{"nhtsa_id":10041350,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2011-09-27","date":"2011-08-29","document_id":"TIB-E037","mfr_campaign":null,"replaces":null,"component":"STEERING:HYDRAULIC POWER ASSIST:PUMP","mfr_system":null,"summary":"KENWORTH: POWER STEERING PUMP SPOOL VALVE DOES NOT MEET QUALITY STANDARDS. THERE MAY BE A LACK OF STEERING ASSIST OR HARD STEERING AT IDLE. *RM","document":null,"url":"https://open.wenmarpro.com/bulletins/10041350","components":[{"id":"steering","name":"Steering","parent":null},{"id":"power-steering","name":"Power steering","parent":"steering"}],"codes":[],"topics":[],"vehicles":[{"make":"KENWORTH","model":"T660","year_from":2008,"year_to":2011,"match":null,"vehicle_ids":[]},{"make":"KENWORTH","model":"T700","year_from":2008,"year_to":2011,"match":null,"vehicle_ids":[]},{"make":"KENWORTH","model":"T800","year_from":2008,"year_to":2011,"match":null,"vehicle_ids":[]},{"make":"KENWORTH","model":"W900","year_from":2008,"year_to":2011,"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":[]}