Spicer Drive Axles Failure Analysis Service Manual - Manual (Page 23)

Ring Gear and Pinion
22
R
ing G
ear and P
ini
on
Pitting and Spalling Failures
Ring Gear - Pitting Drive Pinion - Pitting
Drive Pinion - Case Crush Drive Pinion - Spalling
General Description: Progressive destruction of gear teeth. An overload puts pressure between the meshed surfaces. Re-
peated overloads result in teeth failure.
Usual Causes: • Continuous overloading
• Contaminated lube
• Incorrect lube
Failure Prevention: • Correct Specifications - see Failure Prevention Section
• Torque is Important - see Failure Prevention Section
• Vehicle Load Ratings - see Failure Prevention Section
• Maintenance, Rebuilding, and Adjustment - see Failure Prevention Section
Pitting
Advanced spalling