If the ring is resistant to closing, tap the ring around the circumference with the mallet to aid in moving the ring into proper place over the curl on the drum. Recommended torque for rings will vary depending on the metal gauge thickness of the ring and the type of lug or eyelet on the ring. A minimum of 40 ft. lbs. and a maximum of 60 ft. lbs. should normally be enough to close a 12 ga. ring. Under no circumstances is the ring to be closed to the point that the ends of the ring come into contact. Make sure cover gasket is in place and secure in the cover gasket channel.
Place cover squarely onto the top of the drum and make sure it is seated on the top of the drum.
Using a rubber or fiber mallet tap the ring around the circumference of the cover. The use of a head depressor is recommended. Using a socket and ratchet wrench or air impact wrench begin to torque the bolt through the threaded lugs. If the ring is resistant to closing, tap the ring around the circumference with the mallet to aid in moving the ring into proper place over the curl on the drum. Secure the jam nut against the unthreaded lug using a wrench.