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Service bulletin SIL 677

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 id10142614
Published by NHTSA2018-07-16
Manufacturer's numberSIL 677
Manufacturer's date2018-05-14
NHTSA componentEQUIPMENT; ELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL

NHTSA's summary

This service information letter (SIL) notified customers to inspect the electrical slip ring for proper installation. Slip rings found to be improperly installed are to be replaced.

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

Electrical system, Equipment and accessories

Vehicles listed
ALTEC DIGGER DERRICK1992 to 2017

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