It is a standard right hand thread - be aware the lower pulley is threaded and needs to be held securely to loosen the 30mm bolt. it should be torqued to at least 90 Nm when reassembling.
From personal experience - I have found some EXTREMELY tight - 4 foot pile extension on breaker bar tight!
Good luck
Ps- Take note of how it all comes apart - pulleys, and spring washer should be assembled correctly for alignment.