{"nhtsa_id":634166,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2002-09-28","date":"2002-06-11","document_id":"SB221020","mfr_campaign":null,"replaces":"SB221020","component":"UNKNOWN OR OTHER","mfr_system":null,"summary":"THIS BULLETIN INVOLVES INSTALLATION OF ELECTRONIC UNIT PUMP PLUNGER SPRING AND SPRING SEAT, ALSO APPLIES TO MACK TRUCKS AUSTRALIA.*JB","document":null,"url":"https://open.wenmarpro.com/bulletins/634166","components":[],"codes":[],"topics":[],"vehicles":[{"make":"MACK","model":"E-TECH","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]}],"as_of":"2026-10-19","note":"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.","attribution":[]}