| Model Code | Description | |
|---|---|---|
| 01 | 668.001, 668.002, 668.003, 668.041, 668.042, 668.061, 668.062, 668.063 | EXHAUST BRAKE WITH VACUUM CONTROLLED ENGINE SHUT-OFF |
| 02 | 668.001, 668.002, 668.003, 668.041, 668.042, 668.061, 668.062, 668.063, 669.000, 669.001, 669.002, 669.003, 669.041, 669.042, 669.061, 669.062, 669.063, 669.301, 669.302, 669.303, 669.361, 669.362, 669.363 | EXHAUST BRAKE WITH VACUUM CONTROLLED ENGINE SHUT-OFF |
| 03 | 668.041, 668.042, 669.041, 669.042 | DUMPER VERSION |