PDFWAC 296-806-30010
Make sure belt tighteners meet these requirements.
(1) You must make sure belt tighteners:
(a) Are substantially constructed and securely fastened.
(b) Have bearings that are securely capped.
(c) Have a mechanism to prevent them from falling.
(2) You must make sure belt tighteners used to activate machinery are securely held in the "off" position by either:
(a) Gravity; or
(b) An automatic mechanism that must be released by hand.