{"nhtsa_id":10177601,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-07-29","date":"2020-06-12","document_id":"SIL 749","mfr_campaign":null,"replaces":null,"component":"EQUIPMENT:MECHANICAL; SERVICE BRAKES; SUSPENSION:FRONT:SPRINGS:TORSION BAR","mfr_system":null,"summary":"Altec has discovered that torsion bar mounting brackets and rear shear plates used to mount the torsion bar assembly can cause interference issues as the torsion bar rotates during road travel. Altec requires the torsion bar assembly to be inspected and repaired as described in the Inspection and Repair Procedure beginning on page 2 of this SIL. Use the Decision Chart on page 4 to assist in determining the required actions and whether Altec must perform certain repairs. If the inspection indicates damage to certain torsion bar components, one of the kits shown below must be installed as specified. • Torsion Bar Repair Kit, part number 990858321 • Torsion Bar Replacement Kit, part number 991080382 (requires Altec to install)","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10177601-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10177601-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10177601","components":[{"id":"brakes","name":"Brakes","parent":null},{"id":"equipment","name":"Equipment and accessories","parent":null},{"id":"suspension","name":"Suspension","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"ALTEC","model":"AERIAL DEVICE","year_from":2017,"year_to":2018,"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":[]}