Photographs may show non-standard equipment

PERFORMANCE CURVE

PERFORMANCE DATA

Rated SpeedIntermittent

Peak PowerPower Bulge %

Peak TorqueTorque Rise %

RATED BHP is the power rating for variable speed and loadapplications where full power is required intermittently.

CONTINUOUS BHP is the power rating for applications operatingunder a constant load and speed for long periods of time.

HEAVY DUTY - see application ratings/definitions, engineperformance curves.

POWER OUTPUT is withing + or - 5% at standard SAE J 1995 andISO 3046.

CERTIFICATIONS: EPA Tier 3, EU STAGE III A AND CARB

173 hp (129 kW) @ 2400 rpm

173 hp (129 kW) @ 2400 rpm0% @ 2400 rpm

492 lb-ft (667 N.m) @ 1500 rpm30% @ 1500 rpm

John Deere Power Systems3801 W. Ridgeway Ave.PO Box 5100Waterloo, IA 50704-5100Phone (800) 533-6446Fax (319) 292-5075

John Deere Power SystemsUsine de SaranB.P. 11013F-45401 Fleury les Aubrais CedexFrancePhone (33) 2 38 82 61 19Fax (33) 2 38 82 60 00

DSWDI155 Litho in U.S.A. (06 June 07)

DIMENSIONS

FEATURES AND BENEFITSHigh-Pressure Common Rail Fuel System• Higher injection pressures, up to 1600 (23,500 PSI), variable

injection pressure, variable timing control, multiple injections2-Valve Cylinder Head• Cross flow head design that provides excellent breathing from

a lower cost two-valve cylinder headFixed Geometry or Wastegated Turbocharger• Dependent on power rating, fixed geometry or wastegated

turbochargers precisely matched to the power level andapplication

Air-to-Air Intercooling• Most efficient method of cooling intake air to help reduce engine

emissions while maintaining low speed torque, transient responsetime, and peak torque. Enables an engine to meet emissions withbetter fuel economy and the lowest installed costs.

Compact Size• Mounting points for Tier 3/ Stage III A engines are the

same as Tier 2/Stage II enginesMultiple Injection Strategy• The new high-pressure common rail (HPCR) fuel system and

engine control unit (ECU) allow for multiple fuel injections.The number of fuel injections, based on speed and load, helpcontribute to lower combustion temperatures, which reducethe formation of NOx and particulates. The multiple injectionstrategy also provides an added benefit of noise reduction.

Engine Performance• New power bulge feature• Increased low speed torque• Multiple rated speeds to further reduce noise and improve

fuel economy• New higher peak torque ratings• Faster torque riseJohn Deere Electronic Engine Controls• Monitors critical engine functions providing warning and/or

shutdown to prevent costly engine repairs; eliminates needfor add-on governing components; all lowering total installedcosts. Snapshot diagnostic data that can be retrieved usingcommonly available diagnostic service tools

• New common wiring interface connector for vehiclesor available OEM instrumentation packages; new solidconduit and �T� connectors to reduce wiring stress, greaterdurability and improved appearance

• Factory installed engine mounted ECU, wiring harness andassociated components; industry standard SAE J1939interface which communicates with other vehicle systems,eliminating redundant sensors and reducing vehicle totalinstalled cost

Additional Features• Self-adjusting poly-vee fan drive• Forged-steel connecting rods• Replaceable wet-type cylinder liners• Either-side service• 500-hour oil change• Standard gear auxiliary drive

GENERAL DATA

Model 6068HF285Number of Cylinders 6Displacement-- L (cu.in) 6.8 (415)Bore X Stroke--in. (mm) 4.20 x 5.00 (106 x 127)Compression Ratio 19.0:1Engine Type In-line, 4-Cycle

Aspiration Air-to-AirLength--in. (mm) 44.2 (1123)Width--in. (mm) 25.9 (657)Height--in. (mm) 40.8 (1036)Weight, dry--lb (kg) 1340 (608)

Specifications and design subject to change without notice