Panasonic SA-AK310GC Service Manual page 35

NOTE:
Take care not to lose the disc lever spring.
Step 4 Release the 2 claws, and then draw the relay gear B.
Step 5 Release the 2 claws as shown below.
NOTE:
Hold the loading stopper ass'y manually bacause it is flipped by spring.
Step 6 Remove the cushion spring.
Step 7 Remove the loading stopper ass'y in the direction of arrow.
Step 8 Release the 2 claws, and then remove the relay gear A.