Full swing plate Installation Instructions
If you need to replace the entire swing plate assembly (if the white gear is also worn out) you might consider sending your printer to us for repair. This is the most challenging repair we have posted on this website. However, for the advanced technicians, we are providing full instructions for replacing the entire assembly yourself. This is a huge job, figure several hours if it's your first time, and there are several cautions involved: don’t strip any of the screws, don’t break the fan connectors, good luck with the springs 
— they're tricky to re-install.
AGAIN, this procedure is considered advanced maintenance. We recommend this procedure only be done by advanced printer technicians. We also recommend this procedure only be done when both gears in the swing plate assembly are worn out. There is a simpler procedure that will work in most cases, when only the black gear is worn.
Step 1: Install the PrinterTechs metal gear into the New Assembly
Carefully remove the screw pictured below.
There is a small white plastic "clip" on the assembly; pry this clip up and you can throw it away -- you won't need it with the new PrinterTechs metal gear.
Flip the assembly over and remove the metal pin.
Remove the black gear and spacer from the assembly.
Save the spacer -- it will be used with the new metal gear.
Reinstall the black spacer. One side of the spacer has a slightly raised circular rim. Install as shown below with the raised rim facing down, flat side facing up.
One side of the metal gear has a bearing in the middle. With the bearing facing down, slide the gear in on top of the spacer.
Insert the pin through the hole in the spacer and in the gear, to hold them in place. When the head of the pin rests flush against the metal plate, you can attach the screw into the other side of the pin, as shown below.
Now refasten this screw, and you've finished assembling the new swing plate assembly.
CONTINUED . . .
