Challenge Titan 200 blade stuck

[jrsc]

Hi, I just bought a used challenge titan 200. It was working good when I bought it but now after having it shipped and getting it hooked up at my location the blade gets stuck on its way down. It comes down about and inch and then seems like it hits something and won't come down any further. There was no damage to the machine from shipping but is there something that could have gotten knocked out of whack from shipping that would cause this?

EDIT: Found the problem. The pin that holds the knife to the hydraulics came loose.