Belts – Troubleshooting
F
G
H
I
J
Wear on Top Surface
Wear on Bottom Surface
High Belt Temperature
Surface Hard or Stiff
Vibration
K
L
M
N
O
Undercord Sidewall Burn or Hardening
Undercord Cracking
Turns Over or Comes of Drive
Wear on Bottom Corner
Unusual Noise
P
Q
R
Tie Band Separation
Top of Tie Band Damaged
Broken Belt
Probable Cause
Corrective Action
K
Undercord Cracking Sheaves too small for belt section
Use larger diameter sheaves
Belt slip
Retension to manufacturer’s recommendations Increase backside idler to acceptable diameter
Backside idler diameter too small Excessive hot or cold temperature
Control drive environment
Improper belt storage
Don’t coil belt too tightly, kink, or bend. Avoid heat & direct sunlight
L
Turns Over or Comes Off Drive Shock loading or vibration Foreign material in grooves
Check drive design; ensure parts are to OEM specifications
Shield grooves & drive
Sheave misalignment Worn sheave grooves
Realign drive
Replace sheaves
Subminimal diameter sheave
Replace sheave with correct OEM part
M
Sidewall Burn or Hardening Belt slip
Retension to manufacturer’s recommendations
Worn sheaves
Replace sheaves
Under-designed drive
Redesign to manufacturer’s recommendations
Shaft movement
Repair/replace bearings or spindle assembly as necessary
N
Wear on Bottom Corner Belt-to-sheave fit incorrect
Use correct belt/sheave match
Worn sheaves
Replace sheaves
O
Unusual Noise Incorrect belt for sheaves
Use correct belt size and type; verify manufacturer’s part number and size
Incorrect tension
Check belt tension & adjust
Worn sheaves
Replace sheaves
B
Debris in sheaves
Clean sheaves; improve shielding; remove rust, paint; or remove dirt from grooves
Sheave misalignment
Realign drive
P
Top of Tie Band Damage Interference with guard Backside idler malfunction
Check & adjust guard
Replace or repair backside idler
Debris in sheaves
Clean sheaves
Q
Tie Band Separation Improper groove spacing Worn or incorrect sheaves
Use sheaves manufactured to industry specifications
Replace sheaves
Sheave misalignment
Realign drive
R
Broken Belt Under-designed drive
Redesign to manufacturers recommendations Use drive center distance adjustment when installing
Belt rolled or pried onto sheave
Object falling into drive
Provide adequate guard or drive protection Redesign to accommodate shock load
Severe shock load
LG 343
Belts – Troubleshooting
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