Foreword

THIS MANUAL CONTAINS INFORMATION to operate and service PowerTech Plus 4.5 L and 6.8 L Tier 3 / Stage IIIA emission-certified ¹ OEM engines:

IMPORTANT: Some information contained within this manual refers to engines that are capable of running on aviation (jet) fuels. These engines are specifically ordered and outfitted with special hardened components and fuel dosing element(s) that make the engine capable of using these fuels.

CAUTION: Engines NOT ordered and outfitted with these special components are NOT capable of using aviation (jet) fuels. If you have any questions, please contact your local servicing dealer.

READ THIS MANUAL carefully to learn how to operate and service your engine correctly. Failure to do so could result in personal injury or equipment damage.

THIS MANUAL SHOULD BE CONSIDERED a permanent part of your engine and should remain with the engine when you sell it.

MEASUREMENTS IN THIS MANUAL are given in both metric and customary U.S. unit equivalents. Use only correct replacement parts and fasteners. Metric and inch fasteners may require a specific metric or inch wrench.

WRITE ENGINE SERIAL NUMBERS and option codes in the spaces indicated in the Record Keeping Section. Accurately record all the numbers. Your dealer also needs these numbers when you order parts. File the identification numbers in a secure place off the engine.

SETTING FUEL DELIVERY beyond published factory specifications or otherwise overpowering will result in loss of warranty protection for this engine.

CERTAIN ENGINE ACCESSORIES such as radiator, air cleaner, and instruments are optional equipment on John Deere OEM Engines. These accessories may be provided by the equipment manufacturer instead of John Deere. This operator's manual applies only to the engine and those options available through the John Deere distribution network.

IMPORTANT: This manual covers only the PowerTech™ Plus Tier 3 / Stage III A emission-certified 4.5 L and 6.8 L OEM engines. These engines meet Tier 3 / Stage III A emission certification standards. (This is for both the U.S. EPA and European Union Council (EU) standards.) Engines with mechanical controls which are non-emission certified or Tier 1 / Stage I emission certified (U.S. and EU) are covered in a separate operators manual. Engines which are Tier 2 / Stage II emission-certified are covered in a separate operators manual.. Engines which are PowerTech™ E Tier 3 / Stage IIIA emission-certified are covered in a separate operators manual.

NOTE: This manual covers engines provided to OEM (Original Equipment Manufacturers). For engines in Deere machines, refer to the machine operator's manual.