Panasonic EY7881 Service Manual page 8

4.4. Check the following when replacing the O-ring.
• The O-ring should extend slightly from the edge face of the hammer/striker.
• Make sure that the O-ring is not worn.
• Make sure that the installed O-ring is not twisted.
8. Remove the pins by using a magnet, and dismount the spindle,
striker, striker stopper and O-ring.
8