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I though some of the forum members might enjoy seeing a Continenal A-40 crankshaft and how it differs from an A-65. I attached some photos of mine that I'm getting ready to clean and install. It was inspected, magnafluxed, and measured by the University of Illinois Aviation School at Champaign in 1995 and found to be servieable but has been in storage since.
Note it has only a front and rear main bearing - no center bearing. The taper & hub threads are identical to an A-65/85 shaft and the 65/85 hub will fit but the A-40 hubs have a smaller prop bolt pattern. Shaft has no counter wieghts. The front threaded cleanout plug is the same as a 65/85 shaft also
The A-40 shaft has five welch type plugs that can be removed to clean out the oil passages. Four in the crank throws and one in the rear of the shaft. They have been removed from my shaft and new ones came with the project. Anyone who could give me some tips on installing them please let me know - especially the best way to stake the plugs once installed.
The large plug which goes in the rear of the shaft must be driven in about 3/4 of an inch as the single magneto is driven by the crank gear and the magneto shaft sticks thru the gear into the crankshaft. The original plug's side wall was about 3/4 inches deep but none can be found that match it.
Please reply with any questions or comments
Thanks very much
Bill
Note it has only a front and rear main bearing - no center bearing. The taper & hub threads are identical to an A-65/85 shaft and the 65/85 hub will fit but the A-40 hubs have a smaller prop bolt pattern. Shaft has no counter wieghts. The front threaded cleanout plug is the same as a 65/85 shaft also
The A-40 shaft has five welch type plugs that can be removed to clean out the oil passages. Four in the crank throws and one in the rear of the shaft. They have been removed from my shaft and new ones came with the project. Anyone who could give me some tips on installing them please let me know - especially the best way to stake the plugs once installed.
The large plug which goes in the rear of the shaft must be driven in about 3/4 of an inch as the single magneto is driven by the crank gear and the magneto shaft sticks thru the gear into the crankshaft. The original plug's side wall was about 3/4 inches deep but none can be found that match it.
Please reply with any questions or comments
Thanks very much
Bill
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