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Sakai’s Most Valuable Players: Heavy Hitters on Dirt

Tue July 01, 2008 - National Edition
Construction Equipment Guide

Sakai’s new line up of heavy-duty dirt rollers feature enhancements designed to help earthmoving contractors move more material faster.

Included in this group of products is the SV510-III Series, a line of 84-in. (213 cm) single drum compactors with a choice of drum types and options that bring this line to a new level. These compactors are designed for high yardage compaction jobs on a wide range of soil types and rockfill — highway and airport subbases, embankments, dams, reservoirs, and large commercial tracts.

The SV510-III Series comes in four model variations to suit the end user’s needs. A smooth drum model, the SV510D-III, is designed for rock and granular materials while its sister, the padfooted SVT10T-III is most useful on cohesive materials, silts and clays. This latter model also is available as a TB version with a strike-off blade that eliminates the need for additional backfilling equipment and labor.

The TF version includes a padfoot drum encased within a bolt-on smooth drum shell that can be removed when working on cohesive soils. Unlike other “combination” models on the market, this design keeps the diameter of the padfoot at optimum size when the smooth shell is removed. This design consideration enables a drive system without the surges presented by the alternative method — that of a padfoot shell over a smooth drum.

With high centrifugal forces and amplitudes to 0.09 in. (0.23 cm), these machines can make quick work of materials placed in even the thickest lifts, according to the manufacturer.

All models come standard with dual amplitude, a productive feature on applications such as soil cement.

A new traction control system on all models in the series provides increased gradability on slopes up to 62 percent, making them excellent sources of compaction power in large trenches and up steep embankments.

The steering system of the SV510-III machines centers on the center point of the articulated hitch. With an average of more than 12,000 lbs. (5,443 kg) connected to either side of the hitch, this becomes a key safety factor that other manufacturers sometimes choose to ignore. The system consists of taper roller bearings for articulation and a large ball bearing for oscillation.

The Sakai shock isolation systems are completely independent of the drum drive system. Located between the chassis frame and the drum drive motor, the shock isolators reduce the transmission of vibration back to critical machine components and the operator.

Other machines place the shock isolators between the drum and the drive motor — meaning these isolators wear out faster because the drive torque is transferred to the drum through the rubber isolators whether the vibration system is on or off. This wear then causes the machine to jerk with changes in direction, resulting in an irregular or rough compaction surface, according to Sakai.

The SV510-III Series machines are powered by a Tier III, 148-hp (110 kW) Cummins Model QSB4.5 water-cooled, turbocharged diesel engine. This engine provides high fuel efficiency and fully complies with current EPA/CARB emission standards. This turbocharger has plenty of power in reserve and has shown high performance, even at high elevations. The engine is mounted on rubber isolators to provide added vibration protection.

The SV510-III Series is equipped with a two brake, three-way fail-safe system. A hydrostatic service brake is located at the forward-reverse lever. A wet disc, spring-applied, hydraulically-released (SAHR) parking brake switch is located on the instrument panel. An emergency brake foot pedal activates both the hydrostatic and the SAHR brakes, and will automatically apply in the event of an engine or hydraulic system failure.

ROPS and seat belts are standard equipment on every Sakai roller sold in North America.

For more information, call 800/323-0535 or visit

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