REMOVAL SEQUENCE: Bend the outer housing away from the outer plate, only next to the three ears. Carefully pry loose the outer plate and set it aside. Dump out all gears and shafts into a separate pile. Flip the motor housing over and file the three brass rivets down to base metal. Press the rivets through the housing. Shake out the inner plate being careful not to bend or loosen the gear shafts, THIS IS IMPORTANT! Remove the center post gear & impeller from the outer housing. Now remove the three brass rivets from the inner plate, carefully! It's best to clip them from the inside and pull them out from the other side. Note the flat brass spring on this plate. Carefully pry it loose from the plate, clip one of the ends loose and put back on shaft #2 to space out the four bumps gear. The motor will come through the hole where the first gear (phenolic & brass) was. I usually use pliers and work the shaft back & forth until it comes free. Keep it, may use it someday. Now you have a pre-drilled centered hole for the motor shaft.
FITTING GEAR TO MOTOR SHAFT: Using the brass gear on the funny-shapped impeller. Drill out the center of this gear to press-fit to the motor shaft. Then remove it from the impeller and press it onto your motor shaft.
MOTOR MOUNTING: Mark the holes to mount your motor to the plate of choice. The outer plate is my choice. Drill & mount the motor taking care to observe gear engagement.
SOLDERING OUTPUT SHAFT: Carefully pry the flat copper spring loose and cut free. Carefully pry loose the steel plate, that is the rachet plate, and discard. Scrape the brass gear clean around the square shaft area and scrape clean the square part of the output shaft. Make sure that the gear doesn't wobble before soldering, some wobble can be adjusted by tapping on the brass ring to tighten the gear to the shaft, before soldering. With an appropriate wattage soldering iron, solder the gear to the shaft all around the square part. Do not overheat this gear assembly or the brass gear will loose it's temper and be too soft to use.
NOT USED: The phenolic gear and it's steel gear are not used in re-assembly and can be used for a spare motor shaft gear.