I agree, But one this is under forum add a category to Threads, this would be good to Search by Categories.
The only thing is that new PW members can get education easily and re-post for same issues will not come and all would advance forward in technical knowledge.
Believe me, Preventive Maintenance heals and mainly effects performance and breakdowns. I saw this on Construction project ISB-PWR Motorway project, Heavy and Light machinery both.