The National Highway Traffic Safety Administration has launched an investigation looking into certain Marmon-Herrington axles, according to NHTSA documents. The investigation was prompted by a recall that was issued last September.
NHTSA is looking further into a defect with Marmon-Herrington MT14, MT17, MT22, R17 and R22 drive axles installed as original equipment in certain heavy-duty trucks. If the hex nuts are not tightened to specification, the driveshaft may disconnect from the drive axle, resulting in a loss of propulsion and increasing the risk of a crash.
Last September, Marmon-Herrington recalled more than 500 of the axles for loose hex nuts. In January, approximately 40 Freightliner 108SD, 114SD, M2 trucks and Western Star 4900 trucks were recalled for the same defect.
NHTSA’s latest investigation into the matter seeks to obtain a complete purchaser list from Marmon-Herrington. Companies who purchased the axles will be notified of the defect. Safety recalls will be conducted where appropriate.
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