GMC T Series 1994 Repair Manual page 281

SUBJECT
Master C y lin d er..................................................................................................................................................................5A-1
Vacuum B ooster.............................................................................................................................................................. 5D1-1
Hydraulic B o o ster........................................................................................................................................................... 5D2-1
NOTICE: When fasteners are removed, always reinstall them at the same location from which they were
removed. If a fastener needs to be replaced, use the correct part number fastener for that application. If
the correct part number fastener is not available, a fastener of equal size and strength (or stronger) may
be used. Fasteners that are not reused and those requiring thread locking compound will be called out.
The correct torque value m ust be used when installing fasteners that require it. If the above conditions
are not followed, parts or system damage could result
NOTICE: Do not hone the master cylinder bore. When the brake master cylinder is overhauled, it is
recommended that the cylinder body be replaced rather than "cleaned up" by honing the bore. The
master cylinder has a hard, highly polished "bearingized" surface, which is produced by diamond boring
followed by ball or roller burnishing under heavy pressure. Honing will destroy this hard smooth surface
and cause rapid wear of the rubber cups.
NOTICE: Do not use unapproved solvents when cleaning or flushing the master cylinder and related
components. The use of these liquids as cleaning solvent will damage the rubber parts in the system if
they have any trace of mineral oil or other contaminants.
SUBJECT
General D escription.......................................................................................................................................................... 5A-2
Master C y lin d ers................................................................................................................................................................5A-2
Composite Master Cylinder.........................................................................................................................................5A-2
Cast Iron Master C ylin d er...........................................................................................................................................5A-4
Bendix Master C ylin d er............................................................................................................................................... 5A-5
Specificatio n s..................................................................................................................................................................... 5A-6
Fastener Tightening Specifications.......................................................................................................................... 5A-6
SECTION 5
BRAKES
CONTENTS
SECTION 5A
MASTER CYLINDER
CONTENTS
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