Caterpillar 227-0172 Mounting Sandwich — Mid-Size Compactor Drum Mount

Overview: What Is the 227-0172 Mounting Sandwich?

The Caterpillar 227-0172 Mounting Sandwich (also written as 2270172) is the primary vibration isolation mount used on Cat mid-size vibratory soil compactors and combination rollers. This part sits between the vibratory drum bearing housings and the yoke frame, absorbing the cyclic forces generated by the drum's eccentric shaft while supporting the static weight of the drum assembly. It is constructed from industrial-grade rubber permanently bonded to upper and lower steel plates through hot vulcanization.

The 227-0172 covers a broad range of Caterpillar compactors in the 8,000 to 15,000 kg operating weight class. This includes popular models like the CS-56 and CS-64 smooth drum compactors, the CP-54B and CP-64 padfoot compactors, and the CB-334D/E combination rollers. These machines are workhorses on highway construction projects, airport runway paving, residential subdivisions, and municipal road maintenance operations throughout the United States and worldwide.

Unlike the larger 358-0286 which serves Cat's heavy compactors (CS-79B/CS20 class), the 227-0172 has a smaller footprint and lower mass to match the reduced centrifugal forces and drum weights of mid-range equipment. The rubber compound durometer and geometry are tuned specifically for the vibration frequency range and amplitude of these machines, providing optimal isolation efficiency without the risk of bottoming out under peak loading conditions.

Technical Specifications

Compatible Caterpillar Models

The 227-0172 mounting sandwich fits a wide range of Cat mid-size vibratory compactors. The table below lists all compatible machines organized by type.

How Mounting Sandwiches Work in Mid-Size Compactors

Mid-size Cat compactors like the CS-56 and CS-64 operate with drum vibration frequencies typically between 30 and 42 Hz, with centrifugal forces ranging from 100 to 280 kN depending on the amplitude setting. The 227-0172 mounting sandwich is engineered to provide effective vibration isolation across this entire operating envelope.

The rubber element in the mount deforms with each vibration cycle, absorbing energy through internal friction (hysteresis). This energy conversion from mechanical vibration to heat prevents the majority of vibratory force from transmitting through the yoke frame into the machine chassis. Effective isolation protects the engine, transmission, hydraulic components, cab structure, and most critically the operator from harmful whole-body vibration exposure.

On machines with dual-amplitude systems, the mounting sandwiches experience significantly different loading between high and low amplitude modes. The 227-0172 rubber compound is formulated to perform consistently across both settings without excessive deflection at high amplitude or insufficient isolation at low amplitude. This dual-mode performance is critical for machines that alternate between thick-lift earthwork (high amplitude) and thin-lift asphalt overlay (low amplitude) within the same work shift.

Installation Considerations

Replacing the 227-0172 mounting sandwiches follows the same general procedure as the 358-0286 installation process, with the primary difference being the lighter drum weights involved. Key points specific to mid-size machines include:

• Mid-size compactor drums typically weigh 3,000-5,000 kg, requiring appropriately rated lifting equipment.
• Always replace mounting sandwiches as a complete set (all mounts on one drum). Mixing new and worn mounts creates unbalanced vibration isolation.
• Check mounting bolt torque specifications in your machine-specific service manual, as values differ between CB-334 class and CS-64 class machines.
• Inspect drum bearing condition while mounts are removed. Bearing replacement access is significantly easier with the drum disconnected.
• On CB-334D/E combination rollers, ensure you are replacing the correct mounts, as these machines have different mounting configurations for front and rear drums.

Maintenance Schedule

Inspect the 227-0172 mounting sandwiches every 2,000 operating hours. Mid-size compactors used in asphalt paving applications often accumulate hours more slowly than soil compactors, so calendar-based inspection (every 12 months minimum) should supplement hour-based intervals. Look for rubber cracking, delamination from steel plates, permanent compression set, and oil contamination from hydraulic leaks. Read our complete warning signs guide for detailed inspection criteria.

Cross-Reference: 227-0172 vs Related Parts

See the complete Cross-Reference Chart for all model-to-part mappings.

Frequently Asked Questions