Reply to "Help, Pilot crank incert trouble...."

...I've Never seen 'This' Before!! What You have there, is a 'Custom' Machined Sleeve that allowed the use of a Smaller Diameter Bearing, that 'just
happened' to fit the ZF Input Shaft! Probably aquired at a Bicycle Shop!
The welding/shrinking works!! We use it all the time down at our Machine Shop to remove bearing Races that we Can't Get 'Behind' to Knock them out!
If You Don't have a ARC Welder, here are a couple other ways to get it out.
The steel looks soft.
Get ahold of one of those 'handles' at the hardware store; that holds ONE end of a 'Hacksaw' Blade, leaving the other end hanging OUT Free. Saw all the way through the side of the Sleeve 'Ring'.
The Idea is to cut a Slot in the wall so the Sleeve can collapse, relieving pressure, and the sleeve will slide right out.
Don't want to saw!! You can Drill through the wall, You only have to drill one spot so you can 'Break' it. Also!
You can use a 'Dremel' Tool OR High Speed Grinder with a Grinding Stone!
You just have to cut through enough to release the Interference Fit!
Ask Jim Cozzolino! He had the same problem and had to grind through a HARDENED bearing Race, to get it out! He had said that once done "It Popped Right Out!!". Be sure to wear Eye Protection!! If You 'Gouge-Up' the 'Crank Pocket' just a Little in that One spot, Don't worry! The Bearing will still Stay Put when You Hammer it In! (Use Protection on the Bearing FACE!) Last!! Should the Sleeve NOT be in very Tight, You can try using a Long Bar or Pipe that JUST Fits Inside, then PRY and TIP Side to Side, Up and Down; this may 'Wedge' the Sleeve Out! Good-Luck with It!