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.