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The Fender B-Bender was designed by Gene Parsons and Meridian Green and is manufactured by the Fender Musical Instrument Company in Corona, California. It is an extremely robust and well-built unit and when properly set up will provide smooth, silent, trouble and maintenance free operation for many years. Fender B-Benders simply do not wear out.
Occasionally problems with the operation of Fender B Bender may arise because of improper assembly or set up. This technical guide is designed to help the guitar technician troubleshoot the cause of problems and assist them with appropriate remedies.
Note: Lubrication to any parts of the device other than the B bridge saddle is never necessary. If squeaking returns or string breakage is experienced, the bridge saddle may need to be carefully filed and smoothed where the B string contacts it or in rare cases replaced. Possible Cause #2: The Return Spring may be rubbing on the side of the Connecting Rod Clevis.Remedy: Bend the end loop of the Return Spring where it attaches to the Clevis Pin so that the Return Spring is not in contact with the side of the Clevis body.Photo B: Return Spring and Clevis
Photo DIf this is indeed the problem, it will be easy to identify even before the unit is removed from the guitar because the B string hole in the String Pulling Pendulum,(visible through the slot in the Back Cover Plate, (see Photo E), will be positioned too far back in the slot to allow the insertion of a new B string without moving the Strap Lever. If the Strap Lever has to be pulled in order to insert a new B string, this is a sure sign that the unit was improperly set up and needs to be adjusted.
Remedy: Shorten the length of the Connecting Rod by removing the screws that secure the Tower, and rotating the Tower and Connecting Rod as a unit so that the Connecting Rod threads farther into the Clevis.
Photo E: Pendulum, exterior view, correctly adjusted and out of adjustmentOne, or two clockwise turns should do the trick. Re-attach the Tower to the Back Cover Plate and check to make sure the Connecting Rod is not touching the Tower when the StringBender is in the "home" position. The unit should function silently and smoothly now when pressure on the Strap Lever is released and the mechanism returns to its "home" position.
Photo F: Tuning mechanism, interior bottom view
Possible Cause #4: Tuning Mechanism is loose.
Possible Cause #1: The B string is binding in the B bridge saddle groove.
Possible Cause #2: The B string is binding in the nut.
Possible Cause #3: Tuning problems can result if any of the Parsons/Green, Fender B Bender components are not working absolutely freely without binding, or if any component mounting screws have become loosened, or if there is possibly some foreign object/objects inside the guitar.
If after removing up to six loops from the Return Spring, the tension is still insufficient, a new Return Spring may be necessary.
Some players like more return tension than others. My personal preference is when there is just enough tension for the unit to completely return from any position, (even when the Strap Lever is just slightly pulled up), but no more tension than is necessary. Too much tension will make the Parsons/Green Fender B Bender difficult to use particularly when playing up the neck where there is less leverage available to press down the neck.Problem I: String Breakage (String breaks 1-1/2" inches from string ball)
Where the Fender B Bender is installed in guitar bodies that are thicker than a standard Telecaster body, this should be done during the installation.