Spicer Drive Axles Failure Analysis Service Manual - Manual (Page 38)

Seals and Yokes
37
Yoke Wear and Seal Lip Wear
Yoke to Seal Interface - Normal Wear Yoke to Seal Interface - Extreme Wear
r a e W e m e r t x E - p i L l a e S r a e W l a m r o N - p i L l a e S
General Description
and Unusual Causes: • Normal Wear: Flattened Edge - Notice the flattened edge of the seal lip indicating incorrect positioning
of seal lip against the yoke. Incorrect placement of seal lip will result in lube leakage from the seal or,
as shown above, permit dust or dirt to contaminate the lube itself. In order to retain lube and exclude
dust and dirt from the system, the seal must be clean, void of defects, and properly installed.
• Extreme Wear: Gap on Seal Lip - Contact area on seal lip is too wide (over 1/32"). This indicates ex-
cessive wear or loss of material consistency. The seal must be replaced.
• Scoring: If the yoke displays a rough or scored condition, replace the seal and/or yoke.
Failure Prevention: • Maintenance, Rebuilding, and Adjustment - see Failure Prevention Section
Narrow wear
band width
Wide wear
band width