Removed caliper and brake pads on 1991 240 volvo need info to put every thing back the right way.

brakes are brakes, push in , turn in, or two piece calipers. remove wheel , remove two bolts that hold caliper in place, remove replace pads if rotors look good if not remove caliper retainer and rotor replace or have resurfaced at local part store with service. if push in piston push in with c-clamp or piston tool, if turn in will be solid on top with slots for tool to turn in turn to right, tool can be gotten at parts store, if two piece take apart and put back then bleed brakes.

Front brake
Step 1: Identify Front Disc Brake Components

Front Wheel Drive Brake Assembly
Most front disc brake components include: brake rotor, brake pads, brake caliper, caliper mount and brake flex hose. Brake service usual occurs between 20,000 and 40,000 miles depending on driver habits, road conditions and brake pad/ rotor materials used.
Step 2: Remove Brake Caliper to Replace Pads

Removing Brake Caliper Mounting Bolts
Locate primary caliper mounting bolts; apply wrench pressure counter-clockwise (When looking at the head of the bolt) to remove the bolts, upper and lower. Make sure the bolt threads are in good shape and replace if necessary.
Step 3: Remove Front Brake Caliper

Remove Front Brake Caliper
After removing the primary caliper mounting bolts lift the brake caliper off of the rotor and then tie or secure to the side, being careful not to bend or kink the brake caliper flex hose. Thoroughly inspect brake caliper and brake hoses for leakage, cracks or chaffing and replace as needed. Next remove the brake pads (If not mounted in the caliper) and secondary caliper mounting bolts. Notice how great protective gloves work, most technicians use them on the job today.
Step 4: Remove Brake Pads

Remove Front Brake Pads
Once the brake pads have been removed, make sure if there is anti rattle hardware to transfer to the new brake pads. Some brake pad manufacturers will include the proper lube (Caliper slides) and anti-rattle hardware to ensure proper performance of their product.
Step 5: Remove Caliper Mount

Remove Caliper Mount Bracket
Finish removing secondary caliper mount bolts and remove caliper mount. Note: clean and lube caliper slides and pad friction surfaces of all foreign material or build-up.
Step 6: Remove Brake Rotor

Remove Brake Rotor
With the caliper mount out of the way you can now remove the brake rotor. Sometimes it can get stuck so you may need to tap it with a hammer or use penetrating oil to free it up. Some manufacturers use small screws to hold the rotor on as well. Clean and inspect wheel studs, replace if any are damaged. Also clean bearing hub rotor mount surface to ensure the proper mounting of the new brake rotor. Inspect the ABS sensor wheel for cracks or damage and replace as needed.
Step 7: Depressing the Brake Caliper

Resetting Brake Caliper
To install the new brake pads you must retract the brake caliper piston. Remove the master cylinder lid or open the brake caliper bleeder screw to allow excess brake fluid to be released if necessary. Install C clamp tool and gently tighten clamp until caliper piston is fully depressed. Note: use old brake pad to protect the caliper piston. Close the bleeders once the piston is retracted completely
Step 8: Installing New Brake Rotor

Install Brake Rotor
Install new brake rotor, the new rotor is manufactured with a protective film over the rotor to keep it from rusting, remove protective film with brake cleaner before installing; also after the brake job is complete you may experience a small amount of smoke from the rotor when first used. This is normal and will go away after the first couple of uses.
Step 9: Installing New Front Brake Pads

Installing New Brake Pads
Reinstall the front brake caliper mount, and then install front brake pads. Make sure the pads are seated properly in the caliper mount; it must be a close fit to work properly..
Step 10: Reinstall Front Brake Caliper

Re-Install front Bake Caliper
Reinstall front brake caliper and reinstall caliper-mounting bolts, recheck all mounts and mounting bolts. Check the caliper slides to be sure there is no bind and that the caliper moves freely back and forth on the caliper slides. Bleed brake system per manufacturer's specifications to relieve any air trapped in the system. Before driving the vehicle, push the brake pedal down and let it up slowly, repeat until normal brake pedal operation resumes, this operation is forcing the brake pads to travel to the brake rotors.

put on jack stands then take tire off and then take 2 bolts off caliper remove old pads and depress caliper with a vise clamp then put new pads on then put caliper back on and tire then bleed the brakes and check brake fluid top it off

You'll need a few Metric wrenches and a large C-clamp or brake caliper piston tool to collapse the piston back into the cylinder. Unbolt the caliper, remove the old pads, install the new pads. Lubricate the areas where the caliper and pads go. Push the caliper piston back into the caliper and reinstall the caliper and tire. Make sure you pump up the brakes before you drive, to get the new pads seated.

The pads are mounted to the caliper. The caliper is bolted to the spindle bracket. There is brake hardware which should be replaced with the pads.
Look behind the wheel at the backside of the spindle bracket. The spindle bracket is on the verticle shaft with coils on one end and an A shaped bracket on the other. There are usually 2 bolts that may have normal bolt ends or "Allen" bit fittings.

When you buy the brake hardware you can check for the proper socket for the mounting bolt. You unbolt the caliper, use a rope or wire to suspend it under the frame without disconnecting the brake line.

The pads come off with the hardware. You need to compress the caliper pistons to make the new pads fit. Use a C clamp and an old pad to squeeze the pistons back into the caliper. Remove the Master Cylinder cover so fluid can return.

Then use a bonding chemical like "brake quiet" to mount the rear pad to the caliper piston. Mount outside pad to caliper and then slide caliper over the rotor on the spindle bracket. Lube the slides of the new brake hardware and bolt into place.

You should have the rotors checked for thickness and whether they are warpped before you put on the new pads.

not hard at all.remove tires.then remove 2 screws either 12mm or 14mm that hold the brake caliper in place.remove caliper but DO NOT disconnect the brake line from the caliper.get a C-CLAMP in order to get the caliper piston pushed back in.remove old brake pads and install new ones in the same order as the old ones were removed.you will want to check the rotors to make sure they are in good condition before you install the new pads,then put caliper back on and tighten screws to specs.do the same on the other side and always remember to PUMP YOUR BRAKE PEDAL A FEW TIMES IN ORDER FOR THE CALIPER PISTONS TO ENGAGE ON THE NEW PADS. hope this info helps.good luck and take care, manny

not bolts but pins! i would get a manual even then there not fool proof,,,like the "haynes" book of lies???

front ones remove wire clip remove bolts from caliper hang caliper out of way remove pads remove 2 bolts from pad carrier put to one side remove 2 disc retaining bolts remove disc may need hammer clean hub flange with wire brush fit new disc clean pad carrier and refit fit new pads put some copper grease on back of pads push in caliper piston slowly using large grips or g clamp fit and secure caliper pump up brake pedal check brake fluid level do other side for rear brakes see my solutions

1. Raise and support the vehicle
2. Remove the desired wheel
3. Loosen/remove the two caliper retaining bolts.
4. Remove the caliper from the wheel
5. Using a C-clamp, depress the caliper piston until it's completely recessed.
6. Remove the old brake pads
7. Install the new brake bads on the caliper
8. Reinstall caliper on the disc
9. Reinstall/tighten the calpier bolts
10. Put the wheel back on
11. Lower the vehicle.

*** When you are getting set let the car roll a few revolutions of the wheel to keep the pads off the disc. It will make it easier to get the caliper off.

jack up the rear of the car remove wheels and tires, remove the two caliper bolts, remove old brake pads, using a c clamp push each piston the the caliper bake in install new pads, reinstall caliper install wheels and tires lower the jack and your done
caliper bolts are torque head bolts be sure to have the proper size before trying to change the brakes