WenmarOpen by Wenmar Pro

Service bulletin SIL 622

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 id10198835
Published by NHTSA2021-07-06
Manufacturer's numberSIL 622
Manufacturer's date2015-11-17
NHTSA componentELECTRONIC STABILITY CONTROL:AUTOMATIC (ASC); EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT

NHTSA's summary

Altec has received some reports of upper boom drifting on some of the above listed units. Investigation found the cause to be contamination trapped in the bottom upper boom drive cylinder by-pass valve. Depending on the position of the booms, the upper boom on units with this condition can drift down.

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

Driver assistance, Equipment and accessories

Vehicles listed
ALTEC ALTEC

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