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« on: September 14, 2016, 06:28:23 AM »
As I have been rebuilding 2 auto clutches for projects, one being a single track and the other a double track, I thought I would post a few pictures of each. I have also identified 4 different variations of auto clutches used on the 2 wheel bikes, and a different one used on the late model trucks. This is not including the Salisbury unit used on a few of the earliest automatic trucks.
Picture #1: An overview of the 2 I am working on. Since track on left, double on right. Notice the 2 retaining rings on the double track. These are not used on the single track and I have had the pulley walk out on a single track clutch, so it seems this was a necessary improvement.
#2-4 Notice the difference in the drive pulley. The single track uses bearings while the double uses a bushing. I feel this was an attempt to save money and a downgrade.
#5-6 Back side of drive pulleys. Single track used a bolt-on steel plate whereas double was cast into pulley.
#7-8 Early vs late style idler. Not sure reason for change, they both work equally well.