2007 Chevrolet HHR Brake Service (ONLINE REPAIR MANUALS)

When working on or around brake assemblies, care must be taken to prevent breathing asbestos dust, as many manufacturers incorporate asbestos fibers in the production of brake linings. During routine service operations, the amount of asbestos dust from brake lining wear is at a low level because of a chemical breakdown during use and a few precautions will minimize exposure. Do not sand or grind brake linings unless suitable local exhaust ventilation equipment is used to prevent excessiv...

Manual Bleed

• If vehicle is equipped with power brakes, remove vacuum reserve by applying brakes several times with engine off.
• Fill master cylinder reservoirs with suitable brake fluid. Ensure to always keep master cylinder reservoirs at least half full during entire bleeding procedure.
• If master cylinder is suspected to have air in bore, it must be bled first. To bleed master cylinder, proceed as follows:
• Disconnect forward brake pipe connection at master cylinder.
• Allow brake fluid to fill master cylinder bore until it begins to flow from forward pipe connector port.
• Connect and ...

Vue

Removal

• Raise and support vehicle.
• Mark relationship of drum to hub.
• Remove and discard retaining clip.
• Remove brake drum. If brake drum does not come off easily, proceed as follows:
• Loosen parking brake cable.
• Remove backing plate access hole plug.
• Disengage self adjuster by inserting suitable flat-bladed tool through backing plate access hole.
• Loosen adjuster screw by inserting another flat-bladed tool through access hole .
• Install access hole plug.
• Apply small amount of penetrating oil around brake drum center hole.
• Remove brake drum.
• Disengage adjuster spring hook end from tab on adjus...

Brake Lines & Linings

Remove one of the front wheels and inspect the brake disc, caliper and linings.

Do not allow any oil or grease on the linings. It is recommended that linings be replaced in sets when worn or damaged.

If the caliper is cracked or fluid leakage through the casting is evident, it must be replaced as a unit.

Brake Roughness

The most common cause of brake chatter on disc brakes is a variation in thickness of the disc. If roughness or vibration is encountered during highway operation or if pedal pumping is experienced at low speeds, the disc may have excessive thickness v...

Brake System Bleed

ABS Automated Bleed Procedure

Before performing the ABS Automated Bleed Procedure, first perform "Manual" or "Pressure" bleed of the base brake system. The automated bleed procedure is recommended when one of the following conditions exist: Base brake system bleeding does not achieve the desired pedal height or feel. Extreme loss of brake fluid has occurred. Air ingestion is suspected in the secondary circuits of the brake modulator assembly.

The ABS automated bleed procedure uses a scan tool to cycle the system solenoid valves and run the pump in order to purge any a...

Delco Master Cylinder

When performing the following procedures, refer to Fig. noting that the composite reservoir may vary in design.

Disassemble

• Remove master cylinder from vehicle.
• Remove reservoir cover and diaphragm. Discard old brake fluid in reservoir.
• Inspect cover and diaphragm. Replace if cut, cracked or deformed.
• Remove fluid level switch and proportioning valve assembly, if equipped.
• Depress primary piston and remove lock ring.
• Plug primary fluid outlet (outlet nearest to cowl when master cylinder is installed), then apply compressed air into secondary fluid outlet to remo...