| Bulletin Number | Vehicle Make | Vehicle Model | Model Year | Summary |
|---|---|---|---|---|
| TB EN-57 | UD | UD1800 | 9999 | PASSING OIL COMPLAINTS IN GH7 TURBOCHARGERS. PURPOSE: TO ADVISE TECHNICIANS TO INSPECT THE TURBO AIR INLET AND AIR OUTLET FOR PASSING OIL COMPLAINTS. |
| TB EN-55 REV | UD | UD1800 | 9999 | ADDITIONAL CAUSES FOR HIGH SOOT AND REGENERATION FREQUENCY<br /> |
| PIL023R | UD | UD1800 | 1993 | OIL COOLER CORE CHANGE FOR ALLISON AUTOMATIC TRANSMISSIONS. *TW<br /> |
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