It is a really nice piece so I want to be careful with it. * Once the neck is right, fret all stings at the first fret, with a capo, and see what the action is like. Either way, it is part of the neck. Archived. The truss rod is a metal rod that runs down the banjo neck, gives the neck stability, and helps you adjust the curvature of the banjo neck which in turn affects the action of your banjo. 3. Close. To lower your action you would want to tighten the truss rod, so I would suggest making a ⅛ of a turn clockwise and then checking the banjo action. If your adjustment doesn’t help the problem, then take it to a pro, but donÂ’t be afraid to do this yourself, because banjo necks need to be adjusted this way fairly frequently, perhaps once or twice a year. help with neck adjustment. Luckily, most banjos have headstock adjustment. The actual adjustment mechanism is normally either a acorn nut or a hex key socket. This is called "relief". So I bought a vintage Paramount Tenor. To raise the action, you need to push the bottom part of the heel piece away from the rim. It can also keep your banjo sounding new as you want to make sure the pot and the neck have a firm connection and haven't worked their way loose. Proper adjustment of your banjo's truss rod allows you to put a little bit of concave curve in the neck of your banjo to make the playability a lot easier. A far better, less risky way to set the string height on your banjo by adjusting the neck angle, is to use the coordinator rods like a pair of screw jacks. The relief affects the "action" or string height of the strings from the fingerboard. Adjusting your coordinator rods will keep the string action on your banjo at the correct height which will make playing your banjo easier. If it's the later, you'll need to remove the neck to adjust it, so unless you're serious about learning setup It's best to leave to a pro. If * Checking that truss rod adjustment is right, with the instrument strung, and tuned to pitch. help with neck adjustment. That means a neck heel adjustment and resetting the dowel at a different angle. Posted by 7 years ago. On some banjos the dowel (the part you call the 'post') is a continuous part of the neck and on some banjos it is a separate piece that is glued into a hole in the neck heel. There is no real adjustment for action height in that type of banjo, usually. truss rod adjustment: Adjusting the truss rod in the neck can often straighten out a neck that has a bit of a forward or back bow. This should be checked for accuracy, while holding the instrument in playing position, not laying down. This is a simple, but somewhat confusing step in banjo setup.