|
Problem |
Cause |
Solution |
|
Belts Too Long at Installation |
Wrong size belts. |
See dealer for correct belt. |
|
Drive set up improperly. |
Recheck machine. |
|
|
Insufficient take-up. |
Correct. See dealer for correct belt. |
|
|
Belts Too Short at Installation |
Wrong size belts. |
See dealer for correct belt. |
|
Drive set up improperly. |
Recheck machine. |
|
|
Insufficient take-up. |
Correct. See dealer. |
|
|
Belts stored in damp area. |
Dry in even 250*F for two hours. |
|
|
Belts Mismatched at Installation |
Poorly matched at factory. |
Replace with a new set of belt. |
|
Old belts and new belts mixed on same drive. |
Never install new belts with old belts. |
|
|
Mixed set of belts from one than one manufacturer. |
Replace belts. Replace with a new set from one manufacturer. |
|
|
Pulley shaft not parallel, causing unequal stretch. |
Realign drive. |
|
|
Worn or improperly machined sheaves. |
Replace sheaves or recut to correct dimensions. |
|
|
Belts Mismatched after services |
Old belts & new belts mixed on same drive. |
Never install new belts with old belts. |
|
Mixed set of belts from one than one manufacturer. |
Replace
with new belts. |
|
|
Pulley shaft not parallel. |
Realign drive. |
|
|
Worn or improperly machined sheaves. |
Replace sheaves or recut to correct dimensions. |
|
|
Tensile member damaged during installation. |
Replace with new belts, properly installed. |
|
|
Loss in Driven Speed |
Pulley ratios not correct. |
Check ratio of sheaves diameter against ratio of RPM- change to correct pulleys. |
|
Excessive Slip. |
Check-shut down drive-test sheave temperature by feel. A badly slipping belt will heat sheave so that it nearly burns operator's bare hand. |
|
|
Loose belt. |
Check for proper tensions. |
|
|
Localised wear |
Incorrect Sheaves diameters. |
Check cross-section dimension. If narrow-pulley spin. If full-internal break down and resultant swell. |
|
Belt Envelope Hardening and Cracking |
Heat and chemical fumes. |
Check working conditions provide ventilation. |
|
Belt Squeal |
High starting load or excessive overload. |
Tighten belt. |
|
Belt Break Prematurely |
Shock or extreme overload. |
Operate machine properly. See dealer for proper belt. |
|
Belts damaged during installation. |
Follow recommended installation procedure. |
|
|
Foreign material falling into drive causing abnormal abrasion. |
Provide drive guard. |
|
|
Small pulleys causing separation. |
Check sheave dimensions. |
|
|
Excessive tension, causing separation. |
Check
Pulley diameters and ratios. |