Dynapac has upgraded its F1000 series tracked and wheeled asphalt pavers with Tier 4-Interim Cummins QSB 6.7-liter diesels. Dynapac has adjusted the paver duty cycle to allow DPF regeneration without disturbing the paving operation in most conditions. Horsepower ratings are 220 at 2,000 rpm, or 230 at 1,800 rpm, and a high-pressure fuel injection system cuts fuel consumption up to 5 percent. Cross-flow cooling system has a hydraulically driven, temperature-dependent cooling fan that reduces the overall noise level.