Parts are scarce for the old style round Tekota reels. You may not be able to find parts for any repairs. Worst case scenario, you break a clutch lever arm. Shimano no longer has any. Only one aftermarket supply I found with any at all has a $100 price tag!
Go to fishshopshimano.com
Open menu
clicks PARTS
select Tekota
Find the 300lc or 500lc or 600lc All left and right-side plates are interchangeable, Exactly the same except the center body/frame, spool, worm gear and cross bars are different lengths.
You will see Shimano has discontinued a large number of parts for these reels. Take the 500lc. NO Worm gear. Sorry out of luck.