Full definition
The procedure of removing worn belts and installing new ones in a power transmission drive. Critical rule: always replace ALL belts in a multi-belt drive as a matched set — never mix new and used belts, as length differences cause unequal load sharing and rapid failure of the shorter belts. Procedure: (1) lock out energy (LOTO); (2) release tension; (3) remove old belts (never pry over pulleys); (4) inspect pulley grooves with a gauge and replace worn pulleys; (5) install new matched-length set; (6) set initial tension to manufacturer specification; (7) verify alignment; (8) run in for 24-48 hours; (9) retension (new belts stretch 1-3% during run-in). Document belt brand, profile, length, and date for maintenance records. Per Gates and Optibelt installation guides.