My breaks failed. good pads, rotor, calipers, fluid. like no power. can push pedal all the way to manual brakes. Master cylinder?

little low fluid w/no sign of leak is fluid going into calipers from pad wear ---causes of brakes to floor --need brakes replaced--failing master--air in lines--leak--flex line failure--caliper failure

For some reason these vehicles you need to bleed brakes several times, had same problem, so air hangs up in lines somewhere it apears. When you say brakes sticks, describe it better, locked up, or dragging on rotors?
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air in system push break down look for bleeder on check valve if not break line loose at check valve retighten . pump break don t fix push pedal loosen another line tighten back check again

Removal & Installation Front To Remove:

1. Inspect the fluid level in the master cylinder reservoir. Remove fluid from the reservoir until the level is lower then half way between the MAX and MIN levels.
2. Remove the tire and wheel assembly.
3. Install 2 wheel nuts to secure the rotor on the hub.
4. Remove the bottom brake caliper pin bolt.
5. Pivot the brake caliper body upward and secure out of the way. Do NOT disconnect the hydraulic brake flexible hose from the caliper.
6. Compress the piston back into the bore using a C-clamp. Figure of brake assembly with caliper raised showing brake pads in mounting bracket
   
   
7. Remove the inboard and outboard brake pads from the brake caliper bracket.

To Install:

1. Install the brake pad retainers and both brake pads into the caliper bracket.
2. Pivot the brake caliper down over the brake pads and into the brake caliper bracket. Insert the lower brake caliper pin bolt and torque bolt to 70 ft-lb. (95 Nm).
3. Reinstall the tire and wheel assembly.
4. Lower the vehicle.
5. Refill the master cylinder. Pump the brake pedal several times to seat the pads against the rotor.
6. Check the master cylinder level and add fluid as necessary.

Rear To Remove:
Rear disc pads R&I

1. Inspect the fluid level in the master cylinder reservoir. Remove fluid from the reservoir until the level is lower then half way between the MAX and MIN levels.
2. Remove the tire and wheel assembly.
3. Install 2 wheel nuts to secure the rotor on the hub.
4. Remove the upper caliper mounting bolt.
5. Pivot the caliper down to access the pads.
6. Remove the inboard and outboard pads from the caliper bracket.
7. Remove the brake pad clips from the caliper bracket.
8. Compress the piston back into the bore using a C-clamp and the old inner pad.

To Install:

1. Install new brake clips in the caliper bracket.
2. Install the inboard and outboard pads in the caliper bracket.
3. Pivot the caliper up over the pads.
4. Reinstall the upper mounting bolt and tighten to 32 ft. lbs. (44 Nm).
5. Remove the 2 wheel nuts securing the rotor.
6. Reinstall the tire and wheel assembly.
7. Refill the master cylinder. Pump the brake pedal several times to seat the pads against the rotor.
8. Check the master cylinder level and add fluid as necessary.

Disc Brake Pads for Suburban 1500 Removal & Installation Front To Remove:
Front caliper mounting bracket

1. Remove the cover on the master cylinder and siphon out 2/3 of the fluid. This step prevents spilling fluid when the piston is pushed back into the caliper bore.
2. Raise and support the vehicle safely.
3. Remove the wheel and tire assembly.
4. Compress the brake piston back into its bore using a C-clamp.
5. Remove the 2 caliper mounting bolts. Lift the caliper off the rotor.
6. Remove the inboard and outboard pad.
7. Remove and discard the anti-rattle clips.

To Install:
Caliper bracket sleeves

1. Thoroughly inspect, clean and lubricate all caliper slide points, bolts and hardware.
2. Install new anti-rattle clips.
3. Position the inboard and outboard pads into the support bracket
4. With the 2 pads in position, place the caliper over the brake rotor and align the holes in the caliper with those of the mounting bracket.
5. Install the caliper mounting bolts through the sleeves in the inboard caliper ears and into the mounting bracket.
6. Tighten the mounting bolts to: 80 lb. ft, (110 Nm).
7. Install the tire and wheel assembly. Lower the vehicle.
8. Add fluid to the master cylinder reservoirs so they are 1/4 in. (6.35mm) from the top.
9. Test the brake pedal by pumping it to obtain a hard pedal. Check the fluid level and add fluid as necessary.

Rear To Remove:

1. Remove 2/3 of the brake fluid from the master cylinder.
2. Raise and safely support the vehicle.
3. Remove the wheel and tire assembly.
4. Remove the brake caliper mounting bolts. Suspend the caliper from the frame with mechanic's wire. Do not allow the caliper to hang from the brake hose.
5. Remove the brake pads from the caliper mounting bracket.
6. Remove and discard the anti-rattle clips.

Rear brake caliper

To Install:

1. Install new anti-rattle clips.
2. Position the brake pads to the caliper mounting bracket.
3. With the 2 pads in position, place the caliper over the brake rotor and align the holes in the caliper with those of the mounting bracket.
4. Install NEW caliper mounting bolts. Tighten to: 30 lb. ft, (40 Nm).
5. Install the wheel and tire assembly.
6. Lower the vehicle.
7. Refill the master cylinder to the proper level with fresh brake fluid. Pump the brake pedal slowly and firmly to seat the brake pads. Burnish the brakes as needed.

YOU NEED REMOVE A LITTLE BRAKE FLUID FROM MASTER CYLINDER.THEN YOU RAISE VECHICLE SAFELY.SUPPORT IT WITH JACK STAND.MAKE SURE VECHICLE IS ON LEVEL SOLID GROUND.REMOVE TIRE OR WHEEL.THEN YOU NEED A LARGE C - CLAMP.PLACE C - CLAMP OVER BRAKE CALIPER AND BRAKE SHOE BACKING.TIGHTEN C - CLAMP JUST ENOUGH PUSH CALIPER PISTON BACK IN CYLINDER BORE TO REMOVE CALIPERS FROM ROTORS.TO REMOVE BRAKE CALIPER YOU NEED 2 OPEN AND BOX END WRENCHES ONE TO HOLD CALIPER SLIDE PINS AND THE OTHER WRENCH FOR LOOSEN CALIPER BOLTS.THEN YOU REMOVE CALIPER AND REPLACE FRONT BRAKE SHOES.IF YOU NEED TO REMOVE BRAKE ROTORS JUST REMOVE THE BRAKE CALIPER CARRIER SUPPORT BOLTS THE REMOVE THE BRAKE CALIPER CARRIER SUPPORT THEN REMOVE ROTOR.YOU NEED TO REPLACE BOLTS WITH NEWS AND USE LOCK TIGHT.THEN YOU PUT IN NEW BRAKE PADS IN CALIPER PUT CALIPER BACK ON SUPPORT CARRIER.REPLACE WITH NEW BOLTS USE LOCK TIGHT THEN TORQUE BOLTS TO 26 FT LBS.MAKE SURE MASTER CYLINDER COVER IN PLACE.WHEN YOU FINISH REPLACING BOTH FRONT BRAKE PADS PUMP BRAKE PEDAL TO SEAT BRAKE SHOES AGAINST BRAKE ROTORS SO YOU WILL HAVE FIRM BRAKES WHEN YOU APPLY THEM. THEN CHECK YOUR BRAKE FLUID LEVEL IN MASTER CYLINDER MAKE SURE ITS NOT LOW. MAKE SURE YOU HAVE FIRM BRAKES BEFORE DRIVING.IF YOU HAVE ANY PROBLEMS CHANGING FRONT BRAKE PADS YOU CAN GO TO ANY AUTO PARTS STORE AND BUY A HAYNES REPAIR MANUAL.

YOU NEED TO REMOVE 2/3 BRAKE FLUID FROM MASTER CYLINDER.THEN YOU WILL NEED A LARGE C -CLAMP.OPEN C - CLAMP PLACE C - CLAMP OVER TOP BRAKE CALIPER AND AGAINST THE BACK OF THE OUTBOARD BRAKE PAD. THEN TIGHTEN THE C -CLAMP UNTIL THE CALIPER PISTON IS PUSHED INTO THE CALIPER BORE JUST ENOUGH TO SLIDE CALIPER OFF THE ROTOR.WARNING WHEN FINISHING BRAKE JOB.PLACE COVER BACK ON MASTER CYLINDER.TAKE FOOT PUMP BRAKE PEDAL UNTIL YOU GET SOLID BRAKES.THIS SEATS BRAKE SHOES AGAINST THE ROTOR.THEN RECHECK BRAKE FLUID LEVEL IN MASTER CYLINDER.

renew the master cylinder immediatly ,the seal between the front and rear chambers has failed. This is a dangerous vehicle and shouldnt be used in this condition it WILL FAIL SOON

Replacing brake pads involves pushing the pistons all the way back into the the caliper. This will force fluid up into the master cylinder. Sometimes it also allows some air to get past the piston seal and cause 'soft' pedal. In this case bleeding is required. Anyway the brake fliud should be completely changed by pressure bleeding at this time.

1. • Some of the fluid from the master cylinder
   • Wheels
   • 2 caliper guide pin bolts
   • Caliper assembly by swinging the top part of the caliper away from the brake rotor edge, then lift the caliper assembly up
   • Outboard brake pad by prying the brake pad retaining clip over raised area on the caliper. Then slide the pad down and off the caliper.
2. Before removing the inboard brake pad, use a large C-clamp to press the piston back into the caliper. This will prevent possible damage to the caliper piston. It is good practice to remove some (1/3–1/2) of the brake fluid from the reservoir. This is because as the caliper piston is pushed back into the caliper, brake fluid will be pushed back through the lines, back into the master cylinder and fluid reservoir, possibly causing the reservoir to overflow.
   • Inboard brake pad by pulling away from piston until the retainer clip is free from the cavity in the piston. Removal and installation of the disc brake pads

To install:

1. Lubricate both the caliper mating surface and the machined abutment surfaces with multi-purpose lubricant.
2. Before brake pad installation, be sure to lightly coat the outer backing plate surface of the new brake pads with a disc brake pad anti-squeal lubricant, usually a gel-like material that deadens any high-frequency vibration that can be the source of disc brake squeal.
3. Install or connect the following:
   • Brake pads into the caliper assembly making sure both pads are seated securely onto the caliper
   • Caliper assembly back into position over the brake rotor
   • Caliper guide pin bolts and torque to 17 ft. lbs. (23 Nm)
   • Wheels and lug nuts. Torque the lug nuts, in a star pattern sequence, to 100 ft. lbs. (135 Nm).
4. Top off the master cylinder to the appropriate level, using DOT 3 type brake fluid only.
5. Before moving the vehicle, pump the brakes until a firm pedal is obtained. Road test the vehicle to make sure the brake operation is normal.