Tip & How-To about Isuzu Trooper

Cheap and easy way to collapse a caliper

When replacing disc brake pads it is always nescesary to collapse the caliper again as the piston that presses the pads against the rotor is protruding too far for the (thicker) new pads to fit. Using screwdrivers and such can damage the caliper, so there are several tools available for purchase. I just figured I'd make my own.
Refer to the diagram
Use a piece of flat bar(B), more or less 1 by 4 inches and about 3/8 inch thick. Find a bolt and nut(A) that fit to each other, let's say at least half inch thick and about 2 inches long. Drill a hole in the flat bar, big enough for the bolt to fit through, weld the nut over the hole and you're good to go.
When collapsing the caliper(5), assemble the newly made tool(just screw the bolt(3) into the nut) place the flat bar(2) against the piston(1), use an old pad(4) and fit it into the caliper (this is something for the bolt to push against), and uncrew the bolt until the piston has been pressed back into the caliper.


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1999 Yamaha Kodiak Front Disc Brake - Rebuilt master cylinder with new parts. Replaced orings on piston in front caliper and bleed brakes using new fluid. The piston will not retract. What is proble


The brake hose is clogged. When under pressure from applying breaks, the piston is forced tight to the rotor. When released the fluid will not return through the hose because there is no real pressure. Replace the hose.
murf427

Jul 31, 2012 | Cars & Trucks

1 Answer

Tools required to change brake pads on 2003 impala


Removal & Installation
  1. Siphon 2 / 3 of the brake fluid out of the master cylinder.
  2. Mark the relationship of the wheel to the wheel stud for re-installation purposes. Remove the tire and wheel assembly.
  3. Install 2 lug nuts to secure the rotor in place when the caliper is removed.
  4. Install a large C-clamp over the top of the caliper housing and against the back of the outboard shoe. Slowly tighten the C-clamp until the caliper pistons are pushed into the caliper bore enough to slide the caliper assembly off the rotor. Use care not to tighten the C-clamp too far or the outboard shoe retaining spring will be deformed and require replacement.
  5. Remove the caliper mounting bolts and remove the brake caliper from the mounting bracket.
  6. DO NOT disconnect the brake hose from the caliper or allow the brake hose to support the weight of the caliper. Support the caliper on a piece of wire out of the way.
  7. Remove the outer brake pad from the caliper using a suitable prying tool to lift the outboard shoe retaining spring so that it will clear the caliper center lug and pull the brake pad out of the caliper.
  8. Remove the inner brake pad by unsnapping the shoe springs from the piston.

To install:


  1. Clean all parts well. If the brake pads were worn so badly that the brake rotor is damaged, it must be replaced. Light scoring of the rotor surfaces not exceeding 0.060 inch (1.5mm) in depth is not harmful to brake operation and may result from normal use. Brake rotors may be refinished. Do not use a rotor that, after refinishing, will not meet the thickness specification cast in the rotor. Always replace with a new rotor.
  2. If not done at removal, now use a C-clamp and clamp both pistons at the same time with a metal plate or wooden block across the face of both pistons. Take care not to damage the pistons or caliper boots.
    NOTE After bottoming the pistons into the caliper bore, lift the inner edge of each caliper boot next to the piston and press out any trapped air. Make sure each boot convolution is tucked back into place. Boots must lay flat.
  3. Inspect the caliper bushings for wear. Replace as necessary. Carefully inspect the slide bolts for corrosion. If corrosion if found, use new parts including the bushing assemblies when installing the caliper. Do not attempt to polish away corrosion. Lubricate caliper slide bolts with silicone grease.
  4. Install the new inner disc brake pad in the caliper by snapping the shoe retainer springs into the piston making sure both sets of locking tabs are seated in the caliper pistons. The pad must seat flat against the pistons.
  5. Install the outer pad into the caliper by snapping the outboard shoe retaining spring over the caliper center lug and into the housing slot. The pad will slide up onto the caliper and the retaining ring will lock into place on the groove in the caliper.
  6. The outer pad wear sensor should be at the trailing edge of the shoe during forward wheel rotation.
  7. Install the caliper mounting bolts and torque to 80 ft. lbs. (108 Nm).
  8. Remove the 2 nuts temporarily securing the rotor.
  9. Install the tire and wheel assembly and tighten to specification.
  10. Pump the brake pedal several times to seat the pads against the rotor.
  11. Check the brake fluid level and top off as necessary.
  12. Road test the vehicle to ensure the proper brake performance.

Good job (remember rated and comment this).

Sep 10, 2010 | 2003 Chevrolet Impala

1 Answer

replace rear brake pads


Rear disc brake pads offer better performance and are not as affected by moisture like conventional brake shoe style brakes are. Rear disc brakes are similar to front disc brakes. The main difference is that rear disc brake systems must incorporate the emergency brake system. There are two methods widely used for the emergency brake with rear disc systems. The first system is a brake shoe inside the brake disc that is actuated by the emergency brake lever. The second is a screw style actuator inside the brake caliper. When activated the brake pads are forced into the brake disc and held tightly by the emergency brake lever.
READ COMPLETELY BEFORE STARTING
Step 1 - Identify Rear Disc Brake Components
rear_brake_pads.jpg Rear disc brake assembly includes; rear brake disc, rear brake pads, brake caliper mount and a caliper mounting screw. (Note: Some vehicles do not have the rotor mounting screw.)
Step 2 - Removing the Rear Brake Caliper Mount Bolts
rear_brake_pads_2.jpg To replace rear brake pads and rotors the rear brake caliper needs to be removed. First loosen the rear brake caliper mount bolts and remove them. Turn counter clockwise.
Step 3 - Lift Rear Brake Caliper from The Caliper Mount
rear_brake_pads_3.jpg After the caliper mount bolts have been removed, gently lift the brake caliper from the caliper mount. Inspect the caliper slides; they should move freely in the caliper mount. Remove rear brake pads and hardware.

Step 4 - Removing Caliper Mount Bolts
rear_brake_pads_4.jpg With a socket wrench or other appropriate removal tool, loosen the rear brake caliper mounting bolts. Remove bolts and lift the caliper mount and remove it from the vehicle. Remove the retaining screw from the disc mounting hole. Tap the rotor gently to release any rust that has accumulated between the rotor and bearing hub. Lift brake rotor from wheel hub holding on tightly, using both hands. You do not want to drop the rotor.

Step 5 - Removing Rear Brake Rotor
rear_brake_rotor.jpg Remove the retaining screw from the disc mounting hole, tap the rotor gently to release any rust that has accumulated between the rotor and bearing hub. Lift brake rotor from wheel hub, hold on using both hands and do not drop.

Step 6 - Install New Brake Rotor
rear_brake_rotor_2.jpg Check the new rotor against the old brake rotor to make sure they are the same size. Clean the mating surface on the wheel hub before the new brake rotor is installed. Reinstall rotor retainer screw.
Step 7 - Reset Rear Brake Caliper
rear_brakes_7.jpg Before new brake pads can be installed, the rear brake caliper must be reset. The reset tool winds the piston back into position so the new brake pads will fit. This style of brake caliper will not compress with a clamp tool; it can only be reset with the proper reset tool.
Step 8 - Reinstall Rear Caliper Mount and Install New Rear Brake Pads
rear_brake_rotor_3.jpg After the caliper has been reset, reinstall caliper mounting bolts and make sure the bolts are tight. Then match up the old brake pads to the new brake pads. They should be exactly the same except, of course; the old ones will be worn out. Check the new brake pads for proper fit and install any brake hardware that is required.
Step 9 - Remount Rear Brake Caliper
rear_brake_rotor_4.jpg Reinstall the brake caliper, align brake pad hardware and reinstall caliper mounting bolts. (Note: align the rear peg of the brake pad to the groove in the caliper piston.) Recheck and retighten all caliper and caliper mount bolts. Bleed brake system to relieve any air in the system. Before driving the vehicle, push the brake pedal down and let it up slowly. This operation forces the brake pads to travel to the brake rotors. DO NOT DRIVE VEHICLE until proper brake pedal operation resumes. When test driving vehicle listen for any unusual noises during the operation of the brakes.
WARNING! Always have the vehicle under inspection on level ground, in park with the emergency brake on. Always wear protective eyewear, gloves and necessary clothing before inspection or work begins. Never crank an engine over when anyone is near the battery or engine. Always have an operational fire extinguisher close by, obey all first aid instructions in the event of an injury. Never stand in front or behind a vehicle when cranked over or running. When engine is cranked over keep hands and clothing away from rotating components. Never move a car without proper brake pedal operation.

Jun 01, 2010 | 1995 Saab 900

1 Answer

need help changing brake pads and routers on 2003


Remove brake fluid from the master cylinder brake fluid reservoir until the reservoir is approximately 1/2 full. Discard the removed fluid.
  1. Raise and safely support the front of the vehicle. Remove the front wheels.
    1. Remove or disconnect the following:
    2. Front brake caliper guide pin bolts
    • Brake caliper by slowly sliding it up and off the adapter and brake rotor. Support the caliper out of the way with a strong piece of wire. Do not let the caliper hang by the brake hose or damage to the brake hose will result.
    1. If necessary, compress the caliper piston into the bore using a C-clamp. Insert a suitable piece of wood between the C-clamp and caliper piston to protect the piston.
    2. Outboard disc brake pad from the caliper by prying the brake pad retaining clip over the raised area on the caliper. Slide the brake pad down and off the caliper.
    • Inboard disc brake pad from the caliper by pulling the brake pad away from the caliper piston until the retaining clip on the pad is free from the caliper piston cavity
  • To install:
    1. Be sure the caliper piston has been completely retracted into the piston bore of the caliper assembly. This is required when installing the brake caliper equipped with new brake pads.
    2. If equipped, remove the protective paper from the noise suppression gaskets on the new disc brake pads.
    3. Install or connect the following:
      • New inboard disc brake pad into the caliper piston by pressing the pad firmly into the cavity of the caliper piston. Be sure the new inboard brake pad is seated squarely against the face of the brake caliper piston.
      • Outboard disc brake pad by sliding it onto the caliper assembly
      • Brake caliper assembly over the brake rotor and onto the steering knuckle adapter
      • Caliper guide pin bolts and torque to: 35 ft. lbs. (47 Nm) on 2002–04 models or 26 ft. lbs. (35 Nm) on 2005 models
      • Front. Apply the brake pedal several times until a firm pedal is obtained.
    4. Check the fluid level in the master cylinder and add fluid as necessary. Road-test the vehicle.

    For the rotors:

    1. Remove brake fluid from the master cylinder brake fluid reservoir until the reservoir is approximately 1/2 full. Discard the removed fluid.
    2. Raise and safely support the front of the vehicle. Remove the front wheels.
    1. Remove or disconnect the following:
    2. Front brake caliper guide pin bolts
    • Brake caliper by slowly sliding it up and off the adapter and brake rotor. Support the caliper out of the way with a strong piece of wire. Do not let the caliper hang by the brake hose or damage to the brake hose will result.
    1. If necessary, compress the caliper piston into the bore using a C-clamp. Insert a suitable piece of wood between the C-clamp and caliper piston to protect the piston.
    2. Outboard disc brake pad from the caliper by prying the brake pad retaining clip over the raised area on the caliper. Slide the brake pad down and off the caliper.
    • Inboard disc brake pad from the caliper by pulling the brake pad away from the caliper piston until the retaining clip on the pad is free from the caliper piston cavity
  • To install:
    1. Be sure the caliper piston has been completely retracted into the piston bore of the caliper assembly. This is required when installing the brake caliper equipped with new brake pads.
    2. If equipped, remove the protective paper from the noise suppression gaskets on the new disc brake pads.
    3. Install or connect the following:
      • New inboard disc brake pad into the caliper piston by pressing the pad firmly into the cavity of the caliper piston. Be sure the new inboard brake pad is seated squarely against the face of the brake caliper piston.
      • Outboard disc brake pad by sliding it onto the caliper assembly
      • Brake caliper assembly over the brake rotor and onto the steering knuckle adapter
      • Caliper guide pin bolts and torque to: 35 ft. lbs. (47 Nm) on 2002–04 models or 26 ft. lbs. (35 Nm) on 2005 models
      • Front. Apply the brake pedal several times until a firm pedal is obtained.
    4. Check the fluid level in the master cylinder and add fluid as necessary. Road-test the vehicle.

    May 28, 2010 | 2003 Chrysler Town & Country

    1 Answer

    instructions for replacing front disc brakes.


    Jack up the car, support with a jack stand. Remove the wheel, unbolt the 2 bolts on the back of the caliper, and remove the caliper and pads off the rotor. Then with a large C-clamp or caliper piston tool and the old brake pad, push the brake piston back into the caliper until it is completely seated, install the pads, lubricate where the calipers slide and reinstall. Make sure to pump the brake pedal after you are done to get the new pads against the rotors before driving.

    May 22, 2010 | 1998 GMC Jimmy

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