Spicer Failure Analysis Guide - Manual (Page 2)

tubing
Broken weld
• Shock loads
• Improper welding procedures
• Excessive vibration
Universal Joints Universal Joints
Spalling
• Water contamination
• Improper lube type
• Lubrication failure
How to IdentIFy FAIlURe And
PRoBABle CAUSe
yokes
Broken tang Half Round
• Improper bearing retainer bolt torque
• Improper installation
• Strap was re-used instead of replaced
twisted tubing
• Excessive torque
• Driving into immovable object under power
• Spinning tires that suddenly grab hold
Fractured yoke
• Excessive torque loads
• Shock loads
• Improper application
• U-joint kit failure
tubing yokes
Fractured Spline
• Excessive torque loads
• Shock loads
• Improper application
tube Shafts Universal Joints
Brinelling
• Excessive continuous torque loads
• Seized slip yoke splines
• Excessive driveline angles
• Sprung or bent yoke
• Over tightened “U” Bolts
end Galling
• Excessive u-joint operating angles
• Improper assembly procedures
• Sprung or bent yoke
• Lack of lubrication (improper maintenance)