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Service bulletin PB1779

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11023934
Published by NHTSA2025-10-06
Manufacturer's numberPB1779
Manufacturer's date2025-09-22
NHTSA componentUNKNOWN OR OTHER

NHTSA's summary

Four parts are involved because they correspond to blue and red caps, which will no longer be available due to the supplier discontinuing their production. We will be transitioning to black caps over time and will retain the same part number, resulting in a mixed inventory. The new black caps are fully compatible with all existing products and will not impact on the performance or functionality of your equipment.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Vehicles listed
THERMO KING RLF1HPMV
THERMO KING RLF2
THERMO KING RLF2E
THERMO KING TE14-M17
THERMO KING TE14-M20
THERMO KING TE14-M23

Listing a model year does not mean every vehicle of it is concerned: the document says which.