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Troubleshooting
V-Belts Systems
50
Problem
(continued)
Broken Belts
Side Split
Ply
Separation
Uneven
Envelope
Wear
Envelope
Wear
Spin Burn
Gouges
Weathering
or “Craze”
Cracks
Loose Cover
and Swell
Possible Causes
Excessive Oil
Exposure to Elements
Pried Over Sheaves
Contact with Obstruction
Insufficient Tension
Stalled Drive Sheaves
Constant Slippage
Rough Sheaves
Substandard Sheaves
Excessive Tension
Shock Load
Foreign Material
Excessive Dust
Drive Misalignment
Worn Sheaves
Excessive Vibration
High Ambient Temperature
Drive Underbelted
Damaged Tensile Member
Incorrect Belts
Incorrect Drive Set-Up
Insufficient Take-Up
Improper Matching
Mixed Old and New Belts
Non-Parallel Shafts
Different Manufacturers
Belt/Pulley, Incompatible
Corrective Action
Lubricate properly
Clean sheaves and belt
Replace belts
Provide protection
Install properly
Check for belt length
Remove obstruction
Tension properly
Free sheaves
Replace sheaves
File smooth
Redesign drive
Operate properly
Align drive
Provide ventilation
Check for proper belt
Check machinery
Use only new belts
Use single source
Check fit
Replace pulleys