Today I replaced the tuning clutch disc and U-joint disc. Both are made out of rubber that has dried up and started cracking. These will just need to be replaced later so it is best to replace them now.
Removing tuner section. Front of radio just unbolts from the chassis and the eight connecting wires were unsoldered.
Tuner section removed
Old tuning clutch. This clutch is used to disengage the tuning knob when station selector buttons are pushed. Rubber clutch is all dried out and cracked.
Tuning components removed
Old U-joint made from cloth reinforced rubber cracked in several places
Note clutch rubber falling out of assembly
Outer clutch disc crimped is crimped onto the shaft
Filing off the crimp to get the clutch disc off
I drilled and tapped the shaft end for a 4-40 SS screw
Test fitting the clutch disc mounted with screw
Spraying neoprene rubber clutch disc pads and clutch discs with contact cement
Applied the rubber pads to the clutch discs and pressing until dry
Old U-joint with rivets drilled off
New neoprene U-joint disc
New U-joint assembled
Tuning components installed and tuner section installed in radio