I was pushing up topsoil in my backyard today with a ASC RC-60.. had a medium size load on the ground - went to lift & dump the load forward when I heard something POP. Looked down to see the left hydraulic cylinder laying on the loader arm, so I turned the machine off and stopped work. Looks like the bold holding the pin in place worked its way loose allowing the pin to back out just enough to pop out of place. I need to start going over these rentals with a fine tooth comb before using them. Can't trust the mechanics have the time to do anything more than pump grease in a few fittings & gas up. Had a lot more work to do this weekend- looks like none of it will get done now.