Remove the main clutch body and the springs and spring cups will be visible. You can see the large socket in the center supporting the clutch basket. This makes it easy to deal with the spring caps because they will be held in place by gravity. If you bought new springs remove the old ones and place the new ones in the cups.
Inspect the clutch main body for wear. The interior components of the clutch don't run on bearings, but run on brass bushes at the friction points. This clutch had a cracked brass bushing which allowed the bushing to slightly expand in size and lock to the clutch center gear instead. I'm not sure how the damage above happened on the surface of where the bushing should be, but this entire part should be replaced and a new brass bushing will be added to the new piece.
The cracked bushing can be driven out of the clutch center gear by using a suitable sized socket and hammer to pound it out from the back side. In order not to bend the steel plate, don't support the piece by the plate while pounding the bushing. Usually they are a loose fit and just holding the center in your hand is enough support to bang it out.
Fit a new brash bushing to the main clutch body. This should be a nice tight fit so the bushing does not turn. Use a large socket or flat piece of metal to tap it until the lips are flush.
Then fit the second brass bush ring with the small lip facing upwards. This is a very loose fit and can rotate freely.
Place the main clutch center over the springs so that they seat in the recesses on the back side. I have always aligned the two holes shown above with arrows but I don't know if it really makes a difference.
Fit the main clutch center and spin it to be sure it rotates well. Above is a shot of the clutch plates in their correct order from left to right.
Fit the first cork plate and make sure the tabs are closely aligned with the tabs of the main clutch as it will make them easier to drop down in the basket when the clutch is compressed.
Fit a steel plate which interfaces with clutch center teeth. Keep alternating cork and steel plates until you get to the final one side cork plate.
Once all the plates are in and the final one side cork plate fitted, compress the clutch and help all the cork plate steel tabs drop down in the clutch basket.
Finally, fit the retaining ring in the groove in the clutch basket and your clutch is ready to reinstall.
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