This document provides a lubrication and maintenance service interval chart for 9.0 L Marine Diesel Engines. It lists maintenance items that should be checked or replaced daily, every 250 hours, 500 hours, 2000 hours, 4500 hours, and 6000 hours of engine operation. This is Complete Operator’s Manual for John Deere POWERTECH 4.5 L & 6.8 L 4045 and 6068 Marine Diesel Engines. Your machine has been designed and built to the highest standards of quality. It conforms to all current safety regulations. However, the risk of accidents can never be completely excluded. Reference specifications, configuration, application and service information for the John Deere 6068 marine diesel engine family from Hall Engine Company. John Deere Powertech 4.5L & 6.8L 4045, 6068 Marine Diesel Engines Operators Manual (OMRG28997), JD Agricultural manual for owners, technicians. Quick digital delivery. Select your John Deere Marine engine series to view the recommended maintenance schedule and service intervals. Service interval guides for John Deere Marine marine diesel engines. Oil change intervals, filter replacement, impeller service, and maintenance… The John Deere Marine manual cited on this page sets John Deere PowerTech 6068 Marine service work at 250, 500, 1500, 2000, 4500, and 6000 engine hours. The tasks for each interval are listed above. Adhering to factory-recommended service intervals is critical to prevent premature engine wear, hydraulic failure, and costly downtime. Choose your equipment line: Engine Oil and Filter Service Intervals — Tier 3 and Stage IIIA — Marine EnginesRecommended oil and filter service intervals are basedon a combination of oil pan capacity, type of engine oil• “Plus-50 Oils” include John Deere Plus-50™ II andJohn Deere Plus-50™ or “Other Oils” with approvedand filter used, and sulfur content of. When John Deere PLUS-50 , ACEA E5, or ACEA E4 oils are used with the specified John Deere filter, the service interval for engine oil and filter changes may be increased by 50% but not to exceed a maximum of 500 hours. Extended service intervals may apply when John Deere Plus-50™ II engine oil is used. Refer to the engine oil drain interval table and consult your John Deere dealer for more information.