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Oshkosh Defense Awarded Contract and First Delivery Order for HEMTT A2 Engines

OSHKOSH, Wis. — June 25, 2009 — Oshkosh Defense, a division of Oshkosh Corporation (NYSE:OSK), has been awarded an indefinite delivery / indefinite quantity contract from the Defense Logistics Agency (DLA) to supply the U.S. Army with a minimum of 100 engines and a three-year maximum of 525 for the Heavy Expanded Mobility Tactical Truck (HEMTT) A2.

Under the contract, potentially valued at more than $31 million, Oshkosh Defense Aftermarket will provide the Army with the HEMTT A2’s 8V92TA DDEC engine. Work is expected to be completed by June 2012. The first delivery order for 100 engines has been awarded and is valued at more than $5 million.

“Oshkosh Defense Aftermarket’s FAST Parts and Services Network provides our military customers with an extensive parts supply to help keep their fleets at peak readiness,” said Mike Ivy, Oshkosh Defense vice president of Aftermarket. “With field service representatives stationed around the world and a broad range of services available any minute of the day, our Aftermarket capabilities provide support anytime, anywhere.”

With factory-trained technicians, Web-based parts support and service centers worldwide, Oshkosh customers are covered 24/7 whether their vehicles are in the field or in garrison.

The Army has fielded more than 20,000 HEMTTs since Oshkosh began its production in 1982. Even as the Army fields the latest version of this heavy tactical truck, the A4, Oshkosh continues supporting the earlier versions, including the A2. Oshkosh support for these trucks will continue through their life cycle.

The next-generation HEMTT A4 features a fully air-conditioned and armor-ready cab, more powerful drivetrain, upgraded suspension, safety improvements, and other enhancements. The vehicles are long term armor strategy (LTAS) compliant and come off the assembly line fitted with upgraded suspensions and integral (“A” kit) armor. They also will be ready to receive an add-on (“B” kit) armor appliqué that can be quickly and easily installed in the field.

About Oshkosh Defense

Oshkosh Defense, a division of Oshkosh Corporation, is an industry-leading global designer and manufacturer of tactical military trucks and armored wheeled vehicles, delivering a full product line of conventional and hybrid vehicles, advanced armor options, proprietary suspensions and vehicles with payloads that can exceed 70 tons. Oshkosh Defense provides a global service and supply network including full life-cycle support and remanufacturing, and its vehicles are recognized the world over for superior performance, reliability and protection. For more information, visit oshkoshdefense.com.

About Oshkosh Corporation

Oshkosh Corporation is a leading designer, manufacturer and marketer of a broad range of specialty access equipment, commercial, fire & emergency and military vehicles and vehicle bodies. Oshkosh Corp. manufactures, distributes and services products under the brands of Oshkosh®, JLG®, Pierce®, McNeilus®, Medtec®, Jerr-Dan®, BAI®, Oshkosh Specialty Vehicles, Frontline™, SMIT™, Geesink™, Norba™, Kiggen™, CON-E-CO®, London® and IMT®. Oshkosh products are valued worldwide in businesses where high quality, superior performance, rugged reliability and long-term value are paramount. For more information, log on to www.oshkoshcorporation.com.

®, ™ All brand names referred to in this news release are trademarks of Oshkosh Corporation or its subsidiary companies.