| American Isuzu Motors Inc | USA |  | | |
| Arrow Engine Co | USA |  | manufacturer | |
| Caterpillar Asia Pte Limited | SINGAPORE |  | manufacturer | |
| Caterpillar Inc., Industrial Power Syste | USA |  | manufacturer | |
| Caterpillar Power Systems | USA |  | manufacturer | |
| Cummins Deutschland GmbH | GERMANY |  | manufacturer | |
| Cummins Diesel | UK |  | manufacturer | |
| Cummins Engine Co Ltd | UK |  | manufacturer | |
| Cummins Inc | USA |  | manufacturer | |
| Deere Power Systems | USA |  | manufacturer | |
| Deutz AG | GERMANY |  | | |
| John Deere Power Systems | USA |  | manufacturer | |
| Kubota Corporation | JAPAN |  | manufacturer | |
| Lister-Petter Inc | USA |  | manufacturer | |
| Lombardini Motoren GmbH | GERMANY |  | manufacturer | |
| Lombardini USA Inc | USA |  | manufacturer | |
| Perkins Engines Company Limited | UK |  | manufacturer | |
| Perkins Engines Inc | USA |  | manufacturer | |
| Posi Tech International | USA |  | | |
| Scania Industrial And Marine Engines | SWEDEN |  | | |
| Volkswagen Of America Inc -- Industrial | USA |  | manufacturer | |
| Yanmar Diesel America Corp | USA |  | manufacturer | |
| Yanmar Diesel Engine Co Ltd | JAPAN |  | manufacturer | |
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