Removed the Shimano 600 crankset from the Miele Bike

Using a crank puller tool to remove the crank arms.

After removal...

The top potion of the tool is threaded into the crank arm, then the black hex portion is turned, which pushed on the center of the spindle to "un-press" the crank arm from the tapered square shaft of the spindle (basically working as a puller).

The black center potion of the puller is just small enough to go through the square hole in the center of the crank arm.

LH side of the bottom bracket (that's what the bearing assembly is called) and the spindle

RH side of the bottom bracket and the spindle.  Pretty dirty...

This is the tool, all assembled

The silver round tip on the bottom of this picture comes off of the shaft (not permanently attached).  In the case of the Miele bike, I took off the silver piece to pull out the crank arm.  There are different types of crank arms and bottom brackets where the silver piece would need to be used...

The other end of the tool is a socket that can be used to take off the bolt that goes into the spindle (I had previously removed these bolts on the Miele bike).

The socket is reversible and can be used for a 14 or 15 mm head bolt.  It's a very clever design.

The drive side crank arm assembly after removal.

Back side of the crank arm and the two gears.

FC-6207 (175 mm crank arm length)

Biopace is Shimano's name for an oval chain ring that was supposed to even out the rider's effort when pedaling.  I've not ridden a bike with an oval chain ring...

The big ring is 53 teeth and the small ring is 42 teeth.  On today's road bikes, these gears tend to be much smaller.