John Deere 6068H
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| John Deere Power Systems 6068H | |
| Manufacturer: | John Deere Power Systems |
| Introduced: | Late-1997 |
| Discontinued: | Mid-2003 |
The John Deere Power Systems 6068H was a compressed natural gas (CNG) engine developed and manufactured by John Deere Power Systems for on-highway applications. Major applications included Blue Bird & Thomas Built Buses school buses, as well as ElDorado National transit buses.
The engine was a scaled down variant of John Deere's larger 6081H engine, but was discontinued in 2003 due to poor sales, as the 6081H-250 engine was favored to the smaller 6068H-225 engine.
Construction
The 6068H features much the same construction as the larger 6081H, with a cast iron alloy, non-siamese bore engine block, cast iron slab-style 2-valve cylinder heads, centrifugal-cast wet liner cylinder liners, chill hardened cast iron crankshaft & camshaft, forged steel alloy I-beam taper top connecting rods, and electronic throttle control.
Specifications
6068H-225
| Engine displacement |
Years | Cylinders | Cylinder bore | Piston stroke | Compression ratio | Idle speed | Power Output | Torque Output |
|---|---|---|---|---|---|---|---|---|
| 6.8L (415 cu. in.) | 1997-2003 | 6 | 4.19" (106.5mm) | 5.00" (127mm) | 11:1 | 650rpm | 225hp @ 2400rpm | 650lb-ft @ 1500rpm |
Specifications listed above were current as of June 2001.
References
- USDOE, Office of Transportation Technology; Heavy Vehicle and Engine Resource Guide, December 2001
- 6068H Natural Gas Engine Quick Specifications, June 2001
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