All calipers are bolted firmly to the suspension. In order to get the rotor off, the caliper must come off also. With the caliper off and hanging on the spring, the rotor can then be removed.

Volvo brand wheels have a depression in the backside to receive the positioning pin. Jacks wheels do not, and that results in a problem. Without a pin to hold the rotor, he would have to use a lug 'bolt' to hold the rotor, then put on the caliper, remove the lug bolt, get the ill fitting wheel on and screw in the rest of the lug bolts.

Someone invented a locator pin, IPD has some, that screw into a lug screw so the wheel can then slide over the pin and hold the wheel inplace while the other lugs can be fitted. The pin is then removed and the last lug bolt is screwed in.

The 1998 C70 uses the same style rotor as the 240s, with the builtin drum, but the calipers are like the fronts for the 240. The front wheel calipers are much larger and better designed.

Klaus
--
Praying for Cynthia Amendt, heaven bound