Proper ball inflation of the balls is key to successful operation of the game, over inflation of the balls will increase the number bounce outs and lost balls. To assist with this each game ships with a ball inflation guide. To use the guide over inflate the ball so it cannot pass through the hole on the guide:
Remove the inflation needle from the pump and insert it into the ball to deflate the ball to allow it to pass through the inflation guide easily.
If you have lost or misplaced your inflation guide the part number for it is DR3027