Brakes - Squealing
70/03/96/US12/31/96
SUBJECT
PRIDE - Brake Squeal
MODEL AFFECTED VEHICLES
Range Rover 4.0/4.6 LP up to VA346794
LH
LJ
LD
DETAIL
Improved brake pads, with revised anti-squeal shims, have been developed to address customer complaint of brake squeal. The new specification includes self-adhesive shims which bond to the brake pistons. A high standard of cleanliness is essential to ensure a successful bond. The new specification was introduced in the production line at the start of 1997 model year (VIN VA 346794). The following procedure should be used on customer complaint on vehicles prior to this VIN.
The diagnostic steps and repair procedures detailed on the following pages were developed as an element of the Land Rover Way OPERATION PRIDE. This TIB provides a library location for PRIDE information within the Land Rover North America technical literature system.
ACTION REQUIRED
Upon customer complaint for the symptoms outlined, perform the specified repairs.
PARTS INFORMATION
STC3685 - Pad Set (Front Axle)
STC3684 Pad Set (Rear Axle)
Locally sourced item:
^ Brake Cleaner
WARRANTY
Normal warranty procedures and policies apply.
COMP. CODE
SRO
70.40.01- Time 0.95 hr.
Replace Brake Pads (car set)
(See service bulletin W97-001 for warranty information.)
PROCEDURE
Perform the diagnostic procedures and repairs outlined below for the repair of Brake Squeal.
FRONT BRAKE PADS
1. Raise the vehicle.
WARNING: Support vehicle on safety stands.
2. Remove the front wheels.
3. Push back the piston rod by pulling the hydraulic body towards you. This process can be accomplished by placing a screwdriver into the slot in the caliper hydraulic housing, and gently levering the caliper against the disc outboard face.
4. Remove the lower guide pin bolt of each caliper.
CAUTION: The guide pin uses a special flange-headed bolt (STC1914). Do not use any other type of bolt
5. Swivel caliper upwards.and remove brake pads.
6. Clean the caliper piston and housing finger face with Berkebile brake cleaner and a clean lint-free cloth.
7. Fit new pads (STC3685) with the pad chamfers towards the bottom of the caliper (the leading edge of the disc.)
8. Peel the protective backing off of the brake pads.
CAUTION: Do not touch the adhesive backing of the pads because it will degrade the adhesive properties.
9. Swivel caliper down into position.
CAUTION: Ensure that the caliper slides over pads without damaging the adhesive backing of the pads.
10. Reinstall and tighten guide pin bolt to 28 Nm. (21 lbf. ft.).
11. Reinstall front wheels and tighten lug nuts to 108 Nm. (80 lbf. ft).
12. Pump the brake pedal to reset caliper to brake pad clearance before attempting to move the vehicle.
WARNING: Failure to reset caliper to brake pad clearance could result in personal injury or vehicle damage.
13. Check brake fluid reservoir fluid level. Top off if necessary with correct type of brake fluid.
14. Remove safety stands and lower vehicle.
REAR BRAKE PADS
1. Raise the vehicle.
WARNING: Support vehicle on safety Stands.
2. Remove rear wheels.
3. Push back the piston rod by pulling the hydraulic body towards you. This process can be accomplished by placing a screwdriver into the slot in the caliper hydraulic housing and gently levering the caliper against the disc outboard face.
4. Remove the lower guide pin bolt of each caliper.
CAUTION: The guide pin uses a special flange-headed bolt (STC1914). Do not use any other type of bolt
5. Swivel caliper upwards and remove brake pads.
6. Clean the caliper piston and housing finger face with Berkebile brake cleaner and a clean lint free cloth.
7. Fit new pads (STC3684) with the pad chamfers towards the bottom of the caliper (the leading edge of the disc.)
8. Peel the protective backing off of the brake pads.
CAUTION: Do not touch the adhesive backing of the pads because it will degrade the adhesive properties.
9. Swivel caliper down into position.
10. Reinstall and tighten guide pin bolt to 28 Nm. (21 lbf. ft.).
11. Reinstall rear wheels and tighten lug nuts to 108 Nm. (80 lbf. ft.).
12. Pump the brake pedal to reset caliper to brake pad clearance before attempting to move the vehicle.
WARNING: Failure to reset caliper to brake pad clearance could result in personal injury or vehicle damage.
13. Check brake fluid reservoir fluid level. Top off if necessary with correct type of brake fluid.
14. Remove safety stands and lower vehicle.