CAMPAIGN: LEFT FRT. BRAKE PIPE INTERFER. W/CC SERVO BRACKET
MODELS/YEARS 1989 OLDSMOBILE TORONADO AND TROFEO MODELS WITH ANTI-LOCK BRAKE SYSTEM
CONDITION
General Motors has determined that a defect which relates to motor vehicle safety exists in some 1989 Oldsmobile Toronado and Trofeo models equipped with Anti-Lock Brake System (ABS). Involved vehicles may have been assembled with the left front brake pipe too close to the cruise control servo bracket. This condition could allow the left front brake line to contact the cruise control servo bracket. Over time, this contact could allow the brake line to wear through, causing a loss of brake fluid and a partial loss of braking capability. Part of the brake system will still work and allow the vehicle to be stopped, but over a greater distance. A partial loss of braking capability at a time when minimum stopping distance is required could result in a vehicle crash without prior warning.
VEHICLES INVOLVED
Certain 1989 Oldsmobile Toronado and Trofeo models equipped with Anti-Lock Brake System (option code JL9) within the following VIN breakpoints:
Beginning Through and Including --------- --------------------- KU300001 KU306630
Only vehicles with ANTI-LOCK BRAKE SYSTEMS are involved in this campaign.
DEALER ACTION
To correct this condition, dealers are to replace the left front brake pipe assembly on all vehicles involved according to the instructions in the SERVICE PROCEDURE section of this bulletin.
Dealers are to service all involved vehicles at no charge to owners, regardless of mileage, age of vehicle, or ownership from this time forward.
Whenever a vehicle subject to this campaign is taken into your new or used car inventory, or it is in your dealership for service, you are to ensure the campaign correction has been made before selling or releasing the vehicle.
Dealers are to contact owners of vehicles recently sold from your new vehicle inventory and arrange for the campaign correction to be performed.
SERVICE PROCEDURE
CAUTION:
Before disconnecting any hydraulic lines, hoses or fittings, be sure that the accumulator is fully depressurized. Failure to depressurize the hydraulic accumulator may result in personal injury or damage to painted surfaces.
The following steps are to be used to replace the left front brake pipe assembly. Vehicle should be located over a hoist:
1. With the ignition off, depressurize the hydraulic accumulator by pumping the brake pedal a minimum of 25 times using a pedal force of approximately 222 N (50 lbs.). When a definite increase in pedal effort is felt, stroke the pedal a few additional times. This should remove all hydraulic pressure from the system.
2. Raise hood and install left fender cover.
NOTICE: Brake fluid will damage painted surfaces. Shop cloths and clean containers should be used to prevent spillage of brake fluid.
3. To provide access to the brake pipe, remove all electrical connections to the hydraulic brake unit.
4. Loosen the left front brake fitting at the hydraulic unit. The left front brake pipe assembly is the forward most pipe on the bottom of the brake hydraulic unit (See Figure 1).
5. Remove the left front tire and wheel assembly (and wheel cover, if so equipped). To provide adequate clearance, turn the front wheel to the left.
6. Loosen the left front brake line fitting at the hose end (See Figure 2).
7. Remove the left front brake pipe assembly. The brake pipe is attached to a clip which is held in place at the engine compartment frame rail (See Figure 3). Remove the clip with the brake line assembly and attach it to the replacement brake pipe assembly (part number 3521577).
8. Route the new brake pipe assembly into position and finger tighten the fitting at the brake hydraulic unit. Verify that the left front brake pipe assembly is properly positioned before tightening.
9. Tighten the brake fitting at the left front wheel to 15 N.m (11 lbs.-ft.).
10. Tighten the line at the hydraulic unit to 12 N.m (106 lbs.-in.).
11. Secure the left front brake pipe clip into the inner fender in the engine compartment.
12. Verify that the brake lines do not contact the cruise control servo bracket or cruise cable. Verify that all brake pipes do not contact each other in the area of the brake hydraulic unit and cruise control servo bracket. Bend brake pipes away (rearward) from the left front pipe to maintain a minimum of 15 mm (.6 inch) clearance, if required.
13. Replace all electrical connections.
14. Bleed left front brake circuit. Follow proper bleeding procedure in Section 5E of the 1989 Oldsmobile Toronado Service Manual. Add brake fluid to the Hydraulic Unit reservoir as required (to the mark only).
NOTICE: Use only Delco Supreme No. 11 Hydraulic Brake Fluid or equivalent ("DOT 3") from a clean, sealed container. Do not use any fluid from a container which is wet with water. Use of DOT 5 silicone fluid is NOT recommended; internal damage to the pump components may result.
15. Turn ignition on, check for leaks and proper brake pedal "feel" and effort.
16. Replace left front tire and wheel assembly (and wheel cover, if so equipped).
17. Verify that the hydraulic Unit reservoir is filled to the correct level (fill to the mark only; do not overfill or underfill).
18. Install Campaign Identification Label, remove fender cover, and close hood.
19. Verify that brake system is operating properly.
CAMPAIGN IDENTIFICATION LABEL
Each label provides space to print the campaign number, and the five (5) digit dealer code of the dealer performing the campaign. Insert this information with a typewriter or ballpoint pen. When installing label, clean and dry the surface of the radiator support tie bar and apply the campaign label where it is readily visible.
PARTS INFORMATION
To ensure parts are obtained as soon as possible, order them from GM Service Parts Operations (GMSPO) on a C.I.O. order, with NO special instruction code, but order on an Advise Code (2). Use the following part numbers:
Description Part Number Quantity Per Vehicle ------------ ----------- -------------------- Pipe Assembly, Left Front Brake 3521577 1 Brake Fluid - DOT 3 1052535 As required
WARRANTY CLAIM INFORMATION
PC PART-NO. TOT-PTS TC LAB-OP LHRS ST SUBLET -- -------- ------- -- ------ ---- -- ------ Replace Left Front Brake Pipe Assembly
96 V5340 .7* -- ---
* .1 hour for clerical administration may be added to the above operation.
Pans Allowance: Current dealer price, plus 30% allowance for handling.
Brake fluid may be applied for in the usual manner.
General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.
