Volvo SD115 compactor weighs 25,690 pounds and has been upgraded to Tier 4-Interim compliance with Volvo engines: either a four-cylinder, 147.5-horsepower version or six-cylinder, 173-horsepower unit. The operator can adjust amplitude from the control panel, and can also choose two drum frequencies with a five-freqency feature optional. A center joint allows 38 degrees of articulation and 17 degree of drum oscillation for the 84-inch drum.