for Oconnor Heads
Installation: To mount the Cardellini Head-Lock on your OConnor head, remove the 3/8” bolt from the center of the Head-Lock with the hex wrench provided. Then separate the locking unit from the base plate, noting how the round bolt head on the base of the locking unit fits into the hole provided on the bottom of the base plate. Using the four 1/4” bolts and a 3/16” hex wrench, bolt the base plate to the bottom of the head. Then, being careful to line up the before-mentioned bolt head and hole, fit the locking unit to the base plate. Reinstall the 3/8” bolt and tighten it with the hex wrench.
Mounting head on Mitchell mount: Pass the center locking unit of the Head-Lock through the center hole of the Mitchell mount. Align the key with the keyway. Turn the knob clockwise until the three jaws contact the Mitchell mount. Make the knob good and snug so it doesn’t vibrate loose during use.
Safety Catch: For extra security, one of the three jaws on your Head-Lock has a ball plunger pressed into it, so the Head-Lock could never vibrate loose and the head fall off of its mount. When you are loosening the knob and retracting the jaws, you will feel resistance when the ball plunger reaches the center hub. Continuing to turn the knob will overcome this resistance, and the jaws will retract into the hub.
Lubrication: Under normal working conditions, lubrication of the Head-Lock should rarely be necessary. There are two groups of moving parts:
Disassembly: Separate the locking unit from the base plate by removing the 3/8” center bolt. To disassemble the locking unit you must first loosen the set screw that is set into the 1/4” hole in the side of the hub, between two of the jaws. Using a 7/64” hex wrench, back out the set screw until the head is flush with the surface of the hub. Now you can separate the knob and jaws from the hub. When removing the jaws make note of which jaw is in which groove of the hub. To reassemble: 1) replace the knob and jaws being sure to put the jaws back in the grooves they came from. 2) Align the bolt head on the base of the locking unit with the hole in the bottom of the base plate and reattach these parts using the 3/8” bolt. Tighten this bolt before tightening the set screw. 3) Tighten the set screw.
If you have any questions or feedback about the Head-Lock please phone me at (415) 924-0294. –Steve Cardellini