(1) You must use an idler when your machine uses a quarter-twist belt that can run in either direction.

(2) You must make sure, when it is necessary to apply dressing to moving belts or ropes, that you apply the dressing at a point where the belts or ropes leave the pulley.

(3) You must make sure that a belt shifted by hand is not fastened with metal or other material that creates a hazard.

(4) You must make sure a bearing support that is next to a friction clutch or cutoff coupling has self-lubricating bearings that do not need frequent attention.

(5) You must use a substantial belt perch, such as a bracket or roller, when it is not practical to use a loose pulley or idler to keep idle belts away from shafts.