WenmarOpen by Wenmar Pro

Service bulletin TSB190133-072420

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 id10163648
Published by NHTSA2019-08-12
Manufacturer's numberTSB190133-072420
Manufacturer's date2019-07-24
NHTSA componentENGINE AND ENGINE COOLING

NHTSA's summary

This Technical Service Bulletin describes the verification and resolution of lubricating oil seepage from the crankcase breather tube at rocker lever cover attachment point caused by excess material on rocker lever cover interferring with the crankcase breather tube sealing ability.

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.

Components

Engine

Vehicles listed
CUMMINS X12

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