V-Belt and Timing Belt Installation and Maintenance Bando USA, Inc. 1149 W. Bryn Mawr Itasca, Illinois 60143 (630) 773-6600 (630) 773-6912 FAX www.bandousa.
Troubleshooting Examples V-Belt Installation Here are some examples of belt failures described on pages 6 and 7. If you’ve encountered similar problems, check below for probable causes and solutions. V-Belts Problem Probable Cause Broken belt Foreign object in drive Sheave installation and removal To install QD® sheaves: Caution: Before doing any inspection or maintenance on belt drives, turn the equipment off and lock out the power source.
Check and correct sheave alignment • Use matched sets Misaligned sheaves will accelerate wear of belt sidewalls, which will shorten both belt and sheave life. Misalignment can also cause belts to roll over in the sheave, or throw all the load to one side of the belt – breaking or stretching the tensile cord. A matched set of belts is necessary to assure equal distribution of the load. With some manufacturers, length codes are necessary to match belts within a given size.
Troubleshooting Guide Force/deflection method 1. Measure the span length “L” of your drive (see Figure 1). Problem Cause Solution Problem Extreme cover wear, worn corners V Belts Short Belt Life Rapid failure with no visible reason Soft, slick, swollen sidewalls.
Torque Values for Tightening TL® Bushings Tensioning Timing belts should fit the pulleys snugly — neither too tight nor too loose. The “tooth grip” principle eliminates the need for high initial tension. A snug belt-pulley fit extends belt and bearing life, and gives quieter operation. TL® Bushing Wrench Torque (In. Lbs.) TL1008 . . . . . . . . . . . . . . . . .55 TL1210 . . . . . . . . . . . . . . . .175 TL1215 . . . . . . . . . . . . . . . .175 TL1610 . . . . . . . . . . . . . . . .175 TL1615 . . . . .
Torque Values for Tightening TL® Bushings Tensioning Timing belts should fit the pulleys snugly — neither too tight nor too loose. The “tooth grip” principle eliminates the need for high initial tension. A snug belt-pulley fit extends belt and bearing life, and gives quieter operation. TL® Bushing Wrench Torque (In. Lbs.) TL1008 . . . . . . . . . . . . . . . . .55 TL1210 . . . . . . . . . . . . . . . .175 TL1215 . . . . . . . . . . . . . . . .175 TL1610 . . . . . . . . . . . . . . . .175 TL1615 . . . . .
Troubleshooting Guide Force/deflection method 1. Measure the span length “L” of your drive (see Figure 1). Problem Cause Solution Problem Extreme cover wear, worn corners V Belts Short Belt Life Rapid failure with no visible reason Soft, slick, swollen sidewalls.
Check and correct sheave alignment • Use matched sets Misaligned sheaves will accelerate wear of belt sidewalls, which will shorten both belt and sheave life. Misalignment can also cause belts to roll over in the sheave, or throw all the load to one side of the belt – breaking or stretching the tensile cord. A matched set of belts is necessary to assure equal distribution of the load. With some manufacturers, length codes are necessary to match belts within a given size.
Troubleshooting Examples V-Belt Installation Here are some examples of belt failures described on pages 6 and 7. If you’ve encountered similar problems, check below for probable causes and solutions. V-Belts Problem Probable Cause Broken belt Foreign object in drive Sheave installation and removal To install QD® sheaves: Caution: Before doing any inspection or maintenance on belt drives, turn the equipment off and lock out the power source.
