Specifications include, but are not limited to: The procurement of Thirteen (13) Mechanical Pickup Broom style Street Sweepers and Three (3) Regenerative Air Style Street Sweepers. The unit shall be designed for use on a commercially manufactured conventional cab or cab-over-engine chassis, minimum 33,000 lbs. Gross Vehicle Weight Rating (GVWR). Purpose-built cab/chassis combination may also be utilized as an option. 4.4.1. A liquid cooled, 260 HP (minimum) 8 liter tier 4 - compliant turbocharged electronic diesel engine shall provide motive power for the chassis and sweeper body requirements. 4.4.2. Option: Alternative CNG fuel chassis engine. 4.4.3. Option: Larger engine HP per agency choice. 4.4.4. Automatic transmission - contractor may select to optimize motive power and torque for the sweeper package bid. Magnetic drain plug shall be installed in the transmission. Allison 3500 series 5-speed transmission with PTO and push button electronic controls is preferred. Air/oil cooler is preferred for transmission but not required. Option: Manufacture may provide hydrostatic drive option rather than Allison transmission. 4.4.5. Option: Warranty extended beyond manufacturer’s standard for engine and transmission.