Oregon® Belt Troubleshooting Guide

Belts
B
TROUBLE SHOOTING PROBLEMS WITH V-BELTS
1
Cracking
A
Wear on
Sidewalls
B
Edge Cord
Failure
C
Wear on
Top Corner
Wear on
Top Surface
F
Surface Hard
or Stiff
G
Vibration
H
High Belt
Temperature
PROBABLE CAUSE
A
B
C
D
E
F
G
H
I
J
OEP
242
D
I
Surface Flaking
Sticky or Swollen
E
Wear on
Bottom Surface
J
CORRECTIVE ACTION
CRACKING
Sheaves too small for belt section.
Belt slip.
Backside idler diameter too small.
Improper belt storage.
Excessive hot or cold temperature.
Use larger diameter sheaves.
Retension to manufacturer’s recommendations.
Increase backside idler to acceptable diameter.
Don’t coil belt too tightly, kink or bend. Avoid heat and direct sunlight.
Control drive environment.
WEAR ON SIDEWALLS
Belt slip.
Sheave misalignment.
Worn sheaves.
Incorrect belt.
Retension to manufacturer’s recommendations.
Realign drive.
Replace sheaves.
Replace with correct belt size.
EDGE CORE FAILURE
Sheave misalignment.
Damaged tensile member.
Worn or incorrect sheaves.
Check alignment and correct.
Follow correct installation procedure.
Replace sheaves for correct belt/sheave match.
WEAR ON TOP CORNER
Belt-to-sheave fit incorrect.
Belt rubbing against guard or drive structure.
Use correct belt/sheave match.
Remove obstruction.
SURFACE FLAKING STICKY OR SWOLLEN
Oil or chemical contamination.
DO NOT use belt dressing; eliminate sources of oil, grease, or chemical
contamination.
WEAR ON TOP SURFACE
Belt rubbing against guard.
Damaged idler.
Repair or replace guard.
Repair or replace idler.
SURFACE HARD OR STIFF
Hot drive environment.
Belt slip.
Improve ventilation to drive.
Retension to manufacturer’s recommendations.
UNUSUAL VIBRATION
Incorrect belt.
Poor equipment structural design.
Excessive sheave eccentricity.
Loose drive components.
Use correct belt/sheave match.
Check structure for adequate strength and rigidity.
Replace defective sheave.
Check machine components, guards, motor mounts, motor pads, bushings, brackets
and framework for adequate strength, stability and installation.
HIGH BELT TEMPERATURE
Hot drive environment.
Slipping.
Improve ventilation to drive.
Retension until slipping stops.
WEAR ON BOTTOM SURFACE
Belt bottoming against sheave groove bottom.
Worn sheaves.
Debris in sheaves.
Belts
Use correct belt/sheave match.
Replace sheaves.
Clean sheaves.
TROUBLE SHOOTING PROBLEMS WITH V-BELTS
F
G
H
I
J
B
Belts
Undercord
Cracking
K
Turns Over or
Comes of Drive
Top of Tie
Band Damaged
P
Tie Band
Separation
PROBABLE CAUSE
K
L
M
N
O
P
Q
R
L
Q
Undercord Sidewall
Burn or Hardening
Broken Belt
M
Wear on
Bottom Corner
N
Unusual
Noise
O
R
CORRECTIVE ACTION
UNDERCORD CRACKING
Sheaves too small for belt section.
Belt slip.
Backside idler diameter too small.
Excessive hot or cold temperature.
Improper belt storage.
Use larger diameter sheaves.
Retension to manufacturer’s recommendations.
Increase backside idler to acceptable diameter.
Control drive environment.
Don’t coil belt too tightly, kink or bend. Avoid heat and direct sunlight.
TURNS OVER OR COMES OFF DRIVE
Shock loading or vibration.
Foreign material in grooves.
Sheave misalignment.
Worn sheave grooves.
Subminimal diameter sheave.
Check drive design.
Shield grooves and drive.
Realign drive.
Replace sheaves.
Replace sheave with correct diameter.
SIDEWALL BURN OR HARDENING
Belt slip.
Worn sheaves.
Under-designed drive.
Shaft movement.
Retension to manufacturer’s recommendations.
Replace sheaves.
Redesign to manufacturer’s recommendations.
Check for center distance changes.
WEAR ON BOTTOM CORNER
Belt-to-sheave fit incorrect.
Worn sheaves.
Use correct belt/sheave match.
Replace sheaves.
UNUSUAL NOISE
Incorrect belt for sheaves.
Incorrect tension.
Worn sheaves.
Debris in sheaves.
Sheave misalignment.
Use correct belt size and type.
Check belt tension and adjust.
Replace sheaves.
Clean sheaves; improve shielding; remove rust, paint; or remove dirt from grooves.
Realign drive.
TOP OF TIE BAND DAMAGE
Interference with guard.
Backside idler malfunction.
Debris in sheaves.
Check and adjust guard.
Replace or repair backside idler.
Clean sheaves.
TIE BAND SEPARATION
Improper groove spacing.
Worn or incorrect sheaves.
Sheave misalignment.
Use sheaves manufactured to industry specifications.
Replace sheaves.
Realign drive.
BROKEN BELT
Under-designed drive.
Belt rolled or pried onto sheave.
Object falling into drive.
Severe shock load.
Redesign to manufacturers recommendations.
Use drive center distance adjustment when installing.
Provide adequate guard or drive protection.
Redesign to accommodate shock load.
OEP
Belts
243