Suburban 3/4 Ton 4WD V8-305 5.0L (1986)
FIGURE 4 - ROTOR MOUNTING ADAPTER - J 37160
^
Adapters, if used, must be clean and free of nicks. Adapters may be used because of a two piece composite rotor design. (Refer to Figure 4).
^
The rotor surface contacting the arbor and/or the adapter must be free of debris and coarse surface corrosion.
^
If the dealership's rotor turning equipment cannot produce a finish cut equivalent to a new rotor's surface, finish cuts may be further improved and
made non-directional by dressing the rotor surface with a sanding disc power tool.
Light scoring of the rotor surfaces not exceeding 0.38 mm (0.015 inch) in depth, which may result from normal use, will not affect brake operation.
To become familiar with the required surface finish, drag a fingernail over the surface of a new rotor from the parts stock or one on a new vehicle. If
your brake equipment cannot produce this smooth a finish when correctly used, contact the equipment manufacturer for corrective instructions.
Following these refinishing specifications and recommendations will help to hold the rotor surface finish to the specified range. Controlling the braking
surface finish of the rotor is necessary to provide adequate early stopping ability and to avoid pulls and erratic performance and will aid in extending
lining life.
