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Service bulletin FDM-SVC-001

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 id10199834
Published by NHTSA2021-08-04
Manufacturer's numberFDM-SVC-001
Manufacturer's date2021-07-12
NHTSA componentEQUIPMENT; ENGINE AND ENGINE COOLING

NHTSA's summary

This bulletin provides instructions to update the cab heater plumbing ball valve mount. The new ball valve mount design was developed after receiving reports the ball valve mounting screws were breaking off in the ball valve body. The new design uses a U-bolt to secure the ball valve to a new mounting plate.

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, Equipment and accessories

Vehicles listed
OSHKOSH S SERIES

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