Fox Alps 4 rebuild

The rebuild for the Fox Alps 4 is basically similar to the 4R and 5R rebuild described here:
http://oldbikeshop.blogspot.com/2017/05/fox-alps-shock-rebuild_7.html

The 4 wiper is the same as the 4R, and the bleeding it is the same as bleeding the 5R.

The biggest issue with the 4 is the overly complicated two-part damper piston. To remove it the bolt in the center of the piston must be removed, and the center portion of the piston pulled out, revealing 5 ports. Those ports must somehow be engaged to unthread the piston from the shaft. I ended up taking an angle grinder to a socket to make a 5 toothed tool to engage the ports.

The 5 ports on the Alps 4 damper piston.