Investigation PE88018: Western Star Western Star

Status

CLOSED

Opened

Jan 14, 1988

Closed

Jan 28, 1988

Model years

—

Subject

Insufficient weld penetrat

Component: Suspension

Summary

Summary of information from manufacturer:on december 7, 1987, chalmerssubmitted a defect report (87e-038) pertaining to insufficient weldpenetration of the upper torque rod on their 800 series rear suspension.failure of a weld could have resulted in the rear axle(s) moving out ofposition, resulting in loss of directional control.seven oem's werenotified of the potential defect.analysis:one of the oem's referred to above contacted the office ofdefects investigation and reported that additional problems have beendiscovered on the above mentioned suspension.allegedly the weldsfastening joint ends to the above mentioned replacement torque rods alsohave poor penetration.separation of a joint end could allow movement ofthe rear axle out of position, possibly resulting in loss of control of thevehicle.proposed action:open a pe.contact the equipment manufacturer and obtaininformation on the new allegation.===

An NHTSA investigation looks into whether a safety defect exists. Opening one is not a finding. Outcomes can include a recall, closure without action, or further inquiry.