ASM Failure Analysis Case Histories: Automobiles and Trucks
Fatigue Fracture of an 8640 Steel Shaft From a Fuel-Injection-Pump Governor Because of Insufficient Fatigue Strength
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Published:2019
Abstract
An 8640 steel shaft installed in a fuel-injection-pump governor that controlled the speed of a diesel engine used in trucks and tractors broke after few days of operation. The mechanism that drove the shaft was designed to include a slip clutch to protect the governor shaft from shock loading. It was revealed by visual examination that the fracture had initiated in the sharp corner at the bottom of a longitudinal hole which was part of a force feed lubricating system. Beach marks were observed on the fracture surfaces. It was revealed by further examination that the slip clutch was...
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Member Sign InFatigue Fracture of an 8640 Steel Shaft From a Fuel-Injection-Pump Governor Because of Insufficient Fatigue Strength, ASM Failure Analysis Case Histories: Automobiles and Trucks, ASM International, 2019, https://doi.org/10.31399/asm.fach.auto.c0047846
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