Page 215 - Rollingbearings

Inspection and monitoring
Troubleshooting
• General recommendations
– Take photographs throughout the
inspection process to help document the Bearings that are not operating properly
condition of the bearing, lubricant and usually exhibit identiiable symptoms The
machine in general best way to identify these symptoms, and
– Check the condition of the grease at take corrective action at an early stage, is to
different places and compare with fresh establish a plant-wide condition monitoring
grease (ig. 59) Keep a representative programme
sample of the grease for further In cases where condition monitoring
analysis equipment is not available or practical, the
– Certain large and medium-size bearings section Troubleshooting of the SKF bearing
are suitable for reconditioning For add- maintenance handbook presents some use-
itional information, refer to the SKF ful hints to help identify the most common
bearing maintenance handbook and symptoms, their causes and, whenever pos-
publication SKF Remanufacturing sible, some practical solutions Depending
Services on the degree of bearing damage, some
symptoms may be misleading and, in many
Inspecting seal counterfaces cases, are the result of secondary damage
To effectively troubleshoot bearing prob-
To be effective, a seal lip must run on a lems, it is necessary to analyse the symp-
smooth counterface If the counterface is toms according to those irst observed in the
worn or damaged, the seal lip will cease to application This is dealt with in more detail
function properly in the publication Bearing damage and fail-
When inspecting the seal counterface, ure analysis
also check for corrosion, shaft wear,
scratches, dents, lip wear, lip tears and so on
If corrosion is evident but not severe, use a
ine wet/dry abrasive paper to remove it, and
then make sure all remnants are also Sealing, mounting and dismounting
removed Worn counterface parts of the
shaft can be repaired using SKF
Speedi-Sleeve

 WARNING
Avoid inhaling, ingesting or contacting
solvents and alkaline solutions These
can cause skin and eye burns or dam- B.8
age to respiratory or digestive tract If
necessary, seek medical assistance

Fig. 59
Condition of the grease

Fresh grease: Used grease:
brown colour colour turned
greyish

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