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Joe K · 04-08-2020, 09:53 PM

There are three varieties of crank shaft pulley.

Original Type: The pulley rim is spoked, and the hub is made solid with the spokes/rim. Held in engagement with the crank gear key by the ratchet nut.

Replacement No. 1: The pulley rim is spoked, but the hub is separate from the spokes/rim and driven by a square "dog tooth." And held in engagement both crank gear key and dog tooth by the ratchet nut.

Replacement No. 2: The pulley rim is spokes, or possibly solid, but the hub is separate from the pulley sheeve, but "screwed" into place. The threads on these tend to rust in place making disassembly difficult. The ratchet nut is not needed for thread engagement but like Original is necessary to keep parts engaged with the crank gear key.

Again, hope this helps.

Joe K

04-08-2020, 09:53 PM	#3
Joe K Senior Member Join Date: Jul 2010 Location: Cow Hampshire Posts: 4,188	Re: crank pulley issue There are three varieties of crank shaft pulley. Original Type: The pulley rim is spoked, and the hub is made solid with the spokes/rim. Held in engagement with the crank gear key by the ratchet nut. Replacement No. 1: The pulley rim is spoked, but the hub is separate from the spokes/rim and driven by a square "dog tooth." And held in engagement both crank gear key and dog tooth by the ratchet nut. Replacement No. 2: The pulley rim is spokes, or possibly solid, but the hub is separate from the pulley sheeve, but "screwed" into place. The threads on these tend to rust in place making disassembly difficult. The ratchet nut is not needed for thread engagement but like Original is necessary to keep parts engaged with the crank gear key. Again, hope this helps. Joe K __________________ Shudda kept the horse.