Disc Brake System - Noise
Bulletin No. T 87-106File in Group 5
Number 17
Corp. Ref. No. 715002
Date May '87
SUBJECT: BRAKE LINING MATERIAL CHANGE
MODELS AFFECTED: 1986-1987 ELDORADO AND SEVILLE 1987 ALLANTE
A production change was made to the front and rear brake linings used on the 1987 Eldorado, Seville and Allante, effective at the following breakpoints:
MODEL B.C. #
Eldorado 611230
Seville 802650
Allante 100724
This change includes a new lining material and extended shoes which eliminate the need for the stainless steel shoe abutment insulators. The new shoe and lining may be identified by the following methods:
Figure 1 - Outboard Lining:
LINING EDGE CODE
The lining edge code, which is stamped in the lining material at the locations shown in Figure 1, may be used to identify the new shoe and lining assemblies. The new design shoe and lining assemblies use the edge code "DM 128 FE", while early production linings include the edge code "DM 121 FE".
LINING WEAR INDICATOR COLOR
New design shoe and lining assemblies may also be identified by the color of the lining wear indicator, as shown in Figure 1. New lining kits have a blue wear indicator, while early production linings include wear indicators which are black or gray.
Disc brake noise may be reduced on models built prior to the above breakpoints by installing the new design linings. These shoe and lining kits are available from GMSPO using the following part numbers:
KIT TYPE P/N
Front 12321440
Rear 12321441
Figure 2 - Front Caliper Assembly:
The length of the shoe in these kits has been increased so that the stainless steel shoe abutment insulators, shown in Figure 2, are no longer required. When installing the new lining kits, discard the shoe abutment insulators. An instruction sheet is included with all new lining kits. Refer to the appropriate Service Information Manual, Sections 5B3 and 5B7, for installation procedures.
For warranty purposes, use Labor Operation H0042 at .6 hours for the front disc pads and H0043 at .8 hours for the rear disc pads.