptime.

Applications

• Asphalt and soil compaction rollers
• Hydraulic driven pavers and plate compactors
• Vibration-intensive construction equipment
• Machinery requiring torsional damping for drive systems

Quality Assurance

Each 4-951000331 Coupling Ammann provided by 3GEN Export undergoes dimensional inspection, hardness verification, and torsional fatigue testing before shipment. All units are manufactured under ISO 9001-certified conditions to ensure uniform quality and performance consistency. Advanced elastomer formulation techniques and precision metal casting ensure excellent bond strength and temperature resistance. The result is a durable coupling capable of withstanding continuous vibration and shock loads typical of Ammann machines.

Packaging and Logistics

Each coupling is individually packed in foam-padded boxes and labeled with part number and traceability barcode. Shipments are sealed against moisture and dust for safe global transport. 3GEN Export offers worldwide delivery within 5 working days, ensuring fast replacement turnaround for maintenance and service operations anywhere in the world.

Why Choose 3GEN Export

• OEM-standard couplings compatible with Ammann machinery.
• High torsional flexibility and vibration absorption capability.
• Durable polyurethane construction with precision steel hubs.
• Competitive pricing and global availability.
• Guaranteed delivery within 5 working days worldwide.

As a leading Marketplace of Heavy Machinery Spare Parts, 3GEN Export provides contractors, fleet owners, and distributors with premium-grade spare parts that meet OEM specifications for durability and reliability.

Internal Links

Explore our full selection of Ammann Spare Parts and discover other Flexible Couplings and Drive Components for your compaction equipment.

Weight

2.9 kg (6.4 lbs)

Summary

The 4-951000331 Coupling Ammann is a durable and efficient drive system component designed for Ammann rollers and compact equipment. Combining flexibility, torque stability, and vibration control, it ensures reliable operation and reduced maintenance costs. Available now from 3GEN Export , your trusted OEM supplier with worldwide delivery in just 5 working days.  

Manufactured in Turkey, these products are made using the latest technologies and built to meet the highest international standards. Each machine is a high-quality copy of the original, ensuring durability, precision, and performance that you can rely on for modern construction and metalworking projects.