I’m not going to disassemble the rear drive as there were no problems with it. Since the rear brakes are mounted on the rear drive, I advise a face mask and gloves to avoid getting brake dust where it doesn’t belong, your lungs.
Here are the pictures of the rear drive when I took it off the bike.
I pulled the rear brake arm off the shaft so I can push the shaft out to remove the rear brakes. There is a felt ring under the arm.
Using a soft mallet, I knocked the brake lever shaft out the back to release the brake shoe assembly.
Then, using a screw driver I lifted the other side of the brake shoes over the fixed pivot to remove them. Here is the disassembled brake components.
Inspecting the brake lining, I could see the lining had cracked, so some more parts to order.
And here is the washer that goes between the boss and shoulder of the brake shaft. It stuck to the boss.
I put the rear drive in a plastic pan and liberally applied Gunk engine degreaser and worked on the hardened grunge with a stiff nylon brush and tooth brush. After rinsing the Gunk off, I used the parts washer and a tooth brush to get another layer of grime off the cast aluminum. Then, using AutoSol aluminum cleaner and a Scotch Brite pad, I got the stains and corrosion off the housing. Then I used “00” steel wool with more aluminum cleaner get a luster on the rough casting finishing up with aluminum polish. On the left is the cleaned and polished casting and on the right is after parts washing with gear lube stains still showing.
On the inside of the drive where there was a crusty mix of brake dust, some brake cleaner did the trick. Using a stiff nylon bush and toothbrush, I got all the grunge off the nuts and casting.
I used Permatex gasket remover and a putty knife to clean the old gasket off the end that connects to the swing arm. I finished up with “000” steel wool to polish the surface making it ready for a new gasket.
I used aluminum cleaner on the brake lever with “000” steel wool to bring the shine back finishing up with aluminum polish. The wire wheel cleaned the pivot lever, springs, brake lever Allan head bolt and the brake rod bushing. These I finished up with metal polish.
When the brake shoes come in, I’ll assemble the brake shoes and the rear drive will be ready for attaching to the swing arm.