| Business | Phone |
| Richard Klein Diesel Engine 8940 Ne Vancouver Way, Portland 97211 | (503) 289-1032 |
| Cummins Northwest 4711 N Basin Ave, Portland 97217 | (503) 289-0900 |
| Quality Mechanics 2569 Ne Columbia Blvd, Portland 97211 | (503) 249-0544 |
| Diesel Cast West Inc 8100 Ne 14th Pl, Portland 97211 | (503) 282-3909 |
| Halton Co 4421 Ne Columbia Blvd, Portland 97218 | (503) 288-6411 |
| Hamilton Engine Sales Inc 5540 Ne Columbia Blvd, Portland 97218 | (503) 288-6714 |