Replaced the rear brake pad on the Springfield yesterday. Lot of discussion about best method. If you do not need to bleed the brake line then it is pretty simple. Good do download the Full Size Service manual (someone else has a post with that link). Read page 9.27. You have to get the muffler high enough to allow removal of the retaining pin. Found you can jack up rear where muffler attaches to rear frame as that is steel bracket. You just push the caliper against the rotor to push the pistons back and allow the release of the pads. Trickiest part is getting that little notch on the pad to get into the correct slot on the caliper. A little finagle and you can do it. Once pads are in just reinsert the retaining pin. You need to remove the rear master cylinder cap and wrap a rag around the fluid reservoir as a tad bit of fluid may spill out when you press the pistons back. You may want to remove the saddle bag so you can see in there easier.