Just purchased mower (ZT2352T) at auction, appears to be a 2004(?) Starts and runs smooth, but cannot raise and lower the deck with the foot pedal. Pedal is very hard to push, cannot even get it in the transport position. I removed the mowing height pin, and it just sits there. I can force it up and down by prying and stepping on the deck. I did grease it, had to replace a couple of zerks. Don't know if it ever had been greased. Mower has 170 hours on it, and looks great. Looking forward to using it, if I can get the deck to cooperate. Any suggestions?