Delco 3400
Brake Pads Replacement (Delco 3400)Removal Procedure
1. Inspect the fluid level in the brake master cylinder.
2. If the brake fluid level is midway between the maximum-full point and the minimum allowable level, no brake fluid needs to be removed from the reservoir before proceeding.
3. If the brake fluid level is higher than midway between the maximum-full point and the minimum allowable level, remove brake fluid to the midway point before proceeding.
4. Raise and suitably support the vehicle. Refer to Vehicle Lifting.
5. Remove the tire and wheel assemblies.
6. Compress the front caliper piston.
6.1. Install a large C-clamp (3) over the top of the caliper housing (2) and against the back of the outboard pad.
6.2. Slowly tighten the C-clamp (3) until the piston pushes into the caliper bore enough to slide the caliper off the rotor.
6.3. Remove the C-clamp (3) from the caliper.
Notice: Support the brake caliper with heavy mechanic's wire, or equivalent, whenever it is separated from it's mount and the hydraulic flexible brake hose is still connected. Failure to support the caliper in this manner will cause the flexible brake hose to bear the weight of the caliper, which may cause damage to the brake hose and in turn may cause a brake fluid leak.
7. Remove the caliper from the mounting bracket and support the caliper with heavy mechanic's wire or equivalent. DO NOT disconnect the hydraulic brake flexible hose from the caliper.
8. Remove the front outboard brake pad. Use a flat - bladed tool to disengage the bottoms on the front brake pad from the holes in the front brake caliper housing.
9. Remove the front inboard brake pad.
10. Replace any corroded caliper bolts, bushings, or sleeves. Do not attempt to polish away any corrosion.
11. Replace any nicked or cut caliper bolt bushings or seals.
Installation Procedure
1. Using a C-clamp, bottom the piston into the caliper bore. Use an old brake pad or wooden block placed across the face of the piston. Do not damage the piston or the caliper boot.
2. Lubricate the front brake caliper, bushings, bolts and seals with high temperature silicone brake lubricant.
3. Install the front inboard brake pad.
^ The front brake pad retainer spring is already staked to the brake pad.
^ The front brake pad must lay flat against the front brake caliper piston.
4. Install the front outboard brake pad with the wear indicator at the leading edge of the front brake pad during forward wheel rotation. The back of the front brake pad must lay flat against the front brake caliper.
5. Remove the support and install the front brake caliper onto the front brake rotor.
6. Install the tire and wheel assemblies.
7. Lower the vehicle.
8. With the engine OFF, gradually apply the brake pedal approximately 2/3 of it's travel distance.
9. Slowly release the brake pedal.
10. Wait 15 seconds, then repeat steps 8-9 until a firm brake pedal is obtained. This will properly seat the brake caliper pistons and brake pads.
11. Fill the brake master cylinder to the proper level.
12. Burnish the pads and rotors.