EXPLANATION OF COMPONENTS OPERATION CAP, COVER WITH LOCK Use the starting switch key to open and close the caps and covers. For their locations , see "LOCKING (PAGE 3-94)". Insert the key as far as it will go to the shoulder. If the key is turned before it is inserted all the way, it may break. METHOD OF OPENING AND CLOSING CAP WITH LOCK TO OPEN THE CAP 1. Insert the key into the key slot. 2. Turn the key to the OPEN position, align the key slot with the match mark on the cap, then open the cap. TO LOCK THE CAP 1. Turn the cap into place and insert the key into the key slot. 2. Turn the key to the LOCK position and take the key out. 3-30