Teac A2020 reel to reel 60,s

Question

thank you for you,t time. I have a older teac A2020 reel to reel, was playing it when it stoped,i opened the cover and it look,s like one of my idler,s disintecrated, causeing A mess, sticky tar on my fingers. could you please help me? id like to keep this old teac. my address is [e-mail] thank,s again! scott. albany oregon.