Manual 2017 Rev C p/n 2017
21
05
Installation
V-Belt Troubleshooting
PROBLEM POSSIBLE CAUSES SOLUTION
Belts slip (sidewalls
glazed)
Not enough tension Replace belts; apply proper tension.
Drive squeals
Shock load Apply proper tension.
Not enough arc of contact Increase center distance.
Heavy starting load Increase belt tension.
Belt(s) turned over
Broken cord caused by prying on sheave
Replace set of belts and install
correctly.
Overloaded drive Redesign drive.
Impulse loads Apply proper tension.
Misalignment of sheave and shaft Re-align drive.
Worn sheave grooves Replace sheaves.
Excessive belt vibration
Check drive design.
Check equipment for solid mounting.
Consider use of banded belts.
Mismatched belts New belts installed with old belts Replace belts in matched sets only.
Breakage of belt(s)
Shock loads Apply proper tension; recheck drive.
Heavy starting loads
Apply proper tension; recheck drive.
Use compensator starting.
Belt pried over sheaves Replace set of belts correctly.
Foreign objects in drives Provide drive guard.
Rapid belt wear
Sheave grooves worn Replace sheaves.
Sheave diameter too small Redesign drive.
Mismatched belts Replace with matched belts.
Drive overloaded Redesign drive.
Belt slips Increase tension.
Sheaves misaligned Align sheaves.
Oil or heat condition Eliminate oil. Ventilate drive.
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