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TSB 08-3-5
02/18/08
REAR BRAKE NOISE - ROTATIONAL CHIRP -
VEHICLES BUILT BEFORE 10/5/2007
FORD:
2008 Escape
MERCURY:
2008 Mariner
This article supersedes TSB 07-22-1 to update the Service Procedure.
ISSUE
Some 2008 Escape and Mariner (Excludes Hybrid) vehicles built before 10/5/2007 may exhibit a noise from the rear brakes while coming to a stop. This condition does not affect brake performance. The noise is typically described as a cyclic, scraping, or rotational chirp noise.
ACTION
Follow the Service Procedure steps to correct the condition.
SERVICE PROCEDURE
Vehicles built prior to 6/15/2007 follow both procedures A and B.
Vehicles built after 6/15/2007 perform only procedure B.
NOTE
PERFORMING PROCEDURE B IS THE MOST CRITICAL PART OF THIS REPAIR. ADDING LUBRICANT TO THE WHEEL CYLINDER PISTONS WILL REDUCE FRICTION BETWEEN THE WHEEL CYLINDER PISTON AND ALUMINUM WHEEL CYLINDER WALL ELIMINATING NOISE SOURCE.
PROCEDURE A
1. Replace the rear brake shoes. Refer to Workshop Manual (WSM), Section 206-02.
2. Apply Motorcraft(R) Silicone Brake Caliper Grease and Dielectric Compound to the contact points between the shoe and the rear backing plate. Ensure grease will not contact brake lining surface.
PROCEDURE B
1. Remove the rear brake shoe return springs.
2. With the brake shoe return springs removed push the leading or trailing shoe into the wheel cylinder until the shoe bottoms out. The wheel cylinder dust boot (opposite depressed shoe) will have to be pulled back to reveal the wheel cylinder piston.
3. Apply Motorcraft® Silicone Brake Caliper Grease and Dielectric Compound around the wheel cylinder pistons and then repeat procedure for opposite side wheel cylinder pistons.
4. Once both wheel cylinder pistons have been lubricated, shuttle the pistons side to side three (3) or more times to distribute the lubricant and ensure smooth movement.
Parts Block
WARRANTY STATUS: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage
IMPORTANT: Warranty coverage limits/policies are not altered by a TSB. Warranty coverage limits are determined by the identified causal part.
DEALER CODING
02/18/08
REAR BRAKE NOISE - ROTATIONAL CHIRP -
VEHICLES BUILT BEFORE 10/5/2007
FORD:
2008 Escape
MERCURY:
2008 Mariner
This article supersedes TSB 07-22-1 to update the Service Procedure.
ISSUE
Some 2008 Escape and Mariner (Excludes Hybrid) vehicles built before 10/5/2007 may exhibit a noise from the rear brakes while coming to a stop. This condition does not affect brake performance. The noise is typically described as a cyclic, scraping, or rotational chirp noise.
ACTION
Follow the Service Procedure steps to correct the condition.
SERVICE PROCEDURE
Vehicles built prior to 6/15/2007 follow both procedures A and B.
Vehicles built after 6/15/2007 perform only procedure B.
NOTE
PERFORMING PROCEDURE B IS THE MOST CRITICAL PART OF THIS REPAIR. ADDING LUBRICANT TO THE WHEEL CYLINDER PISTONS WILL REDUCE FRICTION BETWEEN THE WHEEL CYLINDER PISTON AND ALUMINUM WHEEL CYLINDER WALL ELIMINATING NOISE SOURCE.
PROCEDURE A
1. Replace the rear brake shoes. Refer to Workshop Manual (WSM), Section 206-02.
2. Apply Motorcraft(R) Silicone Brake Caliper Grease and Dielectric Compound to the contact points between the shoe and the rear backing plate. Ensure grease will not contact brake lining surface.
PROCEDURE B
1. Remove the rear brake shoe return springs.
2. With the brake shoe return springs removed push the leading or trailing shoe into the wheel cylinder until the shoe bottoms out. The wheel cylinder dust boot (opposite depressed shoe) will have to be pulled back to reveal the wheel cylinder piston.
3. Apply Motorcraft® Silicone Brake Caliper Grease and Dielectric Compound around the wheel cylinder pistons and then repeat procedure for opposite side wheel cylinder pistons.
4. Once both wheel cylinder pistons have been lubricated, shuttle the pistons side to side three (3) or more times to distribute the lubricant and ensure smooth movement.
Parts Block
PART NUMBER | PART NAME |
8L8Z-2200-BD | Brake Lining Kit |
XG-3-A | Motorcraft(R) Silicone Brake Caliper Grease and Dielectric Compound |
IMPORTANT: Warranty coverage limits/policies are not altered by a TSB. Warranty coverage limits are determined by the identified causal part.
OPERATION | DESCRIPTION | TIME |
080305A | 2008 Escape/Mariner Built Prior To 6/15/2007: Replace the Rear Brake Shoes Includes Time To Apply Silicone Lubricant to Contact points And Wheel Cylinder Pistons (Do Not Use With 2001BB 2001B1B) | 1.0 Hrs. |
080305B | 2008 Escape/Mariner Built After 6/15/2007: Apply Silicone Lubricant to Wheel Cylinder Pistons, Includes Time To Remove and Re-Install Rear Brake Shoe Return Springs (Do Not Use With 2001BB, 2001B1B) | 0.7 Hr. |
BASIC PART NO. | CONDITION CODE |
2200 | 42 |