Porter Cable 690LR Motor and Chuck Replacement

Use a Torx screwdriver to unscrew the 25.4 mm screws found at the top of the model.

Remove the top by gently lifting the cover from router body.

Use a spudger to pull off the plastic covering of the power switch.

Push the power switch through the top of the router. The power switch should now be completely detached from the router (besides the wire connections).

Find the wire plugs which are attached to the power switch. These connections are located at the back of the plastic box that houses the switch.

Use the spudger to carefully loosen the metal and rubber coverings, and detach the connections from the switch.

Use a pentalobe screwdriver to unscrew the 11 mm screw.

Use a pair of pliers to cut the white and red wires where they are crimped and the white wire connector.

Locate the two 20 mm screws on the base of the power cord.

Use a pentalobe screwdriver to unscrew the screws.

Use a phillips screwdriver to unscrew the two black 50 mm screws.

Remove the base.

Use a sharpie to mark where the base and the cap meet. This will allow you to make sure that you have all the alignment correct during reassembly.

Use a hammer or mallet to hit the base of the cap a couple times. The cap should pull away freely from the base.

With a rag in hand, hold the back of the motor tightly.

Locate the black hexagon chuck at the bottom of the router

Using a wrench, unscrew the chuck. The motor and the chuck will pull free from opposite ends of the base and can be replaced at your leisure.