Calipers do not have a grease fitting. The only fitting is a bleed value and this is for brake fluid to come out of when you bleed the brakes. I bet you are trying to lube the caliper pins. Simply remove the pins holding the caliper on and use the appropate brake lube. You can pick up the correct lube at you local parts store
calipers
No.
The calipers or wheel cylinders are bad.
Yes. If your question is regarding the operation of the calipers. They do operate in the same manner as the front calipers.
The calipers are stuck, or they are cheap brakes, or somebody got oil or grease on the brakes and disks.
If the brakes are disc brakes then try opening the bleed screws on the calipers and see if the pressure releases if not then remove the calipers and replace because the piston is probably frozen or you can try pushing in the piston with a c-clamp,if that doesnt work replace the calipers as noted. If the brakes are drum brakes then check your brake cylinders to see if they are leaking if so you can usually rebuild them if not then replace them and bleed your brake system to get brakes back to normal, you can also make sure your drum brakes are adjusted correctly.
All brake hoses and calipers must be intact and hooked up to bleed any brakes. You cannot do it with hoses removed.
The rear calipers need to be screwed back in, best bet is to use a medium size pipe wrench(10") and allot of spray lube(WD-40), and screw them back in as much as possible. They will re-adjust the first time you hit the brakes if you put them in too far.
The brake proportioning valve may be sticking, but this is very uncommon. Did you lubricate the slider pins on the caliber or replace them if they are rusted or corroded? Check all contact points and clean them off throughly. Apply brake lube to all contact points.
first remove the calipers from the carrier then remove pads then calipers can not be pressed in you must use a tool to turn them in, then reinstall in reverse order
Brake calipers are what house the brake pads and fit over the rotor. If you are working on the brakes, usually the calipers need to be taken off in order to work.